983results about How to "Good restorative" patented technology

The invention provides a nano-bionic material for tissue repair and a preparation method thereof. The nano-bionic material comprises a nano-bionic bracket and hydrosol attached to the nano-bionic bracket, wherein one or more cell factors and / or cells are coated in the hydrosol. The preparation method of the nano-bionic material comprises the following steps of: preparing an electrospinning solution and a hydrosol solution containing the cell factors and / or the cells; preparing the nano-bionic bracket by using the electrospinning; printing the hydrosol solution containing the cell factors and / or the cells on the nano-bionic bracket by using a ink-jet printer; and the like, and repeating the electrospinning and the ink jet to obtain the nano-bionic material with different thicknesses. By combining with an electrospinning technology and a biological printing technology, the invention combines specific medicines and / or the cell factors and / or the cells in the nano-bracket and / or the surface of the nano-bracket, thereby greatly enhancing the effects of the nano-bionic material on tissue repair and tissue regeneration; in addition, the invention has broad application prospect.

The invention belongs to the technical field of environment protection, and discloses a method for repairing soil polluted by heavy metal by combining chemical leaching and bioremediation. To repair soil with a high heavy metal content and high toxicity, the invention provides the method adopting a strategy of carrying out chemical leaching and bioremediation in sequence. The method comprises the following steps: firstly, classifying different types of polluted soil into seriously polluted soil and mildly polluted soil; then leaching seriously polluted soil by adding acidic chelating agent and extracting high-concentration heavy metal in soil; and conducting bioremediation on part of residual low-concentration polluted soil which is not leached completely. The method is used for in-situ repairing of heavy metal, has an obvious effect in repairing soil polluted by heavy metal, and successfully avoids secondary pollution to soil.

The invention relates to a photo-induced reversible self-repair polyurethane film and a preparation method and a repair method thereof. The polyurethane film mainly comprises 10 to 40 parts of phenolic hydroxyl coumarin derivative, 10 to 50 parts of alkyl bromal compound, 10 to 40 parts of polyisocyanate, and 10 to 30 parts of polyether polyol or polyester polyol. The preparation method comprises the following steps of: generating phenolic hydroxyl coumarin by using the phenolic hydroxyl coumarin derivative and the alkyl bromal compound under the action of absolute potassium carbonate; and reacting the phenolic hydroxyl coumarin, the polyisocyanate and the polyether polyol or the polyester polyol to obtain polyurethane solution, and performing cross linking under the irradiation of ultraviolet with wavelength of 350 nanometers after the film is formed to obtain the polyurethane film. The damaged surface is irradiated through the ultraviolet with wavelength of 254 to 350 nanometers, so that the reduced coumarin monomers are subjected to dimer cross linking reaction again and the purpose of repairing cracks is fulfilled. Compared with the prior art, the polyurethane film has the characteristics of good film forming property and high transparency; and the repair process is simple and has low cost.

The invention provides a nanometer bionic wound-surface cover and a preparation method thereof. The nanometer bionic wound-surface cover comprises a nanometer bionic bracket and hydrosol attached to the bracket, wherein the hydrosol covers one or a plurality of cytokines. The preparation method for the nanometer bionic wound-surface cover provided by the invention comprises the steps of preparingan electrostatic-spinning solution, a cytokine-containing hydrosol solution and a crosslinker solution, preparing the nanometer bionic bracket by use of electrostatic spinning, using an ink-jet printer to print the cytokine-containing hydrosol solution onto the nanometer bionic bracket, and the like, wherein electrostatic spinning and printing can be repeated so as to form the wound-surface covers different in thickness. The preparation method adopts an in-situ autologous stem-cell engineering technique and adopts stem-cell chemotactic factors to attract autologous stem cells to directionally migrate, enter a wound surface and be differentiated according to designed requirements, thereby avoiding inconvenience caused by using viable cells, achieving rehabilitation effects the same with orbetter than that of using the viable cells and having broad application prospects.

The invention provides artificial articular cartilage based on autologous cells and a preparation method thereof. The artificial articular cartilage comprises a nano bionic support and hydrosol adhered to the nano bionic support, wherein one or more cytokines are coated into the hydrosol. The invention also provides the method for preparing the artificial articular cartilage, which comprises the following steps: preparing an electrostatic spinning solution, a cytokine-containing hydrosol solution and a crosslinking agent solution; using the crosslinking agent solution to receive electrostatic spinning so as to prepare the nano bionic support; and using an ink jet printer to print the cytokine-containing hydrosol solution on the nano bionic support, and curing the hydrosol to obtain the artificial articular cartilage. The three-dimensional support adopted by the invention has ideal degradation speed and is degraded after the regeneration of an articular cartilage layer, can meet the requirement of actual clinical application, can be completely degraded, and has good abrasion resistance and lubricity so as to be capable of replacing the cartilage before the regeneration of the articular cartilage layer.

The invention discloses a curing agent for heavy metal contaminated soil restoration and a heavy metal contaminated soil restoration method. The curing agent for the heavy metal contaminated soil restoration comprises sulphoaluminate cement, and composition containing active silica and quick lime can be further added in the curing agent. After the sulphoaluminate cement is mixed with soil contaminated by heavy metal, firstly calcium sulphoaluminate in the sulphoaluminate cement is reacted with water to form monosulfate calcium hydroaluminosulfate, then heavy metal compound chemical bond is broken, heavy metal and atoms in ettringite are subjected to recombination of the chemical bond, metal atoms are constrained in a crystal lattice in space and not prone to be precipitated, thereby the purpose of curing heavy metal can be achieved, and the leaching toxicity of the heavy metal is reduced. A test proves that an obvious restorative effect can be achieved after the sulphoaluminate cement is used for 24 hours, namely after restoration, the soil leaching concentration is reduced and maintained within specified requirements, and the heavy metal can be effectively cured.

The invention relates to the technical field of contaminated soil treatment, in particular to a curing agent for restoring heavy metal contaminated soil. The curing agent comprises the following components in percentage by weight: 25 to 40 percent of cement, 40 to 65 percent of high-adsorbability clay mineral and 10 to 20 percent of quicklime. The curing agent has the advantages of no risk of secondary pollution when heavy metal ions are fixed by the high-adsorbability clay mineral and no obvious change of original soil property. The components of the high-adsorbability clay mineral are close to those of the original powdered clay, so great damage to a soil structure by the cement and the quicklime is avoided. Therefore, the curing agent also has the advantages of obvious effect of restoring heavy metal plane source contaminated agricultural land and good social, economic and environmental benefits.

The invention provides a formaldehyde scavenging agent and relates to a decoration deodorant. The formaldehyde scavenging agent consists of the following ingredients: 34 to 40 percent of plant extract liquid, 9 to 12 percent of sodium bicarbonate, 8 to 12 percent of hydrogen peroxide, 3 to 5 percent of penetrating agents and 35 to 40 percent of purified water. A preparation process of the formaldehyde scavenging agent comprises the steps that: the extract liquid, the sodium bicarbonate, the hydrogen peroxide, the penetrating agents and the purified water are put into a container to be uniformly stirred, and the formaldehyde scavenging agent is obtained. A plant and chemical combination method is adopted, formaldehyde can be fast decomposed in several minutes, high speed and long effect are realized, and the rebound and the secondary pollution are avoided. The formaldehyde scavenging agent has a good restoration effect on floor furniture scratches and can also be diluted to be sprayed onto objects or into the air for odor removal after decoration, and benzene series substances, carbon monoxide, sulfur dioxide, chlorylene, chlorine gas and microorganisms can be decomposed.

The invention provides a high temperature self-repairing conductive silver adhesive. The high temperature self-repairing conductive silver adhesive is prepared from the following raw constituents by parts: 100 parts of epoxy resin, 10-30 parts of curing agent, 10-40 parts of epoxy diluent, 240-990 parts of silver pieces, 3-20 parts of coupling agent and 5-20 parts of self-repairing microcapsule; wherein the self-repairing microcapsule is composed of the following raw constituents by parts: 100 parts of epoxy resin, 8-20 parts of latent curing agent, 30-60 parts of diluents, 0.5-2.5 parts of emulsifying agent, 500-800 parts of nano silver wires, 5-16 parts of coupling agent, 60-120 parts of capsule wall material, 0.5-2 parts of antifoaming agent and 150-900 parts of deionized water. The invention also provides a preparation method of the high temperature self-repairing conductive silver adhesive. The high temperature self-repairing conductive silver adhesive has the positive effects that the repairing efficiency is high, the repairing effect is expanded on the basis of the original conductive network, crack-conductive network double repairing is realized, and the long-term using effect of the conductive adhesive is guaranteed, the cost is saved, and the reliability and service life of the conductive adhesive in high temperature working environment are improved.

The invention provides a preparation method of a cement-based material having a deep self-repairing function. The preparation method disclosed by the invention comprises the following steps of: mixing concentrated solution of carbonic anhydrase generating bacteria with saccharomycete powder according to the mass ratio of (50-60) to 1, and immobilizing on a same carrier; mixing a substrate with a nutritional substance according to the mass ratio of (30-40) to 1, and fixing on another carrier; adding cement, sand and water by taking the carriers as lightweight aggregates, wherein the mass of the carriers is 17-23% of the total mass of mortar; uniformly stirring, and forming a test piece; and manufacturing a crack of the test piece after standard curing, and introducing air to maintain and repair under 25-30 DEG C constant-temperature water bath conditions. The repairing process of the test piece is monitored by utilizing a concrete nondestructive detection technology (ultrasonic sound); the repairing result is detected through a water permeability test; the result shows that the crack is completely repaired after repairing for 21 d; in addition, compared with other microbiological methods for repairing cracks of the cement-based material, the crack repairing speed and repairing depth are greatly improved.

The present invention discloses a chromium contamination in-situ remediation method, which comprises: 1) injection points are arranged and the dosage of a repair agent is determined, wherein it is ensured that the repair agent covers all the place to be repaired; 2) the repair agent is prepared; 3) a drilling system is provided with depth fixation equipment for positioning the injection points; and 4) the repair agent is subjected to high pressure injection. The in-situ remediation system suitable for the remediation method comprises the drilling system for supporting the operation and the agent mixing and injection system. According to the present invention, the large-scale infrastructure investment and building is not required, the stratum structure is not basically destroyed, the stratum condition does not affect the high pressure injection, the repair agent is uniformly distributed in the formed fracture cracks and provides advantages of targeting property, good repair effect, complete repair, and no bounce for the chromium contamination, the starting and the stopping can be performed at any time, the continuous large-scale construction can be achieved, and the engineering applications can be achieved.

The invention discloses a microorganism passivator for repairing heavy metal pollution of soil and preparation and application thereof. A preparing method comprises the steps of fermentation and adsorption of strains. Specifically, bacteria solutions obtained after fermentation of bacillus megateriumvar.phosphaticum and bacillus subtilis LVLE-14 are mixed in proportion, then adsorption is conducted by means of a special adsorption carrier, and then mixing and smashing are conducted to obtain the microorganism passivator. The adsorption carrier comprises hydrolysis residues and biochar which are mixed and smashed according to a certain mass ratio. By the adoption of the microorganism passivator for repairing heavy metal pollution of soil, the content of available heavy metals in soil can be effectively reduced, and the number of microbial populations and plant yield are increased greatly. The method for repairing heavy metal pollution of soil by means of the microorganism passivator is in-situ repair, operation is easy, the cost is low, and industrialized implementation can be easily achieved; furthermore, the repairing effect is good, soil fertility can not be damaged, and the utilization rate of resources can be increased.

The invention relates to a circulating well system for removing volatile organic compounds in underground water, and aims at providing a circulating well system suitable for different soil types to solve the problems of hydraulic transmission energy loss and poor soil permeability and avoid airflow short circuit caused by overlarge injection pressure as well as improve the influence radius and achieve remarkable repair effect. The system comprises an outer well, an inner well, a gas injection system, a gas extraction system and a reagent spraying system, wherein the inner well is arranged in the outer well, the gas injection system is used for introducing gas into the water of the inner well for aeration, a part of the gas mingled with organic pollutants is extracted by the gas extraction system and then adsorbed by an active carbon adsorption device to be discharged, the other part of the gas enters the outer well, and the reagent spraying system is used for sprays reagent liquid into the outer well.

The invention discloses a novel material S-CrPbCd for repairing heavy metal Cr-Pb-Cd contaminated soil as well as a preparation method and a using method of the novel material S-CrPbCd. The material comprises 5-15 percent of modified carbon nano tube, 10-60 percent of modified clay mineral and 20-60 percent of quicklime. The S-CrPbCd can efficiently adsorb Pb, Cd and Cr in the soil, and does not obviously change the soil property and cultivability. The S-CrPbCd enables the residue amount of Pb, Cd and Cr in sensitive crops to be reduced to 75-90 percent within 1-2 months, and meanwhile, the material has the characteristics of low cost, simple preparation process, no secondary pollution, quick action and easiness in large-area popularization.

The invention relates to a remediation technology for organic contaminated soil. According to the remediation technology for the organic contaminated soil, layered stepped type back excavation construction treatment is adopted, a remediation greenhouse has the height limit of 14m, the soil is divided into 3 layers, the soil with the depth of 0-4m is a first layer, the soil with the depth of 4-8m is a second layer, and the soil with the depth of 8-14m is a third layer, wherein the soil with the depth of 0-4m adopts an ex-situ chemical oxidation remediation technology and is transported to a region outside the greenhouse after being remedied, the soil of a region with the depth of 4-8m is excavated one by one every 10m along the remediation greenhouse from inside to outside in the vertical direction and is transported to other regions in the greenhouse for rapid ex-situ chemical oxidation remediation, and meanwhile, the excavation region with the depth of 8-14m is subjected to in-situ chemical oxidation remediation. The remediation technology for the organic contaminated soil has the advantages that the layered stepped type back excavation construction treatment is adopted, and therefore the technology cannot be limited by equipment and can be safer, and the treatment effect can be better.

Provided is a Kinect depth video spatio-temporal union restoration method. According to the Kinect depth video spatio-temporal union restoration method, on the basis of the hypothesis that neighborhood pixels with similar colors should have similar depth values, a color segment image which corresponds to color images is used for guiding depth filling carried out on motion areas extracted from a first depth image and motion areas extracted from all the follow-up depth images; in consideration that some areas with darker colors and without effective depth values can cause failure of the Kinect depth video spatio-temporal union restoration method, the areas with the darker colors are detected firstly, and effective depth values of the same areas with the darker colors are used for repairing empty areas; according to static areas in depth video shot by a Kinect, if a current depth image is provided with empty pixels, filling is carried out by using depth values of positions, corresponding to the positions of the empty pixels, of a previous depth image. Due to the fact that the drawing technology based on the depth images is used for drawing a virtual viewpoint, the image quality of a virtual right view which is correspondingly obtained through the Kinect depth video spatio-temporal union restoration method is obviously better than that of an original virtual right view, and the Kinect depth video spatio-temporal union restoration method can be applied to 3D drawing.

The invention provides a passivator for repairing mercury polluted soil. The passivator is prepared from a sulfur-containing reagent and an iron-containing reagent which are stored separately in a mass ratio of 1:5-5:1, wherein the sulfur-containing reagent is one or more of sulfur, sulfide, hydrosulfide, polysulfide and thiosulfate, and the iron-containing reagent is one or more of zero-valent iron, ferrous sulfate and hydrate thereof, ammonium ferrous sulfate and hydrate thereof, ferric sulfate, ferrous chloride and hydrate thereof, ferric chloride and hydrate thereof, polyferric chloride, poly ferrous sulfate, ferroferric oxide and ferric oxide. The sulfur-containing reagent and the iron-containing reagent in the passivator for repairing mercury polluted soil are stored separately, so that invalidation of effective ingredients of mercury in soil caused by reactions generated by mixing can be avoided. The passivator is wide in raw material source and low in cost. The repairing method is simple and feasible, is not sensitive to the soil type, has a remarkable repairing effect for various forms of mercury, does not have secondary pollution, and can be used for repairing cadmium, lead, zinc, copper or nickel heavy metal polluted soil.

The invention discloses a two-way powder spreading device of SLM equipment and a powder spreading method. The powder spreading device comprises a powder spreading device body, two parallel auxiliary linear motor guide rails and two parallel linear motor movable sliding blocks, wherein the linear motor movable sliding blocks are arranged on the auxiliary linear motor guide rails; the powder spreading device body is arranged on the linear motor movable sliding blocks in an erecting mode and comprises a powder carrying device and two powder supply gears arranged inside the powder carrying device; the circle center position of each powder supply gear is provided with a servo motor transmission shaft; the two powder supply gears are arranged at the equal altitude; the gear top circles of the two powder supply gears are tangent in the radial direction; flexible powder scraping brushes are arranged on the two sides of the powder carrying device. By means of the powder spreading device, the redundant steps in the powder spreading process are reduced, powder is spread in the back and forth direction, the evenness and flatness of the spread powder are ensured through the flexible powder scraping brushes on the two sides, and the good repairing function is achieved on the process instability.

The invention belongs to the technical field of tree protection and relates to a protective restoring method for damaged trees. The protective restoring method includes steps of A, cutting withered branches; B, splitting damaged parts of the branches; C, restoring damaged parts of trunk barks; D, supporting a tree; E, restoring tree posture; F, preventing and curing pests and diseases and watering and fertilizing. The protective restoring method for damaged trees is wide in application range from restoration of mechanical damages of trunks and branches to restoration of endogenous damages caused by pests and diseases, is simple to operate as application tools are common and operation processes of removal of impurities, sterilization and disinfection, coating of restoration agent and protective agent and the like are firstly performed after damaged parts are located, is scientific and reasonable in processes and remarkable in restoration effect. The protective restoring method has good application prospect in the technical field of tree protection.

The invention discloses a 3D printed digital artificial bone. The artificial bone consists of a cortical bone, a cancellous bone and a marrow cavity, wherein the cortical bone is composed of poly-L-lactic acid or polyester-ester-ketone; the cancellous bone is formed by mixing poly-L-lactic acid and hydroxyapatite; the molecular weight of the poly-L-lactic acid of which the cortical bone is composed higher than that of which the cancellous bone composed; the cortical bone and the cancellous bone are simultaneously prepared by a 3D printing technology. The invention also discloses a 3D printing method for the digital artificial bone. According to the artificial bone disclosed by the invention, in micrometer and millimeter scales, the porosity of the cortical bone is 10 percent; the porosity of the cancellous bone is 60-80 percent, and the pore size of the cancellous bone is 120-220 micrometers. The 3D printed digital artificial bone has the porosity, the pore size and the mechanical property as those of a bone structure of human beings.

The invention provides a background repairing method of a road scene video image sequence. The method comprises the steps that first, an optical flow diagram of a current frame to the adjacent frame is calculated, then based on Gaussian process regression, splashes in a lost optical flow diagram area are calculated, and the splashes are used for initialization of optical flow prediction; after the initialization of the optical flow prediction, then three layers of BP neural networks are used for achieving row-by-row optical flow prediction; then image repairing is conducted, in the image repairing stage, the optical flow initialization and optical flow prediction are used for enabling the pixels in a current frame lost area to correspond to an adjacent frame background area, and a Gaussian mixture model is used for achieving image repairing. According to the video image sequence under a movement background condition, corresponding of the current frame lost foreground area pixels to the adjacent frame background pixels is achieved based on optical flow information, image repairing of the movement foreground lost areas in the road scene video image sequence is effectively achieved, and the method is simple and effective.

The invention provides a passivating agent used for arsenic polluted soil restoration. The passivating agent comprises calcium oxide, an iron-containing reagent and calcium sulfate / calcium sulfate hydrate which are separately stored, and also comprises general purpose portland cement, calcium oxide accounts for 0.5-5% of the mass of arsenic polluted soil to be restored, the iron-containing reagent accounts for 0.5-5% of the mass of the arsenic polluted soil to be restored, the calcium sulfate / calcium sulfate hydrate accounts for 0.5-5% of the mass of the arsenic polluted soil to be restored, and the general purpose portland cement accounts for 1-10% of the mass of the arsenic polluted soil to be restored. Reagent raw materials adopted by the passivating agent used for arsenic polluted soil restoration have wide sources and low cost, the calcium sulfate / calcium sulfate hydrate and the iron-containing reagent have synergism, and addition of the calcium sulfate / calcium sulfate hydrate substantially reduces the use amount of the iron-containing reagent and reduces the engineering enforcing cost. An arsenic polluted soil restoration method provided by the invention is simple, is easy to implement, is insensitive to the type of soil, can be used for most of arsenic polluted soils, and has the advantages of wide application range, high arsenic polluted soil restoration efficiency, obvious restoration effect and no secondary pollution.

The invention discloses a method for repairing heavy metal contaminated soil. The method comprises the steps of breaking a heavy metal contaminated paddy field, irrigating the paddy field until a water logging layer on a soil layer is 10-15cm deep after breaking the 0.5-0.6m deep soil on the surface layer into soil lumps with sizes less than 2-3mm, adding a modified clay mineral adsorbent, mechanically stirring the adsorbent, standing for 6-8 hours, fishing out the adsorbent which floats on water and completes adsorption, and simultaneously discharging the supernatant, thus completing first-level repair; then collecting adsorbed light ceramsites, eluting the ceramsites in a wastewater treatment plant, and then repeating the previous steps until the soil reaches the standard. The method is simple to operate, is low in cost, has high removal efficiency, meets actual requirements and has good popularization and application values.

The invention discloses a mixed bacterial agent capable of degrading antibiotics in soil, belonging to the field of microbial technology. The mixed bacterial agent is prepared by mixing Bacillus subtilis J5P2 and Pseudomonas J2 according to a volume ratio of (0.1-3): 1. A preparation method for the mixed bacterial agent comprises the following steps: I, preparation of a suspension; II, colony culture: (1) preparation of a medium and (2) culture; III, separation of strains; IV, subculture and domestication: (1) domestication, (2) preparation of a LB medium, and (3) preservation; V, preparation of inoculum liquid; and VI, preparation of the mixed bacterial agent. The mixed bacterial agent provided by the invention has the characteristics of capacity of effectively degrading a plurality of residual antibiotics in soil and reducing environmental pollution, etc., and can be used for the remediation of land contaminated by antibiotics such as tetracycline, penicillin, sulfadiazines and quinolones.

The invention relates to a method for reconstructing a large-scale complex flyover 3D model by using airborne LiDAR data. The method includes the following steps: using inverse iteration mathematic morphological filtering and area information to extract flyover point cloud from airborne LiDAR data; in accordance with bridge floor connectivity, segmenting the flyover cloud point; adopting a central line vertical line scanning method to segment and extract a communicated bridge surface which has no bifurcation or intersection structures and has a width consistent width, acquiring a "constitutional unit"; an end place of the constitutional unit central line serving as a circular buffer area, detecting a shielding structure of the flyover through determination of point cloud height information within the buffer area; through steps of constitutional unit matching, 2D central line fitting and 3D curved surface fitting, acquiring a complete bridge surface 3D central line; and reconstructing a flyover 3D model in combination with bridge surface width information. Practice has proved that the method of the invention can effectively reconstruct the large-scale complex flyover 3D model, addresses shielding problem of the flyover point cloud, and the reconstructed 3D model has a higher correctness and completeness.

The invention relates to an apparatus for eluting and restoring contaminated soil of a site with integration of stirring, ultrasounds and microwaves. The apparatus is characterized in that: the apparatus comprises a housing and a support; the housing comprises a stirring shaft, an impeller, an elution pot, an ultrasonic generator and microwave generators; and a driving motor and a feed inlet which are connected with the stirring shaft are arranged on an upper part of the housing, and a discharge hatch and a control valve are arranged on a lower part of the housing. The contaminated soil and an eluant are sent to the elution pot through the feed inlet, and the mechanical stirring shaft and the ultrasonic generator or the mechanical stirring shaft, the ultrasonic generator and the microwave generator are respectively started according to characteristics of the contaminated soil to carry out an intensive elution for 30 to 60 min, so the contaminated soil of the site can be restored. The apparatus has the advantages of simple structure and low cost, allows the processing period to be shortened, the elution efficiency to be improved, and the restriction of factors of pollutant sorts, soli types, aging times and the like to be less through simultaneously starting to utilize stirring, ultrasounds and microwaves, and has an important application value to solve a Chinese problem of treating contaminated soil of the site to be urgently restored and exploited.

The invention relates to an environment-friendly steel protecting and repairing coating for concrete structures and a method for preparing the coating. The coating is compounded by components including, by mass, from 0.5 to 10% of organic corrosion inhibitor, from 5 to 35% of thermoplastic or thermosetting resin for realizing toughness and a waterproof sealing performance for a cement base material, from 15 to 50% of cement, from 0 to 4% of surfactant, from 0 to 5% of superfine fibers and the balance water component. The environment-friendly steel protecting and repairing coating in the technical scheme is particularly suitable for protecting the surface of steel exposed outside for a long time and coating to protect the surface of reinforcing steel for a high-durability concrete structure in a harsh environment, can permeate into a concrete base with extremely fine capillary channels and a complicated geometric structure, and accordingly is also applicable to durability repair for damaged concrete structures.

The invention belongs to the technical field of pollution treatments, and discloses a method for restoring soil with carex nubigena. An earthing depth of the soil polluted by lead, zinc, copper, cadmium and arsenic is 0-1m, the surface soil is flattened, and a relative humidity of the soil reaches above 50 percent by watering; and a PH value of the soil is adjusted to 5.0-7.5 by adding acidic materials to the soil. The carex nubigena is transplanted, and a cluster distance of transplanting is 20-100cm; and / or seeds of the carex nubigena are sown, and a sowing density is 5-30g / m<2>; and the carex nubigena is reaped once every half a year, and / or the carex nubigena is reaped when the height is larger than 60cm, underground roots are remained after reaping so that the carex nubigena grows again, and the reaped plants are centralized and treated including being burned by a fuming furnace. According to the method, the overground part of the carex nubigena is reaped, and lead, zinc, copper, cadmium and arsenic in soil are removed, so as to achieve the purpose of restoring soil.

The invention discloses a method for restoring As-Cd-combined-polluted farmland soil through a hyperaccumulator biomass charcoal combined system. The method comprises the following steps that the farmland soil is monitored and sampled at first, the varieties and planting modes of hyperaccumulators are determined, and enrichment of As and Cd is achieved; then a composite modifier mainly composed ofa microbial agent and a chelating agent is applied to the polluted farmland soil, and passivation and chelating of As and Cd are achieved; and a biomass charcoal-based restoring agent is applied to the surface of the farmland soil, soil is turned over and mixed evenly, and still standing is conducted, so that a treatment cycle is completed. Through the composite modifier, the biomass charcoal-based restoring agent and the hyperaccumulators are used for modifying and restoring the As-Cd-combined-polluted farmland soil, As-Cd heavy metal pollution of soil can be reduced and alleviated, the soilactivation and nutrients are improved, the soil structure is improved, plant growth is promoted, plant diseases and insect pests are suppressed, preparation is convenient, and the method is safe, reliable and suitable for large-area popularization.

The invention provides a nutrient restoration agent of organic activity desertification soil. The nutrient restoration agent of the organic activity desertification soil is a solid module restoration agent or a liquid coating restoration agent. The invention further provides a preparation method of the nutrient restoration agent of the organic activity desertification soil. The nutrient restoration agent of the organic activity desertification soil has the advantages of being good in the effect of soil layer fixation, good in water retention, and capable of being different in raw material ratios according to different regions, desertification degrees and afforestation kinds so that a best restoration effect is achieved.