The variation of DOM during long distance water transport by the China South to North Water Diversion Scheme and impact on drinking water treatment

IF 6.1 2区 环境科学与生态学 Q2 ENGINEERING, ENVIRONMENTAL
Hankun Yang, Yujuan Li, Hongyu Liu, Nigel J. D. Graham, Xue Wu, Jiawei Hou, Mengjie Liu, Wenyu Wang, Wenzheng Yu
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Abstract

In this study, samples were taken from three locations, upstream to downstream, along the central route project of the China South to North Water Diversion (SNWD) scheme in summer and winter. These were used to reveal the variations of dissolved organic matter (DOM) during the water transfer process, and the effects of these variations on drinking water treatment and disinfection by-products formation potential (DBPs-FP). The results showed that polysaccharides accumulate in summer and reduce in winter with flow distance, which has an important effect on the overall properties of DOM, as well as on the performance of coagulation, ultrafiltration, and the formation of DBPs. Humic substances, and their hydrophilic content, also increased in summer and decreased in winter with flow distance. In contrast, the concentration of small organic substances (MW ⩽ 1000 Da) increased in both summer and winter with flow distance, which affected both nanofiltration (NF) membrane fouling and DBPs-FP. The results provide a useful case study of spatial and temporal changes in raw water DOM during long distance water transfer and their impact on the treatment and quality of drinking water from the SNWD.

Abstract Image

南水北调长距离输水过程中 DOM 的变化及对饮用水处理的影响
本研究在夏季和冬季从中国南水北调(SNWD)计划中央线路工程沿线从上游到下游的三个地点采集了样本。这些样本用于揭示输水过程中溶解有机物(DOM)的变化,以及这些变化对饮用水处理和消毒副产物形成潜力(DBPs-FP)的影响。研究结果表明,多糖类物质会随着水流距离的增加而在夏季积累、在冬季减少,这对溶解有机物的整体特性以及混凝、超滤性能和 DBPs 的形成都有重要影响。随着水流距离的增加,腐殖质及其亲水性含量也在夏季增加,冬季减少。相比之下,小分子有机物质(截留分子量 ⩽ 1000 Da)的浓度在夏季和冬季都会随着流动距离的增加而增加,从而影响纳滤膜污垢和 DBPs-FP 的形成。这些结果为研究远距离输水过程中原水 DOM 的时空变化及其对南水北调中线工程饮用水处理和水质的影响提供了一个有用的案例。
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来源期刊
Frontiers of Environmental Science & Engineering
Frontiers of Environmental Science & Engineering ENGINEERING, ENVIRONMENTAL-ENVIRONMENTAL SCIENCES
CiteScore
10.90
自引率
12.50%
发文量
988
审稿时长
6.1 months
期刊介绍: Frontiers of Environmental Science & Engineering (FESE) is an international journal for researchers interested in a wide range of environmental disciplines. The journal''s aim is to advance and disseminate knowledge in all main branches of environmental science & engineering. The journal emphasizes papers in developing fields, as well as papers showing the interaction between environmental disciplines and other disciplines. FESE is a bi-monthly journal. Its peer-reviewed contents consist of a broad blend of reviews, research papers, policy analyses, short communications, and opinions. Nonscheduled “special issue” and "hot topic", including a review article followed by a couple of related research articles, are organized to publish novel contributions and breaking results on all aspects of environmental field.
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