The concentrations of difference between the membrane phase and feed phase based on the mechanism of mass extraction. In the case of feed solution represented radioactive simulated waste solution and dissolved in 0.5M HNO3. In the feed phase decreasing with H+ concentration. pH values at 2.5 into 5.5 in the feed phase. Fig,s(5a-5c). Shown the effect of hydrogen ion concentration in the feed phase and studied of pH range 2.5-5.5 for 0.5M HNO3. Stripping solution of 0.05M of EDTA. Initial concentration of simulation radioactive waste. Show the 90Sr , 137Cs and 60Co in the feed phase = 5X10-2 Mol/l. The volume ratio of membrane solution was 1:1 . Concentration of membrane as 0.01M .Show that Fig,s(5a-5c). The percentage of 90Sr about 97.7%
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The transport of 90Sr , 137Cs and 60Co through disc ceramic -supported liquid membrane impregnated in P5 diluted in toluene was examined. The study of The mass transfer rate, expressed as permeability (P), focused on diffusion through the aqueous layer in the feed solution, the organic layer and the aqueous layer in the stripping solution. The aqueous feed solution speed Homogenizer (300-800 ml/min), carrier concentration (0.1-20% v/v), aqueous stripping solution Homogenizer (300-1300 ml/min) and feed concentration 1250 ppm) with 0.5 M HNO3 in the product phase. pH of the feed solution was 5.0. The measured permeabilities were compared to generally accepted mass transfer correlations. The validity of the prediction was evaluated with the experimental data, and the data were found to tie in well with the theoretical …show more content…
The receiving phase being another radioactive waste , and varying concentrations of HAp composite in the range 0.1 to 0.7 M dissolved in toluene on disc hydroxyapatite support, revealed no change in the permeation coefficient (5.2x10-3 cm/s) at higher carrier concentrations (0.1-0.9 M) against the value of 2.9x10-3 cm/s obtained for a 0.22 M HAp composite solution in toluene. Accordingly, to Eq (3) and considering the value of 4x10-3 cm/s as the limiting permeability value, the thickness of the aqueous diffusion film is calculated as 2.8x10-3 cm. And assuming a value of 10-5 cm2/s for Daq (average diffusion coefficient) , then daq= 5.3x10-3 cm. This value (daq) is the minimum thickness of the disc apatite in aqueous diffusion layer in the present experimental conditions. Thus the maximum permeability was found to be (12, 8.5,5)x106 cm/Sec for 90Sr ,137Cs, and 60Co and
The transport of 90Sr , 137Cs and 60Co through disc ceramic -supported liquid membrane impregnated in P5 diluted in toluene was examined. The study of The mass transfer rate, expressed as permeability (P), focused on diffusion through the aqueous layer in the feed solution, the organic layer and the aqueous layer in the stripping solution. The aqueous feed solution speed Homogenizer (300-800 ml/min), carrier concentration (0.1-20% v/v), aqueous stripping solution Homogenizer (300-1300 ml/min) and feed concentration 1250 ppm) with 0.5 M HNO3 in the product phase. pH of the feed solution was 5.0. The measured permeabilities were compared to generally accepted mass transfer correlations. The validity of the prediction was evaluated with the experimental data, and the data were found to tie in well with the theoretical …show more content…
The receiving phase being another radioactive waste , and varying concentrations of HAp composite in the range 0.1 to 0.7 M dissolved in toluene on disc hydroxyapatite support, revealed no change in the permeation coefficient (5.2x10-3 cm/s) at higher carrier concentrations (0.1-0.9 M) against the value of 2.9x10-3 cm/s obtained for a 0.22 M HAp composite solution in toluene. Accordingly, to Eq (3) and considering the value of 4x10-3 cm/s as the limiting permeability value, the thickness of the aqueous diffusion film is calculated as 2.8x10-3 cm. And assuming a value of 10-5 cm2/s for Daq (average diffusion coefficient) , then daq= 5.3x10-3 cm. This value (daq) is the minimum thickness of the disc apatite in aqueous diffusion layer in the present experimental conditions. Thus the maximum permeability was found to be (12, 8.5,5)x106 cm/Sec for 90Sr ,137Cs, and 60Co and