Synthesis and properties of the composite sorbents on the basis of alumosilicates separated from the clay-salt slimes

The composite sorbent, including an active inorganic component (alumosilicates derived from claysalt slimes) in the quantity of more than 80 wt % and the polymer binder (polyacrylamide) was obtained. The influence of various factors on its sorption and mechanical properties were studied. It is established that the content of polyacrylamide in the composite sorbent should be in the range of 10–15 wt %. It is shown that quasi-equilibrium of 137Cs in the system “sorbent – solution” is reached within 80 min. The distribution coefficient (Kd) is 2.4 ? 104 cm3/g. The obtained data of kinetic parameters (diffusion coefficient and during sorption half-time) show that the received sorbent can be referred to sorbents with high rate of 137Cs sorption

Clay‑salt slimes of the “Belaruskali” ‑ novel sorbents for management of liquid radioactive wastes and decontamination of environmental water streams

Clay-salt slimes, production wastes from “Belaruskali” (A Belarusian factory, producing potash fertilizers), have been tested as a low-cost, eco-friendly potential sorbent for the removal of radionuclides from aqueous solutions, and may be a component of the cement filling of drums used in the storage of radioactive wastes. The efficiency of sorptive removal of caesium(I)-137, strontium(II)-90, europium(III)-152, and americium(III)-241 was examined with respect to the time of phase equilibration, pH, sorbent dosage, and the presence of salts and complexing agents. Irradiation stability of the material was also studied. It was found that uptake of the radionuclides is almost complete. A procedure for the removal of technetium-99 has been also proposed. Experimental results obtained within the presented work confirm our expectations

Chemical and Mineralogical Aspects of Clay-salt Slimes of “Belaruskali” Using for the Preparation of Nanostructured Sorbents of Radionuclides

Особое значение имеет исследование эффективных и недорогих сорбционных материалов для иммобилизации радионуклидов. Для решения вышеуказанных проблем предполагается разработать ресурсосберегающую технологию производства многоцелевых наноструктурированных сорбентов радионуклидов (137Cs, 90Sr) с заданными физико-химическими свойствами на основе отходов калийной промышленности - глинисто-солевых шламов. (CSS) ОАО "Беларуськалий"

Chemical and Mineralogical Aspects of Clay-salt Slimes of “Belaruskali” Using for the Preparation of Nanostructured Sorbents of Radionuclides

Особое значение имеет исследование эффективных и недорогих сорбционных материалов для иммобилизации радионуклидов. Для решения вышеуказанных проблем предполагается разработать ресурсосберегающую технологию производства многоцелевых наноструктурированных сорбентов радионуклидов (137Cs, 90Sr) с заданными физико-химическими свойствами на основе отходов калийной промышленности - глинисто-солевых шламов. (CSS) ОАО "Беларуськалий"

Clay-salt slimes of the JSC ‘‘Belaruskali’’ as potential engineering barriers in the radioactive waste repositories: sorption of Cs(I), Sr(II), Eu(III) and Am(III)

В статье представлены результаты сорбции цезия (I), стронция (II), европия (III) и ионов америция (III) на алюмосиликатах, отделенных от шламов кизолита в зависимости от времени контакта, рН, концентрации исходного металла

Development of amendments for rehabilitation of soils, contaminated by radionuclides, and assessment of their application efficacy

Sapropels, hydrolyzed lignin (HL), clay-salt slimes (CSS) and phosphogypsum (PG) have been used as components to develop efficacious and ecologically safe amendments. Methods and models for forecasting effectiveness of countermeasures based on application of such amendments have been proposed. It has been found that 137Cs selective sorption on organo-mineral amendments is enhanced after incubation, as compared with the calculated values on the basis of the fractions of total mass of source components and their own ability for 137Cs selective sorption. The measured RIP(K) value for the mixtures of soddy-gley soil and organo-mineral amendment at 2% was 1.2–1.6 higher than the calculated one, and at 10% 1.5–1.7 times higher than the calculated