Response surface analysis of removal of a textile dye by a Turkish coal powder

Alireza Khataee , Leila Alidokht , Aydin Hassani , Semra Karaca

Abstract

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 (<i>R</i><sup>2</sup> = 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

Address

(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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