Zhao Shuyan, Zhu Lingyan
Key Laboratory of Industrial Ecology and Environmental Engineering, School of Food and Environment, Dalian University of Technology, Panjin, Liaoning, 124221, PR China.
Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, PR China.
Environ Pollut. 2017 Jan;220(Pt A):124-131. doi: 10.1016/j.envpol.2016.09.030.
The behavior of 10:2 fluorotelomer alcohol (10:2 FTOH) in the systems of soil-earthworm (Eisenia fetida), soil-wheat (Triticum aestivum L.) and soil-earthworm-wheat, including degradation in soil, uptake and metabolism in wheat and earthworms were investigated. Several perfluorocarboxylic acids (PFCAs) as degradation products of 10:2 FTOH were identified in the soil, plant and earthworms. 10:2 FTOH could be biodegraded to perfluorooctanoate (PFOA), perfluorononanate (PFNA) and perfluorodecanoate (PFDA) in soil in the absence or presence of wheat/earthworms, and PFDA was the predominant metabolite. Accumulation of initial 10:2 FTOH and its metabolites were observed in the wheat and earthworms, suggesting that 10:2 FTOH could be bioaccumulated in wheat and earthworms and biotransformed to the highly stable PFCAs. Perfluoropentanoic acid (PFPeA), perfluorohexanoic (PFHxA) and PFDA were detected in wheat root, while PFDA and perfluoroundecanoic acid (PFUnDA) were detected in shoot. PFNA and PFDA were determined in earthworms and the concentration of PFDA was much higher. The presence of earthworms and/or plant stimulated the microbial degradation of 10:2 FTOH in soil. The results supplied important evidence that degradation of 10:2 FTOH was an important potential source of PFCAs in the environment and in biota.
研究了10:2氟调聚物醇（10:2 FTOH）在土壤-蚯蚓（赤子爱胜蚓）、土壤-小麦（普通小麦）以及土壤-蚯蚓-小麦体系中的行为，包括其在土壤中的降解、在小麦和蚯蚓体内的吸收与代谢。在土壤、植物和蚯蚓中鉴定出了几种作为10:2 FTOH降解产物的全氟羧酸（PFCA）。在有无小麦/蚯蚓存在的情况下，10:2 FTOH在土壤中均可生物降解为全氟辛酸（PFOA）、全氟壬酸（PFNA）和全氟癸酸（PFDA），且PFDA是主要代谢产物。在小麦和蚯蚓中观察到了初始10:2 FTOH及其代谢产物的积累，这表明10:2 FTOH可在小麦和蚯蚓体内生物累积并转化为高度稳定的PFCA。在小麦根中检测到了全氟戊酸（PFPeA）、全氟己酸（PFHxA）和PFDA，而在地上部分检测到了PFDA和全氟十一酸（PFUnDA）。在蚯蚓中测定到了PFNA和PFDA，且PFDA的浓度更高。蚯蚓和/或植物的存在刺激了土壤中10:2 FTOH的微生物降解。这些结果提供了重要证据，证明10:2 FTOH的降解是环境和生物群中PFCA的一个重要潜在来源。
