%0 Journal Article
%T Sorption and Mechanism of Surfactants on Bentonite in Combined Pollution<br>膨润土对复合污染中表面活性剂的吸附及机理
%A SUN Xiao-hui
%A LU Ying-ying
%A CHEN Shu-guang
%A LI Ling-jian
%A SHEN Xue-you
%A <br>孙晓慧
%A 卢瑛莹
%A 陈曙光
%A 李灵剑
%A 沈学优
%J 环境科学
%D 2007
%I 
%X Sorption of cationic surfactant cetyl pyridinium chloride (CPC), anionic surfactant sodium dodecylbenzene sulfonate (SDBS) and nonionic surfactant Triton X-100(TX-100) on bentonite was studied. The influences of cation-exchange capacity (CEC), temperature and salinity on the sorption of CPC were also discussed. The results indicate that the sorption of CPC on Na-bentonite is greater than that of TX-100 and SDBS, and SDBS hardly shows any sorption. CPC is adsorbed to Na-bentonite through a combination of hydrophobic bonding and cation-exchange. While TX-100 is adsorbed to Na-bentonite via the formation of an adsorption layer of twain surfactant molecule and hydrogenolysis of silicon-oxygen surface of bentonite and TX-100. The amount of SDBS adsorbed on Ca-bentonite increases with increasing surfactant concentration, reaching a maximum at 1.5 critical micelle concentration (CMC), and then decreases with increasing surfactant loading. The mechanism of the retention appears to be formation of a sparingly soluble Ca-SDBS species, and dissolution in the micelle. The amount of CPC adsorbed on bentonite decreases with increasing temperature, and increases with increasing CEC. NaCl can enhance the sorption of CPC on bentonite.
%K bentonite
%K sorption
%K cation-exchange capacity(CEC)
%K cetyl pyridinium chloride(CPC)
%K sodium dodecylbenzene sulfonate(SDBS)
%K Triton X(TX-100)<br>膨润土
%K 吸附
%K 阳离子交换容量(CEC)
%K 氯化十六烷基吡啶(CPC)
%K 十二烷基苯磺酸钠(SDBS)
%K Triton
%K X-100(TX-100)
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=BC85E858628321E12D8384C1D70222D3&yid=A732AF04DDA03BB3&vid=D3E34374A0D77D7F&iid=E158A972A605785F&sid=D40528F59753C0F7&eid=043C7D0F3F6AC1B3&journal_id=0250-3301&journal_name=环境科学&referenced_num=4&reference_num=11