Sorption of curium by silica colloids: Effect of humic acid

Kar, Aishwarya S.; Kumar, Sumit; Tomar, B. S.; Manchanda, V. Κ.

doi:10.1016/j.jhazmat.2010.12.092

Cited by 19 publications

(8 citation statements)

References 34 publications

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“…Almost 100% sorption at higher pH can be attributed to complexation between Cm(III) and ≡SiO − surface sites of silica. The results are in agreement with the literature data for sorption of Eu(III)/Cm(III) by silica [16,17,20].…”

Section: Surface Complexation Modeling (Scm)supporting

confidence: 92%

“…The percentage sorption of Cm(III) by silica was determined by measuring the alpha activity of 244 Cm in the control solution and in the supernatant after the equilibration and centrifugation of suspensions. The detailed methodology of performing the sorption experiment is given in our previous work [17].…”

Section: Batch Sorption Studiesmentioning

confidence: 99%

“…With this in view, the data for sorption of Cm(III) by silica in presence of HIBA were compared with those in presence of HA [17]. The data are shown in Figure 7.…”

Section: Comparison Of Silica-hiba(i)-cm and Silica-ha-cm Systemsmentioning

confidence: 99%

“…The complexing anions include simple organic molecules, viz., carboxylic acids, amino polycarboxylic acids as well as complex molecules, such as, fulvic acid and humic acid (HA). The influence of complexing anions on sorption of actinides by minerals and clays have been extensively studied in literature [5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The sorption phenomena in systems containing simple molecules are easier to explain as complexation of metal ions with such molecules are well understood [19].…”

Section: Introductionmentioning

confidence: 99%

“…was kept as 48 h for further experiments in order to compare the influence of HIBA on Cm(III) sorption by silica with that of HA for which the equilibration time was kept 48 h[17].…”

mentioning

confidence: 99%

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Cm(III) sorption by silica: effect of alpha hydroxy isobutyric acid

Kar¹,

Tomar

2014

Radiochimica Acta

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Sorption of Cm(III) on silica surface from aqueous solutions of varying pH was investigated in absence and presence of alpha hydroxy isobutyric acid (HIBA) by employing batch sorption and surface complexation modeling (SCM). Cm(III) sorption on silica increased with the pH of the suspension and remained constant above pH∼6. With increase in HIBA concentration, the sorption edge shifted to higher pH. The effect of addition order of HIBA and Cm(III) on the sorption was studied and higher shift in sorption edge, as compared to binary system, was observed when HIBA was added to silica suspension prior to Cm(III). The sorption data could be satisfactorily explained by SCM in all the systems. The results have been compared with that reported earlier on the effect of HIBA on sorption behaviour of Eu(III) by silica. Further, the use of small organic molecules as model compounds of humic acid (HA) has been evaluated by comparing the influence of HA and HIBA on sorption of Cm(III) on to silica.

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Section: Surface Complexation Modeling (Scm)supporting

confidence: 92%

Section: Batch Sorption Studiesmentioning

confidence: 99%

“…With this in view, the data for sorption of Cm(III) by silica in presence of HIBA were compared with those in presence of HA [17]. The data are shown in Figure 7.…”

Section: Comparison Of Silica-hiba(i)-cm and Silica-ha-cm Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…was kept as 48 h for further experiments in order to compare the influence of HIBA on Cm(III) sorption by silica with that of HA for which the equilibration time was kept 48 h[17].…”

mentioning

confidence: 99%

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