Photoreduction of mercuric salt in UV/Fe (III)-oxalate complex system

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	Photoreduction of mercuric salt in UV/Fe (III)-oxalate complex system
	Deng, Lin ; Wu, Feng ; Chen, Yong ; Deng, Nansheng ; Liu, Jiantong
刊名	FRESENIUS ENVIRONMENTAL BULLETIN
	2006
卷号	15 期号:6 页码:484-488
关键词	Hg (II) Fe (III)-oxalate complex photoreduction
ISSN号	1018-4619
通讯作者	Deng, N, Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430072, Peoples R China
中文摘要	In this paper, the photochemical reduction process of Hg (II) in aqueous solution containing ferric iron and oxalate (Ox) has been studied. Under the radiation of a low-pressure mercury lamp (lambda = 253.7 nm, 8W), Fe(III)-oxalate complexes undergo photolysis to produce ferrous ions and other organic reductive species, which reduce Hg(II) subsequently. For 0.1 mg/L Hg (II), the photoreduction efficiency is comparatively higher in the solution at pH 5.0 than that over the range of 3.0 similar to 8.0. The photoreduction efficiency of Ho (II) in aqueous solution increases with increasing, initial concentration of ferric ions from 0.02 mmol/L to 0.2 mmol/L and initial concentration of oxalate from 0.96 mmol/L to 4.8 mmol/L and then gradually approaches to a steady state. CH3OH also contributes the reduction of Hg (II). We investigate the increase of the ferric, oxalate and CH3OH concentrations resulting from the increase of reduction efficiency of Hg (II). It can be seen that ferrous ions and other reactive species are reductants of Hg (II), and the reaction product with oxalate is mainly volatile metallic mercury.
英文摘要	In this paper, the photochemical reduction process of Hg (II) in aqueous solution containing ferric iron and oxalate (Ox) has been studied. Under the radiation of a low-pressure mercury lamp (lambda = 253.7 nm, 8W), Fe(III)-oxalate complexes undergo photolysis to produce ferrous ions and other organic reductive species, which reduce Hg(II) subsequently. For 0.1 mg/L Hg (II), the photoreduction efficiency is comparatively higher in the solution at pH 5.0 than that over the range of 3.0 similar to 8.0. The photoreduction efficiency of Ho (II) in aqueous solution increases with increasing, initial concentration of ferric ions from 0.02 mmol/L to 0.2 mmol/L and initial concentration of oxalate from 0.96 mmol/L to 4.8 mmol/L and then gradually approaches to a steady state. CH3OH also contributes the reduction of Hg (II). We investigate the increase of the ferric, oxalate and CH3OH concentrations resulting from the increase of reduction efficiency of Hg (II). It can be seen that ferrous ions and other reactive species are reductants of Hg (II), and the reaction product with oxalate is mainly volatile metallic mercury.
学科主题	Environmental Sciences
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	AQUEOUS-SOLUTIONS ; CHROMIUM(VI) ; FERRIOXALATE ; REDUCTION ; CITRATE ; WATER
收录类别	SCI
语种	英语
WOS记录号	WOS:000239177700003
公开日期	2010-10-13
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/152342/8906]
专题	水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文
作者单位	1.Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China 2.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
推荐引用方式 GB/T 7714	Deng, Lin,Wu, Feng,Chen, Yong,et al. Photoreduction of mercuric salt in UV/Fe (III)-oxalate complex system[J]. FRESENIUS ENVIRONMENTAL BULLETIN,2006,15(6):484-488.
APA	Deng, Lin,Wu, Feng,Chen, Yong,Deng, Nansheng,&Liu, Jiantong.(2006).Photoreduction of mercuric salt in UV/Fe (III)-oxalate complex system.FRESENIUS ENVIRONMENTAL BULLETIN,15(6),484-488.
MLA	Deng, Lin,et al."Photoreduction of mercuric salt in UV/Fe (III)-oxalate complex system".FRESENIUS ENVIRONMENTAL BULLETIN 15.6(2006):484-488.