Metals in the drinking water distribution system (DWDS) play an important role on the fate of disinfection by-products (DBPs). They can increase the formation of DBPs through several mechanisms, such as enhancing the proportion of reactive halogen species (RHS), catalysing the reaction between natural organic matter (NOM) and RHS through complexation, or by increasing the conversion of NOM into DBP precursors. This review comprehensively summarizes these complex processes, focusing on the most important metals (copper, iron, manganese) in DWDS and their impact on various DBPs. It organizes the dispersed ‘metals-DBPs’ experimental results into an easily accessible content structure and presents their underlying common or unique mechanisms. Furthermore, the practically valuable application directions of these research findings were analysed, including the toxicity changes of DBPs in DWDS under the influence of metals and the potential enhancement of generalization in DBP model research by the introduction of metals. Overall, this review revealed that the metal environment within DWDS is a crucial factor influencing DBP levels in tap water.

中文翻译：

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金属对饮用水管道中消毒副产物的复杂影响：系统评价


饮用水分配系统 (DWDS) 中的金属对消毒副产物 (DBP) 的去向起着重要作用。它们可以通过多种机制增加 DBP 的形成，例如提高活性卤素 (RHS) 的比例、通过络合催化天然有机物 (NOM) 和 RHS 之间的反应，或增加 NOM 向 DBP 前体的转化。本综述全面总结了这些复杂的过程，重点关注 DWDS 中最重要的金属（铜、铁、锰）及其对各种 DBP 的影响。它将分散的“金属-DBP”实验结果组织成易于访问的内容结构，并呈现其潜在的共同或独特机制。此外，还分析了这些研究成果的实际应用方向，包括金属影响下DWDS中DBPs的毒性变化以及金属的引入可能增强DBP模型研究的泛化能力。总体而言，本次审查表明 DWDS 内的金属环境是影响自来水中 DBP 水平的关键因素。