The Preparation And Application Of Activated Carbon Catalytic Oxidation System For Water Treatment

The systems of activated carbon supported transition metals were prepared and treated simulant dye wastewater and drinking water. The reproduction of the systems has been examined as well.The systems were prepared from wooden-dust or bamboo-dust by use of H3PO4 as an activating agent and transition metals Ni-Cu-K or Mn-Cu-K as catalysts and a set of the best preparation condition was verified by orthogonal experiment. Meanwhile, the property of activated carbon-supported transition metals system was estimated and proved better than that of activated carbon without metals. For example, the specific surface area of Ni-Cu-K-AC is 1274.50m2/g while the surface area of AC without metals is only 750.33 m2/g. Therefore, the metals may be responsible for the catalytic performance in the process of activation for more transitional pores in the system.Batch test of water treatment indicated that, to the COD and color, the system, with the properties of adsorption and catalysis, afforded a high removal efficiency which reached 80% with aeration. In comparison with activated carbon without metals, the systems afforded a 20% higher removal efficiency to the COD and color for dye wastewater treatment. The effects of operating variables, such as reactive time and original dye concentration, were considered as well. The amount of treated Activated Red X-3B wastewater by the system was determined through dynamic test and the adsorption- catalytic oxidation mechanism was discussed.To the drinking water treatment, the activated carbon supported transition metal system can efficiently removed the color, turbidity, COD, hardness and bacteria. Thermal reproduction was used for the out-of-work systems.