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

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...

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Bibliographic Details
Published in:	Environmental research Vol. 219; p. 115054
Main Authors:	de Oliveira, Cristiane, Renda, Carmem G., Moreira, Ailton J., Pereira, Otávio A.P., Pereira, Ernesto C., Freschi, Gian P.G., Bertholdo, Roberto
Format:	Journal Article
Language:	English
Published:	Netherlands Elsevier Inc 15-02-2023
Subjects:	Adsorption Atrazine Carbon Ecosystem Environmental Restoration and Remediation Graphite Graphitization. porous carbon. atrazine. adsorption. environmental remediation Hydrogen-Ion Concentration Iron Kinetics Porosity Water Water Pollutants, Chemical - analysis Graphitization. porous carbon. atrazine. adsorption. environmental remediation
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Summary:	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. •High porosity graphitic and magnetic carbon from phenolic resin and ferrocene.•Very high efficiency for adsorptive removal of atrazine (>95% in only 20 min).•Process sustainability proven by reuse studies for up to 4 application cycles.•The adsorbent separation process is facilitated by the material's magnetism.•Applicability in natural water matrices for environmental remediation.
ISSN:	0013-9351 1096-0953
DOI:	10.1016/j.envres.2022.115054