1958 results about "Soil remediation" patented technology

The invention relates to the technical field of soil pollution identification, and discloses a soil heavy metal pollution identification system. A multispectral remote sensing sensing module of the system obtains surface reflectance data and soil in-situ spectral data through a satellite load and a vehicle-mounted mobile platform respectively, and the surface reflectance data and the soil in-situ spectral data are processed by a heterogeneous data fusion gateway to generate multiband spectral response signals. In the pollution risk assessment module, a spatial distribution analysis unit outputs a heavy metal spatial distribution map, a migration risk prediction unit generates a pollution migration probability cloud map in combination with meteorological and hydrological data, and a pollution threshold defining unit outputs a soil remediation safety threshold. In the treatment decision execution module, an in-situ remediation execution unit adjusts passivator injection parameters, a pollution source management and control unit regulates pollution source blocking equipment and collects monitoring signals, and a three-dimensional dynamic early warning platform generates a comprehensive pollution risk index. According to the system, the cooperative operation of soil heavy metal pollution identification, evaluation and treatment is realized.

The invention discloses a bio-organic fertilizer for repairing heavy metal cadmium in soil and a preparation method of the bio-organic fertilizer, and belongs to the technical field of organic fertilizers. The organic fertilizer is prepared from the following raw materials in parts by weight: 7-12 parts of a compound microbial agent, 30-40 parts of modified charcoal, 3-8 parts of sodium alginate, 6-8 parts of a chelating agent and 60-80 parts of decomposed edible fungus residues. The compound microbial agent is prepared from potassium-solubilizing paenibacillus mucilaginosus MSSW02, pseudomonas plecoglossicida and bacillus aryabhattai; the chelating agent is composed of calcium humate and nano-hydroxyapatite according to the mass ratio of 100: (3-5). The multi-component synergistic effect is achieved, the content of heavy metal in soil is effectively reduced, especially the content of heavy metal Cd, meanwhile, rich organic matter is contained, the physical and chemical properties of the soil can be remarkably improved, the water and fertilizer retention capacity of the soil is improved, and crop growth is promoted; the remediation effect on medium-light cadmium polluted farmland soil is good, and the growth promoting effect on crops is remarkable.

The invention relates to the technical field of in-situ / ex-situ remediation of sites polluted by heavy metals such as cadmium, lead, copper and zinc, and discloses a heavy metal polluted soil remediation system and method based on intelligent management and control. The system comprises an electrode system module, an activator module, a targeted adsorption device module, an automatic monitoring system module, an intelligent decision-making system module and a photovoltaic power supply module. The method comprises the steps of driving heavy metal ions in soil to directionally migrate through an electric field; the activating agent module works, green micromolecule organic acid and other activating agents are injected in a gradient mode, and the migration efficiency of heavy metal is improved; activated heavy metal ions can be captured by an adsorption material in the targeted adsorption device module in cooperation with a selective enrichment device; meanwhile, the automatic monitoring system module collects environmental parameters in real time; the intelligent decision-making system module optimizes the remediation efficiency and energy consumption according to the real-time data, and low-cost and high-efficiency remediation of soil heavy metal pollution is achieved. The remediation efficiency is remarkably improved, and the risk of secondary pollution is reduced.

The invention relates to the technical field of environmental governance and remediation, in particular to a combined contaminated site soil remediation data management method, which comprises the following steps of: firstly, integrating multi-source heterogeneous data through a unified space-time coordinate system to generate a fusion data pool, and then driving a pollution assessment model to generate a multi-dimensional space-time pollution map; and then intelligently matching a candidate repair process chain based on an associated knowledge base, performing iteration deduction through a dynamic multi-objective optimization engine to obtain an optimal repair scheme, converting the optimal repair scheme into a digital regulation and control instruction, and finally monitoring an execution state and environmental response data in real time and feeding back and updating a data pool to realize closed-loop optimization. According to the method, the data quality and the pollution evaluation accuracy are improved, the adaptability of the repair process and the cost performance of the scheme are optimized, the repair effect is ensured to be stable and reach the standard, and the efficiency and reliability of the repair project are improved.

The invention discloses an ecological restoration effect evaluation and simulation system after polluted soil restoration, and relates to the technical field of soil restoration, and the system comprises a soil feature generation module which generates an ecological feature data set; the ecological restoration evaluation module is used for establishing a multi-dimensional evaluation model by using an analytic hierarchy process and a fuzzy comprehensive evaluation method based on the ecological characteristic data set, and generating an ecological restoration effect index; the dynamic simulation prediction module is used for constructing an ecological restoration dynamic simulation model and simulating the evolution trend of a soil ecological system under different environment conditions; and the restoration strategy optimization module is used for generating a targeted ecological restoration optimization scheme by combining a preset restoration strategy library according to the ecological restoration effect index and the dynamic simulation prediction result. According to the method, a closed-loop system integrating multi-source data acquisition and processing, multi-dimensional evaluation, dynamic simulation prediction and stepped strategy optimization is constructed, and accurate evaluation of the ecological restoration effect after contaminated soil restoration and scientific optimization of the restoration strategy are achieved.

The invention relates to the technical field of fertilizer preparation, and discloses an ecological balance fertilizer for yield increase and disease resistance of peanuts and a preparation method of the ecological balance fertilizer. The preparation process comprises the following steps: constructing a PLGA core containing trichoderma harzianum spores and magnesium carbonate through a micro-fluidic chip low-temperature water-in-oil emulsion method; coating bacillus amyloliquefaciens and potassium silicate with ultraviolet-induced cross-linked temperature-sensitive hydrogel to form a middle layer; loading rhizobium by using aminated mesoporous S < iO2 >, and spraying and assembling an enzyme response shell through a fluidized bed; finally, the hydroxyapatite nanorod and a binder are combined and granulated and formed through a fluidized bed. Precise controlled release of functional bacteria and nutrients is realized by constructing a temperature-sensitive-enzyme response type release system, and the activity of a fungicide is guaranteed to be preserved by virtue of trichoderma harzianum-rhizobium synergistic interaction and silicon bond linkage soil remediation in combination with a low-temperature fluidized bed process, so that a'fertilizer-bacterium-soil 'ecological cycle system is finally constructed.

The invention relates to the technical field of soil environment monitoring, and discloses a soil remediation construction site environment monitoring method based on edge computing cloud collaboration. The method comprises the following steps: deploying an edge computing node at a restoration construction site, and collecting real-time data of soil humidity, heavy metal concentration, volatile organic compound content and meteorological parameters through a multi-source sensor; inputting the data into a spatio-temporal feature extraction network, and generating a spatio-temporal fusion feature matrix by means of hierarchical convolution and a cross-channel attention mechanism; on the basis of the matrix, the index anomaly probability is calculated by using a depth probability network, and a risk feature sequence with uncertainty measurement is generated; constructing a dynamic risk field model in combination with repair process parameters, and predicting a pollution diffusion path through a space-time propagation algorithm; and in combination with an equipment operation state, an edge side local regulation and control instruction and a cloud global optimization strategy are generated by a collaborative decision engine, and efficient and accurate environment management requirements of a construction site are met.

The invention relates to the technical field of soil remediation management, in particular to a method and system for soil remediation and digital management, and the method comprises the steps: data construction: fusing multi-source monitoring soil environment parameters with space-time background data such as a GIS layer and a meteorological time sequence to form a data set; state quantification: outputting a comprehensive state index for quantifying restoration urgency and complexity through the soil health assessment model; scheme generation: matching the restoration target library and the resource library, and generating a digital restoration scheme containing an expected state trajectory through an optimization algorithm; closed-loop control is carried out, feedback data comparison tracks are continuously collected, if the deviation exceeds a threshold value, the index is recalculated, the scheme is dynamically adjusted, and the system comprises a data construction module, a state quantification module, a scheme generation module and a closed-loop control module and executes the method. According to the method, the data reliability and evaluation scientificity are improved, the scheme adaptability is guaranteed, dynamic and controllable remediation is realized, and digital and efficient management of soil remediation is promoted.

The invention discloses a method for restoring soil heavy metal pollution by coupling soybean urease with a charcoal cementing agent, and relates to the technical field of soil heavy metal pollution restoration, and the method comprises the following steps: dynamic microbiome regulation and control: introducing photosensitive protein into soil functional bacteria; the acyl homoserine lactone analogue is synthesized and applied to soil, and is competitively combined with a microbial quorum sensing receptor to block an inhibitor to secrete a signal channel; according to the method, microbial urease secretion is regulated and controlled through optogenetics, an inhibitor signal is blocked through quorum sensing interference, and a microbiome is precisely regulated and controlled; the pH-responsive nanocapsule releases an inhibitor in a targeted manner, and the magnetic-responsive nanochain dynamically captures interfering bacteria, so that the limitation of passive adsorption is broken through; the gene editing plant releases coumarin to inhibit fungal metabolism, and the engineering mycorrhizal fungi physically shields an inhibitor to construct cross-biosphere cooperative defense; the urease activity and the heavy metal removal rate are remarkably improved, meanwhile, the soil microbial diversity is maintained, and the soil specificity interference problem is solved.

The invention belongs to the technical field of environment, and particularly relates to an environment-friendly biological agent for repairing and treating petroleum polluted water and soil and a preparation method of the environment-friendly biological agent. The biological agent is prepared by mixing a compound microbial agent, a biological surfactant and an auxiliary material in parts by mass, has the characteristics of high efficiency, environment friendliness and no secondary pollution, can remarkably improve the remediation efficiency of petroleum-contaminated soil, and has a wide application prospect.

The invention relates to the technical field of soil remediation, and discloses a method for synergistically remediating organic contaminated soil by combining microorganisms with plant root systems, which comprises the following steps: carrying out physicochemical property detection and condition adjustment on the contaminated soil in a target remediation area; applying a composition containing functional microorganisms and a controllable release activation component to the contaminated soil; plants with rhizosphere secretion ability are planted in the restoration area; plant root exudates are used for inducing the composition to release active components, so that microorganisms are activated, and organic pollutants are jointly degraded; and maintaining the repair cycle, and performing process regulation and control until the repair is completed. A double-layer microcapsule structure is constructed, the outer layer adopts chitosan and an induction material, and the outer layer can swell or disintegrate under the action of plant rhizosphere secretions, so that responsive release of active components of the inner layer is achieved, and the effect of improving release accuracy and microbial activation efficiency is achieved.

The invention relates to a real-time monitoring method for soil remediation by utilizing multi-spectrum of an unmanned aerial vehicle and sensing coupling of the Internet of Things, and belongs to the technical field of soil environment monitoring and remediation. The method comprises the following steps: constructing a space grid model of a monitoring area; a space-air-ground integrated monitoring network is arranged, image data are obtained through multi-spectral remote sensing of an unmanned aerial vehicle, and soil environment parameters are collected through a ground Internet of Things sensor; preprocessing and fusing the multi-source spatio-temporal data, and establishing a spatio-temporal matching model; constructing an inversion model of the soil heavy metal content, the organic matter content and the pollutant degradation degree based on the fusion data; and the repair efficiency is dynamically calculated and visualized, and real-time evaluation and early warning of the repair process are realized. According to the invention, space-air-ground data collaboration is realized, the real-time performance, accuracy and space coverage of monitoring are remarkably improved, the defects of high cost, low efficiency and limited data dimension of a traditional method are overcome, and whole-process and intelligent decision support is provided for soil remediation.

The invention discloses a soil remediation effect dynamic evaluation system and method based on deep learning. The system comprises a data acquisition module, a data preprocessing module, a deep learning model module, a dynamic evaluation module, an optimization suggestion module, a visual interaction module, a data storage module and a communication module. The data acquisition module is used for acquiring multi-source monitoring data in a soil remediation process in real time, and the multi-source monitoring data comprises pollutant concentration data, soil physicochemical property data, microbial activity data and meteorological environment data. Dynamic evaluation of the soil remediation effect is achieved through the deep learning technology, the defects that a traditional method is poor in real-time performance and depends on manpower are overcome, the system can automatically collect and analyze multi-source data during implementation, high-precision remediation effect evaluation and trend prediction are provided, and optimization of a remediation strategy is helped; in addition, the remediation effect can be reflected more comprehensively, and a scientific basis is provided for environmental governance.

The invention relates to the technical field of soil remediation, in particular to a soil remediation formula optimization method based on solid waste raw material charcoal improvement, which comprises the following steps: acquiring a coal gangue powder material flow and a sludge material flow, respectively performing component detection on a soil sample set, the coal gangue powder material flow and the sludge material flow to obtain a component content report, performing multi-factor combination on the plurality of biochar, the plurality of microbiota and the plurality of enrichment plants to obtain a plurality of first initial raw material combinations; and constructing a plurality of unit soil remediation experiment groups based on the component content report, the plurality of first initial raw material combinations, the soil sample set, the coal gangue powder material flow and the sludge material flow, and performing a soil remediation experiment on the plurality of unit soil remediation experiment groups based on a preset test pause condition to obtain an optimal scheme. According to the invention, the formula optimization of targeted soil remediation can be realized by utilizing the charcoal, the coal gangue and the municipal sludge.

The invention provides a biochar composite porous material for heavy metal contaminated soil remediation and a preparation method and application of the biochar composite porous material. The preparation method comprises the steps that biomass raw materials are subjected to high-temperature pyrolysis carbonization and then smashed, ground and sieved, and biochar powder is obtained; dispersing in a phosphoric acid solution to obtain a biochar solution, and filtering, washing and drying after a hydrothermal activation reaction to obtain activated biochar; dispersing in a chitosan solution, carrying out ultrasonic oscillation, filtering, washing and drying to obtain modified charcoal; mixing sodium bentonite, attapulgite and deionized water, uniformly mixing the modified charcoal, the functional slurry and a sodium carboxymethyl cellulose solution to obtain composite slurry, performing compression molding to obtain a green body, and then drying and calcining the green body. The biochar composite porous material prepared by the invention can simultaneously play multiple roles of physical adsorption, chemical chelation, ion exchange and the like in a heavy metal contaminated soil treatment process, so that efficient fixation of various heavy metal ions is realized.

The invention relates to the technical field of soil remediation, in particular to a soil ecological remediation agent based on coal gangue-fly ash and a preparation method of the soil ecological remediation agent. The soil ecological restoration agent comprises the following components in parts by weight: 40-50 parts of coal gangue-fly ash mixed powder, 6-12 parts of a microbial agent, 15-20 parts of humic acid, 6-12 parts of sodium polyacrylate, 8-12 parts of straw carbon, 20-25 parts of bentonite and 4-6 parts of aluminum sulfate. The soil ecological restoration agent can supplement trace elements into soil, meanwhile, the coal gangue-fly ash can adsorb heavy metals in the soil so as to fix the heavy metals, the microbial agent can be loaded on the surface of the coal gangue-fly ash, the heavy metals adsorbed on the coal gangue-fly ash are precipitated through the microbial agent, and the heavy metals adsorbed on the coal gangue-fly ash can be fixed. The concentration of heavy metal ions in the soil is reduced.

The invention relates to the technical field of remediation for synergistic treatment of rice field soil arsenic and greenhouse gas emission reduction, in particular to a zero-valent manganese nitrate synergistic soil remediation agent and application thereof to remediation of rice field arsenic pollution and inhibition of greenhouse effect. The invention provides a technical scheme for synergistically repairing arsenic pollution in the rice field and inhibiting the greenhouse effect based on zero-valent manganese / nitrate, an electron transfer shunt network driven by manganese circulation is constructed, a slow release reaction-dynamic regeneration-electron shunt three-in-one system is constructed, and synergistic interaction of arsenic fixation and greenhouse gas emission reduction is realized. According to the technical scheme, the potential regulation and control contradiction between arsenic fixation aerobic and carbon reduction anaerobic is successfully broken, and an innovative solution is provided for multi-target remediation of rice field soil. According to the self-sustaining circulating system, the specific surface area of the manganese oxide is stabilized at 50m < 2 > / g to 120m < 2 > / g, and the regeneration rate is gt; 95%. Experiments show that compared with a single technology, the synergistic treatment group improves the arsenic fixing efficiency to 100%, and the comprehensive emission reduction intensity of greenhouse gas reaches 76%.

The invention discloses a fermentation device of an organic fertilizer for soil remediation, and relates to the technical field of fermentation devices, the fermentation device comprises a fermentation tank, one side of the top of the fermentation tank is provided with a connecting pipe, the bottom of the fermentation tank is provided with a support frame, the fermentation tank is internally provided with a stirring mechanism, and the stirring mechanism is used for executing an opposite flow operation on a fermentation raw material in the fermentation tank. According to the fermentation device of the organic fertilizer for soil remediation, the overturning plate moves and rotates in the vertical direction in the rotating process, so that fermentation raw materials can be overturned, and the raw materials are displaced and mixed in the vertical direction; the cross-shaped stirring plate rotates while moving in the vertical direction to further stir the raw materials, and the cross-shaped stirring plate and the cross-shaped stirring plate cooperate with each other to stir the raw materials from different directions and angles, so that multi-dimensional mixing of the raw materials is realized, the raw materials are mixed more uniformly, full contact between microorganisms and the raw materials in the fermentation process is facilitated, and the fermentation effect is improved.

The invention relates to the technical field of soil remediation, in particular to a charcoal-fungus symbiont for a freeze-thaw environment and a preparation method and application of the charcoal-fungus symbiont. The preparation method of the charcoal-fungus symbiont comprises the following steps: crushing a biomass raw material, and carrying out pyrolysis to prepare basic charcoal; placing the basic biochar in an iron oxide solution, and carrying out an iron oxide loading reaction to obtain iron oxide biochar; the preparation method comprises the following steps: dipping iron oxide biochar in a chitosan solution for coating modification, then continuously adding a cross-linking agent for cross-linking solidification, and freeze-drying to obtain chitosan-iron oxide composite modified biochar; and immersing the chitosan-iron oxide composite modified biochar into a bacterial suspension of functional microorganisms, oscillating and adsorbing, and freeze-drying to obtain the carbon-bacteria symbiont. The invention aims to improve the heavy metal pollution phenomenon of soil and the soybean root rot disaster in the freezing and thawing cycle environment at the same time.

The invention relates to the technical field of soil remediation, in particular to a biochar-humic acid-calcium alginic acid composite saline-alkali soil modifier and a preparation and application method thereof. The modifier adopts a multi-layer structure design: biochar is pre-adsorbed by calcium chloride, compounded with sodium humate, and then crosslinked with sodium alginate to form a gel to form a composite inner core; secondly, sulfobetaine methacrylate and vinyl phosphonic acid are introduced into a sodium alginate molecular chain through graft polymerization, and modified sodium alginate is obtained to serve as an outer layer coating material; and finally, dipping the composite inner core into the outer layer solution, and carrying out graded recalcification by calcium chloride and short-time treatment by sodium sulfate to obtain a final product. Through the synergistic effect of calcium ion slow release of the inner core and zwitterionic characteristics of the outer layer, efficient replacement and long-term stable regulation and control of soil sodium ions are achieved, the pH value, the conductivity and the alkalization degree of soil are remarkably reduced, the water holding capacity is effectively improved, and the soil conditioner is suitable for sustainable improvement of moderate and severe saline-alkali soil.

The invention relates to the technical field of soil image processing, in particular to a vegetation detection method and system for soil environment restoration. According to the method, color features and position distribution features of pixel points are analyzed, a vegetation coverage factor of each superpixel block is obtained, and vegetation coverage blocks are screened out; according to the position distribution of the pixel points in each vegetation coverage block and the chromaticity fluctuation characteristics, the artificial cultivation characteristic degree of each vegetation coverage block is obtained; according to the centroid position and the vegetation coverage factor of each superpixel block, obtaining a vegetation coverage class cluster and a non-vegetation coverage class cluster; and in combination with the relative position between each vegetation coverage block in each non-vegetation coverage class cluster and each vegetation coverage block in the adjacent vegetation coverage class cluster, obtaining the soil remediation vegetation significance of each super-pixel block, and further obtaining the soil remediation weighted significance of each super-pixel block. According to the method, the vegetation characteristics in the soil environment restoration process are accurately analyzed, so that the accuracy of soil environment restoration assessment is improved.

The invention provides a soil remediation modifier, a soil remediation method and a soil maintenance method, and belongs to the technical field of soil remediation. The soil conditioner is prepared from the following raw materials in parts by weight: 40-50 parts of modified sludge, 10-15 parts of humic acid, 5-10 parts of a bioactive component, 10-15 parts of an inorganic component and 10-15 parts of an organic component. The soil remediation agent prepared by the invention not only can increase the total porosity of soil, improve soil water stability granules and soil structure, but also can improve soil fertility, improve soil pH value and passivate heavy metal ions, so that the prepared remediated soil can adapt to plant growth requirements, and meanwhile, the sludge and the traditional Chinese medicine residues are subjected to resource utilization, waste is turned into wealth, and the cost is reduced. Wide application prospects are realized.

The invention relates to the technical field of soil remediation, and provides a soil pollution remediation process which comprises the following steps: distributing points in grids of an area to be remediated, measuring the content of heavy metals and the concentration of organic pollutants, applying multi-frequency microwave radiation, synchronously applying ultrasonic treatment, and injecting a complex microbial inoculant containing sphingomonas, aspergillus niger spores and a nitrogen and phosphorus nutrient solution. A direct-current electric field is applied, pH, oxidation-reduction potential Eh and temperature parameters are monitored and measured in real time through an embedded sensor, a repair by-product recovery system is arranged, the purity of recovered metal is not lower than 98%, and mobile repair equipment is used in a matched mode. According to the method, the pollution degree is accurately quantified by constructing the pollution index PI, and dynamic regulation and repair are realized in combination with real-time monitoring parameters of a sensor. The pollutant removal efficiency is improved through the synergistic effect of multiple technologies, metal resource recovery is achieved through a repair by-product recovery system, traditional problems are solved, and efficient and environment-friendly repair is achieved.

The invention discloses a soil remediation device, and relates to the field of environmental protection, the soil remediation device comprises a remediation cylinder, a supporting roller is fixedly arranged on the circumferential outer wall of the remediation cylinder, a transmission gear is mounted on one side of the supporting roller, a feeding cylinder is fixedly arranged at one end of the remediation cylinder, a connecting disc A is fixedly arranged at the other end of the remediation cylinder, and a drying pipe is inserted into the remediation cylinder in a penetrating manner; a disturbance wall scraping mechanism is fixedly arranged on the outer side wall of the drying pipe, a connecting disc B is fixedly connected to the end of the connecting disc A, a filter cylinder is fixedly connected to the end of the connecting disc B, an air spraying pipe is arranged on the disturbance wall scraping mechanism, a material turning piece is fixedly arranged at the end of the air spraying pipe, and a disturbance piece is fixedly connected to the end of the material turning piece. According to the soil remediation device, the technological process is simplified, and the investment cost is reduced; the heat and mass transfer efficiency is enhanced, the specific surface area of crushed small-particle materials is increased, high-temperature gas can make more sufficient contact with the materials, and thorough drying work is achieved after hardened soil is crushed.

The invention relates to a mine solid waste-based composite saline-alkali soil modifier as well as a preparation method and application thereof, and belongs to the technical field of soil remediation and solid waste recycling. The modifier is prepared from volcanic rock solid waste, rice husk and mussel shell as raw materials through oxalic acid activation, microbial fermentation carbonization and humic acid chelation, and comprises 50-70 parts of activated stone powder-containing porous particles, 20-30 parts of rice husk-based charcoal, 10-20 parts of humic acid chelated magnesium-calcium powder and 3-5 parts of a composite binder. The preparation method comprises the following steps: ultrasonically activating the stone powder oxalic acid, and puffing and granulating with the binder; inoculating the rice hulls with salt-tolerant bacillus and actinomycetes for aerobic fermentation and carbonization; and the shell is activated by oxalic acid and then is loaded with a humic acid calcium magnesium compound. The modifier is applied according to 50-200kg / mu, so that the nutritional ingredients and the air permeability can be improved. According to the method, solid waste recycling, solid waste consumption and landfill cost and CO2 emission reduction are achieved, and the method is suitable for ecological restoration of the coastal saline-alkali soil and has both environmental protection and economic benefits.

The invention relates to the field of organic fertilizer manufacturing, in particular to a preparation method of a humic acid-containing water-soluble organic fertilizer with chelated medium trace elements for synergism, and the preparation method comprises the following steps: S1, adding modified humic acid into deionized water, heating to 40-50 DEG C, stirring for 25-35 minutes, adding hydrated ferrous sulfate, introducing compressed air, and stirring for reaction for 30-50 minutes to obtain a chelating solution and the like; according to the invention, the environmental adaptability of humic acid is improved through molecular structure modification, a composite chelation system is constructed to enhance element stability, a multistage chelation sequence is optimized to prevent ion antagonism, and a physical barrier is innovated to realize a core process path of intelligent controlled release. The functional limitation of a traditional fertilizer in a complex agricultural ecological system is effectively broken through, the nutrient utilization efficiency and agricultural sustainability are remarkably improved, and the fertilizer has wide application prospects in soil remediation, precision agriculture and resource-saving planting systems.

The invention relates to a soil pesticide residue detection method, system, equipment and medium, and relates to the technical field of intelligent detection.The method comprises the following steps that a to-be-detected soil sample is subjected to ultrasonic-assisted extraction, and a pesticide extracting solution is obtained; separating and detecting the extracting solution by using a liquid chromatograph to obtain a pesticide chromatographic peak, and performing integral calculation on concentration data; calculating the adsorption capacity based on the concentration data, generating a pesticide distribution diagram, and obtaining a pollution range diagram through spatial interpolation; determining a pesticide degradation rate according to the pollution range map, obtaining half-life period data, and further calculating an exposure dose; residual toxicity effect analysis is carried out based on the exposure dose, a toxicity effect score is obtained, a corresponding soil remediation scheme is formulated according to the score, and the technical problem that pollution risk assessment is lagged due to the lack of pesticide adsorption behavior in soil in the traditional technology is solved.

The invention provides a calcium humic acid modified biochar composite material as well as a preparation method and application thereof. The preparation method specifically comprises the following steps: preparing calcium modified biochar powder from biochar powder and a calcium source; mixing humic acid with the calcium modified charcoal powder, filtering and drying to obtain a calcium humic acid modified charcoal composite material; wherein the mass ratio of the humic acid to the calcium modified charcoal powder is 1: (2-20). When the calcium humic acid modified biochar composite material is used as a soil remediation agent for soil remediation, the pH value, the organic matter content and the cation exchange capacity of soil can be improved, the soil hardening degree is relieved, heavy metal lead and cadmium and ions thereof can be immobilized in the modes of ion exchange, electrostatic adsorption, surface complexing, deposition and the like, and the soil remediation efficiency is improved. The soil heavy metal content is further reduced.

The invention relates to the technical field of soil remediation, in particular to a contaminated soil remediation machine and a contaminated soil remediation method.The contaminated soil remediation machine comprises a smashing box, a mixing box and a granulation box, the granulation box is fixedly installed at the bottom of the mixing box, and a granulation mechanism is rotationally installed in the granulation box. A motor drives a driving bevel gear to be matched with a second bevel gear meshed with the driving bevel gear to drive a transmission shaft rod to rotate, the rotating transmission shaft rod drives a granulation mechanism to operate and a transmission rod to rotate through the second bevel gear at the top, and the rotating transmission rod drives a stirring paddle to rotate to fully mix soil and a medicament; the rotating transmission rod drives the bevel gear to drive the linkage mechanism to operate, the operating linkage mechanism drives the two crushing rollers to rotate relatively through the face fluted disc connected in an engaged mode, soil to be remediated is crushed, the soil is subjected to uniform granulation treatment through the granulation mechanism, and therefore the efficient, uniform and continuous soil remediation target is achieved.

The invention provides a post-fire soil remediation method. The post-fire soil remediation method comprises the following steps: step 1, fire soil diagnosis and pretreatment; 2, gradient pyrolysis biochar is prepared and applied; step 3, inoculating with a compound microbial agent; 4, nutrient regulation and plant combined remediation. According to the invention, through combined application of gradient pyrolysis biochar, cooperative regulation and control of soil acidity and alkalinity, heavy metals and organic pollutants after a fire disaster are realized, and meanwhile, the survival rate and colonization ability of functional microorganisms in a high-temperature environment are remarkably improved by adopting a carrier embedding technology. According to the method, the remediation period can be effectively shortened, the ecological function of the soil is remarkably restored, the remediation cost is greatly reduced by using localized materials, and the problems that in a traditional remediation technology, adaptability is poor, efficiency is low, and cost is high are solved on the whole.