Factorial experimental design for the removal of disperse dyes using hydroxyapatite prepared from Moroccan phosphogypsum

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Abstract

Azo dyes are the major known group of synthetic dyes and have given rise to many water and soil environmental problems, most of these azo dyes were used in the textile industry. The aim of this study is the removal of Disperse Blue 79 (DB 79) and Disperse Blue 165 (DB 165) as azo dyes by Hydroxyapatite (HAP). The adsorption experiments were carried out to investigate the factors that influence the dyes uptake by hydroxyapatite, such as the contact time under agitation, adsorbent dosage, initial dye concentration, and pH solutions. To reduce the number of experiments, full factorial experimental design at two levels (24) was used to achieve optimal conditions for the removal of DB 79 and DB 165 from aqueous solutions.

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Joudi, M., Mouldar, J., Hafdi, H., Nasrellah, H., Hatimi, B., El Mhammedi, M. A., & Bakasse, M. (2019). Factorial experimental design for the removal of disperse dyes using hydroxyapatite prepared from Moroccan phosphogypsum. Mediterranean Journal of Chemistry, 8(1), 1–9. https://doi.org/10.13171/mjc811902219mb

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