改性凹凸棒石对模拟含酚废水处理机制的研究  

REMOVAL MECHANISMS OF PHENOL FROM WASTEWATER BY MODIFIED ATTAPULGITE

作　　者：包军杰[1] 余贵芬[2] 蒋新[2] 彭伟[3] 

机构地区：[1]安徽农业大学资源与环境学院,合肥210036 [2]中国科学院南京土壤研究所,南京210008 [3]安徽省马鞍山市环境保护局,马鞍山243011

出　　处：《环境化学》2006年第1期37-40,共4页Environmental Chemistry

基　　金：国家自然科学基金(40201025);瑞典国际科学基金(IFSC/34031)资助项目.

摘　　要：利用有机阳离子表面活性剂对凹凸棒石表面进行改性,研究改性凹凸棒石吸附去除模拟含酚水中苯酚的机理,同时对影响吸附去除苯酚的因素进行探讨.结果表明,用十六烷基三甲基溴化铵(HDTMA)和溴代十六烷基吡啶(CPB)等有机阳离子对天然凹凸棒石进行改性后能大大提高对苯酚的吸附去除率;HDTMA和CPB改性土对苯酚的吸附机制主要是其有机相对苯酚的分配作用;HDTMA和CPB改性土对苯酚的吸附等温线呈线性,L型吸附等温方程更适合该吸附过程.在pH>10时,HDTMA改性土除通过分配作用以外还可通过静电吸附增强对苯酚的吸附;随着HDTMA改性剂用量的增加,HDTMA改性土对苯酚的吸附去除率也逐渐增加并达到最大值.Cation surfactants modified attapulgites were prepared and the removal mechanism of phenol from wastewater by these modified attapulgites was investigated in present study. Results showed that the removal efficiency of phenol from wastewater with HDTMA- and CPB-modified attapulgite were greatly improved. The linear isotherm showed that partition mechanism accounted for the removal of phenol from wastewater by HDT- MA- and CPB-modified attapulgite. The sorption isotherm of phenol was better fit for Langmuir isotherms equa- tion than the Henry＇s and Freundlich＇s isotherms. The removal of phenol increase with the increase of the amount of HDTMA used in modified attapulgite. The higher the pH was, the more phenol was removed.

关 键 词：改性凹凸棒石 阳离子表面活性剂 苯酚 

分 类 号：X703[环境科学与工程—环境工程]