Revealing the hidden identity and toxicity of priority chemical pollutants released during microplastic degradation and additive leaching in marine...

揭示海洋中微塑料降解和添加剂浸出过程中释放的主要化学污染物的隐藏身份和毒性...

• 批准号: 2772605
• 金额: --
• 依托单位: Plymouth University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2772605
• 关键词: Revealing; hidden; identity; toxicity; priority

...and coastal environments.Project Summary: Micro- and nanoscale plastics produced from the decomposition of marine plastic debris pose a severe threat to marine and coastal ecosystems. Microplastics (MPs) are known to undergo degradation in the marine environment through abrasion (physical), advanced oxidation processes (abiotic), and biological degradation (biotic), resulting in the leaching of additives not chemically bound to the polymer matrix. These transformations are difficult to reproduce under laboratory conditions; they dramatically increase the chemical complexity and analytical challenge of characterising MPs and MP-derived organics.This project addresses the important question of which emerging chemical contaminants from microplastic (MP) degradation are priority targets for future marine surveillance and compliance monitoring of coastal waters. Successful outcomes will include the identification of persistent chemical additives in MP-leachate, that do not degrade and pose a toxic threat to marine ecosystems. Technical Summary: MP degradation results in the leaching of additives not chemically bound to the polymer matrix, which dramatically increases the chemical complexity and analytical challenge of characterising MPs and MP-derived organics. Consequently, the degradation mechanisms and ecotoxicological effects of degraded MPs and MP-leachates remain poorly understood, with no legislative instruments/policies that provide guidelines for environmental assessments.The aim of this studentship is to develop a novel multimodal approach, employing a combination of state-of-the-art analytical technologies to conduct a comprehensive compositional analysis of environmental MPs and complex mixture of potentially toxic degradation products. By using a non-targeted approach, the data can also be retrospectively 'mined' for chemical groups of interest identified by stakeholders and other marine research teams. Recently developed standardised ecotoxicological tests will be used to assess the biological risk of the degraded MP and MP-leachate, alongside the use of the latest chemometric methods to identify a list of priority pollutants released during leaching and degradation of MPs in the marine environment.

...和沿海环境。项目摘要：由海洋塑料碎屑分解产生的微观和纳米级塑料对海洋和沿海生态系统构成了严重威胁。已知微型塑料（MPS）通过磨损（物理），晚期氧化过程（非生物）和生物学降解（生物降解）在海洋环境中发生降解，从而导致添加剂的浸出，而不是化学上与聚合物基质的化学结合。这些转变在实验室条件下很难繁殖。它们大大增加了表征MP和MP衍生有机物的化学复杂性和分析挑战。该项目解决了一个重要问题，即从微塑料（MP）降解中出现的化学污染物（MP）降解是对未来海洋冲水性和沿海水域均衡监测的优先目标。成功的结果将包括识别MP Leachate中持续的化学添加剂，这些化学添加剂不会降解并对海洋生态系统构成有毒威胁。技术摘要：MP降解导致添加剂的浸出与聚合物基质的化学结合，这显着增加了表征MPS和MP衍生有机物的化学复杂性和分析挑战。因此，降解机制和降解的MPS和MP渗透物的降解机制和生态毒理学影响仍然很熟悉，没有立法工具/政策可以为环境评估提供准则。 产品。通过使用非靶向方法，对于利益相关者和其他海洋研究团队确定的化学群体群体，数据也可以回顾性地“开采”。最近开发的标准化生态毒理学测试将用于评估MP和MP氯液降解的生物学风险，以及使用最新的化学计量方法来确定在海洋环境中MPS浸出和降解期间释放出的优先污染物列表。