Porous biochar-nanoscale zero-valent iron composites: Synthesis, characterization and application for lead ion removal

doi:10.1016/j.scitotenv.2020.141037

	Porous biochar-nanoscale zero-valent iron composites: Synthesis, characterization and application for lead ion removal
	Li, Shuaishuai 1,3; Yang, Fan 4; Li, Jiangshan 2; Cheng, Kui 1,3
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2020-12-01
卷号	746 页码:9
关键词	nZVI Hydrophilic porous biochar Dispersibility Lead ions Removal mechanism
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2020.141037
英文摘要	Nano-zero-valent iron has been used in combination with a variety of support carriers to remove heavy metals in solution. However, pre-treatment of the carrier can reflect a better synergistic effect and thus achieve high heavy metal removal capabilities. In this study, the hydrophilic biochar obtained by an acid ammonium persulfate oxidation has an adsorption capacity of up to 135.4 mg g(-1) for Pb2+ (25 degrees C, pH = 6 with adsorbent amount of 10 mg and Pb2+ concentration of 50 mg L-1). Due to the strong Fe-C-O covalent bond, nZVI increases the binding force with the carbon matrix. Benefitting from the high specific surface area, porous structure and rich oxygen-containing functional groups, the resultant nZVI-HPB samples are favourable for Pb2+ diffusion and adsorption, exhibiting maximum adsorption capacity of 480.9 mg g(-1) (pH = 6, 25 degrees C with adsorbent amount of 10 mg and Pb2+ concentration of 200 mg L-1). The multiple interaction mechanisms in the Pb2+ removal process such as the reduction reaction, complexation and co-precipitation proceed simultaneously are concluded by the analyses of Fourier-Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) spectra. (C) 2020 Published by Elsevier B.V.
资助项目	Longjiang Scholars for young scientist, University Nursing Program for Young Scholar with Creative Talents in Heilongjiang Province[UNPYSCT2017018] ; Outstanding Youth Foundation of Heilongjiang Province of China[YQ2019E013] ; National Key Research and Development Program[2019YFC1804002] ; Natural Science Foundation of Heilongjiang Province of China[QC2018019]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000579371300032
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24964]
专题	中科院武汉岩土力学所
通讯作者	Yang, Fan; Cheng, Kui
作者单位	1.Northeast Agr Univ, Coll Engn, Harbin 150030, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Harbin Engn Univ, Coll Mat Sci & Chem Engn, Harbin 150001, Peoples R China 4.Northeast Agr Univ, Coll Water Conservancy & Civil Engn, Harbin 150030, Peoples R China
推荐引用方式 GB/T 7714	Li, Shuaishuai,Yang, Fan,Li, Jiangshan,et al. Porous biochar-nanoscale zero-valent iron composites: Synthesis, characterization and application for lead ion removal[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,746:9.
APA	Li, Shuaishuai,Yang, Fan,Li, Jiangshan,&Cheng, Kui.(2020).Porous biochar-nanoscale zero-valent iron composites: Synthesis, characterization and application for lead ion removal.SCIENCE OF THE TOTAL ENVIRONMENT,746,9.
MLA	Li, Shuaishuai,et al."Porous biochar-nanoscale zero-valent iron composites: Synthesis, characterization and application for lead ion removal".SCIENCE OF THE TOTAL ENVIRONMENT 746(2020):9.