Heavy metal removal study is conducted from synthetic waste water by reduction and oxidation(redox) reaction of Cu-Zn metal alloy and adsorption reaction of aluminium silicate. Heavy metal whose ionization tendency is smaller than zinc are reducted in an aqueous solution, and the concentration of ionized zinc is reduced by adsorption reaction. The average diameter of metal alloy micro fiber is about 200㎛, and the surface area is wide enough to get equilibrium in a single cycle treatment. A single cycle treatment of redox reaction of Cu-Zn metal alloy, could remove 100% of Cr(Ⅲ), 98% of Hg, 92% of Sn and 91.4% of Cu respectively. An ionization tendency of chromium is very close to zinc, but removal efficiency of chromium by redox reaction is significant. This result shows that trivalent chromium ion is expected to generate hydroxide precipitation with OH- ion generated by redox reaction. In the pC-pH diagram, it was predicted that the precipitation of mercury and tin in the raw solution could be predicted in advance, and in the solution containing various heavy metals rather than single heavy metal, it is removed to a lower concentration than the theoretical value due to coprecipitation. Zinc ion generated by redox reaction is readily removed by adsorption reaction and hydroxide precipitation of aluminium silicate in a single cycle treatment. Other heavy metal components which are not perfectly removed by redox reaction also showed very high removal efficiency of 98% or more by adsorption reaction and hydroxide precipitation through regardless of the flow rate and temperature. Aluminium ion is not increased by adsorption reaction of aluminium silicate. That means heavy metal ion removal mechanism by adsorption reaction is turned out to be not an ion exchange reaction, but an adsorption reaction and hydroxide precipitation.