UTILIZAÇÃO DE ARGILAS ORGANOFÍLICAS PARA SORÇÃO DE FÁRMACOS EM ÁGUAS CONTAMINADAS: UMA PERSPECTIVA TEÓRICA E REVISÃO DE LITERATURA
UTILIZAÇÃO DE ARGILAS ORGANOFÍLICAS PARA SORÇÃO DE FÁRMACOS EM ÁGUAS CONTAMINADAS: UMA PERSPECTIVA TEÓRICA E REVISÃO DE LITERATURA
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DOI: https://doi.org/10.22533/at.ed.5702429016
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Palavras-chave: contaminantes emergentes; tratamento de água; bentonita; surfactantes catiônicos; organofilização
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Keywords: emerging contaminants; water treatment; bentonite; cationic surfactants; organophilization
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Abstract: The presence of pharmaceuticals in water bodies has emerged as a topic of growing concern recently. Several countries have recognized the need to monitor and regulate pharmaceutical products as Emerging Contaminants (ECs). Removing these contaminants from water is a technical challenge. Organoclays can be used as adsorbents in fixed bed adsorption columns to treat wastewater contaminated with pharmaceuticals. Another potential application of organoclays is as reactive materials for Permeable Reactive Barriers (PRB), for in situ treatment of contaminated groundwater. In this study, a comprehensive literature review was carried out regarding the application of organoclays in the sorption of drugs belonging to different therapeutic classes, focusing on the theoretical aspects and main concepts of this topic. To this end, two international databases were consulted: Web of Science and Scopus. The main organic modifiers, as well as the main properties of organophilic clays, were discussed. Factors that influence adsorption, such as pH, ionic strength, surface area and the presence of other contaminants, in addition to the main interaction mechanisms between these materials and drugs, were elucidated. Cationic surfactants were the most used organic modifiers, and diclofenac stood out as the most studied drug. Hydrophobic partition proved to be the dominant interaction mechanism in many systems. In general, research on this topic is recent and shows that organophilic clays can be a promising alternative adsorbent for removing pharmaceutical pollutants from contaminated water during remediation processes.
- Rayanne Macêdo Aranha Viegas
- Gabriela Paupitz Mendes
- Lélia Cristina da Rocha Soares
- Edson Cavalcanti da Silva Filho
- Josy Anteveli Osajima Furtini
- Osvaldo Chiavone Filho