Hybrid magnetic CoFe2O4@γ-Fe2O3@CTAB nanocomposites as efficient and reusable adsorbents for Remazol Brilliant Blue R dye

Oliveira, Helena Augusta Lisboa de; Gomide, Guilherme; Vieira, Clauber Alex de Melo; Guerra, Ana Alice Andrade Meireles; Depeyrot, Jerome; Campos, Alex Fabiano Cortez

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Campo DC	Valor	Idioma
dc.contributor.author	Oliveira, Helena Augusta Lisboa de	-
dc.contributor.author	Gomide, Guilherme	-
dc.contributor.author	Vieira, Clauber Alex de Melo	-
dc.contributor.author	Guerra, Ana Alice Andrade Meireles	-
dc.contributor.author	Depeyrot, Jerome	-
dc.contributor.author	Campos, Alex Fabiano Cortez	-
dc.date.accessioned	2022-11-08T23:31:45Z	-
dc.date.available	2022-11-08T23:31:45Z	-
dc.date.issued	2022-09-01	-
dc.identifier.citation	OLIVEIRA, Helena Augusta Lisboa de et. al. Hybrid magnetic CoFe2O4@γ-Fe2O3@CTAB nanocomposites as efficient and reusable adsorbents for Remazol Brilliant Blue R dye. Environmental Technology, 2022. DOI 10.1080/09593330.2022.2115946. Disponível em: https://www.tandfonline.com/doi/full/10.1080/09593330.2022.2115946. Acesso em: 08 nov. 2022.	pt_BR
dc.identifier.uri	https://repositorio.unb.br/handle/10482/45147	-
dc.language.iso	Inglês	pt_BR
dc.publisher	Taylor & Francis	pt_BR
dc.rights	Acesso Restrito	pt_BR
dc.title	Hybrid magnetic CoFe2O4@γ-Fe2O3@CTAB nanocomposites as efficient and reusable adsorbents for Remazol Brilliant Blue R dye	pt_BR
dc.type	Artigo	pt_BR
dc.subject.keyword	Nanoadsorventes magnéticos	pt_BR
dc.subject.keyword	Remoção de corantes	pt_BR
dc.subject.keyword	Remediação de águas	pt_BR
dc.identifier.doi	https://doi.org/10.1080/09593330.2022.2115946	pt_BR
dc.relation.publisherversion	https://www.tandfonline.com/doi/full/10.1080/09593330.2022.2115946	pt_BR
dc.description.abstract1	The main goal of the present survey was to elaborate, characterize and evaluate the efficiency of ferrite-based nanoparticles modified with cetyltrimethylammonium bromide (CTAB) as potential magnetic nanoadsorbents to remove Remazol Brilliant Blue R (RBBR) from water. It is proposed an innovative nanomaterial architecture based on highly magnetic and chemically stable core@shell nanoparticles covered by an adsorptive surface layer of CTAB (CoFe2O4@γFe2O3@CTAB). Samples of two different mean sizes (7.5 and 14.6 nm) were synthesized using a hydrothermal coprecipitation followed by surface treatment and functionalization. Batch tests were performed to evaluate the influence of contact time, temperature, pH, shaking rate, presence of interferents and mean size on the performance of the proposed nanomaterials. The kinetics of the adsorption process followed the pseudo-second-order model with an equilibrium time of 20 min. The adsorption capacity was estimated by the Langmuir isotherm model and was found to be 56.3 mg/g (smaller size) and 45.6 mg/g (larger size) at pH = 3 and a shaking rate of 400 rpm. The process was spontaneous, exothermic, and showed increased randomness. Sulphate ions negatively impacted the removal of RBBR. The best performance of the nanoadsorbent based on smaller mean sizes can be correlated to its larger surface area. Regeneration and readsorption tests showed that the nanoadsorbents retain more than 80% of their original removal capacity, therefore they can be effectively recycled and reused.	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0002-3021-921X	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0002-3564-9008	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0002-1689-573X	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0002-7918-8522	pt_BR
dc.contributor.email	mailto:relex@unb.br	pt_BR
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