Article ; Online: Exploring the adsorption potential of Na2SiO3-activated porous carbon materials from waste bamboo biomass for ciprofloxacin rapid removal in wastewater
Environmental Technology & Innovation. 2023 Nov., v. 32 p.103318-
2023
Abstract: Effective utilization of biomass waste has become a key focus in achieving a sustainable future, considering the substantial amount of waste generated globally. This study investigates the characterization and evaluation of Na₂SiO₃-activated carbon ... ...
Abstract | Effective utilization of biomass waste has become a key focus in achieving a sustainable future, considering the substantial amount of waste generated globally. This study investigates the characterization and evaluation of Na₂SiO₃-activated carbon derived from moso bamboo at various temperatures (500–900 °C) and residence time periods (30, 90, and 120 mins at 900 °C) for ciprofloxacin removal in aqueous solutions at initial concentrations of 50–250 mg/L. The activated carbons were characterized using N2 adsorption isotherms, revealing a combined Type I and Type IV behavior. The specific surface area (SBET) and total pore volume increased with increasing activation temperature, ranging from 157.3 m²/g to 381.6 m²/g. Regarding residence time, the SBET followed the sequence: Na₂SiO₃-60 (381.6 m²/g) > Na₂SiO₃-90 (333.8 m²/g) > Na2SiO3-120 (323.6 m²/g) > Na₂SiO₃-30 (312.7 m²/g). XRD analysis indicated a distinct peak at 23°, corresponding to the (002) plane of amorphous carbon, while Raman spectroscopy confirmed the presence of the D band and G band, indicating an amorphous carbon structure (ID/IG > 1). The adsorption performance of ciprofloxacin (CIP) on the activated carbons was evaluated at 298 K. The highest CIP removal rate of 89.2% was achieved within one hour using Na₂SiO₃-900, followed by Na₂SiO₃-800, Na₂SiO₃-700, Na Na₂SiO₃-600, and Na₂SiO₃-500, consistent with the SBET trend. The Langmuir adsorption isotherm model provided the best fit for analyzing the adsorption process, indicating predominantly monolayer adsorption, while the Freundlich model was suitable for ACs with different residence times. The maximum adsorption capacity of CIP was recorded for Na₂SiO₃-30 AC (17.12 mg/g). In conclusion, the synthesized activated carbons show promising potential as adsorbents for ciprofloxacin removal from water. |
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Keywords | Phyllostachys edulis ; Raman spectroscopy ; adsorbents ; adsorption ; bamboos ; biomass ; carbon ; ciprofloxacin ; environmental technology ; models ; sorption isotherms ; surface area ; temperature ; wastewater ; Bamboo-based activated carbon ; Waste |
Language | English |
Dates of publication | 2023-11 |
Publishing place | Elsevier B.V. |
Document type | Article ; Online |
ISSN | 2352-1864 |
DOI | 10.1016/j.eti.2023.103318 |
Database | NAL-Catalogue (AGRICOLA) |
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