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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/53817
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dc.creatorBarbara Samartini Queiroz Alvespt_BR
dc.creatorLuiz Arnaldo Fernandespt_BR
dc.creatorRandal J. Southardpt_BR
dc.date.accessioned2023-05-23T18:23:59Z-
dc.date.available2023-05-23T18:23:59Z-
dc.date.issued2021-
dc.citation.volume7pt_BR
dc.citation.spage1pt_BR
dc.citation.epage14pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.heliyon.2021.e08476pt_BR
dc.identifier.issn2405-8440pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/53817-
dc.description.resumoCadmium (Cd) is a highly toxic heavy metal that can become available to the environment from a variety of sources. The thermal transformation of organic residues into biochar can be a sustainable way to reduce cadmium environmental availability and, at the same time, a waste management solution. We studied sixteen biochars in two versions: unaged and aged with hydrogen peroxide (H2O2), regarding their Cd retention capacity. Feedstocks used included softwood biochar (SWB), almond shell (ASB), walnut shell (WSB), sewage sludge (SSB), and coconut shell (CSB); production temperatures varied from 450 to 900 C. The objectives of this research were to understand the role of biochar properties on Cd adsorption rates and to evaluate how properties and adsorption rates vary as a function of H2O2 aging. Feedstock played a more important role than production temperature in determining biochar properties. Cd-adsorption capacity ranged from 0.67 to 415.67 mg/g, and the biochars that adsorbed the most Cd were SSB 700, SWB 800 – i, CSB 600 – m2, ASB 500–1, CSB 600 – m3, WSB 900, and CSB 600. The properties that best explained this variation in Cd retention were ash, sulfur, nitrogen and carbon content. Variation in oxygen content, cation exchange capacity and surface area had less impact of Cd adsorption. The H2O2 aging caused oxygen content to increase in all biochars, but the increase in Cd retention was not significant for the majority of the biochars and aging even reduced the Cd retention in some. Our results may help design biochars with maximized sites for Cd adsorption.pt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICA - INSTITUTO DE CIÊNCIAS AGRÁRIASpt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofHeliyon-
dc.rightsAcesso Abertopt_BR
dc.subjectBiocharpt_BR
dc.subjectAdsorptionpt_BR
dc.subjectAging with H2O2pt_BR
dc.subjectCd remediationpt_BR
dc.subjectSoil chemistrypt_BR
dc.subjectWaste managementpt_BR
dc.subject.otherAdsorçãopt_BR
dc.subject.otherQuímica do solopt_BR
dc.subject.otherGestão de resíduospt_BR
dc.titleBiochar-cadmium retention and its effects after aging with Hydrogen Peroxide (H2O2)pt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.sciencedirect.com/science/article/pii/S2405844021025792?via%3Dihubpt_BR
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