Sorption of rhenium on alumina under dynamic conditions

Journal of the Serbian Chemical Society

Milonjić Slobodan K.¹  Lukić Dragoljub M.²  Vučina Jurij L.² 

[1] Laboratorija za hemijsku dinamiku, Institut za nuklearne nauke 'Vinča', Beograd;Laboratorija za radioizotope, Institut za nuklearne nauke 'Vinča', Beograd;

关键词: rhenium;    sorption;    alumina;    sorption capacity;    sorption isotherm;   

DOI  :  10.2298/JSC0706555L

来源: DOAJ

【 摘 要 】

The sorption of perrhenate anion on alumina from aqueous solutions of sodium chloride was investigated under dynamic conditions. The initial concentrations of rhenium were in the range of 2.7x10-2-2.7 mmol/dm3. The breakthrough curves as the function of Re and NaCl concentrations (0.12-0.20 mol/dm3), pH 2-6 and flow rate 3-10 ml/min were determined. According to the experimental results, it was concluded that the breakthrough capacities, the capacities at c/c0 = 0.5, the total column capacities and the utilization degrees (column efficiency) increase with increasing Re and NaCl concentrations and decreasing pH. The optimal flow rate was found to be 3 ml/min. At pH2 and c0 = 2.7 mmol Re/dm3, the total capacity was found to be Q 0.9 max = 2.1x10-2 mmol Re/g Al2O3. The data for perrhenate anions fit with a Henry-type isotherm. It was found that, under the above mentioned conditions, the value of the Henry constant K H was 7.8x10-3 dm3/g and the Gibbs energy change, ΔG was -0.5 kJ/mol.

【 授权许可】

Unknown