Characterization of elemental and structural composition of corrosion scales and deposits formed in drinking water distribution systems

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• 作者：Ching-Yu Peng ; Gregory V. Korshin ; Richard L. Valentine ; Andrew S. Hill ; Melinda J. Friedman ; Steve H. Reiber
• 关键词：Corrosion scales ; Composition ; Structure ; Drinking water distribution systems
• 刊名：Water Research
• 出版年：2010
• 出版时间：August 2010
• 年：2010
• 卷：44
• 期：15
• 页码：4570-4580
• 全文大小：307 K

文摘

Corrosion scales and deposits formed within drinking water distribution systems (DWDSs) have the potential to retain inorganic contaminants. The objective of this study was to characterize the elemental and structural composition of extracted pipe solids and hydraulically-mobile deposits originating from representative DWDSs. Goethite (α-FeOOH), magnetite (Fe₃O₄) and siderite (FeCO₃) were the primary crystalline phases identified in most of the selected samples. Among the major constituent elements of the deposits, iron was most prevalent followed, in the order of decreasing prevalence, by sulfur, organic carbon, calcium, inorganic carbon, phosphorus, manganese, magnesium, aluminum and zinc. The cumulative occurrence profiles of iron, sulfur, calcium and phosphorus for pipe specimens and flushed solids were similar. Comparison of relative occurrences of these elements indicates that hydraulic disturbances may have relatively less impact on the release of manganese, aluminum and zinc, but more impact on the release of organic carbon, inorganic carbon, and magnesium.