Influence of coagulation mechanisms on the residual aluminum - The roles of coagulant species and MW of organic matter

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Influence of coagulation mechanisms on the residual aluminum - The roles of coagulant species and MW of organic matter
	Jiao, Ruyuan; Xu, Hui; Xu, Weiying; Yang, Xiaofang; Wang, Dongsheng
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2015-06-15
卷号	290 期号:0 页码:16-25
关键词	Molecular weight Organic matter Aluminum species Residual aluminum Coagulation mechanism
英文摘要	Aluminum (Al) based coagulants are widely used in coagulation process to enhance the removal of turbidity and dissolved substances in the drinking water treatment. However, it raised more concerns due to the increase of residual aluminum in treated water, which can cause even more issues. In this study, the effects of organic matter molecular weight and coagulants species on the concentration and aluminum distribution in residual aluminum were investigated, The residual aluminum concentration decreases as the organic matter (OM) molecular weight (MW) rises. Charge neutralization mechanism was found to be the most important factor that determines the residual aluminum concentration directly. Basically, higher Al-a percentage leads to lower residual Al concentration at acidic conditions, and Al-b/Al-c plays an important role in controlling the residual Al concentration at neutral and alkaline condition. The flocs structures formed by charge neutralization mechanism will be more compact for the mid and high MW OM, and fractal dimension (D-f) was important to reflect the dissolved residual aluminum rather than the flocs size. The total dissolved residual aluminum concentration of Al-13 and Al-30 was mainly contributed by the fractions with low and/or high MW, especially by the fraction with MW range of 0-1 kDa. (C) 2015 Elsevier B.V. All rights reserved.
研究领域[WOS]	Engineering, Environmental ; Engineering, Civil ; Environmental Sciences
WOS记录号	WOS:000353097000003
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32792]
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	Jiao, Ruyuan,Xu, Hui,Xu, Weiying,et al. Influence of coagulation mechanisms on the residual aluminum - The roles of coagulant species and MW of organic matter[J]. JOURNAL OF HAZARDOUS MATERIALS,2015,290(0):16-25.
APA	Jiao, Ruyuan,Xu, Hui,Xu, Weiying,Yang, Xiaofang,&Wang, Dongsheng.(2015).Influence of coagulation mechanisms on the residual aluminum - The roles of coagulant species and MW of organic matter.JOURNAL OF HAZARDOUS MATERIALS,290(0),16-25.
MLA	Jiao, Ruyuan,et al."Influence of coagulation mechanisms on the residual aluminum - The roles of coagulant species and MW of organic matter".JOURNAL OF HAZARDOUS MATERIALS 290.0(2015):16-25.