12 results about "Green rust" patented technology

To provide a method for producing a new ferrite quantum dot different from a conventional one.SOLUTION: A method for producing ferrite quantum dots, the method comprising the steps of preparing a mixed solution in which at least ferrous hydroxide is present in water at 0 °C or higher and 30 °C or lower, preparing a green rust-containing suspension by oxidizing the mixed solution to form green rust crystals in the mixed solution, synthesizing ferrite quantum dots in the suspension by raising the temperature of the suspension to 50 °C or higher and 100 °C or lower in an oxygen-free stream, and collecting the ferrite quantum dots in the suspension.SELECTED DRAWING: None

The invention discloses a method for removing anions in soil and underground water through electrokinetic remediation-in-situ electrochemical green rust production adsorption coupling. An electrokinetic remediation unit and an electric flocculation unit located on a device are included. According to the electrokinetic remediation-electric flocculation coupling, a periodic square wave power supply is adopted to control two units to work alternately, and a square wave periodic power supply mode with different duty ratios of EC and EK is adopted, so that the removal efficiency of anions is improved, and the energy consumption of working units is reduced; the anode of the electric flocculation unit is doped with magnesium and zinc, Fe < 2 + > electrolysis is promoted, the green rust yield and stability are improved, and the efficiency of capturing and removing anions is further promoted; the cathode of the electric flocculation unit has a high local pH value, precipitates or micro-precipitates are generated with cations generated by electrolysis to pre-capture anions, and the anions are deposited to the bottom of the electric flocculation unit to further promote the removal efficiency of the anions and provide a smooth path for subsequent migration and capture of the anions at the same time.

To provide a new method for producing quantum dots of an iron-containing sulfide different from a conventional one.SOLUTION: A method for producing quantum dots of an iron-containing sulfide includes a step of preparing a mixed solution in which at least ferrous hydroxide is present in water at 0 °C or higher and 30 °C or lower, a step of preparing a green rust-containing suspension by oxidizing the mixed solution to form green rust crystals in the mixed solution, and a step of raising the temperature of the suspension to 50 °C or higher and 100 °C or lower in an oxygen-free stream. A method for producing iron-containing sulfide quantum dots, the method comprising: synthesizing the ferrite quantum dots in the slurry; collecting the ferrite quantum dots in the slurry; and treating the ferrite quantum dots with hydrogen sulfide gas at 110 °C. or more and 150 °C. or less to substitute sulfide ions O2 - for oxide ions S2 - in the ferrite, thereby producing iron-containing sulfide quantum dots.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of environmental engineering and water ecological restoration, and particularly relates to a river subsurface zone printing and dyeing wastewater in-situ restoration system and method. A modified adsorption material-in-situ catalytic reaction-Internet of Things intelligent operation and maintenance-ecological collaborative adaptation integrated system is adopted, an olive pomace activated carbon-montmorillonite-nano titanium dioxide composite adsorption material is adopted, and the dye interception and degradation efficiency is improved by utilizing an interlayer pore structure and photocatalytic performance; through a nano zero-valent iron composite reaction layer, high-activity green rust is generated in situ under the condition that the pH value of HCO3 <-> is 8.5-10.0, the utilization rate of Fe < 2 + > is increased, and the green rust does not need to be added from an external source; a pressure-water quality-water level three-parameter Internet of Things monitoring module is integrated, and blockage early warning and self-adaptive regulation and control are realized through a cloud platform; a reed-acorus calamus mixed planting plant community is selected and matched with a functional flora of pseudomonas and sphingomonas, the microbial degradation and ecological carbon sequestration functions are enhanced, and in-situ remediation of the subsurface flow belt printing and dyeing wastewater is achieved through multi-aspect cooperation.

The invention discloses a normal-temperature bionic reductive dehalogenation suspension system and a preparation method and application thereof.The normal-temperature bionic reductive dehalogenation suspension system is formed by mixing nitrogen-rich biochar, patina and cobalt hydroxide according to the mass ratio of 1: (1-5): (0.8-3.8) in a water phase at the normal temperature, nitrogen functional groups in the nitrogen-rich biochar and cobalt hydroxide are utilized to synergistically construct a cobalamin-like structure, active hydrogen is generated and stabilized in situ, and the suspension system is obtained. The patina provides reducing iron species, participates in electron transfer, can form heterojunctions with cobalt hydroxide, and can also be directly adsorbed in a nitrogen structure of bone black, so that the reaction is efficiently carried out, the patina has enzyme-like catalysis characteristics, efficient reduction and dehalogenation of halogenated organic pollutants such as trichloroethylene are realized, the reaction conditions are mild, and the method is suitable for industrial production. Meanwhile, acetylene can be directionally converted into ethylene and ethane.

The application discloses a novel green reinforcing steel rust inhibitor, a preparation method and application thereof, and belongs to the technical field of corrosion and protection of metals. 2+ and Fe 3+ The application uses microalgae mixed solution as the reinforcing steel rust inhibitor, and the rust inhibitor has the advantages of wide source, low cost and green environmental protection. The microalgae component contains electronegative atoms such as N and O, can be combined with Fe 2+ and Fe 3+ , is adsorbed on the surface of reinforcing steel, participates in the formation of a passivation film to hinder the corrosion of reinforcing steel, and can prevent the invasion of corrosion medium such as chloride ions through electrostatic repulsion effect due to the negative electricity of the novel green rust inhibitor, so that the effect of hindering the corrosion of reinforcing steel is achieved.

The invention belongs to the technical field of environmental restoration and advanced oxidation, and particularly relates to a controllable active oxygen species manipulation method. According to the invention, the stabilized green rust is used as a structural activator, on the premise of maintaining a layered skeleton and oxygen deficiency, high-valence iron and active oxygen species are generated in situ and anchored, dissolution and quenching of the high-valence iron and the active oxygen species are inhibited, and slow release of peroxymonosulfate (PMS) oxidation capacity is realized. Besides, bicarbonate radicals can be added according to field conditions and requirements, a Fe-carbonate complex is formed by the bicarbonate radicals and surface Fe, the reaction energy barrier of high-grade oxide species is reduced, the apparent dynamic constant is increased by 1-2 orders of magnitude on the original basis, and controllable switching of high-grade oxidative degradation kinetics from slow to fast is achieved. The method is suitable for medium-and-long-term or emergency pollution repair of underground water and low-permeability media, and is also suitable for other advanced oxidation technology application scenes.

The application discloses a kind of steel ship high-pressure water jet rust removal surface with green rust conversion anticorrosion primer bottom integrated function coating and its preparation method and application, belong to steel structure metal material surface corrosion protection technical field.The coating is two-component normal temperature curing system, A component includes epoxy modified resin 50-65%, rust conversion composite agent 8-15% of organic acid and inorganic phosphate compound, anti-rust pigment filler 15-25% containing graphene oxide, B component is polyamide 650 curing agent, when A, B component mass ratio is 100:(12-18).The application realizes rust conversion time ≤30min, rust conversion rate ≥96% by the synergistic effect of rust conversion composite agent and anti-rust pigment filler, coating adhesion reaches 1 level, resistant to neutral salt spray 1200h, VOC content ≤550g / L.The coating can be directly coated on the rust surface after high-pressure water jet rust removal, without secondary rust removal, with primer and intermediate paint function, can greatly shorten construction period, suitable for steel ship and other marine steel structure as long-acting anticorrosion protection matched anticorrosion functional coating.

This invention provides a hydrolysis catalyst that exhibits excellent catalytic activity for hydrolysis reactions that produce hydrogen from metal borohydride salts and is chemically stable, a hydrolysis method for producing hydrolysis of metal borohydride salts in the presence of this hydrolysis catalyst, a method for producing hydrogen, and a catalyst material suitable for this hydrolysis catalyst. [Solution] A hydrolysis catalyst for a borohydride metal salt containing oxidation-resistant green rust, a hydrolysis method for producing hydrolysis of a borohydride metal salt in the presence of this hydrolysis catalyst, and a method for producing hydrogen, as well as a copper / oxidation-resistant green rust composite containing oxidation-resistant green rust and copper.

Provided is a method for producing quantum dots of an iron-containing sulfide, the method being characterized by having: a step for preparing a mixed solution in which at least ferrous hydroxide is present in 0-30°C water; a step for preparing a green rust-containing suspension by oxidizing the mixed solution to form green rust crystals in the mixed solution; a step for synthetizing quantum dots of the ferrite in the suspension by raising the temperature of the suspension to 50-100°C in an oxygen-free gas flow; a step for recovering the quantum dots of the ferrite in the suspension; and a step for treating the quantum dots of the ferrite with hydrogen sulfide gas at 110-150°C, thereby substituting the oxygen ions O2− of the ferrite with sulfide ions S2− and preparing quantum dots of an iron-containing sulfide.

[Problem] To provide a novel method of producing ferrite quantum dots that is different from conventional methods. [Solution] This method of producing ferrite quantum dots comprises: a step for preparing a mixed solution containing at least iron(II) hydroxide in water at 0°C to 30°C; a step for oxidizing the mixed solution to form green rust crystals in the mixed solution, thereby preparing a green rust-containing suspension; a step for raising the temperature of the suspension to at least 50°C but not over 100°C in an oxygen-free gas stream, thereby synthesizing the ferrite quantum dots in the suspension; and a step for recovering the ferrite quantum dots that are in the suspension.

The invention belongs to the technical field of soil remediation, and relates to a magnetic biochar composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: crushing and drying agricultural wastes, and heating and pyrolyzing in a protective atmosphere to obtain biochar; the preparation method comprises the following steps: oscillating biochar with an inorganic acid solution, washing with water until the biochar is neutral, and drying to obtain a low-ash carrier; adding a low-ash carrier into the ferric salt impregnation liquid, adding a reducing agent solution in a buffer environment, and reacting to generate a green rust type precursor; and heating and pyrolyzing the green rust type precursor in a mixed atmosphere of N2 and H2 to form the magnetic biochar composite material. The magnetic biochar composite material is of a heterojunction structure of Fe3O4 nanocrystals and zero-valent iron nanodots on the surfaces of the Fe3O4 nanocrystals. The magnetic biochar composite material is applied to polluted soil, the activated O2 activates the endogenous Fenton-like reaction of the soil, hydroxyl radicals are generated, and degradation of organic pollutants is promoted. And various problems of the existing biochar material in soil remediation are solved.