Impact of hydraulic loading on the removal of separate and mixed heavy metals in porous concrete.

IF 5.8 3区环境科学与生态学 0 ENVIRONMENTAL SCIENCES

Environmental Science and Pollution Research Pub Date : 2025-09-28 DOI:10.1007/s11356-025-36908-0

Murugan Muthu

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Abstract

Porous concrete roads have a strong potential to immobilize different heavy metals from urban runoff. The immobilization potential is highly dependent on the characteristics of the cementitious binder and hydraulic loads. In this study, the effect of hydraulic loading on the removal of separate and mixed heavy metal ions from simulated industrial wastewater was investigated in a fixed bed based on porous concrete. Cadmium, copper, zinc, and lead were mixed into the wastewater and passed through porous concrete samples operated with full and empty water heads throughout the experiment. The removal of these ions reached a level of more than 93% when they were passed separately, but such removal was found to be greatly affected when the hydraulic load was maintained to a maximum in the concrete samples. The pH of wastewater percolated through concrete samples has become alkaline as a result of the leaching of calcium ions from the cement components. This calcium leaching was found to occur more in the case of concrete samples operated with zero hydraulic load. These findings highlight the importance of heavy metal-ion contact time when designing porous concrete water filters to treat wastewater disposed of by the electroplating and pigment manufacturing industries.

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水力荷载对多孔混凝土中分离和混合重金属去除的影响。

多孔混凝土道路具有从城市径流中固定不同重金属的强大潜力。固定电位高度依赖于胶凝粘合剂的特性和水力载荷。在多孔混凝土固定床上，研究了水力加载对模拟工业废水中分离和混合重金属离子的去除效果。在整个实验过程中，镉、铜、锌和铅被混合到废水中，并通过多孔混凝土样品在满水头和空水头的操作下通过。当它们单独通过时，这些离子的去除率达到93%以上，但在混凝土样品中保持最大水力荷载时，这种去除率受到很大影响。通过混凝土样品渗透的废水的pH值由于钙离子从水泥组分中浸出而变成碱性。这种钙浸出被发现发生更多的情况下，混凝土样品操作与零水力负荷。这些发现强调了重金属离子接触时间在设计多孔混凝土滤水器处理电镀和颜料制造工业废水时的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Environmental Science and Pollution Research 环境科学-环境科学

CiteScore

8.70

自引率

17.20%

发文量

6549

审稿时长

3.8 months

期刊介绍： Environmental Science and Pollution Research (ESPR) serves the international community in all areas of Environmental Science and related subjects with emphasis on chemical compounds. This includes: - Terrestrial Biology and Ecology - Aquatic Biology and Ecology - Atmospheric Chemistry - Environmental Microbiology/Biobased Energy Sources - Phytoremediation and Ecosystem Restoration - Environmental Analyses and Monitoring - Assessment of Risks and Interactions of Pollutants in the Environment - Conservation Biology and Sustainable Agriculture - Impact of Chemicals/Pollutants on Human and Animal Health It reports from a broad interdisciplinary outlook.