Technical and mineral level effects of water treatment, corrosion control

Asher Brenner, Kenneth M. Persson, Larry Russell, Ingegerd Rosborg

    Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

    2 Scopus citations

    Abstract

    Hard water with salts of Ca and Mg may cause scaling, and is often softened. Water with toxic substances, e.g. heavy metals, is harmful, and is often treated with different filtering methods, nowadays often reverse osmosis (RO). There are more than 21,000 desalination plants around the world, providing more than 350 million people with drinking water, and there are more to come. RO-treated waters without pH-adjustment tend to be corrosive; causing elevated levels of metals released from especially pipes, e.g. Pb, Fe and Cu, but also lack minerals, causing decreased daily intake and loss of minerals from the body. Even pH-adjusted RO water has very low mineral content. Food boiled in such water also tends to lose minerals. There are indexes to be used as guides to choose a re-mineralization method after RO. However, methods used today don’t take mineral levels in treated drinking water preferable for human consumption into account, as corrosion aspects are only considered. Treatment with dissolution of dolomitic-calcitic limestone (free from toxic elements) giving 30-80 mg/L Ca, 100-300 mg/L HCO3, 10-50 mg/L Mg and 25-100 mg/L SO4, with Ca/Mg 2-3:1 would be preferable for drinking water production.

    Original languageEnglish
    Title of host publicationDrinking Water Minerals and Mineral Balance
    Subtitle of host publicationImportance, Health Significance, Safety Precautions
    PublisherSpringer International Publishing
    Pages127-148
    Number of pages22
    ISBN (Electronic)9783030180348
    ISBN (Print)9783030180331
    DOIs
    StatePublished - 1 Jan 2020

    ASJC Scopus subject areas

    • Chemistry (all)
    • Earth and Planetary Sciences (all)
    • Medicine (all)
    • Engineering (all)
    • Environmental Science (all)

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