Performance of Magnetic Field Coupled with Electrochemical Process for Preparing Polyaluminum Chloride

Authors

Ke-wu PI, College of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China;College of Chemical and Environmental Engineering,Hubei University of Technology,Wuhan 430068,China;
Wen-qi GONG, College of Chemical and Environmental Engineering,Hubei University of Technology,Wuhan 430068,China;
Zheng-qing HUANG, College of Chemical and Environmental Engineering,Hubei University of Technology,Wuhan 430068,China;

Abstract

Polyaluminum chloride(PAC) was prepared by electrochemical process coupled with magnetic field paralleling to the gravitation direction.The electrolyte of 0.1 M AlCl3 solution was used,with the iron plates as cathode and aluminum sheets as anode.PAC of 0.6 M total aluminum(AlT),83.2% Alb to AlT and basicity(Ba)=2.4 was synthesized when magnetic flux density was 0.4T,the distance of electrodes was 15 mm,the voltage of electrolysis cell was 2.4 V and current density was 300 A/m2.Under above experimental conditions,the voltage efficiency,energy efficiency and electrodes surface area to reduction cells of electrochemical reactor were 85.2%,81.5% and 140.1m2/m3,respectively.The polarization curves determined by constant-current method showed that the presence of magnetic flux density had prohibited the electrodes from polarization and increased the matter dissolution rate of the electrodes which was strengthened with the increased intensity of magnetic field.

Keywords

magnetic field, electrochemistry, polyaluminum chloride(PAC), polarization prohibition

DOI Link

https://doi.org/10.61558/2993-074X.1914

Publication Date

2008-08-28

Online Available Date

2008-08-28

Revised Date

2008-08-28

Received Date

2008-08-28

Recommended Citation

Ke-wu PI, Wen-qi GONG, Zheng-qing HUANG. Performance of Magnetic Field Coupled with Electrochemical Process for Preparing Polyaluminum Chloride[J]. Journal of Electrochemistry, 2008 , 14(3): 319-324.
DOI: 10.61558/2993-074X.1914
Available at: https://jelectrochem.xmu.edu.cn/journal/vol14/iss3/18

References

[1]Odegaard H,Fettig J,Ratnaweera H C.Coagulationwith prepolymerized metal salts in chemical water andwastewater treatment[M].New York:Spingger-Ver-iage,1990.189-220.
[2]Van Benschoten J E,Edzwald J K.Chemical aspects ofcoagulation using aluminum salts-I.Hydrolytic reactionsof alum and polyaluminum chloride[J].Water Res,1990,24(12):15l9-l526.
[3]Sinha S,Yoon Y,Amy G,et a1.Determining the effec-tiveness of conventional and alternative coagulantsthrough effective characterization schemes[J].Chemo-sphere,2004,57(9):11l5-l122.
[4]Xu Y,Wang D S,Liu H,et al.Optimization of theseparation and purification of Al13[J].Colloids andSurfaces A:Physicochemical Eng Aspects,2003.231(3):1-9.
[5]Wang S L,Wang MK,Tou Y M.Effect of temperatureon formation and transformation of hydrolytic aluminumin aqueous solutions[J].Colloids and Surfaces A:Physicochemical Eng Aspects,2003,231(1):143-157.
[6]Gao B Y,Chu Y B,Yue Q Y,et a1.Characterizationand coagulation of a poly-aluminum chloride(PAC)co-agulant with high Al13content[J]J Environ Manage,2005,76(2):143-147.
[7]Buffle J,Parthasarathy N,Haerdi W.Importance ofspeciation methods in analytical control of water treat-ment processes with application to fluoride removal fromwastewater[J].Water Res,1985,19(1):7-23.
[8]Tang HX,Luan Z K.Features and mechanism for co-agulation flocculation processes of poly-aluminum chlo-ride[J].Journal of Environmental Science,1995,7(2):204-21l.
[9]Zhao Hua-zhang(赵华章),Cai Gu-ping(蔡固平).Synthesis of high-concentration polyaluminum chlo-ride and its aluminium species distribution and trans-formation[J].Environmental Science,2004,25(5):80-83.
[10]Zhao Hua-zhang(赵华章),Peng Feng-xian(彭凤仙),Luan Zhao-kun(栾兆坤),et al.The improve-ment on the microinjection of base method for synthe-sizing plyaluminum chloride(PAC)and the discussionon the formation mechanism of Al13species[J].En-vironmental Chemistry,2004,23(2):202-207.
[11]He Xi-hui(何锡辉),Zhu Hong-tao(朱红涛),PengChang-rong(彭昌荣),et al.Study on electrochemi-cal preparation of polyaluminum chloride[J].Journalof Sichuan University(Natural Science Edition),2006,43(5):1088-1092.
[12]Qu Jiu-hui(曲久辉),Lu Guang-jie(路光杰).Thepolarization characteristics in preparing flocculent byelectrolysis process[J].Acta Scientiae Circumstanti-ae,1997,17(4):423-428.
[13]LZhan-peng(吕战鹏),Huang De-lun(黄德伦),Yang Wu(杨武).Uneven anodic dissolution of ironinduced by magnetic field[J].Electrochemistry,2001,7(3):326-331.
[14]Pi Ke-wu(皮科武),Huang Zheng-qing(黄征青).Research on the effect of synthesis of Al-based coagu-lants by pulse auto-rearrange able electrodes electroly-sis through adding poly SiO32-and SO42-ions[J].Journal of Hubei Polytechnic University,2005,20(4):65-67.
[15]Wang Dong-sheng(王东升),Tang Hong-xiao(汤鸿霄).Characterization of coagulation flocculation spe-cies in the particle system:The application of ferronmethod[J].Environmental Science,1999,20(5):1-5.
[16]Liu Yong-hui(刘永辉).Measure techniques of electro-chemistry[M].Beijing:Aviation Press of Beijing,1987.
[17]Zhu You-chun(朱又春),Wu Song-ping(吴松平),Lin Jian-min(林建民),et al.Electrode behavior inthe process of magnet electrolysis for industrialwastewater treatment[J].Environmental Science,1995,16(5):6-9.