Decontamination of Heavy Metal in Soil by Using Supercritical Carbon Dioxide
نویسندگان
چکیده
Due to an increase of the nuclear power plant, radioactive waste is also increasing trend and due to the large amount of radioactive waste disposal costs also increase. Decontamination of soil contamination is depending on the soil characteristics and environmental factor, so single decontamination method is difficult for effective decontamination. We need innovative method to decontamination, because existing methods of decontamination make many secondary waste and processing costs. Carbon dioxide in a supercritical state is very excellent permeability to penetrate into the contaminants so, it can be easily decontamination the narrow gap. Also after extract contaminated material dissolved in supercritical carbon dioxide, it will be extracted again lowering the pressure of the contaminant. Because of that we can reduce secondary waste, so the cost of the process is significantly expected to be reduced. Because extracted dioxide can be reused, it is economically and ecofriendly decontamination method.
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