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Waste Management & Research
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Improving the adsorption capacity and solid structure of natural volcanic soil using a foaming-sintering process based on recycled polyethylene terephthalate (PET)

Rodrigo Navia

Department of Chemical Engineering, University of La Frontera, P.O. Box 54-D, Temuco, Chile, rnavia{at}ufro.cl

Olga Rubilar

Department of Chemical Engineering, University of La Frontera, P.O. Box 54-D, Temuco, Chile

M. Cristina Diez

Department of Chemical Engineering, University of La Frontera, P.O. Box 54-D, Temuco, Chile

Karl-Heinz Schmidt

University of Applied Sciences Wildau, Friedrich Engels Strasse 63, 15745 Wildau, Germany

Gerhard Behrendt

University of Applied Sciences Wildau, Friedrich Engels Strasse 63, 15745 Wildau, Germany

Karl E. Lorber

Department of Sustainable Waste Management and Technology, University of Leoben, Peter Tunner Strasse 15, 8700 Leoben, Austria

The volcanic soils of southern Chile have demonstrated a high capacity to adsorb environmental pollutants, but for an industrial application, a stable solid material is necessary. The objective of this work was to produce a stable ceramic material through a process involving volcanic soil-polyurethane foam produced with recycled polyethylene terephthalate (PET)- polyols, and further thermal treatment. The selected foam formulation with 35.4% volcanic soil (< 63 µm) seems to be the most suitable for thermal treatment, with temperature steps at 700, 850, 1000 and 1200°C. The porous ceramic material obtained has a stable solid form and an improved chlorophenols adsorption capacity (comparable to natural zeolites) that makes it suitable for advanced wastewater treatment and landfill leachate depuration.

Key Words: Adsorption • chlorophenols • polyol • recycled polyethylene terephthalate (PET) • volcanic soil • wmr 1017-9

Waste Management & Research, Vol. 25, No. 2, 119-129 (2007)
DOI: 10.1177/0734242X07072496
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