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Cadmium and lead adsorption and desorption by coffee waste-derived biochars

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dc.contributor.author Carnier, Ruan
dc.contributor.author Coscione, Aline Renée
dc.contributor.author Abreu, Cleide Aparecida de
dc.contributor.author Melo, Leônidas Carrijo Azevedo
dc.contributor.author Silva, Andressa Ferreira da
dc.date.accessioned 2022-11-07T10:34:31Z
dc.date.available 2022-11-07T10:34:31Z
dc.date.issued 2022-02-16
dc.identifier.citation CARNIER, Ruan; COSCIONE, Aline Renée; ABREU, Cleide Aparecida de; MELO, Leônidas Carrijo Azevedo; SILVA, Andressa Ferreira da. Cadmium and lead adsorption and desorption by coffee waste-derived biochars. Bragantia, Campinas, v. 81, p. 1-15, 16 feb. 2022. Available from: https://doi.org/10.1590/1678-4499.20210142. Accessed: 3 nov. 2022. pt_BR
dc.identifier.issn 1678-4499
dc.identifier.uri https://doi.org/10.1590/1678-4499.20210142 pt_BR
dc.identifier.uri http://www.sbicafe.ufv.br/handle/123456789/13619
dc.description.abstract Biochar derived from coffee waste has been reported as a promising material for heavy metal sorption. However, if the intended use is environmental remediation, knowing the extent to which desorption may occur is critical. Thus, the objective of this work was to evaluate the efficiency of spent coffee ground (SCG) and coffee parchment (CP) biochars pyrolyzed at 700 °C under laboratory conditions, in the sorption of Cd and Pb from aqueous solutions, in a pH range from 2 to 10, and their retention after an induced desorption process with a 2.9 pH acetic acid solution. Both biochars were alkaline, and the initial pH of the solution had a large effect on the sorption capacity of SCG but a small effect on the sorption capacity of CP. The Pb sorption capacity was higher for CP (18.6 mg·g–1) than for SCG (11.4 mg·g–1), while both biochars had low Cd retention capacities (1.18 mg·g–1). Coffee parchment also showed the highest Pb retention (30% to 87%), while for Cd there was no difference between CP and SCG biochars. Our results showed that metal precipitation was the main mechanism for metal immobilization and CP biochar proved to be more reliable than SCG, mainly for Pb, due to its higher sorption capacity and lower metal release by desorption than SCG. These characteristics are particularly important for the use of biochar in environmental remediation. Besides that, the biochar production represents an eco-friendly destination for these feedstocks, contributing to the circular economy. pt_BR
dc.format pdf pt_BR
dc.language.iso en pt_BR
dc.publisher Instituto Agronômico (IAC) pt_BR
dc.relation.ispartofseries Bragantia;v. 81, p. 1-15, 16 feb., 2022;
dc.rights Open Access pt_BR
dc.subject Environmental contamination pt_BR
dc.subject Heavy metals pt_BR
dc.subject Remediation pt_BR
dc.subject Biosorbents pt_BR
dc.subject.classification Cafeicultura::Resíduos e subprodutos do café pt_BR
dc.title Cadmium and lead adsorption and desorption by coffee waste-derived biochars pt_BR
dc.type Artigo pt_BR

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