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Effects of anionic hydrocarbon surfactant on the transport of perfluorooctanoic acid (PFOA) in natural soils.
Zhang, Qi; Wu, Xiaoli; Lyu, Xueyan; Gao, Bin; Wu, Jichun; Sun, Yuanyuan.
Afiliação
  • Zhang Q; 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.
  • Wu X; 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.
  • Lyu X; School of Hydrology and Water Resources, Nanjing University of Information Science and Technology, Nanjing, 210044, China. xylyu@nuist.edu.cn.
  • Gao B; Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL, 32611, USA.
  • Wu J; 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.
  • Sun Y; 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. sunyy@nju.edu.cn.
Environ Sci Pollut Res Int ; 29(17): 24672-24681, 2022 Apr.
Article em En | MEDLINE | ID: mdl-34826077
The widespread usage of per- and polyfluoroalkyl substances (PFASs) has led to their ubiquitous co-existence with hydrocarbon surfactants in the subsurface environment. In this study, column experiments were conducted to investigate the effect of an anionic hydrocarbon surfactant (sodium dodecylbenzene sulfonate, SDBS, 1 and 10 mg/L) on the transport of perfluorooctanoic acid (PFOA) in two saturated natural soils under different cation type (Na+ and Ca2+) conditions. Results showed that SDBS (10 mg/L) significantly enhanced the transport of PFOA in two soils. This was likely because SDBS had a stronger adsorption affinity to the soils than PFOA, and can outcompete PFOA for the finite adsorption sites on the soil surface. The effect of SDBS on PFOA transport varied greatly in the two soils. More negatively charged soil surface and greater soil particle size likely contributed to the more noticeable transport-enhancement of PFOA resulting from the presence of SDBS. Also, the enhancement effect of SDBS (10 mg/L) with Ca2+ on PFOA transport was more significantly than that with Na+. This was possibly due to the blocking effect of SDBS to the more positively charged soil surface induced by Ca2+. Findings of this study point out the importance of anionic hydrocarbon surfactants on PFOA transport when assessing its environmental risks and implementing remediation efforts.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes do Solo / Fluorocarbonos Idioma: En Ano de publicação: 2022 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes do Solo / Fluorocarbonos Idioma: En Ano de publicação: 2022 Tipo de documento: Article