ABSTRACT

Although highway runoff has historically been extensively studied, the increasing complexity of stormwater management means that there are still significant gaps regarding the reduction of soluble metals. The work reported in this paper addresses these challenges by analysing the presence and behaviour of iron, copper and zinc in runoff from junction 24 of the M1 motorway in the UK (peak traffic flow: 30,000 vehicles per hour) and comparing it with other urban sources of metals found in the same catchment (a local brook and sewage treatment works). The sampling site included an interceptor and a treatment lagoon and the event monitoring indicated a trend by which the metals did not change their concentration or particulate soluble proportion immediately, hence showing that pre- and post-storm conditions are important factors when analysing the solubility of metals and their behaviour. The data provided further evidence of the important influence of storm characteristics on metal concentrations in highway runoff, in particular the effects of an antecedent dry weather period (ADWP). In addition, this study also helped us to better understand how the release of sodium the application of de-icer for road maintenance in winter affects the availability of zinc.

摘要

尽管公路径流历来被广泛研究，但雨水管理的日益复杂意味着在减少可溶性金属方面仍存在重大差距。本文报告的工作通过分析英国 M1 高速公路 24 号交叉口（高峰交通流量：每小时 30,000 辆汽车）径流中铁、铜和锌的存在和行为，并将其与其他城市来源进行比较，从而解决了这些挑战在同一集水区发现的金属（当地小溪和污水处理厂）。采样点包括一个拦截器和一个处理泻湖，事件监测表明金属没有立即改变其浓度或颗粒可溶性比例的趋势，因此表明，在分析金属的溶解度及其行为时，风暴前后的条件是重要的因素。这些数据进一步证明了风暴特征对高速公路径流中金属浓度的重要影响，特别是前期干旱天气期（ADWP）的影响。此外，这项研究还帮助我们更好地了解钠的释放以及冬季道路维护除冰剂的应用如何影响锌的可用性。