Adsorption of atenolol on nanostructured clays: Experimental Design, and Kinetic Study

Adsorption of atenolol on nanostructured clays: Experimental Design, and Kinetic Study

• Autor
• Gabriel Santos da Rosa
• Co-autores
• Daniel Moro Druzian , Leandro Rodrigues Oviedo , Alencar Kolinski Machado , William Leonardo Da Silva
• Resumo

•  

  The quality and quantity of water resources are fundamental aspects of sustainable development, and it is necessary to combine efficient water treatment technologies capable of eliminating and removing persistent contaminants especially the atenolol (AtL). In this sense, the present work aims to synthesize and characterize zeolites by sol-gel and hydrothermal methods from the rice husk and residual sludge and to apply in the removal of the  AtL drug. In this sense, the adsorption was carried out in a batch system for 180 min, followed by initial AtL adsorption tests, and an experimental design. The characterizations confirmed the synthesis of zeolites with aluminosilicate phases (Metahalloysite (29.8 nm), Faujasite (14.2 nm), and Sodalite (17.5 nm)) and negative surface charge (-24.6, -26.4, and -18.8 mV). Moreover, the initial AtL adsorption tests indicated that sodalite (nSod) presented a higher removal of 82.5% of AtL compared to activated carbon of 42.8%. The experimental design using nSod indicated that variable adsorbent concentration and solution pH positively influenced the removal of AtL. The data from the kinetic studies demonstrated the formation of chemical bonds, where the pseudo-second-order model (q_e=28.68 g mg^-1 g^-1) best fitted the data. Therefore, it was possible to synthesize nanostructured zeolites of different phases with great potential for application in the removal of AtL.

• Palavras-chave
• Adsorption, Drugs, Nanomaterials, Organic pollutants.
• Área Temática
• Adsorção aplicada à Catálise