Effects of calcium and magnesium on strontium distribution coefficients

Bunde, R. L.; Rosentreter, Jeffrey J.; Liszewski, M.J.; Hemming, C. H.; Welhan, J. A.

doi:10.1007/s002540050210

Cited by 34 publications

(9 citation statements)

References 11 publications

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“…by soil was largely suppressed in the presence of competing cations such as Ca 2? (Bunde et al 1997), as well as that sorption of trace Sr 2? amounts onto calcareous soil was completely reversible in Ca 2?…”

Section: Co 21 and Sr 21 Desorptionmentioning

confidence: 96%

Evaluation study of cobalt(II) and strontium(II) sorption–desorption behavior for selection of soil remediation technology

Smičiklas

Dimović

Jović

et al. 2015

Int. J. Environ. Sci. Technol.

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Sorption-desorption properties of cobalt(II) and strontium(II) ions were studied using a soil sample from the vicinity of the Serbian radioactive waste processing and interim storage facilities. The mobility of the cations in the soil was evaluated and compared with the intention to facilitate the selection of optimal remediation strategy in case of accidental soil contamination with radioactive cobalt-60 and strontium-90 isotopes. A systematic sorption study was performed through a series of batch experiments at different aging times, cation concentrations and pH. Kinetics experiments revealed that sorbed amounts of cobalt(II) continuously increased with contact time until quasi-equilibrium was reached, while initial fast strontium(II) sorption was followed by a desorption step. Based on the shapes of the sorption isotherms and calculated sorption parameters, it was concluded that cobalt(II) sorbed more selectively and strongly than strontium(II). Sequential extraction showed that, regardless of the initial content of contaminants in the soil and the aging time, high amounts of both cations were bonded to relatively mobile fractions: strontium(II) in the exchangeable, while cobalt(II) in the carbonate and ferromanganese oxide fraction. Strontium(II) was readily desorbed in acidic, calcium(II) and ethylenediaminetetraacetic acid-containing media, whereas complexing agents such as citric and tartaric acids at low pH were more effective reagents for cobalt(II) desorption. The results from the present study indicate that chemical extraction can be considered as remediation option for strontium(II)-and cobalt(II)-contaminated soil.

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Section: Co 21 and Sr 21 Desorptionmentioning

confidence: 96%

Evaluation study of cobalt(II) and strontium(II) sorption–desorption behavior for selection of soil remediation technology

Smičiklas

Dimović

Jović

et al. 2015

Int. J. Environ. Sci. Technol.

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“…Krouglov et al (1998) reported that the adsorption mechanism in soil is mainly an ion exchange reaction. Bunde et al (1997) reported that the Ca 2? were found to compete with Sr 2?…”

Section: Effect Of Sodium and Calcium Ions On K Dmentioning

confidence: 99%

Geochemical and thermodynamic aspects of sorption of strontium on kaolinite dominated clay samples at Kalpakkam

Rani

Sasidhar

2011

Environ Earth Sci

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The mobility of strontium in subsurface is largely influenced by sorption on to clay minerals. In the present study, kaolinite clay samples collected from the Kalpakkam nuclear plant site were employed to understand the sorption characteristics of strontium by batch method. The effect of several parameters such as time, strontium ion concentration, pH, temperature and ionic strength was investigated. The kinetic studies suggested pseudo-secondorder mechanism. The experimental sorption data was fitted to Langmuir adsorption model for obtaining the sorption capacity of the sorbent. The maximum sorption capacity was 5.77 mg/g at 298 K and was found to increase with an increase in temperature. It was observed that the distribution coefficient (K d ) of strontium on clay increased as the pH of the solution increased. The distribution coefficient was found to decrease with an increase in concentration of Na ? and Ca 2? ions. This variation of K d suggests that cation exchange is the predominant sorption process. It was also observed that sorption process is endothermic. The thermodynamic parameters such as DG 0 , DH 0 and DS 0 were calculated. The negative values obtained for DG 0 indicated that the sorption of strontium on clay was spontaneous at all studied concentrations. DG 0 becomes more negative with an increase in temperature, suggests that the sorption process is more favorable at higher temperatures.

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“…Then, 5 mL of solutions containing 7.6, 17.5, 50.1, 101.1, 127.4, 174.4, 222, and 278 mg/L Sr (in SrCl 2 ) were added to the flasks, respectively, which resulted in an initial concentration ranging from 0.76 to 27.8 mg/L as Sr. The solid to liquid ratio (1:20) was consistent with previous investigations performed by Del Debbio and Thomas (1989) and Bunde et al (1997). The mixtures were shaken for 12 h with a thermostatic shaker at 170 rpm and at 25 C. Separate kinetic tests showed that the equilibration time was sufficient to reach sorption equilibrium.…”

Section: Batch Sorption Studiesmentioning

confidence: 83%

“…In addition, the composition and amount of clay in soil also play a role in Sr attachment to soil particles (Bilgin et al, 2001;Murali and Mathur, 2002;Khan, 2003;Wang and An, 2004). However, other factors such as competitive cations (e.g., Mg 2þ , Ca 2þ , and K þ ) and water-to-solid ratio have also been found to be important factors affecting Sr interactions with soil (Bilgin et al, 2001;Bunde et al, 1997;Zuo et al, 2009).…”

Section: Introductionmentioning

confidence: 97%

Sorption and retardation of strontium in saturated Chinese loess: experimental results and model analysis

Huo

Qian

Hao

2013

Journal of Environmental Radioactivity

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Effects of calcium and magnesium on strontium distribution coefficients

Cited by 34 publications

References 11 publications

Evaluation study of cobalt(II) and strontium(II) sorption–desorption behavior for selection of soil remediation technology

Evaluation study of cobalt(II) and strontium(II) sorption–desorption behavior for selection of soil remediation technology

Geochemical and thermodynamic aspects of sorption of strontium on kaolinite dominated clay samples at Kalpakkam

Sorption and retardation of strontium in saturated Chinese loess: experimental results and model analysis

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