Environmental Health Engineering and Management Journal
Environmental Health Engineering and Management Journal
Environ. Health Eng. Manag.
Medical Sciences
http://ehemj.com
1
admin
2423-3765
2423-4311
8
7
14
8888
13
en
jalali
1400
5
1
gregorian
2021
8
1
8
3
online
1
fulltext
en
Evaluation of the efficiency of electrocoagulation process in removing cyanide, nitrate, turbidity, and chemical oxygen demand from landfill leachate
عمومى
General
مقاله اصیل
Original Article
<div style="text-align: justify;"><span class="fontstyle0">Background: </span><span class="fontstyle2">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</span><span class="fontstyle2" style="font-size:5pt;">-</span><span class="fontstyle2">), nitrate (NO3</span><span class="fontstyle2" style="font-size:5pt;">-</span><span class="fontstyle2">), turbidity, and chemical oxygen<br>
demand (COD) from leachate by electrocoagulation process.</span><br>
<span class="fontstyle0">Methods: </span><span class="fontstyle2">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.</span><br>
<span class="fontstyle0">Results: </span><span class="fontstyle2">In this study, at a current density of 33 mA/cm</span><span class="fontstyle2" style="font-size:5pt;">2 </span><span class="fontstyle2">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.</span><br>
<span class="fontstyle0">Conclusion: </span><span class="fontstyle2">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.</span></div>
Electrocoagulation, Cyanides, Nitrates, Chemical oxygen demand analysis, Solid waste
237
244
http://ehemj.com/browse.php?a_code=A-10-1-220&slc_lang=en&sid=1
Abdoliman
Amouei
iamouei1966@gmail.com
10031947532846008877
10031947532846008877
No
Environmental Health Research Center (EHRC), Social Determinants of Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
Mehdi
Pouramir
pouramirm@yahoo.com
10031947532846008878
10031947532846008878
No
Clinical Biochemistry Department, Babol University of Medical Sciences, Babol, Iran
Hosseinali
Asgharnia
ehaamin2@gmail.com
10031947532846008879
10031947532846008879
No
Environmental Health Research Center (EHRC), Social Determinants of Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
Mahmoud
Mehdinia
smehdinia@yahoo.com
10031947532846008880
10031947532846008880
No
Environmental Health Research Center (EHRC), Social Determinants of Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
Mohammad
Shirmardi
shirmardim@yahoo.com
10031947532846008881
10031947532846008881
No
Environmental Health Research Center (EHRC), Social Determinants of Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
Hourieh
Fallah
fallah_1347@yahoo.com
10031947532846008882
10031947532846008882
No
Environmental Health Research Center (EHRC), Social Determinants of Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
Asieh
Khalilpour
Asieh.khalilpour@gmail. com
10031947532846008883
10031947532846008883
Yes
Corresponding author:Environmental Health Research Center (EHRC), Social Determinants of Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
Hajar
Tabarinia
tabariniah@yahoo.com
10031947532846008884
10031947532846008884
No
Water Wastewater Chemistry Laboratory, Environmental Health Department, Babol University of Medical Sciences, Babol, Iran