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Sedimentary filters for emerging contaminants in estuarine and coastal systems

针对河口和沿海系统中新兴污染物的沉积物过滤器

基本信息

批准号：
2569419
负责人：
金额：
--
依托单位：
University of Southampton
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2021
资助国家：
英国
起止时间：
2021 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2569419
关键词：
Sedimentary filters emerging contaminants estuarine

项目摘要

A range of increasingly utilised organic chemicals are now found in environmental waters due to their incomplete removal by water treatment processes, or via urban run-off. These include estrogens, personal care products, pharmaceuticals, pesticides, and persistent, so-called "forever chemicals" such as perfluoro-alkylated substances. A number of these emerging organic contaminants are known to have ecosystem and possible human health impacts at very low concentrations, in the parts per billion to parts per trillion range. Although a number of studies have examined the removal, biological uptake or degradation of these contaminants in wastewater or freshwater systems, their interaction mechanisms in and with estuarine systems such as salt marshes (which act as natural filters for many river-supplied contaminants before they enter the sea) are currently unclear. This project will examine the cycling, retention and breakdown of a range of emerging contaminants in estuarine marsh and mudflat systems in two contrasting estuaries - the Solent system on the southern UK coast, and the Pearl River Delta system (China). Work will focus in particular on contaminant degradation or accumulation mechanisms, contaminant interaction with sedimentary organic carbon, and the potential environmental risk that emerging contaminants pose to estuarine and coastal systems.

由于水处理过程或城市径流的不完全去除，现在在环境水中发现了一系列越来越多的有机化学物质。这些物质包括雌激素、个人护理产品、药品、杀虫剂和持久性、所谓的“永久化学品”，如全氟烷基化物质。已知这些新出现的有机污染物中有许多浓度非常低，在十亿分之一到万亿分之一的范围内，对生态系统和人类健康可能产生影响。尽管许多研究已经检查了废水或淡水系统中这些污染物的去除、生物吸收或降解，但它们在河口系统（如盐沼）中及其与河口系统的相互作用机制（盐沼在许多河流供应的污染物进入海洋之前充当天然过滤器）目前尚不清楚。本项目将研究两个截然不同的河口——英国南部海岸的索伦特系统和中国珠江三角洲系统——河口沼泽和泥滩系统中一系列新出现的污染物的循环、保留和分解。工作将特别侧重于污染物降解或积累机制，污染物与沉积有机碳的相互作用，以及新出现的污染物对河口和海岸系统构成的潜在环境风险。