20 results about "Peroxymonosulfuric acid" patented technology

The application discloses an electrode material based on MOF@COF / BC and application thereof in wastewater treatment and belongs to the technical field of wastewater treatment. The electrode material is prepared by the following method: NH2-MIL101(Fe), melamine and phthalocyanine molybdenum are dissolved in dimethyl sulfoxide, reaction is carried out at 160-200 DEG C for 10-14 h, the precipitate is collected after reaction, and washing, drying are carried out to prepare NH2-MIL101(Fe)@Mel-MoPc; the biochar and NH2-MIL101(Fe)@Mel-MoPc are mixed in deionized water, ultrasonic treatment is carried out for 8-12 min, stirring is carried out for 10-14 h, then the precipitate is collected by centrifugation, and washing, drying are carried out to prepare the electrode material. The application develops and designs a novel electrode material, which is used for electrocatalytic activation of peroxymonosulfate to degrade OFX wastewater, and the degradation efficiency of the OFX wastewater is greatly improved.

This invention provides a method for the degradation of bisphenol A (BPA) by persulfate activated by tea residue and iron filings. The method includes: freeze-drying and pulverizing tea residue to obtain coarse tea residue powder; sieving the coarse tea residue powder to obtain tea residue powder; mixing the tea residue powder with iron-containing substances to obtain an iron-containing tea residue mixture; adding the iron-containing tea residue mixture to a solution containing persulfate and BPA to initiate a chemical reaction; and measuring the BPA content to obtain the measurement results. This invention utilizes tea residue to replace pure tea polyphenols, constructing a persulfate degradation system activated by tea residue and iron filings, achieving a high-efficiency removal of 93.7% of BPA. This not only maintains the complexation and reduction advantages of tea polyphenols but also realizes the resource utilization of waste. It provides a low-cost, green, and sustainable technical path for BPA pollution control, with significant environmental and economic benefits.

An oxygen-enriched vacancy MoO 3‑x @MoS2 heterojunction catalyst and preparation method thereof and application thereof in removing sulfadiazine in water body The heterojunction catalyst takes molybdenum oxide (MoO 3‑x ) as a base material, and MoS2 is in-situ grown on MoO 3‑x , and the mass fraction of MoS2 in the heterojunction catalyst is 10-25%. The catalytic material adopted in the application promotes the transfer of charges through the formation of a heterojunction and surface oxygen vacancies, thereby realizing excellent sulfadiazine removal performance. The oxygen-enriched vacancy MoO 3‑x @MoS2 heterojunction catalyst photocatalytic activation of peroxymonosulfate for removing sulfadiazine in water body has the advantages of simple operation, low cost, wide pH application range, strong anti-interference ability, stable catalytic performance, high sulfadiazine removal efficiency, etc., and has a good application prospect for sulfadiazine wastewater treatment.

This invention discloses a method and system for the synergistic degradation of COD and new pollutants in industrial wastewater based on catalytic reduction-oxidation. The method includes: adjusting the pH of dyeing and printing wastewater containing perfluorinated compounds (PFCs) to alkaline; adding a reducing agent (sulfite) and a catalyst (alkali metal iodide); then carrying out a catalytic reaction under ultraviolet light irradiation and stirring; adding an oxidizing agent (persulfate PMS) and a catalyst (ferrous sulfate) to the effluent after catalytic reduction; and carrying out a catalytic oxidation reaction under light-proof and stirring conditions. The ferrous sulfate activates the PMS to generate sulfate radicals, completely mineralizing the short-chain fluorine-containing intermediates generated in the reduction stage into CO2 and F. ‑ Simultaneously, it degrades residual organic matter. The method of this invention can efficiently and thoroughly degrade perfluorinated compounds in actual dyeing and printing wastewater, and has strong anti-interference ability, low operating cost, and no secondary pollution.

The application discloses a bubble-assisted benzalkonium chloride heterogeneous Fenton-like catalytic degradation method and belongs to the technical field of water treatment in environmental engineering. The method uses ferric nitrate, cobalt chloride, lanthanum nitrate and biochar as raw materials, synthesizes BC / LaFeCo-LDH through a hydrothermal method, uses the BC / LaFeCo-LDH as a heterogeneous Fenton-like catalyst, and is used for activating peroxymonosulfate. Meanwhile, a solid-liquid-gas heterogeneous Fenton-like catalytic system is constructed in combination with a hydrodynamic cavitation reactor. In the system, the exposure degree of benzalkonium chloride is increased by virtue of the bidirectional action of hydrophobic bubbles and the surface of hydrophilic catalysts, the activation rate of peroxymonosulfate is significantly improved, a large amount of singlet oxygen is generated, and the degradation efficiency and reaction rate of benzalkonium chloride are effectively improved. The method provides an effective way for green and efficient degradation of benzalkonium chloride.

In traditional biochar production, most catalysts are difficult to recycle because they are in powder form. In this invention, biochar has been converted into magnetic biochar, which can be easily separated using a magnet, thereby increasing its recyclability. Magnetic biochar can be easily separated from the solution, which not only significantly improves its recyclability but also prevents secondary pollution in the water body. The purpose of this invention is to produce magnetic biochar from pea shells using the hydrothermal method and to present the method involved. This invention introduces the processing of biochar obtained from biomass sources in our country using the hydrothermal process to impart different physical and chemical properties. In this process, pea shells were processed under specific temperature and pressure conditions to obtain biochar. Its activation with peroxymonosulfate was demonstrated for use as a catalyst material in water purification.

This document discloses oral care compositions, and in particular, oral care compositions providing a whitening effect. According to some aspects, an oral care composition is provided comprising: a whitening agent containing persulfate; one or more thickeners containing fatty stearates and / or their acids; and about 5 to about 35% by weight of an abrasive selected from dicalcium phosphate, calcium carbonate, calcium bicarbonate, silica abrasives, and combinations of two or more thereof, wherein all weight percentages are based on the total weight of the oral care composition.

The application provides a treatment method of sulfur-containing waste lye, which comprises the following steps: carrying out oil removal treatment on the waste lye, and then carrying out first-stage wet oxidation treatment; controlling reaction conditions to make 10%-90% of S 2‑ in the waste lye be converted into S2O3 2‑ ; adding a co-oxidation promoter into effluent water to carry out catalytic wet oxidation treatment, so as to realize synchronous oxidation of organic matters and S 2‑ , and the co-oxidation promoter is at least one selected from peroxide, persulfate, percarbonate and peroxymonosulfate. The application adopts two-stage wet oxidation, and the temperature of each stage is relatively low. By controlling the conditions of the first-stage wet oxidation, 10%-90% of S 2‑ in the waste lye is converted into S2O3 2‑ , and by adding a co-oxidation promoter into the second-stage wet oxidation, S2O3 2‑ reacts to generate free radicals which can accelerate the wet oxidation, so as to accelerate the degradation of the organic matters, and the purpose of treating waste with waste is realized. The reaction conditions of the two-stage wet oxidation are relatively mild, the energy consumption is reduced, and the COD removal efficiency is greatly improved.

This invention discloses an anodic functional material and its preparation method, belonging to the fields of advanced oxidation technology and water treatment. The anodic functional material uses nickel foam as a substrate, on which vertically aligned reduced graphene oxide (rGO) and an ordered array of hexagonal Co3S4 nanosheets are sequentially loaded, forming an rGO@Co3S4-NF composite structure. Under the assistance of an electric field, this anodic functional material can efficiently activate negatively charged permonosulfate (PMS), significantly promoting the oxidation of free radicals. 1 The conversion of O2 can be used for the efficient degradation and removal of pollutants such as tetracycline. Moreover, it can maintain stable and efficient degradation performance in a wide pH range (3-11) and high salinity environment, providing a new strategy for efficient water treatment.

This invention discloses a cellulose-based composite bead for activating persulfate to degrade dyes and its preparation method, belonging to the field of water environmental protection. The preparation method includes: 1) preparing rough spherical CuMnO2; 2) preparing a CS-Ca@PEI / CuMnO2 composite bead catalyst; 3) mixing the obtained CS-Ca@PEI / CuMnO2 composite bead catalyst with persulfate and adding it to dye wastewater to degrade the dye wastewater. The catalyst preparation of this invention is simple, uses environmentally friendly biomass as the catalyst carrier, effectively improves the recovery efficiency of powdered catalytic materials, and the synthesized catalyst can efficiently degrade azo dyes, especially Congo red dye.

This invention provides a method for preparing a two-dimensional heterostructure catalytic material (Fe / Cu-TCPP / S-CN) composed of a self-assembled iron-copper bimetallic porphyrin hydrogen-bonded organic framework and carbon nitride, and its application in photocatalytic synergistic activation of persulfate (PMS) for the degradation of bisphenol A (BPA), belonging to the field of environmental pollution control technology. The material uses urea and melamine as precursors, and prepares a carbon nitride support with abundant nitrogen sites and a high specific surface area through mechanical mixing and high-temperature calcination. Furthermore, an iron-copper bimetallic porphyrin is stably anchored to the carbon nitride surface in the form of a hydrogen-bonded framework through a self-assembly strategy. Structural characterization shows that iron and copper atoms are highly dispersed atomically within the porphyrin ring, forming a unique two-site coordination structure. This configuration not only enhances the electronic coupling between the metal and the support, but also constructs a superlattice interface with significant quantum confinement effects through π–π stacking and van der Waals interactions, effectively promoting the spatial separation and directional migration of photogenerated carriers, providing an ideal electron transport channel for PMS activation. This study successfully developed a highly efficient oxidation system dominated by singlet oxygen through the rational design of a heterostructure of an iron-copper bimetallic porphyrin hydrogen-bonded organic framework and carbon nitride. This material exhibits excellent and stable pollutant degradation performance under a wide pH range (especially in alkaline environments), providing a new material platform and theoretical basis for developing advanced oxidation technologies suitable for complex real-world water bodies.

This invention relates to the field of environmental pollution control and functional materials technology, and discloses an LDH@MIL-Fe core-shell composite material, its preparation method, and its application. The LDH@MIL-Fe core-shell composite material uses LDH as the core and MIL-Fe as the shell; the general formula of LDH is [M... 2+ 1‑x M 3+ x (OH)2] x+ (A n‑ ) x / n •mH2O; the MIL-Fe is Fe 3+ The MIL-Fe core serves as the metal center, and its organic ligands are one or more of terephthalic acid, trimesic acid, 2-aminoterephthalic acid, and fumaric acid. This invention constructs an LDH@MIL-Fe core-shell composite material, forming a heterogeneous structure with LDH as the core and MIL-Fe as the shell, achieving interfacial synergistic effects between LDH and MIL-Fe. Through the synergistic effect of photocatalysis and persulfate activation, it achieves highly efficient degradation of organic pollutants and exhibits good stability and recyclability. Even after multiple cycles, the material maintains a high degradation efficiency.

The application discloses a preparation method of lignin sulfonate and application of the lignin sulfonate in high-temperature dyeing of polyester, and belongs to the technical field of dye dispersants. The preparation method is as follows: SBA-15 after alkali etching is immersed in a precursor solution, and is subjected to aging, drying and calcination treatment; the obtained metal-loaded SBA-15 is immersed in a 3-mercaptopropyltrimethoxysilane toluene solution, and tetraethyl orthosilicate is added to perform a reaction, so as to obtain a silanization modification catalyst; the silanization modification catalyst is oxidized through a peroxymonosulfuric acid aqueous solution, so as to obtain a Mn-Cu@SO3H / SiO2 catalyst; lignin is added into deionized water, polyformaldehyde and the Mn-Cu@SO3H / SiO2 catalyst are added to perform a reaction, and sodium sulfite is added to perform a reaction, so as to obtain the lignin sulfonate. The prepared lignin sulfonate has excellent high-temperature dispersion stability, low fiber staining and high dispersing force characteristics, and can be applied to high-temperature dyeing of polyester fabrics.

The application provides a paint residue derived activated carbon coated cobalt nanomaterial and a preparation method and application thereof, the preparation method in the application uses solid hazardous waste paint residue as raw material, and adsorbs metal cobalt ions on the paint residue; the cobalt ion-paint residue compound is calcined and pyrolyzed, a magnetic Co-AC catalyst is obtained, and the catalyst is applied to catalytic activation of peroxymonosulfate to degrade new organic pollutants in water. The paint residue derived activated carbon coated cobalt nanomaterial in the application can be used as a green and efficient heterogeneous Fenton-like catalyst, peroxymonosulfate is activated through a non-free radical pathway, and the catalyst is easy to separate and reuse under an external magnetic field.

This invention discloses a persulfate liquid activator, its preparation method, and its application. The method includes: performing a primary solid-liquid separation on excess activated sludge and collecting the liquid phase; adjusting the pH of the liquid phase to 3.0–4.0 using an inorganic acid and stirring at 10–40 °C for 10–60 min; adding polyaluminum chloride to the treated liquid phase, stirring, and then allowing it to settle to form a flocculent sedimentation system; subsequently performing a secondary solid-liquid separation and collecting the supernatant or filtrate to obtain the persulfate liquid activator. This invention selectively regulates the components of the excess activated sludge liquid phase, reducing the content of humic components, aromatic macromolecular organic components, and colloidal components while retaining dissolved transition metal ions and small molecule dissolved organic components that are beneficial for persulfate activation. The process conditions are mild, the flow is simple, and it is conducive to the resource utilization of the excess activated sludge liquid phase.