Nitrate removal from water using alum and ferric chloride: A comparative study of alum and ferric chloride efficiency

Authors

  • Ali Ahmad Aghapour Environmental Health Engineering, Department of Environmental Health Engineering, School of Health, Urmia University of Medical Sciences, Urmia, Iran
  • Amir Mohammadi Environmental Health Engineering, Student Research Committee, School of Health, Urmia University of Medical Sciences, Urmia, Iran
  • Heshmatollah Nourmoradi Environmental Health Engineering, Department of Environmental Health Engineering, School of Health, Ilam University of Medical Sciences, Ilam, Iran
  • Sepideh Nemati Environmental Health Engineering, Student Research Committee, School of Health, Urmia University of Medical Sciences, Urmia, Iran
  • Sima Karimzadeh Environmental Health Engineering, Student Research Committee, School of Health, Urmia University of Medical Sciences, Urmia, Iran
Abstract:

Background: Nitrate is an acute and well-known hazardous contaminant, and its contamination of water sources has been a growing concern worldwide in recent years. This study evaluated the feasibility of nitrate removal from water using the traditional coagulants alum and ferric chloride with lower concentrations than those used in the conventional coagulation process. Methods: In this research, two coagulants, alum and ferric chloride, were compared for their efficiency in removing nitrate in a conventional water treatment system. The removal process was done in a batch system (jar test) to examine the effects of coagulant dosages and determine the conditions required to achieve optimum results. Results: The results revealed that ferric chloride at an initial dose rate of 4 mg/L reduced nitrate concentration from 70 mg/L to less than the World Health Organization (WHO) guideline value (50 mg/L N-NO3). However, the removal efficiency of alum was not salient to significant nitrate reduction. Conclusion: In conclusion, ferric chloride was more effective than alumin removing NO-3, even in common dosage range, and can be considered a cost-effective and worthy treatment option to remediate nitrate-polluted water. Furthermore, the removal of nitrate by coagulation can be simple and more economical than other treatment alternatives.

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Journal title

volume 3  issue None

pages  69- 73

publication date 2016-05

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