![Investigation on the sonocatalytic degradation of parathion in the presence of nanometer rutile titanium dioxide (TiO"2) catalyst [An article from: Journal of Hazardous Materials]](https://www.ebooknetworking.net/books/B00/0PA/bigB000PAUAN2.jpg)
Investigation on the sonocatalytic degradation of parathion in the presence of nanometer rutile titanium dioxide (TiO"2) catalyst [An article from: Journal of Hazardous Materials]
Description
This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
The nanometer rutile titanium dioxide (TiO"2) powder was adopted to act as the sonocatalyst after treatment of high-temperature activation and the ultrasound of low power was used as an irradiation source to induce heat-treated TiO"2 powder performing sonocatalytic degradation of parathion. Although there are many factors influencing sonocatalytic degradation of parathion, the experimental results demonstrate that the optimal degradation condition of parathion can be obtained when the experimental conditions such as initial concentration of 50mg/L parathion, addition amount of 1000mg/L nanometer rutile TiO"2, ultrasonic of 30-50kHz frequency and 50W output power, acidity of pH 10.0 and temperature of 20^oC are adopted. The degradation ratio of parathion surpassed 90% within 120min ultrasonic irradiation in these optimal experiment conditions. The total degradation process of parathion has been monitored by UV-vis spectra and ion chromatography. At last, the parathions in aqueous solution are completely degraded and become some simple inorganic ions such as NO"3^-, PO"4^3^-, SO"4^2^-, etc. In addition, the sonocatalytic activities of reused TiO"2 catalysts were also studied and found to decline gradually along with the reused times. In this paper, the research on sonocatalytic degradation kinetics was also been performed and found to follow pseudo first-order reaction. All experiments indicated that the sonocatalytic method in the presence of nanometer rutile TiO"2 powder was an advisable choice for the treatments of non- or low-transparent organic wastewaters in future.
Description:
The nanometer rutile titanium dioxide (TiO"2) powder was adopted to act as the sonocatalyst after treatment of high-temperature activation and the ultrasound of low power was used as an irradiation source to induce heat-treated TiO"2 powder performing sonocatalytic degradation of parathion. Although there are many factors influencing sonocatalytic degradation of parathion, the experimental results demonstrate that the optimal degradation condition of parathion can be obtained when the experimental conditions such as initial concentration of 50mg/L parathion, addition amount of 1000mg/L nanometer rutile TiO"2, ultrasonic of 30-50kHz frequency and 50W output power, acidity of pH 10.0 and temperature of 20^oC are adopted. The degradation ratio of parathion surpassed 90% within 120min ultrasonic irradiation in these optimal experiment conditions. The total degradation process of parathion has been monitored by UV-vis spectra and ion chromatography. At last, the parathions in aqueous solution are completely degraded and become some simple inorganic ions such as NO"3^-, PO"4^3^-, SO"4^2^-, etc. In addition, the sonocatalytic activities of reused TiO"2 catalysts were also studied and found to decline gradually along with the reused times. In this paper, the research on sonocatalytic degradation kinetics was also been performed and found to follow pseudo first-order reaction. All experiments indicated that the sonocatalytic method in the presence of nanometer rutile TiO"2 powder was an advisable choice for the treatments of non- or low-transparent organic wastewaters in future.
