Removal of textile dyes from aqueous solutions by natural phosphate as a new adsorbent |
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| Authors: | Noureddine Barka Ali Assabbane Abederrahman Nounah Larbi Laanab Yhya Aît Ichou |
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| Affiliation: | 1. Equipe de Matériaux, Photocatalyse et Environnement, Département de Chimie, Faculté des Sciences Agadir, BP 8106 Hay Dakhla, Agadir, Morocco;2. Laboratoire des Sciences de l''Environnement, EST Salé, BP.227, Salé-Médina, Morocco;3. Laboratoire de Microscopie, Facultés des Sciences de Rabat, Morocco;1. Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, China;2. Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637000, China;3. Shandong Institute of Metrology, Jinan 250100, China;1. School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia;2. Chemistry Department, College of Science, University of Anbar, Ramadi, Iraq |
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| Abstract: | The objective of this study was to investigate the ability of natural phosphate (NP) to remove textile dyes from aqueous solutions. The adsorption of methylene blue (MB) as a reference molecule for the adsorption studies of organic molecules, basic yellow 28 (BY 28) and reactive yellow 125 (RY 125) representatives of two families of textile dyes was studied in a batch mode. The experimental results show that NP can totally remove MB and BY 28, whereas a low adsorption affinity was found in the case of RY 125. The adsorption rate data were analysed using the pseudo-first order kinetics of Lagergren and the pseudo second order model to determine adsorption rate constants. The isotherms of adsorption data were analyzed by various adsorption isotherm models. The adsorption was temperature- and pH-dependent with a high adsorption capacity of MB and BY 28 in the basic range and a high adsorption of RY125 in an acidic range. |
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