DOI: 10.1016/j.watres.2018.05.020
Scopus记录号: 2-s2.0-85048015528
论文题名: Physicochemical factors controlling the retention and transport of perfluorooctanoic acid (PFOA) in saturated sand and limestone porous media
作者: Lv X. ; Sun Y. ; Ji R. ; Gao B. ; Wu J. ; Lu Q. ; Jiang H.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 141 起始页码: 251
结束页码: 258
语种: 英语
英文关键词: Limestone
; Perfluorooctanoic acid (PFOA)
; Physicochemical factors
; Quartz sand
; Retention
; Transport
Scopus关键词: Environmental impact
; Ionic strength
; Lime
; Limestone
; Porous materials
; Perfluorooctanoic acid
; Physico-chemical factors
; Quartz sand
; Retention
; Transport
; Sand
; calcium ion
; carbon 14
; limestone
; perfluorooctanoic acid
; sodium ion
; calcium carbonate
; fluorocarbon
; octanoic acid derivative
; perfluorooctanoic acid
; silicon dioxide
; Article
; concentration (parameters)
; environmental impact
; isotope labeling
; physical chemistry
; pollution transport
; porosity
; priority journal
; sand
; surface area
; zeta potential
; chemistry
; kinetics
; osmolarity
; porosity
; Calcium Carbonate
; Caprylates
; Fluorocarbons
; Kinetics
; Osmolar Concentration
; Porosity
; Silicon Dioxide
英文摘要: Comprehensively understanding the fate and transport of perfluorooctanoic acid (PFOA) in subsurface environment is crucial to assess its environmental impacts. In this work, column experiments were conducted to investigate the effects of physicochemical factors on the retention and transport of 14C-labeled PFOA in saturated sand and limestone porous media. The retention of PFOA in limestone columns was higher than that in sand columns under the same solution chemistry conditions. This can be attributed to that the limestone had less negative zeta-potential and larger specific surface area than the sand. Changes in ionic strength (low to high) and cation type (Na+ to Ca2+) had little influences on the mobility of PFOA in sand porous media, but significantly enhanced the retention of PFOA in limestone porous media. Nearly no PFOA was retained in the sand columns, but relatively high levels of PFOA retention (28.7–48.4%) were achieved in the limestone columns. Higher input concentration resulted in lower PFOA retention in limestone porous media, reflecting the blocking effect of the sorption sites. The blocking effect was insignificant in sand porous media, probably because the experimental conditions were unfavorable for PFOA sorption on sand media. A two-site kinetic retention model effectively simulated both the breakthrough and retention behaviors of the PFOA in the sand and limestone porous media. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112674
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Hydrosciences Department, Nanjing University, Nanjing, 210023, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China; Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States; Shandong Zhengyuan Construction Engineering Co. Ltd, Jinan, 250100, China
Recommended Citation:
Lv X.,Sun Y.,Ji R.,et al. Physicochemical factors controlling the retention and transport of perfluorooctanoic acid (PFOA) in saturated sand and limestone porous media[J]. Water Research,2018-01-01,141