Nanofibrous membrane of polyacrylonitrile with efficient adsorption capacity for cadmium ions from aqueous solution: Isotherm and kinetic studies
| Autor: | Abdulrahman Ali Alazba, Muhammad Tahir Amin, M. Shafiq |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
010302 applied physics
Aqueous solution Polyacrylonitrile General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Electrospinning chemistry.chemical_compound Adsorption chemistry Chemical engineering Physisorption Chemisorption Nanofiber 0103 physical sciences Surface modification General Materials Science 0210 nano-technology |
| Zdroj: | Current Applied Physics. 40:101-109 |
| ISSN: | 1567-1739 |
| DOI: | 10.1016/j.cap.2021.03.018 |
| Popis: | The nanofibrous membrane of polyacrylonitrile (NMP) was successfully synthesized after NaOH and NaHCO3 treatment aiming its functionalization using electrospinning for cadmium ion (Cd2+) adsorption. Field emission scanning electron microscopy (FE-SEM) revealed that small particles attached to the surface of functionalized PAN nanofibers. Equilibrium was attained after 60 min following a rapid uptake of Cd2+ with maximum adsorption capacity and percentage removal at an optimum solution pH of 7.0. The adsorbent dose of 0.3 g and 90 mg L−1 of initial Cd2+ concentration yielded the maximum adsorption capacity. The pseudo-second-order kinetic model was the best fitted to the adsorption data, indicating that the chemisorption is the controlling mechanism of adsorption. The physisorption was proposed based on the calculated values of the mean free energy of adsorption from the D–R isotherm (E |
| Databáze: | OpenAIRE |
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