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Advances in Environmental Research
  Volume 2, Number 4, December 2013 , pages 291-308

Response surface analysis of removal of a textile dye by a Turkish coal powder
Alireza Khataee, Leila Alidokht, Aydin Hassani and Semra Karaca

    In the present study, an experimental design methodology was used to optimize the adsorptive removal of Basic Yellow 13 (BY13) using Turkish coal powder. A central composite design (CCD) consisting of 31 experiments was employed to evaluate the simple and combined effects of the four independent variables, initial dye concentration (mg/L), adsorbent dosage (g/L), temperature (°C) and contact time (min) on the color removal (CR) efficiency (%) and optimizing the process response. Analysis of variance (ANOVA) showed a high coefficient of determination value (R2 = 0.947) and satisfactory prediction of the polynomial regression model was derived. Results indicated that the CR efficiency was not significantly affected by temperature in the range of 12-60°C. While all other variables significantly influenced response. The highest CR (95.14%), estimated by multivariate experimental design, was found at the optimal experimental conditions of initial dye concentration 30 mg/L, adsorbent dosage 1.5 g/L, temperature 25°C and contact time 10 min.
Key Words
    adsorption; coal; organic dye; experimental design; optimization
(1) Alireza Khataee and Leila Alidokht: Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran;
(2) Leila Alidokht: Department of Soil Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran;
(3) Aydin Hassani and Semra Karaca: Department of Chemistry, Faculty of Science, Ataturk University, 25240 Erzurum, Turkey.

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