Microwave-Enhanced Thermal Desorption of Polyhalogenated Biphenyls from Contaminated Soil
| Autor: | Petr Kastanek, Frantisek Kastanek, Milan Hájek |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Biphenyl
Environmental Engineering Soil test Chemistry Thermal desorption Soil classification Contamination Soil contamination chemistry.chemical_compound Environmental chemistry Desorption Reductive dechlorination Environmental Chemistry General Environmental Science Civil and Structural Engineering |
| Zdroj: | Journal of Environmental Engineering. 136:295-300 |
| ISSN: | 1943-7870 0733-9372 |
| Popis: | The effect of microwave (MW) field on the rate of thermal desorption of polychlorinated biphenyls (PCBs) from long-term contaminated soil was examined in the laboratory environment. For these purposes a modified MW oven was used, with a uniformly extended MW field and a power consumption of 200–600 W. The weight of the soil samples was 100 g, the sum of concentrations of seven indicative congeners of PCB Nos. 28, 52, 101, 118, 153, 138, and 180 was, on average, 264 mg/kg of dry matter. It was experimentally proven that the efficiencies of PCB desorptions were high, over 99.9%. The maximal desorption temperature of 600°C was reached within 15–17 min. It came to light that the presence of alkaline additives in the soil (such as carbonates and alkaline metal hydroxides) did not have an apparent effect on the desorption of PCBs under those conditions. The results concerning the efficiency of PCB separations are in agreement with our previous findings regarding the efficiency of thermal desorption without usin... |
| Databáze: | OpenAIRE |
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