Arsenic Species Transformation and Transportation in Arsenic Removal by Fe-Mn Binary Oxide-Coated Diatomite: Pilot-Scale Field Study

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	Arsenic Species Transformation and Transportation in Arsenic Removal by Fe-Mn Binary Oxide-Coated Diatomite: Pilot-Scale Field Study
	Wu, Kun ; Liu, Ruiping ; Liu, Huijuan ; Chang, Fangfang ; Lan, Huachun ; Qu, Jiuhui
刊名	JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE
	2011-12-01
卷号	137 期号:12 页码:1122—1127
中文摘要	The removal of arsenic (As) by iron (Fe)-manganese (Mn) binary oxide-coated diatomite (FMBO-diatomite) and the transformation and transportation of As, Fe, and Mn in a fixed-bed reactor were investigated in this pilot-scale field study (arsenite [AsdIII] = 50-80 mu g/L, arsenate [AsdV] = 40-60 mu g/L). Before regeneration, the effluent As(tot) was reduced to less than 10 mu g= L with no residual As(III). FMBO-diatomite exhibited elevated adsorptive capability of As after in situ regenerations with breakthrough bed volumes increasing from 550 to 760 bed volumes after three cycles of operation. The residual concentrations of As(III) and As(V) at different layers along the adsorption column indicated the oxidation of As(III) and the As transportation during the filter layer. Additionally, FMBO-diatomite could efficiently remove the turbidity, Fe and Mn in influents, without causing secondary pollution. Acid dilution analysis showed more Fe content and less Mn content after three cycles through the FMBO-diatomite upper layer. This was attributable to the oxidation of As(III) and Fe(II) by manganese dioxide (MnO(2)) within FMBO and the transportation of Mn(II) thereafter. The backwashing procedure led to a size classification of adsorbents. However, the FMBO-diatomite also showed increased size diameter after three cycles of operation because of the in situ regeneration. DOI: 10.1061/(ASCE)EE.1943-7870.0000432. (C) 2011 American Society of Civil Engineers.
WOS记录号	WOS:000299135300003
公开日期	2012-10-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/6963]
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	Wu, Kun,Liu, Ruiping,Liu, Huijuan,et al. Arsenic Species Transformation and Transportation in Arsenic Removal by Fe-Mn Binary Oxide-Coated Diatomite: Pilot-Scale Field Study[J]. JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE,2011,137(12):1122—1127.
APA	Wu, Kun,Liu, Ruiping,Liu, Huijuan,Chang, Fangfang,Lan, Huachun,&Qu, Jiuhui.(2011).Arsenic Species Transformation and Transportation in Arsenic Removal by Fe-Mn Binary Oxide-Coated Diatomite: Pilot-Scale Field Study.JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE,137(12),1122—1127.
MLA	Wu, Kun,et al."Arsenic Species Transformation and Transportation in Arsenic Removal by Fe-Mn Binary Oxide-Coated Diatomite: Pilot-Scale Field Study".JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE 137.12(2011):1122—1127.