Preparation of novel multi-walled carbon nanotubes nanocomposite adsorbent via RAFT technique for the adsorption of toxic copper ions
| Autor: | Younes Saadat, Hossein Hosseinzadeh, Soleyman Hosseinzadeh, Sonia Ramin, Zahra Khodaparast, Shahryar Pashaei |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
Materials science chemistry.chemical_element 02 engineering and technology Carbon nanotube 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound symbols.namesake Adsorption law Environmental Chemistry Reversible addition−fragmentation chain-transfer polymerization Waste Management and Disposal Acrylic acid Nanocomposite Langmuir adsorption model Raft 021001 nanoscience & nanotechnology Pollution Copper 0104 chemical sciences chemistry Chemical engineering symbols 0210 nano-technology |
| Zdroj: | Science of The Total Environment. :303-314 |
| ISSN: | 0048-9697 |
| Popis: | In the present work, polymer-coated multiwalled carbon nanotube (MWCNT) was prepared via RAFT method. First, a novel trithiocarbonate-based RAFT agent was prepared attached chemically into the surface of MWCNT. In addition, the RAFT co-polymerization of acrylic acid and acrylamide monomers was conducted through the prepared RAFT agent. In the next age, the surface morphology and chemical properties of the prepared components were fully examined by using FTIR, 1HNMR, SEM, TEM, XRD and TGA/DTG techniques. Finally, the modified MWCNT composite was employed as an excellent adsorbent for the adsorption of copper (II) ions. The results indicated that ion adsorption basically relies on adsorbing time, solution pH, initial copper concentration, and adsorbent dosage. Further, the adsorption kinetics and isotherm analysis demonstrated that the adsorption mode was fitted with the pseudo-second-order and Langmuir isotherm models, respectively. Based on the results of thermodynamic study, the ion adsorption process was endothermic and spontaneous. Finally, based on the experimental results, the surface functionalized MWCNT with hydrophilic groups could be successfully used as a promising selective adsorbent material in wastewater treatment. |
| Databáze: | OpenAIRE |
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