Detoxification of azinophos methyl using gamma radiation mediated advance oxidation process and investigation of degradation products by HPLC and GC-MS
-
Sadaf Sadiq Khan
and
Muhammad Riaz
Abstract
Gamma radiolytic degradation of azinophos-methyl was studied in water and methanol separately, using 60Co as a radiation source under varied experimental conditions. Solution of azinophos-methyl was prepared in pure methanol at concentration of 50 μg ml−1, irradiated at gamma dose of 1 to 7 kGy and high performance liquid chromatography (HPLC) coupled with diode array detector was used to monitor the extent of degradation along with numbers of degradation products. At dose of 7 kGy ≥ 99% of azinophos-methyl was degraded. The degradation occurred by interaction of CH3O. and H. radicals generated by the radiolysis of high purity methanol while in water by .OH radical. The degradation in water was increased by 30% than in methanol due the high oxidation potential of .OH while keeping the gamma ray dose constant at 3 kGy. The generated degradation products were identified using GC-MS and their possible transformation pathways are proposed. It is suggested that use of ionization radiations can be an effective and efficient tool for the removal of organophosphate pesticides in waste water.
©2014 Walter de Gruyter Berlin/Boston
Articles in the same Issue
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- Detoxification of azinophos methyl using gamma radiation mediated advance oxidation process and investigation of degradation products by HPLC and GC-MS
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Articles in the same Issue
- Frontmatter
- Excitation functions and yields for cyclotron production of radiorhenium via deuteron irradiation: natW(d,xn)181,182(A+B),183,184(m+g),186gRe nuclear reactions and tests on the production of 186gRe using enriched 186W
- A route for polonium 210 production from alpha-particle irradiated bismuth-209 target
- High accuracy plutonium mass determination by controlled-potential coulometry
- Chemometric approach for prediction of uranium pathways in the soil
- Thermodynamic model for the solubility of Ba(SeO4, SO4) precipitates
- Suitability of various materials for porous filters in diffusion experiments
- Detoxification of azinophos methyl using gamma radiation mediated advance oxidation process and investigation of degradation products by HPLC and GC-MS
- Investigation of elemental and radiological contamination of soils in two shipyards in Chittagong, Bangladesh
- Radionuclide content and state of isotopic disequilibrium in some utilized smoking pastes
- Assessment of natural radioactivity in major building materials of Xiangyang, China
