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Production of low-cost adsorbents with tunable surface chemistry by conjunction...
Roman, Silvia; Valente Nabais, Joao; Ledesma, Beatriz; Gonzalez, Juan; Laginhas, Carlos; Titirici, MariaWe report a new methodology to produce activated carbons from biomass-derived hydrothermal carbons using air and carbon dioxide. The activation step is crucial to develop porosity in the hydrothermal carbons. Additionally different surface functionalities are also introduced on the surface of the final materials. Our method based on initial hydrothermal carbonization of lignocellulosic biomass (walnut shell, su...
HYDROTHERMAL CARBONIZATION AS AN EFFECTIVE WAY OF DENSIFYING THE ENERGY CONTENT...
Valente Nabais, Joao; Roman, Silvia; Laginhas, Carlos; Ledesma, Beatriz; Gonzalez, JuanHydrothermal carbonization processes were studied under different conditions using two different biomass materials: walnut shell and sunflower stem. Coalification under mild conditions was promoted with the aim of increasing the calorific value of the solid hydrochar. Hydrocarbonization processes brought up an increase on the heating value of the materials up to 28.9 and 29.3 MJ kg−1, for sunflower stem and wal...
Removal of amitriptyline from aqueous media using activated carbons
Valente Nabais, Joao; Ledesma, Beatriz; Laginhas, CarlosThis paper reports the removal of amitriptyline, a widely used tricyclic anti-depressant, from aqueous solutions by six activated carbons produced from cork, coffee endocarp and eucalyptus pulp. The results of this study showed that samples from cork and eucalyptus pulp, activated at 800 °C, exhibited the highest adsorption capacity of 120 mg/g and 110 mg/g, respectively. Samples produced from coffee endocarp s...
Removal of amitriptyline from simulated gastric and intestinal fluids using act...
Valente Nabais, João M.; Ledesma, Beatriz; Laginhas, CarlosIn this work, the adsorption behavior of a tricyclic antidepressant, amitriptyline hydrochloride, onto several activated carbons (ACs) is reported. The adsorption was done using in vitro simulated gastric and intestinal fluid at 37◦C to test the performance of the carbons as treatment in overdose cases. The tested materials were one commercial AC (carbomix) and two ACs produced in our laboratory. The highest ad...
Influence of hydrocarbonization conditions on the porosity of derived carbon di...
Roman, Silvia; Ledesma, Beatriz; Nabais, Joao; Laginhas, CarlosInfluence of hydrocarbonization conditions on the porosity of derived carbon dioxide activated carbons
Uptake of amitrypline onto activated carbons in aqueous and in vitro conditions.
Ledesma, Beatriz; Nabais, Joao; Laginhas, CarlosUptake of amitrypline onto activated carbons in aqueous and in vitro conditions.
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