无机改性红辉沸石吸附Cr(Ⅵ)研究  

Study on Adsorption of Cr(Ⅵ) by Inorganic Modified Stellerite

作　　者：曾惠婷 陈文[1] 曾鸿鹄[1,2] 陆燕勤[1,2] 张华[1,2] ZENG Huiting;CHEN Wen;ZENG Honghu;LU Yangqin;ZHANG Hua(Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin University of Technology;Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林理工大学,广西环境污染控制理论与技术重点实验室 [2]桂林理工大学,广西岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林514004

出　　处：《水处理技术》2020年第10期74-78,82,共6页Technology of Water Treatment

基　　金：国家自然科学基金(51578171);广西科技计划创新研究团队项目(2018GXNSFGA281001);桂林理工大学博士后科研启动项目(RD18100471)。

摘　　要：以红辉沸石、六水合氯化铁溶液为改性材料,采用浸泡后恒温水浴陈化制备无机改性红辉沸石(Fe-Z),考察了溶液的pH、吸附温度、吸附时间、吸附剂用量等因素对Cr(Ⅵ)吸附的影响,并采用吸附动力学模型、吸附等温线模型对实验数据进行拟合分析。结果表明,实验优化条件为:温度35℃,pH为3,沸石投加量0.15 g,初始Cr(Ⅵ)的质量浓度50 mg/L,投加反应时间500 min时,此时改性红辉沸石对Cr(Ⅵ)吸附效率去除率为佳。改性红辉沸石对Cr(Ⅵ)的吸附符合准2级动力学模型和Langmuir等温模型,是化学吸附、单分子层吸附的过程。Inorganic modified stellerite(Fe-Z)was prepared with stellerite and ferric chloride solution after immersion in constant temperature water bath.The influence of pH,adsorption temperature,adsorption time and amount of adsorbent on the adsorption of Cr(Ⅵ)were investigated.The adsorption kinetics model and adsorption isotherm model were used to fit and analyze experimental data.The results showed that,the experimental optimization conditions was as follow,temperature,pH,zeolite dosage initial Cr(Ⅵ)mass concentration and reaction time was 35℃,3,0.15 g,50 mg/L and 500 min,respectively,the Fe-Z had the best adsorption efficiency for Cr(Ⅵ)removal rate.The adsorption of Fe-Z to Cr(Ⅵ)conformed to the pseudo-secondary kinetic model and Langmuir isothermal model,and was a process of chemical adsorption and single molecular layer adsorption.

关 键 词：红辉沸石 Cr(Ⅵ) 吸附 动力学 

分 类 号：X703.1[环境科学与工程—环境工程]