Abstract
AbstractThe rate of mass transfer of three heavy metal ions such as Cu, Ni, and Zn across a regenerated cellulose membrane in a batch dialysis cell was measured by conductivity method by air-sparging. Air-spargingenhanced the rate of mass transfer depending on the air velocity. The increase in mass transfer coefficient ranged from 83.3 to 125%, 149.83 to 200%, and 99.4 to 201.52% for Cu, Ni, and Zn, respectively. The exponent values of superficial velocity agreed with the values obtained in previous studies on heat and mass transfer in bubble-stirred systems. The ranges of exponents were 0.0093 < Re Fr < 0.0467, 110,584.3 < Sc < 240214.9,2.11e-5 < St < 9.45e-5. The overall mass transfer correlation came to J = 0.027 (Re Fr)−0.261
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