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Removal of metformin from aquatic matrices using cork-based adsorbents
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Orientador(es)
Resumo(s)
Anthropogenic activities associated with industrial development, urbanization, and population growth have significantly contributed to the presence of various pollutants in aquatic environments. Among these contaminants, emerging micropollutants have raised considerable concern. The detection and quantification of these substances require advanced analytical techniques due to their occurrence at extremely low concentrations (μg/L to ng/L). These pollutants pose substantial environmental and human health risks, particularly pharmaceuticals. Metformin, a pharmaceutical prescribed for the treatment of type 2 diabetes, is increasingly detected in aquatic environments due to its incomplete metabolism and widespread prescription. Some studies indicate that metformin can stimulate the expression of genes associated with endocrine hormone
pathways, while its chlorinated byproducts in drinking water exhibit toxic effects on aquatic ecosystems. Several treatment strategies have been investigated for removing pharmaceuticals from wastewater, with adsorption emerging as a practical approach. Activated carbons, particularly those derived from renewable biomass such as cork, have gained attention due to their high efficiency and cost-effectiveness in the removal of organic pollutants from wastewater. The present study investigates the efficiency of metformin removal from aqueous matrices using cork- based adsorbent materials. The proposed methodology encompasses the production of adsorbents via physical and chemical activation. The physical activation involved the carbonization of cork at 550°C for 1 hour. In contrast, the chemical activation comprised a pre-carbonization step at 550°C for 1 hour and impregnation with KOH at a 1:5 ratio (biochar: KOH). The impregnated material was then carbonized at 750°C for 1 hour. The characterization of the adsorbents includes calculation of carbonization yield, determination of the point of zero charge (pHpzc), analysis of acidic and basic surface sites, FTIR, TGA and BET. Kinetic and equilibrium adsorption studies will be carried out later. For this purpose, a metformin quantification method using HPLC was developed.
Descrição
Palavras-chave
Metformin Adsorbents
Contexto Educativo
Citação
Morizaki, Gabrielle Tokawa; Gomes, Maria Carolina Sérgi; Queiroz, Ana; Brito, Paulo; Ribeiro, António E. (2025). Removal of metformin from aquatic matrices using cork-based adsorbents. In 9PYCheM – 9th Portuguese Young Chemists Meeting. Faro. ISBN 978-989-8124-46-3
Editora
Sociedade Portuguesa de Química