蔬菜中典型疏水性有机污染物的吸收：被动采样器提供的证据

IF 3.6 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Environmental Toxicology and Chemistry Pub Date : 2024-08-22 DOI:10.1002/etc.5978

Rong Wang, Yu Wang, Ying Dong, Chen-Chou Wu, Juying Li, Lingmin Tian, Lian-Jun Bao, Eddy Y. Zeng

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引用次数: 0

摘要

由于缺乏有关土壤孔隙水中可自由获取的 HOCs 部分的数据，因此量化植物根系对疏水性有机污染物（HOCs）的吸收仍然具有挑战性。因此，我们假设被动采样器可以作为一种有用的工具，用于评估土壤中植物根系吸收 HOCs 的潜力和途径。为了验证这一假设，我们在受污染的土壤系统中使用被动采样器探索了胡萝卜和莴苣对多溴联苯醚（PBDEs）和有机磷酸酯（OPEs）的吸收情况。结果表明，胡萝卜和莴苣中富集的多溴联苯醚含量与被动采样器中富集的多溴联苯醚含量呈正相关（r2 = 0.46-0.88）。由于 OPE 可能会在生菜中降解，因此生菜和被动采样器中的 OPE 浓度没有相关性。胡萝卜中多溴联苯醚和 OPE 的根与地下水比率分别为 6.2 至 11 和 0.05 至 0.88 升/克，生菜中为 8.8 至 130 和小于报告限值至 1.2 升/克。胡萝卜的比率与对数 KOW 值呈负相关，但随着对数 KOW 值在 1.97 至 6.80 之间的增加而增加，而生菜的比率则随着对数 KOW 值大于 6.80 而降低。这一结果表明，被动迁移和分配分别是多溴联苯醚和 OPE 在胡萝卜和莴苣中的累积途径。总之，被动采样器在评估植物中持久性 HOCs 的可用组分方面表现出色，可作为探索植物根系吸收 HOCs 途径的可行工具。环境毒物化学 2024;00:1-12。© 2024 SETAC.

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Uptake of Typical Hydrophobic Organic Contaminants in Vegetables: Evidence From Passive Samplers

Quantifying the root uptake of hydrophobic organic contaminants (HOCs) by plants remains challenging due to the lack of data on the freely available fractions of HOCs in soil porewater. We therefore hypothesized that a passive sampler could act as a useful tool to evaluate the root uptake potential and pathways of HOCs by plants in soil. We tested this hypothesis by exploring the uptake of polybrominated diphenyl ethers (PBDEs) and organophosphate esters (OPEs) by carrot and lettuce with the codeployment of passive samplers in a contaminated soil system. The results showed that the amounts of PBDEs enriched in carrot and lettuce were positively correlated with those in a passive sampler (r² = 0.46–0.88). No concentration correlation was observed for OPEs between lettuce and passive samplers, due to possible degradation of OPEs in lettuce. The root-to-porewater ratios of PBDEs and OPEs, respectively, were 6.2 to 11 and 0.05 to 0.88 L g⁻¹ for carrot, and 8.8 to 130 and less than reporting limits to 1.2 L g⁻¹ for lettuce. The ratios were negatively correlated with log K_OW values for carrot, but increased with increasing log K_OW values over a range of 1.97 to 6.80, and then decreased with log K_OW values greater than 6.80 for lettuce. This finding indicated that passive transport and partition were the accumulation pathways of PBDEs and OPEs in carrot and lettuce, respectively. Overall, passive samplers performed adequately in assessing the available fractions of persistent HOCs in plants, and can serve as a viable tool for exploring the pathways for plant root uptake of HOCs. Environ Toxicol Chem 2024;43:2338–2349. © 2024 SETAC

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来源期刊

Environmental Toxicology and Chemistry 环境科学-毒理学

CiteScore

7.40

自引率

9.80%

发文量

265

审稿时长

3.4 months

期刊介绍： The Society of Environmental Toxicology and Chemistry (SETAC) publishes two journals: Environmental Toxicology and Chemistry (ET&C) and Integrated Environmental Assessment and Management (IEAM). Environmental Toxicology and Chemistry is dedicated to furthering scientific knowledge and disseminating information on environmental toxicology and chemistry, including the application of these sciences to risk assessment.[...] Environmental Toxicology and Chemistry is interdisciplinary in scope and integrates the fields of environmental toxicology; environmental, analytical, and molecular chemistry; ecology; physiology; biochemistry; microbiology; genetics; genomics; environmental engineering; chemical, environmental, and biological modeling; epidemiology; and earth sciences. ET&C seeks to publish papers describing original experimental or theoretical work that significantly advances understanding in the area of environmental toxicology, environmental chemistry and hazard/risk assessment. Emphasis is given to papers that enhance capabilities for the prediction, measurement, and assessment of the fate and effects of chemicals in the environment, rather than simply providing additional data. The scientific impact of papers is judged in terms of the breadth and depth of the findings and the expected influence on existing or future scientific practice. Methodological papers must make clear not only how the work differs from existing practice, but the significance of these differences to the field. Site-based research or monitoring must have regional or global implications beyond the particular site, such as evaluating processes, mechanisms, or theory under a natural environmental setting.