Trace element remobilization following the resuspension of sediments;under controlled redox conditions: City Park Lake, Baton Rouge, LA

doi:10.1016/j.apgeochem.2012.09.008

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	Trace element remobilization following the resuspension of sediments;under controlled redox conditions: City Park Lake, Baton Rouge, LA
	Ye, Siyuan 4; Laws, Edward A.; Gambrell, Robert 2
刊名	APPLIED GEOCHEMISTRY
	2013
卷号	28 页码:91-99
ISSN号	0883-2927
DOI	10.1016/j.apgeochem.2012.09.008
英文摘要	The sediments of City Park Lake (Baton Rouge, Louisiana, USA) are characterized by Pb concentrations that exceed the corresponding National Oceanic and Atmospheric Administration probable effect level by more than a factor of two and concentrations of As, Cd, Cu, Ni and Zn that exceed the corresponding threshold effect levels. The sediments of the lake are likely to be dredged because of concern over shoaling of the lake. There is concern that exposing these sediments to an oxidizing environment could mobilize toxic metal(loid)s that are effectively sequestered under reducing conditions. To address this concern, mixtures of sediments collected from seven locations in City Park Lake were incubated in microcosms under controlled oxidizing and reducing conditions. The slurries were sampled at time intervals over a period of nearly 750 h, and the dissolved Fe, Mn and trace metal concentrations determined. Eh and pH were negatively correlated, with Eh declining by 600 mV per unit increase in pH. Of the toxic metals, only the concentration of Cu was positively correlated with Eh, apparently because of the sequestration of Cu as a very insoluble sulfide precipitate under low Eh conditions. Precipitation of the other metals as sulfides was evidently insignificant because of the low S content of the sediments. Concentrations of the remaining potentially toxic metals were negatively correlated with Eh, apparently because of their sequestration as oxides and/or adsorption to Fe oxides or oxy-hydroxides. Concentrations of Ca, Mg, and Sr were positively correlated with Eh, presumably because of their sequestration in carbonate precipitates under low Eh/high pH conditions. (C) 2012 Elsevier Ltd. All rights reserved.
学科主题	沉积学与沉积岩
WOS关键词	ACID-VOLATILE SULFIDE ; FRESH-WATER ; AQUATIC SEDIMENTS ; MN(II) OXIDATION ; MARINE SEDIMENT ; SAGUENAY FJORD ; HEAVY-METALS ; MANGANESE ; TOXICITY ; RELEASE
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000313196000010
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39929]
专题	中国地质调查局青岛海洋地质研究所
作者单位	1.Qingdao Inst Marine Geol, Qingdao, Peoples R China. 2.Laws, Edward A.] Louisiana State Univ, Sch Coast & Environm, Dept Environm Sci, Baton Rouge, LA 70803 USA. 3.Louisiana State Univ, Sch Coast & Environm, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803 USA. 4.中国地质调查局青岛海洋地质研究所
推荐引用方式 GB/T 7714	Ye, Siyuan,Laws, Edward A.,Gambrell, Robert. Trace element remobilization following the resuspension of sediments;under controlled redox conditions: City Park Lake, Baton Rouge, LA[J]. APPLIED GEOCHEMISTRY,2013,28:91-99.
APA	Ye, Siyuan,Laws, Edward A.,&Gambrell, Robert.(2013).Trace element remobilization following the resuspension of sediments;under controlled redox conditions: City Park Lake, Baton Rouge, LA.APPLIED GEOCHEMISTRY,28,91-99.
MLA	Ye, Siyuan,et al."Trace element remobilization following the resuspension of sediments;under controlled redox conditions: City Park Lake, Baton Rouge, LA".APPLIED GEOCHEMISTRY 28(2013):91-99.