当前位置: X-MOL 学术Chemosphere › 论文详情
Corrosion of upstream metal plumbing components impact downstream PEX pipe surface deposits and degradation
Chemosphere ( IF 5.108 ) Pub Date : 2019-07-10 , DOI: 10.1016/j.chemosphere.2019.07.060
Xiangning Huang, Kelsey J. Pieper, H. Kory Cooper, Susana Diaz-Amaya, Dmitry Y. Zemlyanov, Andrew J. Whelton

Plastic pipes have been and are being installed downstream of metal drinking water plumbing components. Prior research has suggested that such pipe configurations may induce plastic pipe degradation and even system failure. To explore the impact of upstream metal plumbing components on downstream plastic pipes, field- and bench-scale experiments were conducted. Six month old galvanized iron pipes (GIPs) and downstream crosslinked polyethylene (PEX) pipes were exhumed from a residential home. Calcium, iron, manganese, phosphorous, and zinc were the most abundant elements on both GIPs and PEX pipes. Black and yellow deposits were found on some of the exhumed PEX pipe inner walls, which were mainly copper, iron, and manganese oxides (CuO, Cu(OH)2, Fe2O3, FeOOH and MnO2). Follow-up bench-scale experiments revealed that metal levels in the drinking water did not always predict metal loadings on plastic pipe surfaces. The pH 4 water resulted in a greater amount of metals released into the bulk water, but the pH 7.5 water resulted in a greater amount of metals deposited on the PEX pipe surfaces. Hot water (55 °C) induced a greater amount of organics released and higher metal loadings on PEX pipe surfaces at pH 7.5. ATR-FTIR analysis showed that at 55 °C, PEX pipes connected to copper and brass components had the greatest oxidation functional group peak intensity (COOC, CO, and COC). This study highlights potential downstream plastic pipe degradation and metal deposition, which may cause plumbing problems and failures for building owners, inhabitants, and water utilities.

更新日期:2019-07-10

 

分享到
评论: 0
期刊列表
高分子化学
医师节
纳米研究精选
招聘实习生
中澳未来科学会议
China in Space
BMC Public Health
北大深研院会议广告
课题组网站
Springer Nature
Nature中文内容
深圳职业技术学院
内蒙古大学王春燕
Prof. David Leigh华东师范大学
北京大学化学学院席振峰
南京大学
试剂库存
X-MOL文献直达记录功能上线
天合科研
2017年中科院JCR分区化学大类列表
化合物查询
down
wechat
bug