Investigating the effect of hardness cations on coagulation: The aspect   of neutralisation through Al(III)-dissolved organic matter (DOM) binding

doi:10.1016/j.watres.2017.02.041

CORC > 北京大学 > 环境科学与工程学院

	Investigating the effect of hardness cations on coagulation: The aspect of neutralisation through Al(III)-dissolved organic matter (DOM) binding
	Zhou, Yuxuan ; Yan, Mingquan ; Liu, Ruiping ; Wang, Dongsheng ; Qu, Jiuhui
刊名	WATER RESEARCH
	2017
关键词	Aluminum Coagulation Differential absorbance spectra Dissolved organic matter Hardness cation Neutralisation DISINFECTION BY-PRODUCTS NOM REMOVAL IN-SITU COMPETITION COMPLEXATION COPPER CHROMOPHORES PARTICLE SPECTRA CALCIUM
DOI	10.1016/j.watres.2017.02.041
英文摘要	Hardness cations are ubiquitous and abundant in source water, while the effect of hardness on the performance of coagulation for dissolved organic matter (DOM) removal in water treatment remains unclear due to the limitation of methods that can characterise the subtle interactions between DOM, coagulant and hardness cations. This work quantified the competition between coagulant Al3+ and hardness cations to bind onto DOM using absorbance spectroscopy acquired at different Al3+ concentrations in the absence and presence of Ca2+ or Mg2+. The results indicate that, in the presence of either Mg2+ or Ca2+, an increasing depression of the binding of Al3+-DOM could be observed in the differential spectra of DOM with the increasing of Mg2+ or Ca2+ at a level of 10, 100 and 1000 mu M, with the observation being more significant at higher pH from 6.5 to 8.5. The results of zeta potentials of DOM indicate that the competition of hardness cations results in the negative DOM being less efficiently neutralised by Al3+. This study demonstrates that the removal of DOM by coagulation would significantly deteriorate with the presence of hardness cations, which would compete with coagulant Al3+ to neutralise the unsaturated sites in DOM. (C) 2017 Elsevier Ltd. All rights reserved.; China NSF [51578007]; Shenzhen science and technology plan [JCYJ20160308103848156]; SCI(E); ARTICLE; 22-28; 115
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/473418]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Zhou, Yuxuan,Yan, Mingquan,Liu, Ruiping,et al. Investigating the effect of hardness cations on coagulation: The aspect of neutralisation through Al(III)-dissolved organic matter (DOM) binding[J]. WATER RESEARCH,2017.
APA	Zhou, Yuxuan,Yan, Mingquan,Liu, Ruiping,Wang, Dongsheng,&Qu, Jiuhui.(2017).Investigating the effect of hardness cations on coagulation: The aspect of neutralisation through Al(III)-dissolved organic matter (DOM) binding.WATER RESEARCH.
MLA	Zhou, Yuxuan,et al."Investigating the effect of hardness cations on coagulation: The aspect of neutralisation through Al(III)-dissolved organic matter (DOM) binding".WATER RESEARCH (2017).