Decontaminating aq. effluent contg. organic cpd. marked with radioisotope - by treatment with microorganisms able to fix organic cpd. or degradation prod. or to convert to gas contg. radioisotope

摘要

Decontamination of an aq. effluent with moderate activity, contaminated by organic molecules marked with a radioactive isotope and/or their organic or mineral degradation prods., involves (a) contacting the effluent with a microorganism phase capable of fixing the organic molecules and/or their degradation prods. by biosorption and/or anabolisation, and/or of converting them to form gaseous prods. contg. the radioactive isotope, and (b) sepg. the microorganisms from the treated effluent. The radioactive isotope is 14C, tritium, 32P or 35S, and the aq. effluent contains prods. formed during the prodn. and/or use of marked organic and/or mineral substances. ADVANTAGE - Use of supplementary treatments is avoided, and radioactive pollutants are conc. in a solid phase which can easily be mineralised, avoiding storage problems.