1. Removal of 2,4-Dichlorophenoxyacetic Acid from Aqueous Solutions Using Al 2 O 3 /Graphene Oxide Granules Prepared by Spray-Drying Method.
- Author
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Kurmysheva, Alexandra Yu., Kuznetsova, Ekaterina, Vedenyapina, Marina D., Podrabinnik, Pavel, Pinargote, Nestor Washington Solís, Smirnov, Anton, and Grigoriev, Sergey N.
- Subjects
SPRAY drying ,ALUMINUM oxide ,AQUEOUS solutions ,LANGMUIR isotherms ,HERBICIDES ,RAMAN microscopy ,ADSORPTION capacity ,GRAPHENE oxide - Abstract
Within this study, aluminum oxide granules with 0.25%vol. of graphene oxide were prepared by a spray-drying method to make an adsorbent for the 2,4-Dichlorophenoxyacetic acid (2,4-D) herbicide removal from aqueous solutions. The obtained adsorbent was studied using infrared spectroscopy, scanning electron microscopy and Raman spectroscopy. The presence of graphene in the spray-dried powder was confirmed. The adsorption removal of 2,4-D using the obtained material was performed at an ambient temperature by varying the process parameters such as pH and adsorption time. The adsorption of 2,4-D was a monolayer chemisorption according to the Langmuir isotherm pattern and a pseudo-second-order kinetic model. The maximum Langmuir adsorption capacity of the monolayer was 35.181 mg/g. The results show that the Al
2 O3 -0.25%vol. GO powder obtained by spray drying is suitable for the production of adsorbents for toxic herbicides. [ABSTRACT FROM AUTHOR]- Published
- 2024
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