净水技术2025，Vol.44Issue(2)：112-123,12.DOI:10.15890/j.cnki.jsjs.2025.02.013
基于铝与石墨阴极调控对比的铝电絮凝工艺对水中磷酸盐的去除
Aluminum Electrocoagulation Process for Phosphates Removal in Water Based on Aluminum and Graphite Cathodes Regulation
摘要
Abstract
[Objective]In order to solve the eutrophication of water bodies caused by excessive discharge of phosphorus in wastewater,source treatment is used as an important measure to reduce phosphorus pollution.[Methods]In this paper,aluminum electrocoagulation(Al-EC)technology was used to remove phosphorus from water.However,the traditional aluminum-aluminum electrocoagulation(Al-Al EC)had the problems of large electrode loss,high power consumption,and high mud production.In this paper,by replacing the cathode with inert graphite material,the electrode loss,power consumption,and mud production in the Al electrocoagulation process were greatly reduced,while it had a good phosphorus removal effect,effectively realizing the purpose of simultaneous pollution reduction and consumption reduction.The influence of main factors(current density,initial pH and NaCl concentration)on the two kinds of Al-EC was investigated,the differences in the flocs of the two kinds of Al-EC were compared by using scanning electron microscopy/energy dispersive X-ray spectroscopy,X-ray diffraction,determination of zeta potential by Malvern zeta potential meter,hydrogen evolution reaction(HER)activity,and the BET method.[Results]The results indicated that the flocs produced by Al-Al EC were trihydrate alumina,and the flocs produced by Al-graphite electrocoagulation(Al-G EC)were boehmite.The zeta potential of Al-G EC was higher than that of Al-Al EC,which was conducive to the removal of negatively charged phosphates.And the hydrogen evolution reaction(HER)activity of the aluminum cathode(644 mV)was significantly higher than that of the graphite cathode(1,095 mV),so the Al-G EC had lower pH than that Al-Al EC,and the pore size as well as the BET specific surface area of the Al-G EC flocs were smaller than that of Al-Al EC,resulting in a higher water content in the Al-Al EC flocs.[Conclusion]Al-G EC is a promising electrocoagulation technology with lower operating cost and better removal efficiency than Al-Al EC.关键词
除磷/铝电絮凝/石墨阴极/调控/减污降耗Key words
phosphorus removal/aluminum electrocoagulation(Al-EC)/graphite cathode/regulation/pollution and consumption reduction分类
资源环境引用本文复制引用
王亚超,张广,张欣桐,李杰,张浩,吕建波..基于铝与石墨阴极调控对比的铝电絮凝工艺对水中磷酸盐的去除[J].净水技术,2025,44(2):112-123,12.基金项目
山东省自然科学基金(ZR2019MEE046) （ZR2019MEE046）
