Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/29269
Title: Upcycling spent brewery grains through the production of carbon adsorbents: application to the removal of carbamazepine from water
Author: Sousa, Andreia F. C.
Gil, María Victoria
Calisto, Vânia
Keywords: Brewery wastes
Pyrolysis
Chemical activation
Activated carbon
Pharmaceuticals
Wastewater treatment
Issue Date: Oct-2020
Publisher: Springer
Abstract: Spent brewery grains, a by-product of the brewing process, were used as precursor of biochars and activated carbons to be applied to the removal of pharmaceuticals from water. Biochars were obtained by pyrolysis of the raw materials, while activated carbons were produced by adding a previous chemical activation step. The influence of using different precursors (from distinct fermentation processes), activating agents (potassium hydroxide, sodium hydroxide, and phosphoric acid), pyrolysis temperatures, and residence times was assessed. The adsorbents were physicochemically characterized and applied to the removal of the antiepileptic carbamazepine from water. Potassium hydroxide activation produced the materials with the most promising properties and adsorptive removals, with specific surface areas up to 1120 m2 g-1 and maximum adsorption capacities up to 190 ± 27 mg g-1 in ultrapure water. The adsorption capacity suffered a reduction of < 70% in wastewater, allowing to evaluate the impact of realistic matrices on the efficiency of the materials.
Peer review: yes
URI: http://hdl.handle.net/10773/29269
DOI: 10.1007/s11356-020-09543-0
ISSN: 0944-1344
Publisher Version: https://link.springer.com/article/10.1007/s11356-020-09543-0
Appears in Collections:CESAM - Artigos
DQ - Artigos

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