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2021 Vol.26, Issue 5 Preview Page
Study on Adsorption Characteristics of Perfluorinated Compounds(PFCs) with Structural Properties

과불화화합물 구조적 속성에 따른 흡착 특성 연구

HyoJung Choi1
,
Deok Hyun Kim1
,
JongHyun Yoon1
,
JongBeom Kwon1
,
Moonsu Kim1
,
Hyun-Koo Kim1
,
Sun-Kyoung Shin1
,
Sunhwa Park1*
최효정 1
,
김덕현 1
,
윤종현 1
,
권종범 1
,
김문수 1
,
김현구 1
,
신선경 1
,
박선화 1*
1Soil and Groundwater Research Division, National Institute of Environmental Research, Incheon 22689, Korea
1국립환경과학원 토양지하수연구과
*Corresponding Author
31 October 2021. pp. 20-28
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Abstract

Perfluorinated compounds(PFCs), an emerging environmental pollutant, are environmentally persistent and bioaccumulative organic compounds that possess a toxic impact on human health and ecosystems. PFCs are distributed widely in environment media including groundwater, surface water, soil and sediment. PFCs in contaminated solid can potentially leach into groundwater. Therefore, understanding PFCs partitioning between the aqueous phase and solid phase is important for the determination of their fate and transport in the environment. In this study, the sorption equilibrium batch and kinetic experiment of PFCs were carried out to estimated the sorption coefficient(K d ) and the fraction between aqueous-solid phase partition, respectively. Sorption branches of the PFDA(Perfluoro-n-decanoic acid), PFNA(Perfluoro-n-nonanoic acid), PFOA(Perfluoro-n-octanoic acid), PFOS(Perfluoro-1-octane sulfonic acid) and PFHxS(Perfluoro-1-hexane sulfonic acid) isotherms were nearly linear, and the estimated K d was as follow: PFDA(1.50) > PFOS(1.49) > PFNA(0.81) > PFHxS(0.45) > PFOA(0.39). The sorption kinetics of PFDA, PFNA, PFOA, PFOS and PFHxS onto soil were described by a biexponential adsorption model, suggesting that a fast transport into the surface layer of soil, followed by two-step diffusion transport into the internal water and/or organic matter of soil. Shorter times(<20hr) were required to achieve equilibrium and fraction for adsorption on solid(F1, F2) increased with perfluorinated carbon chain length and sulfonate compounds in this study. Overall, our results suggested that not only the perfluorocarbon chain length, but also the terminal functional groups are important contributors to electrostatic and hydrophobic interactions between PFCs and soils, and organic matter in soils significantly affects adsorption maximum capacity than kinetic rate.

Keywords
PFCs
Adsorption
Batch test
Kinetics
Partitioning coefficient
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Information
  • Publisher :The Korean Society of Soil and Groundwater Environment
  • Publisher(Ko) :한국지하수토양환경학회
  • Journal Title :Journal of Soil and Groundwater Environment
  • Journal Title(Ko) :지하수토양환경
  • Volume : 26
  • No :5
  • Pages :20-28
  • Received Date : 2021-07-23
  • Revised Date : 2021-08-03
  • Accepted Date : 2021-09-28
  • DOI :https://doi.org/10.7857/JSGE.2021.26.5.020
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