高比表面积介孔α-FeOOH的制备及其Sb(Ⅴ)吸附性能  

Preparation of mesoporous α-FeOOH with high specific surface area and its adsorption capability to Sb(Ⅴ)

作　　者：郭阳 李士凤[1] 姚淑华[1] 石中亮[1] 臧淑艳[1] GUO Yang;LI Shifeng;YAO Shuhua;SHI Zhongliang;ZANG Shuyan(Liaoning Engineering Research Center for Treatment and Recycling of Industrially Discharged Heavy Metals,Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学辽宁省工业排放重金属处理与资源化利用工程技术工程研究中心

出　　处：《化工环保》2019年第5期562-567,共6页Environmental Protection of Chemical Industry

基　　金：国家重点研发计划项目(2017YFD0800301);辽宁省自然科学基金项目(20170540727);辽宁省教育厅科学研究项目青年项目(LQ2017012)

摘　　要：采用水热合成的方法制备了高比表面积介孔α-FeOOH吸附剂,并探究其对水中Sb(Ⅴ)的去除效果。采用XRD、SEM、ATR-FTIR等方法对吸附剂进行了表征。考察了吸附剂投加量、溶液pH对Sb(Ⅴ)去除效果的影响,以及Sb(Ⅴ)吸附过程的动力学和热力学特性。表征结果显示:介孔α-FeOOH具有棒状结构,长度大约为50~100nm,最可几孔径为20nm,比表面积为137.6m2/g。实验结果表明,当初始Sb(Ⅴ)质量浓度为10mg/L、pH为7、介孔α-FeOOH投加量为0.25g/L、吸附时间为2h、吸附温度为25℃时,Sb(Ⅴ)去除率可达100%;pH为4~7时,Sb(Ⅴ)去除率受pH的影响较弱;Sb(Ⅴ)吸附过程符合拟二级动力学模型及Langmuir吸附模型。An adsorbent mesoporousα-FeOOH with high specific surface area was prepared by hydrothermal method and its removal capability to Sb(Ⅴ)in water was investigated.The adsorbent was characterized by XRD,SEM,ATR-FTIR and so on.The effects ofα-FeOOH dosage and solution pH on Sb(Ⅴ)removal,and the kinetics and thermodynamic characteristics of Sb(Ⅴ)adsorption process were studied.The characterization results indicate that the mesoporousα-FeOOH has a rod-like structure with about 50~100 nm of length,20 nm of most probable pore size and 137.6 m2/g of specific surface area.The experimental results show that theremoval rate of Sb(Ⅴ)can reach 100%when the initial Sb(Ⅴ)mass concentration is 10 mg/L,the pH is 7,theα-FeOOH dosage is 0.25 g/L,the adsorption time is 2 h and the adsorption temperature is 25℃;In the range of pH 4-7,the removal rate of Sb(Ⅴ)is weakly affected by pH;The Sb(Ⅴ)adsorption process conforms to the pseudo second-order kinetic model and the Langmuir adsorption model.

关 键 词：锑 介孔 羟基氧化铁 吸附 

分 类 号：X52[环境科学与工程—环境工程]