表面活性剂修复重金属污染土壤的研究

摘要

This paper discusses the rcmediation effects of three surfactants, i. e. , sodium dodecyl benzene sulfonate （SDBS）, sodium dodecyl sulfate （SI~S）, polysorbate （Tween-80） on remediation and elution of soils polluted by heavy metals such as chromium and cadmium as well as the adsorption of the polluted soil to the three surfactants. The leaching experiment shows that the three surfactants have significant effects to remove chromium and cadmium in the soil, of which the removal rate of chromium and cadmium by polysorbate are 61.2% and 37.06% respectively. The experiment shows that the polluted soils have strong adsorption effect to all the three surfactants, which has adverse effect of removing heavy metals from the soil.%本文探讨了3种常用表面活性剂,十二烷基苯磺酸钠（SDBS）、十二烷基硫酸钠（SDS）、聚山梨脂（Tween-80）对被重金属铬、镉污染了的土壤的修复洗脱作用,以及被污染土壤对3种表面活性剂的吸附作用。淋洗实验结果表明,3种表面活性剂对土壤中的铬、镉有明显去除效果,聚山梨脂（Tween-80）对污染土壤中铬和镉的去除率分别为61.2%和37.06%。实验表明,土壤对3种表面活性剂均有较强的吸附作用,这种吸附作用对土壤重金属的去除会产生不利的影响。