eng Science and Education Publishing World Journal of Environmental Engineering 2372-3084 2016-05-24 4 2 23 29 10.12691/wjee-4-2-1 WJEE2016421 article Anmoldeep Singh 1 Anshumaan Srivastava 1 Anirudhha Tripathi 1 Narendra Nath Dutt nndutta@rediffmail.com 1 Chemical Engineering, Jaypee University of Engineering and Technology, Guna, India The response surface methodology has been used to determine the optimum conditions for the Brilliant Green dye removal efficiency from aqueous solution by electrocoagulation. The experimental parameters which have been investigated were initial dye concentration: 100-500 mg/L; voltage: 4-12V; NaCl Concentration:0.5-1.5g/l and reaction time: 10-30min. These parameters were changed at three levels according to the Box Behnken Design to evaluate their effects on decolorization through analysis of variance. High R2 value of 96.16% shows a high correlation between the experimental and predicted values and expresses that the second-order regression model is acceptable for Brilliant Green dye removal efficiency. Optimum dye removal efficiency of 99.0% was observed experimentally at NaCl concentration of 0.5008g/l, initial dye concentration of 500 mg/L, applied voltage of 4.0065V and reaction time of 12.22 min, which is close to model predicted (98.9997%) result. http://pubs.sciepub.com/wjee/4/2/1/wjee-4-2-1.pdf brilliant green dye decolorization electrocoagulation response surface methodology box behnken design