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Catalytic Degradation of Lindane Using Gamma Radiations: Degradation Mechanism
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Radiolytic degradation of lindane (1.0 mg.L-1) in aqueous phase was carried out through gamma (γ) irradiation by 60Co source with 1-12 kGy dose range. The γ- radiation dose was optimized and maximum degradation of lindane was achieved with 10kGy at ambient temperature. The catalytical effect of TiO2 and Fe2O3 on degradation efficiency was investigated. The results demonstrate that degradation was enhanced by addition of catalyst. The maximum degradation of lindane was achieved with TiO2 as compare to Fe2O3. Maximum degradation (%) of lindan was 99% with TiO2; 95% with Fe2O3 and 90.2% without catalyst was achieved at 10 kGy doze. Change in concentration of lindane as result of irradiation was verified by HPLC equipped with UV detector. Lindane degradation products extracted and pre-concentrated through Solid Phase Micro-Extraction (SPME) technique. A reaction mechanism was envisaged by analyzing the resulting by-products using a Gas Chromatography-Mass Spectrometry (GC–MS) technique.
Title: Catalytic Degradation of Lindane Using Gamma Radiations: Degradation Mechanism
Description:
Radiolytic degradation of lindane (1.
0 mg.
L-1) in aqueous phase was carried out through gamma (γ) irradiation by 60Co source with 1-12 kGy dose range.
The γ- radiation dose was optimized and maximum degradation of lindane was achieved with 10kGy at ambient temperature.
The catalytical effect of TiO2 and Fe2O3 on degradation efficiency was investigated.
The results demonstrate that degradation was enhanced by addition of catalyst.
The maximum degradation of lindane was achieved with TiO2 as compare to Fe2O3.
Maximum degradation (%) of lindan was 99% with TiO2; 95% with Fe2O3 and 90.
2% without catalyst was achieved at 10 kGy doze.
Change in concentration of lindane as result of irradiation was verified by HPLC equipped with UV detector.
Lindane degradation products extracted and pre-concentrated through Solid Phase Micro-Extraction (SPME) technique.
A reaction mechanism was envisaged by analyzing the resulting by-products using a Gas Chromatography-Mass Spectrometry (GC–MS) technique.
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