Health evaluation of drinking water regarding to scaling and corrosion potential using corrosion indexes in Noorabad city, Iran

Shams Khorramabadi, GHodrato lah and Godini, Hatam and Dargahi, Abdo lah and Tabandeh*, Leila and Mansoori, Loghman (2016) Health evaluation of drinking water regarding to scaling and corrosion potential using corrosion indexes in Noorabad city, Iran. yafte, 18 (1).

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Abstract

Background : Corrosion can cause economic damages, decreased useful life and diseases in the consumers. Therefore, in the present study, the status of potential of corrosion and scaling were investigated in water resources of Noorabad city of Lorestan. Materials and Methods: In this cross-sectional study, samples were collected from 7 wells of drinking water and 2 water storage tanks during from autumn to winter in Noorabad. To do so, parameters including pH, pHs, temperature, calcium hardness, alkalinity and TDS were measured and based on their values, four indexes including Langelier, Ryznar, Aggressive and Pokoryus were determined. Results: Results showed that Langelier, Rayznr, Pokoryus and Aggressive indexes were in the range of +0.07 to +0.61, 7.44 to 8.06, 6.9 to 7.25 and 11.38 to 11.9, respectively. According to the Langelier, Ryznar, Pukorius and Aggressive indexes, all of drinking water sources were corrosive which were studied in Noorabad city. However, according to the Langelier index, all of drinking water sources were sedimentary. Conclusion: Result obtained from studied indexes showed that the drinking water in Noorabad is corrosive and so the water quality in water supply system should be monitored continuously. The best applicable practices for decreasing water corrosion in water supply system are including continuous control of pH, chlorination mechanism and the use of corrosion resistant pipelines and facilities. Keywords: Pukorius and Aggressive indexes, Langelier, Ryznar, Scaling, Water resources, Noorabad

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