砂土和壤土中不同因子对三氯乙烯的吸附影响

The effects of influencing factors on the adsorption of trichloroethylene in loam and sandy soil

采用批实验的方法,研究了三氯乙烯在砂土和不同壤土中的吸附行为,并探讨了三氯乙烯初始浓度、有机质含量和温度对其吸附的影响。结果表明,三氯乙烯在壤土和砂土中的吸附等温线都呈非线性;当三氯乙烯的浓度和土壤有机质含量较低时,土壤对三氯乙烯的吸附比较平缓;随着三氯乙烯浓度和土壤有机质含量的增加,其吸附量也明显增加。同时,温度升高不利于TCE的吸附。

In a series of batch experiments, this paper studied the adsorption of trichloroethylene （TCE） in sandy and loam soil with different depths. The influencing factors were also discussed, including initial concentration of TCE, soil organic matter and temperature. The results indicated that the adsorption isotherm in the two soils was non-linear within the experimental range. When concentration of TCE and content of soil organic matter were low, the adsorption capacity of TCE did not vary greatly with the increasing of organic contents. With the increasing of soil organic matter and initial TCE in soil, the TCE adsorption capacity varied considerably. In addition, the elevated temperature was not conducive to the adsorption of TCE in soil.