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Sorption and cosorption of organic contaminant on surfactant-modified soils |
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| Authors: | Gao B Wang X Zhao J Sheng G |
| Institution: | a Department of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210093, People's Republic of China b Department of Chemistry, Northwest University, Xian 710069, People's Republic of China c Department of Crop and Soil Sciences, Michigan State University, East Lansing, MI 48824, USA |
| Abstract: | Three kinds of soils were modified with the cationic surfactants, hexadecyltrimethylammonium (HDTMA) bromide and tetramethylammonium (TMA) bromide to increase their sorptive capabilities. Sorption of chlorobenzene in simulated groundwater by these soils was investigated. HDTMA-modified soil has a higher ability to sorb chlorobenzene from simulated groundwater than unmodified soil. TMA-modified soil did not show the superiority. HDTMA thus can be used to modify soil to improve its sorption capability. Cosorption of chlorobenzene in simulated groundwater in the absence or presence of nitrobenzene and dichloromethane on HDTMA-modified soil was also investigated. Nitrobenzene facilitated sorption of chlorobenzene on all HDTMA-modified soil. Dichloromethane did not influence the sorption of chlorobenzene by HDTMA-modified soil. The results suggest that HDTMA-modified soil is a highly effective sorbent for chlorobenzene and multiple organic compounds did not impede the uptake of chlorobenzene. |
| Keywords: | Soil HDTMA TMA Sorption Chlorobenzene Cosorption |
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