AI Article Synopsis
- The study explored how graphene oxide can be used to remove atrazine, a common herbicide, by acting as an adsorbent material.
- The synthesized graphene oxide exhibited oxygenated functional groups that enhanced its adsorptive properties, and the optimal conditions for adsorption were identified, including mass of the adsorbent and initial pH of the solution.
- Results showed that the adsorption followed a pseudo-second-order kinetic model, with maximum capacity at 23.844 mg/g at higher temperatures, and the presence of salts in the solution negatively impacted the adsorption capacity.
Article Abstract
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, 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.
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| http://dx.doi.org/10.1007/s11356-020-10693-4 | DOI Listing |
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