Volume 24, Issue 120 (1-2015)                   J Mazandaran Univ Med Sci 2015, 24(120): 209-219 | Back to browse issues page

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Amouei A, Borqhei M, Mohseni M, Goodarzi J, Faraji H. Removal of Chromium, Nickel, Zinc and Turbidity from Industrial Wastewater by Electrocoagulation Technology (Case Study: Electroplating and Galvanized Wastewater of Industrial Zone in Boomhen). J Mazandaran Univ Med Sci 2015; 24 (120) :209-219
URL: http://jmums.mazums.ac.ir/article-1-4871-en.html
Abstract:   (7968 Views)
Background and purpose: Heavy metals such as chromium, nickel, and zinc are the most common contaminants found in the plating wastewater that cause environmental pollution due to non-biodegradability. This study investigated the removal of chromium, nickel, zinc and turbidity from wastewater of plating and galvanized industries by electrocoagulation technology. Material and methods: This study was conducted at laboratory scale using four parallel aluminum electrodes (5cm × 10cm dimensions, 1 mm thickness). In each electrode, 6 holes (0.7 cm) were considered. Wastewater samples were first collected as grab sampling and finally changed to combined samples. This study was performed in pH= 3 and pH= 7.2 for plating wastewater and pH= 9 for galvanized wastewater and reaction times of 20, 40, 60 and 80 minutes. Results: Nickel and chromium contents in plating wastewater were 45 and 50 mg/l, respectively. Zinc concentration in galvanized wastewater was determined 210 mg/l. Turbidity in plating and galvanized wastewaters were 250 and 200 NTU, respectively. The maximum removal of nickel and chromium was observed in contact time= 80 min and pH=4, while it was seen in pH=9 for zinc (98 %, 95.6%, and 94%, respectively). The maximum removal of turbidity in Ni – Cr wastewater and galvanized wastewater was 97% and 95.3%, respectively. Conclusion: Electrocoagulation technology was found as an effective, economical and rapid method for infiltration of toxic wastewater in plating and galvanized industries.
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Type of Study: Research(Original) | Subject: Environmental Health

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