Enhanced removal of arsenic and fouling mitigation of nanofiltration process via coagulation pretreatment

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

	Enhanced removal of arsenic and fouling mitigation of nanofiltration process via coagulation pretreatment
	Zhao, Changwei; Yu, Ling; Xu, Lili; Yu, Yang
刊名	DESALINATION AND WATER TREATMENT
	2020-03
卷号	181 页码:369-375
关键词	Arsenate Arsenite Coagulation Nanofiltration Enhanced removal efficiency Fouling mitigation
ISSN号	1944-3994
英文摘要	Arsenic contamination has been considered as one of the serious environmental issues around the world. In this study, the conventional chemical coagulation was applied as pretreatment of the nanofiltration process to enhance the removal efficiency of arsenite (As(III)) and arsenate (As(V)) and mitigate the membrane fouling. Three types of coagulants including aluminum chloride (AlCl3), polyaluminium chloride and ferric chloride (FeCl3) were compared. More than 80% of As(V) could be removed by coagulation, nanofiltration, and their combined process, whereas nanofiltration or coagulation using aluminium-based coagulants only achieved approximately 10% of removal efficiency of As(III). FeCl3 was proven to be the most effective coagulant to remove both As(V) and As(III) with the removal efficiency of 99% and 95%, respectively. The coagulation pretreatment was able to significantly reduce the declining trend of water flux. The formed fouling layer on the membrane surface after the treatment was investigated by a field-emission scanning electron microscopy. Compared to the case of direct filtration of humic acid solution, a more loose and permeable fouling layer could be formed when coagulation was used as a pretreatment process.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44936]
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	Zhao, Changwei,Yu, Ling,Xu, Lili,et al. Enhanced removal of arsenic and fouling mitigation of nanofiltration process via coagulation pretreatment[J]. DESALINATION AND WATER TREATMENT,2020,181:369-375.
APA	Zhao, Changwei,Yu, Ling,Xu, Lili,&Yu, Yang.(2020).Enhanced removal of arsenic and fouling mitigation of nanofiltration process via coagulation pretreatment.DESALINATION AND WATER TREATMENT,181,369-375.
MLA	Zhao, Changwei,et al."Enhanced removal of arsenic and fouling mitigation of nanofiltration process via coagulation pretreatment".DESALINATION AND WATER TREATMENT 181(2020):369-375.