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首页> 外文期刊>Ground Water Monitoring & Remediation >The Effectiveness of Arsenic Remediation from Groundwater in a Private Home
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The Effectiveness of Arsenic Remediation from Groundwater in a Private Home

机译：私人住宅中地下水中砷的修复效果

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摘要

Private wells are the source of drinking water for approximately 15% of households in the United States, but these wells are not regulated or monitored by government agencies. The well waters can contain arsenic, a known carcinogen that occurs in groundwater throughout the nation at concentrations that can exceed the Maximum Contaminant Level defined by the U.S. Environmental Protection Agency (10 ppb). In order to reduce arsenic exposure, homeowners can either rely on bottled water for drinking or install in-house water treatment systems for arsenic removal. Here, we document the arsenic levels associated with these options. We examined 24 different major bottled water brands and found that all have arsenic levels <1.5 parts per billion (ppb), and more than half have levels below our measurement detection limit of 0.005 ppb. For in-house treatment systems, we examined the performance of arsenic removal by point-of-use reverse osmosis filtration, and by whole-house and point-of-use filters containing granulated ferric oxide. Our results show that long-term (2 years) filtration with granulated ferric oxide reduced arsenic in well water from an initial concentration of 4 to 9 ppb down to <0.005 ppb, validating this technology as an effective form of arsenic remediation for private homes.
机译：私人水井是美国约15％的家庭的饮用水来源，但是这些水井不受政府机构的监管。井水可能含有砷，这是一种已知的致癌物质，在全国范围内的地下水中存在，其浓度可能超过美国环境保护署规定的最大污染物水平（10 ppb）。为了减少砷的暴露，房主可以依靠瓶装水饮用或安装室内水处理系统去除砷。在这里，我们记录了与这些选项相关的砷含量。我们检查了24个不同的主要瓶装水品牌，发现它们的砷含量均低于1.5十亿分之一（ppb），一半以上的砷含量低于我们的测量检测极限0.005 ppb。对于室内处理系统，我们检查了使用点反渗透过滤以及含颗粒状三氧化二铁的整个室内和使用点过滤器去除砷的性能。我们的结果表明，用颗粒状三氧化二铁进行的长期过滤（2年）可将井水中的砷从最初的4 ppb降低到9 ppb，降至<0.005 ppb，从而证明该技术是对私人住宅进行砷修复的有效形式。

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