Efficient adsorption to hexavalent chromium by iron oxalate modified D301:Characterization,performance and mechanisms  

作　　者：Dongmei Jia Huamin Cai Yongzheng Duan Jiangbao Xia Jia Guo 

机构地区：[1]School of Chemical Engineering and Safety,Binzhou University,Binzhou 256603,China [2]School of Chemical Engineering and Pharmaceutical,Wuhan Institute of Technology,Wuhan 430073,China [3]Shandong Key Laboratory of Eco-Environmental Science for the Yellow River Delta,Binzhou University,Binzhou 256603,China

出　　处：《Chinese Journal of Chemical Engineering》2021年第5期61-69,共9页中国化学工程学报（英文版）

基　　金：The research has been funded by the National Key Research&Development Program of China(2017YFC0505904);National Natural Science Foundation of China(51808040);Taishan Scholars Program of Shandong Province.

摘　　要：Chromium is a common harmful pollutant with high toxicity and low bearing capacity of soil and water.Excellent salinity resistance,a wide pH range,and high regeneration capacity were essential for qualified adsorbents used in removing hexavalent chromium(Cr(VI))from polluted water.Herein,iron oxalate modified weak basic resin(IO@D301)for the removal of Cr(VI)was prepared by the impregnation method.The IO@D301 was characterized by scanning electron microscope(SEM),Fourier transform infrared spectroscopy(FTIR),X-Ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).Owing to abundant amine,carboxyl groups and iron ions existing on the surface,IO@D301 possesses high adsorption and salinity resistance capacity for Cr(VI).The maximum adsorption capacity of IO301 towards Cr(VI)reached 201.30 mg·g^(-1) at 293 K and a pH of 5.The adsorption equilibrium was well fitted by the Freundlich model,and the adsorption process was described by the pseudofirst-order kinetics model as spontaneous and exothermic.The mechanism may be identified as electrostatic attraction,coordination,and reduction,which was confirmed by FT-IR and X-ray photoelectron spectroscopy.

关 键 词：D301 IRON OXALATE CHROMIUM ADSORPTION 

分 类 号：X703[环境科学与工程—环境工程] TQ424[化学工程]