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Iron-based subsurface arsenic removal technologies by aeration: A review of the current state and future prospects
Water Research ( IF 12.8 ) Pub Date : 2018-01-04 , DOI: 10.1016/j.watres.2018.01.007
Vu T. Luong , Edgardo E. Cañas Kurz , Ulrich Hellriegel , Tran L. Luu , Jan Hoinkis , Jochen Bundschuh

Arsenic contamination in groundwater is a critical issue and one that raises great concern around the world as the cause of many negative health impacts on the human body, including internal and external cancers. There are many ways to remove or immobilize arsenic, including membrane technologies, adsorption, sand filtration, ion exchange, and capacitive deionization. These exhibit many different advantages and disadvantages. Among these methods, in-situ subsurface arsenic immobilization by aeration and the subsequent removal of arsenic from the aqueous phase has shown to be very a promising, convenient technology with high treatment efficiency. In contrast to most of other As remediation technologies, in-situ subsurface immobilization offers the advantage of negligible waste production and hence has the potential of being a sustainable treatment option. This paper reviews the application of subsurface arsenic removal technologies (SAR) as well as current modeling approaches. Unlike subsurface iron removal (SIR), which has proven to be technically feasible in a variety of hydrogeochemical settings for many years, subsurface arsenic removal is not yet an established solution since it shows vulnerability to diverse geochemical conditions such as pH, Fe:As ratio, and the presence of co-ions. In some situations, this makes it difficult to comply with the stringent guideline value for drinking water recommended by the WHO (10 μg L−1). In order to overcome its limitations, more theoretical and experimental studies are needed to show long-term application achievements and help the development of SAR processes into state-of-the-art technology.



中文翻译:

曝气除铁基地下除砷技术:现状和未来展望

地下水中的砷污染是一个至关重要的问题,并且引起许多对健康的负面影响,包括内部和外部癌症,对人体的影响引起了全世界的极大关注。有多种去除或固定砷的方法,包括膜技术,吸附,砂滤,离子交换和电容去离子。这些表现出许多不同的优点和缺点。在这些方法中,通过曝气进行原位地下砷固定以及随后从水相中去除砷已被证明是一种非常有前途的便捷技术,具有很高的处理效率。与大多数其他As修复技术相比,原位地下固定化的优势在于废物产生量可忽略不计,因此有可能成为可持续的处理选择。本文概述了地下除砷技术(SAR)的应用以及当前的建模方法。地下铁去除(SIR)在多种水文地球化学环境中已被证明在技术上是可行的,与地下铁去除不同,地下砷的去除尚不成熟,因为它显示出对多种地球化学条件(如pH值,Fe:As比)的脆弱性,以及共离子的存在。在某些情况下,这难以遵守世界卫生组织建议的严格的饮用水准则值(10μgL 本文概述了地下除砷技术(SAR)的应用以及当前的建模方法。地下铁去除(SIR)在多种水文地球化学环境中已被证明在技术上是可行的,与地下铁去除不同,地下砷的去除尚不成熟,因为它显示出对多种地球化学条件(如pH值,Fe:As比)的脆弱性,以及共离子的存在。在某些情况下,这难以遵守世界卫生组织建议的严格的饮用水准则值(10μgL 本文概述了地下除砷技术(SAR)的应用以及当前的建模方法。地下铁去除(SIR)在多种水文地球化学环境中已被证明在技术上是可行的,与地下铁去除不同,地下砷的去除尚不成熟,因为它显示出对多种地球化学条件(如pH值,Fe:As比)的脆弱性,以及共离子的存在。在某些情况下,这难以遵守世界卫生组织建议的严格的饮用水准则值(10μgL 地下除砷尚不是一个公认的解决方案,因为它显示出对多种地球化学条件(如pH值,Fe:As比和存在共离子)的脆弱性。在某些情况下,这难以遵守世界卫生组织建议的严格的饮用水准则值(10μgL 地下除砷尚不是一个公认的解决方案,因为它显示出对多种地球化学条件(如pH值,Fe:As比和存在共离子)的脆弱性。在某些情况下,这难以遵守世界卫生组织建议的严格的饮用水准则值(10μgL-1)。为了克服其局限性,需要进行更多的理论和实验研究以显示长期的应用成就,并帮助将SAR过程发展为最新技术。

更新日期:2018-01-04
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