%0 Journal Article
%T Impacts of pH and Surfactants on Adsorption Behaviors of Norfloxacin on Marine Sediments<br>pH及表面活性剂对诺氟沙星在海洋沉积物上吸附行为的影响
%A PANG Hui-ling
%A YANG Gui-peng
%A GAO Xian-chi
%A CAO Xiao-yan
%A <br>庞会玲
%A 杨桂朋
%A 高先池
%A 曹晓燕
%J 环境科学
%D 2012
%I 
%X The adsorption behaviors of norfloxacin (NOR) on marine sediments at different pH values and in the presence of four different surfactants were systematically investigated by a batch equilibrium method. The results indicated that Freundlich adsorption isotherms fitted the adsorption behavior of NOR on marine sediments very well at different pH values. The Freundlich constant KF and the equilibrium adsorption amount of NOR reduced with the increase of pH values, and the minimum appeared at pH 8.10. The results suggested that cation exchange was the main adsorption mechanism of NOR at pH 6.01, while Van der Waals' force, hydrophobic effects, electrostatic force were the major adsorption mechanism of NOR on marine sediments at pH 8.10. The adsorption process fitted well with pseudo-second-order kinetic equations with the addition of surfactants. Our study also indicated that the addition of surfactants had the significant influence on the saturated adsorption amount of adsorption of NOR. The equilibrium adsorption amount (Qe) of NOR exhibited the following sequence: Qe(Tween80)<Qe(Tween20)<Qe(No)<Qe(CTAB)<Qe(SDBS).
%K norfloxacin(NOR)
%K sorption
%K marine sediments
%K surfactants
%K pH<br>诺氟沙星
%K 吸附
%K 海洋沉积物
%K 表面活性剂
%K pH
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=4189763B19B8AD45DDC0EC41ABD133DF&yid=99E9153A83D4CB11&vid=27746BCEEE58E9DC&iid=CA4FD0336C81A37A&sid=28F8B56DB6BEE30E&eid=03A030BB0C519C60&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=28