info:eu-repo/semantics/article
Physically-crosslinked polyvinyl alcohol composite hydrogels containing clays, carbonaceous materials and magnetic nanoparticles as fillers
Fecha
2020-06Registro en:
Sanchez, Laura Mabel; Shuttleworth, Peter Samuel; Waiman, Carolina Vanesa; Zanini, Graciela Pilar; Alvarez, Vera Alejandra; et al.; Physically-crosslinked polyvinyl alcohol composite hydrogels containing clays, carbonaceous materials and magnetic nanoparticles as fillers; Elsevier; Journal of Environmental Chemical Engineering; 8; 3; 6-2020; 1-12; 103795
2213-3437
CONICET Digital
CONICET
Autor
Sanchez, Laura Mabel
Shuttleworth, Peter Samuel
Waiman, Carolina Vanesa
Zanini, Graciela Pilar
Alvarez, Vera Alejandra
Ollier Primiano, Romina Paola
Resumen
Polyvinyl alcohol (PVA)/ Bentonite, acid-modified Bentonite, magnetic nanoparticles and mesoporous carbonaceous composite hydrogels were synthesized via an eco-friendly freeze-thawing technique, which is a simple and non-toxic crosslinking methodology. After thorough characterisation using X-Ray Diffraction (XRD), Scanning Electron microscopy (SEM), Dynamic Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA) and swelling assessment.Furthermore, the prepared materials were tested in order to explore their cadmium adsorption potential, a heavy metal usually found as a pollutant in water bodies. The data obtained showed that PVA has no affinity for cadmium ions but the incorporation of the different fillers makes the materials develop important adsorbent characteristics. Under the selected working conditions, and for a contact time of 1440 min, the maximum amount of cadmium ions adsorbed was 50.9 mg/g, 33.9 mg/g, 42.6 mg/g and 30.5 mg/g for composites containing bentonite; acid-modified bentonite; magnetic nanoparticles and carbonaceous materials, respectively.For all cases the higher the filler amounts the higher the adsorption efficiency.