烟台大学学报（自然科学与工程版）2025，Vol.38Issue(2)：239-248,10.DOI:10.13951/j.cnki.37-1213/n.231113
以石墨为阴极的铝电絮凝去除水中五价砷
Arsenate Removal from Water by Aluminum Electrocoagulation Using Graphite as Cathode
摘要
Abstract
To address the issues of high dissolved aluminum concentration,rapid pH rise,high aluminum electrode plate loss,and high operating costs in traditional aluminum-aluminum electrocoagulation for arsenic removal,differ-ent materials(including several metals,stainless steel,and graphite)were used as cathodes to compare their effects on the performance of aluminum anode electrocoagulation for removing pentavalent arsenic from water,resul-ting in the selection of graphite as the optimal cathode material.The impacts of electrode spacing,current density,initial pH,and electrolyte types on the efficiency and economic indicators of aluminum-graphite electrocoagulation for removing arsenate were further investigated.The results showed that the electrode spacing had no significant effect on the arsenic removal;current density was positively correlates with the rate of arsenic removal;the removal rate of arsenic was the fastest when the initial pH was 7,but the aluminum plate loss was also the highest;the re-moval rate of arsenic was the highest without an electrolyte,but the operating cost was the lowest when the electro-lyte was NaNO3.The differences in aluminum species and flocs produced by aluminum-aluminum electrocoagulation and aluminum-graphite electrocoagulation were analyzed using the Ferron method,XRD,Zeta potential,FT-IR spectrum,and BET.The result indicated that the aluminum species in the flocs produced by aluminum-graphite electrocoagulation were more beneficial for arsenic removal.Additionally,the electrode behaviors,including corro-sion performance,electrochemical impedance spectra,and hydrogen evolution reaction during the electrocoagula-tion progress,were examined using an electrochemical workstation.The results showed that the flocs produced by the aluminum-graphite electrocoagulation had a smaller specific surface area,pore size and lower water content,which is conducive to the subsequent sludge treatment.关键词
电絮凝/阴极材料/砷/经济性指标Key words
electrocoagulation/cathode material/arsenic/economic indicator分类
资源环境引用本文复制引用
王亚超,曹玉敏,张伟,张欣桐,蒋海成,吕建波..以石墨为阴极的铝电絮凝去除水中五价砷[J].烟台大学学报（自然科学与工程版）,2025,38(2):239-248,10.基金项目
山东省自然科学基金资助项目(ZR2019MEE046). （ZR2019MEE046）
