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- Title
Moringa oleifera (seed husk, seed cake and water-soluble protein) as a natural adsorbent for the removal of multi-class pharmaceuticals from water.
- Authors
Tegegne, Bisratewongel; Chandravanshi, Bhagwan Singh; Zewge, Feleke; Chimuka, Luke
- Abstract
The adsorption of Moringa oleifera seed cake, seed husk and water-soluble protein was studied for the removal of multi-class pharmaceuticals from water. The characteristic surface chemistry of the adsorbents was studied by Fourier-transform infrared spectroscopy analysis and scanning electron microscopy. Parameters affecting the extraction efficiency including pH, contact time and initial pharmaceutical concentration were optimized. The optimum conditions were found to be a sample pH of 5, a contact time of 80 min and a 0.5 mg/L initial concentration of the analyte. Equilibrium and kinetic models for pharmaceuticals adsorption were studied by considering the effects of concentration and contact time at the optimum conditions for each of the Moringa adsorbents. Freundlich's adsorption model was found to fit the experimental data. The kinetics of adsorption of all target analytes on the Moringa adsorbent was well defined by the pseudo-second-order model. The adsorption capacity for the seed cake ranged from 3-311, for the seed husk ranged from 7-413 and for water-soluble protein was 2-326 mg/g depending on individual pharmaceutical. The results obtained showed that the use of this plant-based sorbent can be considered as one of the most promising and low-cost for the removal of pharmaceuticals that needs surface modification to improve the adsorption for some pharmaceuticals.
- Subjects
MORINGA oleifera; DRUG adsorption; SURFACE chemistry; ADSORPTION kinetics; SEEDS; CAKE
- Publication
Desalination & Water Treatment, 2023, Vol 307, p92
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2023.29864