22 results about "Waste minimisation" patented technology

The invention provides a method for constructing an axial halogen coordination iron-based catalyst and application of the axial halogen coordination iron-based catalyst, and belongs to the technical field of catalytic materials and environmental pollution control. The preparation method comprises the following steps: introducing amino to the surface of a multi-walled carbon nanotube to obtain a modified multi-walled carbon nanotube; iron tetracarboxyl phthalocyanine and the modified multi-walled carbon nanotubes are subjected to covalent grafting through an amidation reaction, and a precursor is obtained; mixing the precursor with a halogen-containing solid source and a nitrogen source, and carrying out temperature programming and segmented pyrolysis in an inert gas atmosphere to obtain a pyrolysis product; and carrying out acid pickling on the pyrolysis product. The core of the preparation method disclosed by the invention lies in a multi-step collaborative strategy of molecular isolation, interface bridging, gas phase migration, fixed-point capture and coordination regulation, so that ultrahigh monatomic dispersity is realized, and unification of high density and high dispersity is ensured; meanwhile, the electronic structure of the iron center is effectively optimized, and excellent intrinsic activity is shown.

The application discloses a silicon-doped modified ZnSn(OH)6 photocatalyst and a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The preparation method comprises the following steps: (1) mixing Zn(Ac)2.2H2O solution, SnCl4.5H2O solution, NaOH solution, Na2SiO3.9H2O, methyl cellulose solution and distilled water to obtain a mixed solution; and (2) heating the mixed solution to synthesize the silicon-doped modified ZnSn(OH)6 photocatalyst. The product is prepared by using a hydrothermal synthesis method, the method can easily obtain a material with high crystallinity, the morphology and size of the material can be better controlled, the method is easy to operate, and the prepared silicon-doped modified photocatalyst has the characteristics of stable activity, fast carrier migration rate and high separation efficiency, and has excellent catalytic performance on methylbenzene volatile organic pollutants, and has a wide application prospect in the field of environmental pollution control.

This invention discloses a method for configuring oil and gas recovery facilities at coastal refined oil terminals adaptable to multiple operating conditions. It relates to the technical field of environmental pollution control, particularly air and water pollution control. Oil and gas pollution from terminals has a significant destructive impact on the environment. To protect the environment, terminals need to be equipped with oil and gas recovery facilities. This method first collects the basic operating parameters of the target terminal and the pipeline laying distance, and determines the spatial constraints. A multi-objective evaluation matrix is ​​constructed, and candidate scheme scores are calculated and ranked using a comprehensive evaluation model. Finally, the footprint of the optimal scheme is used, combined with the spatial constraints, to determine the physical boundaries. Based on the pipeline laying distance, selection parameters for the induced draft module used to overcome long-distance pressure drop are simultaneously output, generating spatial layout instructions that include physical arrangement and fluid compensation. This invention deeply couples process quantitative optimization with the physical space of the terminal, significantly reducing the overall operating energy consumption of the oil and gas recovery process and contributing to energy conservation and emission reduction in ports.

The invention belongs to the technical field of municipal sewage treatment and environmental pollution control, and particularly relates to a system and method for controlling harmful gas in a sewage pipeline based on nitrate coupled waste iron ore. According to the technical scheme, the system for controlling the harmful gas in the sewage pipeline based on coupling of the nitrate and the waste iron ore comprises a nitrate storage tank, a waste iron ore powder storage tank, a mixer and an adding device, the nitrate storage tank and the waste iron ore powder storage tank are connected with the mixer through pipelines, and the mixer is used for mixing chemicals; the mixer is used for adding chemicals into the sewage pipeline through an adding device. According to the system and the method for controlling the harmful gas in the sewage pipeline based on the coupling of the nitrate and the waste iron ore, through the coupling effect of the nitrate and the waste iron ore, the activity of anaerobic harmful flora is inhibited, the generation of H2S and CH4 is reduced, and the cyclic utilization of waste resources is realized.

The invention discloses a Fe / Cu-SAPO-11 adsorption carrier capable of adsorbing NH3 and resisting poisoning as well as a preparation method and application of the Fe / Cu-SAPO-11 adsorption carrier, and belongs to the field of environmental pollution control materials and technologies. The preparation method at least comprises the following steps: in the presence of a source containing aluminum, phosphorus and silicon, performing hydrothermal synthesis, calcining to obtain an SAPO-11 molecular sieve, and finally loading copper by an ion exchange method. And carrying out hydrothermal synthesis on iron oxide, and physically mixing the molecular sieve and the iron oxide to obtain the Fe / Cu-SAPO-11. The Fe / Cu-SAPO-11 prepared in the invention has a micron-scale spherical structure, and iron oxide loaded on the Fe / Cu-SAPO-11 has a regular hexagonal structure with a nano-scale size. Compared with the prior art, the method disclosed by the invention is simple to operate, easy for large-scale production, high in NH3 adsorption efficiency and good in sulfur resistance.

The invention discloses hydrotalcite-based Janus composite particles and a preparation method thereof, and belongs to the technical field of Janus materials. The snowman-shaped Janus particle is prepared by growing hydrotalcite on the surface of a polystyrene microsphere with a core-shell structure and extruding polystyrene by utilizing a seed swelling method. According to the method, hydrotalcite is prepared into particles with a Janus structure and characteristics, the process steps are simple, the structure is stable, and the method is suitable for large-scale preparation. The Janus material has structural asymmetry and amphipathy, has the functions of hydrotalcite and polymer, and has wide application prospects in the fields of emulsion catalysis, environmental pollution control and the like.

The invention belongs to the technical field related to water treatment, and particularly discloses a method for electrocatalytic enrichment of uranium by using zero-valent iron aerogel, and the method comprises the following steps: slicing hydrophilic carbon paper, and treating for later use; the preparation method comprises the following steps: dissolving zero-valent iron aerogel and an adhesive in an organic solvent, and performing ultrasonic dispersion to form uniform catalyst slurry; uniformly coating the surface of pretreated carbon paper with the obtained slurry in an oxygen-free environment, drying to obtain a zero-valent iron aerogel-loaded carbon paper working electrode, forming a three-electrode system by matching the prepared working electrode with a counter electrode and a reference electrode, and performing electrochemical reduction reaction on uranium-containing water in an electrolytic tank by applying pulse voltage to obtain uranium-containing water. Uranium is enriched in the working electrode. The zero-valent iron aerogel loaded electrode with high specific surface area and excellent electron conduction performance is constructed, the low-pulse voltage electro-catalysis technology is combined, efficient, high-selectivity and low-energy-consumption enrichment of uranium in seawater is achieved, and the dual functions of resource recovery and environmental pollution control are achieved.

The present application relates to the technical fields of environmental pollution control, and discloses an environmental pollution control device in liquid solidified soil backfill construction, which comprises a stirring drum, a bottom support seat fixedly connected to the bottom of the stirring drum, and side support frames fixedly connected to the two sides of the bottom support seat; the diffusion of dust and reagents generated during stirring is reduced through the blocking drum, improving the effect during stirring; dust suppression is performed by the sprayed liquid, the rotating side connecting rod drives the two atomizing nozzles to rotate along the top of the stirring drum, the rotating atomizing nozzle can expand the atomizing area of the liquid, improving the dust suppression effect of the atomizing nozzle; the inner wall of the blocking drum is brushed by the side cleaning brush, which can reduce the adhesion of more mixture on the inner wall of the blocking drum, improving the dust suppression effect; the mixture after dust suppression is separated, which facilitates subsequent treatment of the mixture generated during dust suppression and reduces the workload of the operator.

The invention provides a foam gel material as well as a preparation method and application thereof, and belongs to the technical field of environmental pollution control. The foam gel material provided by the invention is prepared from the following raw materials in percentage by mass: 0.2 to 0.4 percent of foaming agent, 0.4 to 0.6 percent of polymer foam stabilizer, 0.1 to 1.0 percent of sodium pyrosulfite, 0.01 to 0.02 percent of ferrous sulfate heptahydrate and the balance of water. Sodium pyrosulfite and ferrous sulfate heptahydrate are used as reducing agents and can reduce Cr (VI) into Cr (III), the generated Cr (III) and Fe < 3 + > (Fe < 2 + > oxidation products) are jointly subjected to cross-linking reaction with the polymer foam stabilizer, and a stable gel barrier structure is constructed in situ, so that the synergistic remediation effect of pollution blocking, structure curing and pollutant in-situ reduction is achieved; therefore, the repairing effect is improved.

The present application relates to a kind of cationic surfactant modified porous carbon material and preparation and application, belong to environmental pollution control technical field.The shell of agricultural biomass solid waste-hazelnut kernel is used as carbon precursor, and the porous carbon material for wastewater treatment is prepared by two-step pore-making-surface modification coupling technology.Potassium hydroxide solution is mixed with hazelnut shell powder after ultrasonic drying, to realize the intercalation reaction and uniform pre-etching of raw material in liquid strong alkali environment.Second, the obtained hazelnut shell-potassium hydroxide solid mixture is carbonized in situ, to obtain high specific surface area biomass porous carbon.Finally, the surface of porous carbon material is modified by loading cationic surfactant through polyethylene glycol grafting method, to enhance the adsorption performance of material.The obtained modified hazelnut shell porous carbon material has the characteristics of large specific surface area and low cost, can efficiently remove nanometer plastic and antibiotics in wastewater, and the removal rate can reach more than 98%, has good environmental application prospect.

The invention relates to the field of road engineering and environmental pollution control, in particular to a pavement-roadside synergistic purification method of a porous asphalt pavement surface layer, which remarkably improves the synergistic purification efficiency of suspended solids, heavy metals, nitrogen, phosphorus and organic pollutants through pavement layer modification, roadside structure optimization and plant synergy. The method is especially suitable for runoff treatment of urban traffic areas and commercial residence mixed areas, diatomite, quartz sand or straw biochar is used for replacing traditional mineral powder for pavement layer modification to prepare a porous asphalt pavement, and the adsorption capacity on heavy metal and total phosphorus is enhanced; in the roadside structure optimization, a double-layer filter material combination is arranged as a percolation layer, and nitrogen and phosphorus pollutants are selectively removed; the combination of the yellow acorus gramineus and the miscanthus sibiricus is planted on the roadside of the commercial and residential mixed area, and degradation of organic pollutants is enhanced; the multi-module combination overcomes the defects of single purification function and short system life in the prior art.

This invention discloses a dual-functional material based on steel slag, its preparation method, and its application, belonging to the field of solid waste resource utilization and environmental pollution control technology. The method uses steel slag, a solid waste from the iron and steel industry, as raw material, and prepares an iron-rich catalyst and a calcium-rich adsorbent through selective leaching. The iron-rich catalyst efficiently activates PMS in a photocatalytic persulfate (PMS) system to degrade tetracycline antibiotics in water; simultaneously, the calcium-rich adsorbent can capture CO2 generated during antibiotic degradation in situ, thus achieving multiple objectives of solid waste resource utilization and pollution and carbon reduction. This invention utilizes widely available and inexpensive raw materials and employs a simple process, effectively improving the high-value-added resource utilization level of steel slag and overcoming the carbon emission problems associated with traditional advanced oxidation technologies, providing a new approach for synergistic technologies of wastewater treatment and carbon reduction.

The application discloses a fluorine chemical industry park PFAS prediction system and a collaborative verification method based on multi-medium dynamic distribution, relates to the technical field of environmental monitoring and pollution control, and comprises a fluorine chemical industry data acquisition module, a fluorine chemical industry feature extraction module, a cross-medium correlation distribution module, a PFAS concentration risk prediction module and a PFAS visual display module; the fluorine chemical industry data acquisition module acquires and pre-processes chemical oxygen demand data and fluorine ion concentration data in water bodies at discharge outlets of a fluorine chemical industry park, and detects the PFAS concentration in water bodies, sediments and aquatic organisms by sampling. The application effectively improves the monitoring and early warning capability of PFAS pollution in the fluorine chemical industry park by constructing the PFAS prediction system and the collaborative verification method based on multi-medium dynamic distribution, realizes accurate prediction of the PFAS concentration and rapid identification of pollution sources, reduces the detection cost, improves the real-time performance and the dynamic early warning level, provides a scientific basis for environmental pollution control, and promotes the development of the environment-friendly fluorine chemical industry.

The present application belongs to the technical field of environmental pollution control, and particularly relates to a continuous and stable adding method and device for a poorly soluble hydrophobic organic substance in an aqueous phase system. The target substance is dissolved in a volatile organic solvent to form a stock solution, or an organic solution of the target substance is used as a starting material, quantitatively added to a film forming container, and evaporated to form a film. Then, an aqueous phase medium is added and dispersed by ultrasonic waves to obtain a uniform dispersed phase stock solution. During the adding process, continuous stirring is performed to keep the suspension, and a metering pump is used to pump the target aqueous phase system at a set flow rate or period, while mechanical stirring is performed for cyclic mixing to reduce the local concentration gradient. Under the premise of reducing the interference of a co-solvent and a surfactant, the present application realizes stable and reproducible adding of a poorly soluble hydrophobic organic substance, and is suitable for reactor exposure and environmental water body simulation.

The invention belongs to the technical field of environmental pollution control, and particularly relates to a preparation method of a flexible carbon / MoS2 heterojunction adsorption material and application of the flexible carbon / MoS2 heterojunction adsorption material as an adsorbent. The preparation method comprises the following steps: S1, cleaning waste cellulose fibers with deionized water and ethanol, drying, heating to 700-900 DEG C for carbonization in an inert atmosphere, and preserving heat for 1-3 hours to obtain a flexible carbon skeleton substrate with a complete structure; s2, carrying out oxidation treatment on the carbon skeleton substrate in an air atmosphere at 200-400 DEG C for 0.5-2 hours; s3, a molybdenum source and a sulfur source are dissolved in deionized water according to the molar ratio of Mo to S being 1: 2-1: 20; immersing the oxidized carbon skeleton substrate into the precursor solution, putting into a reaction kettle, and carrying out hydrothermal reaction at 140-200 DEG C for 6-18 hours; and washing the product, and carrying out vacuum drying. The flexible heterojunction material prepared by the method has macroscopic flexibility, super-hydrophilicity and abundant high-activity sites, and can be directly used as a self-supporting adsorption film; the defects that a traditional powder adsorbent is difficult to separate and easy to lose are overcome.

The invention provides a low-carbon fly ash-based ferric oxide composite catalyst as well as a preparation method and application thereof, and belongs to the technical field of industrial solid waste recycling and environmental pollution control. The method comprises the following steps: carrying out acid activation and solid-liquid separation treatment on a low-carbon fly ash carrier, and carrying out calcination treatment on an optimized product obtained after solid-liquid separation, so as to obtain the composite catalyst. The method is simple in process flow; the utilization rate of the high-carbon fly ash reaches 95%; and the preparation cost is reduced by 60% compared with commercial catalysts. The process of turning the high-carbon fly ash into wealth is promoted, the negative influence of the high-carbon fly ash on the environment is reduced, and a positive contribution is made to efficient resource utilization of the high-carbon fly ash. The composite catalyst is loaded with alpha-Fe2O3, so that the composite catalyst has higher toxicity resistance. The composite catalyst is applied to selective catalytic reduction denitration, the problem that an existing denitration catalyst is poor in low-temperature activity is solved in the true sense, and the composite catalyst further has the advantage of being environmentally friendly and wide in application prospect.

The invention provides a functional foam material as well as a preparation method and application thereof, and belongs to the technical field of environmental pollution control. The functional foam material provided by the invention comprises the following components: an anionic surfactant, a foam stabilizer, an oxidizing agent, an auxiliary agent and water, when the oxidizing agent is a solid oxidizing agent, the functional foam material is in a liquid phase; when the oxidizing agent is a gaseous oxidizing agent, the functional foam material comprises a liquid phase and a gas phase; the concentration of the anionic surfactant in the liquid phase is 0.2-0.4 wt%; the concentration of the foam stabilizer in the liquid phase is 0.4-0.6 wt%; the concentration of the solid oxidant in the liquid phase is 0.5-5 wt%; the concentration of the auxiliary agent in the liquid phase is 1-5wt%; the ratio of the volume of the gaseous oxidant to the total volume of the liquid phase is (3-4): 1.

The application discloses a controllable synthesis method of coal-based carbon materials and application in organic wastewater treatment, and belongs to the technical field of water treatment. The cold extraction liquid added with metal active components is used to rapidly cool the calcined coal fine particles, and in the process, the metal active components are dispersed in large amounts and enter the surface of the coal fine particles, so that the effect of treating organic pollution is effectively improved. The problems of insufficient adsorption and catalytic degradation capacity of the existing coal-based carbon materials in organic wastewater treatment are effectively solved. After the material is saturated, activated persulfate is used to remove the adsorbed organic pollutants on the coal-based carbon materials, and the regeneration of the coal-based carbon materials is realized. The prepared carbon materials retain the phase at high temperature, have strong structural stability, and have uniform active component distribution, so that the problems of difficult treatment of large-volume wastewater and difficult regeneration of the saturated adsorption material of the carbon materials are overcome, and the carbon materials can be used for environmental pollution control.

The invention discloses a system and a method for in-situ catalytic reforming of biomass tar by exciting quantum energy waves through a special functional alloy material, and belongs to the technical field of biomass energy conversion and environmental pollution control. The system comprises a biomass cracking unit, a reforming reactor and a synthesis gas purification and utilization unit which are connected in sequence. The reforming reactor is filled with a special austenite alloy material, and the material can release 800-1200 THz ultraviolet band electromagnetic waves under the conditions that the temperature is 600-900 DEG C and the pressure is not lower than 0.5 MPa. When biomass pyrolysis gas containing tar passes through, ultraviolet waves directly destroy chemical bonds of tar molecules and excite generation of high-activity free radicals, and the tar is efficiently converted into synthesis gas under the combined action of the ultraviolet waves and the high-activity free radicals. The invention realizes the spanning from chemical catalysis to physical catalysis, thoroughly solves the problems of carbon deposition, poisoning, inactivation and the like of the traditional catalyst, and has the advantages of high treatment efficiency, no need of extra energy consumption, long service life, environmental friendliness and the like.

The application belongs to the technical field of adsorbing materials of perfluorinated compounds, and discloses fluoridation modified biochar as well as a preparation method and application thereof; the preparation method of the fluoridation modified biochar is as follows: taking a fluorine-containing ionic compound as a modifier, uniformly dispersing the fluorine-containing ionic compound in an aqueous solvent to obtain a modified solution; placing biochar in the modified solution and mixing to obtain a mixed solution; then, the mixed solution is sequentially subjected to oscillation treatment and ultrasonic treatment, and is filtered, washed, dried and ground, so that the fluoridation modified biochar is obtained. The biochar is fluoridation modified by using the fluorine-containing ionic compound, so that the process is simple, the operation is convenient, the adsorption capacity of the prepared product is increased, the removal efficiency of pollutants such as perfluorooctanoic acid in water is improved, and the fluoridation modified biochar has good research value and application prospect in the field of environmental pollution control.

The application provides a microbial fuel cell with a photo / electrothermal catalytic evaporation desalination electrode for treating salt-containing wastewater and an application, and belongs to the technical field of environmental pollution control and energy utilization. A PVDF / CFC membrane loaded with a catalyst Fe@MoS2 and activated carbon are used as double cathodes of the system, microorganisms and a carbon rod are used as an anode of the system, an external resistance is arranged between the two, and wires are connected to form a loop, which can generate electric energy while treating pollutants. A xenon lamp is used to irradiate the evaporation catalytic membrane, so that the evaporation body can perform photo-thermal conversion, and water is changed into steam while heat is generated, so that desalination and water purification of high-salt wastewater are realized. In addition, the evaporation catalytic membrane can generate a photocatalytic effect under irradiation, realizes self-cleaning of the membrane, and can be recycled. The system adopts two kinds of water feeding modes, i.e., a circulating batch mode and a continuous feeding mode, so that the effects of the biological anode and the catalytic cathode are fully utilized to realize wastewater treatment and power generation.

The application belongs to the technical field of catalysts, and relates to a titanium-based nanoscale ozone oxidation catalyst, in particular to an ozone oxidation catalyst for advanced treatment of industrial wastewater, and further discloses a preparation method and application thereof. The titanium-based nanoscale ozone oxidation catalyst comprises a rho-Al2O3 carrier and a NiO@TiO2 active component. The multi-metal oxide with the aluminum trioxide as the carrier has extremely high activity, is good in wastewater treatment effect, and is convenient to recycle and use. TiO2 contained in the active component is a catalyst widely applied at present, and plays an important role in sewage treatment and environmental pollution control.