Assessing the Influence of Organic Carbon, Aging Time and Temperature on Bioaccessibility of Bifenthrin

IF 3.7 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Archives of Environmental Contamination and Toxicology Pub Date : 2023-10-28 DOI:10.1007/s00244-023-01039-5

Mia Arkles, Federico Sinche, Michael J. Lydy

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Abstract

Tenax extraction, a measure of chemical desorption rates from sediments, was used to evaluate the bioaccessibility of bifenthrin in two different sediments exposed to three temperatures aged over a 56-d holding period. A 24-h single-point Tenax extraction was used and parent ¹⁴C-bifenthrin and polar metabolites were quantified in the sediment and Tenax. Bioaccessibility of bifenthrin was inversely related to the organic carbon (OC) content in the sediment, holding time, and temperature. Sequestration of the bifenthrin into slowly desorbing fractions within the sediment appears to have decreased degradation of the parent compound into metabolites and decreased the amount of parent compound bioaccessible for uptake by the Tenax. These results suggest that the environmental risk of bifenthrin to aquatic species is greatest immediately after the pesticide enters a waterbody after runoff, for low-OC content sediments, and in areas or seasons where water temperatures are colder.

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评估有机碳、老化时间和温度对联苯菊酯生物可及性的影响。

Tenax提取是一种测量沉积物化学解吸率的方法，用于评估联苯菊酯在两种不同沉积物中的生物可及性，这两种沉积物暴露在三种温度下，陈化时间超过56d。使用24小时单点Tenax提取，并对沉积物和Tenax中的母体14C-联苯菊酯和极性代谢物进行定量。联苯菊酯的生物可及性与沉积物中有机碳含量、保温时间和温度呈负相关。在沉积物中，将联苯菊酯封闭到缓慢解吸的组分中，似乎减少了母体化合物向代谢物的降解，并减少了Tenax可生物吸收的母体化合物的量。这些结果表明，对于低有机碳含量的沉积物，以及在水温较低的地区或季节，农药在径流后进入水体后，联苯菊酯对水生物种的环境风险最大。

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来源期刊

Archives of Environmental Contamination and Toxicology 环境科学-毒理学

CiteScore

7.00

自引率

2.50%

发文量

审稿时长

8-16 weeks

期刊介绍： Archives of Environmental Contamination and Toxicology provides a place for the publication of timely, detailed, and definitive scientific studies pertaining to the source, transport, fate and / or effects of contaminants in the environment. The journal will consider submissions dealing with new analytical and toxicological techniques that advance our understanding of the source, transport, fate and / or effects of contaminants in the environment. AECT will now consider mini-reviews (where length including references is less than 5,000 words), which highlight case studies, a geographic topic of interest, or a timely subject of debate. AECT will also consider Special Issues on subjects of broad interest. The journal strongly encourages authors to ensure that their submission places a strong emphasis on ecosystem processes; submissions limited to technical aspects of such areas as toxicity testing for single chemicals, wastewater effluent characterization, human occupation exposure, or agricultural phytotoxicity are unlikely to be considered.