Removal of 2,4-Dichlorophenoxyacetic Acid from Aqueous Solutions Using Al2O3/Graphene Oxide Granules Prepared by Spray-Drying Method

• Published in: Resources (Basel) 2024-03, Vol.13 (3), p.40
• Main Authors: Kurmysheva, Alexandra Yu, Kuznetsova, Ekaterina, Vedenyapina, Marina D., Podrabinnik, Pavel, Pinargote, Nestor Washington Solís, Smirnov, Anton, Grigoriev, Sergey N.
• Format: Article
• Language: English
• Subjects: 2,4-D; 2,4-D adsorption; Adsorbents; Adsorption; alumina adsorbent; Aluminum; Aluminum oxide; Ambient temperature; Aqueous solutions; Chemisorption; Dichlorophenoxyacetic acid; Drying; Fourier transforms; Granular materials; Graphene; graphene oxide; herbicide adsorption; Herbicides; Infrared spectroscopy; Monolayers; Pollutants; Polyvinyl alcohol; Process parameters; Raman spectroscopy; Scanning electron microscopy; Spectrum analysis; spray dry; Spray drying
• ISSN: 2079-9276; 2079-9276
• DOI: 10.3390/resources13030040

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.