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标题：Nitrate removal from water using alum and ferric chloride: A comparative study of alum and ferric chloride efficiency
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作者：Ali Ahmad Aghapour ; Sepideh Nemati ; Amir Mohammadi 等
期刊名称：Environmental Health Engineering and Management
印刷版ISSN：2423-3765
电子版ISSN：2423-4311
出版年度：2016
卷号：3
期号：2
页码：69-73
DOI：10.15171/ehemj.2016.03
语种：English
出版社：Kerman University of Medical Sciences
摘要：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..
关键词：Nitrate; Water treatment; Coagulation; Alum; Ferric chloride