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:: Volume 8, Issue 3 (Summer 2021) ::
Environ. health eng. manag. 2021, 8(3): 237-244 Back to browse issues page
Evaluation of the efficiency of electrocoagulation process in removing cyanide, nitrate, turbidity, and chemical oxygen demand from landfill leachate
Abdoliman Amouei , Mehdi Pouramir , Hosseinali Asgharnia , Mahmoud Mehdinia , Mohammad Shirmardi , Hourieh Fallah , Asieh Khalilpour , Hajar Tabarinia
Corresponding author:Environmental Health Research Center (EHRC), Social Determinants of Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran , Asieh.khalilpour@gmail. com
Abstract:   (218 Views)
Background: Leachate contains toxic and non-biodegradable substances that are not easily treated by conventional treatment methods. This study investigated the effect of pH, current density, and reaction time parameters on the removal of cyanide (CN-), nitrate (NO3-), turbidity, and chemical oxygen
demand (COD) from leachate by electrocoagulation process.

Methods: This study was an experimental one with direct current using four parallel bipolar aluminum electrodes with 90% purity. The length, width, and thickness of the electrodes were 5 cm, 10 cm, and 2 mm, respectively. There were 6 holes with a diameter of 0.7 cm on each of the electrodes. The samples were prepared from the old leachate of solid waste landfill in Ghaemshahr, Iran.
Results: In this study, at a current density of 33 mA/cm2 and a time of 60 minutes, the optimum removal efficiency of cyanide (100 %) was obtained at pH 5.5 and pH 10. Moreover, the maximum removal of nitrate (99.65 %) and turbidity (86.41 %) were at pH 5.5 and pH 8.3, respectively and the highest removal efficiency of COD (83.14 %) was obtained at pH 10.
Conclusion: The results showed that the removal of cyanide, nitrate, turbidity, and COD increases with increasing current density and reaction time. Due to the proper removal of nitrate and cyanide from leachate by electrocoagulation, nitrate and cyanide amounts were less than the allowable contamination level. Based on the results, electrocoagulation is considered an efficient and effective method for removing nitrate and cyanide from old leachate of municipal solid wastes.
Keywords: Electrocoagulation, Cyanides, Nitrates, Chemical oxygen demand analysis, Solid waste
eprint link: http://eprints.kmu.ac.ir/id/eprint/38226
Full-Text [PDF 1414 kb]   (135 Downloads)    
Type of Study: Original Article | Subject: General
Received: 2021/09/26 | Accepted: 2021/08/1 | Published: 2021/09/26
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Ethics code: IR.MUBABOL.HRI.REC.1397.081

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Amouei A, Pouramir M, Asgharnia H, Mehdinia M, Shirmardi M, Fallah H, et al . Evaluation of the efficiency of electrocoagulation process in removing cyanide, nitrate, turbidity, and chemical oxygen demand from landfill leachate. Environ. health eng. manag.. 2021; 8 (3) :237-244
URL: http://ehemj.com/article-1-820-en.html

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Volume 8, Issue 3 (Summer 2021) Back to browse issues page
مجله مدیریت و مهندسی بهداشت محیط Environmental Health Engineering And Management Journal
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