Parameteric Optimization of Dye Removal by Electrocoagulation Using Taguchi Methodology

Abstract

This paper utilizes a statistical approach, the Taguchi optimization methodology (L16 orthogonal array), to determine the optimum conditions for the orange-G (OG) dye removal from aqueous solution by electrocoagulation (EC) using iron plate electrodes. The experimental parameters investigated were initial dye concentration (C0): 50-200 mg/l; initial pH (pH0): 2-8; supporting electrolyte (NaCl) concentration (m): 0-1.5 g/l; electrode gap (g):1-2.5 cm; and applied voltage (Vap): 6-24 V. These parameters were varied at four levels to see their effects on the removal efficiency (RE). Vap was found to be the most significant factor with a 24.6 percent contribution, followed by parameter C0 with 20.2 percent contribution to the RE. The predicted optimum value of RE for C0 = 200 mg/l was found to be 84.9 percent. Confirmation experiments have been performed to prove the effectiveness of the Taguchi technique after the optimum levels of process parameters are determined.

Optimization of Acid Black 172 decolorization by electrocoagulation using response surface methodology

“…[25] and Srivastava et al . [26] expressed that initial dye concentration is one of the most important factors in decolorization optimization respectively by Factorial and Taguchi designs, which is similar to our results.…”

“…[20] study groups, respectively. Lower optimum initial pHs were also obtained by other researchers [26,27,29]. …”

Removal of toxic hydroquinone: Comparative studies on use of iron impregnated granular activated carbon as an adsorbent and catalyst

“…where,   represents the overall mean of response, and   ,   ,   and   are the average value of response at optimum level for parameters A, B, C and D, respectively. Confidence intervals for the population (CI POP ) and for confirmation experiments (CI CE ) as given in literature [41][42][43]. Three confirmation experiments were performed at the predicted optimum conditions [44][45][46].…”

Photocatalytic Oxidation of Dye Bearing Wastewater by Iron Doped Zinc Oxide

“…2 Azo dyes constitute 60−70% of all dyestuffs produced. 4,5 Dyes having one or more azo groups (R 1 NNR 2 ) and aromatic rings mostly substituted by a sulfonate group (-SO 3 ) or a hydroxyl group (-OH) are referred as azo dyes. 6,7 Textile dyes in wastewater are not only a source of nonaesthetic pollution but are health hazards as well.…”

“…According to the World Bank estimates, 17–20% of the industrial wastewater comes from textile and dyeing industries. , Wastewaters from textile industries contain considerable amounts of nonfixed dyes, especially azo-dyes, and a huge amount of inorganic salts . Azo dyes constitute 60–70% of all dyestuffs produced. , Dyes having one or more azo groups (R 1 NNR 2 ) and aromatic rings mostly substituted by a sulfonate group (-SO 3 ) or a hydroxyl group (-OH) are referred as azo dyes. , Textile dyes in wastewater are not only a source of nonaesthetic pollution but are health hazards as well. Therefore, it is very crucial to investigate techniques to remove these harmful azo dyes from wastewater …”