Method for treating adsorbent saturated powdered activated carbon by advanced oxidation technology

Abstract

The invention discloses a method for treating adsorbent saturated powdered activated carbon by an advanced oxidation technology. The method comprises the following steps that 1) the adsorbent saturated powdered activated carbon is ultrasonically shaken, centrifuged and flushed with deionized water to obtain solid activated carbon, and then the solid matter activated carbon is dried; 2) 15 parts ofthe dried activated carbon and 120 parts of hydrogen peroxide are mixed and fully stirred to obtain a mixed solution A; 40 parts of ferrous sulfate and 200 parts of distilled water are taken, mixed and stirred evenly to obtain a mixed solution B, and the mixed solution B is dropwise added to the mixed solution A to obtain a mixed solution C; 3) ozone is slowly and continuously introduced into themixed solution C, ultrasonic shaking is conducted while the ozone is introduced, and then a reaction continues for 8 hours; 4) the mixed solution C is subjected to standing and suction filtration, and the obtained solid matter is ultrasonically dispersed, washed with deionized water to be neutral and then dried. The adsorption capacity of the powdered activated carbon treated by the method can reach 80% or above of the original activated carbon, the regeneration rate is 90%, after the regeneration process is carried out five times, the adsorption capacity has no obvious loss, and the strengthof the powdered activated carbon remains basically unchanged.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for treating adsorbed saturated powdery activated carbon with advanced oxidation technology. Background technique [0002] Advanced oxidation technology is a method of decomposing organic matter through the hydroxyl radicals generated by the catalyst and the strong oxidative properties of the hydroxyl radicals. This technique is usually used to deal with macromolecules, refractory and poorly biodegradable organic substances. The advanced oxidation method can directly mineralize the above-mentioned organic matter to improve its biodegradability. Advanced oxidation technology can completely mineralize or decompose most of the organic substances, so it has great advantages in dealing with low-concentration and high-risk organic substances such as environmental hormones. Activated carbon is a commonly used adsorption material, and its large spe...

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Problems solved by technology

This method is simple and easy to implement and has low technical requirements, but it requires high equipment, and the investment cost of building a set of activated carbon heat treatment regeneration equipment is relatively high. In addition, there are still many unsolvable problems in heat treatment regeneration, such as: Molecular organic matter, the treatment effect is not good; the regeneration process is non-selective, and it cannot be treated for a special substance; it cannot be effectively desorbed for low-concentration and high-hazard organic matter; there are strict requirements for temperature control, otherwise it will lead to changes in the structure of activated carbon, Loss of its original activity, but the temperature is too low to effectively regenerate activated carbon