Browsing by Author "Marques, David"
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- Activated Carbon Produced from Tanning Industry Residues Used to Remove Carbamazepine from WastewaterPublication . Marques, David; Freitas, Maria Madalena; Silva, P. C.According to UNESCO, emerging pollutants are posing a threat to ecosystems and human health. These compounds can be either synthetic or natural chemicals or microorganisms, that are not usually regulated, and can be found in hospital wastewater, even after conventional treatment processes. Carbamazepine is a mood stabilizing drug and an anticonvulsant. Due to its persistence, carbamazepine is one of the most frequently detected pharmaceuticals in wastewater. Though there are many methods to remove such pollutants, adsorption is one of the most effective treatments. To remove carbamazepine from solution, an activated carbon prepared from leather residues and a commercial activated carbon were used as adsorbents. The adsorption tests show that the leather residue derived activated carbons have higher specific surface area (>1500 m’/g) and higher adsorption capacity (q > 300 mgcnz/g) for carbamazepine when compared to commercial activated carbon (992 m’/g and q < 180 mgcaz/g, respectively).
- Ciprofloxacin and carbamazepine adsorption on activated carbons produced from leather residuesPublication . Marques, David; Mota, Salomé; Freitas, Maria Madalena; Silva, Paula CristinaCiprofloxacin and carbamazepine adsorption was studied using an activated carbon produced from leather residues (wet white shavings) and a commercially available activated carbon (Norit ROW 0.8) and the effect of pH level was studied. The activated carbon produced from wet white shavings showed better results due to its higher specific surface area, confirming that leather residues are a viable precursor for the preparation of activated carbons for the adsorption of these chemicals. The effect of pH on the AC adsorption capacity was not significant in the case of carbamazepine, however lower pH led to higher adsorption capacities for ciprofloxacin.