Abstract: Taking the strains T1 (Cellulosimicrobium funkei) screened out as the research object， and the law of the adsorption with Zn2+of acid mine drainage (AMD) by the immobilized biological activated carbon (IBAC) technology was studied. The results indicated that the removal rate of Zn2+ reaches to 7518%and the water quality is improved， under the optimum running parameters of IBAC reactor for treating AMD with pH of 4 and initial concentration of Zn2+ of 10000mg/L， such as hydraulic loading rate of 019m3·(m2·h)-1， gaswater ration of 10∶1， and hydraulic retention time of 380h. Coexisting ions of Cu2+， Cd2+， Fe3+ and Ni2+ can reduce removal of Zn2+by IBAC. Scanning electron microscopy images showed that strain T1 cells are fibrousshape and attach and grow on the surface of the activated carbon particles， and cells volume expansion occurs after adsorption Zn2+. EDS analysis shown that the microorganism fixed in activated carbon particle surface adsorbs a large of Zn2+. Reaction kinetics studies shown that it is basically fit for firstorder kinetics model that the IBAC adsorbs Zn2+ in AMD.

Key words: immobilized biological activated carbon, acid mine drainage, heavy metal zinc ions, biosorption of microorganism, strains T1