Simultaneous adsorption and immobilization of As and Cd by birnessite-loaded biochar in water and soil

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Simultaneous adsorption and immobilization of As and Cd by birnessite-loaded biochar in water and soil
	Wang, Hong-Yan ; Chen, Peng ; Zhu, Yong-Guan ; Cen, Kuang ; Sun, Guo-Xin
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2019-03
卷号	26 期号:9 页码:8575-8584
关键词	Birnessite-loaded biochar Arsenic Cadmium Co-adsorption Soil
ISSN号	0944-1344
英文摘要	A novel biochar was prepared by loading birnessite to improve its capability to simultaneously adsorb As(III), As(V), and Cd(II) in water and soil. Layer sheet-structured birnessite was successfully loaded onto the biochar surface with increased functional groups. SEM, XRD, and FTIR combining with XPS analysis were utilized to characterize birnessite-loaded biochar and its adsorption mechanisms for As and Cd(II). The saturated adsorption capabilities of the birnessite-loaded biochar (BRB) for As(III), As(V), and Cd(II) were as large as 3543, 2412, and 9068 mg/kg (calculated by Langmuir isotherm model), much higher than for the corresponding non-loaded biochar (no adsorption of As, 4335 mg/kg for Cd). Adsorption of Cd and As onto BRB was controlled by multi mechanisms; Cd(II) appeared to coordinate to vacant sites of birnessite, while As formed surface complex with functional groups. Furthermore, BRB showed higher abilities for co-adsorption of As(III) and Cd or As(V) and Cd, which may be due to the formation of Cd-3(AsO4)(2) surface precipitate as well as synergistic reaction between anions and cations. After conditioning to soil, BRB showed potential for Cd and As remediation under both flooded and unflooded conditions. These results suggested that BRB can be used as an effective sorbent for simultaneous immobilization of heavy metals, especially As and Cd, in environmental and agricultural systems.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42791]
专题	生态环境研究中心_城市与区域生态国家重点实验室
作者单位	1.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 3.Chinese Acad Sci, Key Lab Urban Environm & Hlth, Inst Urban Environm, Xiamen 361021, Peoples R China
推荐引用方式 GB/T 7714	Wang, Hong-Yan,Chen, Peng,Zhu, Yong-Guan,et al. Simultaneous adsorption and immobilization of As and Cd by birnessite-loaded biochar in water and soil[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2019,26(9):8575-8584.
APA	Wang, Hong-Yan,Chen, Peng,Zhu, Yong-Guan,Cen, Kuang,&Sun, Guo-Xin.(2019).Simultaneous adsorption and immobilization of As and Cd by birnessite-loaded biochar in water and soil.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,26(9),8575-8584.
MLA	Wang, Hong-Yan,et al."Simultaneous adsorption and immobilization of As and Cd by birnessite-loaded biochar in water and soil".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 26.9(2019):8575-8584.