Volume 15, Issue 8 (January 2013)
J Arak Uni Med Sci 2013, 15(8): 35-44 |
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Tajik R, Asilian Mohabadi H, Khavanin A, Joneidi jafari A, Soleimanian A. Decomposition of persistent organic pollutants of environment (PCB compounds) using microwave radiation and H2O2/Tio2. J Arak Uni Med Sci 2013; 15 (8) :35-44
URL: http://jams.arakmu.ac.ir/article-1-1553-en.html
URL: http://jams.arakmu.ac.ir/article-1-1553-en.html
Reza Tajik1 
, Hasan Asilian Mohabadi2 , Ali Khavanin1 , Ahmad Joneidi jafari3 , Ardalan Soleimanian1
, Hasan Asilian Mohabadi2 , Ali Khavanin1 , Ahmad Joneidi jafari3 , Ardalan Soleimanian1
1- tarbiat modaress university
2- tarbiat modaress university ,asilian_h@modares.ac.ir
3- tehran university of medical sciences
2- tarbiat modaress university ,
3- tehran university of medical sciences
Abstract: (11517 Views)
Background: Poly chlorinated biphenyls (PBCs) are the group of organic chemical materials that have a great chemical stability. These compounds are hazardous pollutants which pose various occupational and environmental problems. This study was conducted to determine the effect of microwave rays, hydrogen peroxide, Tio2 catalyst, and ethanol on the decomposition of PBCs. Materials and Methods: In this experimental study, a vessel reactor (250ml volume)that was connected with a tube connector to thecondensor system was used. A microwave oven with a fixed frequency of 2450 MHZ was used to provide microwave irradiation and ray powers used at 540, 720 and 900w. pH and temperature of the samples were continuously monitored and the experiments were repeated three times. Askarel oils were analyzed by GC-ECD. Results: The mean of total PCBS degradation at 540, 720, and 900w was 83.88±1.63, 89.27±2.44, and 95.98±0.81%, respectively. The mean of total PCBS degradation in terms of ratio to solvent with oil transformer in 1:1, 2:1, and 3:1 was 53.8±3.26, 79.04±1.24, and 95.08±1.69%, respectively. The mean of total PCBS degradation in terms of not using H2o2/Tio2 and using H2O2 (20%) and 0.05, 0.1, 0.15, and 0.2 g of Tio2 concurrently was 71.47±0.81, 87.9±2.16, 89.48±1.69, 91.7±1.24, and 93.07±3.09 %, respectively. Conclusion: Using microwave irradiation in the presence of H2O2 oxidant and Tio2 catalyst leads to the reduction of PCBS.
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