Migration of manganese and iron during the adsorption-regeneration cycles for arsenic removal

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

	Migration of manganese and iron during the adsorption-regeneration cycles for arsenic removal
	Chang, Fangfang ; Qu, Jiuhui ; Zhao, Xu ; Liu, Wenjun ; Wu, Kun
刊名	FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING IN CHINA
	2011-12-01
卷号	5 期号:4 页码:512—518
中文摘要	Fe-Mn binary oxide incorporated into porous diatomite (FMBO-diatomite) was prepared in situ and regenerated in a fixed-bed column for arsenite [As(III)] and arsenate [As(V)] removal. Four consecutive adsorption cycles were operated under the following conditions: Initial arsenic concentration of 0.1 mg center dot L(-1), empty bed contact time of 5 min, and pH 7.0. About 3000, 3300, 3800, and 4500 bed volumes of eligible effluent (arsenic concentration a (c) 1/2 0.01 mg center dot L(-1)) were obtained in four As (III) adsorption cycles; while about 2000, 2300, 2500, and 3100 bed volumes of eligible effluent were obtained in four As(V) adsorption cycles. The dissection results of FMBO-diatomite fixed-bed exhibited that small amounts of manganese and iron were transferred from the top of the fixed-bed to the bottom of the fixed-bed during As(III) removal process. Compared to the extremely low concentration of iron (< 0.01 mg center dot L(-1)), the fluctuation concentration of Mn(2+) in effluent of the As(III) removal column was in a range of 0.01-0.08 mg center dot L(-1). The release of manganese suggested that manganese oxides played an important role in As(III) oxidation. Determined with the US EPA toxicity characteristic leaching procedure (TCLP), the leaching risk of As(III) on exhausted FMBO-diatomite was lower than that of As(V).
WOS记录号	WOS:000297749600004
公开日期	2012-10-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/6968]
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	Chang, Fangfang,Qu, Jiuhui,Zhao, Xu,et al. Migration of manganese and iron during the adsorption-regeneration cycles for arsenic removal[J]. FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING IN CHINA,2011,5(4):512—518.
APA	Chang, Fangfang,Qu, Jiuhui,Zhao, Xu,Liu, Wenjun,&Wu, Kun.(2011).Migration of manganese and iron during the adsorption-regeneration cycles for arsenic removal.FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING IN CHINA,5(4),512—518.
MLA	Chang, Fangfang,et al."Migration of manganese and iron during the adsorption-regeneration cycles for arsenic removal".FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING IN CHINA 5.4(2011):512—518.