| Title | Development of bifunctional biochar/iron oxide composites for tetracycline removal from synthetic wastewater |
|---|---|
| ID_Doc | 13070 |
| Authors | Fuentes, PA; Pailañir, MK; Mella, SR; Quijon, MEG; Bernardi, TM; Lemus, MC |
| Title | Development of bifunctional biochar/iron oxide composites for tetracycline removal from synthetic wastewater |
| Year | 2024 |
| Published | |
| Abstract | In this work, we studied the effect of physicochemical properties of synthesized biochar/iron oxide composites on tetracycline (TC) removal from an aqueous system. The TC removal involved adsorption and degradation using Fenton-like and Photo-Fenton-like reactions. The results showed that the adsorption capacity of synthesized materials inversely varied with the pyrolysis temperature, achieving removal percentages of 72 %, 65 %, and 56 % for materials developed at pyrolysis temperatures of 400 degrees C, 500 degrees C, and 600 degrees C, respectively. Regarding the Fenton-like and Photo-Fenton-like processes, BC-500-m exhibited the best catalytic performance attributed to its structural conformation and phase composition of iron oxide. This enabled the removal of 84 % of tetracycline. BC-500-m also showed a low reaction rate, resulting in a 53 % removal of TC through the Photo- Fenton process. However, a high degradation capacity and potentially mineralizable by-products into CO2 2 and H2O 2 O suggest that photo assistance establishes a cleaner and more ecosystem-friendly reaction mechanism. The reuse capacity decreased from 84 % to 12.5 % after five cycles, indicating a reduced availability of active sites to remove TC due to the possible generation of complexes between Fe+2 +2 and the TC. It is a significant advancement that through the thermochemical valorization of lignocellulosic resources such as brewer's spent grains (BSG), it is possible to establish sustainable and ecosystem-friendly bifunctional removal mechanisms capable of mediating the remediation of water with the presence of pharmaceuticals through a circular economy. |
| https://doi.org/10.1016/j.jwpe.2024.105509 |
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