Calcium carbonate equilibria in water supply systems

• Autorzy: Dąbrowski W. , Buchta R. , Dąbrowska B. , Ian Mackie R.
• Języki publikacji: EN

Abstrakty

EN

Water corrosion causes substantial damage to ductile, cast iron and steel water distribution systems. The corrosiveness of water depends on many physical, chemical, and even microbiological parameters. Stability indexes in respect of calcium carbonate like the Langelier Saturation Index (LSI) are also considered. First, the roles of inorganic complexes of calcium and manganese are discussed with respect to the accuracy of the calcium carbonate equilibrium calculations. As long as the drinking water parameters were below the EC Directive permissible values, neglecting these complexes had a small effect on the results of LSI computations. A model for computing LSI in water mixtures closed to the atmosphere was presented and partially verified on a small laboratory scale. Waters produced by all water treatment plants serving Kraków were evaluated in respect of the LSI, buffer capacity, and other parameters characterizing corrosive properties of water - in respect to iron. In general, the waters differed significantly in buffer capacity but all were evaluated as not presenting serious problems in internal corrosion of iron and cast iron, or more recently ductile iron pipes. This conclusion was verified based on a survey of main pipelines transporting water from the largest intake to the town, on the computations of the pipe roughness coefficient and on the mass balance of iron along the main transit pipes.

Słowa kluczowe

EN

water treatment; calcium carbonate; potable water; water distribution systems; water supply; water corrosion; drinking water; Langelier saturation index; carbonation

PL

karbonatacja; węglan wapnia; uzdatnianie wody; woda pitna; wodociągi; zaopatrzenie w wodę; korozja wodna; indeks nasycenia Langeliera; nasycenie wody węglanem wapnia

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2010
• Tom: Vol. 36, nr 2
• Strony: 75--94
• Opis fizyczny: bibliogr. 14 poz.

Twórcy

autor

Dąbrowski W.

autor

Buchta R.

autor

Dąbrowska B.

autor

Ian Mackie R.

• Department of Water Supply and Environmental Engineering, Cracow University of Technology, ul. Warszawska 24, 31-155 Kraków,

Bibliografia

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