Activated carbons were synthesized from walnut shells by pyrolysis and chemical activation, and their structural and adsorption properties were studied. BET analysis showed that the surface area increased from 285.4 m²/g for WBC to 842.7, 915.2, and 1248.9 m²/g for PAC, ZAC, and KAC, respectively. XRD confirmed the predominantly amorphous structure of all samples, while nitrogen adsorption isotherms revealed Type I behavior for WBC and Type IV behavior for the activated samples. KAC exhibited the highest adsorption performance, with maximum capacities of 421.7 mg/g for methylene blue at pH 10 and 152.4 mg/g for Cu(II) ions at 35°C and 300 mg/L. The results indicate that KOH-activated carbon is a promising adsorbent for removing organic dyes and heavy metal ions from water.
| Mualliflar | D. Ergasheva, A. Mukhamadiyev, N. Mukhamadiyev, J. Uzokov |
|---|---|
| Jurnal | Samarqand davlat universiteti ilmiy tadqiqotlar axborotnomasi |
| Nashr sanasi | 2026-07-01 |
| Jild | 2 |
| Son | 3 |
| Betlar | 151-161 |
| DOI | 10.59251/2181-3973.2025.v1.138.1.3969 |
DOI: 10.59251/2181-3973.2025.v1.138.1.3969 · Maqolaning asl sahifasi
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