Method for preparing high-porosity ozone oxidation nbsCOD catalyst from fenton iron sludge

Abstract

The invention relates to a method for preparing a high-porosity ozone oxidation nbsCOD catalyst from fenton iron sludge. According to the method, treated fenton iron sludge and aluminum oxide are utilized as main raw materials, the defined amount of pore forming agent is added to be evenly stirred and mixed with water, an extruding and rounding method is utilized, the mixed materials are put intoan extruding rod machine, and cylindrical particles with a length to diameter ratio as 0.85 to 1.00 can be obtained by extruding and cutting into particles; the cylindrical particles are put into a balling disk of a centrifuging rounding machine to be formed into balls under the rotation speed of 40 to 50r / min, the balls are dried and put into a chamber type electric resistance furnace to be roasted under 450 to 550 DEG C, thermal insulation is performed for 2 to 4 h, and the high-porosity ozone oxidation nbsCOD catalyst is achieved. The density of the high-porosity ozone oxidation nbsCOD catalyst prepared by the method disclosed by the invention is 0.70 to 1.00 g / cm<3>, the porosity is 65 to 82%, the water absorption is 55 to 75%, and the compressive strength is higher than 80N. The catalyst prepared by the method disclosed by the invention effectively improves capacity of ozone to degrade nbsCOD.

Description

technical field

[0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a method for preparing a high-porosity ozone oxidation nbsCOD catalyst by using Fenton's iron slime. Background technique

[0002] Ozone is a green and environmentally friendly clean energy with strong oxidizing ability and can effectively remove soluble and refractory organic pollutants (nbsCOD). Ozone catalytic oxidation is an advanced oxidation technology developed on the basis of ozone oxidation for advanced sewage treatment. Compared with ozone oxidation alone, ozone catalytic oxidation generates hydroxyl radicals with stronger oxidation ability due to the use of catalysts. , the reaction rate is fast, the selectivity is small, and the decomposition of organic matter is more thorough, and it is widely used in actual sewage treatment.

[0003] The catalyst can effectively improve the efficiency of ozone catalytic oxidation to degrade organic matter a...