In order to investigate the characteristics and the optimum condition of the gas-liquid interface adsorp-tive separation of metal sulfides, the coagulation-dispersion and the adsorptive separation of the single and mixed systems were experimentally carried out, and the adsorptive separation model was considered. Theoretically, the separation rate of fine particles by gas-liquid interface adsorption was derived under the assump-tion of adsorption by collision between rising bubbles and particles. The relation between the residual concentration of fine particles and the bubbling time was obtained as follows and this equation proved successful with the experimental results.
C=Co exp[-(3/4)fㆍ(Gh/Va)ㆍt]
The effects of air flow rate, column height and ethylhexadecyldimethylammonium bromide(EHD-Br) concen-tration on the collection effciency have experimentally been investigated. The collection efficiency was maximum at the optimum concentration of EHDA-Br for the coagulation, i.e., 0.06-0.13moles of EHD-Br per unit mole of metal sulfides.