膨润土-钢渣复合颗粒吸附剂对Mn^(2+)的吸附特性研究  

Adsorption Characteristics of Mn^(2+)by Bentonite-Steel Slag Composite Adsorbent

作　　者：耿莘惠 李倩倩[1] 杨曦[1] 马哲 穆怡陶 GENG Xin-hui;LI Qian-qian;YANG Xi;MA Zhe;MU Yi-tao(Shenyang Urban Construction University,Shenyang Liaoning 110167,China)

机构地区：[1]沈阳城市建设学院,辽宁沈阳110167

出　　处：《辽宁化工》2023年第8期1107-1109,1171,共4页Liaoning Chemical Industry

基　　金：沈阳城市建设学院科学研究发展基金项目(项目编号:XKJ2021Q21);沈阳城市建设学院2022年大学生创新创业训练计划项目(项目编号:202213208123)。

摘　　要：为解决单一材料处理水中污染物的局限性,采用天然膨润土、环境矿物材料钢渣制备复合颗粒吸附剂,研究该复合颗粒吸附剂对Mn^(2+)的吸附特性。结果表明:膨润土复合颗粒吸附剂对Mn^(2+)的吸附更倾向于BET多分子层吸附,复合颗粒吸附剂对Mn^(2+)的吸附较容易进行,在复合颗粒的表面属于多分子层吸附;对Mn^(2+)的吸附动力学符合拟二级动力学方程,复合颗粒对Mn^(2+)的吸附过程中既有化学键的形成过程,也有颗粒内扩散过程,另外也伴随着表面的吸附过程;通过微观SEN-EDS分析,进一步表明,复合颗粒吸附剂能吸附-聚沉Mn^(2+)。实验揭示了膨润土复合颗粒吸附剂对Mn^(2+)的吸附过程伴随着化学键的形成,通过吸附-聚沉作用去除Mn^(2+),是物理吸附与化学吸附共同作用的结果,是一种优良的吸附剂。In order to solve the limitation of a single material in the treatment of pollutants in water,the composite particle adsorbent was prepared by natural bentonite and environmental mineral material steel slag,and the adsorption characteristics of the composite particle adsorbent on Mn^(2+)were studied.The experimental results showed that the adsorption of Mn^(2+)by bentonite composite particle adsorbent was more inclined to BET multi-molecular layer adsorption,and the adsorption of Mn^(2+)by composite particle adsorbent was easier,which belonged to multi-molecular layer adsorption on the surface of composite particles.The adsorption kinetics of Mn^(2+)was in line with the pseudo-second-order kinetic equation.The adsorption process of Mn^(2+)by composite particles included the formation of chemical bonds,the diffusion process within particles,and the adsorption process on the surface.Micro-SEN-EDS analysis further showed that the composite particle adsorbent could adsorb and polymer-sink Mn^(2+).The experimental results showed that the adsorption process of Mn^(2+)on bentonite composite particle adsorbent was accompanied by the formation of chemical bonds.The removal of Mn^(2+)by adsorption-coagulation was the result of the joint action of physical adsorption and chemical adsorption,which was an excellent adsorbent.

关 键 词：膨润土 复合颗粒 吸附等温式 吸附动力学 微观表征 

分 类 号：TQ424[化学工程]