Simultaneous removal of arsenic, cadmium, and lead from soil by iron-modified magnetic biochar

doi:10.1016/j.envpol.2020.114157

	Simultaneous removal of arsenic, cadmium, and lead from soil by iron-modified magnetic biochar
	Wan, Xiaoming 1,2; Li, Chongyang 2; Parikh, Sanjai J.2
刊名	ENVIRONMENTAL POLLUTION
	2020-06-01
卷号	261 页码:10
关键词	Arsenic Biochar Cadmium Lead Magnetite Sawdust
ISSN号	0269-7491
DOI	10.1016/j.envpol.2020.114157
通讯作者	Wan, Xiaoming(wanxm.06s@igsnrr.ac.cn)
英文摘要	Effective and economically viable method to remove elevated metal(loid)s from farm and industrial lands remains a major challenge. In this study, magnetic biochar-based adsorbents with Fe3O4 particles embedded in a porous biochar matrix was synthesized via iron (Fe) treated biochar or thermal pyrolysis of Fe treated cedar sawdust. Application and separation of the adsorbent to a multi-contaminated soil slurry simultaneously removed 20-30% of arsenic, cadmium and lead within 24 h. Fast removal of multimetal(loid)s result from the decrease in all operationally defined fractions of metal(loid)s, not limited to the exchangeable fraction. The direct removal of arsenic-enriched soil particles was observed via micro X-ray fluorescence maps. Furthermore, through comparison of biochars with different production methods, it has been found that magnetization after pyrolysis treatment leads to stronger metals/metalloids adsorption with a higher q(e) (bound sorbate) than other treatments but pyrolysis after magnetization stabilized Fe oxides on the biochar surface, indicating a higher biochar recovery rate (similar to 65%), and thus a higher metal(loid)s removal efficiency. The stability of Fe oxides on the surface of biochar is the determining factor for the removal efficiency of metal(loid)s from soil. (C) 2020 Elsevier Ltd. All rights reserved.
资助项目	National Key Research and Development Program of China[2018YFC1800302] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2017075] ; China Scholarship Council (CSC)
WOS关键词	ZERO-VALENT IRON ; HEAVY-METALS ; MINING AREA ; IMMOBILIZATION ; CONTAMINATION ; REMEDIATION ; RICE ; PH ; PHYTOEXTRACTION ; BIOAVAILABILITY
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000531106500108
资助机构	National Key Research and Development Program of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; China Scholarship Council (CSC)
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/159764]
专题	中国科学院地理科学与资源研究所
通讯作者	Wan, Xiaoming
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA
推荐引用方式 GB/T 7714	Wan, Xiaoming,Li, Chongyang,Parikh, Sanjai J.. Simultaneous removal of arsenic, cadmium, and lead from soil by iron-modified magnetic biochar[J]. ENVIRONMENTAL POLLUTION,2020,261:10.
APA	Wan, Xiaoming,Li, Chongyang,&Parikh, Sanjai J..(2020).Simultaneous removal of arsenic, cadmium, and lead from soil by iron-modified magnetic biochar.ENVIRONMENTAL POLLUTION,261,10.
MLA	Wan, Xiaoming,et al."Simultaneous removal of arsenic, cadmium, and lead from soil by iron-modified magnetic biochar".ENVIRONMENTAL POLLUTION 261(2020):10.