TITLE:
Experimental Design Approach with Response Surface Methodology for Removal of Indigo Dye by Electrocoagulation
AUTHORS:
Nizar Barrak, Rabeb Mannai, Manel Zaidi, Moez Kechida, Ahmed Noureddine Helal
KEYWORDS:
Electrocoagulation, Operation Cost, Optimization, Dye
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.4 No.11,
November
11,
2016
ABSTRACT: Treatment
of Indigo dye (leuco form), reduced in the industrial conditions of the
SITEX (Textile Industrial Company), by a batch electrocoagulation using
aluminum electrodes. Response Surface Methodology (RSM) and Box-Behnken design
were used to optimize for Color Removal (CR(%)). Our results showed that the
quadratic second order equation provided the best correlation for the
decolorization of Indigo dye (CR(%)). On the other hand, the ANOVA analysis
proved the large interaction between the current intensity and the initial
concentration of the dye. Experiments were conducted to find the desired
conditions for removal of particular concentration of the dye and lower
Operation Cost. The results showed that CR(%) = 88.3% (R2) of color
removal for initial dye concentration of 12.31 mg/l, with a current density of
2.81 A/m2, solution concentration of NaCl of 2.67 g/l. Under these
conditions, Electrical Energy Consumption (EEC) and Electrode Consumption (EMC)
and Operation Cost were 0.01999 kWh/m3 (R2 = 93.1%),
0.00142768 Kg/m3 (R2 = 79.4%) and 0.000558 US$/m3,
respectively.