Adsorption of phenol onto unactivated Moringa oleifera Seed Shells residue by UV -visible spectrophotometer

Daniel Eneji Sani; John O. Idoko; Enyojo Samson Okwute; Matthew Chijioke Apeh

doi:10.30574/gscbps.2020.13.2.0354

Authors

Daniel Eneji Sani Department of Plant Science and Biotechnology, Kogi State University, Kogi- Nigeria.
John O. Idoko Department of Pure and Industrial Chemistry, Bayero University Kano-Nigeria.
Enyojo Samson Okwute Department of Pure and Applied Chemistry, University of Maiduguri. Borno-Nigeria.
Matthew Chijioke Apeh Department of Plant science and Biotechnology, University of Nigeria. Enugu-Nigeria.

DOI:

https://doi.org/10.30574/gscbps.2020.13.2.0354

Keywords:

Phenol, Moringa Oleifera Seed Shells, Adsorption Isotherms, Kinetics, Wastewater Remediation

Abstract

Unactivated adsorbent was prepared from Moringa oleifera seed shells precursor, characterized and evaluated for aqueous phase removal of phenol. The effects of operational parameters such as initial phenolic solution pH and adsorbent dosage on equilibrium sorption were studied. Adsorption isotherms and kinetic experiments performed at (25 ^oC) furnished some equilibrium and kinetic parameters, respectively. UAMSS shows favorable attributes on (pH, bulk density, attrition, iodine number/surface area, surface charge/functional groups and Fourier transform infrared FTIR). Phenol uptake decreases with increase in solution pH for the adsorbent. Maximum adsorption capacity Q_max(mg/g) was (6.95). The optimal pH for phenol adsorption was attained at pH 3, adsorption kinetics obeyed closely pseudo-second-order model. Adsorption of phenol was well described by Langmuir isotherm. The adsorbent shows a promise of applicability in dephenolation of aqueous effluents/wastewater.

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