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Treatment of wastewater containing mineral oil by sorption onto granulated cork
Ferreira, C.; Pereira, J.; Pintor, A.; Correia, P.; Silva, J.; Vilar, V.; Botelho, C.; Martins, Ramiro; Orfão, J.; Boaventura, RuiThe aim of this work is the development of a new method to remove oils from wastewaters, namely hydrocarbons. These contaminants, when present in high concentrations, are efficiently removed by physical and chemical processes, such as gravity separators, flocculation and flotation processes; however for low concentrations, these methods are not applicable [1]. Moreover, advanced separation processes such as mem...
Valorisation of cork by-products for the treatment of vegetal and animal oil co...
Pereira, J.P.; Ferreira, C.I.; Pintor, A.M.; Correia, P.; Silva, S.; Vilar, V.; Botelho, C.; Martins, Ramiro; Orfão, J.; Boaventura, RuiIn this study, cork granules, which are by-products of the cork processing industry, were used as biosorbents for the removal of vegetable and animal oils from water. Simple oil-in-water emulsions were created by ultrasonic emulsification and batch adsorption tests were performed by contacting cork with these emulsions for a defined period of time. A mass transfer model was able to predict adequately the kineti...
Studies on sorption and regeneration of granulated cork for oil and grease removal
Pereira, J.; Ferreira, C.; Pintor, A.; Correia, P.; Silva, S.; Vilar, V.; Botelho, C.; Martins, Ramiro; Órfão, J.; Boaventura, RuiThe aim of this work is to develop a method to recover sorbed oil and grease from granulated cork, in order to promote biomass regeneration. Experimental procedure involved biomass saturation with oil, followed by chemical regeneration. Oil removal by elution was tested using HNO3 and NaOH solutions, cationic and anionic surfactants and organic solvents, namely carbon tetrachloride and n-hexane. Chemical desorp...
Copper Removal by Algal Biomass: Biosorbents Characterization and Equilibrium M...
Vilar, V.J.P.; Botelho, C.M.S.; Boaventura, R.A.R.The purpose of this work was to evaluate the potential of algal waste from the agar extraction industry, immobilized in a polymer, and the algae Gelidium itself, the raw material of agar extraction, to remove Cu(II) and Cr(III) from industrial effluents. The study involved a Cu(II) bearing effluent and the mixture of this effluent with an effluent containing Cr(VI), previously reduced to Cr(III). The two efflue...
Removal of Cu and Cr from an industrial effluent using a packed-bed column with...
Vilar, V.J.P.; Botelho, C.M.S.; Cidália Botelho; Boaventura, R.A.R.The purpose of this work was to evaluate the potential of algal waste from the agar extraction industry, immobilized in a polymer, and the algae Gelidium itself, the raw material of agar extraction, to remove Cu(II) and Cr(III) from industrial effluents. The study involved a Cu(II) bearing effluent and the mixture of this effluent with an effluent containing Cr(VI), previously reduced to...
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