33results about How to "No environmental risk" patented technology

The invention relates to a temperature-sensitive gel type heavy metal curing agent, a heavy metal contaminated soil curing and repairing method and a curing agent recycling method. The temperature-sensitive gel type heavy metal curing agent is a mixed water solution of a synthetic polymer material and a natural polymer material; the concentration of polymer materials in the mixed water solution is0.5 to 2 percent, and a mass ratio of the synthetic polymer material to the natural polymer material is (1 to 4):(6 to 9). Raw materials used by the temperature-sensitive gel type heavy metal curingagent disclosed by the invention are low in cost, are safe and efficient and are strong in targeting ability; a using method is simple and easy; secondary pollution to soil cannot be caused after thetemperature-sensitive gel type heavy metal curing agent is put into use for a long term, and the temperature-sensitive gel type heavy metal curing agent can be repeatedly recycled and utilized; a recycling method is simple and easy and has a wide application prospect in heavy metal contaminated soil repairing.

The invention discloses a method for remediating soil contaminated by heavy metals such as cadmium by combining in-situ leaching, deep-layer fixing and phyto-extracting. According to the method, the heavy metals are leached into a deep layer along with a leaching solution through the in-situ leaching in a surface layer and are fixed in the deep layer, then willow with the heavy metal accumulation function is planted after organic fertilizer is applied, and therefore the residual heavy metals can be further removed, and the soil function can be restored; the heavy metals in a plough layer are leached to the deep layer, the absorption of crops to the heavy metals is reduced, the heavy metals which are leached to the deep layer are fixed, underground water is not polluted, and therefore the residual heavy metals can be further removed through phytoremediation, and the soil function can be restored; an iron-containing compound used in the method does not destroy the soil structure and can serve as a rice field soil conditioner; and compared with the phytoremediation, the method has the advantage that the remediation efficiency can be improved, and compared with leaching remediation, the method has the advantage that the steps of excavating, stirring, separating and the like can be omitted. The invention provides the remediation method. The remediation method has the advantages of being short in time, low in cost and high in efficiency and having a wide application prospect in the field of remediation of a large-scale farmland contaminated by the heavy metals.

The invention discloses a method for comprehensive prevention and control of soil nematodes. It comprises the following steps: 1) Soil plowing treatment: sprinkle sesame residue on the surface of the facility soil caused by plant parasitic nematodes, and then plow; 2) Covering the distribution zone: dig a few in the facility soil after step 1) treatment. Pit, in each pit, bury a distribution belt with a small hole at one end, cover the distribution belt with a plastic film, and bury it with soil around the film; 3) liquid ammonia disinfection treatment: pass through the distribution belt Apply liquid ammonia to the soil of the facility; 4) Remove the film: After the liquid ammonia is sterilized, uncover the plastic film, then dry the soil of the facility, plant crops, and perform conventional field management. In the present invention, the combination of liquid ammonia and sesame residue has better soil disinfection effect and better soil disease treatment effect, and the synergistic utilization of the two is a good low-toxic, low-cost, high-efficiency soil root knot Nematode control methods.

The present invention relates to a method for calculating and rationally utilizing the theoretical model of fly ash resource utilization, comprising the following steps in sequence: A. Harmless treatment: collecting fly ash raw ash particles, and using PCSB curing agent to make the fly ash into a paste material After solidification, fly ash blocks are obtained; B. Drying: dry the solidified fly ash blocks to a moisture content of 15% to 20%; C. Crushing: crush the solidified fly ash blocks to less than 18 mesh, Solidified fly ash powder particles with a particle size of 0.9mm to 0.075mm or less; D. Blending: collect solidified fly ash powder particles, and mix solidified fly ash powder particles with a weight percentage of 2% to 10% into the concrete. The utilization method of the present invention can absorb a huge amount of fly ash, and can thoroughly solve the landfill construction landfill and environmental problems of fly ash; the single series of building material products formed have simple process, excellent performance, and lower overall cost than current products , not only easy to popularize, but also has no environmental risk, and has very significant social and economic benefits.

The invention belongs to the field of pollutant removal, and specifically discloses a method for using magnetic media to strengthen the collection of heavy metals in a desulfurization tower and an application thereof. Specifically, the method is to add a magnetic medium to the flue gas at the entrance of the desulfurization tower to promote the enrichment of heavy metals in the flue gas on the magnetic medium in the form of heterogeneous condensation or chemical adsorption; The spray layer and the magnetic adsorption layer are discharged from the outlet of the desulfurization tower, so as to intercept and capture the magnetic medium rich in heavy metals by using the dual functions of the spray droplets and the magnetic adsorption layer, so as to realize the removal of heavy metal pollutants in the flue gas. Enhanced capture. The invention can realize the enhanced capture of heavy metal pollutants in flue gas, avoid secondary pollution caused by powder escape, has high overall removal efficiency, strong safety and no environmental risk, and has the advantages of simple process flow and low operating cost. At the same time, it will not have a negative impact on the working status of the desulfurization system.

The invention discloses a water quality regulating agent for a rice-shrimp co-cropping system and a preparation method thereof, and relates to a regulating agent in the field of aquaculture. Components and weight percentages of the regulator: 1) Main components: macromolecular natural organic matter: 2-5%; aluminum-containing minerals: 40-45%; calcium-containing minerals: 20-25%; acid salts: 5-10% %; 2) Additional components: binder: 5-20%; foam: 0.1-0.5%; moisture: 5-15%. The regulating agent can greatly reduce the organic matter, nutrients and heavy metals in the water body during the co-cropping of rice and shrimp, increase the dissolved oxygen in the water body, improve the water quality, create conditions for the healthy growth and development of crayfish, and ensure the economic benefits of the co-cropping system of rice and shrimp. Compared with the traditional treatment method of applying materials, this regulator has high efficiency in improving water quality, is ecological and environmentally friendly, and has no environmental risks.

The invention discloses a soil treatment method for preventing and controlling plant parasitic nematodes. The method is to utilize liquid ammonia to disinfect the inside of the soil, comprising the steps of: 1) plowing the soil of facilities with serious parasitic nematode diseases to a depth of not less than 20 cm, and performing liquid ammonia disinfection treatment when the soil moisture content is below 30%. ; 2) The soil after the disinfection treatment is covered with film, (3) After the film-covered treatment is finished, it is naturally dried for 7-10 days after the film is removed, and the crops are planted after fertilizing and making a border, and conventional field management is carried out. Compared with other chemical disinfection methods, the method is safer, cheaper, non-toxic, non-residual, and has no environmental risk. At the same time, liquid ammonia disinfection can reduce the application of other nitrogen fertilizers and increase the nitrogen content of the soil; at the same time, it can reduce the use of other chemicals and achieve the double effect of weight loss and drug reduction.

The present invention relates to a process for the preparation of a storage-stable mixture comprising an MDT silicone resin having hydroxyl groups and an organic compound containing at least one epoxy group.

The invention discloses a spraying agent for reducing cadmium absorption of tobacco in soil, and preparation and use methods thereof. The spraying agent is prepared by adding a zinc salt into a mercapto-containing soluble organic acid solution obtained after plant straw fermentation. A Zn-organically complexing type spraying agent can make a cadmium content in tobacco leaves in cadmium pollution soil reduce 56.6-60.3%, and can make a cadmium content in tobacco stems reduce 46.7-54.8%.

The invention discloses a method for helping yellow catfish fry quickly pass through the sensitive period and effectively improving the survival rate, belonging to the field of aquaculture. The breeding management method is as follows: ① Pond preparation and small peng grass put in; ② Fry go to the pond and tame; ③ Maintain the ecological stability of the pond. The present invention has the following advantages and positive effects: ① Utilize the small canopy on the surface of the water body to attract enough bait in the area to attract the fry to float on the surface of the water body to feed, helping the fry to pass through the sensitive period quickly, and effectively improving the survival rate of the fry; ② Effectively avoiding the feeding habits of the fry The risk of disease brought by the bait organisms at the bottom of the pond; ③Improve the immunity of fry and enhance the resistance of fry to diseases; ④The operation method is simple and clear, the materials are easy to obtain, and it has the prospect of being demonstrable and easy to promote; ⑤It is an environmentally friendly technology Developed with a good safety record and no potential environmental risks.