815 results about "Soil restoration" patented technology

The invention relates to a soil pollution thermal desorption restoration processing system, which belongs to a soil restoration processing system. The system comprises a feed system, a heat source system and a control system, and is characterized by further comprising a thermal desorption system and a tail gas processing device, wherein the thermal desorption system consists of a draught fan and a thermal extraction converter, and the tail gas processing device consists of a dust remover and an absorption tower. When the system is applied to processing polluted soil with main pollutants of volatile/semi-volatile organic compounds, compared with the like products in other countries, the equipment cost is only 1/3 to 1/5 of the same; the problem of secondary pollution probably brought about in the process of processing the polluted soil is thoroughly avoided; a temperature control system has better practicability; the running cost for each ton of the polluted soil is between 300 and 500 RMB, which is far low than the processing cost for hazardous landfilling and incineration of the polluted soil; and half of the purification effect of processing the polluted soil with the main pollutants of the volatile/semi-volatile organic compounds can reach between 70 and 80 percent.

The invention provides a farmland soil heavy metal pollution restoration method through coupling activating and passivating, belonging to the technical field of environmental technology. According to a technical scheme adopted by the invention, the farmland soil heavy metal pollution restoration method comprises the following steps: a step I, planting heavy metal hyper-accumulation plant, applying a heavy metal activator into the soil, collecting plant which is enriched with heavy metals; a step II, applying a heavy metal passivator into the soil, planting and harvesting crops with heavy metal content reaching the safety standard. By two different coupling technologies in the two government stages, on one hand, the concentration of heavy metals in the farmland soil is lowered with high efficiency, on the other hand, the farmland can be put into safety production as early as possible, so that the heavy metal pollution farmland soil restoration efficiency is improved generally, and the method can be applied to farmland soil with large-area heavy metal pollution.

The invention discloses an in-situ restoration method for heavy metal polluted soil, which comprises the following steps of: uniformly mixing submicron or nano iron, coal ash, a magnesium-containing preparation and bentonite in proportion by weight of (5-25): (40-50): (1-10): (15-50) to obtain a heavy metal polluted soil restoration agent, after applying the heavy metal polluted soil restoration agent on the surface of the heavy metal polluted soil at the thickness of 1-4cm, uniformly mixing a 20cm thick polluted soil surface layer with the applied restoration agent by plowing, and after 3-6 months, reducing heavy metals such as cadmium, chromium, mercury, lead, arsenic, nickel, zinc, copper, magnesium and vanadium in the heavy metal polluted soil into low-valence immobilized heavy metals to lose biological effectiveness and realize the in-situ restoration for the heavy metal polluted soil. However, the environmental quality of restored soil satisfies the requirements of second-level standard values in Environmental Quality Standards for Soils (GB 15618-1995) in China.

The invention discloses a preparation method of a functional organic fertilizer for soil restoration. The method comprises the following steps: mixing crushed straws with blue-green algae according to the mass ratio of (1-5):10 to obtain a mixture, and then adding a biomass-transformed complex microbial inoculant and a biomass-transformed inductive material to the mixture; evenly mixing and then carrying out conventional stacking fermentation for 5-15 days, so as to obtain a semi-solid organic fertilizer; and mixing and pelletizing the semi-solid organic fertilizer, clay, biomass carbon ash and a heavy metal ion chelating agent according to the ratio of 1000:(50-200):(50-150):(1-5), so as to obtain the functional organic fertilizer for soil restoration. The organic fertilizer disclosed by the invention has a persistent slow-release fertilizer effect, and can adsorb, chelate and immobilize the heavy metal ions in a deactivation manner, soil fleeciness is facilitated, the moisture retention and the breathability are improved, rooting of plants is facilitated, formation of beneficial components of soil microelements and the like is optimized, the heavy metal-polluted soil is effectively restored, and secondary pollution of the soil is not caused.

The invention relates to the field of environmental protection and restoration and in particular relates to an environmental-friendly heavy metal stabilizer used for soil restoration of an industrial pollution site and an application method thereof. The environmental-friendly heavy metal stabilizer is prepared from the following material components in parts by weight: 40-50 parts of clay mineral, 17-24 parts of adsorbing material, 10-18 parts of heavy metal chelating agent, 4-8 parts of heavy metal precipitating agent and 10-15 parts of alkaline modifier. Main ingredients of the adopted stabilizer are natural materials, heavy metal pollutant in soil can be rapidly and effectively stabilized through composite action such as chelating, precipitation and adsorption; the heavy metal pollutant is stabilized for a long time, toxicity and biological availability of the heavy metal pollutant can be reduced, risk of the heavy metal polluted soil to the environment and human health is reduced, and the heavy metal polluted soil is restored; besides, a soil texture improving ingredient is contained, so that soil is restored while tillability of the soil is improved.

The invention belongs to the technical field of heavy metal pollution soil restoration, and particularly relates to a soil heavy metal passivator, a preparation method thereof, and a passivation method thereof on soil cadmium. The soil heavy metal passivator provided by the invention is prepared from the following materials in parts by weight: 30 to 50 parts of modified alkali minerals, 10 to 15 parts of rotten agriculture and forestry wastes, 1 to 10 parts of soil conditioners, 1 to 5 parts of pH sensitive gel, 1 to 5 parts of phosphogypsum, and 0.1 to 5 parts of graphene. The soil heavy metal passivator provided by the invention has stronger adsorbing and chelating functions, can effectively fix heavy metal cadmium in the soil, and prevents effective cadmium from entering into crops; regulation can be carried out according to the soil pH, so that the utilization ratio and the long-term stability of the soil heavy metal passivator are improved; meanwhile, with an added soil conditioner, the soil environment can be improved, and the soil fertility is improved. The passivator provided by the invention can better meet the urgent demand of heavy metal pollution soil restoration in China currently on strong stability, no secondary pollution, and durable and stable effect.

The invention relates to a microbe soil repairing additive and process for preparation. The process for preparation comprises that liquid microbe fertilizer containing photosynthetic bacteria, bacillus, actinomycete and lactic acid bacteria are absorbed to one or a plurality of natural organic fertilizers as grass peat and zeolite powder or the like, to be mixed proportionally. The invention further relates to the application of the microbe soil repairing additive for repairing soil. The invention can lead useful microbe into soil, uses microbe technique to transfer, absorb, degrade, and convert the contaminant in soil, adjust soil pH value, eliminate soil blocking, and restrain soil-borne disease, thereby improving soil structure, to return soil to original ecologic structure. And the viable bacteria group of the invention is planted in plant root, to quickly grow and deeply insert plant root, thereby improving yield, quality and level of agricultural product, as one ideal fertilizer of organic agriculture, with wide application in agriculture continuous development.

The invention discloses an in situ integrated restoring system and a method of petroleum polluted soil, and belongs to the technical field of petroleum polluted soil restoration. The system provided by the invention is composed of a suction well, a vacuum pump, a steam-water separation system, an oil-water separation system, a dosage pot, an injector pump, an injection well and an automatic control system. With the combination of the merits of vacuum suction and biological restoration, free-phase and high-density gas-phase pollutants in soil can be sucked and pumped in the invention; and simultaneously a surfactant reinforced biological restoration method can be adopted to accelerate the degradation or transformation and distribution of petroleum pollutants adsorbed on soil, so as to raise the in situ soil restoration efficiency, shorten the technological process, reduce the restoration cost and widen the application range of the in situ restoration technology.

The invention discloses a vehicle-mounted integrated soil washing and restoring device which comprises a vehicle-mounted conveying system, a screening and breaking module, a stirring centrifugal machine module and an energy supply module. The screening and breaking module, the stirring centrifugal machine module and the energy supply module are all integrally installed in a carriage of a transport vehicle. All the soil washing and restoring devices including the vehicle-mounted conveying system, the screening and breaking module, the stirring centrifugal machine module and the energy supply module are integrated in the carriage of one transport vehicle, the function of the conveying system and the functions such as screening and breaking, chemical washing and energy supply in the soil restoring process are integrated to one platform, and the soil washing and restoring device which is highly integrated and is independent and complete is formed. The device can be driven to a site with the soil restoring requirement at any time according to requirements. Due to the fact that the device is provided with the high-power energy supply module, no extra energy is needed, and soil restoration treatment can be conducted in any place where the vehicle can reach.

The invention provides a multifunctional active organic fertilizer and a preparation method thereof, relating to an organic fertilizer containing bacteria, fungi and spores, particularly an active organic fertilizer with functions of soil restoration and disease/pest resistance. The invention aims to provide a multifunctional active organic fertilizer capable of restoring soil pollution and improving product quality and a preparation method thereof. The multifunctional active organic fertilizer is composed of three layers from inside to outside, wherein the innermost layer is composed of a component A of which the main effective components are Bacillus subtilis and Paecilomyces lilacinus; the middle layer is composed of a component B and a component C containing multiple rich nutritive elements; and the outermost layer is composed of a component D of which the main effective components are Streptomyces vinaceus-drappus and Gliocladium roseum. The multifunctional active organic fertilizer can passivate heavy metals in soil, activate the soil, improve the microecological environment of the rhizosphere, degrade the chemical pesticides and improve the crop quality. The multifunctional active organic fertilizer is used in the field of agricultural planting.

The invention provides a method for using plants to control and restore soil and to generate a biological fuel. The method comprises: planting fast-growing economic crops abundant in cellulose and lignin in polluted metal mine soil, wherein the crops are capable of absorbing and gathering heavy metals in the soil in the rapid growth process; after harvesting, moving away the economic crops, employing technologies such as thermochemistry, catalytic transformation and the like to transfer the economic crops into a biological ethanol fuel; at the same time extracting the heavy metals absorbed and gathered by the crops for separate treatment; and performing pyrolysis and charring on the residual solid residue to form biological charcoal for recycling in the mine soil and absorption of heavy metals and organic pollutants in the soil so as to gradually make the polluted soil restored and improved. The method of the invention helps to substantially reduce soil restoration cost, and reaches the purposes of cascade utilization, cyclic utilization and ecological environment protection.

The invention relates to a two-stage countercurrent washing medicament addition stabilization combined restoration method of chromium polluted soil, comprising the following steps of: (1) pouring polluted soil into fist-stage washing equipment, stirring and washing the soil with a liquid-to-solid ratio of 10:1 and then carrying out solid-liquid separation; filling separated waste water into a water treatment system, and pouring dewatered soil into second-stage washing equipment; (2) using clearing water which is treated by the water treatment system and reaches the standard as the water of the second-stage washing equipment, stirring and washing the dewatered soil with a liquid-to-solid ratio of 10:1 and then carrying out solid-liquid separation; sending separated washing liquid to the first-stage washing equipment for recycling; (3) adding FeSO4 to the soil after second-stage washing to carry out stabilization treatment, wherein the addition quantity of the FeSO4 is 1-5 percent of the soil to further reduce the content of Cr6 in the soil and reduce the pH to 6-9 meanwhile; and (4) directly backfilling the stabilized soil. The invention has the advantages of thorough elimination of hexavalent chromium pollution, low price and easy obtain of medicaments, environmental security, use function recovery of restored soil, and the like.

The invention relates to a soil restoration agent and specifically relates to a soil restoration agent made from feces of livestock and poultry as well as a preparation method and application thereof, wherein the soil restoration agent is prepared by the following steps: mixing biochar, the feces of livestock and poultry and the soil to obtain compost material; and carrying out compost treatment to the compost materials to obtain the soil restoration agent. The soil restoration agent disclosed by the invention is good in restoration effect, free of toxic and side effect, and capable of restoring various pollutions and composite pollution. The preparation method of preparing the soil restoration agent disclosed by the invention is simple in process and low in cost; and the soil restoration agent disclosed by the invention not only efficiently restores polluted soil, but also recycles biomass resources, especially feces of livestock and poultry.

The invention provides an ecological restoration method for soil in a chemical industrial area. The ecological restoration method includes the following steps that pollution indexes of the soil in the chemical industrial area are detected; deep ploughing is conducted, clay not smaller than 30 cm under the ground surface is turned up, and the soil is loosened and watered to be wet; a compound microorganism bacterium agent is thrown into the soil with the dosage ranging from 30 ppm/m<2> to 50 ppm/m<2>; terrestrial invertebrates are thrown into the soil; plants are planted on the soil; the pollution indexes of the soil in the chemical industrial area are detected; and the above steps are repeated every other 30 days to 60 days till the quality of the soil meets the requirements. By means of the ecological restoration method for the soil in the chemical industrial area, biological diversity of the soil is restored, the quality of the soil is improved fundamentally, the self-purification capability of the soil is restored fundamentally, and the pollution phenomenon is effectively eliminated. The method is used for strengthening the self-restoring capability and the self-cleaning capability of the nature, and meanwhile the ecological restoration method has the beneficial effects that the running cost is low, and the pollution treatment effect is good.

The invention discloses a production process of an organic polluted soil restoration agent. The production process includes the following steps of firstly, raw material matching, secondly, raw material treatment, thirdly, accumulation for fermentation, fourthly, pelletizing and fifthly, packaging and storage. The organic polluted soil restoration agent is good in soil restoration effect, especially quite effective in degradation of organic pesticide in soil and meanwhile capable of reducing the content of heavy metal such as lead and cadmium in soil, effectively improving the comprehensive capacity of soil and guaranteeing food safety.

The invention provides an in-situ electric heating desorption restoration technology and device for a contaminated site, belongs to the technical field of soil restoration, and solves the problems that soil and underground water are polluted due to industrial pollution and agricultural chemistry, and the like. The in-situ electric heating desorption restoration technology for the contaminated site comprises the steps of a, inserting a plurality of heating wells and extraction wells into the contaminated site; b, paving a thermal insulating layer on the surface of the contaminated site; c, carrying out precipitation treatment on the underground water of the contaminated site; d, heating the contaminated site through heating pipes in the heating wells, and extracting gaseous pollutants generated by the heated contaminated site and polluted underground water through vacuum pumps in the extraction wells, so as to restore the contaminated site; and e, feeding the gaseous pollutants and the polluted underground water extracted in the step d into a border thermal cycle pipe buried in a stratum at the border for secondary heat exchange, and then feeding the gaseous pollutants and the polluted underground water subjected to secondary heat exchange into a ground extraction treatment device for treatment. The in-situ electric heating desorption restoration technology has the advantages that full automatic temperature control is achieved, waste heat is fully reused, the layout is flexible, a higher scientific and technological level is reached, and the like.

The invention relates to a solar hot air system enhanced in-situ bio-ventilation soil restoration system. The system comprises a solar air heat collection system, a ventilation system, a contaminant vacuum extraction system and a gas purification system. The ventilation system is a ventilation pipeline, and the solar air heat collection system is connected with the ventilation pipeline and used for heating air in the ventilation pipeline. The contaminant vacuum extraction system comprises a gas phase extraction pipe and a vacuum pump, the gas phase extraction pipe is directly buried in the heated contaminated soil area, and the upper portion of the gas phase extraction pipe is connected with the gas purification device. The solar hot air system enhanced in-situ bio-ventilation soil restoration system further comprises a nutrient solution injection system, and a nutrient solution is evenly pumped into organic matter contaminated soil through the nutrient solution injection system. According to the system, solar energy serves as a heat source, heated air is injected into a soil embedded radiating pipe, soil temperature is adjusted, soil microbial flora and the nutrition environment are optimized, degradation of microorganisms for organic matter in the contaminated soil is promoted, and then following vacuum extraction is facilitated. By means of the system, energy is saved, the emission of greenhouse gas is reduced, and secondary pollution generated by combustion of fossil fuel is avoided.

The invention relates to a plant restoration technology for heavy metal-contaminated soil, specifically to a method for repairing heavy metal-contaminated soil by using oilseed rape-oil sunflower crop rotation technology. The method overcomes the problems of seasonal restriction, slow growth, low biomass of an overground part, low total absorption and accumulation amount of heavy metals, tolerance and enrichment capability to only one single heavy metal, bad economic benefits and poor comprehensive effects in practical application of plants used in conventional heavy metal-contaminated soil restoration technology. According to the method provided by the invention, oilseed rape and oil sunflower are planted in soil contaminated by compound heavy metals according to the natural growing periods of the oilseed rape and the oil sunflower, and conventional cultivation is carried out; the oilseed rape and the oil sunflower both grow normally in the contaminated soil, no obvious symptom of toxicity appears, and the outputs of the oilseed rape and the oil sunflower are not affected; and since the biomass of the overground parts of the oilseed rape and the oil sunflower is great, a great amount of various heavy metals can be absorbed and accumulated, and in particular, the contents of Cu, Zn, Cd and Hg in the plants of the oilseed rape and the oil sunflower are obviously higher than soil background values, reaching an enrichment level.

The invention discloses an eco-friendly soil-restoration processing device for greening of a municipal garden. The device comprises an outer box body. The bottom of the outer box body is equipped witha driving mechanism. One side of the outer box body is equipped with a support rack. One side of the support rack is provided with a soil shoveling board. The interior of the support rack is equippedwith a transport mechanism. The upper end of the outer box body is provided with a pressuring pump and a stirring motor. The end part of the pressuring pump is equipped with a pressuring pipe. The bottom in the outer box body is provided with a material scattering mechanism and a drum. The interior of the drum is equipped with a stirring shaft. The interior of the drum is provided with a filter net. A material poking scraping plate and stirring blades are installed on the stirring shaft. The eco-friendly soil-restoration processing device for greening of the municipal garden has the followingbeneficial effects: through the driving mechanism, automatic movement of the device is achieved; automatic collection of soil is realized through the soil shoveling board and the transport mechanism;the device is used for orderly filtering, spraying medicine and stirring; the device has a compact structure and suitable for construction of the municipal garden; and the material scattering mechanism is used for scattering processed soil on the ground so that soil is kept smooth and flat and convenient for subsequent application.

The invention discloses a stabilization restoration method for soil compositely polluted by arsenic, antimony and other heavy metals. The method comprises the following steps that (1) bentonite and/or crop-residue-derived carbon are/is added into the heavy-metal-compositely-polluted soil and stirred evenly; (2) water is added into the soil, the moisture content of the soil is made to be 20%, and a stirring reaction is conducted for 0.5-2 h; (3) a certain amount of arsenic-antimony-polluted soil stabilizer is added and stirred evenly, water is added then, the moisture content of the soil is made to be 30%-50%, and even stirring is conducted; and (4) the soil where the stabilizer is added is cured for 3-30 d, and the purpose of soil restoration is achieved. A stabilizing material adopted by the method has the characteristics of being economical, effective, extensive in source, low in cost, high in stability, free of secondary pollution to soil, neutral, no change in polluted soil pH value and the like, the operation method is simple, high in practicability and wide in application range, and the method has the good stabilization restoration effect on the heavy-metal-compositely-polluted soil, especially on the soil compositely polluted by heavy metals of arsenic and antimony.

The invention relates to an in-situ chemical oxidation restoration construction method for organic contaminated soil and belongs to the field of soil restoration. The construction method comprises the steps of 1, leveling; 2, positioning; 3, drilling; 4, oxidizing agent preparation; 5, oxidizing agent injection; 6, activating agent preparation; 7, activating agent injection; and 8, maintenance. Through in-situ agent injection restoration of contaminated soil, soil structure damage caused by soil excavation is avoided, and restoration cost is reduced. Through activating agent injection, the oxidizability of an oxidizing agent can be improved, and restoration efficiency can be improved. The influence radius of agents is increased by means of the high-pressure jet grouting technique, and low-permeability contaminated soil can also be well restored. A restored site can still be used for secondary development and utilization, recycling application of land is achieved, and great economical benefits and social benefits are realized. The construction method is wide in application range, reliable in restoration effect, economical and feasible, can be used for restoring contaminated sites which can not be excavated, and can also be applied to contaminated sites with poor soil permeability.

The invention discloses a method for improving soil organic matter through fungus cultivation. The method includes the steps of selecting species of fungi, preparing a base material, preparing compost, preparing a cultivation species suitable for field production, conducting field production and post-production treatment and the like. The compost is laid in a field and applies high-strength organic fertilizer to the field; after the compost is decomposed through mycelia, macromolecular substances are degraded into small molecular substances capable of being easily absorbed by crops, and therefore soil fertility is improved; fungus chaff left after production is rich in nutrient an is superior organic fertilizer; in the fungus field production process, fungi are irrigated, soil humidity can be kept, and the improvement of soil microbial flora and soil ecology is greatly helped. Compared with the prior art, the method has the advantages that load cultivation type fungus production is developed through an existing cultivated land, economic benefits can be achieved, the soil organic matter content can be improved, soil ecology is improved, soil fertility is increased, and soil restoration and crop fertilization can be achieved by developing the land cultivation type fungus production.

The invention discloses a soil remediation agent for heavy metal fixing. Plant ash, livestock manure, corn straw, rapeseed residues, Jerusalem artichoke extract, glycine, chitosan and a fermented microbial agent are used as main components, and sodium hexametaphosphate, montmorillonite, bentonite, weathered coal, charcoal, polylactic acid fiber, manganese nitrate, copper sulfate, magnesium chloride, calcium hydroxide, a stabilizer and an antioxidant are added to prepare the soil remediation agent for heavy metal fixing by being assisted by spray drying, pressurized calcination, high-temperature mixing, ultrasonic smashing, quick mixing, dark fermentation and other processes. The soil remediation agent for heavy metal fixing is reliable in soil restoration performance, can effectively reduce the heavy metal content in soil and is pollution-free to the environment.

The invention discloses a soil restoration system and a soil restoration method thereof. The soil restoration system comprises a thermal desorption furnace, a combustion device and a waste heat boiler. The thermal desorption furnace comprises a furnace body, a material distributing plate and a first radiant pipe combustor. A thermal desorption region is arranged in the furnace body. The first radiant pipe combustor is arranged on the side wall of the furnace wall so as to provide thermal desorption heat for soil in the thermal desorption region. The position, corresponding to the thermal desorption region, of the furnace body is provided with a volatile gas outlet. The combustion device is provided with a combustion chamber used for combusting gas. The combustion chamber is provided with a fuel gas inlet, a first flue gas inlet and a first flue gas outlet. The fist flue gas inlet communicates with the volatile gas outlet. The waste heat boiler is provided with a second flue gas inlet and a second flue gas outlet. The second flue gas outlet communicates with the first flue gas outlet. According to the soil restoration system, heat in high-temperature oil gas generated in the thermal desorption furnace can be repeatedly used, and loss of lots of heat and energy waste are avoided.

The invention discloses a method for enriching heavy metals and organic matters in soil. The method is characterized in that an electric field is formed in soil through setting up an electric enriching system, the heavy metals and organic matters in soil are enriched in an area through the electroosmotic flow and the electromigration effects, and separation and purification are carried out; the electric enriching system is composed of an adjustable direct current supply, an anode chamber, a cathode chamber, soil, electrodes and a cation exchange membrane; and the anode chamber and an anode are positioned at two sides of the electric enriching system, the cathode chamber and a cathode are positioned at two sides of the electric enriching system, soil is positioned between the two electrodes, the cation exchange membrane is arranged between the cathode chamber and the soil, and the adjustable direct current supply is connected with the anode and the cathode. The method has the advantages of short plant enriching time, no influences by natural factors, and no specificity to the enrichment of the heavy metals to realize waste resource utilization and soil restoration.