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学科主题: Environmental Sciences; Meteorology & Atmospheric Sciences; Water Resources
题名: Mobilization potential of heavy metals: A comparison between river and lake sediments
作者: Fang, T; Liu, JT; Xiao, BD; Chen, XG; Xu, XQ
通讯作者: Liu, JT, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
关键词: acid-volatile sulfides ; heavy metals ; mobilization ; overlaying water ; sediment
刊名: WATER AIR AND SOIL POLLUTION
发表日期: 2005-02-01
DOI: 10.1007/s11270-005-4284-9
卷: 161, 期:1-4, 页:209-225
收录类别: SCI
文章类型: Article
部门归属: Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
类目[WOS]: Environmental Sciences ; Meteorology & Atmospheric Sciences ; Water Resources
研究领域[WOS]: Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Water Resources
摘要: Toxic metals introduced into aquatic environments by human activities accumulation in sediments. A common notion is that the association of metals with acid volatile sulfides (AVS) affords a mechanism for partitioning metals from water to solid phase, thereby reducing biological availability. However, variation in environmental conditions can mobilize the sediment-bound metal and result in adverse environmental impacts. The AVS levels and the effect of AVS on the fate of Cu, Cd, Zn, Ni in sediments in the the Changjiang River, a suboxic river with sandy bottom sediment and the Donghu Lake, a anoxic lake with muddy sediment in China, were compared through aeration, static adsorption and release experiments in laboratory. Sips isotherm equation, kinetic equation and grade ion exchange theory were used to describe the heavy metal adsorb and release process. The results showed that AVS level in the lake sediment are higher than that of the river. Heavy metals in the overlying water can transfer to sediments incessantly as long as the sediment remains undisturbed. The metal release process is mainly related to AVS oxidation in lake sediment while also related to Org-C and Fe-Mn oxyhydroxide oxidation in river sediment. The effect of sulfides on Zn and Ni is high, followed by Cd, and Cu is easy bound to Org-C. AVS plays a major role in controlling metals activity in lake sediment and its presence increase the adsorption capacity both of the lake and river sediments.
英文摘要: Toxic metals introduced into aquatic environments by human activities accumulation in sediments. A common notion is that the association of metals with acid volatile sulfides (AVS) affords a mechanism for partitioning metals from water to solid phase, thereby reducing biological availability. However, variation in environmental conditions can mobilize the sediment-bound metal and result in adverse environmental impacts. The AVS levels and the effect of AVS on the fate of Cu, Cd, Zn, Ni in sediments in the the Changjiang River, a suboxic river with sandy bottom sediment and the Donghu Lake, a anoxic lake with muddy sediment in China, were compared through aeration, static adsorption and release experiments in laboratory. Sips isotherm equation, kinetic equation and grade ion exchange theory were used to describe the heavy metal adsorb and release process. The results showed that AVS level in the lake sediment are higher than that of the river. Heavy metals in the overlying water can transfer to sediments incessantly as long as the sediment remains undisturbed. The metal release process is mainly related to AVS oxidation in lake sediment while also related to Org-C and Fe-Mn oxyhydroxide oxidation in river sediment. The effect of sulfides on Zn and Ni is high, followed by Cd, and Cu is easy bound to Org-C. AVS plays a major role in controlling metals activity in lake sediment and its presence increase the adsorption capacity both of the lake and river sediments.
关键词[WOS]: ACID-VOLATILE SULFIDE ; QUALITY CRITERIA ; TECHNICAL BASIS ; CADMIUM ; BIOAVAILABILITY ; TOXICITY
语种: 英语
WOS记录号: WOS:000228894400013
ISSN号: 0049-6979
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/9272
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China

Recommended Citation:
FANG TAO; LIU JIANTONG; XIAO BANGDING; CHEN XIAOGUO and XU XIAOQING.Mobilization potential of heavy metals: A comparison between river and lake sediments,WATER AIR AND SOIL POLLUTION,2005,161(1-4):209-225
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