Table 1 shows the characteristics of granular activated carbon (GAC) impregnated with different percentages of zinc chloride. It can be deduced that as the impregnation ratio increases, the bulk density, ash and moisture content increase but not in same proportion to impregnation ratios. Table 2 shows the characterization in terms of pH with different impregnation ratio of zinc chloride. The pH value of the bamboo carbon with no Zncl2 was 7.2 but for those impregnated with Zncl2 the pH values fell to the acidic range of 4.1-5.5 before washing. This may be due to the impregnation salt used. After series of washing, the pH values increased to 6.8-7.0. Average particle size of GAC was evaluated to be 29.7μm. Table 2b shows the standard proposed by Zheejlang in china.