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Effect of aluminum fluoride complexation on fluoride removal by coagulation
Gong, Wen-Xin; Qu, Jiu-Hui; Liu, Rui-Ping; Lan, Hua-Chun
2012
Source PublicationChemistry
ISSN0927-7757
Volume395Issue:1Pages:88-93
AbstractEffect of aluminum fluoride complexation on fluoride removal by Al salts coagulation was investigated by a series of batch experiments. Transformation of fluoride species in coagulation was studied by simultaneous determination of free fluoride and total fluoride at different pH and fluoride concentrations. Results showed that aluminum fluoride complexes dominated at low pH and high fluoride concentrations but more complexes did not represent higher fluoride removal. Comparison between coagulation with complexation and adsorption by Al(OH)(3) flocs was conducted and coagulation showed higher fluoride removal efficiency than adsorption in the pH range of 6.0-9.0. Titration test showed that Al-F complexes were coprecipitated with less OH- than Al3+. Characterization of FTIR and XPS also indicated that flocs after complexation was different from Al(OH)(3) flocs with or without fluoride. It was concluded that a new Al-F-OH coprecipitate formed in coagulation and fluoride was effectively removed by the coprecipitation. (C) 2011 Elsevier B.V. All rights reserved.
Department环境水质学国家重点实验室
KeywordFluoride Coagulation Aluminum Complexation Adsorption Coprecipitation
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Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/8129
Collection环境水质学国家重点实验室
Recommended Citation
GB/T 7714
Gong, Wen-Xin,Qu, Jiu-Hui,Liu, Rui-Ping,et al. Effect of aluminum fluoride complexation on fluoride removal by coagulation[J]. Chemistry,2012,395(1):88-93.
APA Gong, Wen-Xin,Qu, Jiu-Hui,Liu, Rui-Ping,&Lan, Hua-Chun.(2012).Effect of aluminum fluoride complexation on fluoride removal by coagulation.Chemistry,395(1),88-93.
MLA Gong, Wen-Xin,et al."Effect of aluminum fluoride complexation on fluoride removal by coagulation".Chemistry 395.1(2012):88-93.
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