Journal of Kermanshah University of Medical Sciences:
Vol.14, issue 3; e79471
published online:
December
19,
2010
article type:
Research Article
received:
September
14,
2009
accepted:
February
16,
2010
The effect of hydrogen peroxide and solvent on photolysis of PCBs to reduce occupational exposure
authors:
Hasan Asilian
1
,
Reza Gholamnia
1
, *
,
Abbas Rezaee
1
,
Ahmad Jonidi Jafari
2
,
Ali Khavanin
1
,
Elmira Darabi
3
Dept. of Occupational and Environmental Health, School of Medicine Sciences, Tarbiat Modares University, Tehran, Iran
Dept. of Occupational Health, School of Health, Iran University of Medical Sciences, Tehran, Iran
Labratory of Llife Environment Organization, Tehran, Iran
how to cite:
Asilian
H, Gholamnia
R, Rezaee
A, Jonidi Jafari
A, Khavanin
A, et al. The effect of hydrogen peroxide and solvent on photolysis of PCBs to reduce occupational exposure. J Kermanshah Univ Med Sci. 2010;14(3):e79471.
Abstract
Background: Polychlorinated biphenyls (PCBs) are toxic bio-accumulate components and may increase risk of adverse effects on human health and the environment. For different social, technical and economic reasons, significant quantities of PCBs contaminated transformer oil are still in use or storied. The study aimed to determine the effect of hydrogen peroxide and solvent on photolysis of PCBs to reduce occupational exposure.
Methods: The photochemical annular geometry (500 ml volume) reactor was designed with a cylindrical low-pressure mercury lamp (UV-C Cathodeon TUV 6WE) with emission at 254 nm. The radiant power emitted by the lamp was 6w. The whole lamp was immersed in a reactor thermostat controlling of temperature at 32 ± 2 oC. The PCBs was determined using GC/ECD and data was analyzed by SPSS.
Results: Degradation of total PCBs in terms of %10 and %20 of volume of H2O2 were 41%, 75% and 94%, respectively. The degradation of total PCBs in terms of ratio to solvent with oil transformer in 1:1, 2:1 and 3:1 was 61%, 75% and 94%, respectively.
Conclusion: Our study show that UV-C photolysis of H2O2 leads to a degradation efficiency of PCBs only in the presence of isooctane, therefore indicating that the intermediates formation after ethanol oxidation are able to initiate PCBs degradation.