21 results about "Green rust" patented technology

The invention belongs to the field of water treatment, and relates to a method for removing copper ions in water by combining phosphorylated micron iron and green rust. The method comprises the following steps: adding phosphorylated micron iron and green rust into to-be-treated water containing copper ions, and carrying out stirring reaction to remove the copper ions. According to the method, the phosphorylated micron zero-valent iron can efficiently remove the bivalent copper ions in the water within a short time under the synergistic effect of the green rust, the method is a novel water treatment method for removing the copper ions in the water, a new method is provided for water pollution treatment, and the method has important significance on water pollution treatment.

The invention belongs to the technical field of anticorrosive coatings for metal equipment, and discloses a rust transforming agent, a green rust-free macromolecular anticorrosive coating and a method. The rust remover comprises the following components in parts by weight: 5-15 parts of a rust conversion agent, 60-80 parts of a film-forming agent, 0.5-5 parts of a curing agent, 10-20 parts of a diluent, 1-5 parts of a defoaming agent and 0.005-0.05 part of a catalyst. According to the product, the site construction requirement is greatly reduced, the working efficiency is improved, and the cost is saved.

The present disclosure relates to double layered hydroxide-type compounds comprising both di- and tri-valent nickel ions, and the use of such compounds in electrodes for energy storage device in addition to a previously developed electrode using Fe2+ and Fe3+“green rusts related compounds”.

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 provides a nickel ion-doped carbonate patina material as well as a preparation method and application thereof, and relates to the technical field of clean energy manufacturing. The preparation method of the nickel ion-doped carbonate patina material comprises the following steps: S1, mixing a divalent iron source, a trivalent iron source and a divalent nickel source under an anaerobic condition to obtain a mixed solution; s2, alkali liquor is added into the mixed liquor obtained in the step S1, and turbid liquid of the nickel ion-doped carbonate green rust material is obtained after stirring and aging reaction; and S3, carrying out centrifugal separation on the turbid liquid of the nickel ion-doped carbonate patina material obtained in the step S2. A divalent iron source, a trivalent iron source and a divalent nickel source are used as raw materials, nickel ions are doped into carbonate patina material crystals by adopting a coprecipitation method, and the carbonate patina material is improved, so that a material with high hydrogen production capacity by oxidizing and reducing water is obtained.

The present invention discloses a method for separating low-conductivity phosphorus-containing wastewater by electrochemically generating Fe-Ca green rust in situ, which comprises the following three steps: electrochemically generating Fe-Ca green rust flocs in situ, capturing phosphorus in situ by the flocs, and controlling the release of phosphorus from the flocs for separation and recovery. 2+ Phosphorus in low-conductivity wastewater is captured ex situ by generating Fe-Ca green rust flocs. The Fe-Ca green rust flocs are produced in large quantities, have high stability, and a capture rate of over 93.4%. The captured phosphorus is released and recycled through the transformation of the Fe-Ca green rust floc structure, with a recovery rate of over 76.78%. During the floc generation stage, the electrode plates do not come into contact with the wastewater, avoiding electrode passivation and facilitating the generation of flocs. Compared with the electrochemical method, the capture rate is high and the energy consumption is low for treating the same wastewater, which greatly reduces the cost of treating low-conductivity wastewater.

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 relates to the field of wastewater treatment devices, in particular to an efficient decoloration industrial wastewater pretreatment coagulation device which comprises a primary coagulation area, a primary settling area, a deoxidizing area, a secondary coagulation area and a secondary settling area which are connected in sequence, wherein the primary coagulation zone is provided with a first coagulant adding device and a first pH regulator adding device; the deoxidizing area is provided with a deoxidant adding device; the second-stage coagulation zone is provided with a second coagulant adding device and a second pH regulator adding device, the first-stage coagulation zone mainly aims at suspended solids and part of dissolved organic matters, and charge neutralization and bridging effects are realized by utilizing a polynuclear complex formed by hydrolyzing Fe < 3 + > ions. And the second-stage coagulation focuses on solving the problems of refractory organic matters and chromaticity, and deep treatment is realized through formation of green rust. The strategy of step-by-step treatment not only improves the overall treatment efficiency, but also optimizes the reaction conditions of each stage by regulating and controlling the pH value.

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 invention relates to a modified rice husk-based charcoal loaded sulfate patina composite material as well as a preparation method and application thereof. Under an anaerobic condition, ferric sulfate and ferrous sulfate heptahydrate are subjected to a series of chemical reactions under an alkaline condition to generate a sulfate green rust material; and then loading the prepared sulfate patina to the modified rice husk-based biochar to obtain the modified rice husk-based biochar loaded sulfate patina composite material. In the primary stage of anaerobic digestion of the medium-temperature high-solid-content sludge, a certain amount of the modified rice husk-based charcoal loaded sulfate patina composite material is added into a medium-temperature anaerobic digestion device, the anaerobic digestion efficiency of the high-solid-content sludge is remarkably improved, and the methane content in the generated biogas is remarkably increased; meanwhile, the ecological toxicity of arsenic in the digested sludge is remarkably reduced, and land resource utilization of the sludge is facilitated.

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.

The present invention relates to the technical field of arsenic pollution remediation, and discloses an arsenic pollution remediation material and its application. An arsenic pollution remediation material comprises green rust and calcium peroxide. The arsenic pollution remediation material comprising green rust and calcium peroxide provided by the present invention, calcium peroxide can gradually release oxygen and hydrogen peroxide in water, a large amount of active ferrous iron contained in the green rust can catalyze oxygen and hydrogen peroxide to produce a large amount of active oxygen, thereby oxidizing trivalent arsenic, and the secondary iron minerals produced after the oxidation of ferrous iron can efficiently adsorb and fix arsenic, and when green rust and calcium peroxide are used in combination at a molar ratio of 1: (0.2-1), efficient oxidation and fixation of trivalent arsenic can be achieved. The arsenic pollution remediation material can be applied to the oxidation and fixation of trivalent arsenic in water and soil, and promote the remediation of arsenic-contaminated water and soil.

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 systems and methods convert methane to one or more products using a green rust material in spontaneous, electrocatalytic, and photochemical reactions under aerobic and anaerobic conditions. In an embodiment, a first electrode that includes a green rust material and a second electrode are contacted by an electrolyte, where the first and second electrodes are separated by an ion exchange membrane. For electrocatalytic reactions, a potential difference is applied across the electrodes. For photochemical reactions, the green rust material is illuminated. Liquid products (e.g., methanol and / or acetate) can be removed from the electrolyte in contact with the green rust material after the desired contact period.

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.