Percorrer por autor "Diáz de Tuesta, Jose Luis"
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- Removal of estrogens from water using activated carbon adsorbent materials prepared from olive stonesPublication . Milani, Eduardo C.; Menezes, Maraísa L.; Diáz de Tuesta, Jose Luis; Ribeiro, António E.; Brito, Paulo; Queiroz, AnaEstrogens belong to the class of water micropollutants named as endocrine disrupting chemicals and are considered persistent substances in the environment. Estrogens are a type of hormones that are continuously released to environment presenting several undesirable effects on aquatic species and human health even when present at very low concentrations (trace levels) . Additionally, it is known that traditional sewage and drinking water treatment plants are not able to remove or degrade these compounds and additional treatments are required. Activated carbons (ACs) are low-cost carbonaceous materials with a high surface area. ACs undergo an activation process in order to increase its adsorption performance. Activation can be performed by physical treatment, in which the organic material is thermal treated with an atmosphere of air, CO2, and water vapor, or also by applying some chemical treatments using generally, strong acids, chloride salts or strong bases. With this work, we present an extensive set of experimental results that shows the valorization of olive stones residues to prepare activated carbons to be used as adsorbent for the removal of estrone (E1), 17β-estradiol (E2) and 17α-ethinylestradiol (EE2) by adsorption from water.
- Valorization of oliviculture residues for the removal of estrogens from waterPublication . Milani, Eduardo C.; Menezes, Maraísa L.; Diáz de Tuesta, Jose Luis; Brito, Paulo; Queiroz, Ana; Ribeiro, António E.Estrogens belong to the class of water micropollutants named as endocrine disrupting chemicals and are considered persistent substances in the environment. Estrogens are a type of hormones that are continuously released into the environment presenting several undesirable effects on aquatic species and human health even when present at very low concentrations (trace levels) [1, 2]. It is also known that traditional sewage and drinking water treatment plants are not able to remove or degrade these compounds and additional treatments are required [3, 4]. Activated carbons (ACs) are low-cost carbonaceous materials with a high surface area. ACs undergo an activation process in order to increase its adsorption performance. Activation can be performed by physical treatment, in which the organic material is thermal treated with an atmosphere of air, CO2, and water vapor, or also by applying some chemical treatments using generally, strong acids, chloride salts or strong bases [5]. As carbon source for ACs preparation, many precursors have been tested, mainly biomass wastes (olive stones, rice husk, coconut shell, among others). According to the Instituto Nacional de Estatística (INE), in 2021, Portugal produced more than 1.3 million tons of olives and it is estimated that more than 500,000 tons of residues were generated per year [6]. Currently, there is an effort to produce bio-based adsorbents that can be used to remove efficiently a wide range of micropollutants from water [7].