10 results about "Fenton reagent" patented technology

The present application relates to sewage treatment technical field, especially to a kind of sewage treatment method and sewage treatment system based on upflow stirring mode high-efficiency saving reagent for effluent after biochemical treatment, utilize packing in system large circulation and carry out pollutant enrichment, improve local pollutant concentration, promote the chain reaction of advanced oxidation;Using ferrous sulfate pre-adding method improves local ferrous concentration, enhances ferrous catalytic ability, promotes reagent mixing by upflow mixing method, reduces waste reagent caused by effluent hydrogen peroxide residue, while treating the pollutant adsorbed by packing, regenerate packing, finally achieve the purpose of reducing fenton reagent dosage, suitable for treating various biochemical tail water.

This invention proposes a Fenton reagent, a polishing slurry, a polishing method for diamond substrates, and a diamond polishing sheet. The invention provides a Fenton reagent comprising a hydrogen peroxide solution and a ferrous salt-containing composition; the ferrous salt-containing composition comprises: a ferrous salt, a host molecule, and a guest molecule; the host molecule has a hydrophobic cavity structure, capable of encapsulating the guest molecule through non-covalent interactions, and exhibits chemical stability in the Fenton reaction system; the guest molecule has a conjugated π system and can coordinate with Fe. Using the Fenton reagent and abrasive particles of this invention as a polishing slurry, diamond is polished under visible light irradiation, ensuring that the Fe content in the polishing slurry is maintained. 2+ A stable concentration ensures a stable supply of hydroxyl radicals, resulting in a high-quality diamond surface.

The present disclosure relates to a metal-containing ZSM-5 molecular sieve and a preparation method and application thereof, the method comprising: S1, mixing a silicon source, an aluminum source, an alkali source, seeds and water to obtain a first mixture; S2, mixing an active metal source, a peroxide, water and the first mixture and then performing a hydrothermal reaction; wherein the peroxide is selected from one or more of sodium persulfate, hydrogen peroxide and Fenton reagent; and the metal in the active metal source is one or more of nickel, copper, zinc, manganese, lanthanum and cerium. The method of the present disclosure uses a peroxide to synthesize a molecular sieve without using a template containing amine nitrogen, thereby avoiding amine nitrogen wastewater discharge, achieving clean production of the metal-containing ZSM-5 molecular sieve, and enabling preparation of a ZSM-5 molecular sieve having an active metal component distributed in the molecular sieve channel, which, when used in a diesel catalytic cracking reaction, has a relatively optimal yield of low-carbon olefins.

The application discloses an inorganic shielding agent for eliminating the influence of residual flocculants in machine-made sand on the workability of concrete and an application method thereof. The inorganic shielding agent is composed of hydrogen peroxide and ferrous salt. In the mixing process of concrete or mortar, the shielding agent is added into mixing water, polycarboxylic acid water reducing agent and other raw materials, and hydroxyl radicals generated by Fenton reagent are used to rapidly degrade residual polyacrylamide (PAM) in machine-made sand by using the mixing and time provided by the mixing process, so that the competitive adsorption and tackifying effect of the residual PAM on the polycarboxylic acid water reducing agent are eliminated, and the workability of the concrete is restored. The application has the advantages of high efficiency, rapidness, low cost and simple operation, and the reaction product is harmless to the environment, and is suitable for large-scale industrial application.

The present disclosure relates to a kind of iron-containing ZSM-5 molecular sieve and its preparation method and application, the method comprises: S1, silicon source, aluminum source, alkali source, seed crystal and water are mixed to obtain first mixture;S2, after iron source, peroxide, water and the first mixture are mixed, hydrothermal reaction is carried out;Wherein, the peroxide is selected from one or several of sodium persulfate, hydrogen peroxide and Fenton reagent.The method of the present disclosure does not use amine nitrogen organic matter and amine nitrogen ligand, and iron component is encapsulated by peroxide, which avoids amine nitrogen wastewater discharge, so as to realize the clean production of encapsulated iron ZSM-5 molecular sieve.

Methods of detecting the presence of one or more fluorinated compounds, including perfluoroalkyl or polyfluoroalkyl substance (PFAS), in a sample are provided. The methods include the steps of chemically treating a sample with an oxidizing agent, such as a persulfate solution or Fenton's reagent, collecting the fluorinated compounds, and detecting the fluorinated compounds using analytical methods.

The present disclosure relates to a ZSM-5 molecular sieve containing iron small crystal grains and a preparation method and application thereof, the method comprising: S1, mixing a silicon source, an aluminum source, an alkali source, seeds, a template agent and water to obtain a first mixture; S2, mixing an iron source, a peroxide, water and the first mixture and then performing a hydrothermal reaction; wherein the peroxide is selected from one or more of sodium persulfate, hydrogen peroxide and a Fenton reagent. The method of the present disclosure can prepare a ZSM-5 molecular sieve containing iron small crystal grains with a small crystal grain size, which is used in a light hydrocarbon catalytic cracking reaction and has a relatively optimal yield of low-carbon olefins.

The invention relates to the technical field of novel environment-friendly materials, and particularly discloses preparation and catalytic degradation application of metal ion doped zinc ferrite, metal ions are doped into zinc ferrite, and the catalytic performance and magnetism of pure-phase zinc ferrite are remarkably improved. The modified zinc ferrite has a very good catalytic effect on the catalytic reaction process of oxidizing agents such as persulfate, hydrogen peroxide and a Fenton reagent under the condition of no illumination, and has a very good catalytic effect on antibiotics and organic dyes (with the concentration of 1t; 100 mg / L) and the like, and the catalytic degradation rate gt of degradation-resistant organic pollutants is obtained; the magnetic separation efficiency is more than or equal to 95%, and the catalyst can be recycled for more than or equal to 20 times. The method can realize simple, convenient and green modification of zinc ferrite and high-effect degradation and removal of various organic pollutants, in addition, the metal ion doped zinc ferrite can efficiently magnetically separate and pit inorganic salts, is suitable for treating various industrial refractory enterprise sewage, is low in operation cost, reduces the cost and improves the efficiency, and meets the industrial production requirements.

The utility model discloses a novel advanced oxidation reaction device for treating nitrobenzene wastewater, which comprises a reaction tank, a guide cylinder arranged at the center of the reaction tank, iron-carbon filler filled in the guide cylinder, and a grating plate arranged at the bottom of the guide cylinder; ultraviolet lamp groups which are vertically mounted are uniformly arranged between the guide cylinder and the reaction tank, the ultraviolet lamp groups are connected with an external control system, and a water inlet pipeline is arranged on the guide cylinder; a water inlet is formed outside the upper edge of the reaction tank and is connected with the guide cylinder through a water inlet pipeline; a water outlet groove and a water outlet weir plate are arranged along the periphery in the upper edge of the reaction tank; a water outlet is formed in the water outlet groove; aerators are uniformly arranged at the bottom of the reaction tank; a sludge discharge pipe is arranged at the bottom of the reaction tank; and a pH analyzer, an ORP online analyzer and a dosing pipeline are arranged at the upper part of the reaction tank. When the device is used for treating nitrobenzene wastewater, the dosage of a Fenton reagent can be reduced, secondary pollution is reduced, hardening and passivation of iron-carbon filler are avoided, automatic control can be realized, and labor is reduced.

The application discloses a non-membrane combined advanced oxidation landfill leachate treatment system. In the application, a non-membrane landfill leachate treatment process is obtained by optimizing combination of a physical and chemical method and an advanced oxidation method, the treatment efficiency of the leachate is high, the effluent water quality is stable and up to the standard, there is no membrane concentrated liquid disposal problem, the operation cost is reduced, less wearing parts are used, and the later maintenance and management are convenient. The aerobic short-term nitrification and denitrification, Fenton-iron carbon micro-electrolysis and denitrification advanced nitrogen removal process are combined, the iron carbon micro-electrolysis is used in the front section to reduce nitrite nitrogen into nitrogen, the Fenton reagent is added in the iron carbon micro-electrolysis process, nitrite and organic matter are further oxidized, residual nitrite nitrogen is converted into nitrate nitrogen, is removed through the rear section denitrification process, the ozone advanced oxidation reflux liquid can provide the carbon source for the denitrification process, the denitrification efficiency is high, and the biological treatment process can always maintain high efficiency.