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Reactive Barriers for Renaturalization of Reclaimed Water during Soil Aquifer Treatment
Water ( IF 3.4 ) Pub Date : 2020-04-02 , DOI: 10.3390/w12041012
Cristina Valhondo , Jesús Carrera , Lurdes Martínez-Landa , Jingjing Wang , Stefano Amalfitano , Caterina Levantesi , M. Silvia Diaz-Cruz

Managed aquifer recharge (MAR) is known to increase available water quantity and to improve water quality. However, its implementation is hindered by the concern of polluting aquifers, which might lead to onerous treatment and regulatory requirements for the source water. These requirements might make MAR unsustainable both economically and energetically. To address these concerns, we tested reactive barriers laid at the bottom of infiltration basins to enhance water quality improvement during soil passage. The goal of the barriers was to (1) provide a range of sorption sites to favor the retention of chemical contaminants and pathogens; (2) favor the development of a sequence of redox states to promote the degradation of the most recalcitrant chemical contaminants; and (3) promote the growth of plants both to reduce clogging, and to supply organic carbon and sorption sites. We summarized our experience to show that the barriers did enhance the removal of organic pollutants of concern (e.g., pharmaceuticals and personal care products). However, the barriers did not increase the removal of pathogens beyond traditional MAR systems. We reviewed the literature to suggest improvements on the design of the system to improve pathogen attenuation and to address antibiotic resistance gene transfer.

中文翻译:

土壤含水层处理过程中再生水再生的反应性屏障

众所周知,管理含水层补给 (MAR) 可以增加可用水量并改善水质。然而,由于对污染含水层的担忧,其实施受到阻碍,这可能导致对源水的处理和监管要求繁重。这些要求可能使 MAR 在经济上和精力上都不可持续。为了解决这些问题,我们测试了在渗透池底部铺设的反应屏障,以提高土壤通过期间的水质改善。屏障的目标是 (1) 提供一系列吸附位点,以利于化学污染物和病原体的保留;(2) 有利于发展一系列氧化还原状态,以促进最顽固的化学污染物的降解;(3) 促进植物生长,减少堵塞,并提供有机碳和吸附位点。我们总结了我们的经验,表明这些屏障确实增强了对关注的有机污染物(例如,药品和个人护理产品)的去除。然而,障碍并没有增加传统 MAR 系统之外的病原体的去除。我们回顾了文献以建议改进系统设计以改善病原体减毒和解决抗生素抗性基因转移。
更新日期:2020-04-02
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