Batch Experiments to Remove Chlorohydrocarbons from Wastewaters Using Surfactant-Modified Geomaterials
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摘要: 利用天然沸石、膨润土、碱性流纹岩及英安岩等岩矿材料及其表面活性剂HDTMA-Br改性产物对废水中有机氯化物的去除进行了实验研究.结果表明, 表面活性剂改性作用有利于增强岩矿材料对水中有机氯化物的去除作用, 其中, 改性膨润土去除效果最好, 二氯甲烷、三氯甲烷、四氯化碳、三氯乙烯、四氯乙烯和氯苯的去除量分别达到9.1, 18.9, 43.0, 20.0, 32.4和30.3μg·g-1.有机物在沉积物中的有机碳-水分配系数Koc与岩矿材料对有机氯化物的去除量之间有较好的相关关系.Abstract: Natural and surfactant-modified geomaterials(such as zeolite, bentonite, dacite and rhyolite) were used to remove chlorohydrocarbons from wastewater in this paper.The results show that surfactant(HDTMA-Br)can enhance the removal of chlorohydrocarbons by geomaterials, of which the modified bentonite shows the highest degree of removal of dichloromethane, trichloromethane, tetrachloromethane, trichloroethylene, tetrachloroethylene, and chlorobenzene at 9.1, 18.9, 43.0, 20.0, 32.4 and 30.3μg·g-1, respectively.A good linear correlation exists between removal of chlorohydrocarbons and Koc(which refers to the distribution coefficients of organic substances between the organic carbon of sediment and water).
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Key words:
- chlorohydrocarbon /
- wastewater /
- geomaterial /
- zeolite /
- bentonite
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表 1 实验材料化学成分
Table 1. Chemical compositions of experimental materials
表 2 岩矿材料吸附有机氯化物的批次实验结果
Table 2. Results of batch sorption experiments of chlorohydrocarbons
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