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	Particle-particle interaction in water treatment: role of coagulant speciation and hydrolysis kinetic on NOM removal
	Wang, Dongsheng; Yan, Mingquan; Qu, Jiuhui; Chow, Christopher W. K.
	2008
会议名称	International Conference on Advances in Chemical Technologies for Water and Wastewater Treatment
会议日期	MAY 15-18, 2008
会议地点	Xian, PEOPLES R CHINA
英文摘要	The mechanism of natural organic matter (NOM) removal by AlCl3 and polyaluminum chloride (PACl) was investigated through bench scale tests. The fraction distributions of NOM and residual Al after coagulation in solution, colloid, and sediment were analyzed as changes of coagulant dosage and pH. The influence of NOM, coagulant dose and pH on coagulation kinetics of AlCl3 was investigated using photometric dispersion analyzer compared with PACl Monomeric Al species (Al-a) shows high ability to satisfy some unsaturated coordinate bonds of NOM to facilitate particle and NOM removal, while most of flocs formed by Ala are small and not easily settleable. Medium polymerized Al species (Al-b) can destabilize particle and NOM efficiently, while some flocs formed by Al-b are not as large and precipitative as those formed by colloidal or solid Al species (Al-c). Al-c could adsorb and remove NOM efficiently. The removal of contaminant by species of Al-a, Al-b and Al-c follows mechanisms of complexation, neutralization and adsorption, respectively. Unlike preformed Al-b in PACl, in-situ formed Al-b can remove NOM and particle more efficiently via the mechanism of further hydrolysis and transfer into Al-c during coagulation. While the presence of NOM would reduce Al-b formed in-situ due to the complexation of NOM and Al-a.
内容类型	会议论文
源URL	[http://ir.rcees.ac.cn/handle/311016/24692]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Wang, Dongsheng,Yan, Mingquan,Qu, Jiuhui,et al. Particle-particle interaction in water treatment: role of coagulant speciation and hydrolysis kinetic on NOM removal[C]. 见:International Conference on Advances in Chemical Technologies for Water and Wastewater Treatment. Xian, PEOPLES R CHINA. MAY 15-18, 2008.

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