Efficient and reusable activated carbon from aframomum angustifolium fruits’ shells for removal of ceftriaxone from aqueous solution: adsorption isotherms, kinetics, and thermodynamics studies
| dc.contributor.author | Baraka Alfaksad Kasazi | |
| dc.contributor.author | Alinanuswe Joel Mwakalesi | |
| dc.contributor.author | Emmy Solomon Lema | |
| dc.date.accessioned | 2026-07-06T14:32:16Z | |
| dc.date.available | 2026-07-06T14:32:16Z | |
| dc.date.issued | 2025-11 | |
| dc.description | Journal Article | |
| dc.description.abstract | The accumulation of ceftriaxone antibiotics in aquatic systems is a growing global concern due to their potential risks to human and ecological health. The current study investigates the synthesis, characterization, and application of activated carbon (AC-FPAA-H3PO4) made from the shells of Aframomum angustifolium fruits. AC- FPAA-H3PO4 was synthesized using chemical activation (H3PO4, 4 M) followed by pyrolysis at 600 °C for 1 h and characterized using BET, FTIR, and SEM-EDX. AC-FPAA-H3PO4 exhibited a surface area of 1895.6 m2/g, which allowed for its reuse in 5 consecutive cycles without requiring active site regeneration. The optimal removal efficiency (97.8%) was achieved at pH 2, 298.15 K, 100 rpm, 20 g/L adsorbent dosage, and 200 mg/L ceftriaxone concentration. The adsorption process was described by Langmuir (R2 = 0.9862) and Freundlich (R2 = 0.9833) isotherms, and the kinetics were fitted to the pseudo-second- order model. The adsorption was spontaneous (ΔG = −6.80 kJ/mol) and exothermic (ΔH = −4.43 kJ/mol), with increased randomness at the solid-solution interface (ΔS = 7.69 J/mol K). The adsorbent demonstrated high efficiency in removing ceftriaxone from real water samples, including river water (99.36%) and well water (96.92%). The findings suggest AC-FPAA-H3PO4 is a promising adsorbent for removing ceftriaxone from an aqueous environment. | |
| dc.identifier.uri | https://www.suaire.sua.ac.tz/handle/20.500.14820/7680 | |
| dc.language.iso | en | |
| dc.publisher | Indonesian Journal of Chemistry | |
| dc.subject | Aframomum angustifolium | |
| dc.subject | activated carbon | |
| dc.subject | biowaste | |
| dc.subject | ceftriaxone | |
| dc.title | Efficient and reusable activated carbon from aframomum angustifolium fruits’ shells for removal of ceftriaxone from aqueous solution: adsorption isotherms, kinetics, and thermodynamics studies | |
| dc.type | Article |