Influence of bentonite and zeolite on Cs+ and Co2+ cement matrix leaching phenomena
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The probability of Cs+ and Co2+ ions retention by immobilization processes in the cement matrix was determinate as the subject of analyses: matrix design, water/cement ratio, and structure porosity. Comparison of experimental results was accomplished by Hespe standard leaching method. Diffusion and semi-empirical models were used for the assessment of the washing rate as a function of time. The higher value of cement matrix mechanical resistance corresponds to a lower value of Co2+ and Cs+ ions leaching. The Co2+ leaching level was more than two orders of magnitude less than the leaching level of Cs+. The influence of bentonite and zeolite on Co2+ leaching reduction was significantly smaller in comparison with Cs+, while zeolite had a higher Cs+ and Co2+ sorption ability than bentonite. Under static leaching conditions, the contribution of diffusion to the total transport of ions in the matrix porous medium was dominant. The contribution of matrix dissolution was insignificant concerni...ng the dominant contribution of diffusion and surface washing. The semi-empirical model showed a better approximation of the Co2+ and Cs+ ions laboratory leaching process.
Кључне речи:
leaching / immobilization / sorption / radioactive wasteИзвор:
Nuclear Technology and Radiation Protection, 2021, 36, 1, 60-65Финансирање / пројекти:
- Ministry of Education, Science and Technological Development of the Republic of Serbia
DOI: 10.2298/NTRP201130003D
ISSN: 1451-3994
WoS: 000694933700007
Scopus: 2-s2.0-85115303792
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Институција/група
VinčaTY - JOUR AU - Dimović, Slavko AU - Jelić, Ivana V. AU - Šljivić-Ivanović, Marija Z. PY - 2021 UR - https://vinar.vin.bg.ac.rs/handle/123456789/9951 AB - The probability of Cs+ and Co2+ ions retention by immobilization processes in the cement matrix was determinate as the subject of analyses: matrix design, water/cement ratio, and structure porosity. Comparison of experimental results was accomplished by Hespe standard leaching method. Diffusion and semi-empirical models were used for the assessment of the washing rate as a function of time. The higher value of cement matrix mechanical resistance corresponds to a lower value of Co2+ and Cs+ ions leaching. The Co2+ leaching level was more than two orders of magnitude less than the leaching level of Cs+. The influence of bentonite and zeolite on Co2+ leaching reduction was significantly smaller in comparison with Cs+, while zeolite had a higher Cs+ and Co2+ sorption ability than bentonite. Under static leaching conditions, the contribution of diffusion to the total transport of ions in the matrix porous medium was dominant. The contribution of matrix dissolution was insignificant concerning the dominant contribution of diffusion and surface washing. The semi-empirical model showed a better approximation of the Co2+ and Cs+ ions laboratory leaching process. T2 - Nuclear Technology and Radiation Protection T1 - Influence of bentonite and zeolite on Cs+ and Co2+ cement matrix leaching phenomena VL - 36 IS - 1 SP - 60 EP - 65 DO - 10.2298/NTRP201130003D ER -
@article{ author = "Dimović, Slavko and Jelić, Ivana V. and Šljivić-Ivanović, Marija Z.", year = "2021", abstract = "The probability of Cs+ and Co2+ ions retention by immobilization processes in the cement matrix was determinate as the subject of analyses: matrix design, water/cement ratio, and structure porosity. Comparison of experimental results was accomplished by Hespe standard leaching method. Diffusion and semi-empirical models were used for the assessment of the washing rate as a function of time. The higher value of cement matrix mechanical resistance corresponds to a lower value of Co2+ and Cs+ ions leaching. The Co2+ leaching level was more than two orders of magnitude less than the leaching level of Cs+. The influence of bentonite and zeolite on Co2+ leaching reduction was significantly smaller in comparison with Cs+, while zeolite had a higher Cs+ and Co2+ sorption ability than bentonite. Under static leaching conditions, the contribution of diffusion to the total transport of ions in the matrix porous medium was dominant. The contribution of matrix dissolution was insignificant concerning the dominant contribution of diffusion and surface washing. The semi-empirical model showed a better approximation of the Co2+ and Cs+ ions laboratory leaching process.", journal = "Nuclear Technology and Radiation Protection", title = "Influence of bentonite and zeolite on Cs+ and Co2+ cement matrix leaching phenomena", volume = "36", number = "1", pages = "60-65", doi = "10.2298/NTRP201130003D" }
Dimović, S., Jelić, I. V.,& Šljivić-Ivanović, M. Z.. (2021). Influence of bentonite and zeolite on Cs+ and Co2+ cement matrix leaching phenomena. in Nuclear Technology and Radiation Protection, 36(1), 60-65. https://doi.org/10.2298/NTRP201130003D
Dimović S, Jelić IV, Šljivić-Ivanović MZ. Influence of bentonite and zeolite on Cs+ and Co2+ cement matrix leaching phenomena. in Nuclear Technology and Radiation Protection. 2021;36(1):60-65. doi:10.2298/NTRP201130003D .
Dimović, Slavko, Jelić, Ivana V., Šljivić-Ivanović, Marija Z., "Influence of bentonite and zeolite on Cs+ and Co2+ cement matrix leaching phenomena" in Nuclear Technology and Radiation Protection, 36, no. 1 (2021):60-65, https://doi.org/10.2298/NTRP201130003D . .