Coffee Husk and Lignin Revalorization : modification with Ag Nanoparticles for Heavy Metals Removal and Antifungal Assays

Daniel Fernando Guevara-Bernal, Marlon Yesid Cáceres Ortíz, Jorge Andrés Gutiérrez Cifuentes, Julio Bastos Arrieta, Cristina Palet i Ballús, Angélica María Candela

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Resum

This study presents the use of the modified coffee husk and coffee lignin as sorbents in the heavy metal ions sorption of Pb(II), Cd(II), Cr(III), and Cu(II) in an aqueous solution. The modification of sorbents was carried out by the impregnation method, using silver nitrate (AgNO3) and sodium borohydride (NaBH4) as a nanoparticles' (NPs) precursor, and reducing agent, respectively. The obtained nanocomposite material was morphologically characterized by electron microscopy. In addition, an evaluation of metal ions' sorption, pseudo-first-order, and pseudo-second-order kinetics modeling was performed. Finally, antifungal activity was evaluated on different Candida species. Coffee and lignin modified with AgNPs increased the extraction capacity with the highest sorption for Pb ions with 2.56 mg/g and 1.44 mg/g, respectively.
Idioma originalEnglish
Pàgines (de-a)1796-1812
Nombre de pàgines17
RevistaWater (Switzerland)
Volum14
Número11
DOIs
Estat de la publicacióPublicada - 2022

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