Predicting the effect of dissolved humic acid on sorption of benzotriazole to biochar
Abstract Dissolved organic matter plays a critical role in affecting sorption properties of biochar for organic contaminants. In this study, dissolved humic acid (DHA) as a representative of dissolved organic matter and oak sawdust-derived biochar as a sorbent were prepared and characterized. Roles...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Wu, Lin [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022 |
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| Schlagwörter: |
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| Anmerkung: |
© The Author(s) 2022 |
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| Übergeordnetes Werk: |
Enthalten in: Biochar - Heidelberg : Springer, 2019, 4(2022), 1 vom: 25. Feb. |
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| Übergeordnetes Werk: |
volume:4 ; year:2022 ; number:1 ; day:25 ; month:02 |
| Links: |
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| DOI / URN: |
10.1007/s42773-022-00134-5 |
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SPR046337733 |
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| 520 | |a Abstract Dissolved organic matter plays a critical role in affecting sorption properties of biochar for organic contaminants. In this study, dissolved humic acid (DHA) as a representative of dissolved organic matter and oak sawdust-derived biochar as a sorbent were prepared and characterized. Roles of DHA in sorption of benzotriazole (BTA), an emerging organic contaminant, to biochar in different electrolyte solutions were investigated. The results revealed the dual roles of DHA in BTA sorption to biochar. On the one hand, DHA can compete for sites and/or block pores available for BTA to inhibit the adsorption of BTA to biochar. On the other hand, the sorbed DHA on biochar can serve as additional partitioning phase to promote the partition of BTA. The finding was in accordance with the site energy distribution analysis of BTA sorption that the site energy of the highest occurring frequency in the DHA-BTA system was lower than that in the DHA-free system (3.41–10.4 versus 13.1–20.1 kJ $ mol^{−1} $). The variation in apparent BTA sorption to biochar affected by DHA was thus a combination of changes in both its partition and adsorption properties. A modified Dual-mode model including the aqueous concentration of DHA was proposed to predict the effect of DHA on BTA sorption to biochar in different electrolyte solutions, which showed good prediction performance with most BTA sorption coefficient (Kd, L $ g^{−1} $) deviations within 0.1 log unit. | ||
| 520 | |a Highlights A model was proposed to predict the effect of dissolved humic acid (DHA) on benzotriazole (BTA) sorption to biochar.The dual roles of DHA in promoting partition but inhibiting adsorption of BTA to biochar were revealed.Site energy distribution was introduced to verify the roles of DHA in BTA sorption to biochar. | ||
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10.1007/s42773-022-00134-5 doi (DE-627)SPR046337733 (SPR)s42773-022-00134-5-e DE-627 ger DE-627 rakwb eng Wu, Lin verfasserin aut Predicting the effect of dissolved humic acid on sorption of benzotriazole to biochar 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2022 Abstract Dissolved organic matter plays a critical role in affecting sorption properties of biochar for organic contaminants. In this study, dissolved humic acid (DHA) as a representative of dissolved organic matter and oak sawdust-derived biochar as a sorbent were prepared and characterized. Roles of DHA in sorption of benzotriazole (BTA), an emerging organic contaminant, to biochar in different electrolyte solutions were investigated. The results revealed the dual roles of DHA in BTA sorption to biochar. On the one hand, DHA can compete for sites and/or block pores available for BTA to inhibit the adsorption of BTA to biochar. On the other hand, the sorbed DHA on biochar can serve as additional partitioning phase to promote the partition of BTA. The finding was in accordance with the site energy distribution analysis of BTA sorption that the site energy of the highest occurring frequency in the DHA-BTA system was lower than that in the DHA-free system (3.41–10.4 versus 13.1–20.1 kJ $ mol^{−1} $). The variation in apparent BTA sorption to biochar affected by DHA was thus a combination of changes in both its partition and adsorption properties. A modified Dual-mode model including the aqueous concentration of DHA was proposed to predict the effect of DHA on BTA sorption to biochar in different electrolyte solutions, which showed good prediction performance with most BTA sorption coefficient (Kd, L $ g^{−1} $) deviations within 0.1 log unit. Highlights A model was proposed to predict the effect of dissolved humic acid (DHA) on benzotriazole (BTA) sorption to biochar.The dual roles of DHA in promoting partition but inhibiting adsorption of BTA to biochar were revealed.Site energy distribution was introduced to verify the roles of DHA in BTA sorption to biochar. Emerging organic contaminant (dpeaa)DE-He213 Black carbon (dpeaa)DE-He213 Dissolved organic matter (dpeaa)DE-He213 Sorption (dpeaa)DE-He213 Site energy distribution (dpeaa)DE-He213 Zhao, Xiaoli aut Bi, Erping (orcid)0000-0002-4292-0564 aut Enthalten in Biochar Heidelberg : Springer, 2019 4(2022), 1 vom: 25. Feb. (DE-627)1041201680 (DE-600)2951502-6 2524-7867 nnns volume:4 year:2022 number:1 day:25 month:02 https://dx.doi.org/10.1007/s42773-022-00134-5 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2014 GBV_ILN_2190 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_4367 GBV_ILN_4700 AR 4 2022 1 25 02 |
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10.1007/s42773-022-00134-5 doi (DE-627)SPR046337733 (SPR)s42773-022-00134-5-e DE-627 ger DE-627 rakwb eng Wu, Lin verfasserin aut Predicting the effect of dissolved humic acid on sorption of benzotriazole to biochar 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2022 Abstract Dissolved organic matter plays a critical role in affecting sorption properties of biochar for organic contaminants. In this study, dissolved humic acid (DHA) as a representative of dissolved organic matter and oak sawdust-derived biochar as a sorbent were prepared and characterized. Roles of DHA in sorption of benzotriazole (BTA), an emerging organic contaminant, to biochar in different electrolyte solutions were investigated. The results revealed the dual roles of DHA in BTA sorption to biochar. On the one hand, DHA can compete for sites and/or block pores available for BTA to inhibit the adsorption of BTA to biochar. On the other hand, the sorbed DHA on biochar can serve as additional partitioning phase to promote the partition of BTA. The finding was in accordance with the site energy distribution analysis of BTA sorption that the site energy of the highest occurring frequency in the DHA-BTA system was lower than that in the DHA-free system (3.41–10.4 versus 13.1–20.1 kJ $ mol^{−1} $). The variation in apparent BTA sorption to biochar affected by DHA was thus a combination of changes in both its partition and adsorption properties. A modified Dual-mode model including the aqueous concentration of DHA was proposed to predict the effect of DHA on BTA sorption to biochar in different electrolyte solutions, which showed good prediction performance with most BTA sorption coefficient (Kd, L $ g^{−1} $) deviations within 0.1 log unit. Highlights A model was proposed to predict the effect of dissolved humic acid (DHA) on benzotriazole (BTA) sorption to biochar.The dual roles of DHA in promoting partition but inhibiting adsorption of BTA to biochar were revealed.Site energy distribution was introduced to verify the roles of DHA in BTA sorption to biochar. Emerging organic contaminant (dpeaa)DE-He213 Black carbon (dpeaa)DE-He213 Dissolved organic matter (dpeaa)DE-He213 Sorption (dpeaa)DE-He213 Site energy distribution (dpeaa)DE-He213 Zhao, Xiaoli aut Bi, Erping (orcid)0000-0002-4292-0564 aut Enthalten in Biochar Heidelberg : Springer, 2019 4(2022), 1 vom: 25. Feb. (DE-627)1041201680 (DE-600)2951502-6 2524-7867 nnns volume:4 year:2022 number:1 day:25 month:02 https://dx.doi.org/10.1007/s42773-022-00134-5 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2014 GBV_ILN_2190 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_4367 GBV_ILN_4700 AR 4 2022 1 25 02 |
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10.1007/s42773-022-00134-5 doi (DE-627)SPR046337733 (SPR)s42773-022-00134-5-e DE-627 ger DE-627 rakwb eng Wu, Lin verfasserin aut Predicting the effect of dissolved humic acid on sorption of benzotriazole to biochar 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2022 Abstract Dissolved organic matter plays a critical role in affecting sorption properties of biochar for organic contaminants. In this study, dissolved humic acid (DHA) as a representative of dissolved organic matter and oak sawdust-derived biochar as a sorbent were prepared and characterized. Roles of DHA in sorption of benzotriazole (BTA), an emerging organic contaminant, to biochar in different electrolyte solutions were investigated. The results revealed the dual roles of DHA in BTA sorption to biochar. On the one hand, DHA can compete for sites and/or block pores available for BTA to inhibit the adsorption of BTA to biochar. On the other hand, the sorbed DHA on biochar can serve as additional partitioning phase to promote the partition of BTA. The finding was in accordance with the site energy distribution analysis of BTA sorption that the site energy of the highest occurring frequency in the DHA-BTA system was lower than that in the DHA-free system (3.41–10.4 versus 13.1–20.1 kJ $ mol^{−1} $). The variation in apparent BTA sorption to biochar affected by DHA was thus a combination of changes in both its partition and adsorption properties. A modified Dual-mode model including the aqueous concentration of DHA was proposed to predict the effect of DHA on BTA sorption to biochar in different electrolyte solutions, which showed good prediction performance with most BTA sorption coefficient (Kd, L $ g^{−1} $) deviations within 0.1 log unit. Highlights A model was proposed to predict the effect of dissolved humic acid (DHA) on benzotriazole (BTA) sorption to biochar.The dual roles of DHA in promoting partition but inhibiting adsorption of BTA to biochar were revealed.Site energy distribution was introduced to verify the roles of DHA in BTA sorption to biochar. Emerging organic contaminant (dpeaa)DE-He213 Black carbon (dpeaa)DE-He213 Dissolved organic matter (dpeaa)DE-He213 Sorption (dpeaa)DE-He213 Site energy distribution (dpeaa)DE-He213 Zhao, Xiaoli aut Bi, Erping (orcid)0000-0002-4292-0564 aut Enthalten in Biochar Heidelberg : Springer, 2019 4(2022), 1 vom: 25. Feb. (DE-627)1041201680 (DE-600)2951502-6 2524-7867 nnns volume:4 year:2022 number:1 day:25 month:02 https://dx.doi.org/10.1007/s42773-022-00134-5 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2014 GBV_ILN_2190 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_4367 GBV_ILN_4700 AR 4 2022 1 25 02 |
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10.1007/s42773-022-00134-5 doi (DE-627)SPR046337733 (SPR)s42773-022-00134-5-e DE-627 ger DE-627 rakwb eng Wu, Lin verfasserin aut Predicting the effect of dissolved humic acid on sorption of benzotriazole to biochar 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2022 Abstract Dissolved organic matter plays a critical role in affecting sorption properties of biochar for organic contaminants. In this study, dissolved humic acid (DHA) as a representative of dissolved organic matter and oak sawdust-derived biochar as a sorbent were prepared and characterized. Roles of DHA in sorption of benzotriazole (BTA), an emerging organic contaminant, to biochar in different electrolyte solutions were investigated. The results revealed the dual roles of DHA in BTA sorption to biochar. On the one hand, DHA can compete for sites and/or block pores available for BTA to inhibit the adsorption of BTA to biochar. On the other hand, the sorbed DHA on biochar can serve as additional partitioning phase to promote the partition of BTA. The finding was in accordance with the site energy distribution analysis of BTA sorption that the site energy of the highest occurring frequency in the DHA-BTA system was lower than that in the DHA-free system (3.41–10.4 versus 13.1–20.1 kJ $ mol^{−1} $). The variation in apparent BTA sorption to biochar affected by DHA was thus a combination of changes in both its partition and adsorption properties. A modified Dual-mode model including the aqueous concentration of DHA was proposed to predict the effect of DHA on BTA sorption to biochar in different electrolyte solutions, which showed good prediction performance with most BTA sorption coefficient (Kd, L $ g^{−1} $) deviations within 0.1 log unit. Highlights A model was proposed to predict the effect of dissolved humic acid (DHA) on benzotriazole (BTA) sorption to biochar.The dual roles of DHA in promoting partition but inhibiting adsorption of BTA to biochar were revealed.Site energy distribution was introduced to verify the roles of DHA in BTA sorption to biochar. Emerging organic contaminant (dpeaa)DE-He213 Black carbon (dpeaa)DE-He213 Dissolved organic matter (dpeaa)DE-He213 Sorption (dpeaa)DE-He213 Site energy distribution (dpeaa)DE-He213 Zhao, Xiaoli aut Bi, Erping (orcid)0000-0002-4292-0564 aut Enthalten in Biochar Heidelberg : Springer, 2019 4(2022), 1 vom: 25. Feb. (DE-627)1041201680 (DE-600)2951502-6 2524-7867 nnns volume:4 year:2022 number:1 day:25 month:02 https://dx.doi.org/10.1007/s42773-022-00134-5 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2014 GBV_ILN_2190 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_4367 GBV_ILN_4700 AR 4 2022 1 25 02 |
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10.1007/s42773-022-00134-5 doi (DE-627)SPR046337733 (SPR)s42773-022-00134-5-e DE-627 ger DE-627 rakwb eng Wu, Lin verfasserin aut Predicting the effect of dissolved humic acid on sorption of benzotriazole to biochar 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2022 Abstract Dissolved organic matter plays a critical role in affecting sorption properties of biochar for organic contaminants. In this study, dissolved humic acid (DHA) as a representative of dissolved organic matter and oak sawdust-derived biochar as a sorbent were prepared and characterized. Roles of DHA in sorption of benzotriazole (BTA), an emerging organic contaminant, to biochar in different electrolyte solutions were investigated. The results revealed the dual roles of DHA in BTA sorption to biochar. On the one hand, DHA can compete for sites and/or block pores available for BTA to inhibit the adsorption of BTA to biochar. On the other hand, the sorbed DHA on biochar can serve as additional partitioning phase to promote the partition of BTA. The finding was in accordance with the site energy distribution analysis of BTA sorption that the site energy of the highest occurring frequency in the DHA-BTA system was lower than that in the DHA-free system (3.41–10.4 versus 13.1–20.1 kJ $ mol^{−1} $). The variation in apparent BTA sorption to biochar affected by DHA was thus a combination of changes in both its partition and adsorption properties. A modified Dual-mode model including the aqueous concentration of DHA was proposed to predict the effect of DHA on BTA sorption to biochar in different electrolyte solutions, which showed good prediction performance with most BTA sorption coefficient (Kd, L $ g^{−1} $) deviations within 0.1 log unit. Highlights A model was proposed to predict the effect of dissolved humic acid (DHA) on benzotriazole (BTA) sorption to biochar.The dual roles of DHA in promoting partition but inhibiting adsorption of BTA to biochar were revealed.Site energy distribution was introduced to verify the roles of DHA in BTA sorption to biochar. Emerging organic contaminant (dpeaa)DE-He213 Black carbon (dpeaa)DE-He213 Dissolved organic matter (dpeaa)DE-He213 Sorption (dpeaa)DE-He213 Site energy distribution (dpeaa)DE-He213 Zhao, Xiaoli aut Bi, Erping (orcid)0000-0002-4292-0564 aut Enthalten in Biochar Heidelberg : Springer, 2019 4(2022), 1 vom: 25. Feb. (DE-627)1041201680 (DE-600)2951502-6 2524-7867 nnns volume:4 year:2022 number:1 day:25 month:02 https://dx.doi.org/10.1007/s42773-022-00134-5 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2014 GBV_ILN_2190 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_4367 GBV_ILN_4700 AR 4 2022 1 25 02 |
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Predicting the effect of dissolved humic acid on sorption of benzotriazole to biochar |
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Abstract Dissolved organic matter plays a critical role in affecting sorption properties of biochar for organic contaminants. In this study, dissolved humic acid (DHA) as a representative of dissolved organic matter and oak sawdust-derived biochar as a sorbent were prepared and characterized. Roles of DHA in sorption of benzotriazole (BTA), an emerging organic contaminant, to biochar in different electrolyte solutions were investigated. The results revealed the dual roles of DHA in BTA sorption to biochar. On the one hand, DHA can compete for sites and/or block pores available for BTA to inhibit the adsorption of BTA to biochar. On the other hand, the sorbed DHA on biochar can serve as additional partitioning phase to promote the partition of BTA. The finding was in accordance with the site energy distribution analysis of BTA sorption that the site energy of the highest occurring frequency in the DHA-BTA system was lower than that in the DHA-free system (3.41–10.4 versus 13.1–20.1 kJ $ mol^{−1} $). The variation in apparent BTA sorption to biochar affected by DHA was thus a combination of changes in both its partition and adsorption properties. A modified Dual-mode model including the aqueous concentration of DHA was proposed to predict the effect of DHA on BTA sorption to biochar in different electrolyte solutions, which showed good prediction performance with most BTA sorption coefficient (Kd, L $ g^{−1} $) deviations within 0.1 log unit. Highlights A model was proposed to predict the effect of dissolved humic acid (DHA) on benzotriazole (BTA) sorption to biochar.The dual roles of DHA in promoting partition but inhibiting adsorption of BTA to biochar were revealed.Site energy distribution was introduced to verify the roles of DHA in BTA sorption to biochar. © The Author(s) 2022 |
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Abstract Dissolved organic matter plays a critical role in affecting sorption properties of biochar for organic contaminants. In this study, dissolved humic acid (DHA) as a representative of dissolved organic matter and oak sawdust-derived biochar as a sorbent were prepared and characterized. Roles of DHA in sorption of benzotriazole (BTA), an emerging organic contaminant, to biochar in different electrolyte solutions were investigated. The results revealed the dual roles of DHA in BTA sorption to biochar. On the one hand, DHA can compete for sites and/or block pores available for BTA to inhibit the adsorption of BTA to biochar. On the other hand, the sorbed DHA on biochar can serve as additional partitioning phase to promote the partition of BTA. The finding was in accordance with the site energy distribution analysis of BTA sorption that the site energy of the highest occurring frequency in the DHA-BTA system was lower than that in the DHA-free system (3.41–10.4 versus 13.1–20.1 kJ $ mol^{−1} $). The variation in apparent BTA sorption to biochar affected by DHA was thus a combination of changes in both its partition and adsorption properties. A modified Dual-mode model including the aqueous concentration of DHA was proposed to predict the effect of DHA on BTA sorption to biochar in different electrolyte solutions, which showed good prediction performance with most BTA sorption coefficient (Kd, L $ g^{−1} $) deviations within 0.1 log unit. Highlights A model was proposed to predict the effect of dissolved humic acid (DHA) on benzotriazole (BTA) sorption to biochar.The dual roles of DHA in promoting partition but inhibiting adsorption of BTA to biochar were revealed.Site energy distribution was introduced to verify the roles of DHA in BTA sorption to biochar. © The Author(s) 2022 |
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Abstract Dissolved organic matter plays a critical role in affecting sorption properties of biochar for organic contaminants. In this study, dissolved humic acid (DHA) as a representative of dissolved organic matter and oak sawdust-derived biochar as a sorbent were prepared and characterized. Roles of DHA in sorption of benzotriazole (BTA), an emerging organic contaminant, to biochar in different electrolyte solutions were investigated. The results revealed the dual roles of DHA in BTA sorption to biochar. On the one hand, DHA can compete for sites and/or block pores available for BTA to inhibit the adsorption of BTA to biochar. On the other hand, the sorbed DHA on biochar can serve as additional partitioning phase to promote the partition of BTA. The finding was in accordance with the site energy distribution analysis of BTA sorption that the site energy of the highest occurring frequency in the DHA-BTA system was lower than that in the DHA-free system (3.41–10.4 versus 13.1–20.1 kJ $ mol^{−1} $). The variation in apparent BTA sorption to biochar affected by DHA was thus a combination of changes in both its partition and adsorption properties. A modified Dual-mode model including the aqueous concentration of DHA was proposed to predict the effect of DHA on BTA sorption to biochar in different electrolyte solutions, which showed good prediction performance with most BTA sorption coefficient (Kd, L $ g^{−1} $) deviations within 0.1 log unit. Highlights A model was proposed to predict the effect of dissolved humic acid (DHA) on benzotriazole (BTA) sorption to biochar.The dual roles of DHA in promoting partition but inhibiting adsorption of BTA to biochar were revealed.Site energy distribution was introduced to verify the roles of DHA in BTA sorption to biochar. © The Author(s) 2022 |
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The variation in apparent BTA sorption to biochar affected by DHA was thus a combination of changes in both its partition and adsorption properties. 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