Polymer Coated Vermiculite Iron Composites: Novel Floatable Magnetic Adsorbents for water spilled contaminants

L.C.R. MACHADO, F.W. LIMA, R. PANIAGO, J.D. ARDISSON, K. SAPAG R. M. LAGO

APPLIED CLAY SCIENCE

Elsevier

Lugar: Amsterdam; Año: 2006 vol. 31 p. 207 - 215

0169-1317

Magnetic adsorbents based on vermiculite-iron have been prepared and characterized by magnetic measurements, BET surface area, Mo¨ssbauer spectroscopy, powder X-ray diffraction, scanning electron microscopy, thermogravimetric and differential scanning calorimetric analyses. These magnetic materials show two important features for the remediation of contaminated sites: (i) they float on water and can be used to adsorb/absorb spilled oils and (ii) after adsorption they can be easily removed from the medium by a simple magnetic separation procedure. These magnetic materials have been coated/ hydrophobized with polymers such as epoxy resin and polystyrene improving their oil remotion capacity, floatability and the chemical and mechanical resistance