5161 results about "Environmental chemistry" patented technology

A direct air capture (DAC) of CO2 system includes a reaction reactor having a solid, amine-functionalized sorbent configured to sequester CO2 from air; an in-situ dual-function device configured as a CO2 conversion reactor and an exchange fluid regeneration device; and the exchange fluid, recirculating between the reaction reactor and the dual-function device, configured to capture the sequestered CO2 from the solid sorbent in the reaction reactor and release the captured CO2 in the conversion reactor, the exchange fluid including one or more amino acids.

An atmospheric CO2 capture system includes a compartment housing a solid CO2 sorbent, an exchange fluid including a chemical component with selectivity towards CO2, and an electrochemical cell or mineralization reactor in fluid communication with the compartment, the system having a cycle including a first state of sorbing CO2 from incoming air onto the solid CO2 sorbent until a saturation point is reached; a second state of regenerating the sorbent by flooding the compartment with the exchange fluid to detach CO2 from the saturated sorbent and bind the detached CO2 to the chemical component; and a third state of regenerating the chemical component and utilizing the CO2 in the electrochemical cell or mineralization reactor.

An atmospheric CO2 capture system includes a compartment housing a solid CO2 sorbent, an exchange fluid including a chemical component with selectivity towards CO2, and an electrochemical cell or mineralization reactor in fluid communication with the compartment, the system having a cycle including a first state of sorbing CO2 from incoming air onto the solid CO2 sorbent until a saturation point is reached; a second state of regenerating the sorbent by flooding the compartment with the exchange fluid to detach CO2 from the saturated sorbent and bind the detached CO2 to the chemical component; and a third state of regenerating the chemical component and utilizing the CO2 in the electrochemical cell or mineralization reactor.

A system for capture of atmospheric CO2 includes a reaction reactor having a solid sorbent; and a mineralization reactor downstream from the reaction reactor, the system having three states including in the reaction reactor, a first state of sequestering CO2 from air into the solid sorbent; in the reaction reactor, a second state of releasing the sequestered CO2 from the sorbent by contacting the CO2-enriched sorbent with an exchange fluid having one or more amino acids and forming a CO2-enriched exchange fluid; and in the mineralization reactor, a third state of reacting the sequestered CO2 from the CO2-enriched exchange fluid with an alkaline feedstock to form a carbonate while regenerating the exchange fluid.

A thermochemical reactor for receiving a source of atmospheric carbon dioxide and reducing the atmospheric carbon dioxide is provided. In one or more embodiments, the thermochemical reactor may be part of an atmospheric carbon capture system that includes a solid sorbent and an exchange fluid that is cycled between the solid sorbent and the thermochemical reactor.

The invention discloses a microbiological deodorization method, which belongs to the technical field of disinfection and deodorization, and comprises the following steps: S1, preparing a microbial preparation, S2, pre-stirring a strain combination; S3, preparing a deodorant from the prepared composite microbial preparation according to the mass; and S4, putting a prepared deodorant into an ultrasonic atomizer or a spray tower. According to the invention, the microbial preparation is creatively adopted to perform spray deodorization on the odor source, so that the deodorization efficiency is high, the effect is good, the treatment cost of the odor source and odor is effectively reduced, the overall operation difficulty is low, only the polluted area is atomized, the odor is effectively controlled before volatilization, the odor pollution spreading can be effectively controlled, and the influence on the operation environment is avoided; the microbial inoculum is non-toxic, can be naturally degraded, has no residue after deodorization, does not need additional neutralization and filtration, has higher environmental adaptability, and meets the deodorization requirements of small and medium-sized farms and small and medium-sized garbage collection stations.

The invention discloses a cisatracurium besilate content testing method which comprises the following steps: respectively weighing a test substance and a reference substance in a measuring flask, adding hydrochloric acid for dissolving and metering a volume to a scale, shaking up to prepare a corresponding solution, finally, measuring the solution according to an ultraviolet-visible spectrophotometry, measuring absorbance at a place of a maximum adsorption wavelength of 280nm, and calculating the content of cisatracurium besilate according to an anhydrous substance. According to the cisatracurium besilate content testing method, the solution is simply and conveniently prepared, no organic solvent is used, and the pollution to the environment and the harm to a human body are small. The cisatracurium besilate content testing method is higher in testing speed, and the time of testing each batch of products in average only needs 30 min. A place of a maximum adsorption wavelength of 280 nm is selected, so that the testing accuracy is ensured. The cost of a reagent used in a process of checking each batch of samples does not exceed 20 yuan; the testing cost of each batch of samples by adopting a high-performance liquid chromatography method is not less than 200 yuan, so that the cost of enterprises is greatly lowered.

An exchange fluid having one or more amino acid for removing carbon dioxide from a solid sorbent and systems containing the same are disclosed. The exchange fluid may further include a neutralizing base for neutralizing the amino acid. The system may further employ an electrochemical cell to regenerate the exchange fluid by removing carbon dioxide from the exchange fluid without employing degrading temperatures and pressures.

The application belongs to the technical field of big data calculation, and particularly relates to a top-down urban carbon emission accounting method and system. The top-down urban carbon emission accounting method comprises the following steps: S1, gridizing map data to obtain carbon dioxide column concentration molar concentration data corresponding to each grid; S2, obtaining a carbon dioxide concentration difference between an accounting area and a surrounding area of the accounting area according to the carbon dioxide column concentration molar concentration data; S3, obtaining carbon dioxide concentration data of the accounting area according to the carbon dioxide concentration difference; S4, obtaining a carbon dioxide emission amount of the accounting area according to the carbon dioxide concentration data and a volume of the accounting area; and S5, obtaining a carbon emission amount of the accounting area according to the carbon dioxide emission amount. The top-down emission accounting method can avoid the problem of statistical inaccuracy in the traditional layer-by-layer reporting of carbon emissions by various industries.

Processes and systems for providing a CO2 enriched stream from an air stream, by: selectively adsorbing, in a first separation zone, CO2 and H2O in an air stream and providing a CO2 and H2O depleted gas stream; separating, in a second separation zone, the CO2 and H2O depleted gas stream and providing an N2 enriched stream, an O2 enriched stream, and an N2 enriched regeneration stream; heating the N2 enriched regeneration stream to provide a heated N2 enriched regeneration stream; selectively desorbing, in the first separation zone, the CO2 and H2O using the heated N2 enriched regeneration stream and providing a spent regeneration gas stream; drying the spent regeneration gas stream to remove H2O and providing a dried spent regeneration gas stream; and separating, in a third separation zone, the CO2 from the dried spent regeneration gas stream to provide a CO2 enriched stream.

A hydrocarbon stream is combusted within a reactor to produce soot and syngas. Sub-stoichiometric combustion of the hydrocarbon stream within the reactor converts at least 10% of the carbon in the hydrocarbon stream into soot. The syngas is mixed with a steam stream to produce a hydrogenation feed stream. A shift reactor converts at least a portion of the carbon monoxide and steam to carbon dioxide and hydrogen to produce a shifted gas stream. Water is separated from the shifted gas stream to produce a dehydrated gas stream. The dehydrated gas stream is separated to produce a hydrogen product stream and a recycle stream. The recycle stream is recycled to the reactor.

This invention discloses a controlled-release solid film formulation for pesticides, its preparation method, and its applications. This invention upgrades pesticides from liquid / powder formulations to solid film formulations, utilizing the solid film to physically block pesticide drift, diffusion, and loss, reducing off-target effects at the source. Through the combined use of physical and chemical techniques, pesticides are uniformly distributed within the solid film, and the pesticide release cycle is synchronized with the solid film degradation, achieving precise controlled release. This solid film formulation is applied from the beginning of crop growth, synchronized with the plant growth cycle, providing early preventative effects through quantitative controlled release of pesticides. This solid film formulation also functions as a mulch film; its preparation process is simple and easy, it is completely degradable and requires no recycling, reducing costs. The identification method of this invention utilizes selective precipitation separation technology, achieving high pesticide extraction efficiency of 95%-98%, especially suitable for low water-soluble pesticides. The drug identification process is simple to operate: the entire process takes less than 4 hours, requires no complex purification steps, and is suitable for batch sample processing.

This invention belongs to the field of saline-alkali land remediation technology, and specifically discloses a saline-alkali land remediation composite material obtained by a co-hydrothermal method using plant and animal biomass, and its preparation method. This saline-alkali land remediation composite material uses heavy metal-containing biomass as raw material, which can be converted into saline-alkali land remediation particles at low cost and safely. Supplemented with specific components of the co-hydrothermally derived saline-alkali land remediation solution, the rich organic matter and trace elements effectively improve the infertility problem of saline-alkali soil. Furthermore, the low pH of the saline-alkali land remediation solution reduces the pH of the saline-alkali soil, comprehensively achieving the improvement and remediation of saline-alkali soil. This preparation method not only effectively consumes heavy metal-containing biomass but also provides a foundation for the long-term development of saline-alkali land remediation technology. This invention also discloses a saline-alkali land remediation method based on the above-mentioned saline-alkali land remediation composite material. After application, it lowers the soil pH by at least 0.50 units and also increases the content of nutrients such as total nitrogen, hydrolyzable nitrogen, and organic carbon in the soil.

The application discloses a membrane biological reaction sewage treatment device with sludge recovery and reduction structure and relates to the technical field of membrane biological reaction sewage treatment.The device comprises a treatment pool body, a membrane reaction group arranged on the right side in the treatment pool body, a separation mechanism arranged on the left side in the treatment pool body, a separation partition plate, a separation sieve plate fixedly arranged on the left side in the middle of the separation partition plate, a flow transverse groove arranged in the lower end of the separation partition plate, and a sedimentation mechanism arranged on the middle of the treatment pool body.The left side area of the treatment pool body is isolated by the separation partition plate, the flow transverse groove is arranged in the lower end of the separation partition plate, and the sedimentation mechanism is arranged on the middle of the treatment pool body.The membrane biological reaction sewage treatment device with sludge recovery and reduction structure can separate the water-containing sludge by the treatment pool body, reduce the load of the treatment pool body, and uniformly distribute the medicament by the middle spreading filter box, so that the sewage is efficiently treated by overflowing into the membrane reaction group, and the efficiency of environmental protection treatment is improved.

This invention discloses a resource-based treatment system and method for barium sulfide slag. The system involves crushing and leaching the barium sulfide slag using a pretreatment unit, thereby leaching out the barium sulfide. The barium-enriched washing solution is then processed through an electrophoretic deep treatment unit to achieve high-value recovery of sulfur and barium elements, ultimately realizing the resource utilization of the barium slag. The entire process is pollution-free and has the advantages of being environmentally friendly, having high added value, high sulfur utilization efficiency, low cost, and simple operation. It is suitable for large-scale industrial applications and has broad market prospects and significant economic benefits.

According to the present invention, there is provided a method for processing lithium-containing minerals into fractions, the method including a calcination with additives, followed by a pressure leaching in an alkaline leaching solution.

This invention relates to the field of wastewater treatment technology, specifically to a highly efficient adsorbent wastewater treatment agent and its preparation method, comprising the following raw materials in parts by weight: 50-70 parts activated carbon powder, 8-12 parts deionized water, 5-10 parts ammonium bicarbonate, 1-3 parts sodium dodecyl sulfate, 15-25 parts additive A, and 8-15 parts additive B. In this invention, the stably loaded cerium ions can effectively exert their specific coordination and capture effect on heavy metals. The chitosan introduced into the carrier can enhance the electrostatic and chelate adsorption of anionic pollutants and organic molecules. Simultaneously, the well-developed pores formed after shellac carbonization combine with the network structure of chitosan, further increasing the specific surface area of ​​the material and the adsorption capacity of organic pollutants, achieving highly efficient and stable adsorption of heavy metals, dyes, and organic pollutants.

This application discloses an online assessment method and system for the biotoxicity of groundwater complex pollution, relating to the field of environmental monitoring technology. The system includes a multi-channel monitoring device, a data processing and calculation unit, and an early warning output unit. The method includes: acquiring time-series data of the movement trajectories of each fish in multiple independent monitoring channels; extracting multi-dimensional behavioral features from each monitoring channel; determining the baseline values ​​of the behavioral features of each monitoring channel at the current moment using a dynamic baseline model; comparing the multi-dimensional behavioral features with the baseline values ​​to calculate standardized feature offsets; fusing the standardized feature offsets of each monitoring channel to obtain a comprehensive feature vector, which is then input into a biotoxicity assessment model to output a comprehensive assessment result of the biotoxicity of the water body. This method intelligently learns the complex mapping relationship between complex pollution characteristics and biological responses, achieving more sensitive, accurate, and intelligent online monitoring and assessment of groundwater complex pollution.

The present disclosure relates to new methods and processes of byproduct conversion, wastewater remediation, byproduct upcycling / recycling, and sustainable cyclic methods thereof.

A kind of high nitrogen-containing phosphorus wastewater treatment system, including pH adjusting pool, primary reaction pool, sedimentation tank, secondary reaction pool, air floatation tank, filter tank, electrochemical reaction tank and clear water tank in series in proper order;The electrochemical reaction tank includes electrochemical device, electrochemical device is assembled by multiple independent box, it is arranged in a row in the form of '' one '' character, the cavity in each box forms a reaction chamber, and the connecting side of adjacent box is equipped with communicating port, after sealing connection of adjacent box, communicating port of adjacent box is interconnected, and exchange membrane is installed between the communicating port of adjacent box.This utility model directly degrades organic pollutants by electrode reaction, long-term operation cost is lower than traditional technology, achieves the simultaneous recycling of nitrogen and phosphorus, and helps to realize the sustainable development and resource recovery of wastewater treatment.

A system and method for chemically destroying, degrading and incinerating a fluorocarbon or fluorinated material, such as perfluoroalkyl and polyfluoroalkyl substances (PFAS), with reduced emissions of gaseous PFC is provided. The method includes mixing the fluorinated material with an aqueous alkoxide base in a batch reactor to form a suspension. The PFAS can be provided by AFFF. The reaction mixture is heated to a temperature ranging from about 25ºC to about 400ºC for about 0.5 hours to about 240 hours to defluorinated fluorocarbons in the PFAS and produce a defluorinated waste product. More specifically, the method converts organic fluorine present in the PFAS to inorganic fluoride. Thus, the defluorinated waste product can be incinerated with reduced emissions of harmful gaseous PFCs.

The application discloses a high-salt-resistant denitrifying bacterial strain and a microsphere preparation thereof, a preparation method and application thereof, relates to the technical field of environmental microorganisms and wastewater biological treatment. Pseudomonas sp. The classification name of the strain is Pseudomonas sp., the preservation number is CGMCC No. 36626, the strain is preserved in the China General Microbiological Culture Collection Center, and the preservation date is November 14, 2025. The preparation method of the microsphere preparation containing the strain comprises the following steps: carrying out strain amplification culture to obtain a bacterial liquid, mixing the bacterial liquid with porous starch and a protective agent, then performing vacuum freeze drying to obtain bacterial powder, and then mixing the bacterial powder with a sodium alginate solution, and dropping the mixture into a calcium chloride solution to obtain the microsphere preparation. The microsphere preparation can maintain a nitrate nitrogen removal rate of more than 80% after being stored at-18 to-22 DEG C or 20 to 25 DEG C for 28 days, and can be used for denitrification and nitrogen removal of low-carbon-nitrogen-ratio and high-salt wastewater (such as urine wastewater in a closed circulation system).

A process for removing methanol, CO2, or both from a hydrocarbon stream is described. The process uses an adsorbent comprising a binderless 3A type zeolite. The adsorbent has high methanol removal capacity and low olefin co-adsorption capacity, as well as low reactivity in the olefin stream. This allows for reduced adsorbent loading while maintaining downstream catalyst performance and product quality. The adsorbent comprises a 3A type zeolite comprised of less than 5% binder and an ion exchange ratio of 30%-70%. The adsorption process allows for an outlet methanol content of 1 ppmw or less to be obtained.

An attractant for Telenomus remus Nixon to control Spodoptera litura Fabricicus is provided. The attractant includes a solvent and at least one of the following components: 1,3-dichlorobenzene, benzothiazole, and octane. The attractant can effectively attract Telenomus remus Nixon to parasitize Spodoptera litura Fabricius eggs, such that the growth of a pest quantity is inhibited and the pest population gradually dies out, which achieves the purpose of pest control. The attractant is a green, non-toxic, and pollution-free attraction substance. Therefore, the attractant can solve a series of problems such as pesticide residues, environmental pollution, and food safety caused by chemical control, and is of great significance for the green control of Spodoptera litura Fabricius.

This invention discloses a method and system for monitoring and assessing the marine aquaculture environment using IoT big data. The method includes: collecting multi-dimensional environmental parameters such as dissolved oxygen, nitrogen and phosphorus nutrients, and pH value through IoT sensing devices; performing parallel reception and status verification through a high-concurrency marine environmental data processing platform; using a multi-dimensional time-series data adaptive clustering algorithm to perform time-series segmentation and similarity clustering of the parameters; quantitatively assessing water quality status based on the clustering results using a eutrophication assessment model; and then dynamically predicting stress intensity and duration using an environmental stress response prediction model, combined with parameters adapted to the growth cycle of aquaculture organisms. The platform integrates the assessment and prediction results to generate a structured report including parameter change trajectories, level indicators, and predicted trend curves, achieving precise monitoring and assessment of the marine aquaculture environment throughout the entire process, providing reliable technical support for aquaculture environment regulation.

5 Disclosed is a process for capturing multi-gas emissions. The process comprises passing multi-gas emissions through a reactor unit, spraying any one of sodium hydroxide, fly ash, fly ash-slaked / quick lime mixture, fly ash- steelmaking residue mixture, slaked lime- steelmaking residue mixture, red mud and red mud-fly ash mixture, over the multi-gas emissions in the reactor unit; and capturing water droplets coming along the multi-10 emissions using a demister unit.

The embodiment of the present disclosure provides a concentration analysis method for ultra-low concentration of acidic gas in background atmosphere, which is applied to the technical field of atmospheric environment monitoring and meteorological observation. The method comprises the following steps: selecting at least two suitable blank filter membranes according to the chemical properties of the target acidic gas; arranging the blank filter membranes in the sampling device of the atmospheric background station in a preset serial order for continuous sampling; performing extraction treatment on the sampled filter membranes respectively, and using an ion chromatograph to quantitatively detect the target ion concentration in the extraction liquid, and converting the mass of the corresponding acidic gas; based on the flow monitoring data during sampling, calculating the total sampling volume through a conversion equation, and combining the mass of the acidic gas to calculate the concentration value of the target acidic gas. In this way, the problems of low enrichment efficiency, high detection limit and invalidation of online instruments due to concentration lower than the detection limit of the traditional method can be solved, and accurate capture and quantification of ultra-low concentration of acidic gas in background atmosphere are realized.

The present invention relates to a method for reducing emissions from manure, the method comprising adding 5.0-11.5 g of iron salt per 1 kg manure and adding 1.7-3.5 g of hydrogen peroxide (H2O2) per 1 kg manure. The invention also relates to a method for improving plant growth. Furthermore, the invention relates to a manure additive for reducing emissions from manure and improving plant growth comprising H2O2 and biochar. Furthermore, the invention relates to an organic fertilizer comprising manure and the manure additive.