长链季铵盐插层的蒙脱石对乙草胺降解产物的吸附作用  

Adsorptive Properties of Organic-intercalation Montmorillonite by Long Hydrocarbon Chain towards Acetochlor Degradation Products

作　　者：李灵 张玉 蔡艺婷 谢淑芳 邱炎坤 林慧敏 LI Ling;ZHANG Yu;CAI Yiting;XIE Shufang;QIU Yankun;LIN Huimin(Fujian Provincial Key Laboratory of Eco-Industrial Green Technology,School of Ecology and Resources Engineering,Wuyi University,Wuyishan,Fujian 354300;College of Architecture and Civil Engineering,Wuyi University,Wuyishan,Fujian 354300)

机构地区：[1]武夷学院生态与资源工程学院福建省生态产业绿色技术重点实验室,福建武夷山354300 [2]武夷学院土木工程与建筑学院,福建武夷山354300

出　　处：《武夷学院学报》2020年第6期1-5,共5页Journal of Wuyi University

基　　金：福建省自然科学基金(2017J01650);国家级大学生创新训练计划项目(201610397008)。

摘　　要：环境中残留的乙草胺能被转化成毒性更强的乙基磺酸类降解产物,对钠基蒙脱石(Na-MMt)以十八烷基三甲基氯化铵(OTAC)为插层剂合成有机蒙脱石吸附剂,通过傅里叶红外光谱、扫描电子显微镜和热重分析进行了结构表征。结果表明:当OTAC的用量是Na-MMt的35%(记为OMMt35)时,有机蒙脱石对乙草胺ESA的吸附率达到最大,为89.8%,是Na-MMt的12.3倍;OTAC有机插层后使蒙脱石由亲水性向疏水性转变;随着pH值减小,吸附率增大,重金属离子和腐殖酸与乙草胺ESA发生竞争吸附。Acetochlor residues in the environment can be converted into more toxic degradation products of ethane sulfonic acids(ESA).An adsorbent of modified organo-montmorillonites for removing acetochlor ESA was prepared from Na-MMt using octadecyl trimethyl ammonium chloride(OTAC)as surface modifier agents.The produced adsorbent was examined by FTIR,SEM and TGA.Results show that the optimal condition happened in m(OTAC/Na-MMt)=35%(OMMt35),producing acetochlor ESA adsorption efficiency to 89.8%of 12.3 times higher than the Na-MMt.The performance of organo-montmorillonite was changed from hydrophilicity into hydrophobic property.The removal rate of acetochlor ESA by OMMt35 adsorbent increased with decreasing solution pH value while humic acid and heavy metal ions acted competitive adsorption.

关 键 词：十八烷基三甲基氯化铵 有机蒙脱石 乙草胺ESA 吸附作用 

分 类 号：X522[环境科学与工程—环境工程]