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| Effect of Dissolvable Humic Acid on Benzotriazole Sorption by Iron Oxide Coated Quartz Sands |
| Received:December 12, 2014 |
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| KeyWord:dissolvable humic acid;benzotriazole;iron oxide coated quartz sands(IOCQS);sorption |
| Author Name | Affiliation | E-mail | | ZHAO Xiao-li | School of Water Resources and Environment, China University of Geosciences(Beijing), Beijing 100083, China
Gas Production Engineering Research Institute, PetroChina Southwest Oil and Gas Field Company, Guanghan 618300, China | | | BI Er-ping | School of Water Resources and Environment, China University of Geosciences(Beijing), Beijing 100083, China | bi@cugb.edu.cn |
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| Abstract: |
| Dissolvable humic acid(DHA) plays an important role in sorption of pollutants in the environment. The effects of cation type and DHA concentration on sorption of DHA and benzotriazole(BTA) on iron oxide coated quartz sands(IOCQS) were studied using batch experiments. At the solution pH 6.0, electrostatic interaction plays an important role in the sorption of DHA by IOCQS. The isotherms of BTA sorption by IOCQS could be well described by Freundlich model. The effect of DHA on sorption of BTA was strongly determined by DHA concentration and electrolyte type. At 0~15.68 mg·L-1 of DHA concentration, DHA enhanced sorption of BTA on IOCQS in 0.01 mol·L-1 CaCl2 solution. Such enhancement was mainly resulted from cumulative sorption. Under different background electrolytes, the amount of adsorbed DHA was different, and the effect of DHA on BTA sorption by IOCQS was consequently different. |
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