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Identification and characterization of steady and occluded water in drinking water distribution systems.
Tong, Huiyan; Zhao, Peng; Zhang, Hongwei; Tian, Yimei; Chen, Xi; Zhao, Weigao; Li, Mei.
Afiliación
  • Tong H; Department of Environmental Engineering, School of Environmental Science and Engineering, Tianjin University, Tianjin, China.
  • Zhao P; Department of Environmental Engineering, School of Environmental Science and Engineering, Tianjin University, Tianjin, China. Electronic address: zhpeng@tju.edu.cn.
  • Zhang H; Department of Environmental Engineering, School of Environmental Science and Engineering, Tianjin University, Tianjin, China.
  • Tian Y; Department of Environmental Engineering, School of Environmental Science and Engineering, Tianjin University, Tianjin, China.
  • Chen X; Department of Environmental Engineering, School of Environmental Science and Engineering, Tianjin University, Tianjin, China.
  • Zhao W; Department of Environmental Engineering, School of Environmental Science and Engineering, Tianjin University, Tianjin, China.
  • Li M; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, China. Electronic address: meili@nju.edu.cn.
Chemosphere ; 119: 1141-1147, 2015 Jan.
Article en En | MEDLINE | ID: mdl-25460754
Deterioration and leakage of drinking water in distribution systems have been a major issue in the water industry for years, which are associated with corrosion. This paper discovers that occluded water in the scales of the pipes has an acidic environment and high concentration of iron, manganese, chloride, sulfate and nitrate, which aggravates many pipeline leakage accidents. Six types of water samples have been analyzed under the flowing and stagnant periods. Both the water in the exterior of the tubercles and stagnant water carry suspended iron particles, which explains the occurrence of "red water" when the system hydraulic conditions change. Nitrate is more concentrated in occluded water under flowing condition in comparison with that in flowing water. However, the concentration of nitrate in occluded water under stagnant condition is found to be less than that in stagnant water. A high concentration of manganese is found to exist in steady water, occluded water and stagnant water. These findings impact secondary pollution and the corrosion of pipes and containers used in drinking water distribution systems. The unique method that taking occluded water from tiny holes which were drilled from the pipes' exteriors carefully according to the positions of corrosion scales has an important contribution to research on corrosion in distribution systems. And this paper furthers our understanding and contributes to the growing body of knowledge regarding occluded environments in corrosion scales.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Abastecimiento de Agua / Agua Potable Tipo de estudio: Diagnostic_studies / Prognostic_studies Idioma: En Revista: Chemosphere Año: 2015 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Abastecimiento de Agua / Agua Potable Tipo de estudio: Diagnostic_studies / Prognostic_studies Idioma: En Revista: Chemosphere Año: 2015 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido