DOI: 10.1016/j.watres.2018.03.026
Scopus记录号: 2-s2.0-85046034774
论文题名: Effect of preconditioning on silver leaching and bromide removal properties of silver-impregnated activated carbon (SIAC)
作者: Rajaeian B. ; Allard S. ; Joll C. ; Heitz A.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 138 起始页码: 152
结束页码: 159
语种: 英语
英文关键词: Adsorption
; Bromide removal
; Point of zero charge pH (pHPZC)
; Silver impregnated activated carbon (SIAC)
; Silver leaching
Scopus关键词: Activated carbon
; Activated carbon treatment
; Adsorption
; Bromine compounds
; Chlorine compounds
; Groundwater
; Ionic strength
; Leaching
; Potable water
; Disinfection by-product
; Drinking water production
; Impregnated activated carbon
; Point of zero charge
; Silver chlorides
; Silver leaching
; Surface charge properties
; Synthetic waters
; Silver halides
; activated carbon
; bromide
; drinking water
; ground water
; silver
; silver chloride
; bromide
; carbon
; silver
; silver derivative
; activated carbon
; adsorption
; bromide
; byproduct
; disinfection
; leaching
; pollutant removal
; silver
; adsorption
; Article
; complex formation
; ionic strength
; leaching
; pH
; priority journal
; silver impregnation
; surface charge
; surface property
; chemistry
; disinfection
; halogenation
; procedures
; water management
; water pollutant
; Bromides
; Carbon
; Disinfection
; Halogenation
; Hydrogen-Ion Concentration
; Silver
; Silver Compounds
; Surface Properties
; Water Pollutants, Chemical
; Water Purification
英文摘要: Silver impregnated activated carbon (SIAC) has been found to be effective in mitigating the formation of brominated-disinfection by products during drinking water treatment. However, there are still uncertainties regarding its silver leaching properties, and strategies for the prevention of silver leaching have remained elusive. This study focused on the evaluation of one type of commercially available SIAC for its ability to remove bromide while minimising silver leaching from the material. Both synthetic and real water matrices were tested. Depending on solution pH, it was found that changing the surface charge properties of SIAC, as measured by the point of zero charge pH, can result in additional bromide removal while minimising the extent of silver leaching. To better understand the mechanism of silver leaching from the SIAC, eight preconditioning environments, i.e. variable pH and ionic strength were tested for a fixed amount of SIAC and two preconditioning environments were selected for a more detailed investigation. Experiments carried out in synthetic water showed that preconditioning at pH 10.4 did not deteriorate the capacity of SIAC to remove bromide, but significantly decreased the release of silver in the form of ionic silver (Ag+), silver bromide (AgBr) and silver chloride (AgCl) from 40% for the pristine to 3% for the treated SIAC. This was confirmed using a groundwater sample. These results suggest that preconditioned SIAC has the potential to be an effective method for bromide removal with minimised silver leaching in a long-term field application for drinking water production. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112794
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia; Curtin Water Quality Research Centre, Department of Chemistry, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
Recommended Citation:
Rajaeian B.,Allard S.,Joll C.,et al. Effect of preconditioning on silver leaching and bromide removal properties of silver-impregnated activated carbon (SIAC)[J]. Water Research,2018-01-01,138