The effects of impregnation on porosity of activated carbon / Durizah Nur Suhaimin

The purpose of this thesis was to investigate the effects of impregnation to the porosity of activated carbon by using two techniques, i.e., spray and immersion method. The process was performed by impregnating coconut shell-based activated carbon with potassium iodide solution and an additional reducing agent. From the results that obtained, it was found that the adsorption capacity of iodine number was decreased inversely with the weight of the sample as well as the effect of added reducing agent. The presence of an additional reducing agent in the impregnation solution indicates a greater uniformity of distribution of iodide as the impregnation agent on the internat surface of activated carbon. The methylene blue decolourising power was also decreased inversely with the weight of sample. The spray impregnation method was more applicable rather than immersion method, which is time-consuming for effective adsorption capacity.