查看文章

The focus of this research is on the rapid ultrasound-assisted removal of Methylene blue (MB) and Auramine-O (AO) dyes from aqueous solutions using ZnS:Cu nanoparticles loaded on activated carbon (ZnS:Cu-NP-AC) as a low cost and environmental friendly adsorbent. The adsorbent was characterized by FE-SEM, FTIR and XRD. The effect of variables such as adsorbent dosage, sonication time, initial concentration of MB, and initial concentration of AO on the removal percentages of MB and AO dyes were simultaneously investigated by central composite design (CCD) under response surface methodology (RSM) while pH was optimized separately. It was shown that the adsorption of AO and MB follows the pseudo-second-order rate equation, while the Langmuir model explains equilibrium data. A small amount of the adsorbent was able to remove more than 99.5% of both dyes rapidly with high adsorption …