Preparation and characterization of water-soluble polymers and their utilization in chromium sorption
| Autor: | Luis Basáez, Julio Sánchez, Nicole Mendoza, José Luis Santiago-García, Bernabé L. Rivas |
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| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Thermogravimetric analysis Aqueous solution Molar mass Polymers and Plastics Chemistry Thermal decomposition chemistry.chemical_element Sorption 02 engineering and technology General Chemistry Polymer 021001 nanoscience & nanotechnology Polyelectrolyte Surfaces Coatings and Films Chromium 020401 chemical engineering Polymer chemistry Materials Chemistry 0204 chemical engineering 0210 nano-technology Nuclear chemistry |
| Zdroj: | Journal of Applied Polymer Science. 134:45355 |
| ISSN: | 0021-8995 |
| Popis: | In this article, we study the sorption of chromium from aqueous solutions using water-soluble polymers (WSPs): poly[2-(acryloyloxy) ethyl] trimethylammonium chloride, P(ClAETA); poly[2-(methacryloyloxy) ethyl] trimethylammonium methyl sulfate, P(SAETA); and poly(sodium 4-styrenesulfonate), P(NaSS). These WSPs were obtained by radical polymerization and purified by fractionation through ultrafiltration membranes with different molar mass cut-offs (30 and 100 kDa). The characterization was carried out by thermogravimetric analysis (TGA), FTIR, and 1H-NMR spectroscopies and scanning electron microscopy/energy dispersive X-ray spectroscopy. The chromium retention properties of the polymers were determined in terms of pH, optimal polymer concentration, and the effect of interfering ions. The results show yields above 80% for all of the synthesized WSPs. Characterization by spectroscopy confirmed the chemical structure of the polymers. TGA shows thermal decomposition temperatures of 264 and 324 °C for P(ClAETA) and P(SAETA), respectively. In the case of P(NaSS), the first thermal decomposition begins at approximately 450 °C. Maximum retention of Cr(VI) (100%) by the polymers P(ClAETA) and P(SAETA) was achieved at pH 9, and the maximum retention of Cr(III) (100%) was achieved by P(NaSS) at pH 3. The optimal polymer:Cr molar ratio obtained was 20:1. The retention of chromium(VI) was decreased by the presence of interfering ions, and the hydrodynamic flux was almost constant during ultrafiltration. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45355. |
| Databáze: | OpenAIRE |
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