1534 results about "Contaminated soils" patented technology

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 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 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 relates to the technical field of environmental restoration, in particular to a slow-release material for synergistically restoring heavy metal and organic compound contaminated soil based on modified biochar and microorganisms and an application method thereof.The slow-release material is prepared from, by weight, 50-80 parts of modified biochar, 30-40 parts of sodium alginate, 10-20 parts of gelatin, 5-10 parts of glycerin and 3-5 parts of calcium carbonate. The multi-modified biochar is prepared from, by weight, 300-400 parts of a functional flora mixed solution and 5-10 parts of mixed nutrient elements of glucose, yeast extract and KHPO, and through the synergistic effect of the multi-modified biochar and the functional flora, efficient immobilization (the immobilization rate gt is 60%) of heavy metal (lead, cadmium and chromium) and efficient degradation (the degradation rate gt is 70%) of organic pollutants (polycyclic aromatic hydrocarbon and petroleum hydrocarbon) are achieved.

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 belongs to the technical field of biology, and particularly relates to plant growth promoting performance of two alkali-producing strains, namely, Plutalophilous rhizobium and Pseudomonas moorsei, and application of the two alkali-producing strains to cadmium fixation and fertility increase of soil. The invention provides a multifunctional alcaligenes, which is any one of the following strains: Pentazobacterium mionense WW22, the preservation number of which is CGMCC (China General Microbiological Culture Collection Center) No. 27718, and the preservation number of which is CGMCC No. 27718. The invention discloses pseudomonas mohnii WW2, and the preservation number of the pseudomonas mohnii WW2 is CGMCC (China General Microbiological Culture Collection Center) No.27716. The invention also provides application of the strain for fixing cadmium and increasing fertility. The strain disclosed by the invention can promote the reduction of the effectiveness of cadmium in soil and increase the nutrient content in the soil, provides a technical basis for ensuring the safe production and utilization of crops in a cadmium-polluted farmland, and has a wide application prospect.

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.

A system for on-site treatment of impacted soil may include a soil-treatment device, a sensing device, and a computing device. The soil-treatment device includes an inlet for receiving impacted soil from a contaminated site and a reactor configured to treat the impacted soil according to one or more operational parameters. The sensing device is configured to receive a sample from the impacted soil and perform, on-site during the treatment process, a measurement of the sample. The computing device includes a memory storing executable instructions and one or more processors. When executed, the instructions cause the processors to receive the measurement from the sensing device, apply a model to determine, during the treatment process and based on the measurement, a value of one of the operational parameters in the set, and output the determined value for the soil-treatment device to perform the treatment operation according to the operational parameters.

The invention relates to the technical field of environmental pollution remediation, in particular to a refuse landfill coupling contaminated soil remote remediation system and method. The method comprises the following steps: carrying out deep stratified sampling and soil sample characteristic classification on a remotely repaired polluted soil heap to obtain remotely repaired soil samples corresponding to different pollution types; purified biogas is obtained to serve as a heat source for organic pollution desorption and conversion and solidification and stabilization coupling remediation, and a soil sample containing heavy metal after solidification and stabilization remediation is generated; carrying out chemical environmental assessment analysis and cyclic remediation treatment on the soil sample containing the heavy metals after solidification and stabilization remediation to generate a soil sample after organic pollution and heavy metal remediation; and carrying out fly ash landfill and reutilization on the soil sample subjected to organic pollution and heavy metal remediation to generate the remedied remote fly ash landfill and reutilization soil. Refuse landfill resources and remote polluted soil remediation can be combined to realize corresponding soil recycling.

According to the microbial flora culture method for efficiently degrading the organic pollutants, three continuous culture stages of enrichment, domestication and optimization are adopted, parameters such as the temperature, the pH value, the rotating speed and the ventilatory capacity are accurately controlled in each stage, and growth of microorganisms with degradation capacity is promoted. Through multi-stage culture and domestication, the obtained flora has efficient degradation capability on organic pollutants such as petroleum hydrocarbons, pesticides and polycyclic aromatic hydrocarbons, and has strong adaptability to pollutants with different concentrations. The 16S rRNA gene is used for sequencing and identifying the flora, and composition and dominant strains are clear. The flora is prepared into a microbial inoculum, and the microbial inoculum is preserved by freeze drying or liquid nitrogen, so that the activity can be effectively maintained. The flora can be widely applied to the fields of polluted soil and water body remediation, industrial wastewater treatment and the like, is green and environment-friendly, is relatively low in cost, avoids secondary pollution, conforms to the concept of sustainable development, and has relatively high economic and environmental values.

The invention relates to the technical field of contaminated soil and construction waste treatment, in particular to a contaminated soil and construction waste mixing and conveying device which comprises a conveying mechanism, a driving unit, a cleaning unit and a scattering part. In the process of conveying a mixture, the mixture is heated and dried through external heating equipment, the inner surface of the screening roller is scraped and cleaned in real time through a scraping plate, contaminated soil is prevented from blocking the screening roller, meanwhile, the contaminated soil is scattered through a scattering part, the retention time of the contaminated soil in the area on the left side of the variable-pitch spiral plate is prolonged, and the screening efficiency is improved. The drying effect of the polluted soil is improved, and the screening and discharging efficiency and effect of the polluted soil are improved; by means of the characteristics that the pitch of the left side of the variable-pitch spiral plate is small and the pitch of the right side of the variable-pitch spiral plate is large, a mixture in the conveying process is gathered in a spiral pitch area with the small pitch of the left side of the variable-pitch spiral plate, and then it is ensured that the mixture is fully dried and scattered by family members in the area.

A method for synchronously remediating organically contaminated soil and groundwater by means of electrokinetic coupled multiphase extraction. Cathode wells and anode wells are distributed in a staggered manner in an area to be remediated; a pipe filled with an electrolyte is inserted into each of the cathode wells and the anode wells; an extraction pipe is inserted into each cathode well; electrodes are connected to an electrokinetic remediation system; the extraction pipes are connected to a multiphase extraction system; by means of electrokinetic remediation, persulfate anions in a catholyte are injected into a stratum from the cathode wells and are then migrated to an anode by means of the action of electromigration, iron ions released by a sacrificial anode in an anolyte are migrated to a cathode by means of the action of electromigration and electrodialysis, and persulfate in soil and groundwater are activated during "opposite-direction" migration; then, the direction of an electric field is switched, and at the same time, electrolytes are added to corresponding electrode wells for "opposite-direction" migration, and remediation treatment is performed according to the above electrode-based remediation method and an electrode-based remediation method in which an electrode direction is switched, until organically contaminated soil and groundwater in the area to be treated are completely remediated at the same time; and the multiphase extraction system is started after the electrode-based remediation, and the electrolytes in the electrode wells are depleted. Further disclosed is the use of the method for synchronously remediating organically contaminated soil and groundwater by means of electrokinetic coupled multiphase extraction in in-situ remediation of organically contaminated soil.

The invention solves the problem that deep soil is not easy to contact with remediation liquid during contaminated soil remediation irrigation, and relates to the technical field of soil remediation irrigation, in particular to an irrigation device for heavy metal contaminated soil remediation, which comprises a liquid guide assembly and a soil shoveling assembly mounted on a cart, a soil turning mechanism in transmission connection with the soil shoveling assembly is arranged on the front side of the cart, a spray head set located below the rear side of the soil shoveling assembly is installed on the cart, the output end of the liquid guiding assembly communicates with the spray head set and the soil turning mechanism, the soil turning mechanism comprises a hollow cylinder, and a plurality of water guiding grooves are formed in the bottom of the hollow cylinder. The two ends of the hollow cylinder are connected with a solid column and a guide-in pipe respectively, sealing sleeves are installed on the outer surface of the solid column and the outer surface of the guide-in pipe, butt joint rings are arranged on the outer surfaces of the two sealing sleeves in a sleeving mode, and a straight cylinder ring arranged on the outer side of the hollow cylinder in a sleeving mode is connected between the two butt joint rings. The surface of the polluted soil can be broken open, a repairing agent is sprayed to the deep layer of the polluted soil, and the repairing effect on the deep layer of the soil is ensured.

The invention relates to a rapid production method of bamboo reed seedlings based on an aerial fog cutting rooting induction system, belongs to the technical field of energy plant seedling culture, and solves the technical problems that the production quantity of the bamboo reed seedlings cannot meet the requirement and the quality of the seedlings is uneven, the rapid production method comprises the following steps: S1, selecting high-quality bamboo reed stalks, and cutting after cutting; s2, preparing a rooting solution and a bamboo reed enzyme nutrient solution; s3, atomizing and spraying a rooting solution, and inducing the stem sections to root; s4, spraying an arundo donax enzyme nutrient solution, and inducing the stem sections to germinate; s5, root growth monitoring of the seedlings. According to the method, the seedling raising period is effectively shortened, the seedling quality is improved, the rooting period is about 15 days, the cultivated bamboo reed seedlings are similar in individual size, and the method is an industrial seedling raising method for the bamboo reed suitable for saline-alkali soil improvement, marginal land utilization and heavy metal contaminated soil remediation and treatment.

The invention discloses a serratia marcescens strain and an application thereof. Belongs to the technical field of agricultural microorganism and heavy metal pollution control. The serratia marcescens separated from the rhizosphere of the rice is inoculated to the rhizosphere of the rice, is used for in-situ remediation of polluted soil rice planting, can be effectively colonized at the root of the rice, and has high safety. Manganese and iron ions in the soil can be adsorbed and chelated, and the formation of an iron-manganese adhesive film on the surface of a rice root is enhanced, so that the Cd element is prevented and controlled from entering plant roots and overground parts; the absorption of manganese and iron in the polluted soil can be increased, the growth of the rice is promoted, and the yield of the rice is increased. And the standard-reaching safe production of rice Cd in the moderately and mildly polluted soil is realized, and the method has a very good application prospect.

The invention discloses a method for reducing cadmium accumulation of rice and improving salt tolerance. According to the invention, the CDS sequence expression of the OsRBOHA is driven by the OsNAC4 promoter, so that the avoidance capability of the rice to non-uniform stress is remarkably improved, and the stress exposure of a root system is reduced. A soil culture experiment shows that the pOsNAC4: OsRBOHA strain reduces cadmium accumulation of overground parts and grains in non-uniform cadmium polluted soil, and enhances salt tolerance of the overground parts in non-uniform salt stress soil.

The invention relates to the technical field of soil leaching equipment, and discloses a leaching device and method for contaminated soil remediation, the leaching device comprises a base, and a leaching box is fixedly mounted at the top of the base. During use, polluted soil to be remediated falls above the filter plate after being put into the leaching box, the rotating ring can be driven to rotate under the action of the rotating mechanism, then the filter plate is driven to synchronously rotate under the action of the vibrating mechanism, and continuous reciprocating vibration is performed in the rotating process, so that the soil quickly penetrates through the filter plate, and the soil can be recovered under the action of the driving mechanism. The crushing mechanism crushes, rakes and scatters large soil, the filtering speed is further increased, the filtered soil is guided to the center position through the falling material concentration mechanism and then falls onto the spraying buffer mechanism, at the moment, a plurality of atomizing nozzles spray out leacheate to leach the soil, and through the action of the spraying buffer mechanism, the falling speed of the soil can be delayed, so that the soil quality is improved. The spraying contact area is increased, so that the leacheate is in full contact with the soil to complete leaching.

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 discloses a method for promoting phytoremediation of heavy metal contaminated soil by combining modified charcoal with microorganisms, and relates to the technical field of heavy metal contaminated soil remediation. The repairing agent is prepared and comprises an inner layer, a middle layer and an outer layer, envelopes are arranged among the layers, the outer layer is further coated with an outer envelope, the inner layer comprises modified biochar and a first microbial agent, the middle layer comprises modified biochar and a second microbial agent, and the outer layer comprises dolomite powder and oyster shell powder. According to the invention, the remediation agent is combined with the heavy metal enrichment plants to carry out synergistic remediation on the contaminated soil, so that the enrichment plants can grow well under the high-acid high-concentration heavy metal environment condition, the problem of low biomass of the enrichment plants is solved, and finally, the efficient remediation of the contaminated soil is realized.

The invention discloses streptomyces griseorubens and an application of the streptomyces griseorubens in phthalate pollution remediation. The bacterial strain is Streptomyces griseorubens FZ202, the preservation number of the bacterial strain is GDMCC No: 61372, the bacterial strain has good environmental adaptability and efficient degradation capacity, DEHP can be effectively degraded within 100-800 mg / L, the highest degradation efficiency can reach 94.1%, and complete degradation can be achieved. The strain is inoculated into PAEs contaminated soil and interacts with rice, DEHP residues in the soil and crop bodies can be effectively reduced, various PAEs can be synergistically degraded, and the strain has the broad-spectrum degradation characteristic. Meanwhile, through multiple mechanisms of degrading pollutants, promoting plant growth, improving the soil environment and regulating and controlling microbial communities, the strain remarkably improves the growth performance of rice and the self-cleaning capacity of soil, and has a wide agricultural application prospect.

The invention discloses heavy metal resistant bacillus velezensis as well as a microbial remediation agent and application thereof. Bacillus velezensis DBS01 is screened from heavy metal contaminated soil in Dabaoshan mining areas in Shaoguan City, Guangdong province, is preserved in China Center for Type Culture Collection (CCTCC), has a preservation number of CCTCC M 20252228, not only has resistance to various heavy metals, but also can metabolize and secrete metabolites such as organic acid, cellulase and growth hormone in different growth stages, and can be used for preventing and treating various heavy metals. Multiple functions of curing heavy metals, dissolving phosphorus and potassium, promoting plant growth and the like are realized. According to the method, bacillus velezensis DBS01 is inoculated into a culture medium containing straw, calcium superphosphate, agar and sodium alginate are added, and a mixture containing the bacillus velezensis DBS01 is freeze-dried, so that the heavy metal contaminated soil in the mining area can be efficiently repaired in an environment-friendly manner at low cost, and the ecological function recovery of the soil is effectively promoted.

The invention discloses a sodium alginate embedded iron-carbon microcapsule material for repairing cadmium and arsenic polluted soil and a preparation method of the sodium alginate embedded iron-carbon microcapsule material, and belongs to the technical field of soil heavy metal pollution repairing materials. The material comprises straw biochar, high-iron steel slag powder, a sulfydryl acetylated chitosan-iron monatomic cluster compound, a boron-doped graphitized carbon coated cobalt ferrite nanosheet, sodium alginate, calcium chloride and sodium carbonate. Wherein the sulfydryl acetylated chitosan is prepared by reacting chitosan with sulfydryl acetic anhydride, dialyzing and drying, and performing solvothermal reaction with ferric nitrate under high pressure. The preparation method comprises the following steps: pyrolyzing and drying the straw biochar, reacting the high-iron steel slag with sulfuric acid, adding the biochar, adjusting the pH value, adding sodium carbonate, mixing to obtain an iron-carbon-based passivation material, mixing with two modified compounds, mixing with a sodium alginate solution, dropwise adding a calcium chloride solution, and stirring and curing. The material can be applied to remediation of cadmium and arsenic polluted soil.

The invention discloses a sludge, bagasse and calcium oxide co-pyrolysis biochar as a soil additive, and a preparation method and application thereof, and belongs to the technical field of environmental restoration. Sludge biochar synergistically modified by bagasse and calcium oxide is used as a soil additive, calcium oxide is introduced for catalytic co-pyrolysis through the synergistic effect of bagasse and calcium oxide, and sludge-bagasse-calcium oxide biochar is prepared; the optimization effect of the sludge-bagasse-calcium oxide biochar in heavy metal contaminated soil remediation is evaluated through heavy metal occurrence form analysis, ecological risk assessment and soil remediation effect experiments. According to the sludge-bagasse-calcium oxide biochar prepared by the method, the fixing capacity of the biochar on heavy metals and the fixing efficiency of the heavy metals in soil are improved, and the physicochemical properties and fertility characteristics of the heavy metal contaminated soil are improved; the characteristics of the sludge-bagasse-calcium oxide biochar for well fixing heavy metals and improving soil properties are exerted, the ecological risk is reduced, the physicochemical properties and fertility characteristics of the soil are improved, and the application of a heavy metal contaminated soil remediation process is optimized.

The invention relates to the technical field of heavy metal contaminated soil remediation, in particular to a plant-microorganism-passivator synergistic remediation method for a heavy metal contaminated farmland, which comprises the following steps: step 1, constructing a soil digital twinborn model; step 2, intelligent decision making and verification of a collaborative restoration scheme; 3, soil pretreatment before remediation; step 4, hierarchical collaborative restoration and dynamic regulation and control; 5, performing long-term verification on the repair effect and performing model iteration; physical heat treatment is used as strengthening pretreatment, the occurrence form of heavy metal is changed through high temperature, biomass charcoal is generated in situ, passivation immobilization-microbial strengthening-plant extraction three-stage collaborative operation is carried out according to the time sequence, pollutants are rapidly locked through a passivating agent, rhizosphere immobilization is strengthened through functional microorganisms, plant growth is promoted, and the quality of plants is improved. And the hyperaccumulator finally removes the heavy metals from the soil, so that the unification of short-term control and long-term reduction is realized.

The invention discloses a bacillus M3 and an application thereof. The bacillus M3 is separated from an extremely polluted environment by adopting a gradient pressure screening method, has relatively strong heavy metal tolerance, can remove uranium in soil, is used for in-situ remediation of uranium pollution of soil, has the characteristics of greenness, environmental protection and no drug residue, is high in biological safety, can greatly reduce the remediation cost, and reduces the damage of a soil structure.

The invention provides an ecological risk assessment method and system for heavy metal contaminated soil, and relates to the technical field of soil pollution treatment. The method comprises the following steps: acquiring a soil sample set of a target area; constructing a space grid model of the target area according to the soil sample set; determining a comprehensive pollution index of the grid unit according to the concentration distribution information of the heavy metal; performing time sequence analysis on the space grid model, and predicting the dynamic migration trend of the heavy metal concentration corresponding to the grid unit; determining exposure threshold values of different ecological receptors in the grid units, and generating an ecological risk thermodynamic diagram of the target area according to the comprehensive pollution index, the dynamic migration trend and the exposure threshold values; and determining a risk position and a safety position from the target area according to the ecological risk thermodynamic diagram and a preset threshold value. Therefore, according to the scheme, the ecological risk of the target area can be evaluated more comprehensively and accurately, and the accuracy and reliability of risk evaluation are greatly improved.

The invention provides a heavy metal contaminated soil remediation method and device based on directional regulation and control of an electrode array, and the method comprises the following steps: filling heavy metal contaminated soil to be remediated into a soil chamber, and arranging the electrode array in the soil chamber; an electrolyte is added into the cathode chamber and the anode chamber respectively, so that the electrolyte enters the soil chamber, and the moisture content of the soil is maintained to be 20-50%; and under the condition that the pH value of the electrolyte in the cathode chamber and the pH value of the electrolyte in the anode chamber are maintained at 6.0-7.5, bipolar pulse electric fields are applied to the anode and the cathode, so that heavy metal ions in the heavy metal contaminated soil to be remediated are directionally migrated to the surface of the electrode array, and remediation is completed. Moreover, the remediation method and device are simple and convenient to operate, efficient, controllable and environment-friendly remediation of the heavy metal contaminated soil is achieved, good engineering applicability and economical efficiency are achieved, and the green development requirement of the soil remediation technology is met.

The invention relates to the technical field of cementing materials, in particular to a green high-performance solid-waste-based cementing material as well as a preparation method and application thereof. The green high-performance solid waste-based cementing material is prepared from the following raw materials in parts by weight: 15 to 25 parts of cement clinker, 15 to 25 parts of desulfurized gypsum, 0 to 5 parts of quick lime, 50 to 60 parts of superfine slag powder, 0 to 18 parts of red mud, 0 to 10 parts of manganese slag, 0 to 10 parts of carbide slag, 0 to 15 parts of fly ash, 0 to 10 parts of alkaline residue and 0 to 2 parts of exciting agent. According to the preparation process of the material, effective utilization of solid waste is realized, efficient resource conversion of the solid waste is promoted, and carbon dioxide emission in the high-energy-consumption clinker production process is remarkably reduced; other industrial wastes can be solidified in the production process, heavy metal polluted soil and wastewater are treated, energy consumption and pollution emission are reduced, and sustainable development of the building industry is facilitated.

The present invention belongs to the technical field of biological treatment of environmental pollutants, and specifically relates to a strain of low-temperature-resistant multifunctional bacteria and its application in soil and water pollution remediation. The low-temperature-resistant multifunctional bacteria is the strain TLT1 of the genus Tularemia, which was deposited in the General Microbiology Center of the China Microorganism Culture Collection Administration on August 9, 2023, with the deposit number: CGMCC No: 40754. The bacterial agent of the present invention can be used to stabilize zinc in the soil environment, which helps to enrich the database of bacterial strains that stabilize heavy metals and have the ability to degrade quinolone antibiotics. The present invention prepares the purified strain into a bacterial suspension, which can effectively stabilize zinc in different environmental media such as water and soil under low-temperature conditions, and has the ability to degrade enrofloxacin in different environmental media such as water and soil. Compared with methods such as chemical oxidation, this method is more efficient, less expensive, and has no secondary pollution, providing an effective biological-non-biological combined remediation technology for the remediation of zinc-enrofloxacin complex-contaminated soil and water.

The utility model relates to a system suitable for purification treatment of organic contaminated soil, which comprises a thermal desorption unit, a primary purification unit, a secondary purification unit, a GWH heat exchanger and an adsorption unit which are connected in sequence, and further comprises a GGH heat exchanger, the thermal desorption unit is of an indirect heating structure and is internally provided with a soil channel and externally provided with a heating channel; the adsorption unit is connected with a recycled flue gas inlet in the heating channel through a purified flue gas pipeline, and a fan is arranged on the purified flue gas pipeline. According to the utility model, the organic polluted soil can be efficiently purified in an industrial plant, the operation is reliable, the investment and operation cost is low, the service life of equipment is long, and secondary pollution is avoided.