Insight into the role of dissolved organic matter in sorption of sulfapyridine by semiarid soils

Environmental Science & Technology
Hai HahamBenny Chefetz

Abstract

Sorption-desorption behavior of sulfapyridine was studied with three distinct soil types low in organic carbon with or without the introduction of exogenous dissolved organic matter (DOM). Experiments with bulk soils yielded sorption coefficients equivalent to those obtained with soils richer in organic matter, indicating an important sorptive role for soil mineral matrices. Cointroduction of sulfapyridine with DOM significantly reduced sulfapyridine sorption. However, decreasing solution pH from ~9 to ~6 limited the effect of DOM and revealed the effect of ionic speciation of sulfapyridine on the sorption potential. Sulfapyridine sorption to soils precoated with DOM exhibited contrasting trends. Two of the coated soils exhibited decreased sorption of sulfapyridine probably due to blockage of sorption sites by DOM. Conversely, the third soil demonstrated cumulative adsorption of sulfapyridine. Precoating also enhanced sulfapyridine desorption, suggesting that sorption of sulfapyridine to mineral surfaces involves stronger chemisorptive binding as compared with interactions with sorbed DOM. The capacity of soil to sorb DOM as well as the chemical fractionation of DOM during sorption were found to significantly affect binding of ...Continue Reading

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Citations

Apr 23, 2014·Environmental Science & Technology·Myah GoldsteinBenny Chefetz
Jun 14, 2014·Bioresource Technology·Anushka Upamali RajapakshaYong Sik Ok
Feb 4, 2014·The Science of the Total Environment·Keity Margareth DorettoSusanne Rath
Dec 1, 2015·Environmental Science & Technology·Elizabeth L MillerJoel A Pedersen
Aug 9, 2015·The Science of the Total Environment·Xiaoqin WuJay Gan
May 6, 2015·Environmental Science and Pollution Research International·Lucia MicheliniRossella Ghisi
Aug 27, 2013·The Science of the Total Environment·M García-JaramilloM C Hermosín
Apr 29, 2014·Journal of Environmental Management·Meththika VithanageYong Sik Ok
Mar 4, 2015·Journal of Hazardous Materials·Anushka Upamali RajapakshaYong Sik Ok
Sep 13, 2014·Environmental Science and Pollution Research International·Mandu InyangXinde Cao
Aug 31, 2014·Environmental Science and Pollution Research International·Meththika VithanageYong Sik Ok
Sep 12, 2018·Environmental Science and Pollution Research International·Lin WuErping Bi
Apr 2, 2021·The Science of the Total Environment·Chubin ZhangStephen Sturzenbaum
Aug 14, 2020·Ecotoxicology and Environmental Safety·Lin WuErping Bi
Jan 20, 2020·The Science of the Total Environment·Yingna XingXijuan Chen

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