Research progress on adsorption technologies for PFAS removal from water
WANG Tu1,2, BAO Yi-xiang2, ZHONG Jin-kui1, LI Jing-feng2, CAO Zhi-guo2, WU Min2
1. School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; 2. State Key Laboratory of Water Resource Protection and Utilization in Coal Mining, National Institute of Clean and Low Carbon Energy, Beijing 102209, China
Abstract：In this paper, the adsorption properties, mechanisms, influencing factors, advantages and potential problems of different adsorbents (activated carbon, resin, mineral materials, molecularly imprinted polymers, bio-based materials, etc.) for PFAS removal were summarized. Adsorbents with similar pore size to PFAS molecules, and with opposite surface charge had higher adsorption capacity to PFAS. Lower pH and higher temperature are more favorable for PFAS adsorption, and coexisting organic matter will compete with PFAS on adsorption. The adsorption performance of the adsorbent to PFAS was positively correlated with its chain length, and the adsorption capacity of the adsorbent to PFAS containing sulfonic group was higher than that of PFAS with carboxylic group at the same chain length. The main adsorption mechanisms include electrostatic attraction, hydrophobic interaction, ion exchange, ligand exchange, etc. The reasonable regeneration and disposal of adsorbents was a common problem in practical engineering applications, such as poor regeneration effect of chemical regeneration and biological regeneration, high energy consumption of thermal regeneration, easy to cause secondary pollution by solvent regeneration or landfill treatment. By reviewing the research progress of adsorption removal materials and technologies for PFAS from water, the advantages and disadvantages of different technologies are systematically expounded, and the research direction of adsorption removal technology is prospected, which could provide reference for PFAS pollution control in water.
王菟, 包一翔, 钟金魁, 李井峰, 曹志国, 吴敏. 水中PFAS吸附去除技术研究进展[J]. 中国环境科学, 2023, 43(12): 6413-6434.
WANG Tu, BAO Yi-xiang, ZHONG Jin-kui, LI Jing-feng, CAO Zhi-guo, WU Min. Research progress on adsorption technologies for PFAS removal from water. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(12): 6413-6434.
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