Study on Adsorption and Aggregation in the Mixed System of Polyacrylamide, Cu(II) Ions and Innovative Carbon–Silica Composite
Autor: | V.M. Bogatyrov, M.V. Galaburda, Zofia Sokołowska, Katarzyna Szewczuk-Karpisz |
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Rok vydání: | 2020 |
Předmět: |
Polymers and Plastics
Metal ions in aqueous solution Composite number Potentiometric titration Polyacrylamide Ionic bonding turbidimetry 02 engineering and technology 010402 general chemistry 01 natural sciences Article lcsh:QD241-441 chemistry.chemical_compound Adsorption lcsh:Organic chemistry flocculation mixed adsorption layer Fourier transform infrared spectroscopy particle sizeanalysis Chemistry adsorption and aggregation mechanism Cationic polymerization General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences 0210 nano-technology Nuclear chemistry |
Zdroj: | Polymers Volume 12 Issue 4 Polymers, Vol 12, Iss 961, p 961 (2020) |
ISSN: | 2073-4360 |
Popis: | The paper presents an original study on adsorption and aggregation phenomena in a mixed system consisting of a macromolecular compound, heavy metal ions and an innovative adsorbent. The authors used ionic polyacrylamides (PAM), Cu(II) ions and carbon&ndash silica composite (C-SiO2) in the experiments. Such a system has not yet been described in the literature and therefore, the article is of significant novelty and great importance. The composite was prepared by mixing phenol&ndash formaldehyde resin with silica and pyrolysis at 800 ° C. The adsorbed amounts of Cu(II) ions and PAM were determined spectrophotometrically. C-SiO2 was characterized using potentiometric titration, microelecrophoresis and Fourier Transform Infrared Spectroscopy (FTIR) analysis. In turn, the C-SiO2 aggregation was established turbidimetrically as well as using a particle size analyzer. The obtained results indicated that both Cu(II) ions and ionic polyacrylamide were adsorbed on the composite surface at pH 6. The highest noted adsorbed amounts were 9.8 mg/g for Cu(II) and 35.72 mg/g for CT PAM-25%. Cu(II) ions increased the anionic PAM adsorbed and reduced the cationic PAM one. The adsorption of anionic PAM (50 ppm) stimulated the solid aggregation significantly. What is more, Cu(II) ions enhanced this process. The size of particles/aggregates formed without additives equaled 0.44 &mu m, whereas in the mixed Cu(II)/AN PAM system, they were even at 1.04 &mu m. |
Databáze: | OpenAIRE |
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