Ileri, Burcu2025-01-272025-01-2720221226-10252005-968Xhttps://doi.org/10.4491/eer.2020.287https://hdl.handle.net/20.500.12428/23139In this study, the removal of acid violet 7 (AV7) and basic violet 10 (BV10) synthetic dyes was investigated using fly ash alone, ultrasound (40 kHz) alone, and combined ultrasound/fly ash with various experimental parameters such as fly ash dose, contact time, and initial concentration of dye. The adsorption capacity of the ultrasound/fly ash process increased from 5.10 to 7.43 mg g(-1) for AV7, and increased from 5.16 to 7.51 mg g(-1) for BV10 compared with using fly ash alone. The sono-assisted adsorption process was successful in improving the dye uptake capacity with cavitation bubbles and acoustic waves, and thus AV7 and BV10 were removed with a shorter contact time and lower fly ash dose. Obtained regeneration and reuse experiment results showed that the fly ash could be reused for four consecutive cycles of the sono-assisted adsorption process, while fly ash could be reused for two consecutive cycles of the adsorption process. The adsorption kinetics for AV7 and BV10 onto fly ash fitted Lagergren's first-order adsorption kinetic model well. The Langmuir isotherm best described the adsorption with fly ash alone and ultrasound/fly ash process for AV7 and BV10.eninfo:eu-repo/semantics/openAccessAcid violet 7Basic violet 10Fly ashRegenerationReusabilitySono-assisted adsorptionArticle27110.4491/eer.2020.287Q2WOS:0007484759000042-s2.0-85120737705Q1