Application of graphene nanosheet oxide for atrazine adsorption in aqueous solution: synthesis, material characterization, and comprehension of the adsorption mechanism

The present study aimed to investigate the application of graphene oxide (GO) as adsorbent material for the removal of atrazine (ATZ). The material produced was characterized to investigate the characteristics and applied as an adsorbent. The material obtained after the synthesis process presented o...

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Bibliographic Details
Published in:	Environmental science and pollution research international Vol. 28; no. 5; pp. 5731 - 5741
Main Authors:	de Souza Antônio, Rodrigo, Guerra, Ana Carolina Sestito, de Andrade, Murilo Barbosa, Nishi, Letica, Baptista, Aline Takaoka Alves, Bergamasco, Rosângela, Vieira, Angélica Marquetotti Salcedo
Format:	Journal Article
Language:	English
Published:	Berlin/Heidelberg Springer Berlin Heidelberg 01-02-2021 Springer Nature B.V
Subjects:	Adsorbates Adsorbents Adsorption Aquatic Pollution Aqueous solutions Atmospheric Protection/Air Quality Control/Air Pollution Atrazine Comprehension Earth and Environmental Science Ecotoxicology Electrolytes Environment Environmental Chemistry Environmental Health Environmental science Functional groups Graphene Graphite Herbicides Kinetics Nanosheets Oxides Research Article Salts Synthesis Temperature effects Waste Water Technology Water Management Water Pollutants, Chemical - analysis Water Pollution Control Removal Electrolytes Emerging contaminant Adsorption Graphene Herbicide
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Summary:	The present study aimed to investigate the application of graphene oxide (GO) as adsorbent material for the removal of atrazine (ATZ). The material produced was characterized to investigate the characteristics and applied as an adsorbent. The material obtained after the synthesis process presented oxygenated functional groups, which contributed to the development of a good adsorbent material. Studies were carried out to verify the influence of adsorbent material mass and initial pH of ATZ solution in adsorption capacity. Kinetic study determined that pseudo-second-order model best describes adsorbate-adsorbent interaction, with equilibrium time of 72 h. The effect of temperature on the material adsorption capacity was also studied. The Langmuir isotherm is the best fit to describe adsorption process GO-ATZ and maximum adsorption capacity obtained was 23.844 ± 0.694 mg g −1 , at 318 K. Variations in process energies were determined, being a spontaneous adsorption, endothermic and characteristic of physical and chemical adsorption. Finally, influence of salts in solution on adsorption capacity was studied; the conclusion was that the presence of electrolytes affects the adsorption capacity of the material.
ISSN:	0944-1344 1614-7499
DOI:	10.1007/s11356-020-10693-4