4results about How to "Efficient oxidative degradation" patented technology

The invention relates to the technical field of sewage treatment, in particular to a water treatment method based on non-free radical oxidation. The water treatment method comprises the following steps: adding soluble carbonate into sewage containing calcium ions to obtain calcium carbonate crystals, and then introducing ozone to oxidize the sewage to obtain purified water. According to the water treatment method provided by the invention, calcium carbonate can be generated in situ in the sewage, ozone is catalyzed by the calcium carbonate to be decomposed on the surface of the sewage to generate high-activity atomic oxygen, and efficient oxidative degradation of pollutants is realized through a direct electron transfer mechanism between the atomic oxygen and organic pollutant molecules. The method breaks through the limitation of a traditional free radical path, avoids the problem of hydroxyl free radical quenching, has the advantages of high catalytic efficiency, good stability, environmental friendliness and no need of additional addition of a catalyst carrier, can realize efficient removal of calcium ions in sewage, and can be widely applied to water treatment and deep treatment of refractory organic wastewater.

The application belongs to the technical field of water treatment, and provides an electro-catalytic periodate synergistic wastewater treatment method and device. The wastewater treatment method comprises the following steps: adding organic contaminant-containing wastewater to be treated into a wastewater treatment device provided with an anode plate and a cathode plate, adding periodate into the wastewater treatment device, starting a direct current power source connected with the anode plate and the cathode plate to perform wastewater treatment, and discharging the treated wastewater; the material of the anode plate is ruthenium oxide-iridium oxide, and the material of the cathode plate is carbon felt; in the wastewater treatment process, the organic contaminant is oxidized and degraded by direct electron transfer on the anode plate, and electro-catalytic oxidation is synergized with periodate to produce active species including OH · , 1 O2,O2 ·‑ ,H2O2,IO3 · and H2O2, IO3- and H2O2, which oxidize and degrade the organic contaminant in the wastewater, and the cathode plate removes part of the contaminant in the wastewater through adsorption. The application can realize efficient and low-cost treatment of wastewater containing refractory organic matter.

The invention discloses a ferrous silicate catalytic material as well as a preparation method and application thereof, and belongs to the technical field of catalytic materials. The preparation method comprises the following steps: slowly adding a sodium silicate solution into a ferrous sulfate solution at a constant speed, stirring and reacting under a proper pH condition, filtering, washing and drying a reaction product to obtain the ferrous silicate catalytic material, and the obtained ferrous silicate catalytic material has the characteristics of an amorphous crystal phase structure, nano-particle morphology and positive charge on the surface. The adsorbent not only has high adsorption activity on anionic organic pollutants, but also can catalyze peroxides to oxidize and degrade the organic pollutants, so that the degradation rate of the organic pollutants is improved.

This invention relates to a selenium-iron-copper composite catalyst material, its preparation method, and its applications in the field of materials chemistry. The catalyst uses ferric oxide as a matrix, with selenium powder, iron powder, and copper powder added as active components, and polyol and carboxylic acid as auxiliary agents. The process involves premixing, calcination, and pulverization. The selenium powder content is 1-7 wt% of ferric oxide, the iron powder content is 2-10 wt%, and the copper powder content is 0.5-1.5 wt%. The preferred polyol is glycerol, and the preferred carboxylic acid is crotonic acid. The calcination temperature is 400-800℃. In catalytic testing, under room temperature and air bubbling conditions, this catalyst can achieve a degradation rate of over 90% for tetracycline hydrochloride within one hour. This invention features a simple preparation method, low cost, high catalytic activity, mild operating conditions, and efficient degradation of tetracycline in water, making it suitable for antibiotic wastewater treatment.