LEACHING OF URANIUM FROM SOLID RADIOACTIVE WASTE BY HYDROCHLORIC ACID SOLUTIONS

The maximum degree of uranium extraction of 99% was obtained by HCl an excess con-centration of more than 74 gL-1, the uranium content in the PR is 255 mgL-1. According to the results of XRD, the insoluble residue of leaching consists of CaSO4*2H2O 62-84%, CaF2 10-31%, graphite 3-7% and SiO2 1-5%

SORPTION PROCESSING OF PRODUCTIVE SOLUTIONS OBTAINED BY SULFURIC ACID LEACHING OF URANIUM FROM SLUDGE

Uranium sorption has carried out in a dynamic mode using the Purolite A660/4759 ani-onite; the total dynamic exchange capacity for uranium was 17.9 kg/m3. The mass fraction of uranium in the concentrate obtained after precipitation with ammonia from the commercial regenerate was 68.54%

URANIUM SORPTION FROM PREGNANT SOLUTIONS OF SLUDGE CARBONATE LEACHING

The possibility of uranium recovery from pregnant solutions of sludge carbonate leaching by strong basic anion-exchangers was studied. Sorption of U by resins in carbonate and chlo-ride forms was not effective, and residual content of uranium in liquid phase after sorption was high

PROCESSING OF SULFURIC-ACID SOLUTIONS OF URANIUM IN SITU LEACHING WITH HIGH CONTENT OF CHLORINE

The processing of sulfuric-acid solutions after uranium in situ leaching with high content of chlorine was studied. The precipitation by different methods allows to obtain uranium con-centrates with high quality according to ASTM C967-13

METABOLIC SINGLE-PHOTON EMISSION COMPUTED TOMOGRAPHY WITH THE NEW RADIOPHARMACEUTICAL ⁹⁹ᵐTc-1-thio-D-glucose IN THE DIAGNOSIS AND MONITORING OF THE PRIMARY BREAST LYMPHOMA (CASE REPORT)

The article shows the feasibility of detecting and monitoring primary breast diffuse large B-cell lymphoma using single-photon emission computed tomography (SPECT) with 99mTc-1-thio-D-glucose (99mТс-TG), a new radiopharmaceutical. The innovative radiopharmaceutical makes it possible to evaluate the metabolism of tumor tissue without using positron emission tomography. The findings of 99mTc-TG SPECT obtained during diagnosis and monitoring of the patient were confirmed by the results of computed tomography. A comprehensive examination of the patient, including 99mTc-TG SPECT, made it possible to diagnose a rare case of primary breast lymphoma. Primary breast lymphoma accounts for 1.7–2.2 % of all extranodal nonHodgkin lymphomas. Diffuse large B-cell lymphoma is the most common histological type occurring usually as a unilateral palpable tumor in middle-aged women. Extranodal lymphomas account for less than 0.5 % of all malignant neoplasms of the breast. After 6 courses of immunochemotherapy, the patient underwent 99mTc-TG SPECT, which demonstrated persistent hypermetabolic activity in the breast. The patient received radiation therapy to the remaining tumor of the left breast. The patient is in remission and followed up at the Cancer Research Institute of Tomsk National Research Medical Center. Thus, 99mTc-TG SPECT is believed to be a promising method for visualizing primary breast lymphomas and assessing their treatment outcomes. It is an alternative to the standard approach using 18F-FDG positron emission tomography. The method compares favorably with positron emission tomography with its wide availability and low cost of study

URANIUM PRECIPITATION FROM PRODUCTIVE SOLUTIONS OBTAINED BY ACID LEACHING OF URANIUM-CONTAINING SLUDGE

Uranium concentrate was precipitated using ammonia, pH = 6.8-7.0, temperature 45-50 ºС. The concentrate obtained during the precipitation was studied by various physicochemical methods. It was found that concentrate consisted of CaMg2Al2F12 (98.35%) and SiO2 (1.65%)