ATIVAÇÃO DO BIOCARVÃO DE EUCALIPTO PARA A REMEDIAÇÃO DE SOLUÇÕES CONTENDO Cd, Cr, Cu e Pb
ATIVAÇÃO DO BIOCARVÃO DE EUCALIPTO PARA A REMEDIAÇÃO DE SOLUÇÕES CONTENDO Cd, Cr, Cu e Pb
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DOI: https://doi.org/10.22533/at.ed.7312407052
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Palavras-chave: biocarvão de eucalipto, ativação com HNO 3 , adsorção, componentes minerais, elementos potencialmente tóxicos
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Keywords: eucalyptus biochar, activation with HNO3, adsorption, mineral components, potentially toxic elements
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Abstract: Pre- and post-pyrolysis biomass treatments have been used to improve the adsorption capabilities of biochar. The objectives of this work were to evaluate the changes that the activation of eucalyptus biochar by HNO 3 produced in the mineral components, physical and chemical attributes and in the adsorption capacity of the potentially toxic elements (EPT) Cd, Cr, Cu and Pb in aqueous solutions. Experiments testing the adsorption selectivity of the same EPTs are rare. Activation of BC with HNO 3 increased the specific surface area and cation exchange capacity and reduced ash and alkalinity of BC HNO3 . Even with greater availability of functional groups, BCHNO3 performed worse than BC in the adsorption of ETP in experiments with unbuffered pH.
- Ricardo Perobelli Borba
- Marilza Silva Vanderlei
- Aline Renee Coscione