文献类型：期刊文献

中文题名：铁基膨润土对二甲基二硫醚的催化降解性能

英文题名：Catalytic ability of iron-modified bentonite for degradation of dimethyl disulfide

作者：令狐珊珊[1];潘涛[1];赵韬[1];张朋康[1];刘邦国[1];陈秀荣[1]

机构：[1]华东理工大学资源与环境工程学院,上海200237

年份：2023

卷号：43

期号：3

起止页码：375

中文期刊名：化工环保

外文期刊名：Environmental Protection of Chemical Industry

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD_E2023_2024】；

基金：国家重点研发计划项目(2019YFC1806104)。

语种：中文

中文关键词：铁基膨润土;过氧化氢;催化氧化;二甲基二硫醚

外文关键词：iron-modified bentonite;hydrogen peroxide;catalytic oxidation;dimethyl disulfide

摘要：采用铁氧化物对膨润土进行改性,制备了铁基膨润土,考察了铁基膨润土对过氧化氢降解溶液中二甲基二硫醚的催化效果。表征结果显示:改性后铁基膨润土的表面变得粗糙,层间距离增大,比表面积和孔体积明显增大。实验结果表明:在二甲基二硫醚初始质量浓度为24 mg/L、铁基膨润土加入量为1.5 g/L、铁基膨润土与过氧化氢质量比为1∶5、初始pH为3.0的最佳工艺条件下,反应60 min后,溶液中二甲基二硫醚的去除率可达98%;准一级动力学模型能够较好地描述铁基膨润土-过氧化氢、膨润土-过氧化氢和过氧化氢3种反应体系对二甲基二硫醚的降解动力学过程,相应的反应速率常数分别为0.0801 min^(-1),0.0226 min^(-1),0.0073 min^(-1)。
Bentonite was modified with iron oxide to prepare iron-modified bentonite.The catalytic effect of iron-modified bentonite on degradation of dimethyl disulfide in solution by hydrogen peroxide was investigated.The characterization results show that the iron-modified bentonite has a rougher surface,larger interlayer distance,and significantly increased specific surface area and pore volume.The experimental results show that:Under the optimum process conditions of initial dimethyl disulfide mass concentration 24 mg/L,iron-modified bentonite amount 1.5 g/L,mass ratio of iron-modified bentonite to hydrogen peroxide 1∶5,initial pH 3.0 and reaction time 60 min,the removal rate of dimethyl disulfide in solution can reach 98%;The pseudo first-order kinetic model can well describe the degradation process of dimethyl disulfide in iron-modified bentonite-hydrogen peroxide system,bentonite-hydrogen peroxide system and hydrogen peroxide system with the corresponding reaction rate constant of 0.0801 min^(-1),0.0226 min^(-1)and 0.0073 min^(-1),respectively.