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Box–Behnken design and analysis for liquid–liquid extraction of methyl red dye from its aqueous solution with benzene

P. Kanakasabai, S. Sivamani, and K. Thirumavalavan

Engineering Department, University of Technology and Applied Sciences, Salalah, Oman

 

E-mail: sivmansel@gmail.com

Received: 14 April 2023  Accepted: 28 July 2023

Abstract:

Liquid–liquid extraction has gained huge attention in chemical industries for the removal of valuable products. The aim of this research to optimize the percentage dye removal, distribution coefficient and solvent capacity for liquid–liquid extraction of methyl red dye from its aqueous solution with benzene as an extractant. In this work, effect of parameters such as dye concentration in feed (20–100 ppm), extraction time (10–30 min), and dye solution to solvent ratio (1–3 mL/mL) was examined at constant pH, and temperature of 3, and 27 ± 2 °C. Response surface methodology (RSM)-based Box–Behnken design was used for optimization by considering independent and dependent factors. The optimization results reveal that the percentage dye removal, distribution coefficient and solvent capacity of 81.28%, 4.33 and 21.7 mg/L were achieved at dye concentration in feed, extraction time, and dye solution to solvent ratio of 45 ppm, 27 min, and 1.5 mL/mL, respectively. Thus, benzene could be the potential solvent for liquid–liquid extraction of methyl red dye from its aqueous solution.

Keywords: Methyl red; Benzene; Liquid–liquid extraction; Optimization

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-023-03013-w

 

Chemical Papers 77 (11) 7225–7235 (2023)

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