Photodegradation of chromophoric dissolved organic matters in the water of Lake Dianchi, China

Abstract Water samples were taken from Lake Dianchi, on the Yungui Plateau of southwest China, and experiments were conducted to simulate the photochemical degradation characteristic of chromophoric dissolved organic matter (CDOM) in the lake water. Three groups of experiments under different light...
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Gespeichert in:

Autor*in:	Zhang, Yuan [verfasserIn] Hu, Chunming Yu, Tao

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2014

Schlagwörter:	chromophoric dissolved organic matter photodegradation ultraviolet radiation dissolved organic carbon

Anmerkung:	© Higher Education Press and Springer-Verlag Berlin Heidelberg 2014

Übergeordnetes Werk:	Enthalten in: Frontiers of environmental science & engineering in China - Beijing : Higher Education Press, 2007, 9(2014), 4 vom: 20. März, Seite 575-582
Übergeordnetes Werk:	volume:9 ; year:2014 ; number:4 ; day:20 ; month:03 ; pages:575-582

Links:	Volltext

DOI / URN:	10.1007/s11783-014-0664-y

Katalog-ID:	SPR02239737X

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520			\|a Abstract Water samples were taken from Lake Dianchi, on the Yungui Plateau of southwest China, and experiments were conducted to simulate the photochemical degradation characteristic of chromophoric dissolved organic matter (CDOM) in the lake water. Three groups of experiments under different light conditions: ultraviolet (UV) light, visible light, and dark, were done and variations of fluorescence properties, UV absorbance, and dissolved organic carbon (DOC) concentrations during the experiments were analyzed to study the photodegradation process of CDOM with time. The result showed that light irradiation led to significant photochemical degradation of CDOM, resulting in changes in florescent properties, absorbance losses, decreases in aromaticity and average molecular weight, as well as decline in DOC concentration in the water. It was also observed that UV irradiation had greater effect than visible light did. However, various fluorophores had different sensitivities to the same irradiation condition, that is, protein — like fluorophore at the low excitation wavelengths is more sensitive to UV irradiation than the other fluorophores, and is more readily to undergo photo — degradation. In addition, visible light irradiation did not have significant impact on DOC in the water, with DOC concentration decrease by 5.57%–59.9% during the experiment time. These results may provide new knowledge on the environment behavior of CDOM in the water of Lake Dianchi.
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allfields	10.1007/s11783-014-0664-y doi (DE-627)SPR02239737X (SPR)s11783-014-0664-y-e DE-627 ger DE-627 rakwb eng Zhang, Yuan verfasserin aut Photodegradation of chromophoric dissolved organic matters in the water of Lake Dianchi, China 2014 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Higher Education Press and Springer-Verlag Berlin Heidelberg 2014 Abstract Water samples were taken from Lake Dianchi, on the Yungui Plateau of southwest China, and experiments were conducted to simulate the photochemical degradation characteristic of chromophoric dissolved organic matter (CDOM) in the lake water. Three groups of experiments under different light conditions: ultraviolet (UV) light, visible light, and dark, were done and variations of fluorescence properties, UV absorbance, and dissolved organic carbon (DOC) concentrations during the experiments were analyzed to study the photodegradation process of CDOM with time. The result showed that light irradiation led to significant photochemical degradation of CDOM, resulting in changes in florescent properties, absorbance losses, decreases in aromaticity and average molecular weight, as well as decline in DOC concentration in the water. It was also observed that UV irradiation had greater effect than visible light did. However, various fluorophores had different sensitivities to the same irradiation condition, that is, protein — like fluorophore at the low excitation wavelengths is more sensitive to UV irradiation than the other fluorophores, and is more readily to undergo photo — degradation. In addition, visible light irradiation did not have significant impact on DOC in the water, with DOC concentration decrease by 5.57%–59.9% during the experiment time. These results may provide new knowledge on the environment behavior of CDOM in the water of Lake Dianchi. chromophoric dissolved organic matter (dpeaa)DE-He213 photodegradation (dpeaa)DE-He213 ultraviolet radiation (dpeaa)DE-He213 dissolved organic carbon (dpeaa)DE-He213 Hu, Chunming aut Yu, Tao aut Enthalten in Frontiers of environmental science & engineering in China Beijing : Higher Education Press, 2007 9(2014), 4 vom: 20. März, Seite 575-582 (DE-627)545787661 (DE-600)2388869-6 1673-7520 nnns volume:9 year:2014 number:4 day:20 month:03 pages:575-582 https://dx.doi.org/10.1007/s11783-014-0664-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER 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_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2059 GBV_ILN_2064 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 AR 9 2014 4 20 03 575-582
spelling	10.1007/s11783-014-0664-y doi (DE-627)SPR02239737X (SPR)s11783-014-0664-y-e DE-627 ger DE-627 rakwb eng Zhang, Yuan verfasserin aut Photodegradation of chromophoric dissolved organic matters in the water of Lake Dianchi, China 2014 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Higher Education Press and Springer-Verlag Berlin Heidelberg 2014 Abstract Water samples were taken from Lake Dianchi, on the Yungui Plateau of southwest China, and experiments were conducted to simulate the photochemical degradation characteristic of chromophoric dissolved organic matter (CDOM) in the lake water. Three groups of experiments under different light conditions: ultraviolet (UV) light, visible light, and dark, were done and variations of fluorescence properties, UV absorbance, and dissolved organic carbon (DOC) concentrations during the experiments were analyzed to study the photodegradation process of CDOM with time. The result showed that light irradiation led to significant photochemical degradation of CDOM, resulting in changes in florescent properties, absorbance losses, decreases in aromaticity and average molecular weight, as well as decline in DOC concentration in the water. It was also observed that UV irradiation had greater effect than visible light did. However, various fluorophores had different sensitivities to the same irradiation condition, that is, protein — like fluorophore at the low excitation wavelengths is more sensitive to UV irradiation than the other fluorophores, and is more readily to undergo photo — degradation. In addition, visible light irradiation did not have significant impact on DOC in the water, with DOC concentration decrease by 5.57%–59.9% during the experiment time. These results may provide new knowledge on the environment behavior of CDOM in the water of Lake Dianchi. chromophoric dissolved organic matter (dpeaa)DE-He213 photodegradation (dpeaa)DE-He213 ultraviolet radiation (dpeaa)DE-He213 dissolved organic carbon (dpeaa)DE-He213 Hu, Chunming aut Yu, Tao aut Enthalten in Frontiers of environmental science & engineering in China Beijing : Higher Education Press, 2007 9(2014), 4 vom: 20. März, Seite 575-582 (DE-627)545787661 (DE-600)2388869-6 1673-7520 nnns volume:9 year:2014 number:4 day:20 month:03 pages:575-582 https://dx.doi.org/10.1007/s11783-014-0664-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER 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_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2059 GBV_ILN_2064 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 AR 9 2014 4 20 03 575-582
allfields_unstemmed	10.1007/s11783-014-0664-y doi (DE-627)SPR02239737X (SPR)s11783-014-0664-y-e DE-627 ger DE-627 rakwb eng Zhang, Yuan verfasserin aut Photodegradation of chromophoric dissolved organic matters in the water of Lake Dianchi, China 2014 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Higher Education Press and Springer-Verlag Berlin Heidelberg 2014 Abstract Water samples were taken from Lake Dianchi, on the Yungui Plateau of southwest China, and experiments were conducted to simulate the photochemical degradation characteristic of chromophoric dissolved organic matter (CDOM) in the lake water. Three groups of experiments under different light conditions: ultraviolet (UV) light, visible light, and dark, were done and variations of fluorescence properties, UV absorbance, and dissolved organic carbon (DOC) concentrations during the experiments were analyzed to study the photodegradation process of CDOM with time. The result showed that light irradiation led to significant photochemical degradation of CDOM, resulting in changes in florescent properties, absorbance losses, decreases in aromaticity and average molecular weight, as well as decline in DOC concentration in the water. It was also observed that UV irradiation had greater effect than visible light did. However, various fluorophores had different sensitivities to the same irradiation condition, that is, protein — like fluorophore at the low excitation wavelengths is more sensitive to UV irradiation than the other fluorophores, and is more readily to undergo photo — degradation. In addition, visible light irradiation did not have significant impact on DOC in the water, with DOC concentration decrease by 5.57%–59.9% during the experiment time. These results may provide new knowledge on the environment behavior of CDOM in the water of Lake Dianchi. chromophoric dissolved organic matter (dpeaa)DE-He213 photodegradation (dpeaa)DE-He213 ultraviolet radiation (dpeaa)DE-He213 dissolved organic carbon (dpeaa)DE-He213 Hu, Chunming aut Yu, Tao aut Enthalten in Frontiers of environmental science & engineering in China Beijing : Higher Education Press, 2007 9(2014), 4 vom: 20. März, Seite 575-582 (DE-627)545787661 (DE-600)2388869-6 1673-7520 nnns volume:9 year:2014 number:4 day:20 month:03 pages:575-582 https://dx.doi.org/10.1007/s11783-014-0664-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER 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_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2059 GBV_ILN_2064 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 AR 9 2014 4 20 03 575-582
allfieldsGer	10.1007/s11783-014-0664-y doi (DE-627)SPR02239737X (SPR)s11783-014-0664-y-e DE-627 ger DE-627 rakwb eng Zhang, Yuan verfasserin aut Photodegradation of chromophoric dissolved organic matters in the water of Lake Dianchi, China 2014 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Higher Education Press and Springer-Verlag Berlin Heidelberg 2014 Abstract Water samples were taken from Lake Dianchi, on the Yungui Plateau of southwest China, and experiments were conducted to simulate the photochemical degradation characteristic of chromophoric dissolved organic matter (CDOM) in the lake water. Three groups of experiments under different light conditions: ultraviolet (UV) light, visible light, and dark, were done and variations of fluorescence properties, UV absorbance, and dissolved organic carbon (DOC) concentrations during the experiments were analyzed to study the photodegradation process of CDOM with time. The result showed that light irradiation led to significant photochemical degradation of CDOM, resulting in changes in florescent properties, absorbance losses, decreases in aromaticity and average molecular weight, as well as decline in DOC concentration in the water. It was also observed that UV irradiation had greater effect than visible light did. However, various fluorophores had different sensitivities to the same irradiation condition, that is, protein — like fluorophore at the low excitation wavelengths is more sensitive to UV irradiation than the other fluorophores, and is more readily to undergo photo — degradation. In addition, visible light irradiation did not have significant impact on DOC in the water, with DOC concentration decrease by 5.57%–59.9% during the experiment time. These results may provide new knowledge on the environment behavior of CDOM in the water of Lake Dianchi. chromophoric dissolved organic matter (dpeaa)DE-He213 photodegradation (dpeaa)DE-He213 ultraviolet radiation (dpeaa)DE-He213 dissolved organic carbon (dpeaa)DE-He213 Hu, Chunming aut Yu, Tao aut Enthalten in Frontiers of environmental science & engineering in China Beijing : Higher Education Press, 2007 9(2014), 4 vom: 20. März, Seite 575-582 (DE-627)545787661 (DE-600)2388869-6 1673-7520 nnns volume:9 year:2014 number:4 day:20 month:03 pages:575-582 https://dx.doi.org/10.1007/s11783-014-0664-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER 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_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2059 GBV_ILN_2064 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 AR 9 2014 4 20 03 575-582
allfieldsSound	10.1007/s11783-014-0664-y doi (DE-627)SPR02239737X (SPR)s11783-014-0664-y-e DE-627 ger DE-627 rakwb eng Zhang, Yuan verfasserin aut Photodegradation of chromophoric dissolved organic matters in the water of Lake Dianchi, China 2014 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Higher Education Press and Springer-Verlag Berlin Heidelberg 2014 Abstract Water samples were taken from Lake Dianchi, on the Yungui Plateau of southwest China, and experiments were conducted to simulate the photochemical degradation characteristic of chromophoric dissolved organic matter (CDOM) in the lake water. Three groups of experiments under different light conditions: ultraviolet (UV) light, visible light, and dark, were done and variations of fluorescence properties, UV absorbance, and dissolved organic carbon (DOC) concentrations during the experiments were analyzed to study the photodegradation process of CDOM with time. The result showed that light irradiation led to significant photochemical degradation of CDOM, resulting in changes in florescent properties, absorbance losses, decreases in aromaticity and average molecular weight, as well as decline in DOC concentration in the water. It was also observed that UV irradiation had greater effect than visible light did. However, various fluorophores had different sensitivities to the same irradiation condition, that is, protein — like fluorophore at the low excitation wavelengths is more sensitive to UV irradiation than the other fluorophores, and is more readily to undergo photo — degradation. In addition, visible light irradiation did not have significant impact on DOC in the water, with DOC concentration decrease by 5.57%–59.9% during the experiment time. These results may provide new knowledge on the environment behavior of CDOM in the water of Lake Dianchi. chromophoric dissolved organic matter (dpeaa)DE-He213 photodegradation (dpeaa)DE-He213 ultraviolet radiation (dpeaa)DE-He213 dissolved organic carbon (dpeaa)DE-He213 Hu, Chunming aut Yu, Tao aut Enthalten in Frontiers of environmental science & engineering in China Beijing : Higher Education Press, 2007 9(2014), 4 vom: 20. März, Seite 575-582 (DE-627)545787661 (DE-600)2388869-6 1673-7520 nnns volume:9 year:2014 number:4 day:20 month:03 pages:575-582 https://dx.doi.org/10.1007/s11783-014-0664-y lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER 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_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2059 GBV_ILN_2064 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 AR 9 2014 4 20 03 575-582
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author	Zhang, Yuan
spellingShingle	Zhang, Yuan misc chromophoric dissolved organic matter misc photodegradation misc ultraviolet radiation misc dissolved organic carbon Photodegradation of chromophoric dissolved organic matters in the water of Lake Dianchi, China
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topic_title	Photodegradation of chromophoric dissolved organic matters in the water of Lake Dianchi, China chromophoric dissolved organic matter (dpeaa)DE-He213 photodegradation (dpeaa)DE-He213 ultraviolet radiation (dpeaa)DE-He213 dissolved organic carbon (dpeaa)DE-He213
topic	misc chromophoric dissolved organic matter misc photodegradation misc ultraviolet radiation misc dissolved organic carbon
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title	Photodegradation of chromophoric dissolved organic matters in the water of Lake Dianchi, China
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title_full	Photodegradation of chromophoric dissolved organic matters in the water of Lake Dianchi, China
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title_sort	photodegradation of chromophoric dissolved organic matters in the water of lake dianchi, china
title_auth	Photodegradation of chromophoric dissolved organic matters in the water of Lake Dianchi, China
abstract	Abstract Water samples were taken from Lake Dianchi, on the Yungui Plateau of southwest China, and experiments were conducted to simulate the photochemical degradation characteristic of chromophoric dissolved organic matter (CDOM) in the lake water. Three groups of experiments under different light conditions: ultraviolet (UV) light, visible light, and dark, were done and variations of fluorescence properties, UV absorbance, and dissolved organic carbon (DOC) concentrations during the experiments were analyzed to study the photodegradation process of CDOM with time. The result showed that light irradiation led to significant photochemical degradation of CDOM, resulting in changes in florescent properties, absorbance losses, decreases in aromaticity and average molecular weight, as well as decline in DOC concentration in the water. It was also observed that UV irradiation had greater effect than visible light did. However, various fluorophores had different sensitivities to the same irradiation condition, that is, protein — like fluorophore at the low excitation wavelengths is more sensitive to UV irradiation than the other fluorophores, and is more readily to undergo photo — degradation. In addition, visible light irradiation did not have significant impact on DOC in the water, with DOC concentration decrease by 5.57%–59.9% during the experiment time. These results may provide new knowledge on the environment behavior of CDOM in the water of Lake Dianchi. © Higher Education Press and Springer-Verlag Berlin Heidelberg 2014
abstractGer	Abstract Water samples were taken from Lake Dianchi, on the Yungui Plateau of southwest China, and experiments were conducted to simulate the photochemical degradation characteristic of chromophoric dissolved organic matter (CDOM) in the lake water. Three groups of experiments under different light conditions: ultraviolet (UV) light, visible light, and dark, were done and variations of fluorescence properties, UV absorbance, and dissolved organic carbon (DOC) concentrations during the experiments were analyzed to study the photodegradation process of CDOM with time. The result showed that light irradiation led to significant photochemical degradation of CDOM, resulting in changes in florescent properties, absorbance losses, decreases in aromaticity and average molecular weight, as well as decline in DOC concentration in the water. It was also observed that UV irradiation had greater effect than visible light did. However, various fluorophores had different sensitivities to the same irradiation condition, that is, protein — like fluorophore at the low excitation wavelengths is more sensitive to UV irradiation than the other fluorophores, and is more readily to undergo photo — degradation. In addition, visible light irradiation did not have significant impact on DOC in the water, with DOC concentration decrease by 5.57%–59.9% during the experiment time. These results may provide new knowledge on the environment behavior of CDOM in the water of Lake Dianchi. © Higher Education Press and Springer-Verlag Berlin Heidelberg 2014
abstract_unstemmed	Abstract Water samples were taken from Lake Dianchi, on the Yungui Plateau of southwest China, and experiments were conducted to simulate the photochemical degradation characteristic of chromophoric dissolved organic matter (CDOM) in the lake water. Three groups of experiments under different light conditions: ultraviolet (UV) light, visible light, and dark, were done and variations of fluorescence properties, UV absorbance, and dissolved organic carbon (DOC) concentrations during the experiments were analyzed to study the photodegradation process of CDOM with time. The result showed that light irradiation led to significant photochemical degradation of CDOM, resulting in changes in florescent properties, absorbance losses, decreases in aromaticity and average molecular weight, as well as decline in DOC concentration in the water. It was also observed that UV irradiation had greater effect than visible light did. However, various fluorophores had different sensitivities to the same irradiation condition, that is, protein — like fluorophore at the low excitation wavelengths is more sensitive to UV irradiation than the other fluorophores, and is more readily to undergo photo — degradation. In addition, visible light irradiation did not have significant impact on DOC in the water, with DOC concentration decrease by 5.57%–59.9% during the experiment time. These results may provide new knowledge on the environment behavior of CDOM in the water of Lake Dianchi. © Higher Education Press and Springer-Verlag Berlin Heidelberg 2014
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title_short	Photodegradation of chromophoric dissolved organic matters in the water of Lake Dianchi, China
url	https://dx.doi.org/10.1007/s11783-014-0664-y
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In addition, visible light irradiation did not have significant impact on DOC in the water, with DOC concentration decrease by 5.57%–59.9% during the experiment time. 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Photodegradation of chromophoric dissolved organic matters in the water of Lake Dianchi, China

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