Effect of Ultrasonic Frequency on Chlorpyrifos Degradation in Sonolytic Ozonolysis

Abstract:

The degradation of chlorpyrifos is investigated with the treatments of sonolysis, ozonolysis, and sonolytic ozonolysis at various frequencies. Results show that there exists frequency effect in sonolytic ozonolysis. In sonolytic ozonolysis, the maximum degradation rate is obtained at 495 kHz, and the degradation kinetics is fitted to the first-order kinetics model well. However, the most significant synergistic effect between ultrasonic and ozone is at 124 kHz. The kinetics parameters indicate that chlorpyrifos is much more labile to ultrasonic at 495 kHz, while ozone is much more soluble at 124 kHz. The hydrolysis and oxidation are deduced to contribute to the degradation reaction and the degradation pathway for chlorpyrifos degradation is proposed.

• Periodical: Applied Mechanics and Materials (Volumes 587-589)
• Pages: 578-581
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.587-589.578
• Online since: July 2014
• Authors: Jin Zhu*, Chang Ping Zhu, Bin Wang, Run Hang Gong, Qing Gong Ren, Qing Bang Han, Zhen Bing He, Bing Yan Chen, Ying Gao, Ming Lei Shan
• Keywords: Degradation Pathways, Frequency Effect, Sonolytic Ozonolysis, Synergistic Effect

References

[1] Li, HB; Li, J; Xu, Q; Hu, XY. Poly(3-hexylthiophene)/TiO2 Nanoparticle-Functionalized Electrodes for Visible Light and Low Potential Photoelectrochemical Sensing of Organophosphorus Pesticide Chlopyrifos, Analytical Chemistry. 83(2011) 9681-9686.

DOI: 10.1021/ac202679g

[2] Peter B. Key, Elizabeth Simonik, Nicol Kish, Katy W. Differences in response of two model estuarine crustaceans after lethal and sublethal exposures to chlorpyrifos, Environmental Science and Health. 48(2013) 967-973.

DOI: 10.1080/03601234.2013.816603

[3] Danette D. Chlorpyrifos Preliminary Human Health Risk Assessment; U.S. Environmental Protection Agency, Office of Chemical Safety And Pollution Prevention: Washington, DC, 20460; pp.2-159.

[4] N.H. Ince, G. Tezcanli, R.K. Belen, I.G. Apikyan, Ultrasonic as a catalyzer of aqueous reaction systems: the state of the art and environmental applications, Appl. Catal. B: Environ. 29 (2001) 167–176.

DOI: 10.1016/s0926-3373(00)00224-1

[5] Z.Q. He, R.Y. Zhu, X. Xu, S. Song, J.M. Chen. Ozonation combined with sonolysis for degradation and detoxification of m-nitrotoluene in aqueous solution, Ind. Eng. Chem. Res. 48 (2009) 5578–5583.

DOI: 10.1021/ie801566z

[6] Ricardo A. Torres, Christian Pe´trier, Evelyne Combet, Marion Carrier, Cesar Pulgarin. Ultrasonic cavitation applied to the treatment of bisphenol A. Effect of sonochemical parameters and analysis of BPA by-products[J]. Ultrasonics Sonochemistry 15 (2008).

DOI: 10.1016/j.ultsonch.2007.07.003

[7] ouise Milne, Isobel Stewart, David H. Bremner. Comparison of hydroxyl radical formation in aqueous solutions at different ultrasonic frequencies and powers using the salicylic acid dosimeter. Sonochemistry 20 (2013) 984–989.

DOI: 10.1016/j.ultsonch.2012.10.020

[8] Slimane Merouani, Oualid Hamdaoui, Yacine Rezgui, Miloud Guemini. Effects of ultrasound frequency and acoustic amplitude on the size of sonochemically active bubbles – Theoretical study[J]. Ultrasonics Sonochemistry 20 (2013) 815–819.

DOI: 10.1016/j.ultsonch.2012.10.015

[9] Zhenglong Xiong, Xiang Cheng, Dezhi Sun. Pretreatment of heterocyclic pesticide wastewater using ultrasonic/ozone combined process[J]. Journal of Environmental Sciences. 23(2011) 725–730.

DOI: 10.1016/s1001-0742(10)60465-2

[10] Duirk, S.E., Tarr, J.C., Collette, T.W. Chlorpyrifos transformation by aqueous chlorine in the presence of bromide and natural organic matter. J. Agric. Food Chem. 56(2008) 1328–1335.

DOI: 10.1021/jf072468s