Preparation and Characterization of Magnetically Responsive Biosorbents from Coffee Industry Residues

Abstract:

Spent coffee grounds (SCG) and coffee silverskin (CS), the two main coffee industry residues, were magnetically modified by contact with an aqueous ferrofluid containing magnetite nanoparticles. The materials were characterized by SEMEDX analysis, X-ray diffraction and FTIR spectroscopy. Batch adsorption experiments were performed to assess their suitability as biosorbents, using methylene blue as a model pollutant. Adsorption equilibrium data were analysed by the Langmuir model, which allowed estimation of the maximum adsorption capacity. The magnetic biosorbents were easily regenerated by treatment with hydrochloric acid.

• Periodical: Applied Mechanics and Materials (Volume 394)
• Pages: 3-7
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.394.3
• Online since: September 2013
• Authors: Antonio Zuorro, Roberto Lavecchia
• Keywords: Biosorbents, Coffee Silverskin, Ferrofluid, Magnetic Modification, Spent Coffee Grounds

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DOI: 10.1021/jf4005719

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