Defective green coffee (DGC), coffee silverskin (CS) and spent coffee grounds (SCG), three major byproducts of the coffee industry, were magnetically modified by treatment with an aqueous ferrofluid containing magnetite nanoparticles and characterized by SEM, XRD and FTIR. In order to assess their suitability as adsorbents for the removal of pollutants from wastewaters, adsorption and regeneration studies were carried out using methylene blue as a model contaminant. All the materials exhibited high adsorption capacity and the adsorption rate varied in the order: CS > SCG > DGC. In addition, their adsorption capacity remained almost unchanged for at least six adsorption/desorption cycles. These results strongly support their use as new low-cost adsorbents for environmental applications. © 2014, AIDIC Servizi S.r.l.
Magnetically modified agro-industrial wastes as efficient and easily recoverable adsorbents for water treatment / Zuorro, Antonio; Lavecchia, Roberto; Natali, Stefano. - STAMPA. - 38:(2014), pp. 349-354. (Intervento presentato al convegno IBIC2014- 4th International Conference on Industrial Biotechnology tenutosi a Roma nel 8-11 June 2014) [10.3303/cet1438059].
Magnetically modified agro-industrial wastes as efficient and easily recoverable adsorbents for water treatment
ZUORRO, ANTONIO;LAVECCHIA, Roberto;NATALI, Stefano
2014
Abstract
Defective green coffee (DGC), coffee silverskin (CS) and spent coffee grounds (SCG), three major byproducts of the coffee industry, were magnetically modified by treatment with an aqueous ferrofluid containing magnetite nanoparticles and characterized by SEM, XRD and FTIR. In order to assess their suitability as adsorbents for the removal of pollutants from wastewaters, adsorption and regeneration studies were carried out using methylene blue as a model contaminant. All the materials exhibited high adsorption capacity and the adsorption rate varied in the order: CS > SCG > DGC. In addition, their adsorption capacity remained almost unchanged for at least six adsorption/desorption cycles. These results strongly support their use as new low-cost adsorbents for environmental applications. © 2014, AIDIC Servizi S.r.l.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
