17 results about "Hydrocarbon contamination" patented technology

The invention provides a microwave remediation efficiency prediction method for polycyclic aromatic hydrocarbon contaminated soil, and belongs to the field of physical remediation of soil. The method comprises the steps that soil parameters, remediation parameters based on microwave soil remediation and the polycyclic aromatic hydrocarbon removal rate are obtained; based on a data fitting method, determining a corresponding relation between the soil parameter and / or the remediation parameter and the polycyclic aromatic hydrocarbon removal rate; according to the corresponding relation between the soil parameters and / or the remediation parameters and the polycyclic aromatic hydrocarbon removal rate, predicting the polycyclic aromatic hydrocarbon removal rate under the known soil parameters and / or the remediation parameters; according to the method, accurate prediction of the polycyclic aromatic hydrocarbon removal rate of the soil can be realized, and a theoretical basis is provided for optimizing microwave remediation process parameters.

The invention relates to the technical field of environmental remediation, and particularly discloses a method for remedying chlorinated hydrocarbon pollution, a chlorinated hydrocarbon pollution remediation agent and application, and the method comprises the steps that an injection point is arranged on a chlorinated hydrocarbon pollution site; preparing a sodium persulfate solution with the mass concentration of 7.5%-15%, and preparing a mixed solution of ferrous sulfate with the mass concentration of 1.6%-3.2% and sodium pyrophosphate with the mass concentration of 1.25%-2.5%, namely an iron pyrophosphate mixed solution; drilling is carried out according to the set injection points, drilling is carried out to the pollution depth of the chlorinated hydrocarbon pollution site, and a sodium persulfate solution is sprayed from deep to shallow; spraying a ferric pyrophosphate mixed solution in the same manner, after 7-14 days of chemical oxidation remediation, spraying 5-10 L of emulsified vegetable oil, and naturally remediating for 30-35 days. According to the method, the concentration of chlorohydrocarbon pollutants in chlorohydrocarbon polluted site soil and underground water is remarkably reduced.

A process for treating a polyolefin powder contaminated with at least one hydrocarbon, comprising the steps of: a) discharging contaminated polyolefin powder from a polymerization reactor into a first degassing vessel, e.g. via a product recovery vessel; b) contacting the contaminated polyolefin powder in said first degassing vessel with nitrogen and steam to extract the hydrocarbon contamination from said powder thereby providing decontaminated polyolefin powder; c) transferring from the first degassing vessel, nitrogen, steam and hydrocarbon contamination to a flare system or a thermal oxidation system; d) transferring the decontaminated polyolefin powder from step b) into a powder conveying system containing a nitrogen stream to convey the decontaminated polyolefin powder; wherein at least a part of the nitrogen stream is recycled from said powder conveying system to the first degassing vessel.

The invention provides a hydrocarbon pollution detection method and device by coupling spectrum subtraction and characteristic T detection, and belongs to the technical field of environmental monitoring. The method comprises the following steps: acquiring target near infrared spectrum data of a to-be-detected area, determining corresponding background near infrared spectrum data according to the ground feature type of the to-be-detected area, and determining the target near infrared spectrum data according to the background near infrared spectrum data; the background near infrared spectrum data is reference spectrum data which is the same ground object as the to-be-detected target and is not polluted by hydrocarbons; performing subtraction processing on the target near infrared spectrum data and the background near infrared spectrum data to generate a difference spectrum; selecting a hydrocarbon characteristic absorption wave band and a reference wave band, and carrying out independent sample T inspection on the spectral value of the difference spectrum in the hydrocarbon characteristic absorption wave band and the spectral value of the difference spectrum in the reference wave band; and determining a hydrocarbon pollution detection result of the to-be-detected area based on the detection result. According to the method, background interference is eliminated through spectrum subtraction, an objective judgment standard is established by utilizing T test, and the scientificity and applicability of hydrocarbon pollution detection are improved.

The invention belongs to the technical field of soil remediation, and particularly relates to a preparation method of a biochar composite material and a soil remediation method. Comprising the following steps: preparing a charcoal specific adsorption material; preparing an earthworm mucus adhesive; and compounding and granulating the biochar microorganisms. According to the preparation method, phenanthrene is taken as a template molecule, 4-vinylpyridine is taken as a functional monomer, charcoal is taken as a loading material, and the charcoal specific adsorption material capable of specifically recognizing the polycyclic aromatic hydrocarbon pollutants is prepared through a pi-pi stacking effect between phenanthrene and 4-vinylpyridine; the biochar composite material is prepared by taking a biochar specific adsorption material as a loading material of a composite microbial agent, and can specifically adsorb polycyclic aromatic hydrocarbon pollutants in soil, so that microorganisms in the composite microbial agent can continuously degrade the polycyclic aromatic hydrocarbon pollutants such as phenanthrene and pyrene in a large range, and the polluted soil is effectively repaired.

The application belongs to the technical field of soil remediation, and particularly relates to a preparation method of a biochar composite material and a soil remediation method. The method comprises the following steps: preparation of a biochar specific adsorption material; preparation of a earthworm mucus adhesive; and compounding and granulation of biochar microorganisms. In the application, phenanthrene is used as a template molecule, 4-vinylpyridine is used as a functional monomer, and biochar is used as a loading material. Through the pi-pi stacking effect between phenanthrene and 4-vinylpyridine, the biochar specific adsorption material with specific recognition of polycyclic aromatic hydrocarbon pollutants is prepared. The biochar specific adsorption material is used as a loading material of a composite microbial agent to prepare a biochar composite material. The biochar composite material can specifically adsorb polycyclic aromatic hydrocarbon pollutants in the soil, so that the microorganisms in the composite microbial agent can continuously degrade a large range of polycyclic aromatic hydrocarbon pollutants such as phenanthrene and pyrene, and the contaminated soil is effectively remediated.

The application provides a hydrocarbon pollution detection method and device coupled with spectral difference subtraction and characteristic T test, and belongs to the technical field of environmental monitoring. The method comprises the following steps: obtaining target near-infrared spectrum data of a detection area; determining corresponding background near-infrared spectrum data according to the ground feature type of the detection area, wherein the background near-infrared spectrum data is the reference spectrum data of the same ground feature as the detection target and not polluted by hydrocarbon; performing difference subtraction processing on the target near-infrared spectrum data and the background near-infrared spectrum data to generate a difference spectrum; selecting a hydrocarbon characteristic absorption wave band and a reference wave band, and performing independent sample T test on the spectrum value of the difference spectrum in the hydrocarbon characteristic absorption wave band and the spectrum value in the reference wave band; and determining the hydrocarbon pollution detection result of the detection area based on the test result. The application eliminates background interference through spectral difference subtraction, establishes an objective judgment standard by using T test, and improves the scientificity and applicability of hydrocarbon pollution detection.

The application discloses an anodic bonding method for analyzing crystals, which comprises the following steps: S1, wet cleaning a substrate; S2, plasma cleaning the substrate and a single crystal wafer after wet cleaning; and S3, bonding the single crystal wafer after plasma cleaning to the substrate through anodic bonding. The application combines wet cleaning and plasma cleaning to obtain clean silicon wafers and borosilicate glass substrates without dust and hydrocarbon contamination in an atmospheric environment of a common laboratory. Subsequently, a common anodic bonding device can be used to obtain an analysis crystal without air bubbles. The method of the application can be applied to the manufacture of spherical crystals, and also includes the manufacture of planar, cylindrical, toroidal, ellipsoidal and other quadratic or multiple function curved surface crystals. The radius of curvature covers 180 mm to 2 m.

The present application relates to a kind of system and process method for removing aromatic hydrocarbons in sewage, especially the removal of toluene and xylene pollutants in sewage.The process includes adsorption system, regeneration system, aromatic hydrocarbon recovery system;Aromatic hydrocarbon-containing wastewater is sequentially entered and exited in adsorption system, and aromatic hydrocarbons are adsorbed in adsorbent, and effluent does not contain or contains trace amounts of aromatic hydrocarbons;When adsorbent is regenerated after saturation, first, low-temperature inert gas is used to purge wastewater between adsorbent particles, and then water vapor is used to regenerate adsorbent;Condensed regeneration tail gas is left to stand, aromatic hydrocarbons are separated from water by extraction method, and aromatic hydrocarbons can be reused after refining.The process has the characteristics of complete removal of aromatic hydrocarbon pollutants, low regeneration energy consumption and recyclable aromatic hydrocarbon pollutants.

The device (100) of the present disclosure presents an innovative approach to oxidizing hydrocarbon molecules, vital for environmental remediation and industrial processes. It comprises an inner solid cylinder (102) featuring a capping mechanism to encapsulate hydrocarbons, preventing their release, and a strategically positioned titanium surface catalyst (106) for oxidation. An electrical stimulation module delivers electrical charges to the catalyst, promoting rapid oxidation reactions. Additionally, control mechanisms regulate electrical impulse application, ensuring optimal oxidation conditions. The device (100) offers enhanced efficiency and versatility for treating hydrocarbon contamination in various settings. Its advanced design integrates cutting-edge catalytic and electrochemical principles, providing a sustainable solution for mitigating environmental pollution and advancing industrial processes.

The application relates to a preparation method and application of a humic acid-loaded biochar material for activating persulfate to degrade polycyclic aromatic hydrocarbons, and relates to the technical field of polycyclic aromatic hydrocarbon pollution remediation. The preparation method of the humic acid-loaded biochar is as follows: biochar prepared is mixed with humic acid of a certain concentration, centrifugal freezing drying is carried out after reaction for a certain time, and thus the humic acid-loaded biochar is obtained. The prepared remediation agent maintains the porous characteristics of the biochar, and the activation performance of persulfate is significantly enhanced, polycyclic aromatic hydrocarbon remediation can be realized through adsorption and degradation, and the edible amount of persulfate is greatly reduced. The remediation effect of the humic acid-loaded biochar on polycyclic aromatic hydrocarbons in water bodies and soil is significantly better than that of biochar and humic acid used alone, and after actual polycyclic aromatic hydrocarbon pollution remediation verification, very significant effects are obtained. Meanwhile, the material preparation cost is low, the method is simple, the raw materials are safe, the material has no harmful effect on the environment, and the material is suitable for large-scale popularization and application.

The invention belongs to the technical field of environmental governance and soil sampling equipment, and particularly relates to a polycyclic aromatic hydrocarbon contaminated soil governance sampling device which comprises a rotatable sampling head and a controller, the output end of the sampling head is connected with an openable container, and the side wall of the output end of the sampling head is slidably connected with an automatic sealing mechanism. The automatic sealing mechanism comprises a switching driving assembly and a packaging driving assembly, and the input end of the container is connected with a cleaning mechanism. The structure is convenient to use, the sampling efficiency of the polycyclic aromatic hydrocarbon polluted soil is improved, the detection effect is enhanced, a sampling-packaging-cleaning mode closed loop is realized, and the detection accuracy is enhanced.

The application relates to a method for repairing polycyclic aromatic hydrocarbon (PAHs) contaminated soil, and the specific steps are as follows: S1, surfactant elution treatment of the PAHs contaminated soil to obtain elution treated soil; S2, modification of biochar by using a modified solution to obtain modified biochar; S3, mixing and feeding the modified biochar, MoS2 and single persulfate obtained in the step S2 into the elution treated soil obtained in the step S1 to complete the repair of the PAHs contaminated soil. Compared with the prior art, the surfactant, biochar and MoS2 technology are comprehensively applied to the repair of the PAHs contaminated soil, the solubility and bioavailability of the PAHs are enhanced by using the surfactant first, then the modified biochar is combined with the MoS2 or PMS system to form a composite repair system, and the removal efficiency and repair effect of the PAHs can be improved.

This invention relates to the field of environmental bioremediation, specifically to a novel strain of *Desulfovibrio* Co. and its application in reducing sulfate-oxidizing sulfides and degrading and converting 1,1,1-trichloroethane. The *Desulfovibrio* Co. strain was deposited on February 24, 2024, at the China General Microbiological Culture Collection Center (CGMCC), located at No. 3, Courtyard 1, Beichen West Road, Chaoyang District, Beijing, Institute of Microbiology, Chinese Academy of Sciences, 100101, China, accession number CGMCCNo. 41182.

The present application relates to a kind of field petroleum hydrocarbon pollutant fluorescence in situ monitoring device, the present application uses field petroleum hydrocarbon pollutant fluorescence in situ monitoring device first in the place to be detected site carries out pore making, then control the detection window of field petroleum hydrocarbon pollutant fluorescence in situ monitoring device reaches specified depth, detects petroleum hydrocarbon pollutant in the soil at specified depth.The present application can realize the rapid detection of petroleum hydrocarbon pollutant of contaminated site, especially in the detection of vertical direction is faster.Pore making construction is carried out using vibrator, pore making rate is fast, construction efficiency is high, can also carry out hole cleaning operation, avoids complex soil sampling process.Using the present application can quickly obtain the petroleum hydrocarbon distribution and concentration information of contaminated area, to provide accurate data support for soil remediation.The present application solves the mutual interference problem caused by existing detection means, and the detection precision is higher, and the detection error is smaller.

The invention discloses equipment for remedying polycyclic aromatic hydrocarbon contaminated soil through microorganisms and application of the equipment. The equipment comprises an equipment box, a moving assembly, an adjusting assembly and a remedying assembly. The moving assembly is used for driving the adjusting assembly and the repairing assembly to move in the equipment box; the adjusting assembly is used for switching the working mode of the repairing assembly; the repairing assembly comprises a medicament box and a steam generator which are arranged in the mounting box, a medicament pipe which is arranged on the side wall of the mounting box and is communicated with the medicament box, and a steam injection pipe which is communicated with the steam generator; the equipment is reasonable in structural design, the remediation assembly is driven by the moving assembly to move in the equipment box, so that a microbial remediation agent can be uniformly dispersed into contaminated soil in all areas in the equipment box, and the utilization rate of the microbial remediation agent is increased; meanwhile, the hot steam is injected into the contaminated soil, a reliable growth environment can be provided for microorganisms, and the remediation efficiency of the polycyclic aromatic hydrocarbon contaminated soil can be improved.

The invention relates to the technical field of environmental science engineering, in particular to a polycyclic aromatic hydrocarbon pollution traceability analysis and diffusion simulation method and system.The method comprises the following steps that the photolysis rate is corrected based on aerosol characteristics, initial emission is reduced, a pollution source is analyzed, the particle temperature is calculated, a distribution coefficient is deduced, and pollutant phase states are divided; and establishing a three-dimensional synthetic wind field coupled with the canyon vortex, calculating convection diffusion, and simulating a space migration trajectory. According to the method, the light intensity attenuation rate is calculated and the photolysis rate constant is corrected by analyzing the microstructure characteristics of the aerosol, exponential loss compensation reduction is performed on the monitored concentration in combination with the gas mass transmission time, the initial emission intensity lost due to photochemical reaction is obtained, and a particle surface heat balance equation is constructed to solve the heat balance temperature. The saturated vapor pressure is corrected according to the temperature, a dynamic gas-solid distribution coefficient is calculated, convection diffusion operation is performed in combination with a three-dimensional synthetic flow field, and phase state dynamic evolution distortion and trajectory prediction deviation are avoided.