Electrosorption of As(Ⅲ)in aqueous solutions with activated carbon as the electrode
The electrosorption of As(Ⅲ)in aqueous solutions by using activated carbon(AC)as the electrode was studied in this work.This study was performed through the measurements of adsorption and desorption,Cyclic Voltammetry(CV),Electrochemical Impedance Spectroscopy(EIS)and X-ray photoelectron spectra(XPS).Three parameters,applied voltage,solution pH and initial As(Ⅲ)concentration,on the electroso-prtion of As(Ⅲ)were investigated.The experimental results have demonstrated that the electrosorption followed three steps: migration of As(Ⅲ)to the anode,oxidation of As(Ⅲ)to As(Ⅴ)and accumulation of As(Ⅴ)in the electric double layers of the anode.The electrodorption capacity increased with increasing applied voltage and initial As(Ⅲ)concentration,whereas the effect of pH was complicated for the variation of arsenite species and the competition of OH".The oxidation of As(Ⅲ)increased with the increasing voltage and pH due to the increasing redox potential acted on As(Ⅲ).The electrosorption served to reduce the toxicity of arsenic and was a promising technology for As(Ⅲ)removal from water.
Electrosorption Oxidation of As(Ⅲ) Redox potential Arsenite removal
Min Dai Ling Xia Shaoxian Song Changsheng Peng Jose Rene Rangel-Mendez Roel Cruz-Gaona
School of Resources and Environmental Engineering,Wuhan University of Technology,Luoshi Road 122,Wuh School of Resources and Environmental Engineering,Wuhan University of Technology,Luoshi Road 122,Wuh The Key Lab of Marine Environmental Stience and Ecology of Ministry of Education,Ocean University of Division de Ingenieria Amientai,Instituto Potosino de Cientiay Tecnoiogia,San Luis Potosi,Mexico Doctorado Institutional de Ingenieria y Ciencia de Materiales,Universidad Autonoma de San Luis Potos
国内会议
广州
英文
169-169
2019-03-29（万方平台首次上网日期，不代表论文的发表时间）