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| Adsorption characteristic of organic combined pollutants on the surface of groundwater aquifer |
| LI Hui1, DENG Qiang2 |
1. Key Laboratory of Groundwater Contamination Remediation, China Geological Survey, The Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Science, Shijiazhuang 050061, China;
2. College of Water Resource and Environment, Hebei Geology University, Shijiazhuang 050031, China |
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Abstract To definite the adsorption characteristics of chlorohydrocarbon and aromatic hydrocarbon combined pollutants in groundwater aquifer, adsorption tests were carried out with toluene, benzene, 1,2-dichloropropane, 1,2,3-chemical propane (TCP) as typical pollutants. The results showed that the adsorption process could be described by linear model of Henry with distribution coefficient (Kp) of 0.38, 0.41, 0.73 and 1.00kg/L, respectively, which indicated that the order of adsorption strength of the pollutants is toluene > benzene > 1, 2-dichloropropane > TCP. Furthermore, it was observed that benzene obviously increased the adsorption of toluene in fine sand and toluene decreased the adsorption of benzene conversely; 1, 2-dichloropropane restrained the adsorption of TCP, however, the effect of TCP on the adsorption of 1, 2-dichloropropane was not significant. As for different type of pollutants, the adsorption capacity of TCP in aquifer medium increased with the concentration of toluene; When the initial concentration of toluene was lower than 2mg/L, the TCP acted as a stimulus for the adsorption of toluene, on the contrary, TCP acted as an inhibitor for the adsorption of toluene in aquifer medium.
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Received: 18 February 2018
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