表面活性剂对中性氧化铝吸附甲基对硫磷的影响  

Effects of Surfactants on Adsorption of Methyl Parathion by Neutral Alumina

作　　者：汤灿[1] 曾清如[2] 李国学[1] 杨成建[2] 廖柏寒[2] 

机构地区：[1]中国农业大学资源环境学院,北京100094 [2]湖南农业大学环境科学系,长沙410128

出　　处：《环境科学》2007年第2期358-362,共5页Environmental Science

基　　金：国家高技术研究发展计划(863)项目(2005AA601010-02);湖南省教育厅基金项目(02C556)

摘　　要：分别应用离子型表面活性剂十二烷基硫酸钠(SDS)、十二烷基苯磺酸钠(SDBS)和十六烷基三甲基溴化铵(CTMAB)改性中性氧化铝对甲基对硫磷这种疏水性环境污染物进行吸附性能研究.结果表明,中性氧化铝对甲基对硫磷的吸附行为与表面活性剂的种类和浓度及环境中pH值有关.原中性氧化铝对甲基对硫磷的吸附能力较小,加入阴离子表面活性剂及调节pH值后其吸附能力增强.氧化铝对3种离子型表面活性剂的吸附性能有所不同,在中性条件下,对SDS的吸附量最大,对CTMAB的吸附量最小;当介质pH为4时,氧化铝对SDS或SDBS的吸附量都有所增大,对CTMAB的吸附量则下降.甲基对硫磷和阴离子表面活性剂同时存在于溶液中时,产生协同效应,使氧化铝对甲基对硫磷的吸附能力有所提高.而阳离子表面活性剂存在下,氧化铝对甲基对硫磷的吸附能力则逐渐下降.The sorption of methyl parathion by neutral alumina which was modified by ionic surfactants such as SDS,SDBS and CTMAB was studied. It showed that the edsorbability of alumina to methyl parathion were related to the type and concentration of surfaetant and pH of the system. The adsorbabilities of alumina on three kinds of surfaetants were different. When pH = 7, the adsorbance of SDS was the largest, but the adsorbance of CTMAB was the smallest. When pH = 4, the adsorbance of SDS or SDBS was increased, while the adsorbance of CTMAB was decreased.The adsorbability of alumina was strengthened, not weakened, by the cooperation of pollutant and anionic surfactant, while the sorpfion of methyl parathion by alumina with cationic surfactant was weakened. These features had the practical value when neutral alumina is used to remove more than one contaminants from wastewater.

关 键 词：中性氧化铝 离子型表面活性剂 吸附作用 甲基对硫磷 

分 类 号：X592[环境科学与工程—环境工程]