%0 Journal Article
%T Sorption of Nitrobenzene to Anionic Surfactant Modified Layered Double Hydroxides<br>阴离子表面活性剂改性水滑石吸附硝基苯的特性研究
%A XIA Yan
%A ZHU Run-liang
%A TAO Qi
%A LIU Han-yang
%A <br>夏燕
%A 朱润良
%A 陶奇
%A 刘汉阳
%J 环境科学
%D 2013
%I 
%X Sodium dodecyl sulfate (SDS) modified MgAl layered double hydroxides (LDHs) were synthesized at different surfactant concentrations (0.5-2.0 TAEC) by the co-precipitation method. The LDH-DS samples obtained were characterized by powder X-ray diffraction and FT-IR spectroscopy. The results showed that SDS was successfully intercalated into the interlayer of the LDH, and the basal spacing was expanded from 0.80 nm to 3.98 nm. The intercalated SDS was considered consistent with a paraffin bilayers arrangement. The sorption of nitrobenzene on LDH-DS was examined, and the results showed that linear model could fit the sorption isotherms well (R2>0.99), which implied a partitioning sorption process. The sorption coefficient of nitrobenzene (Kd) on LDH-DS was positively related to the DS- loading amount, but the organic carbon content normalized sorption coefficient of nitrobenzene (Koc) was shown to remain relatively constant. The sorption thermodynamics results showed that the sorption of nitrobenzene on LDH-DS was an endothermic process, and the increase of entropy was the driving force for the sorption process.
%K layered double hydroxides
%K sodium dodecyl sulfate
%K nitrobenzene
%K sorption
%K thermodynamics<br>水滑石
%K 十二烷基硫酸钠
%K 硝基苯
%K 吸附
%K 热力学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=9C65539B20E123FCC07ED2F7ACD95EED&yid=FF7AA908D58E97FA&vid=339D79302DF62549&iid=CA4FD0336C81A37A&sid=6ED15D8DCB279BC4&eid=D6354F61445E9456&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=25