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Evaluation of a graphitic porous carbon modified with iron oxides for atrazine environmental remediation in water by adsorption

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Autor(es):
De Oliveira, Cristiane ; Renda, Carmem G. ; Moreira, Ailton J. ; Pereira, Ernesto C. ; Freschi, Gian P. G. ; Bertholdo, Roberto
Número total de Autores: 6
Tipo de documento: Artigo Científico
Fonte: Environmental Research; v. 219, p. 12-pg., 2022-12-20.
Resumo

In the last decades, the growth of world agricultural activity has significantly contributed to the increased presence of emerging pollutants such as atrazine (ATZ) in aquatic ecosystems. Due to its high stability to the natural or artificial degradation processes, the ATZ environmental remediation by adsorption has been investigated. In this study, a graphitic-porous-carbon- (GPC) based material with magnetic domains was applied to remove ATZ from aqueous solution. ATZ high adsorption efficiency in a reduced time was achieved in the presence of the GPC adsorbent, leading to a detailed investigation of the mechanisms involved in the adsorption processes. Pseudo-first-order (PFO), pseudo-second-order (PSO), Ritchie, Elovich, and Weber-Morris models were applied to calculate the kinetic process efficiency. Likewise, adsorption isotherms based on Langmuir, Freundlich, Temkin, and Redlich-Peterson models were applied for a detailed understanding of the adsorption mechanisms. GPC was successfully applied for ATZ remediation in natural waters, confirming its high potential for treating natural waters contaminated by ATZ using adsorption process. The material can also be recovered and reused for up to 4 application cycles due to its magnetic properties, showing that in addition to ATZ adsorption efficiency, its sustainable use can be achieved. (AU)

Processo FAPESP: 16/20609-8 - EMU concedido no projeto 2014/50249-8: cromatógrafo líquido de ultra-performance com CO2 supercrítico e detector de massas
Beneficiário:Arlene Gonçalves Corrêa
Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
Beneficiário:Elson Longo da Silva
Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
Processo FAPESP: 17/11986-5 - Geração e Armazenamento de Novas Energias: trazendo desenvolvimento tecnológico para o país
Beneficiário:Ana Flávia Nogueira
Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia