Per- and polyfluoroalkyl substances (PFASs) in the soil–plant system: Sorption, root uptake, and translocation

Environment International

Guang-Guo Ying¹  Weisheng Lu²  Hao Sun²  Gan Zhang²  Yongtao Li²  Weiping Mei²  Mengke Song²  Longfei Jiang³  Chunling Luo⁴ 

[1] Corresponding authors at: College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China.;College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China;State Key Laboratory of Organic Geochemistry and Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;The Environmental Research Institute, South China Normal University, Guangzhou 510631, China;

关键词: PFASs;    Bioavailability;    Sorption;    Uptake;    Translocation;   

DOI  :  

来源: DOAJ

【 摘 要 】

Per- and polyfluoroalkyl substances (PFASs) are ubiquitous in the environment but pose potential risks to ecosystems and human health. The soil–plant system plays an important role in the bioaccumulation of PFASs. Because most PFASs in the natural environment are anionic and amphiphilic (both lipophilic and hydrophilic), their sorption and accumulation behaviors differ from those of neutral organic and common ionic compounds. In this review, we discuss processes affecting the availability of PFASs in soil after analyzing the potential mechanisms underlying the sorption and uptake of PFASs in the soil–plant system. We also summarize the current knowledge on root uptake and translocation of PFASs in plants. We found that the root concentration factor of PFASs for plants grown in soil was not significantly correlated with hydrophobicity, whereas the translocation factor was significantly and negatively correlated with PFAS hydrophobicity regardless of whether plants were grown hydroponically or in soil. Further research on the cationic, neutral, and zwitterionic forms of diverse PFASs is urgently needed to comprehensively understand the environmental fates of PFASs in the soil–plant system. Additional research directions are suggested, including the development of more accurate models and techniques to evaluate the bioavailability of PFASs, the effects of root exudates and rhizosphere microbiota on the bioavailability and plant uptake of PFASs, and the roles of different plant organelles, lipids, and proteins in the accumulation of PFASs by plants.

【 授权许可】

Unknown