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
ISSN0944-1344
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
DOI10.1007/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
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
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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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