Title: Biosorption of methylene blue (MB) dye using agricultural waste Parkia speciosa: one factor at a time method (OFAT), isotherm and kinetic studies

Authors: Darshaleka Chellappa; Soundarajan Krishnan; Padmesh Tirunelveli Narayanapillai

Addresses: Department of Chemical Engineering, School of Engineering and Computing, MILA University, Nilai, 71800, Negeri Sembilan, Malaysia ' Department of Chemical Engineering, School of Engineering and Computing, MILA University, Nilai, 71800, Negeri Sembilan, Malaysia ' Department of Chemical Engineering, School of Engineering and Computing, MILA University, Nilai, 71800, Negeri Sembilan, Malaysia

Abstract: Wastewater from dye industries has become an ecological environmental issue. In this research, the agricultural waste 'Parkia speciosa' (PS) was used as a bio-sorbent for the sequestration of Methylene Blue (MB) dye. The biosorption process was performed by varying several parameters (pH, temperature, PS dosage, and MB concentration). It utilised the two-parameter models (Langmuir, Freundlich), three-parameter models (Redlich-Peterson, Toth), kinetic models (Pseudo-first order, Pseudo-second order, Intraparticle diffusion, & Elovich) with biosorption capacity of 80.126 mg/g. Thermodynamics parameters were revealed with spontaneous and endothermic processes. This research demonstrates that the Parkia speciosa bio-sorbent proves to be an economically viable option for effectively capturing MB from aqueous solutions.

Keywords: biosorption; methylene blue; isotherm; kinetics; thermodynamics; agricultural waste; wastewater contaminants.

DOI: 10.1504/IJNBM.2024.143830

International Journal of Nano and Biomaterials, 2024 Vol.10 No.4, pp.235 - 249

Received: 18 Dec 2023
Accepted: 06 Mar 2024
Published online: 09 Jan 2025 *

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