Study on Adsorption and Aggregation in the Mixed System of Polyacrylamide, Cu(II) Ions and Innovative Carbon–Silica Composite
Open Access
- 19 April 2020
- Vol. 12 (4), 961
- https://doi.org/10.3390/polym12040961
Abstract
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–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–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 μm, whereas in the mixed Cu(II)/AN PAM system, they were even at 1.04 μm.Keywords
This publication has 44 references indexed in Scilit:
- Turbidimetric Determination of Anionic Polyacrylamide in Low Carbon Soil ExtractsJournal of Environmental Quality, 2013
- An overview of protein adsorption on metal oxide coatings for biomedical implantsSurface and Coatings Technology, 2013
- Removal possibilities of colloidal chromium (III) oxide from water using polyacrylic acidEnvironmental Science and Pollution Research, 2012
- Adsorption and Desorption of Bioactive Proteins on Hydroxyapatite for Protein Delivery SystemsJournal of Drug Delivery, 2012
- Potential Role of Soil in the Transmission of Prion DiseaseReviews in Mineralogy and Geochemistry, 2006
- An in situ ATR–FTIR study of polyacrylamide adsorption at the talc surfaceJournal of Colloid and Interface Science, 2005
- Polyacrylamide at Solid/Liquid InterfacesJournal of Colloid and Interface Science, 1999
- Fouling of heat exchangers in the dairy industryExperimental Thermal and Fluid Science, 1997
- A Simple Expression for Henry's Function for the Retardation Effect in Electrophoresis of Spherical Colloidal ParticlesJournal of Colloid and Interface Science, 1994
- Colorimetric Determination of Copper with AmmoniaIndustrial & Engineering Chemistry Analytical Edition, 1941