Water temperature governs organophosphate ester dynamics in the aquatic food chain of Poyang Lake

IF 14 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Environmental Science and Ecotechnology Pub Date : 2024-02-19 DOI:10.1016/j.ese.2024.100401
Zhenfei Yan , Chenglian Feng , Yiping Xu , Jindong Wang , Nannan Huang , Xiaowei Jin , Fengchang Wu , Yingchen Bai
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Abstract

Organophosphate esters (OPEs) are increasingly recognized as pervasive environmental contaminants, primarily from their extensive application in flame retardants and plasticizers. Despite their widespread presence, the intricacies of OPE bioaccumulation within aquatic ecosystems remain poorly understood, particularly the environmental determinants influencing their distribution and the bioaccumulation dynamics across aquatic food chains. Here we show that water temperature plays a crucial role in modulating the dispersion of OPE in the aquatic environment of Poyang Lake. We quantified OPE concentrations across various matrices, uncovering levels ranging from 0.198 to 912.622 ng L−1 in water, 0.013–493.36 ng per g dry weight (dw) in sediment, 0.026–41.92 ng per g wet weight (ww) in plankton, 0.13–2100.72 ng per g dw in benthic invertebrates, and 0.31–3956.49 ng per g dw in wild fish, highlighting a pronounced bioaccumulation gradient. Notably, the intestines emerged as the principal site for OPE absorption, displaying the highest concentrations among the seven tissues examined. Among the various OPEs, tris(chloroethyl) phosphate was distinguished by its significant bioaccumulation potential within the aquatic food web, suggesting a need for heightened scrutiny. The propensity for OPE accumulation was markedly higher in benthic invertebrates than wild fish, indicating a differential vulnerability within aquatic biota. This study lays a foundational basis for the risk assessment of OPEs as emerging contaminants and underscores the imperative to prioritize the examination of bioaccumulation effects, particularly in benthic invertebrates, to inform future environmental safeguarding strategies.

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水温影响鄱阳湖水生食物链中有机磷酸酯的动态变化
人们日益认识到有机磷酸酯(OPE)是一种普遍存在的环境污染物,这主要是因为它们被广泛应用于阻燃剂和增塑剂。尽管它们广泛存在,但人们对有机磷酸酯在水生生态系统中生物累积的复杂性仍然知之甚少,尤其是影响其分布的环境决定因素以及在水生食物链中的生物累积动态。在这里,我们发现水温对 OPE 在鄱阳湖水生环境中的扩散起着至关重要的作用。我们对各种基质中的 OPE 浓度进行了量化,发现水中的 OPE 含量范围为 0.198 至 912.622 纳克/升-1,沉积物中的 OPE 含量范围为 0.013 至 493.36 纳克/克干重(dw),0.026 至 41.在浮游生物中为每克湿重 0.92 纳克,在底栖无脊椎动物中为每克干重 0.13-2100.72 纳克,在野生鱼类中为每克干重 0.31-3956.49 纳克。值得注意的是,肠道是吸收 OPE 的主要部位,在所研究的七种组织中浓度最高。在各种 OPE 中,三(氯乙基)磷酸酯因其在水生食物网中具有显著的生物累积潜力而与众不同,这表明有必要加强审查。底栖无脊椎动物的 OPE 累积倾向明显高于野生鱼类,这表明水生生物群的脆弱性存在差异。这项研究为对作为新兴污染物的 OPE 进行风险评估奠定了基础,并强调必须优先审查生物累积效应,特别是底栖无脊椎动物的生物累积效应,以便为未来的环境保障战略提供信息。
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来源期刊
CiteScore
20.40
自引率
6.30%
发文量
11
审稿时长
18 days
期刊介绍: Environmental Science & Ecotechnology (ESE) is an international, open-access journal publishing original research in environmental science, engineering, ecotechnology, and related fields. Authors publishing in ESE can immediately, permanently, and freely share their work. They have license options and retain copyright. Published by Elsevier, ESE is co-organized by the Chinese Society for Environmental Sciences, Harbin Institute of Technology, and the Chinese Research Academy of Environmental Sciences, under the supervision of the China Association for Science and Technology.
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