Polymer coated vermiculite–iron composites: Novel floatable magnetic adsorbents for water spilled contaminants

Magnetic adsorbents based on vermiculite-iron have been prepared and characterized by magnetic measurements, BET surface area, Mössbauer spectroscopy, powder X-ray diffraction, scanning electron microscopy, thermogravimetric and differential scanning calorimetric analyses. These magnetic materials s...

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Bibliographic Details
Published in:Applied clay science 2006-03, Vol.31 (3), p.207-215
Main Authors: Machado, L.C.R., Lima, F.W.J., Paniago, R., Ardisson, J.D., Sapag, K., Lago, R.M.
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Exact sciences and technology
Magnetic composites
Mineralogy
Polymer coating
Silicates
Vermiculite
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Summary:Magnetic adsorbents based on vermiculite-iron have been prepared and characterized by magnetic measurements, BET surface area, Mössbauer 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.
ISSN:0169-1317
1872-9053
DOI:10.1016/j.clay.2005.07.004