DOI: 10.1016/j.watres.2018.11.005
Scopus记录号: 2-s2.0-85056240871
论文题名: Bromate reduction and reaction-enhanced perchlorate adsorption by FeCl3-impregnated granular activated carbon
作者: Xu J. ; Gao N. ; Zhao D. ; An N. ; Li L. ; Xiao J.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 149
结束页码: 158
语种: 英语
英文关键词: Adsorption
; Bromate reduction
; Disinfection by-product
; Perchlorate
; Reaction enhanced adsorption
; Water treatment
Scopus关键词: Activated carbon
; Activated carbon treatment
; Adsorption
; Bromine compounds
; Granular materials
; Inorganic compounds
; Ion exchange
; Redox reactions
; Water pollution
; Water treatment
; Adsorption capacities
; Bromate reduction
; Disinfection by-product
; Enhanced adsorptions
; Granular activated carbons
; Modified activated carbons
; Perchlorate
; Surface complexation
; Iron compounds
; activated carbon
; bromate
; carbon
; deferiprone
; ferric chloride
; ferric ion
; iron
; perchlorate
; activated carbon
; adsorption
; byproduct
; catalyst
; chemical compound
; chemical reaction
; complexation
; disinfection
; ion exchange
; perchlorate
; pollutant removal
; reduction
; water pollution
; water treatment
; acidity
; adsorption
; Article
; catalyst
; chemical interaction
; complex formation
; oxidation reduction reaction
; priority journal
; reaction analysis
; reduction (chemistry)
; solute
; surface property
; water contamination
英文摘要: This work studied simultaneous bromate (BrO3 −) reduction and adsorption of perchlorate (ClO4 −) by FeCl3-impregnated granular activated carbon (Fe-GAC) and the mutual co-solute effects. We report that BrO3 − reduction by Fe-GAC was coupled with enhanced adsorption of ClO4 − by the material. The Langmuir maximum adsorption capacity for ClO4 − by Fe-GAC was increased from 0.179 mmol g−1 (without BrO3 −) to 0.256 mmol g−1 in the presence of 0.2 mmol L−1 of BrO3 − (a 43% increase) at pH 6.0. While the activated carbon alone was able simultaneously remove both BrO3 − and ClO4 −, Fe-GAC offered much greater removal efficacy and synergistic effect, likely because the immobilized Fe3+ acted as a catalyst and provided a local acidic environment, both being in favor of accelerated BrO3 − reduction. Mechanistic analyses revealed that BrO3 − removal was through a two-step process: ion exchange with OH− and Cl− on Fe-GAC, and then Fe-catalyzed reduction of BrO3 − to Br− by carbon. The carbon-BrO3 - redox reaction generated more Fe-O and C-O groups on the material surface, which can bind with ClO4 − by surface complexation and electrostatic interactions. To our knowledge, this is the first report that metal modified activated carbon may facilitate synergistic removal of both BrO3 − and ClO4 −, which are common co-solutes in contaminated waters. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122166
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Pollution Control and Resource Rescue, Tongji University, Shanghai, 200092, China; Beijing University of Civil Engineering and Architecture, Beijing, 100044, China; Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL 36849, United States
Recommended Citation:
Xu J.,Gao N.,Zhao D.,et al. Bromate reduction and reaction-enhanced perchlorate adsorption by FeCl3-impregnated granular activated carbon[J]. Water Research,2019-01-01