Arsenic sorption by red mud-modified biochar produced from rice straw

doi:10.1007/s11356-017-9466-7

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	Arsenic sorption by red mud-modified biochar produced from rice straw
	Wu, C; Huang, L; Xue, SG; Huang, YY; Hartley, W; Cui, MQ; Wong, MH
	2017
发表期刊	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN	0944-1344
卷号	24 期号:22 页码:18168-18178
文章类型	期刊论文
摘要	Red mud-modified biochar (RM-BC) has been produced to be utilized as a novel adsorbent to remove As because it can effectively combine the beneficial features of red mud (rich metal oxide composition and porous structure) and biochar (large surface area and porous structure properties). SEM-EDS and XRD analyses demonstrated that red mud had loaded successfully on the surface of biochar. With the increasing of pH in solution, arsenate (As(V)) adsorption on RM-BC decreased while arsenite (As(III)) increased. Arsenate adsorption kinetics process on RM-BC fitted the pseudo-second-order model, while that of As(III) favored the Elovich model. All sorption isotherms produced superior fits with the Langmuir model. RM-BC exhibited improved As removal capabilities, with a maximum adsorption capacity (Q(max)) for As(V) of 5923 mu g g(-1), approximately ten times greater than that of the untreated BC (552.0 mu g g(-1)). Furthermore, it has been indicated that the adsorption of As(V) on RM-BC may be strongly associated with iron oxides (hematite and magnetite) and aluminum oxides (gibbsite) by X-ray absorption near-edge spectroscopy (XANES), which was possibly because of surface complexation and electrostatic interactions. RM-BC may be used as a valuable adsorbent for removing As in the environment due to the waste materials being relatively abundant.
关键词	Zero-valent Iron Bauxite Residue Aqueous-solutions Alkaline Characteristics Aggregate Stability Natural Hematite Magnetic Biochar As(Iii) Removal Paddy Soil Adsorption
DOI	10.1007/s11356-017-9466-7
关键词[WOS]	ZERO-VALENT IRON ; BAUXITE RESIDUE ; AQUEOUS-SOLUTIONS ; ALKALINE CHARACTERISTICS ; AGGREGATE STABILITY ; NATURAL HEMATITE ; MAGNETIC BIOCHAR ; AS(III) REMOVAL ; PADDY SOIL ; ADSORPTION
收录类别	SCI
语种	英语
WOS记录号	WOS:000407577800018
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.sinap.ac.cn/handle/331007/28558
专题	中科院上海应用物理研究所2011-2018年
推荐引用方式 GB/T 7714	Wu, C,Huang, L,Xue, SG,et al. Arsenic sorption by red mud-modified biochar produced from rice straw[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2017,24(22):18168-18178.
APA	Wu, C.,Huang, L.,Xue, SG.,Huang, YY.,Hartley, W.,...&Wong, MH.(2017).Arsenic sorption by red mud-modified biochar produced from rice straw.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,24(22),18168-18178.
MLA	Wu, C,et al."Arsenic sorption by red mud-modified biochar produced from rice straw".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 24.22(2017):18168-18178.

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