Enhanced coagulation with polyaluminum chlorides: Role of pH/Alkalinity   and speciation

doi:10.1016/j.chemosphere.2008.01.019

CORC > 北京大学 > 环境科学与工程学院

	Enhanced coagulation with polyaluminum chlorides: Role of pH/Alkalinity and speciation
	Yan, Mingquan ; Wang, Dongsheng ; Yu, Jianfeng ; Ni, Jinren ; Edwards, Marc ; Qu, Huhui
刊名	chemosphere
	2008
关键词	alkalinity pH polyaluminum chloride (PACl) natural organic matter (NOM) enhanced coagulation WATER-TREATMENT ALUMINUM REMOVAL FERRON PACL
DOI	10.1016/j.chemosphere.2008.01.019
英文摘要	Enhanced coagulation is considered to be among the best available techniques (BAT) for disinfection by-product (DBP) precursor removal in water treatment. Improving existing 'understanding requires further consideration of nuances of chemical speciation relative to source water chemistry. In this paper, the effect of alkalinity/pH and speciation on inorganic polymer flocculants, polyaluminum chlorides (PACls) for enhanced particle and natural organic matter (NOM) removal was investigated. Three kinds of well-characterized typical source waters in China with low, moderate, and high alkalinity were selected. Performance of coagulants is controlled not only by preformed species but also by those formed in situ. At neutral and basic pH values, PACls with higher basicity (ratio of OH-/Al), which have more stable preformed Al-b (the rapid reacted species as in ferron assay), are more efficient for turbidity and NOM removal. At slightly acidic pH, PACls with lower basicity are more efficient since more Alb can be formed in situ. Optimal NOM removal was achieved at pH 5.5-6.5 for all PACls. Basicity, speciation, and dosage of coagulant should be optimized based on raw water alkalinity to enhance the removal efficiency of NOM. (C) 2008 Elsevier Ltd. All rights reserved.; Environmental Sciences; SCI(E); PubMed; 58; ARTICLE; 9; 1665-1673; 71
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/159014]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Yan, Mingquan,Wang, Dongsheng,Yu, Jianfeng,et al. Enhanced coagulation with polyaluminum chlorides: Role of pH/Alkalinity and speciation[J]. chemosphere,2008.
APA	Yan, Mingquan,Wang, Dongsheng,Yu, Jianfeng,Ni, Jinren,Edwards, Marc,&Qu, Huhui.(2008).Enhanced coagulation with polyaluminum chlorides: Role of pH/Alkalinity and speciation.chemosphere.
MLA	Yan, Mingquan,et al."Enhanced coagulation with polyaluminum chlorides: Role of pH/Alkalinity and speciation".chemosphere (2008).