Removal of 2,4-Dichlorophenoxyacetic Acid from Aqueous Solutions Using Al<sub>2</sub>O<sub>3</sub>/Graphene Oxide Granules Prepared by Spray-Drying Method
Alexandra Yu. Kurmysheva,
Ekaterina Kuznetsova,
Marina D. Vedenyapina,
Pavel Podrabinnik,
Nestor Washington Solís Pinargote,
Anton Smirnov,
Sergey N. Grigoriev
Affiliations
Alexandra Yu. Kurmysheva
Laboratory of Electric Current Assisted Sintering Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, 127055 Moscow, Russia
Ekaterina Kuznetsova
Laboratory of 3D Structural and Functional Engineering, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, 127055 Moscow, Russia
Marina D. Vedenyapina
N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, 119991 Moscow, Russia
Pavel Podrabinnik
Laboratory of Electric Current Assisted Sintering Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, 127055 Moscow, Russia
Nestor Washington Solís Pinargote
Laboratory of 3D Structural and Functional Engineering, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, 127055 Moscow, Russia
Anton Smirnov
Laboratory of 3D Structural and Functional Engineering, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, 127055 Moscow, Russia
Sergey N. Grigoriev
Laboratory of Electric Current Assisted Sintering Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, 127055 Moscow, Russia
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 Al2O3-0.25%vol. GO powder obtained by spray drying is suitable for the production of adsorbents for toxic herbicides.
