205 results about "Soil Pollutants" patented technology

The invention discloses a method for treating contaminated soil by combining in-situ heat strengthening and a soil vapor extraction technology, which is characterized in that a heating well with a certain form is formed in a contaminated area, a heater part is provided in the heating well, and a sleeve pipe is installed, a catalyst is filled in the sleeve pipe for accelerating the high temperature decomposition of the pollutant into simple micromolecular substances. At least one well bore is drilled at the central contaminated area of the heating well which is arranged in the certain form to form an extraction well, a vacuum system is provided for realizing the extraction of the contaminated tail gas. the heating well provides heat to contaminated soil of the heating well and the adjacent areas through the thermal conductivity of the heater part arranged in the heating well, soil is heated, the soil pollutant is subjected to processes of evaporation, in-situ pyrolysis, oxidation, combustion, distillation and the like to form tail gas like simple micromolecular gas, water and pollutant steam, then the tail gas is extracted by the vacuum system in the extraction well, and is connected to a tail gas collection pipeline of the extraction well to send to the ground surface, the pollutant in tail gas is treated through a pollutant treatment facility which is installed on the ground surface. The method also comprises an impervious sealing plate which is arranged on the contaminated soil area ground surface for minimizing the gas exchange of the heating well, the extraction well and atmosphere, and preventing the pollutant from entering in atmosphere to form secondary pollution, and a thermal insulation layer is arranged above or below the impervious sealing plate for avoiding the dissipation of heat.

The invention discloses a simulator for transport of soil pollutant. The simulator comprises a solution injection system, a testing column, a measuring system, and an outlet collecting system, wherein the solution injection system comprises solution injection bottles and guide pipes; valves are arranged at two ends of the testing column, conductivity electrode mounting holes are formed in a side face of the testing column, and an air outlet hole is formed in the top of the testing column; the measuring system comprises conductivity electrodes, a conductivity meter, a pressure sensor, a date collector and a computer; the outlet collecting system comprises a water outlet pipe and an outlet collecting container. According to the simulator, the transfer behavior of pollutants in soil body can be simulated indoors; distribution condition of concentration of pollutant in time and space and the real-time changing of the outlet volume can be acquired in a real-time manner during the simulation; the automation degree is high and the precision is high; therefore, the simulator obviously keeps ahead of relative instruments at home and abroad.

The invention relates to a multi-stage thermal desorption remediation system for organic polluted soil, and belongs to the technical field of soil remediation. The system consists of a first-stage thermal desorption device, a second-stage thermal desorption device, a tail gas treatment device, a secondary combustion chamber and a falling type conveying belt. Soil is preheated and desorbed primarily by high-temperature tail gas generated by thermal desorption; a two-stage or multi-stage polluted soil treatment method is adopted, and the residual heat of the tail gas is utilized fully, so that the comprehensive utilization ratio of heat energy of the system is improved obviously; soil enters a thermal desorption cabin with relatively high temperature under the gravity effect by virtue of the S-shaped falling type conveying belt, so that the energy consumption of a conveying and transmitting device and the conveying process is prevented; meanwhile, the soil conveying path and the conveying time are prolonged, the retention time is prolonged, and thus soil pollutants are desorbed relatively fully. The thermal desorption soil remediation system is reasonable in structure, is simple to operate, is convenient to use, has no secondary pollution, recycles residual heat of tail gas, and has wide application prospect and high practical value.

The method is used for locally testing underground soil contamination by determining the generation rate of a first contaminant fluid in porous soil. The method includes the steps of making a hole of known dimensions in the soil, with the hole defining a first and a second spaced-apart portions; covering the hole, so as to define a closed volume in the hole; constantly injecting a second fluid in the hole at a constant given flow rate at said first portion of the hole, while simultaneously collecting fluid samples at the above-mentioned constant given flow rate at the second portion of the hole; measuring the concentrations of the first contaminant fluid from the fluid samples collected at known time intervals; and computing the generation rate of the first contaminant fluid, from the known volume of the hole and from the concentrations previously measured and originating from samples collected at the known time intervals. The probe used to carry out the above-described method has a rigid hollow body in which a semi-rigid tube is axially slidable. The probe can be driven through the ground and then partially retracted, to form a hole of known dimensions. The flexible tube is axially displaced so that its lower bored extremity is positioned near the bottom end of the hole, while the hollow rigid body of the probe has an annular opening about the tube at the upper end of the hole. The second fluid can then be circulated in the hole between the lower end of the tube and the annular opening of the probe rigid main body.

The invention relates to a method for simulating oil solute transport in a laboratory. The method comprises the following devices: a soil pillar fixing ring, an overflow groove, a universal quick connector, an argil plate, a permeable filter membrane, a universal adjusting pin, a sampling bottle, an air exhaust tube, a branch head, a buffer bottle, an adjustable negative-pressure pump, a data acquisition controller, a signal cable, a sampling bottle, a soil solution sampler, a transparent PVC (polyvinyl chloride) soil pillar and a soil three-parameter sensor. By controlling the change of soil water potential in the soil pillar and promoting the soil solute transport, the method realizes quick observation on the process of the soil solute transport, provides a parameter optimization means for establishing a soil solute transport model, shortens the test period, improves the test precision, ensures more scientific and reliable study results, and provides a test calibration tool for experimental study on liquidity of soil water, energy balance, migration of soil pollutants and the like.

The invention discloses a solid microbial agent used for remedying the soil contaminated by petroleum, belonging to the technical field of bioremediation of soil contaminants. First-class seed liquid of acinetobacter radioresistens and rhodococcus erythropolis are mixed in equal parts after two steps of fermentation in liquid and solid states and cultivation to obtain the solid microbial agent, wherein, the number of effective viable bacteria of acinetobacter radioresistens and rhodococcus erythropolis is 10 to 10 CFU/g. The solid microbial agent in the invention has the advantages of low cost, high number of viable bacteria; the invention further has the advantages that micro-ecological environment improvement of the soil can be improved and secondary contamination cannot be caused to the environment, thus applicable to the bioremediation of the soil which is contaminated by petroleum and petroleum products.

The method of the present invention provides a means to intake hydrocarbon fluid from a subsurface hydrocarbon reservoir, including any accompanying ground water or earthen contaminants, into the subsurface lower end of a tubing system. Compressed gas is then used to purge the hydrocarbon fluid and earthen contaminants from within the tubing system to a hydrocarbon production fluid storage tank or other handling facility at surface.

The invention discloses a continuous microwave soil remediation device, which comprises a feeding machine, a catalytic reactor feeding sieve, conveyer belt, a microwave resonant cavity, microwave generation equipment, exhaust gas recovery equipment, a blast heater, a recovery belt, catalyst recovery equipment and a PLC control center. According to the invention, with the combination of microwave and thermal desorption and with the assistance of aerodynamic force, soil pollutants are separated at the minimum energy consumption and at the fastest speed. When in use, the device provided by the invention has characteristics of high efficiency, easy operation, safety, reliability, environmental protection and the like.

The invention discloses a soil environment quality hierarchical discrimination method of reclaimed land hierarchical safe utilization. According to the method, two soil safety thresholds based on the sanitation and the safety of agricultural products are set: the threshold I and the threshold II; three types of safe utilization approaches are specified according to the corresponding pollution risk level of the two thresholds: the priority farming area, the restricted farming area and the ecological control area; and the final value of the threshold II of the soil pollutant is determined by constructing the quantitative relation between the crop pollutant content and the soil pollutant concentration through the pot experiment. The numerical interval of the threshold I and the threshold II is large, the range of application is wide and operability is high so that the local cultivated land resources can be supplemented to the greatest extent. According to the method, the quantitative relational expression between the soil and the crop pollutant content is constructed through the pot experiment so that the reliable technical route and method can be provided for researching and formulating the localized soil environment quality standards for the reclaimed lands for all the regions by combining the local soil pollution characteristics, the land reclamation requirements, the crop planting habits and other factors.

The present invention provides devices or systems and a method for remediating a soil comprising contaminants, comprising the steps of:—introducing in said soil at least one perforated column for contaminant extraction from a contaminated region of said soil; in close proximity of said at least one perforated column introducing at least one non-perforated column for providing heat to said contaminated region of said soil; providing heat to said at least one non-perforated column; extracting said contaminant vapor containing said soil contaminants out of said contaminated region of said soil into said at least one perforated column; removing said contaminant vapor from said at least one perforated column, thereby providing remediated soil; wherein said at least one perforated column and said at least one non-perforated column are connectable to at least one surface-located device comprising a combustion, a heating and control unit for heating and thereby cleaning said soil.

A method for prescribing action to maintain a land area within a predetermined performance zone is disclosed herein. The method results in prescribing an action for the land area. The method measures soil salinity, soil temperature, soil moisture, air temperature, soil pollutant content, soil nutrient content, and the like.

The invention provides a test method, which includes the following steps: distilling soil in pH<2 acidic medium, hydrogen cyanide is formed, absorbing with the sodium hydrate solution, and analyzing total cyanide in soil with isonicotinic acid-barbituric acid spectrophotometry. The invention has the advantages of good sensitivity and good repeatability, which provides a convenient and reliable method for analyzing total cyanide in soil, and meets the needs of soil pollutant analysis as well as research work.

The invention relates to an earthworm strengthening repair method of soil polluted by phenanthrene, pyrene or pentachlorophenol, belonging to the treatment field of soil environment pollution and comprising the following steps: (A) measuring the content of the phenanthrene, pyrene or pentachlorophenol in soil at regular intervals; (B) adding earthworm or the earthworm and straw or the earthworm and a golden weeping willow. The earthworm is M.guillelmi geophagy earthworm, and is singly thrown mutually or thrown together with the golden weeping willow or thrown together with the straws. In the step B, 4-6 golden weeping willows are planted when the content of the phenanthrene, the pyrene and the pentachlorophenol is 5, 50 and 1mg/kg per square meter oil. The earthworm adopted by the invention can greatly improve the quality of cultivated soil and increase the agricultural reuse value of the soil while rapidly removing soil pollutants; the invention is harmonious with the natural ecologyprocess, and combines the earthworm repair with woody plants repair further so that organics are absorbed and utilized by the woody plant while the organics are metabolized.

The invention discloses an evaporator for performing plant bionic remediation on contaminated soil and belongs to the technical field of soil remediation. The evaporator comprises an evaporator body and evaporator fiber materials. The evaporator body is of a cavity structure, an opening is formed in the lower end of the evaporator, a through hole is formed in the center of an upper end cover, multiple arc-shaped through holes are uniformly formed around the through hole in the center, and each arc-shaped through hole communicates or does not communicate with the through hole in the center. Pipe clamps are mounted on the inner side wall of the cavity of the evaporator body. The evaporator fiber materials penetrate through the arc-shaped through holes and are uniformly distributed along the arc-shaped structures of the arc-shaped through holes. The evaporator is used by being combined with a plant bionic device, and the lower ends of the evaporator fiber materials make contact with a filler remediation agent in a plant bionic remediation device body. The transfer of soil moisture and soil contaminants is improved through the evaporator, so that the rate of the plant bionic remediation is increased and effects of the plant bionic remediation are improved.

The invention discloses a device and a method for restoring a uranium-polluted region by adopting the comprehensive united technology, belonging to the field of uranium-polluted environment restoring technologies. The device is composed of a suction system, an electrokinetic remediation system, a leaching system, a restoring separation system and a reinjection system; the chemical technology, the electrokinetic remediation technology and the photolysis restoration technology are combined to restore the uranium-polluted region in a united manner; the method comprises the steps of extracting the pollutant-uranium from the uranium-polluted region to enable uranium in an ionic state to be extracted into a solution phase from a soil phase; adopting the electrokinetic remediation technology to drive the soil pollutant-uranium to be enriched nearby an anode; and sucking polluted groundwater in a phreatic layer, and carrying out photolysis restoration and separation to the polluted groundwater and the polluted soil, backfilling the restored soil nearby the anode region, and recharging the restored groundwater into a recharge well. The restoration device adopting the comprehensive united technology can effectively reduce the content of uranium in polluted soil and groundwater, can recycle the uranium, and has a clean treatment process without secondary pollution.

The invention relates to a soil contaminant detection method in the field of environment analysis, specifically to a method for analyzing the contents of three different occurrence forms of organic pollutants in soil. Directed at the problem that conventional methods which usually evaluate the contamination degree of soil on the basis of the total concentration of organic pollutants is not scientific enough, the method provided by the invention employs a pretreatment method consisting of Tenax resin adsorption, extraction with an organic solvent, alkaline and thermal hydrolysis and re-extraction with the organic solvent for graded extraction and cooperatively uses gas chromatography, combined gas chromatography and mass spectrometry, liquid chromatography and liquid chromatographic-gas chromatographic apparatus detection and analysis technology, so the contents of three different occurrence forms, including a soluble form, an adsorption form and a bound form, of organic pollutants in soil are detected. The method provided by the invention can accurately and quantitatively analyze the contents of the three different occurrence forms of organic pollutants in soil and has good application value in soil contamination risk evaluation and pollution abatement and restoration.

The present invention is a method of remedying contaminated soil comprises: providing microorganisms capable of degrading soil contaminants to contaminated soil, in which the microorganisms is supported on a carrier; and providing nutrients for the microorganisms to the contaminated soil on the condition that the nutrients can be gradually released, and a microorganism preparation for remedying soil.

The invention discloses a control method of a cultivated soil monitoring system. The soil monitoring system comprises a soil monitoring module, a wireless transmission module, a control module, a display module and an alarming module, wherein the soil monitoring module comprises a plurality of soil monitoring units; the soil monitoring units comprise a temperature sensor, a GPS (Global Positioning System) positioning unit, a humidity sensor, a soil pH (Potential of Hydrogen) sensor, a heavy metal electrochemical sensor array, a heavy metal signal adjusting circuit and a microcontroller. In a working process, the control module is used for controlling the display module to display soil quality information of each soil monitoring unit; and when a heavy metal concentration is higher than a pre-set heavy metal concentration threshold value or the soil pH is not in the soil quality information with the pre-set heavy metal concentration threshold value range, the display module is controlled to distinctly display the soil quality information and alarming module is controlled to alarm. The soil monitoring system is simple in structure and can be used for reflecting the concentration of cultivated soil pollutants in real time.

The invention discloses a restoration method for degrading soil PCP residue through the cooperation of earthworms and microbes. The invention belongs to the technical field of soil pollutant restoration. According to the restoration method provided by the invention, eisenia foetida and/or amynthas robustus are placed in polluted soil, and fermented chicken dung and/or cow dung is added simultaneously; the fermented chicken dung and/or cow dung is sufficiently mixed with soil; and fermented chicken dung and/or cow dung is added again every three months. With the restoration method provided by the invention, soil PCP elimination and detoxification can be accelerated, various soil physicochemical properties can be improved through the movement of the earthworms, soil organic matter decomposition can be accelerated, reaction conditions of detoxification of other pollutants can be optimized, and form transformation and degradation reactions of other pollutants contained in soil can be biologically catalyzed.

The treatment of contaminated waters or soils by an oxidizing agent and a catalyst is described. The addition of silica as a catalyst to an oxidizing agent with or without an additional metal catalyst showed a greater remediation effect. Subsequent normal bacterial processes are unimpeded since the treatment process does not leave residual chemicals.

The invention provides an agricultural land soil environment quality early warning management system. The agricultural land soil environment quality early warning management system comprises an agricultural land soil environment quality database, a geographic information system (GIS) platform and a soil pollutant content information query and release platform, the soil pollutant content query andrelease platform integrates characteristic pollutant flux information, regional environment information and agricultural land soil environment quality early warning based on the geographic informationsystem GIS platform on the basis of integrated management of the agricultural land soil environment quality database. The soil pollutant content information query and release platform is used for making a vectorized heat map; and the spatial distribution is superposed with different pollution degrees on the Baidu map, the soil pollution degrees of the agricultural land are visually displayed at different positions, and a typical regional soil environment quality early warning system is established on the basis, thereby realizing dynamic supervision and early warning of the regional agricultural land soil environment quality. According to the invention, a risk information query and release platform is constructed based on a GIS platform.

The invention relates to the technical field of pollution treatment, and in particular relates to an accurate targeted remediation method and accurate remediation system for polluted soil through soiltesting formulation. The method comprises the following steps: acquiring distribution data of pollutants in different positions of the soil in the polluted area; calculating a three-dimensional depiction of contents of soil pollutants in the polluted area according to the distribution data of the pollutants; calculating an injection position and injection amount of a remediation preparation in the soil in the polluted area according to the three-dimensional depiction of the contents of the soil pollutants in the polluted area; and injecting the remediation preparation into the soil in the polluted area according to the calculated injection position and injection amount. The method provided by the invention accurately determines the amount of the remediation preparation, the injection position of the remediation preparation and the injection frequency according to sampling detection in the polluted area, improves the remediation efficiency, reduces the remediation costs, and reduces secondary pollution to the environment.

The object of the present invention is a composition of bacterial strains which may comprise Stenotrophomonas sp. strain 2L, Stenotrophomonas sp. strain 5L, Stenotrophomonas sp. strain 6L, Stenotrophomonas sp. strain 3N, Achromobacter sp. strain 4P, Arthrobacter sp. strain 1N, Brevundimonas sp. strain 2N, Brevundimonas sp. strain 5N, Brevundimonas sp. strain 6N, Pseudomonas sp. strain 3G, and Pseudomonas sp. strain 4, deposited under the number KKP 2041p (IAFB Collection of Industrial Microorganisms—Institute of Agricultural and Food Biotechnology in Warsaw), a bioremediation vaccine (bioremediation mixture) which may comprise the composition of these strains, the use of the vaccine in the removal of contaminants from the soil, and the method for the treatment of contaminated soil.

The invention relates to a cyclone type soil washing method with undercurrents connected in series. The cyclone type soil washing method with the undercurrents connected in series comprises the steps that screened micro soil particle suspension liquid is stirred and washed; the micro soil particle suspension liquid flows through two or multiple segments of hydrocyclones with the undercurrents connected in series, and a solid-liquid mixer group is installed in front of a cyclone system, so that the purposes of enhancing desorption of small-particle-size cohesive soil pollutants in the soil slurry, improving the desorption capacity and conducting densification on the undercurrents are achieved; and in each segment, corresponding structures are designed according to actual working conditions to achieve the best operation condition so that cost can be lowered, and efficiency can be improved. By the adoption of the cyclone type soil washing method with the undercurrents connected in series, deep separation between waste water and large-particle soil in the soil slurry is achieved, and the purpose of recycling detergent is achieved; and device parameters can be adjusted and optimized according to actual conditions, pollutants containing heavy metal, organic matter and the like are effectively eliminated, and the defects of existing methods for soil washing, desorption and densification are overcome.