Increasing arsenic sorption on red mud by phosphogypsum addition

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorLopes, G.-
Autor(es): dc.creatorGuilherme, L. R. G.-
Autor(es): dc.creatorCosta, E. T. S.-
Autor(es): dc.creatorCuri, N.-
Autor(es): dc.creatorPenha, H. G. V.-
Data de aceite: dc.date.accessioned2026-02-09T12:32:58Z-
Data de disponibilização: dc.date.available2026-02-09T12:32:58Z-
Data de envio: dc.date.issued2019-11-05-
Data de envio: dc.date.issued2019-11-05-
Data de envio: dc.date.issued2013-11-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/37557-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/pii/S0304389412006942-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1163526-
Descrição: dc.descriptionMining by-products have been tested as adsorbents for arsenic in order to reduce As bioavailability. This study evaluated a red mud (RM) treated with or without phosphogypsum (G) in order to improve its As retention. Red mud and G samples and their mixtures were chemically and mineralogically characterized to gather information concerning their composition, which is key for a better understanding of the adsorbent properties. Phosphogypsum was added to RM in the following proportions: 0, 1, 2, 5, 10, and 25% by weight. These mixtures were subjected to As adsorption and desorption and tested for their maximum adsorption capacity of As (AsMAC). Arsenic adsorption increased upon increasing the proportion of G added to RM. The AsMAC at pure RM reached 909 mg kg−1, whereas the 75%-RM + 25%-G mixture sorbed up to 3333 mg kg−1 of As, i.e., a 3.5-fold increase in AsMAC. Using G in mixtures with RM increases the efficiency of As adsorption due to the presence of Ca2+, which alters the charge balance of the adsorbent, leading to the formation of ternary complexes. Addition of G to RM is thus a promising technique to improve As retention, while providing additional value to both by-products, G and RM.-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceJournal of Hazardous Materials-
Palavras-chave: dc.subjectTrace element-
Palavras-chave: dc.subjectAdsorption-
Palavras-chave: dc.subjectDesorption-
Palavras-chave: dc.subjectMining waste-
Título: dc.titleIncreasing arsenic sorption on red mud by phosphogypsum addition-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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