79results about How to "Does not destroy physical and chemical properties" patented technology

A method for treating the As-polluted soil features that the Chinese brake herbs are planted in said soil for absorbing the As from the soil and the their leaves are removed periodically (5-6 months). For acid soil, the lime or alkaline fertilizer can be applied to increase its pH value.

The invention provides a phytoremediation method for managing composite cadmium-lead-arsenic contaminated soil. The method comprises the following steps: step S1: selecting a cadmium-enriched castor-oil plant variety; step S2: obtaining cadmium-lead-arsenic composite contaminated soil with neutral acidity and alkalinity; step S3: planting cadmium-enriched castor-oil plants and ciliate desert-grass in an intercropping manner in the cadmium-lead-arsenic composite contaminated soil with neutral acidity and alkalinity for surviving and growth, and harvesting matured castor-oil plants at regular intervals, and carrying out step S5; step S4: harvesting the upper part of the ciliate desert-grass according to the growth height of the ciliate desert-grass, and carrying out the step S5; retaining stubble of the ciliate desert-grass on the soil surface, and carrying out the step S3; step S5: feeding the harvested and matured castor-oil plants and ciliate desert-grass to an exclusive place for concentration and carrying out innocent treatment. The invention further provides a phytoremediation method for managing cadmium contaminated soil. The phytoremediation method is suitable for managing and repairing cadmium-lead-arsenic moderately and slightly contaminated soil, and has good practical application prospect.

A plant method for in-situ treating the soil polluted by Cd features that the plant Dongnan Jingtian is directly planted in the polluted soil for absorbing the Cd from the soil and after the plant is growing for 3-4 months, it is removed. Its advantages are high effect and speed and no secondary pollution.

The invention discloses a method for restoring and treating caesium and/or strontium polluted soil by using red spinach. The method is characterized by comprising the following steps of: planting the red spinach in the soil containing caesium and/or strontium pollutants, and harvesting the red spinach plant or moving the integral red spinach plant from the polluted soil when the red spinach plant grows to a flowering period or a mature period; and further, planting the red spinach of the next batch, moving the integral red spinach plant from the polluted soil when the red spinach plant grows to the flowering period or the mature period, and repeating the processes till the caesium and/or strontium content of the soil reaches the environmental safety standard. The method has the advantages of low energy consumption, low cost, low environmental perturbation, incapability of destroying the environmental soil structure and physicochemical property or causing secondary pollution and good soil treatment effect, can beautify the environment at the same time of treating the polluted soil, and permanently solves the pollution problem of the caesium and/or the strontium in the soil.

The invention relates to a method for restoring heavy metal polluted soil with an energy crop castor and belongs to the technical field of ecological restoring of a polluted environment. According to the method, the castor is planted in the heavy metal polluted soil, can grow normally and does not represent any toxicity phenomena; the heavy metal concentration of an above-ground part is higher than that of a root; and the castor represents extremely high transfer ability. According to the method, the plant is used for restoring the heavy metal polluted soil, heavy metal pollutants such as Cd, Ni, Cu, Mn, Zn and Pb in the soil can be removed via a plant extraction process, and the method has a certain economic value at the same time.

A method for screening out super-accumulated plants from flowers and plants includes applying preliminary screening experiment to select out flowers and plants with high tolerance and high accumulation property and then applying pot culturing and water planting experiment to verify that flowers and plants have character of super-accumulated plant and have repair potentiality of plant.

The method for repairing arsenium-contaminated environment is characterized by that the spora of pteris cretica can be directly sown into the arsemium-contaminated environment (soil, tails and wet land) or the seedling-dividing mode is adopted to transplant the seedlings of pteris cretica into the arsenium-contaminated environment (soil, tails, wet land and water), the root system of pteris cretica can be used for mass-absorbing arsenium from environment and conveying it to aerial portion, and when the plant is grown to 30-50 cm height, said plant can be moved away and can carry away lots of arsenium so as to attain the goal of repairing arsenium-contaminated environment.

The invention discloses a method for repairing lead and zinc polluted soil by utilizing accumulator plants-ryegrass and pig manure. The method comprises the following steps of: mixing the pig manure with the lead and zinc polluted soil; planting the ryegrass; fully uniformly mixing the pig manure with surface layer polluted soil under the condition that the applied concentration of the pig manure is 20-80g/kg; absorbing lead and zinc in the lead and zinc polluted soil through the root parts of the ryegrass; transferring the lead and the zinc to the overground parts of the ryegrass; when the overground parts of the plants are mature and can be harvested, moving away the plants from the polluted soil so as to achieve the purpose of removing lead and zinc pollution from the soil. As the ryegrass is good in regeneration capability and high in growth speed and can be repeatedly harvested without complex management, the energy consumption is low, the operability is good, the ecological safety is high, the environmental physicochemical property cannot be destroyed, the secondary pollution cannot be caused, a soil structure cannot be destroyed and polluted, the fertility improvement capability cannot be influenced, and the repair expense is further reduced.

The invention relates to the technical field of plant remediation of oil-contaminated soil, in particular to a method for treating and remediating oil-contaminated soil by using gaillardia aristata pursh flower plants. The method is to plant gaillardia aristata pursh in oil-contaminated soil. When the total petroleum hydrocarbon concentration of the soil is 10,000mg/kg, the growth amount of the plants is not inhibited basically, and the gaillardia aristata pursh can effectively degrade the total petroleum hydrocarbon in the oil-contaminated soil through the combined functions of the developed roots and root microbes to reduce the total petroleum hydrocarbon content in the contaminated soil. When the gaillardia aristata pursh is planted for 90 days, the degradation rate of the total petroleum hydrocarbon content in the contaminated soil can reach 56.63 percent which is nearly 4 times a blank natural degradation rate which is 15.49 percent. This proves that the gaillardia aristata pursh has high oil contamination resistance and high total petroleum hydrocarbon degradation capability. Thus, the total petroleum hydrocarbon in soil can be effectively removed by planting the gaillardia aristata pursh in the oil-contaminated soil, and removing all plants and well treating the plants in a centralized manner after the plants are mature.

The present invention relates to plant repair technique for polluted environment particular to use cone fieldcress with super accumulation/ super enrich of Cruciferae to repair Pd-polluted soil. Plant fieldcress on the Pd-polluted soil, when blossoming or maturing, move the plant to come to purpose. The root system of fieldcress absorbs lots of Pd and transfers them to top organ of stem and leaf. Move the fieldcress on proper time and plant next crop; repeat the process. Thereby, it brings away and gets rid of lots of above-norm Pd quickly and exhaustively.

The invention relates to a renovating technique for heavy metal polluting soil with plants, in particular to a method for renovating heavy metal polluting soil by utilizing an enrichment plant of Conyza canadensis. The Conyza canadensis is planted in soil containing pollutant cadmium, and the root system of the Conyza canadensis can absorb abundant cadmium in the polluted soil and transfer the cadmium to the overground organs; when the plant growths until the overground biomass is the most, the overground organs of the plant are moved away from the polluted soil, thereby the purpose of removing the pollutant cadmium in the soil can be realized. The invention utilizes the enrichment plant Conyza canadensis to govern the cadmium polluted soil, and has the advantages that the expense is low, and the maneuverability is strong, the physicochemical property of the soil is not damaged, secondary pollution can not be caused, and the effect of preventing aeolian erosion and water erosion of the soil are good, and the like.

A method for repairing the As polluted soil by plant feature use of Chinese brake herb which can absorb the As from the As-polluted soil. It includes such steps as culturing Chinese brake herb, transplanting it in said As-polluted soil by the density of 20*20 cm, and harvesting 2-3 times when the height of said Chinese brake herb is 50-100 cm.

The invention provides a method for restoring sludge land heavy metal contaminated soil. The method comprises the following steps: applying charcoal base fertilizer in the soil, uniformly mixing the soil with the charcoal base fertilizer, carrying out ageing, after the ageing, putting earthworms in the soil for cultivation, after introducing the earthworms in the soil normally, planting castor-oil plant and applying the charcoal base fertilizer in the soil simultaneously, after a certain period of time, removing the castor-oil plant overall, putting earthworms in the soil for cultivation, after introducing the earthworms in the soil normally, planting willows and applying the charcoal base fertilizer in the soil simultaneously, after a certain period of time, removing the willows overall, and repeating the steps in a circulating manner until content of heavy metal in the soil reaching the safe standard. With adoption of the method, the restoring treatment effect to the sludge land heavy metal contaminated soil is ideal, the treatment time is short, the territory applicability is wide, and secondary pollution to the soil can be avoided.

The invention discloses a method for utilizing chenopdium album L to restore the soil polluted by high-concentration cesium. The method comprises the steps of flattening and refining the polluted soil, applying 2200-3000kg of thoroughly decomposed excreta of people and animals for each 666.7M<2>, and taking the thoroughly decomposed excreta of people and animals as base fertilizers, planting the chenopdium album L in March to August every year, sowing 100-150g of seeds for each 666.7M<2>, blending fine soils, and sowing uniformly; then keeping 50%-70% of water holding capacity in soil field so as to promote germination and seedling; using a herbicide to removing other plants before the sowing in bare places so as to avoid overshadowing; when the height of the seedling is 50-60cm, harvesting the overground parts, and processing the overground parts intensively; and cleaning the harvesting fields, sowing again, managing and harvesting the chenopdium album L according to the method, thus harvesting the chenopdium album L for three times in one year. According to the method, the operation is simple, the management is convenient, the cost is low and the restoring effect is good.

The invention provides a method for repairing cadmium polluted soil by compositae plants, which comprises the following steps of: planting erigeron annuus in the cadmium polluted soil so as to greatly adsorb cadmium in the cadmium polluted soil by root systems of the erigeron annuus and transfer the cadmium to the part of the erigeron annuus above the ground; and when the erigeron annuus grows to the mature period, integrally moving away the erigeron annuus from the cadmium polluted soil so as to remove cadmium pollution in the soil. In the method, the erigeron annuus is used to carry out plant repair on the cadmium polluted soil, the perturbation to the environment is low, the physicochemical property of the soil is not damaged, the polluted soil can be stabilized, the wind erosion and the water erosion of the heavy metal polluted soil are reduced and the secondary pollution is not caused. Moreover, the erigeron annuus has strong adaptability and low requirement on a field management technology, is convenient for the field management and can take the effect of beautifying the environment when the polluted soil is repaired. Therefore, the low cost and a good repair effect are realized and the cadmium polluted soil is repaired without secondary pollution.

The invention relates to the field of phytoremediation technology of polycyclic aromatic hydrocarbons (PAHs) contaminated soil, in particular to a method for managing and remediating PAHs contaminated soil by utilizing Echinacea purpurea. According to the invention, plants are planted in PAHs contaminated soil to ensure that in the process from growth to blossom or ripening of the plants, the PAHs in the soil is degraded and removed or obviously decreased through the growth process of the plants and the combined effect of enzyme and small-molecule organic acid secreted by root system and rhizosphere microbes, wherein the plants are the Echinacea purpurea belonging to compositae. Proved by experiments, the content of the PAHs in the soil is effectively degraded by utilizing the combined effect of the developed root system of the Echinacea purpurea and the rhizosphere microbes. By means of the method disclosed by the invention, problems of great technical difficulty, high cost, large work quantity, easiness in causing secondary contamination and the like in the prior art can be solved. The method has the advantages of strong operability, low cost, no damage to soil physical-chemical property, and can purify and beautify the environment at the same time.

The invention relates to plant repairing technology of cadmium polluted soil, in particular to a method for repairing cadmium polluted soil by utilizing enrichment plant bidens tripartita. Bidens tripartita is planted on soil containing pollutant cadmium, the root system of bidens tripartita absorbs cadmium in polluted soil and transfers the cadmium to the overground part organ, the overground part organ is taken away from the polluted soil when the overground part organ of the plant grows to biomass liveweight maximum, thus realizing the aim of removing pollutant cadmium in soil. The invention utilizes enrichment plant bidens tripartita to treat cadmium polluted soil and has the advantages of low cost, strong operability, no destroy on soil physicochemical properties, no arising of secondary pollution and good effect on preventing wind erosion and water erosion of polluted soil.

The invention belongs to the polluted environment plant repairing technical field and in particular relates to a method for repairing cadmium-arsenic polluted soil by utilizing bidens pilosa. Bidens pilosa is planted on cadmium-arsenic polluted soil, thus realizing the aim of removing excessive cadmium-arsenic combined pollutant in soil. The invention utilizes that bidens pilosa has the cadmium hyper enrichment plant characteristic and arsenic rejection plant characteristic and is cadmium hyper enrichment and arsenic rejection plant, thus showing that the invention has strong application potential on plant repairing of cadmium-arsenic polluted soil. The invention has the advantages that work amount is less, physical and chemical properties of soil are not destroyed, no secondary pollution is produced, and water and soil can be preserved and environment can be beautified.

The invention relates to the technical field of phytoremediation of heavy metal pollution in the environment, in particular to application of willow herb to remediation of heavy metal lead pollution in soil. A specific method of the application comprises the following steps; planting willow herb in the soil with heavy metal lead pollution; regularly carrying out whole-plant harvesting on most of the willow herb; only cutting overground parts of a small part of the willow herb and leaving the underground parts of the small part of the willow herb in the soil to use the underground parts of the small part of the willow herb as seedlings in the next season; carrying out ashing processing on the harvested willow herb; extracting heavy metal lead so as to carry out remediation on the soil with heavy metal lead pollution. The growth characteristics and economic value of the willow herb are utilized to carry out remediation treatment on the soil with lead pollution. The application has the advantages that disturbance to the environment is small; the physicochemical property of the soil is not destroyed; secondary pollution cannot be caused; cost is low; the application is suitable for a large area of soil with heavy metal lead pollution; the application can be used for landscaping and decoration. Moreover, the accumulated heavy metal lead also can be recycled, so that a certain economic benefits are generated.

The invention relates to an improving agent for repairing contaminated soil and a modifying method. The improving agent is obtained through mixing of arbitrary one or more of 1-3 parts of calcium magnesium phosphate fertilizer, 0.5-7 parts of lime and 1.5-12 parts of modified zeolite. The improving agent is mixed with soil, passivation is performed, and planting of Bermuda grass on the soil and other improving methods are adopted to achieve the purpose of contaminated soil repairing. A chemical technology is combined with a plant technology, not only can the soil structure be protected so as to the antimony-contaminated soil in the case of low cost, but also the environment can be beautified.