Pb(Ⅱ) removal from water using Fe-coated bamboo charcoal with the assistance of microwaves

作     者：Zengsheng Zhang Xuejiang Wang Yin Wang Siqing Xia Ling Chen Yalei Zhang Jianfu Zhao 

作者机构：State Key Laboratory of Pollution Control and Resources ReuseCollege of Environmental Science and EngineeringTongji University 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2013年第25卷第5期

页      面：1044-1053页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the National Key Technology R&D Program of China (No. 2012BAJ21B01) 

主　　题：adsorption bamboo charcoal microwave assistance kinetics adsorption isotherms 

摘      要：Bamboo charcoal（BC） was used as starting material to prepare iron-modified bamboo charcoal（Fe-MBC） by its impregnation in FeCl 3 and HNO 3 solutions simultaneously,followed by microwave *** material can be used as an adsorbent for Pb（Ⅱ） contaminants removal in *** composites were prepared with Fe molar concentration of 0.5,1.0 and 2.0 mol/L and characterized by means of N 2 adsorption-desorption isotherms,X-ray diffraction spectroscopy（XRD）,scanning electron microscopy coupled with energy dispersive X-ray spectrometry（SEM-EDS）,Fourier transform infrared（FT-IR） and point of zero charge（pH pzc） *** adsorption analyses showed that the BET specific surface area and total pore volume increased with iron *** adsorbent with Fe molar concentration of 2 mol/L（2Fe-MBC） exhibited the highest surface area and produced the best pore *** Pb（Ⅱ） adsorption process of 2Fe-MBC and BC were evaluated in batch experiments and 2Fe-MBC showed an excellent adsorption capability for removal Pb（Ⅱ）.The adsorption of Pb（Ⅱ） strongly depended on solution pH,with maximum values at pH *** ionic strength had a significant effect on the adsorption at pH 〈 *** adsorption isotherms followed the Langmuir isotherm model well,and the maximum adsorption capacity for Pb（Ⅱ） was 200.38 mg/g for *** adsorption processes were well fitted by a pseudo second-order kinetic *** parameters showed that the adsorption of Pb（Ⅱ） onto Fe-MBC was feasible,spontaneous,and exothermic under the studied conditions,and the ion exchange mechanism played an significant *** results have important implications for the design of low-cost and effective adsorbents in the removal of Pb（Ⅱ） from wastewater.