On-Site Solidification/Stabilization of Cd, Zn, and Pb Co-Contaminated Soil Using Cement: Field Trial at Dongdagou Ditch, Northwest China

doi:10.1089/ees.2017.0355

	On-Site Solidification/Stabilization of Cd, Zn, and Pb Co-Contaminated Soil Using Cement: Field Trial at Dongdagou Ditch, Northwest China
	Fei, Yang 1,2; Yan, Xiulan 1; Zhong, Lirong 3; Li, Fasheng 4; Du, Yanjun 5; Li, Chunping 6,7; Lv, Haoyang 1; Li, Yonghua 1
刊名	ENVIRONMENTAL ENGINEERING SCIENCE
	2018-12-01
卷号	35 期号:12 页码:1329-1339
关键词	bearing capacity cement field trial heavy metals leaching toxicity solidification/stabilization
ISSN号	1092-8758
DOI	10.1089/ees.2017.0355
通讯作者	Yan, Xiulan(yanxl@igsnrr.ac.cn)
英文摘要	Dongdagou Ditch in Baiyin City was one of the key demonstration areas for remediation of heavy metal contamination in China. Solidification/stabilization (S/S) is an appropriate technology that has positive impact on both leaching and strength performance of the riverbed site. This field trial was designed to investigate the long-term S/S effects and mechanism of ordinary Portland cement (OPC) on Cd, Zn, and Pb co-contaminated soil in Dongdagou Ditch, and to evaluate the influence of groundwater and low temperature. Leaching tests showed that 8 wt.%-OPC could effectively stabilize Cd, Zn, and Pb by 99.9%, 99.4%, and 67.9%, respectively, higher compared with 5 wt.%-OPC treatment, and had long-term stability. The bearing capacities of the OPC-treated soil reached 0.75-0.92 Mpa and met the USEPA (United States Environmental Protection Agency) standard for landfill disposal. Cd, Zn, and Pb were chemically stabilized and physically encapsulated by OPC simultaneously, the unstable acid-extractable Cd and Zn in soil were transformed into residual fraction after OPC treatment, and insoluble sulfides such as PbS and ZnS were specially formed due to high groundwater table of the site. In this field trial, groundwater showed negative effects on both leaching and strength properties of the OPC-treated soil due to anaerobic conditions and structural damage of S/S products. The 5 wt.%-OPC S/S effects on Cd and Zn decreased to 72.3% and 63.4%, respectively, and the soil strength reduced by 0.08-0.11 MPa below groundwater table. On-site S/S remediation with OPC was insensitive to low temperature, so that it was suitable for application in the cold Northwest China.
WOS关键词	CHARACTERISTIC LEACHING PROCEDURE ; PORTLAND-CEMENT ; HEAVY-METALS ; IMMOBILIZATION ; STABILIZATION ; LEAD ; STABILIZATION/SOLIDIFICATION ; PERFORMANCE ; BEHAVIOR ; ASH
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	MARY ANN LIEBERT, INC
WOS记录号	WOS:000451977900007
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/51566]
专题	中国科学院地理科学与资源研究所
通讯作者	Yan, Xiulan
作者单位	1.Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, Inst Geog Sci & Nat Resources Res, 11A Datun Rd, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA USA 4.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing, Peoples R China 5.Southeast Univ, Inst Geotech Engn, Nanjing, Jiangsu, Peoples R China 6.Beijing Res Acad Bldg Mat Sci, Beijing, Peoples R China 7.State Key Lab Solid Waste Resources Utilizat & En, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Fei, Yang,Yan, Xiulan,Zhong, Lirong,et al. On-Site Solidification/Stabilization of Cd, Zn, and Pb Co-Contaminated Soil Using Cement: Field Trial at Dongdagou Ditch, Northwest China[J]. ENVIRONMENTAL ENGINEERING SCIENCE,2018,35(12):1329-1339.
APA	Fei, Yang.,Yan, Xiulan.,Zhong, Lirong.,Li, Fasheng.,Du, Yanjun.,...&Li, Yonghua.(2018).On-Site Solidification/Stabilization of Cd, Zn, and Pb Co-Contaminated Soil Using Cement: Field Trial at Dongdagou Ditch, Northwest China.ENVIRONMENTAL ENGINEERING SCIENCE,35(12),1329-1339.
MLA	Fei, Yang,et al."On-Site Solidification/Stabilization of Cd, Zn, and Pb Co-Contaminated Soil Using Cement: Field Trial at Dongdagou Ditch, Northwest China".ENVIRONMENTAL ENGINEERING SCIENCE 35.12(2018):1329-1339.