| 塿土对阴-非离子表面活性剂的吸附特征研究 |
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| 引用本文： | 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].农业环境保护,2011(4):690-696. |
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| 作者姓名： | 万卷敏 杨亚提 刘霞 张文娟 张萌 |
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| 作者单位： | [1]西北农林科技大学资源环境学院,陕西杨凌712100 [2]西北农林科技大学理学院,陕西杨凌712100 |
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| 基金项目： | 陕西省科技计划项目（2009K02-03） |
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| 摘 要： | 以平衡吸附法研究了塿土对阴离子表面活性剂（SDS）、非离子表面活性剂（TritonX-100、Tween80和Brij35）的吸附特征,考察了pH、阴-非离子表面活性剂混合对塿土吸附表面活性剂的影响。结果表明,非离子表面活性剂在塿土上吸附等温线均呈L型,且均符合Freundlich和Langmuir方程;塿土对SDS的吸附等温线呈LS型,可用Freundlich方程来描述;塿土对4种表面活性剂吸附量的大小顺序为Tween80〉SDS〉Brij35〉TritonX-100。当阴-非离子表面活性剂一起进入土壤中,SDS-Brij35之间的相互影响不大;TritonX-100与SDS相互作用较大,无论二者以何种方式混合都会使TritonX-100在塿土上的吸附量增加,SDS的吸附量下降;SDS与Tween80之间的相互作用最大,混合后吸附量均下降,但Tween80吸附量降低的幅度最大。pH对非离子表面活性剂的吸附影响不大,而随着pH的增加,塿土对SDS的吸附百分率明显下降;在pH为8.0时,塿土对非离子表面活性剂的吸附百分率达到80以上。因此在选择合适的表面活性剂进行有机污染土壤修复和治理时,考虑土壤的特性和表面活性剂的结构是非常重要的。
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| 关 键 词： | 吸附 塿土 阴-非离子表面活性剂 平衡 修复 |
Adsorption of Anionic-Nonionic Surfactants on Lou Soil |
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| WAN Juan-min,YANG Ya-ti,LIU Xia,ZHANG Wen-juan,ZHANG Meng.Adsorption of Anionic-Nonionic Surfactants on Lou Soil[J].Agro-Environmental Protection,2011(4):690-696. |
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| Authors: | WAN Juan-min YANG Ya-ti LIU Xia ZHANG Wen-juan ZHANG Meng |
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| Institution: | 1.College of Resources and Environment,Northwest Agriculture ＆ Forest University,Yangling 712100,China;2.College of Science,Northwest Agriculture ＆ Forest University,Yangling 712100,China) |
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| 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. |
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| Keywords: | adsorption Lou soil anionic-nonionic surfactant equilibrium remediation |
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