Imobilizácia rádionuklidov a kadmia v pôdach aplikáciou zeolitu

Title:

Imobilizácia rádionuklidov a kadmia v pôdach aplikáciou zeolitu
The immobilisation of radionuclides and cadmium in soils using application of zeolite

Creator:

Čipáková, Andrea

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:9f667084-8d8d-4e2d-bec2-2abccc245456
uuid:9f667084-8d8d-4e2d-bec2-2abccc245456

Subject:

soil, sorption, distribution coefficient, cadmium, radiostrontium, radiocaesium, zeolite, pôda, sorpcia, rozdeľovací koeficient, kadmium, rádiostroncium, and rádiocézium, zeolit

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Results of cadmium sorption and desorption, as well as distribution coefficients of cadmium in the soils from the Danubian Lowland and from Veľký Ďur (neighbourhood of the nuclear power plant Jaslovske Bohunice) are presented in this study. It was found that Cd adsorption is high in studied soils already after the one-minute lasting Cd-soil contact. The results obtained show that the highest sorption of cadmium is in the loamy-sand soil from Kalinkovo (99.75 %). Zeolite application was the most effective in the loam soil from Macov. Sorption of cadmium in this soil increased by 1.45%. The presence of zeolite in chosen soil samples influenced Cd desorption, too. In loamy-sand soil from Kalinkovo cadmium desorption decreased by 50 % after zeolite application. Sorption experiments with radionuclides (85Sr and 137Cs) were conducted on brown earth from the site Velľký Ďur. The 137Cs sorption is very high in studied soil. Zeolite is more effective in the case of 85Sr. Desorption of radiostrontium decreased by 50% after zeolite application. and V práci sa prezentujú výsledky sorpcie, desorpcie a hodnoty rozdeľovacieho koeficientu kadmia vo vybraných vzorkách pôd Podunajskej nížiny a hnedozeme z lokality Veľký Ďur. Kadmium je silne sorbované sledovanými pôdami už po 1 minúte trvania kontaktu. Najvyššia sorpcia sa pozorovala u hlinito-piesočnatej pôdy z lokality Kalinkovo, kde pomerné adsorbované množstvo S kadmia bolo 99,75 %. Aplikácia zeolitu sa najviac prejavila u hlinitej pôdy z Macova, kde sa pomerné adsorbované množstvo S kadmia zvýšilo o 1,45 %. Zeolit ovplyvnil aj desorpciu naviazaného kadmia v sledovaných pôdnych vzorkách. Najviac kadmia sa desorbovalo z hlinito-piesočnatej pôdy z Kalinkova a aplikácia zeolitu znížila pomerné desorbované množstvo kadmia na menej ako polovicu. Sorpčné experimenty s rádionuklidmi (85Sr a 137Cs) boli vykonané na hnedozemi z lokality Veľký Ďur. 137Cs je už samotnou pôdou sorbované takmer na 100 % a prítomnosť zeolitu už sorpciu prakticky nezvyšuje. Zeolit zvyšuje sorpciu hlavne u rádiostroncia. Desorpcia stroncia po aplikácii zeolitu sa znížila o 50 %.

Language:

Slovak

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

320-340

Source:

Journal of hydrology and hydromechanics | 2002 Volume:50 | Number:4

Harvested from:

CDK

Metadata only:

false