Chitosan/Phosphate Rock-Derived Natural Polymeric Composite to Sequester Divalent Copper Ions from Wateropen access
- Authors
- El Kaim Billah, Rachid; Khan, Moonis Ali; Wabaidur, Saikh Mohammad; Jeon, Byong-Hun; Amira, A. M.; Majdoubi, Hicham; Haddaji, Younesse; Agunaou, Mahfoud; Soufiane, Abdessadik
- Issue Date
- Aug-2021
- Publisher
- MDPI
- Keywords
- chitosan; calcium fluorophosphate; copper; adsorption; regeneration
- Citation
- NANOMATERIALS, v.11, no.8, pp.1 - 17
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOMATERIALS
- Volume
- 11
- Number
- 8
- Start Page
- 1
- End Page
- 17
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/141346
- DOI
- 10.3390/nano11082028
- ISSN
- 2079-4991
- Abstract
- Herein, a chitosan (CH) and fluroapatite (TNP) based CH-TNP composite was synthesized by utilizing seafood waste and phosphate rock and was tested for divalent copper (Cu(II)) adsorptive removal from water. The XRD and FT-IR data affirmed the formation of a CH-TNP composite, while BET analysis showed that the surface area of the CH-TNP composite (35.5 m(2)/g) was twice that of CH (16.7 m(2)/g). Mechanistically, electrostatic, van der Waals, and co-ordinate interactions were primarily responsible for the binding of Cu(II) with the CH-TNP composite. The maximum Cu(II) uptake of both CH and CH-TNP composite was recorded in the pH range 3-4. Monolayer Cu(II) coverage over both CH and CH-TNP surfaces was confirmed by the fitting of adsorption data to a Langmuir isotherm model. The chemical nature of the adsorption process was confirmed by the fitting of a pseudo-second-order kinetic model to adsorption data. About 82% of Cu(II) from saturated CH-TNP was recovered by 0.5 M NaOH. A significant drop in Cu(II) uptake was observed after four consecutive regeneration cycles. The co-existing ions (in binary and ternary systems) significantly reduced the Cu(II) removal efficacy of CH-TNP.
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