Triton X-100在土壤颗粒上的吸附特征研究  

Study on the sorption characteristics of Triton X-100 in soils

作　　者：杨建[1] 陈家军[1] 裴玉梅 郑海亮[1] 卢毅[1] 

机构地区：[1]北京师范大学环境学院环境模拟与污染控制国家重点实验室,北京100875 [2]黑龙江省绥滨县环保局,佳木斯156200

出　　处：《环境工程学报》2009年第1期189-192,共4页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(40772148)

摘　　要：采用平衡振荡法，研究了砂土对非离子表面活性剂Triton X-100的吸附特征。结果表明，砂颗粒对Triton X-100的吸附能力总体较低，单位吸附含量均〈1．1mg／g；砂颗粒吸附Triton X-100过程中存在显著的吸附剂浓度效应，砂颗粒上Triton X-100含量随着固液比（吸附剂浓度）的增大而减小；吸附容量qm与平衡常数KL值随固液比变化而变化，Langmuir方程适用范围是起始浓度C0相对较小的固-液吸附体系；0．5～1mm石英砂的吸附能力略〉0．2—0．5mm石英砂，0．5-1mm和0．2～0．5mm石英砂吸附Triton X-100变化特征具有显著的一致性，采用高斯拟合模型可以反映出石英砂吸附Triton X-100的变化规律，相关系数R^2均〉0．98。Absorbed surfactant has a significant influence on surfactant-enhanced flushing for hydrophobic organic pollution in soils. Equilibrium oscillometry was conducted to investigate the sorption characteristics of nonionic surfactant （Triton X-100） in sand soil. The results showed that the content of absorbed Triton X-100 is lower than 1.1 mg/g in different grain size sand soil. The effect of absorbent concentration is obviously for Triton X-100 sorption, and Triton X-100 content decreases with the increasing of solid-liquid ratio （absorbent concentration）. Sorption capacity （qm） and equilibrium constant （KL） vary with the change of solid-liquid ratio, Langmuir formula is suitable for the solid-liquid sorption system of low initial concentration （ Co ）. 0.5 - 1 mm sand soil has bigger sorption capacity than 0.2 -0.5mm sand soil, and sorption characteristics of Triton X-100 have consistency in two sand soils. The fitting results of gauss model can reflect the sorption of Triton X-100 very well with correlation coefficient （R^2） higher than 0.98.

关 键 词：TRITON X-100 土壤 吸附特征 

分 类 号：X131.3[环境科学与工程—环境科学]