Improving the adsorption capacity and solid structure of natural volcanic soil using a foaming-sintering process based on recycled polyethylene terephthalate (PET).
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 microm) seems to be the most suitable for thermal treatment, with temperature steps at 700, 850, 1000 and 1200 degrees 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.
Navia
Rodrigo
R
Department of Chemical Engineering, University of La Frontera, P.O. Box 54-D, Temuco, Chile. rnavia@ufro.cl
Rubilar
Olga
O
Diez
M Cristina
MC
Schmidt
Karl-Heinz
KH
Behrendt
Gerhard
G
Lorber
Karl E
KE
D000327:Adsorption; D002733:Chlorophenols / Q000737:chemistry; D003247:Conservation of Natural Resources; D003300:Copper / Q000737:chemistry; D006358:Hot Temperature; D007220:Industrial Waste; D010416:Pentachlorophenol / Q000737:chemistry; D011093:Polyethylene Terephthalates / Q000737:chemistry*; D011140:Polyurethanes / Q000737:chemistry*; D012987:Soil; D012989:Soil Pollutants / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D018508:Water Purification / Q000379:methods
D002733:Chlorophenols; D007220:Industrial Waste; D011093:Polyethylene Terephthalates; D011140:Polyurethanes; D012987:Soil; D012989:Soil Pollutants; D003300:Copper; C028279:polyurethane foam; D010416:Pentachlorophenol; C004762:2,4-dichlorophenol