AI Article Synopsis
- * A specific mixture (15 wt% WS/CeO) was tested, and results showed that increasing the dosage improved degradation rates, while water hardness negatively impacted the process.
- * The research found that higher ultrasound power and increased temperature improved degradation efficiency, with the lowest activation energy calculated at 10.81 kJ/mol, and only a slight decrease in catalytic activity after multiple uses.
Article Abstract
The main aim of the present investigation was the intercalation of WS nanosheets in the structure of ceria (CeO) to be used for the efficient catalytic destruction of tylosin (TYL) as a macrolide antibiotic in water. As-synthesized heterostructured catalyst was placed in a sono-reactor (40 kHz and 300 W) in order to degrade TYL through the sonocatalysis. 15 wt% WS/CeO was chosen for performing the systematic experiments. Decreasing the concentration of TYL, along with increasing the WS/CeO dosage led to reduced degradation efficiency. The water hardness was demonstrated to be a suppressive agent on the sonocatalysis of the target pollutant. As-generated holes, OH, and also O were responsible for the degradation of TYL. Increasing the ultrasound power and operating temperature enhanced the degradation efficiency. The degradation rate boosted up when the temperature was raised from 10 °C (0.0107 1/min) to 40 °C (0.0165 1/min). Moreover, the lowest activation energy (E) for sonocatalytic degradation was obtained as 10.81 kJ/mol. The sonocatalytic activity of WS/CeO in the sono-reactor encountered insignificant change within five consecutive operational runs (~15% reduction). The mechanism and pathways of the sonocatalytic decomposition of TYL are also proposed.
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| http://dx.doi.org/10.1016/j.ultsonch.2020.105114 | DOI Listing |
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