Irradiation on polluted water
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概要
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An use of gamma irradiation was studied as a meansremoval of chemical contaminants from water. Phenol and dodecyl benzene sulfonate were added as pollutants to raw water and sedimentation effect by coagulation was examined after irradiation of this sample water under the doses of 1× 10<SUP>4</SUP>rad or 1× 10<SUP>5</SUP>rad of gamma ray fromCo<SUP>60</SUP>source.<BR>Appreciable reduction in the concentration of these pollutants was observed in the irradiated water, when compared with the water treated only by sedimentationwith coagulation. Administration of the treated water to mice ad libitum as drinking water revealed no deleterious effect on their growth after one month's feeding. Toxicity test was also performed by using Japanese gold fish.<BR>A Co<SUP>60</SUP>sourde with 1.1× 10<SUP>7</SUP>Ci will be required when polluted water is irradiated at the rate of one metric ton per hour under a dose of 1×10<SUP>4</SUP>rad.Further studies of the effects of irradiation are under way on such water pollutants as organic pesticides anddyes and also on COD and BOD values, etc.
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