Understanding climate change-related increases in dissolved Mn, Fe, OM in drinking water systems: identifying future risks and facilitating fit-for-pu

了解饮用水系统中与气候变化相关的溶解 Mn、Fe、OM 增加：识别未来风险并促进适合 pu

基本信息

批准号：
2764595
负责人：
金额：
--
依托单位：
University of Edinburgh
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2022
资助国家：
英国
起止时间：
2022 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2764595
关键词：
Understanding climate change related increases

项目摘要

Many drinking water sources in Scotland and worldwide are experiencing seasonal fluctuations in dissolved Mn, Fe, OM concentrations. Over prolonged periods during summer and autumn, dissolved Mn concentrations are now approaching the WHO guideline value of 400 g L-1, above which there may be potential negative human health impacts. Dissolved Fe concentrations are typically higher and, although there is no similar health-based limit for Fe in drinking water, concentrations of >200 g L-1 can impair taste, cause staining of laundry and result in coatings/precipitates within drinking water distribution systems. Evidence suggests that the increasing dissolved concentrations are linked to climate change, specifically the increased frequency of extended dry periods interspersed by intensified storm events. Indeed, in 2021, many UK drinking water reservoir levels were at their lowest for ~160 years. There is now an urgent need for water providers to invest in fit-for-purpose water management systems; e.g. source water aeration, oxygenation and artificial destratification, specific raw water treatment processes, e.g. ozonation, chemical contactors, and/or flushing of distribution systems. Such mitigation measures are expensive and recent studies indicate that they are inefficient in treating organic-rich waters and in maintaining Mn/Fe concentrations below the levels which impact on the water distribution systems.

苏格兰和世界各地的许多饮用水源中溶解的锰、铁、有机质浓度正在经历季节性波动。在夏季和秋季的较长时期内，溶解锰浓度现已接近世界卫生组织指导值 400 g L-1，高于该值可能会对人类健康产生潜在的负面影响。溶解的铁浓度通常较高，尽管饮用水中的铁没有类似的健康限值，但浓度 >200 g L-1 会损害味道、导致衣物染色并导致饮用水分配系统内形成涂层/沉淀物。有证据表明，溶解浓度的增加与气候变化有关，特别是干旱期延长且风暴事件加剧的频率增加。事实上，到 2021 年，英国许多饮用水水库水位将降至 160 年来的最低水平。现在，水供应商迫切需要投资适合用途的水管理系统；例如源水曝气、充氧和人工去层化，特定的原水处理工艺，例如臭氧化、化学接触器和/或分配系统的冲洗。此类缓解措施成本高昂，而且最近的研究表明，它们在处理富含有机物的水体以及将锰/铁浓度维持在影响配水系统的水平以下方面效率低下。