Effectiveness of Ferric Salts to Remove Low Levels of Dosed Copper from NOM-Containing Natural Water
- Zhan, Weixi
- Sathasivan, Arumugam
- Nolan, P.
- Koska, L.
- Heitz, Anna
- Joll, Cynthia
DOIAbstract
Water utilities dose copper in drinking water systems to inhibit/kill microorganisms including algae. Under conditions observed in the systems, the majority of dosed copper is reported to be in dissolved forms of Cu-NOM and inorganic compounds. High concentrations (40 mg/L) of ferric salts are reported to be able to remove large amounts of copper. However, the fate of dissolved copper when a small amount of ferric salts (<2 mg/L) is present in natural water or in the distribution pipes when they are released from the corroded iron pipes are not known. The current paper investigates the mechanisms behind the dissolved copper removal in NOM-containing bulk water. When copper was dosed from 250–800 mg-Cu/L, relatively high solubility was demon...
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