Activated Carbons Derived from Brewing Cereal Residues and Pineapple Peelings for Removal of Acid Orange 7 (AO7) Dye

Molecules, Journal Year: 2025, Volume and Issue: 30(4), P. 881 - 881

Published: Feb. 14, 2025

The tremendous increase in agro-industrial waste poses major environmental problems and highlights the need for innovative, sustainable solutions. One promising solution would be converting these organic wastes, such as unvalued pineapple peels (ANA) brewer's grains (ECB), into activated carbons to meet impending challenge of wastewater treatment. In particular, Acid Orange 7 (AO7) is one most widely used synthetic dyes, a significant portion which ends up water, posing health with limiting decentralized cost-effective To address two challenges, we investigated best conditions wastes alternative (named CA-ANA CA-ECB) AO7 dye removal under representative adsorption conditions. Extensive characterization (SEM, EDX, XRD, BET) revealed an amorphous, mesoporous structure specific surface areas 1150-1630 m2 g-1, outperforming majority other biomass-derived reported removal. Adsorption followed pseudo-second-order kinetics Langmuir isotherm, record efficiencies 90-99% concentrations 25-35 mg L-1 batch reactor, driving forces being electrostatic attraction, π-π interactions, hydrogen bonding. These results undoubtedly highlight potential current waste-derived solutions efficient

Language: Английский

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Enhanced CO2 Capture Potential of Chitosan-Based Composite Beads by Adding Activated Carbon from Coffee Grounds and Crosslinking with Epichlorohydrin

International Journal of Molecular Sciences, Journal Year: 2024, Volume and Issue: 25(16), P. 8916 - 8916

Published: Aug. 16, 2024

Carbon dioxide (CO2) capture has been identified as a potential technology for reducing the anthropic emissions of greenhouse gases, particularly in post-combustion processes. The development adsorbents carbon and storage is expanding at rapid rate. This article presents novel sustainable synthesis method production chitosan/activated CO2 adsorbents. Chitosan biopolymer that naturally abundant contains amino groups (–NH2), which are required selective adsorption CO2. Spent coffee grounds have considered feedstock activated through carbonization chemical activation. ground composite microspheres were created using emulsion cross-linking with epichlorohydrin. effects amount chitosan (15, 20, 25 g), (10, 30, 40%w/w), epichlorohydrin (2, 3, 4, 5, 6, 7 8 g) examined. beads superior to neat beads. adsorbed synthesized materials standard temperature pressure improved by increasing quantity These findings suggest bead be applied separation applications.

Language: Английский

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Composite Materials Based on Spent Coffee Grounds and Paper Pulp

Journal of Composites Science, Journal Year: 2024, Volume and Issue: 8(12), P. 491 - 491

Published: Nov. 24, 2024

The need for biodegradable and environmentally friendly materials is increasing due to resource shortages rising levels of environmental pollution. Agro-food waste, which includes coffee grounds, great interest in the production composite its low cost, density, easy availability, non-abrasive nature, specific properties such as reduced wear on machinery used, absence residues toxic products, characteristics. developed that include grounds exhibit good This field evolving requires further improvements, but, at this moment, it can be stated are not just waste but transformed into a highly efficient material applicable various domains. In study, were prepared using paper pulp matrix, filler material, water binding agent. obtained evaluated through thermal analysis, SEM, EDX, ATR-FTIR, rheological behavior analysis. created from proved effective use seedling pots. pots study produced friendly, stability, have stability over time, resistance deformation.

Language: Английский

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Numerical Analysis of the Influence of Air Flow Rate on the Development of the Porous Structure of Activated Carbons Prepared from Macadamia Nut Shells

Materials, Journal Year: 2024, Volume and Issue: 17(24), P. 6264 - 6264

Published: Dec. 21, 2024

This paper presents the numerical analysis of influence air flow rate on porous structure development activated carbons prepared from macadamia nut shells. The analyses based nitrogen and carbon dioxide isotherms were carried out by new clustering-based adsorption method. Therefore, it was possible to evaluate with high precision reliability. In particular, results obtained showed that at an 700 cm3/min has highest capacity respect this adsorbate, but surface heterogeneity. On other hand, towards is sample 500 cm3/min. conducted have shown too causes a violent oxidation reaction, leading uncontrolled burning carbonaceous substance destruction smallest micropores.

Language: Английский

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