Multistage remediation of heavy metal contaminated river sediments in a mining region based on particle size

doi:10.1016/j.chemosphere.2019.03.018

YIC-IR > 中国科学院海岸带环境过程与生态修复重点实验室 > 海岸带环境工程技术研究与发展中心

	Multistage remediation of heavy metal contaminated river sediments in a mining region based on particle size
	Ma, T ; Sheng, YQ; Meng, YJ ; Sun, JZ
发表期刊	CHEMOSPHERE
ISSN	0045-6535
	2019-06
卷号	225 页码:83-92
关键词	Particle size Heavy metal Sediment Classification treatment Mining area
研究领域	Environmental Sciences
DOI	10.1016/j.chemosphere.2019.03.018
产权排序	[Ma, Tao; Sheng, Yanqing] Chinese Acad Sci, Res Ctr Coastal Environm Engn Technol Shandong Pr, Yantai Inst Coastal Zone Res, Yantai 264000, Peoples R China; [Ma, Tao; Meng, Yingjie; Sun, Jianzhang] Shandong Acad Environm Sci Co LTD, Jinan 250100, Shandong, Peoples R China
通讯作者	Ma, Tao() ; Sheng, Yanqing(yqsheng@yic.ac.cn)
作者部门	海岸带环境工程技术研究与发展中心
英文摘要	Sediment pollution is an important environmental problem, and the remediation of heavy metal contaminated sediments is crucial to river ecosystem protection, especially in mining regions. In this work, characteristics of heavy metals (Cu, Zn, Cd, As and Hg) were investigated, including contents and fractions based on particle size (PS) in river sediments. Chemical leaching and stabilization for sediment remediation were performed, and the technology feasibility was assessed. The results indicated that the heavy metals were primarily reserved within fine sediments (PS < 75 mu m), comprising 79.8% of the total. For the sequentially extracted fractions, residual fraction dominated the total content in large PS sections (PS > 150 mu m), while the oxidizable fraction, reducible fraction and weak acid extractable fraction dominated the total content in fine sediments, except for that of Hg. Chemical leaching can transform most metals in sediments from large-sized particles to fine particles because the metals are absorbed by fine particles in solution rather than complexation. The stabilization suggested that cement could be an effective agent for ecological risk control for heavy metals. In field engineering, a total of 145,000 m(3) sediment was divided into various sections by PS and synchronously washed by eluting agents. Finally, clean sediments (PS > 150 mu m) were used as building material and clean backfilling; meanwhile, heavily polluted sediments (PS < 150 mu m) were buried as general industrial solid waste after stabilization treatment. Over 90% of the contaminated sediments were reused throughout multistep remediation. Furthermore, a reduction in waste and harm, along with resources, was obtained. This study provided a feasible technology for heavy metal contaminated sediment remediation. (C) 2019 Elsevier Ltd. All rights reserved.
文章类型	Article
资助机构	Strategic Priority Research Program of the Chinese Academy of SciencesChinese Academy of Sciences [XDA23050203] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China [41373100] ; CAS Key Technology Talent Program ; Instrument Developing Project of the Chinese Academy of Sciences [Y728021021]
收录类别	SCI
语种	英语
关键词[WOS]	SURFACE SEDIMENTS ; SOILS ; SPECIATION ; BAY ; PB ; CR ; CD ; NI ; CO ; CU
研究领域[WOS]	Environmental Sciences
WOS记录号	WOS:000467668500010
引用统计	被引频次：31[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/24934
专题	中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境工程技术研究与发展中心中国科学院海岸带环境过程与生态修复重点实验室
作者单位	1.Chinese Acad Sci, Res Ctr Coastal Environm Engn Technol Shandong Pr, Yantai Inst Coastal Zone Res, Yantai 264000, Peoples R China; 2.Shandong Acad Environm Sci Co LTD, Jinan 250100, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Ma, T,Sheng, YQ,Meng, YJ,et al. Multistage remediation of heavy metal contaminated river sediments in a mining region based on particle size[J]. CHEMOSPHERE,2019,225:83-92.
APA	Ma, T,Sheng, YQ,Meng, YJ,&Sun, JZ.(2019).Multistage remediation of heavy metal contaminated river sediments in a mining region based on particle size.CHEMOSPHERE,225,83-92.
MLA	Ma, T,et al."Multistage remediation of heavy metal contaminated river sediments in a mining region based on particle size".CHEMOSPHERE 225(2019):83-92.

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