Liu Jianfei, Chen Weihong
School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China E-mail:
Jiaozuo Jinhui Engineering Technology Co., Ltd, Jiaozuo 454003, China.
Water Sci Technol. 2015;72(9):1552-60. doi: 10.2166/wst.2015.357.
Batch experiments were conducted to investigate the performance of nonionic-anionic mixed surfactants and their recovery through activated carbon. The solubilization capabilities of mixed surfactants toward phenanthrene (PHE) were reduced by addition of anionic surfactant to the mixed systems. Results showed that sorption of Triton X-100 (TX100) onto soil decreased with increasing mass fraction of sodium dodecyl sulfate (SDS) in the mixed surfactant solutions. Soil contaminated with PHE at 200 mg/kg was washed with different surfactant concentrations at various mass ratios of nonionic-anionic mixed surfactant. Experiments with low-concentrations of mixed surfactants revealed that removal efficiencies for PHE-contaminated soil close to the individual higher nonionic surfactant concentration can be achieved. Overall performance considering both soil washing and surfactant recovery steps is apposite when an TX100:SDS mass ratio of 8:2 at 3 g/L is used.
进行了批次实验，以研究非离子 - 阴离子混合表面活性剂的性能及其通过活性炭的回收情况。向混合体系中添加阴离子表面活性剂会降低混合表面活性剂对菲（PHE）的增溶能力。结果表明，在混合表面活性剂溶液中，随着十二烷基硫酸钠（SDS）质量分数的增加，Triton X - 100（TX100）在土壤上的吸附量减少。用不同浓度的非离子 - 阴离子混合表面活性剂以各种质量比清洗受200 mg/kg PHE污染的土壤。低浓度混合表面活性剂的实验表明，对于受PHE污染的土壤，接近单独较高非离子表面活性剂浓度时可实现去除效率。当使用3 g/L的TX100:SDS质量比为8:2时，综合考虑土壤清洗和表面活性剂回收步骤的整体性能是合适的。
