非离子表面活性剂改性土壤的制备及其对水中有机污染物的吸附研究

采用室内实验方法，研究了用非离子表面活性剂烷基酚与环氧乙烷缩合物Tx-7、Tx-15制备有机粘土及其对水中芳香族化合物硝基苯、卤代烃l，2-二氯乙烷的吸附作用：结果表明，Tx-7、Tx-15均能与天然蒙脱土结合，Tx-7在天然蒙脱土中的吸附量大于Tx-15；改性土壤对水中有机污染物的吸附能力明显大于天然蒙脱土，Tx-7改性土壤的吸附能力大于Tx-15改性土壤：Tx-7改性土壤和天然蒙脱土对有机物的吸附通过分配进行，吸附等温线可用Henry方程表示。

Modification of Montmorilionites with Non-ionic Surfactants and Their Utilization in Adsorption of Several Organic Compounds from Aqueous Solution

In this paper, preparation of organo- clays using non- ionic surfactants polyethylene glycol ethers, namely, TX- 7, TX- 15 and their adsorption towards organic compounds nitrobenzene, and 1, 2- dichloroethane from aqueous solution have been investigated. The results indicated that both non- ionic surfactants could intercalate into montmorillonite and TX- 7 demonstrated a higher sorption capacity, enhancing sorption of organic compounds by such organoclays obviously. It has been also found that the montmorillonite modified with TX- 7 showed more effective in sorption of organic compounds than did the modified with TX- 15. So did for the modified soil. Sorption mechanism of both the modified soil and raw montmorillonite towards the organic compounds may be regarded due to partition and the sorption isotherms can be expressed by Henry equation.