Degradation of Organophosphorus Pesticides in Water during UV/H2O2 Treatment: Role of Sulphate and Bicarbonate Ions

Fadaei, Abdolmajid. and Dehghani, Mohammad hadi. and Mahvi, Amir Hossein. and Nasseri, S. and Rastkari, Noushin. and Shayeghi, M. (2012) Degradation of Organophosphorus Pesticides in Water during UV/H2O2 Treatment: Role of Sulphate and Bicarbonate Ions. Journal of Chemistry, 9 (4).

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Abstract

Abstract: The photodegradation of two organophosphorus pesticides, malathian and diazinon, by sulfate radicals and bicarbonate radicals in aqueous solution were studied. The effect of the operational parameters such as pH, salt concentration, water type, H2O2 concentration and initial concentration of pesticides was studied. Gas chromatography mass spectroscopy (GC-MS) was used for analyses of pesticides. When salt effect was studied, it was found that sodium bicarbonate was the most powerful inhibitor used, while sodium sulfate was the weakest one. The highest degradation in UV/H2O2 process for malathion was found in alkaline condition and for diazinon in acidic condition. The photodegradation in all waters used in this work exhibited first order kinetics. Photodegradation rate in distilled water was higher than real water. The degradation of pesticides increased with increasing of H2O2 concentration.

Item Type: Article
Uncontrolled Keywords: Advanced oxidation process; Bicarbonate; Hydrogen peroxide; Sulphate; Ultraviolet light.
Subjects: WA Public Health > Public Health Education WA.18 > WA 30 Social, Economic, and Environmental factor in public health
WA Public Health > WA 30 Social, Economic, and Environmental factor in public health
Divisions: Faculty of Health > Department of Environmental Health
Depositing User: zahra bagheri .
Date Deposited: 12 Dec 2017 08:20
Last Modified: 30 May 2018 10:06
URI: http://eprints.skums.ac.ir/id/eprint/6593

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