Sustainable adsorption method for the remediation of malachite green dye using nutraceutical industrial fenugreek seed spent

Taqui, Syed Noeman and C. S., Mohan and Khatoon, Bibi Ahmadi and Soudagar, Manzoore Elahi M. and Khan, T. M. Yunus and Mujtaba, M. A. and Ahmed, Waqar and Elfasakhany, Ashraf and Kumar, Ravinder and Pruncu, Catalin I. (2023) Sustainable adsorption method for the remediation of malachite green dye using nutraceutical industrial fenugreek seed spent. Biomass Conversion and Biorefinery, 13 (10). pp. 9119-9130. ISSN 2190-6815 (https://doi.org/10.1007/s13399-021-01827-w)

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Abstract

Nutraceutical industrial fenugreek seed spent (NIFGS), a relatively low-cost material abundantly available with nearly negligible toxicity for the bioremediation of malachite green (MG) dye from aqueous media, is reported. Studies on the various parameters affecting the adsorption capacity of NIFGS were carried out to evaluate the kinetics and the equilibrium thermodynamics. All the experiments were designed at about pH 7. The adsorption isotherm model proposed by Langmuir fits better than the Freundlich isotherm model. Kinetic study data confirms the viability of pseudo-second-order model. Calculated thermodynamic factors suggest that the adsorption phenomenon is endothermic, almost instantaneous, and physical in nature.

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