Evaluating Water Lead Levels During the Flint Water Crisis,Environmental Science & Technology

当前位置： X-MOL 学术 › Environ. Sci. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Evaluating Water Lead Levels During the Flint Water Crisis
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2018-07-11 , DOI: 10.1021/acs.est.8b00791
Kelsey J. Pieper ₁ , Rebekah Martin ₁ , Min Tang ₁ , LeeAnne Walters ₂ , Jeffrey Parks ₁ , Siddhartha Roy ₁ , Christina Devine ₁ , Marc A. Edwards ₁

Affiliation

In April 2014, the drinking water source in Flint, Michigan was switched from Lake Huron water with phosphate inhibitors to Flint River water without corrosion inhibitors. The absence of corrosion control and use of a more corrosive source increased lead leaching from plumbing. Our city-wide citizen science water lead results contradicted official claims that there was no problem– our 90th percentile was 26.8 μg/L, which was almost double the Lead and Copper Rule action level of 15 μg/L. Back calculations of a LCR sampling pool with 50% lead pipes indicated an estimated 90th percentile lead value of 31.7 μg/L (±4.3 μg/L). Four subsequent sampling efforts were conducted to track reductions in water lead after the switch back to Lake Huron water and enhanced corrosion control. The incidence of water lead varied by service line material. Between August 2015 and November 2016, median water lead reduced from 3.0 to <1 μg/L for homes with copper service lines, 7.2–1.9 μg/L with galvanized service lines, and 9.9–2.3 μg/L with lead service lines. As of summer 2017, our 90th percentile of 7.9 μg/L no longer differed from official results, which indicated Flint’s water lead levels were below the action level.

中文翻译：

在火石水危机期间评估水铅水平

2014年4月，密歇根州弗林特的饮用水源从具有磷酸盐抑制剂的休伦湖水转换为不含腐蚀抑制剂的弗林特河水。没有腐蚀控制和使用腐蚀性较强的材料会增加铅从管道中的浸出。我们全市范围内的公民科学用水铅结果与官方声称没有问题的说法相矛盾-我们的第90个百分位数是26.8μg/ L，几乎是铅和铜规则行动水平15μg/ L的两倍。对铅含量为50％的LCR采样池的反算表明，铅含量的第90个百分位数估计为31.7μg/ L（±4.3μg/ L）。随后进行了四次采样工作，以追踪切换回休伦湖水和增强腐蚀控制后水铅的减少。水铅的发生率因服务管线材料而异。在2015年8月至2016年11月之间，铜制服务线的房屋中水铅含量从3.0降至<1μg/ L，镀锌服务线的房屋中水铅含量从7.2–1.9μg/ L降低，铅服务线的房屋中铅含量从9.9–2.3μg/ L下降。截至2017年夏季，我们的7.9μg/ L的第90个百分位数不再与官方结果相差无几，这表明Flint的水铅水平低于行动水平。

更新日期：2018-07-12

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11