农业环境科学学报2011，Vol.30Issue(4)：690-696,7.
塿土对阴-非离子表面活性剂的吸附特征研究
Adsorption of Anionic-Nonionic Surfactants on Lou Soil
摘要
Abstract
Batch adsorption experiments were employed to evaluate the adsorption of surfactants on Lou soil, and the factors affected its adsorption, i.e. surfactant mixing ratio and pH were also studied. Results showed that the adsorption of nonionic surfactant, i.e. Triton X-100,Tween 80 and Brij35 on Lou soil was L type isotherm that can be described with both Langmuir and Freundlich models, while LS type isotherm, which can be fitted by Freundlich isotherm, was the best model for simulating the SDS adsorption. The adsorption amount of SDS on soil was lower than that of Tween80, but was higher than that of both TritonX-100 and Brij35. For mixing adsorption of anionic-nonionic surfactant on Lou soil, there was little interaction between SDS and Brij35, while greater interaction was between TritonX-100 and SDS, the mixture of 2 kinds of surfactants could increase the adsorption of TritonX-100 but decrease adsorption of SDS. The interaction was the strongest between SDS and Tween80 which resulted in decreasing the adsorption of both SDS and Tween80 simultaneously, although the adsorption amount of Tween80 decreased sharply. The increase of solution pH decreased the adsorption of SDS and Tween80 on Lou soil, but affected the adsorption of Brij35, TritonX-100 slightly. The adsorption percentage of nonionic surfactants on Lou soil was above 80％ at pH 8.0. The results above indicated that the soil characteristics and the structure of surfactants are important factors in selecting the appropriate surfactants for recovering organic contaminated soil.关键词
吸附/塿土/阴-非离子表面活性剂/平衡/修复Key words
adsorption/ Lou soil/ anionic-nonionic surfactant/ equilibrium/ remediation分类
资源环境引用本文复制引用
万卷敏,杨亚提,刘霞,张文娟,张萌..塿土对阴-非离子表面活性剂的吸附特征研究[J].农业环境科学学报,2011,30(4):690-696,7.基金项目
陕西省科技计划项目(2009K02-03) （2009K02-03）
