Multi-Response Optimization of Parameters for the Electrocoagulation Treatment of Electroplating Wash-Water using Aluminum Electrodes

This present study investigates Ni and Mg removal from electroplating wash-water employing electrocoagulation with aluminum electrodes. The simultaneous effects of various operating parameters were evaluated and optimized using a central composite design in terms of Ni, Mg removal, COD removal, ener...

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Published inSeparation science and technology Vol. 50; no. 2; pp. 181 - 190
Main Authors Jagati, Vidya Sagar, Srivastava, Vimal Chandra, Prasad, Basheshwar
Format Journal Article
LanguageEnglish
Published Taylor & Francis 22.01.2015
Subjects
Aluminum
cost analysis
Electrocoagulation
Electrodes
Electroplating
Energy consumption
Magnesium
magnesium removal
Nickel
nickel removal
Operating costs
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Summary:This present study investigates Ni and Mg removal from electroplating wash-water employing electrocoagulation with aluminum electrodes. The simultaneous effects of various operating parameters were evaluated and optimized using a central composite design in terms of Ni, Mg removal, COD removal, energy consumption, and operating cost. At these optimum conditions (current density = 86.23 A/m 2 , pH = 7.5, operating time = 60 min, and NaCl dose = 0.5 g/l), 97% Ni removal and 90% Mg removal was achieved with energy consumption of 22.45 kWh per kg Ni removed and operating cost being 4 $ per kg Ni removed. X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis were on the residue obtained.
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ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2014.954672