Nano-hybrid based on polypyrrole/chitosan/grapheneoxide magnetite decoration for dual function in water remediation and its application to form fashionable colored product
| Autor: | Rehab G. El Sharkawy, Nehal Salahuddin, Beshoy T. Nasr, Hosny A. El-Daly |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Sorbent General Chemical Engineering Nanoparticle Langmuir adsorption model 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Polypyrrole 01 natural sciences Ponceau 4R 0104 chemical sciences chemistry.chemical_compound symbols.namesake Adsorption Polymerization chemistry Chemical engineering Mechanics of Materials symbols Water treatment 0210 nano-technology |
| Zdroj: | Advanced Powder Technology. 31:1587-1596 |
| ISSN: | 0921-8831 |
| DOI: | 10.1016/j.apt.2020.01.030 |
| Popis: | Water treatment has become immensely challenging. Exploring new, quick and cost-effective technique with high efficacy is a great demand for remedying polluted water. A new synthesis route for generating magnetic hybrid based on magnetite-polypyrrole/chitosan/grapheneoxide (M-PPy/CS/GO) nanohybrid material has been reported. First, intercalated CS/GO was prepared followed by oxidative polymerization of pyrrole and in-situ development of magnetite (Fe3O4) nanoparticles on the nanohybrid. Fe(ш) ions is employed as both oxidant for pyrrole to initiate polymerization and as precursor of Fe3O4. Exfoliated GO sheets decorated with spherical and rod magnetic cubic phase was observed. This strategy seems easy without employing additional oxidant or complicated steps. The zero-charge point of the hybrid was well-defined using pH drift method to be 7.2. The synthesized hybrid has saturated magnetization of 17 emu/g. The prepared hybrid showed high adsorption efficiency relevant to purification of Ponceau 4R (P4R) dye contaminated water with easily magnetic separation. Furthermore, the prepared magnetic hybrid showed antimicrobial and antifungal efficacy against E. coli and Fusarium fungi respectively. A few significant parameters influencing the adsorption of dye for example; sorbent mass (0.005, 0.007, 0.01, 0.015, 0.02 g), dye concentration (2.4, 2.88, 3.36, 3.84, 4.32 ppm), pH (2, 4, 6, 8, 10, 12), salt concentration (0.05, 0.1, 0.137 M), temperature (303, 308, 313, 323 K) and contact time (210 minutes) were considered. The highest removal efficiency was attained (85%) at pH = 2, and the most favorable factors accomplished are: adsorbent quantity (0.01 g), initial dye concentration (2.88 ppm) with a good stability up to 4 reuse cycles. Adsorption processes of M-PPy/CS/GO possibly will illustrated by Langmuir isotherm and pseudo-second-order kinetic model. The adsorption method was an endothermic and spontaneous process as confirmed from thermodynamic parameters. Also, the resulted hybrid loaded dye was immobilized onto polymethylmethacrylate in the presence of urea to form colored fashionable product. |
| Databáze: | OpenAIRE |
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