改性蒙脱石吸附制药废水中残留四环素的研究  

Study on Adsorption of Residual Tetracycline in Pharmaceutical Wastewater Using Modified Montmorillonite

作　　者：王丽琼[1] 王凯[1] 马玉龙[1] 

机构地区：[1]宁夏大学能源化工国家重点实验室培育基地,化学化工学院,宁夏银川750021

出　　处：《环境科学与技术》2017年第8期197-201,215,共6页Environmental Science & Technology

基　　金：国家自然科学基金项目(21467023);宁夏自然科学基金(NZ14024);宁夏科技攻关项目

摘　　要：由于制药废水中四环素的残留量较高,致使该废水在生化处理之前,必须消减其所残留的四环素。该研究用Fe^(3+)和十二烷基磺酸钠(SDS)改性蒙脱石(MMT),探讨Fe-MMT和SDS-MMT对制药废水中四环素的吸附去除能力。结果表明:经Fe^(3+)和SDS改性的蒙脱石,其吸附四环素的能力显著提升,尤其Fe-MMT的吸附能力比原土提高了近1.8倍。Fe-MMT吸附四环素过程符合假二级吸附动力学,但Freundlich、Langmuir和BET吸附等温模型均不能很好地拟合Fe-MMT吸附废水中四环素的行为,说明Fe-MMT对废水中四环素的吸附是一个复杂的过程。Pharmaceutical wastewater containing high residue of tetracycline （TC）,the antibiotics, has to be pretreated to remove TC prior to bio-chemical treatment. In this study, montmodUonite （MMT） was prepared and modified by Fe^3＋ and sodium dodecyl sulfate （ SDS ）, respectively; in addition, adsorptions of tetracycline （TC） in pharmaceutical wastewater onto Fe-MMT and SDS-MMT, the modified products, were investigated. The study suggested that the adsorptive abilities of the modified MMT were increased significantly, especially for Fe-MMT, its adsorptive ability was increased by 1.8 times compared with MMT, the parent clay. Furthermore, the process of TC adsorption onto Fe-MMT fitted the pseudo-second- order model, however, did not follow the isotherm models of Freundlich, Langmuir, and BET, which implied that the adsorption process was complicated.

关 键 词：四环素 蒙脱石 FE3+ 十二烷基磺酸钠 制药废水 

分 类 号：X703[环境科学与工程—环境工程]