Behaviour of metals in an urban river and the pollution of estuarine environment.
Behaviour of metals in an urban river and the pollution of estuarine environment.
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DOI：
10.1016/j.watres.2019.114911
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发表时间：
2019-11
期刊：
影响因子：
12.8
通讯作者：
Buddhi Wijesiri;An Liu;Beibei He;Bo Yang;Xu Zhao;G. Ayoko;A. Goonetilleke
中科院分区：
文献类型：
--
作者：
Buddhi Wijesiri;An Liu;Beibei He;Bo Yang;Xu Zhao;G. Ayoko;A. Goonetilleke
城市排放的高污染物负荷对城市水道构成风险，进而对河口环境构成风险，使改善城市宜居性成为挑战。过去对河流中污染物行为的研究主要是研究污染物沿沿着的迁移，主要集中在水和沉积物的运动。然而，目前的方法在污染物输运模拟提供有限的见解如何污染物之间的水和沉积物相转移影响他们的运输从上游到河口环境。本研究首次确定了中国一个人口密集城市的城市河流沿着金属负荷的典型模式。结果，然后被用来概念化水和沉积物相之间的金属转移。据指出，水和沉积物的物理化学特性在两个阶段之间的金属转移中发挥关键作用，不同金属的主要转移途径（沉积物到水/水到沉积物）不同，与其来源（地壳、人为或海洋）无关。从金属行为的概念化中产生了几种情景。这些反过来又被用来开发基于现场数据的河流中金属运输的真实场景。金属行为的概念化证实，每种金属可能有一个主要的迁移阶段（沉积物/水），这是由该金属在水和沉积物之间的主要转移路径的影响。
The high pollutant loads discharged from cities pose risks to urban waterways, and in turn the estuarine environments, making it challenging to improve urban liveability. Past studies on the behaviour of pollutants in rivers have largely investigated their transport along the waterway, primarily focusing on the movement of water and sediment. However, the current approaches in pollutant transport modelling provide limited insights into how pollutant transfer between water and sediment phases influences their transport from the upstream towards the estuarine environment. This research study firstly identified typical patterns of metal loads along an urban river in a highly populated city in China. The outcomes were then used to conceptualise metal transfer between water and sediment phases. It was noted that physico-chemical characteristics of water and sediments play a key role in metal transfer between the two phases, and the dominant transfer path (sediment to water/water to sediment) is different between different metals, independent of their origin (crustal, anthropogenic or marine-related). Several scenarios were derived from the conceptualisation of metal behaviour. These in turn were then used to develop real-world scenarios of metal transport in rivers based on the field data. The conceptualisation of metal behaviour confirmed that each metal is likely to have a dominant phase of transport (sediment/water), which is influenced by the dominant transfer path of that metal between water and sediments.