Immobilization of heavy metals in contaminated soils by modified hydrochar: Efficiency, risk assessment and potential mechanisms

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 土壤环境科学实验室

	Immobilization of heavy metals in contaminated soils by modified hydrochar: Efficiency, risk assessment and potential mechanisms
	Xia, Yu ; Liu, Hongjun ; Guo, Yanchuan ; Liu, Zhengang ; Jiao, Wentao
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-10-01
卷号	685 页码:1201-1208
关键词	Soil remediation Heavy metals Hydrothermal carbonization Modified hydrochar Risk assessment
ISSN号	0048-9697
英文摘要	The modified hydrochar was prepared by a facile one-pot lime-assisted hydrothermal synthesis approach and the modified hydrochar and pristine hydrochar were investigated to immobilize the heavy metals (HMs) of Pb and Cd in contaminated soils. The results showed that the modified hydrochar exerted significantly enhanced effectiveness in immobilizing Pb and Cd comparing to pristine hydrochar, resulting from the increased surface functionality and non-crystalline properties, increased pH value and enhanced electronegativity of hydrochar. By introduction with 5% modified hydrochar, the contaminated soils showed the highest value of 34.5% (Pb) and 8.1% (Cd) reductions in leaching toxicity, and significant improvements of 95.1% (Pb) and 64.4% (Cd) were observed. In addition, the concentrations of add soluble fraction were remarkably reduced by 54.0% (Pb) and 27.0% (Cd), and the reductions were much higher than that of 29.5% (Pb) and 8.3% (Cd) for 5% pristine hydrochar treatment. The enhanced surface complexation, precipitation and cation-pi interaction played an important role in the immobilization of HMs in soils. The present study offered a novel and cost-effective approach to prepare soil amendment from waste biomass towards HMs immobilization in contaminated soils. (C) 2019 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43303]
专题	生态环境研究中心_土壤环境科学实验室
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Henan Univ, Key Lab Nat Med & Immunoengn Henan Prov, Kaifeng 475004, Henan, Peoples R China
推荐引用方式 GB/T 7714	Xia, Yu,Liu, Hongjun,Guo, Yanchuan,et al. Immobilization of heavy metals in contaminated soils by modified hydrochar: Efficiency, risk assessment and potential mechanisms[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,685:1201-1208.
APA	Xia, Yu,Liu, Hongjun,Guo, Yanchuan,Liu, Zhengang,&Jiao, Wentao.(2019).Immobilization of heavy metals in contaminated soils by modified hydrochar: Efficiency, risk assessment and potential mechanisms.SCIENCE OF THE TOTAL ENVIRONMENT,685,1201-1208.
MLA	Xia, Yu,et al."Immobilization of heavy metals in contaminated soils by modified hydrochar: Efficiency, risk assessment and potential mechanisms".SCIENCE OF THE TOTAL ENVIRONMENT 685(2019):1201-1208.