...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Galvanic Corrosion of Lead by Iron (Oxyhydr)Oxides: Potential Impacts on Drinking Water Quality
【24h】

Galvanic Corrosion of Lead by Iron (Oxyhydr)Oxides: Potential Impacts on Drinking Water Quality

机译：氧化铁（铅）对铅的电偶腐蚀：对饮用水水质的潜在影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Lead exposure via drinking water remains a significant public health risk; this study explored the potential effects of upstream iron corrosion on lead mobility in water distribution systems. Specifically, galvanic corrosion of lead by iron (oxyhydr)oxides was investigated. Coupling an iron mineral cathode with metallic lead in a galvanic cell increased . lead release by 531 μg L~(-1) on average-a 9-fold increase over uniform corrosion in the absence of iron. Cathodes were composed of spark plasma sintered Fe_3O_4 or α-Fe_2O_3 or field-extracted Fe_3O_4 and α-FeOOH. Orthophosphate immobilized oxidized lead as insoluble hydroxypyromorphite, while humic acid enhanced lead mobility. Addition of a humic isolate increased lead release due to uniform corrosion by 81 μg L~(-1) and-upon coupling lead to a mineral cathode-release due to galvanic corrosion by 990 μg L~(-1). Elevated lead in the presence of humic acid appeared to be driven by complexation, with ~(208)Pb and UV_(254) size-exclusion chromatograms exhibiting strong correlation under these conditions (R_(average)~2 = 0.87). A significant iron corrosion effect was consistent with field data: lead levels after lead service line replacement were greater by factors of 2.3-4.7 at sites supplied by unlined cast iron distribution mains compared with the alternative, lined ductile iron.
机译：通过饮用水接触铅仍然是重大的公共健康风险；这项研究探讨了上游铁腐蚀对水分配系统中铅迁移的潜在影响。具体来说，研究了氧化铁（羟基氧化物）对铅的电偶腐蚀。在原电池中，铁矿物阴极与金属铅的耦合增加。铅的平均释放量为531μgL〜（-1）-比不存在铁时的均匀腐蚀增加9倍。阴极由放电等离子体烧结的Fe_3O_4或α-Fe_2O_3或场提取的Fe_3O_4和α-FeO​​OH组成。正磷酸盐固定的氧化铅为不溶性羟基焦晶石，而腐殖酸则提高了铅的迁移率。腐殖质隔离剂的添加由于均匀腐蚀增加了81μgL〜（-1）而增加了铅的释放，偶合偶合导致由于电化学腐蚀增加了990μgL〜（-1）而导致了矿物阴极的释放。腐殖酸存在下铅的升高似乎是由络合作用驱动的，〜（208）Pb和UV_（254）尺寸排阻色谱图在这些条件下表现出很强的相关性（R_（平均值）〜2 = 0.87）。显着的铁腐蚀效果与现场数据一致：与衬里的球墨铸铁相比，由衬里铸铁配电网供电的地点更换铅服务线后的铅含量高2.3-4.7倍。

著录项

  • 来源
    《Environmental Science & Technology》 |2017年第12期|6812-6820|共9页
  • 作者

    Benjamin F. Trueman; Gregory A. Sweet; Matthew D. Harding; Hayden Estabrook; D. Paul Bishop; Graham A. Gagnon;

  • 作者单位

    Department of Civil & Resource Engineering, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada;

    Department of Mechanical Engineering, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada;

    Department of Mechanical Engineering, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada;

    Department of Civil & Resource Engineering, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada;

    Department of Mechanical Engineering, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada;

    Department of Civil & Resource Engineering, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号