Ethion residue removal
efficiency using individual and combined effects of ultrasonication (US),
ozonation (O3), ultrasonication and ozonation (US/O3) was
investigated. A 1 mg·L-1 standard ethion was subjected to an ultrasonic irradiation (3W input power)
device with different frequencies of 108, 400, 700, 1000 kHz, and to an ozone
with a concentration of 200 mg· mL-1 with various exposure times
(0, 15, 30, 45 and 60 minutes). Reduction of residual ethion was determined by
gas chromatography with flame photometric detection (GC-FPD). It was found that
1000 kHz ultrasonic irradiation for 60 minutes was the most effective treatment
for reducing ethion concentration. Additionally, ozone could reduce the
concentration of standard ethion after 60 minutes of exposure. Ultrasonic irradiation
in combination with ozone had a synergistic effect in reducing standard ethion
concentration, with the highest rate occurring within the first 15 minutes.
Ethion concentration was reduced to 75.43% after ultrasonic irradiation at 1000 kHz and ozone exposure for 60 minutes.
The effectiveness of the combined scheme for reducing of ethion residues
on tangerine was also determined by GC-FPD. The ethion residue on fresh
tangerines after ultrasonic irradiation and ozone washing was reduced by 73.03%
after 60 minutes. The present study demonstrates that ultrasonic irradiation
and ozone exposure could be used to reduce
ethion residues in treated tangerine in order to meet the Standards for
Pesticide Residue Limits.
Cite this paper
Whangchai, K. , Phiyanalinmat, S. , Uthaibutra, J. , Pengphol, S. and Nomura, N. (2013) The effects of ultrasonic irradiation in combination with ozone on the reduction of residual ethion of tangerine (Citrus reticulata
Blanco cv. Sai Nam Pung) fruit after harvest. Agricultural Sciences
, 7-11. doi: 10.4236/as.2013.45B002
 Davis, F. S. and Albrigo, L. G. (1994) Citrus. CAB Interntioal, Walling, Oxon, U.K., p.254.
 Wongkaew, L. (2009) Survey of the use of pesticides in tangerine in Chiang Mai province Thailand. Annual report of Department of Agriculture.
 Weavers, L.K., Ling, F.H. and Hoffmann, M.R. (1998) Aromatic compound degradation in water using a combination of sonolysis and ozonolysis. Environmental Science & Technolology,32, 2727-2733.
 Hoffmann, M.R, Hua, I. and Höchemer, R. (1996) Application of ultrasonic irradiation for the degradation of chemical contaminants in water. Ultra sonics Sonochemistry, 3, S163-S172.
 Wang, J., Pan, Z., Zhang, Z., Zhang, X., Wen, F., Ma, T., Jiang, Y., Wang, L., Xu, L. and Kang, P. (2006) Sonocatalytic degradation of methyl parathion in the cvpresence of nanometer and ordinary anatase titanium dioxide catalysts and comparison of their sonocatalytic abilities. Ultrasonics Sonochemistry, 13, 493-500.
 Song, W. and O’Shea, K.E. (2007) Ultrasonically induced degradation of 2-methylisoborneol and geosmin. Water Research, 41, 2672-2678.
 Whangchai, K., Uthaibutra, J., Phiyanalinmat , S., Pengphol, S. and Nomura,N. (2011) Effect of ozone treatment on the reduction of chlorpyrifos residues in fresh lychee fruits. Ozone Science and Engineering, 33, 232-236.
 Inan, F., Pala, M. and Doymaz, I.( 2007) Use of ozone in detoxification of aflatoxin B1
in red pepper. Journal of Stored Product Research, 43, 425-429.
 Wu, J., Luan, T., Lan, C., Lo, T. W.H. and Chan, G. Y. S. (2007) Removal of residual pesticides on vegetable using ozonated water. Food Control, 18, 466-472.
 Ethion.[Online].Available: http://toxipedia.org/display/toxi pedia/Ethion (January 19, 2011).
 Eaton, A.D., Clesceri, L.S., Rice, E.W., Greenberg, A. E. (2005) Standard Methods for the Examination of Water and Waste-Water 21th ed. Am. J. Public Health. Washington DC, USA.
 Fenoll, J., P., Hellín, C.M., Martínez, Miguel, M. and Flores, P. (2007) Multiresidue method for analysis of pesticides in pepper and tomato by gas chromatography with nitrogen–phosphorus detection. Food Chemistry, 105, 711-719. doi:10.1016/j.foodchem.2006.12.060
 Pengpol,S.,Uthaibutra,J., Arquero, O. A., Nomura,N. (2011) Reduction of residual Chlorpyrifos on harvested bird chillies (Capsicum frutescens) using ultrasonication and ozonation. Thai Journal of Agri cultural Science, 44, 182-187.
 Hart, E.J. and Henglein, A. (1985) Free radical and free atom reactions in the sonolysis of aqueous iodide and formate solutions. Journal of Physic Chemistry, 89, 4342-4347. doi:10.1021/j100266a038
 Yao, J-J., Gao, N-Y., Li, C. and Xu, B. (2010) Mechanism and kinetics of parathion degradation under ultrasonic irradiation. Journal of Hazardous Materials, 175, 138-145. doi:10.1016/j.jhazmat.2009.09.140
 Ku, Y., Chang, J.L., Shen, Y.S. and Lin, S.Y. (1998) Decomposition of diazinon in aqueous solution by ozonation. Water Research, 32, 1957-1963.
 Faust, S.D. and Gomma, H.M. (1972) Chemical hydrolysis of some organic phosphorus and carbamate pesticides in aquatic environment. Environmental Letters, 3, 171- 201. doi:10.1080/00139307209435465
 Wenrong, H. and Haiyan, P. (2002) Decomposed characteristic of azo dyes by ozonization with ultrasonic enhancement. E-Journal of Chinese Science Bulletin, 47, 986-989.