EAGER: Pervious Concrete as a Low Cost Permeable Reactive Barrier for Heavy Metals Removal

1439378 HartEAGER：透水混凝土是一种低成本、可渗透的反应屏障，可去除重金属。低影响开发是一个活跃的研究领域，特别是在雨水和雨水收集的潜在变革性解决方案领域，以及地下水强化处理领域。本项目旨在探索透水混凝土作为雨水处理的有效反应性透水屏障的创新解决方案。此外，人们认为，在透水混凝土中掺入含高碳和硫酸盐的废飞灰将提高污染物的去除能力，同时为这些目前填埋的材料提供新的应用。这些应用以前从未被研究过，尽管材料的性质和化学成分显示出很高的成功潜力。美国环保署将密苏里州列为国家优先名单上领先的超级基金地点，因为许多正在运营和废弃的金属矿山和精炼作业需要进行重金属处理。作为EPSCoR州，这项研究有可能扩大密苏里大学堪萨斯城分校的研究活动，同时造福于该地区。重金属污染由于其在地下水中的迁移性和溶解性，对人类和环境健康都产生了不利影响。这项研究可能带来一种处理雨水的全新方法，同时有益于利用几乎无穷无尽的低成本废物材料--飞灰。成本估计表明，透水混凝土可能比目前的策略便宜4.5到40多倍。处理受污染的地下水的另一个好处是将这些废物从垃圾填埋场中转化为有价物。这个项目将为有兴趣攻读研究生的本科生提供研究经验。拟议的研究将调查两个尚未在文献中调查和报道的新概念。首先，透水混凝土从未被用作反应性渗透屏障。其次，废飞灰并没有被用来增强常规混凝土或透水混凝土中污染物的去除，而水化学表明，透水混凝土在去除雨水中溶解的重金属方面取得了很大的成功。烧杯试验将提供初步的去除能力，以精炼混合物比例，以开发确定去除速率的突破曲线。扫描电子显微镜和X射线荧光都将被用来证实去除速率，并确定污染物在混凝土基质中的存储位置。

1439378HartEAGER: Pervious Concrete as a Low Cost Permeable Reactive Barrier for Heavy Metals RemovalLow impact development is an active area of research and, in particular, in the area of potentially transformative solutions for rainwater and stormwater capture and treatment for groundwater augmentation. This project is to explore innovative solutions of pervious concrete functioning as an effective reactive permeable barrier for stormwater treatment. Additionally, it is believed that incorporating waste fly ash containing high levels of carbon and sulfate into the pervious concrete will enhance the pollutant removal capabilities while providing a new application for these currently landfilled materials. These applications have not been previously investigated, even though the material properties and chemistry suggest a high potential for success. The EPA lists Missouri as the leading superfund site on the National Priority List because of the need for heavy metal treatment resulting from numerous operating and abandoned metal mines and refining operations. As an EPSCoR state, this research has the potential to expand the research activities of the University of Missouri-Kansas City, while benefitting the region. Heavy metal contamination adversely affects both human and environmental health due to their mobility and solubility within groundwater. This research could result in a fundamentally new methodology for treating stormwater while beneficially utilizing a near endless supply of low-cost, waste materials, fly ash. Cost estimates suggest that pervious concrete could be 4.5 to over 40 times cheaper than the current strategies. As an added benefit to treatment of the contaminated groundwater is the valorization and diversion of these waste materials from landfills. This project will provide research experiences for undergraduate students interested in pursuing graduate school.The proposed research will investigate two novel concepts which have not yet been investigated and reported in the literature. First, pervious concrete has never been utilized as a reactive permeable barrier. Second, waste fly ash has not been used to enhance pollutant removal in conventional or pervious concrete, while the aqueous chemistry suggests a high degree of success for pervious concrete to remove dissolved heavy metals from stormwater. Jar tests will provide the initial removal ability to refine the mixture proportions for the development of breakthrough curves for determination of removal rates. Both scanning electron microscopy and X-ray florescence will be used to corroborate removal rates and identify where the pollutants are stored in the concrete matrix.