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ORIGINAL ARTICLE
Year : 2013  |  Volume : 2  |  Issue : 1  |  Page : 11

Investigation of chlorine decay of water resource in khanbebein city, Golestan, Iran


1 Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
2 Domestic Water and Wastewater Corporation of Golestan Province, Gorgan, Iran
3 Department of Environmental Health Engineering, Faculty of Health, Ilam University of Medical Sciences, Banganjab Complex, Ilam, Iran
4 Environmental Health Research Center, Golestan University of Medical Sciences, Gorgan, Iran

Correspondence Address:
Yousuf Dadban Shahamat
Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran
Iran
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Source of Support: Golestan Water and Wastewater Company,, Conflict of Interest: None


DOI: 10.4103/2277-9183.110137

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Aims: The object of the study was to identify chlorine demand factorsin water and chlorine in Kanbebein City water and eliminating of them. Materials and Methods: Concentration of free and combined residual chlorine with the methods presented in the book "Standard Methods for Water and Wastewater Examination" were measured. Other parameters such as: Temperature, TOC, TDS, pH, EC, nitrate, ammonia, total hardness, alkalinity, iron and manganese were also examined before and after of chlorination. Results: The Highest chlorine decay constant in the short time were in water well was 0.895 mgL -1 h -1 and the least amount of it was 0.0097 mgL -1 h -1 and the Highest chlorine decay constant in the long time were in water well was-0.092Lmg -1 h -1 and the least amount of it was-0.0017 Lmg -1 h -1 that correlated with nitrite, ammonia and iron concentration. Conclusion: The factors that affected short-time chlorine decay constant (k 2 ) were nitrite, ammonia and iron and The factors that affected on long-time chlorine decay constant (k 2 ) were Nitrite, ammonia and iron. The material removal techniques for them were the use of natural resins, zeolite, ion exchange, membrane and aeration methods, oxidation and sedimentation, and filtration.


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