Membrane distillation treatment of high-salinity mine water

The main coal producing areas in western China have the problems of dry climate and water shortage, and the mine water produced by coal mining generally has the characteristics of high salinity and high hardness. At present, the zero-discharge treatment of high-salinity mine water generally has the problems of complex process and high operating cost. In order to shorten the treatment process and improve the treatment efficiency, in this study, the vacuum membrane distillation technology was applied to replace the existing multi-stage reverse osmosis membrane concentration technology for the high-salinity mine water concentration and desalination treatment process. The high-salinity mine water after a lime-soda softening treatment was treated with different concentration ratios, and the membrane fouling mechanism and membrane cleaning method during the concentration process were studied. The results showed that with the increase of the concentration ratio, the membrane flux and desalination rate of the polyvinylidene fluoride (PVDF) hollow fiber membrane gradually decreased, while the conductivity of the produced water increased slowly. When the concentration ratio was up to 27 times, the membrane flux was 8.87 L/(m2·h), the salt rejection rate was 99.7%, and the water conductance was 26.6 μS/cm. The membrane distillation process was inhibited by the membrane fouling caused by the scaling of calcium and magnesium ions in mine water, and the inorganic salt deposits could not be removed by physical methods such as backwashing and ultrasonic cleaning. After 96 hours of continuous operation, the PVDF membrane flux reduced from 12.85 L/(m2·h) to 5.21 L/(m2·h). The pretreatment process of hardness removal had obvious influence on the calcium and magnesium scaling in the membrane distillation process. When the hardness removal rate exceeded 95%, the desalting rate and membrane flux attenuation of PVDF membrane were obviously weakened. The membrane fouling caused by the calcium and magnesium precipitation could be effectively removed by the citric acid cleaning agent. Under the optimized conditions of citric acid concentration of 0.87 mol/L, the cleaning temperature of 38 ℃ and the cleaning time of 40 min, the membrane cleaning efficiency could reach 99.5%. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to characterize the microscopic morphology and structure of the original film, the contaminated film and the film after chemical cleaning. The results showed that the deposited pollutants on the surface of the cleaned film were significantly reduced, but the surface morphology and microscopic structure were irreversibly changed. Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Qiang GUO [verfasserIn] Jingfeng LI [verfasserIn] Zhaofeng LIU [verfasserIn] Zhiguo CAO [verfasserIn] Ruimin HE [verfasserIn] Wei BIAN [verfasserIn] Shuqin LIU [verfasserIn]

Format:	E-Artikel
Sprache:	Chinesisch

Erschienen:	2023

Schlagwörter:	coal mine water water treatment membrane distillation membrane fouling membrane cleaning

Übergeordnetes Werk:	In: Meitan xuebao - Editorial Office of Journal of China Coal Society, 2021, 48(2023), 9, Seite 3494-3502
Übergeordnetes Werk:	volume:48 ; year:2023 ; number:9 ; pages:3494-3502

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.13225/j.cnki.jccs.2022.1253

Katalog-ID:	DOAJ099520370

Internformat


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520			\|a The main coal producing areas in western China have the problems of dry climate and water shortage, and the mine water produced by coal mining generally has the characteristics of high salinity and high hardness. At present, the zero-discharge treatment of high-salinity mine water generally has the problems of complex process and high operating cost. In order to shorten the treatment process and improve the treatment efficiency, in this study, the vacuum membrane distillation technology was applied to replace the existing multi-stage reverse osmosis membrane concentration technology for the high-salinity mine water concentration and desalination treatment process. The high-salinity mine water after a lime-soda softening treatment was treated with different concentration ratios, and the membrane fouling mechanism and membrane cleaning method during the concentration process were studied. The results showed that with the increase of the concentration ratio, the membrane flux and desalination rate of the polyvinylidene fluoride (PVDF) hollow fiber membrane gradually decreased, while the conductivity of the produced water increased slowly. When the concentration ratio was up to 27 times, the membrane flux was 8.87 L/(m2·h), the salt rejection rate was 99.7%, and the water conductance was 26.6 μS/cm. The membrane distillation process was inhibited by the membrane fouling caused by the scaling of calcium and magnesium ions in mine water, and the inorganic salt deposits could not be removed by physical methods such as backwashing and ultrasonic cleaning. After 96 hours of continuous operation, the PVDF membrane flux reduced from 12.85 L/(m2·h) to 5.21 L/(m2·h). The pretreatment process of hardness removal had obvious influence on the calcium and magnesium scaling in the membrane distillation process. When the hardness removal rate exceeded 95%, the desalting rate and membrane flux attenuation of PVDF membrane were obviously weakened. The membrane fouling caused by the calcium and magnesium precipitation could be effectively removed by the citric acid cleaning agent. Under the optimized conditions of citric acid concentration of 0.87 mol/L, the cleaning temperature of 38 ℃ and the cleaning time of 40 min, the membrane cleaning efficiency could reach 99.5%. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to characterize the microscopic morphology and structure of the original film, the contaminated film and the film after chemical cleaning. The results showed that the deposited pollutants on the surface of the cleaned film were significantly reduced, but the surface morphology and microscopic structure were irreversibly changed.
650		4	\|a coal mine water
650		4	\|a water treatment
650		4	\|a membrane distillation
650		4	\|a membrane fouling
650		4	\|a membrane cleaning
653		0	\|a Geology
653		0	\|a Mining engineering. Metallurgy
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allfields	10.13225/j.cnki.jccs.2022.1253 doi (DE-627)DOAJ099520370 (DE-599)DOAJ8b46cfd686f44d22b0f3bff9d3f4358e DE-627 ger DE-627 rakwb chi QE1-996.5 TN1-997 Qiang GUO verfasserin aut Membrane distillation treatment of high-salinity mine water 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The main coal producing areas in western China have the problems of dry climate and water shortage, and the mine water produced by coal mining generally has the characteristics of high salinity and high hardness. At present, the zero-discharge treatment of high-salinity mine water generally has the problems of complex process and high operating cost. In order to shorten the treatment process and improve the treatment efficiency, in this study, the vacuum membrane distillation technology was applied to replace the existing multi-stage reverse osmosis membrane concentration technology for the high-salinity mine water concentration and desalination treatment process. The high-salinity mine water after a lime-soda softening treatment was treated with different concentration ratios, and the membrane fouling mechanism and membrane cleaning method during the concentration process were studied. The results showed that with the increase of the concentration ratio, the membrane flux and desalination rate of the polyvinylidene fluoride (PVDF) hollow fiber membrane gradually decreased, while the conductivity of the produced water increased slowly. When the concentration ratio was up to 27 times, the membrane flux was 8.87 L/(m2·h), the salt rejection rate was 99.7%, and the water conductance was 26.6 μS/cm. The membrane distillation process was inhibited by the membrane fouling caused by the scaling of calcium and magnesium ions in mine water, and the inorganic salt deposits could not be removed by physical methods such as backwashing and ultrasonic cleaning. After 96 hours of continuous operation, the PVDF membrane flux reduced from 12.85 L/(m2·h) to 5.21 L/(m2·h). The pretreatment process of hardness removal had obvious influence on the calcium and magnesium scaling in the membrane distillation process. When the hardness removal rate exceeded 95%, the desalting rate and membrane flux attenuation of PVDF membrane were obviously weakened. The membrane fouling caused by the calcium and magnesium precipitation could be effectively removed by the citric acid cleaning agent. Under the optimized conditions of citric acid concentration of 0.87 mol/L, the cleaning temperature of 38 ℃ and the cleaning time of 40 min, the membrane cleaning efficiency could reach 99.5%. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to characterize the microscopic morphology and structure of the original film, the contaminated film and the film after chemical cleaning. The results showed that the deposited pollutants on the surface of the cleaned film were significantly reduced, but the surface morphology and microscopic structure were irreversibly changed. coal mine water water treatment membrane distillation membrane fouling membrane cleaning Geology Mining engineering. Metallurgy Jingfeng LI verfasserin aut Zhaofeng LIU verfasserin aut Zhiguo CAO verfasserin aut Ruimin HE verfasserin aut Wei BIAN verfasserin aut Shuqin LIU verfasserin aut In Meitan xuebao Editorial Office of Journal of China Coal Society, 2021 48(2023), 9, Seite 3494-3502 (DE-627)578540479 (DE-600)2452312-4 02539993 nnns volume:48 year:2023 number:9 pages:3494-3502 https://doi.org/10.13225/j.cnki.jccs.2022.1253 kostenfrei https://doaj.org/article/8b46cfd686f44d22b0f3bff9d3f4358e kostenfrei http://www.mtxb.com.cn/article/doi/10.13225/j.cnki.jccs.2022.1253 kostenfrei https://doaj.org/toc/0253-9993 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2817 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 48 2023 9 3494-3502
spelling	10.13225/j.cnki.jccs.2022.1253 doi (DE-627)DOAJ099520370 (DE-599)DOAJ8b46cfd686f44d22b0f3bff9d3f4358e DE-627 ger DE-627 rakwb chi QE1-996.5 TN1-997 Qiang GUO verfasserin aut Membrane distillation treatment of high-salinity mine water 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The main coal producing areas in western China have the problems of dry climate and water shortage, and the mine water produced by coal mining generally has the characteristics of high salinity and high hardness. At present, the zero-discharge treatment of high-salinity mine water generally has the problems of complex process and high operating cost. In order to shorten the treatment process and improve the treatment efficiency, in this study, the vacuum membrane distillation technology was applied to replace the existing multi-stage reverse osmosis membrane concentration technology for the high-salinity mine water concentration and desalination treatment process. The high-salinity mine water after a lime-soda softening treatment was treated with different concentration ratios, and the membrane fouling mechanism and membrane cleaning method during the concentration process were studied. The results showed that with the increase of the concentration ratio, the membrane flux and desalination rate of the polyvinylidene fluoride (PVDF) hollow fiber membrane gradually decreased, while the conductivity of the produced water increased slowly. When the concentration ratio was up to 27 times, the membrane flux was 8.87 L/(m2·h), the salt rejection rate was 99.7%, and the water conductance was 26.6 μS/cm. The membrane distillation process was inhibited by the membrane fouling caused by the scaling of calcium and magnesium ions in mine water, and the inorganic salt deposits could not be removed by physical methods such as backwashing and ultrasonic cleaning. After 96 hours of continuous operation, the PVDF membrane flux reduced from 12.85 L/(m2·h) to 5.21 L/(m2·h). The pretreatment process of hardness removal had obvious influence on the calcium and magnesium scaling in the membrane distillation process. When the hardness removal rate exceeded 95%, the desalting rate and membrane flux attenuation of PVDF membrane were obviously weakened. The membrane fouling caused by the calcium and magnesium precipitation could be effectively removed by the citric acid cleaning agent. Under the optimized conditions of citric acid concentration of 0.87 mol/L, the cleaning temperature of 38 ℃ and the cleaning time of 40 min, the membrane cleaning efficiency could reach 99.5%. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to characterize the microscopic morphology and structure of the original film, the contaminated film and the film after chemical cleaning. The results showed that the deposited pollutants on the surface of the cleaned film were significantly reduced, but the surface morphology and microscopic structure were irreversibly changed. coal mine water water treatment membrane distillation membrane fouling membrane cleaning Geology Mining engineering. Metallurgy Jingfeng LI verfasserin aut Zhaofeng LIU verfasserin aut Zhiguo CAO verfasserin aut Ruimin HE verfasserin aut Wei BIAN verfasserin aut Shuqin LIU verfasserin aut In Meitan xuebao Editorial Office of Journal of China Coal Society, 2021 48(2023), 9, Seite 3494-3502 (DE-627)578540479 (DE-600)2452312-4 02539993 nnns volume:48 year:2023 number:9 pages:3494-3502 https://doi.org/10.13225/j.cnki.jccs.2022.1253 kostenfrei https://doaj.org/article/8b46cfd686f44d22b0f3bff9d3f4358e kostenfrei http://www.mtxb.com.cn/article/doi/10.13225/j.cnki.jccs.2022.1253 kostenfrei https://doaj.org/toc/0253-9993 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2817 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 48 2023 9 3494-3502
allfields_unstemmed	10.13225/j.cnki.jccs.2022.1253 doi (DE-627)DOAJ099520370 (DE-599)DOAJ8b46cfd686f44d22b0f3bff9d3f4358e DE-627 ger DE-627 rakwb chi QE1-996.5 TN1-997 Qiang GUO verfasserin aut Membrane distillation treatment of high-salinity mine water 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The main coal producing areas in western China have the problems of dry climate and water shortage, and the mine water produced by coal mining generally has the characteristics of high salinity and high hardness. At present, the zero-discharge treatment of high-salinity mine water generally has the problems of complex process and high operating cost. In order to shorten the treatment process and improve the treatment efficiency, in this study, the vacuum membrane distillation technology was applied to replace the existing multi-stage reverse osmosis membrane concentration technology for the high-salinity mine water concentration and desalination treatment process. The high-salinity mine water after a lime-soda softening treatment was treated with different concentration ratios, and the membrane fouling mechanism and membrane cleaning method during the concentration process were studied. The results showed that with the increase of the concentration ratio, the membrane flux and desalination rate of the polyvinylidene fluoride (PVDF) hollow fiber membrane gradually decreased, while the conductivity of the produced water increased slowly. When the concentration ratio was up to 27 times, the membrane flux was 8.87 L/(m2·h), the salt rejection rate was 99.7%, and the water conductance was 26.6 μS/cm. The membrane distillation process was inhibited by the membrane fouling caused by the scaling of calcium and magnesium ions in mine water, and the inorganic salt deposits could not be removed by physical methods such as backwashing and ultrasonic cleaning. After 96 hours of continuous operation, the PVDF membrane flux reduced from 12.85 L/(m2·h) to 5.21 L/(m2·h). The pretreatment process of hardness removal had obvious influence on the calcium and magnesium scaling in the membrane distillation process. When the hardness removal rate exceeded 95%, the desalting rate and membrane flux attenuation of PVDF membrane were obviously weakened. The membrane fouling caused by the calcium and magnesium precipitation could be effectively removed by the citric acid cleaning agent. Under the optimized conditions of citric acid concentration of 0.87 mol/L, the cleaning temperature of 38 ℃ and the cleaning time of 40 min, the membrane cleaning efficiency could reach 99.5%. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to characterize the microscopic morphology and structure of the original film, the contaminated film and the film after chemical cleaning. The results showed that the deposited pollutants on the surface of the cleaned film were significantly reduced, but the surface morphology and microscopic structure were irreversibly changed. coal mine water water treatment membrane distillation membrane fouling membrane cleaning Geology Mining engineering. Metallurgy Jingfeng LI verfasserin aut Zhaofeng LIU verfasserin aut Zhiguo CAO verfasserin aut Ruimin HE verfasserin aut Wei BIAN verfasserin aut Shuqin LIU verfasserin aut In Meitan xuebao Editorial Office of Journal of China Coal Society, 2021 48(2023), 9, Seite 3494-3502 (DE-627)578540479 (DE-600)2452312-4 02539993 nnns volume:48 year:2023 number:9 pages:3494-3502 https://doi.org/10.13225/j.cnki.jccs.2022.1253 kostenfrei https://doaj.org/article/8b46cfd686f44d22b0f3bff9d3f4358e kostenfrei http://www.mtxb.com.cn/article/doi/10.13225/j.cnki.jccs.2022.1253 kostenfrei https://doaj.org/toc/0253-9993 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2817 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 48 2023 9 3494-3502
allfieldsGer	10.13225/j.cnki.jccs.2022.1253 doi (DE-627)DOAJ099520370 (DE-599)DOAJ8b46cfd686f44d22b0f3bff9d3f4358e DE-627 ger DE-627 rakwb chi QE1-996.5 TN1-997 Qiang GUO verfasserin aut Membrane distillation treatment of high-salinity mine water 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The main coal producing areas in western China have the problems of dry climate and water shortage, and the mine water produced by coal mining generally has the characteristics of high salinity and high hardness. At present, the zero-discharge treatment of high-salinity mine water generally has the problems of complex process and high operating cost. In order to shorten the treatment process and improve the treatment efficiency, in this study, the vacuum membrane distillation technology was applied to replace the existing multi-stage reverse osmosis membrane concentration technology for the high-salinity mine water concentration and desalination treatment process. The high-salinity mine water after a lime-soda softening treatment was treated with different concentration ratios, and the membrane fouling mechanism and membrane cleaning method during the concentration process were studied. The results showed that with the increase of the concentration ratio, the membrane flux and desalination rate of the polyvinylidene fluoride (PVDF) hollow fiber membrane gradually decreased, while the conductivity of the produced water increased slowly. When the concentration ratio was up to 27 times, the membrane flux was 8.87 L/(m2·h), the salt rejection rate was 99.7%, and the water conductance was 26.6 μS/cm. The membrane distillation process was inhibited by the membrane fouling caused by the scaling of calcium and magnesium ions in mine water, and the inorganic salt deposits could not be removed by physical methods such as backwashing and ultrasonic cleaning. After 96 hours of continuous operation, the PVDF membrane flux reduced from 12.85 L/(m2·h) to 5.21 L/(m2·h). The pretreatment process of hardness removal had obvious influence on the calcium and magnesium scaling in the membrane distillation process. When the hardness removal rate exceeded 95%, the desalting rate and membrane flux attenuation of PVDF membrane were obviously weakened. The membrane fouling caused by the calcium and magnesium precipitation could be effectively removed by the citric acid cleaning agent. Under the optimized conditions of citric acid concentration of 0.87 mol/L, the cleaning temperature of 38 ℃ and the cleaning time of 40 min, the membrane cleaning efficiency could reach 99.5%. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to characterize the microscopic morphology and structure of the original film, the contaminated film and the film after chemical cleaning. The results showed that the deposited pollutants on the surface of the cleaned film were significantly reduced, but the surface morphology and microscopic structure were irreversibly changed. coal mine water water treatment membrane distillation membrane fouling membrane cleaning Geology Mining engineering. Metallurgy Jingfeng LI verfasserin aut Zhaofeng LIU verfasserin aut Zhiguo CAO verfasserin aut Ruimin HE verfasserin aut Wei BIAN verfasserin aut Shuqin LIU verfasserin aut In Meitan xuebao Editorial Office of Journal of China Coal Society, 2021 48(2023), 9, Seite 3494-3502 (DE-627)578540479 (DE-600)2452312-4 02539993 nnns volume:48 year:2023 number:9 pages:3494-3502 https://doi.org/10.13225/j.cnki.jccs.2022.1253 kostenfrei https://doaj.org/article/8b46cfd686f44d22b0f3bff9d3f4358e kostenfrei http://www.mtxb.com.cn/article/doi/10.13225/j.cnki.jccs.2022.1253 kostenfrei https://doaj.org/toc/0253-9993 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2817 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 48 2023 9 3494-3502
allfieldsSound	10.13225/j.cnki.jccs.2022.1253 doi (DE-627)DOAJ099520370 (DE-599)DOAJ8b46cfd686f44d22b0f3bff9d3f4358e DE-627 ger DE-627 rakwb chi QE1-996.5 TN1-997 Qiang GUO verfasserin aut Membrane distillation treatment of high-salinity mine water 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The main coal producing areas in western China have the problems of dry climate and water shortage, and the mine water produced by coal mining generally has the characteristics of high salinity and high hardness. At present, the zero-discharge treatment of high-salinity mine water generally has the problems of complex process and high operating cost. In order to shorten the treatment process and improve the treatment efficiency, in this study, the vacuum membrane distillation technology was applied to replace the existing multi-stage reverse osmosis membrane concentration technology for the high-salinity mine water concentration and desalination treatment process. The high-salinity mine water after a lime-soda softening treatment was treated with different concentration ratios, and the membrane fouling mechanism and membrane cleaning method during the concentration process were studied. The results showed that with the increase of the concentration ratio, the membrane flux and desalination rate of the polyvinylidene fluoride (PVDF) hollow fiber membrane gradually decreased, while the conductivity of the produced water increased slowly. When the concentration ratio was up to 27 times, the membrane flux was 8.87 L/(m2·h), the salt rejection rate was 99.7%, and the water conductance was 26.6 μS/cm. The membrane distillation process was inhibited by the membrane fouling caused by the scaling of calcium and magnesium ions in mine water, and the inorganic salt deposits could not be removed by physical methods such as backwashing and ultrasonic cleaning. After 96 hours of continuous operation, the PVDF membrane flux reduced from 12.85 L/(m2·h) to 5.21 L/(m2·h). The pretreatment process of hardness removal had obvious influence on the calcium and magnesium scaling in the membrane distillation process. When the hardness removal rate exceeded 95%, the desalting rate and membrane flux attenuation of PVDF membrane were obviously weakened. The membrane fouling caused by the calcium and magnesium precipitation could be effectively removed by the citric acid cleaning agent. Under the optimized conditions of citric acid concentration of 0.87 mol/L, the cleaning temperature of 38 ℃ and the cleaning time of 40 min, the membrane cleaning efficiency could reach 99.5%. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to characterize the microscopic morphology and structure of the original film, the contaminated film and the film after chemical cleaning. The results showed that the deposited pollutants on the surface of the cleaned film were significantly reduced, but the surface morphology and microscopic structure were irreversibly changed. coal mine water water treatment membrane distillation membrane fouling membrane cleaning Geology Mining engineering. Metallurgy Jingfeng LI verfasserin aut Zhaofeng LIU verfasserin aut Zhiguo CAO verfasserin aut Ruimin HE verfasserin aut Wei BIAN verfasserin aut Shuqin LIU verfasserin aut In Meitan xuebao Editorial Office of Journal of China Coal Society, 2021 48(2023), 9, Seite 3494-3502 (DE-627)578540479 (DE-600)2452312-4 02539993 nnns volume:48 year:2023 number:9 pages:3494-3502 https://doi.org/10.13225/j.cnki.jccs.2022.1253 kostenfrei https://doaj.org/article/8b46cfd686f44d22b0f3bff9d3f4358e kostenfrei http://www.mtxb.com.cn/article/doi/10.13225/j.cnki.jccs.2022.1253 kostenfrei https://doaj.org/toc/0253-9993 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2817 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 48 2023 9 3494-3502
language	Chinese
source	In Meitan xuebao 48(2023), 9, Seite 3494-3502 volume:48 year:2023 number:9 pages:3494-3502
sourceStr	In Meitan xuebao 48(2023), 9, Seite 3494-3502 volume:48 year:2023 number:9 pages:3494-3502
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	coal mine water water treatment membrane distillation membrane fouling membrane cleaning Geology Mining engineering. Metallurgy
isfreeaccess_bool	true
container_title	Meitan xuebao
authorswithroles_txt_mv	Qiang GUO @@aut@@ Jingfeng LI @@aut@@ Zhaofeng LIU @@aut@@ Zhiguo CAO @@aut@@ Ruimin HE @@aut@@ Wei BIAN @@aut@@ Shuqin LIU @@aut@@
publishDateDaySort_date	2023-01-01T00:00:00Z
hierarchy_top_id	578540479
id	DOAJ099520370
language_de	chinesisch
fullrecord	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000naa a22002652 4500</leader><controlfield tag="001">DOAJ099520370</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20240414040736.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">240414s2023 xx \|\|\|\|\|o 00\| \|\|chi c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.13225/j.cnki.jccs.2022.1253</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)DOAJ099520370</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)DOAJ8b46cfd686f44d22b0f3bff9d3f4358e</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">chi</subfield></datafield><datafield tag="050" ind1=" " ind2="0"><subfield code="a">QE1-996.5</subfield></datafield><datafield tag="050" ind1=" " ind2="0"><subfield code="a">TN1-997</subfield></datafield><datafield tag="100" ind1="0" ind2=" "><subfield code="a">Qiang GUO</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Membrane distillation treatment of high-salinity mine water</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2023</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">The main coal producing areas in western China have the problems of dry climate and water shortage, and the mine water produced by coal mining generally has the characteristics of high salinity and high hardness. At present, the zero-discharge treatment of high-salinity mine water generally has the problems of complex process and high operating cost. In order to shorten the treatment process and improve the treatment efficiency, in this study, the vacuum membrane distillation technology was applied to replace the existing multi-stage reverse osmosis membrane concentration technology for the high-salinity mine water concentration and desalination treatment process. The high-salinity mine water after a lime-soda softening treatment was treated with different concentration ratios, and the membrane fouling mechanism and membrane cleaning method during the concentration process were studied. The results showed that with the increase of the concentration ratio, the membrane flux and desalination rate of the polyvinylidene fluoride (PVDF) hollow fiber membrane gradually decreased, while the conductivity of the produced water increased slowly. When the concentration ratio was up to 27 times, the membrane flux was 8.87 L/(m2·h), the salt rejection rate was 99.7%, and the water conductance was 26.6 μS/cm. The membrane distillation process was inhibited by the membrane fouling caused by the scaling of calcium and magnesium ions in mine water, and the inorganic salt deposits could not be removed by physical methods such as backwashing and ultrasonic cleaning. After 96 hours of continuous operation, the PVDF membrane flux reduced from 12.85 L/(m2·h) to 5.21 L/(m2·h). The pretreatment process of hardness removal had obvious influence on the calcium and magnesium scaling in the membrane distillation process. When the hardness removal rate exceeded 95%, the desalting rate and membrane flux attenuation of PVDF membrane were obviously weakened. The membrane fouling caused by the calcium and magnesium precipitation could be effectively removed by the citric acid cleaning agent. Under the optimized conditions of citric acid concentration of 0.87 mol/L, the cleaning temperature of 38 ℃ and the cleaning time of 40 min, the membrane cleaning efficiency could reach 99.5%. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to characterize the microscopic morphology and structure of the original film, the contaminated film and the film after chemical cleaning. 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callnumber-first	Q - Science
author	Qiang GUO
spellingShingle	Qiang GUO misc QE1-996.5 misc TN1-997 misc coal mine water misc water treatment misc membrane distillation misc membrane fouling misc membrane cleaning misc Geology misc Mining engineering. Metallurgy Membrane distillation treatment of high-salinity mine water
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topic_title	QE1-996.5 TN1-997 Membrane distillation treatment of high-salinity mine water coal mine water water treatment membrane distillation membrane fouling membrane cleaning
topic	misc QE1-996.5 misc TN1-997 misc coal mine water misc water treatment misc membrane distillation misc membrane fouling misc membrane cleaning misc Geology misc Mining engineering. Metallurgy
topic_unstemmed	misc QE1-996.5 misc TN1-997 misc coal mine water misc water treatment misc membrane distillation misc membrane fouling misc membrane cleaning misc Geology misc Mining engineering. Metallurgy
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title	Membrane distillation treatment of high-salinity mine water
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title_full	Membrane distillation treatment of high-salinity mine water
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author_browse	Qiang GUO Jingfeng LI Zhaofeng LIU Zhiguo CAO Ruimin HE Wei BIAN Shuqin LIU
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title_sort	membrane distillation treatment of high-salinity mine water
callnumber	QE1-996.5
title_auth	Membrane distillation treatment of high-salinity mine water
abstract	The main coal producing areas in western China have the problems of dry climate and water shortage, and the mine water produced by coal mining generally has the characteristics of high salinity and high hardness. At present, the zero-discharge treatment of high-salinity mine water generally has the problems of complex process and high operating cost. In order to shorten the treatment process and improve the treatment efficiency, in this study, the vacuum membrane distillation technology was applied to replace the existing multi-stage reverse osmosis membrane concentration technology for the high-salinity mine water concentration and desalination treatment process. The high-salinity mine water after a lime-soda softening treatment was treated with different concentration ratios, and the membrane fouling mechanism and membrane cleaning method during the concentration process were studied. The results showed that with the increase of the concentration ratio, the membrane flux and desalination rate of the polyvinylidene fluoride (PVDF) hollow fiber membrane gradually decreased, while the conductivity of the produced water increased slowly. When the concentration ratio was up to 27 times, the membrane flux was 8.87 L/(m2·h), the salt rejection rate was 99.7%, and the water conductance was 26.6 μS/cm. The membrane distillation process was inhibited by the membrane fouling caused by the scaling of calcium and magnesium ions in mine water, and the inorganic salt deposits could not be removed by physical methods such as backwashing and ultrasonic cleaning. After 96 hours of continuous operation, the PVDF membrane flux reduced from 12.85 L/(m2·h) to 5.21 L/(m2·h). The pretreatment process of hardness removal had obvious influence on the calcium and magnesium scaling in the membrane distillation process. When the hardness removal rate exceeded 95%, the desalting rate and membrane flux attenuation of PVDF membrane were obviously weakened. The membrane fouling caused by the calcium and magnesium precipitation could be effectively removed by the citric acid cleaning agent. Under the optimized conditions of citric acid concentration of 0.87 mol/L, the cleaning temperature of 38 ℃ and the cleaning time of 40 min, the membrane cleaning efficiency could reach 99.5%. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to characterize the microscopic morphology and structure of the original film, the contaminated film and the film after chemical cleaning. The results showed that the deposited pollutants on the surface of the cleaned film were significantly reduced, but the surface morphology and microscopic structure were irreversibly changed.
abstractGer	The main coal producing areas in western China have the problems of dry climate and water shortage, and the mine water produced by coal mining generally has the characteristics of high salinity and high hardness. At present, the zero-discharge treatment of high-salinity mine water generally has the problems of complex process and high operating cost. In order to shorten the treatment process and improve the treatment efficiency, in this study, the vacuum membrane distillation technology was applied to replace the existing multi-stage reverse osmosis membrane concentration technology for the high-salinity mine water concentration and desalination treatment process. The high-salinity mine water after a lime-soda softening treatment was treated with different concentration ratios, and the membrane fouling mechanism and membrane cleaning method during the concentration process were studied. The results showed that with the increase of the concentration ratio, the membrane flux and desalination rate of the polyvinylidene fluoride (PVDF) hollow fiber membrane gradually decreased, while the conductivity of the produced water increased slowly. When the concentration ratio was up to 27 times, the membrane flux was 8.87 L/(m2·h), the salt rejection rate was 99.7%, and the water conductance was 26.6 μS/cm. The membrane distillation process was inhibited by the membrane fouling caused by the scaling of calcium and magnesium ions in mine water, and the inorganic salt deposits could not be removed by physical methods such as backwashing and ultrasonic cleaning. After 96 hours of continuous operation, the PVDF membrane flux reduced from 12.85 L/(m2·h) to 5.21 L/(m2·h). The pretreatment process of hardness removal had obvious influence on the calcium and magnesium scaling in the membrane distillation process. When the hardness removal rate exceeded 95%, the desalting rate and membrane flux attenuation of PVDF membrane were obviously weakened. The membrane fouling caused by the calcium and magnesium precipitation could be effectively removed by the citric acid cleaning agent. Under the optimized conditions of citric acid concentration of 0.87 mol/L, the cleaning temperature of 38 ℃ and the cleaning time of 40 min, the membrane cleaning efficiency could reach 99.5%. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to characterize the microscopic morphology and structure of the original film, the contaminated film and the film after chemical cleaning. The results showed that the deposited pollutants on the surface of the cleaned film were significantly reduced, but the surface morphology and microscopic structure were irreversibly changed.
abstract_unstemmed	The main coal producing areas in western China have the problems of dry climate and water shortage, and the mine water produced by coal mining generally has the characteristics of high salinity and high hardness. At present, the zero-discharge treatment of high-salinity mine water generally has the problems of complex process and high operating cost. In order to shorten the treatment process and improve the treatment efficiency, in this study, the vacuum membrane distillation technology was applied to replace the existing multi-stage reverse osmosis membrane concentration technology for the high-salinity mine water concentration and desalination treatment process. The high-salinity mine water after a lime-soda softening treatment was treated with different concentration ratios, and the membrane fouling mechanism and membrane cleaning method during the concentration process were studied. The results showed that with the increase of the concentration ratio, the membrane flux and desalination rate of the polyvinylidene fluoride (PVDF) hollow fiber membrane gradually decreased, while the conductivity of the produced water increased slowly. When the concentration ratio was up to 27 times, the membrane flux was 8.87 L/(m2·h), the salt rejection rate was 99.7%, and the water conductance was 26.6 μS/cm. The membrane distillation process was inhibited by the membrane fouling caused by the scaling of calcium and magnesium ions in mine water, and the inorganic salt deposits could not be removed by physical methods such as backwashing and ultrasonic cleaning. After 96 hours of continuous operation, the PVDF membrane flux reduced from 12.85 L/(m2·h) to 5.21 L/(m2·h). The pretreatment process of hardness removal had obvious influence on the calcium and magnesium scaling in the membrane distillation process. When the hardness removal rate exceeded 95%, the desalting rate and membrane flux attenuation of PVDF membrane were obviously weakened. The membrane fouling caused by the calcium and magnesium precipitation could be effectively removed by the citric acid cleaning agent. Under the optimized conditions of citric acid concentration of 0.87 mol/L, the cleaning temperature of 38 ℃ and the cleaning time of 40 min, the membrane cleaning efficiency could reach 99.5%. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to characterize the microscopic morphology and structure of the original film, the contaminated film and the film after chemical cleaning. The results showed that the deposited pollutants on the surface of the cleaned film were significantly reduced, but the surface morphology and microscopic structure were irreversibly changed.
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title_short	Membrane distillation treatment of high-salinity mine water
url	https://doi.org/10.13225/j.cnki.jccs.2022.1253 https://doaj.org/article/8b46cfd686f44d22b0f3bff9d3f4358e http://www.mtxb.com.cn/article/doi/10.13225/j.cnki.jccs.2022.1253 https://doaj.org/toc/0253-9993
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