Department of Environmental Toxicology, Texas Tech University, Lubbock, Texas, USA.
Cropping Systems Research Laboratory, US Department of Agriculture, Lubbock, Texas, USA.
Environ Toxicol Chem. 2019 Nov;38(11):2497-2502. doi: 10.1002/etc.4571. Epub 2019 Oct 3.
Although many studies have evaluated the fate of per- and polyfluoroalkyl acids (PFAAs) in aquatic environments, few have observed their fate in terrestrial environments. It has been proposed that ingestion could be a major PFAA exposure route for humans. We determined PFAA uptake in radish, carrot, and alfalfa under a maximum bioavailability scenario. Bioconcentration factors (BCFs) were determined in the edible tissue of radish (perfluorobutanesulfonate [PFBS] = 72; perfluorohexanesulfonate [PFHxS] = 13; perfluoroheptanoate [PFHpA] = 65; perfluorooctanoate [PFOA] = 18; perfluorooctanesulfonate [PFOS] = 2.9; and perfluorononanoate [PFNA] = 9.6), carrot (PFBS = 5.9; PFHxS = 1.1; PFHpA = 29; PFOA = 3.1; PFOS = 1; and PFNA = 1.4), and alfalfa (PFBS = 107; PFHxS = 12; PFHpA = 91; PFOA = 10; PFOS = 1.4; and PFNA = 1.7). Some of these PFAA BCFs are as much as 2 orders of magnitude higher than those measured previously in plants grown in biosolid-amended soils. Environ Toxicol Chem 2019;38:2497-2502. © 2019 SETAC.
尽管许多研究评估了全氟和多氟烷基物质 (PFAA) 在水生环境中的命运，但很少有研究观察到它们在陆地环境中的命运。有人提出，摄入可能是人类接触 PFAA 的主要途径。我们在最大生物利用度的情况下测定了萝卜、胡萝卜和紫花苜蓿中 PFAA 的摄取量。在萝卜的可食用组织中确定了生物浓缩因子 (BCF)（全氟丁烷磺酸 [PFBS] = 72；全氟己烷磺酸 [PFHxS] = 13；全氟庚酸 [PFHpA] = 65；全氟辛酸 [PFOA] = 18；全氟辛烷磺酸 [PFOS] = 2.9；全氟壬酸 [PFNA] = 9.6）、胡萝卜（PFBS = 5.9；PFHxS = 1.1；PFHpA = 29；PFOA = 3.1；PFOS = 1；PFNA = 1.4）和紫花苜蓿（PFBS = 107；PFHxS = 12；PFHpA = 91；PFOA = 10；PFOS = 1.4；PFNA = 1.7）。这些 PFAA BCF 中的一些比以前在生物固体改良土壤中种植的植物中测量到的高出 2 个数量级。环境毒理化学 2019；38:2497-2502。© 2019 SETAC。
