Immobilised tannin: Efficient trap for nickel and lead ions in aqueous solution
| dc.contributor.author | Olugbemi T. Olaniyan | |
| dc.date.accessioned | 2025-03-12T13:32:24Z | |
| dc.date.available | 2025-03-12T13:32:24Z | |
| dc.date.issued | 2021 | |
| dc.description | NIL | |
| dc.description.abstract | Quantity of water is a major concern, but the quality is of more urgent concern due to heavy metal pollution. In this study, the focus was to develop adsorbents (tannin resin (TR) and iron-doped tannin resin (Fe-TR)) from invasive Acacia mearnsii for Pb 2 + and Ni 2 + in solution. The developed TR and Fe-TR were prepared directly by crosslinking and iron-grafting; respectively with thermal stable at ≤ 350 °C. Surface functionality analysis revealed the presence of chelating groups at ≈ 1688 and 3661 cm − 1 . The crystallite sizes of the adsorbents were smaller compared to tannin; however, the % carbon and nitrogen were significantly higher. Also, the Brunauer Emmet–Teller study revealed that iron-grafting of tannin after crosslinking increases the surface area, pore volume and pore size. Furthermore, the surface morphology of adsorbents indicated a well-defined structure with the formation of a whitish deposit and rough lump-like after ion uptake. Both adsorbents showed a type II isotherm with adsorption capacities of 40.650 mg/g and 13.763 mg/g for Pb 2+ and 120.63 mg/g and 110.74 for Ni 2 + ion by TR and Fe-TR; respectively. The absorbate-adsorbent interactions were observed to be endothermic with negative and positive Gibb’s free energy values for the adsorption of Pb 2 + and Ni 2 + ; respectively. The adsorption kinetics of Ni 2 + is governed by several models; however, Pb 2 + interaction is regulated by Pseudo-second-order model. Furthermore, the data generated offered the possibility of both chemisorption and physisorption processes; highlighting the flexibility and multifunctionality of tannin traps for the erasure of ion impurities in wastewater. | |
| dc.description.sponsorship | NIL | |
| dc.identifier.citation | 4 | |
| dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S2667010021000378 | |
| dc.identifier.uri | https://kwasuspace.kwasu.edu.ng/handle/123456789/4742 | |
| dc.language.iso | en | |
| dc.publisher | Environmental Challenges - ELSEVIER | |
| dc.relation.ispartofseries | NIL; NIL | |
| dc.title | Immobilised tannin: Efficient trap for nickel and lead ions in aqueous solution | |
| dc.title.alternative | Immobilised tannin | |
| dc.type | Article |