EDTA改性制备四聚阳离子表面活性剂及其去除土壤中铅的研究  

Preparation of EDTA modified tetrameric cationic surfactant and study on removal of Lead from soil

作　　者：童德彬 陈志[1] 王艺凡 张勇 许俊强[1] 唐聪明 王耀琼[1] TONG De-bin;CHEN Zhi;WANG Yi-fan;ZHANG Yong;XU Jun-qiang;Tang Cong-ming;WANG Yao-qiong(School of Chemistry and Chemical Engineering,Chongqing University of Technology,Chongqing 400054 China)

机构地区：[1]重庆理工大学化学化工学院

出　　处：《化学研究与应用》2019年第12期2125-2129,共5页Chemical Research and Application

基　　金：重庆市教委科技项目(KJQN201801112)资助;重庆市自然科学基金面上项目(cstc2019jcyj-msxm0913)资助;重庆市巴南区科委科技计划项目(2017TJ12)资助;重庆理工大学研究生创新项目(ycx2018254)资助

摘　　要：利用EDTA改性制备季铵盐四聚阳离子表面活性剂(TCS)并用于去除污染土壤中的Pb。研究结果表明:使用0.03g·mL-1的单一表面活性剂对Pb有较好的洗脱效果,明显优于传统阳离子表面活性剂DTAB,去除率达到55.1%;相同实验条件下,超声强化表面活性剂去除Pb作用明显,去除率提高7.2倍;Pb形态分析表明表面活性剂对土壤中5种形态的Pb都具有去除效果,但对可交换态和铁锰氧化物结合态效果最明显。Quaternary ammonium tetrameric cationic surfactant(TCS)was prepared by EDTA modification and used to remove Pb from contaminated soil.The results showed that the best removal rate of Pb was 55.1%by only using 0.03g·mL-1 surfactant,which was obviously superior to the traditional cationic surfactant DTAB.Under the same experimental conditions,the removal rate of Pb by ultrasound-enhanced surfactant could be improved 7.2 times.The morphological analysis of Pb showed that surfactant had removal effect on five forms of Pb in soil,but the removal effect on exchangeable and iron-manganese oxide bound forms was the most obvious.

关 键 词：超声强化 阳离子表面活性剂 PB污染土壤 去除率 

分 类 号：O647.2[理学—物理化学]