Despite growing concerns regarding the long-range transport (LRT) and ecological risks of organophosphate esters (OPEs), information on the environmental behaviors of OPEs in polar terrestrial ecosystems remains inadequate. In the present study, 10 OPEs were analyzed in soil and vegetation samples collected from Fildes Peninsula, Antarctica. The OPE concentrations in Antarctic soils, mosses, and lichens ranged from 0.87 to 15.7 ng/g dry weight (dw), 9.8 to 113 ng/g dw, and 3.6 to 75.2 ng/g dw, respectively. Non-chlorinated OPEs predominated in terrestrial matrices, accounting for approximately 76 % of the OPE composition. Source identification indicated that OPE contamination in Antarctica likely resulted from local anthropogenic sources and LRT. Moreover, the bioaccumulation behavior of OPEs from soil to vegetation was assessed using bioconcentration factors (BCFs), revealing a significant non-linear trend of initial increase and subsequent decrease in BCFs relative to the lipophilicities of the octanol-air partition coefficient (log ) and octanol-water partition coefficient (log ). While low levels of OPEs in Antarctic terrestrial environments were reported in this study, their sustained inputs and potential ecological risks in polar regions warrant further attention.

中文翻译：

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南极洲菲尔德斯半岛陆地环境中的有机磷酸酯：发生情况、潜在来源和生物累积


尽管人们越来越关注有机磷酸酯（OPE）的远距离运输（LRT）和生态风险，但有关极地陆地生态系统中有机磷酸酯（OPE）环境行为的信息仍然不足。在本研究中，对从南极洲菲尔德斯半岛采集的土壤和植被样本中的 10 种 OPE 进行了分析。南极土壤、苔藓和地衣中的 OPE 浓度范围分别为 0.87 至 15.7 ng/g 干重 (dw)、9.8 至 113 ng/g dw 和 3.6 至 75.2 ng/g dw。非氯化 OPE 在陆地基质中占主导地位，约占 OPE 成分的 76%。来源鉴定表明，南极洲的 OPE 污染可能是由当地人为来源和轻轨运输造成的。此外，使用生物浓缩因子 (BCF) 评估了 OPE 从土​​壤到植被的生物富集行为，揭示了 BCF 相对于辛醇-空气分配系数 (log ) 和亲脂性的初始增加和随后减少的显着非线性趋势。辛醇-水分配系数 (log )。虽然本研究报告了南极陆地环境中 OPE 水平较低，但其持续输入和极地地区潜在的生态风险值得进一步关注。