122 results about "Pesticide contamination" patented technology

Compositions for and method of degrading organic chemicals in soil. The composition is a nutrient medium serving as a substrate for micro-organisms in the soil, preferably containing a major proportion of a source of carbon skeleton and energy, a macronutrient component preferably including nitrogen and other macronutrients, and a micronutrient component, preferably also a complexing agent and a vitamin / co-factor component. This nutrient material is added to soil, e.g. soil contaminated by a pesticide, to cause proliferation of micro-organisms which are effective, or which develop effectiveness to degrade the organic chemicals. Preferably the micro-organisms are those naturally present in the soil but useful micro- organisms may be added with the nutrient medium.

The invention relates to the field of sewage treatment unitization, in particular to a method for reducing pollution of mercury and pesticide residue in sewage. The method can effectively eliminate the pollution of the mercury in the sewage, the method has the advantages of being high in efficiency, low in nutritional requirement, simple in operation and high in safety, compared with existing other technologies, the cost of pollution treatment on the mercury and the pesticide residue in the sewage is obviously reduced, the efficiency of pollution treatment on the mercury and the pesticide residue in the sewage is improved, and the very important practical application value is achieved.

The invention relates to in-situ restoration of pesticide contaminated soil, in particular to a preparation method of microbe immobilized particles for restoring pesticide contaminated soil. Porous carbon is used as a main carrier material, and cellulose, chitosan and sodium alginate are used as auxiliary carriers to realize the purpose of immobilizing the microbes; and the obtained microbe immobilized particles are used for in-situ restoration of the pesticide contaminated soil. The carrier material used in the invention has cheap price, low cost, wide sources, good air permeability and no toxicity to organisms, and can not cause secondary pollution to the soil. The carrier and the immobilizing process thereof can be used for immobilizing multi-bacterium microbes, such as pseudomonas, bacillus, zoogloea, micrococcus and the like, and have certain broad-spectrum applicability; and the bacillus can reach more than 10 billions / gram. Compared with the prior immobilizing method, the invention is characterized by directly sowing the immobilized cell particles into the soil without destroying the original soil structure.

The invention discloses a nondestructive testing fruit surface stool and pollutants method and device, and it uses the fruit transmission component to promote the fruit rolling forward, shooting the fluorescence image of various fruit parts; use the laser of LASER to irradiate the surface of fruits, and the fluorescence inspired by the fruit passes the lens to enter the machine installed with the filter, and the election image intensifier, and the CCD camera to collect the different wavelength fluorescence image; using the computer system image acquisition card to get the image, and using the optimized method to get the fluorescence images of three characterized wavelength, and using three typical wavelength spectral images to do the gray statistics and proportion image computing, and then, according to the calculation results, predicting pesticide residues and surface pollutants; in accordance with the instructions given by the computer signal, using high pressure jet mouth to blow the failed fruits to the poor fruit chute. The invention provides a fast NDT fruit pesticide residues and surface pollutants method and device.

The invention discloses instant sweet potato starch noodles and a production method thereof. The instant sweet potato starch noodles comprise 70% of sweet potato starch, 10% of cassava starch and 20% of corn starch. The production method comprises the following steps of 1, raw material blending and pulp mixing, 2, self-curing and molding, 3, refrigeration and aging, 4, unfreezing, 5, washing and dehydration, 6, weighing and molding, 7, drying and examination, and 8, packaging. The production method utilizes pesticide pollution-free sweet potato starch as a main raw material and combines a traditional production technology. The instant sweet potato starch noodles are prepared carefully by an introduced high and novel technology, is pure and clean and has a white color, a soft and moist taste, a fresh and fragrant flavor and a high nutritive value.

The invention discloses a repair method of dipterex pesticide contaminated soil. As an optimal specific implementation scheme, the repair method comprises the steps of: (1) at least dissolving enough amount of soluble ferrite and enough quantity of a soluble oxidant respectively in water to obtain solutions; and (2) adding the soluble ferrite solution and the soluble oxidant solution as well as an acid solution to a dipterex pesticide contaminated soil, enabling the pH value of the formed mixed reaction system to be about 3, and standing the mixed reaction system until a dipterex pesticide in the soil is completely degraded. Further, the step (2) can also include the steps of: monitoring the content of dipterex pesticide in the mixed reaction system at regular time, and supplementing the soluble oxidant solution to the mixed reaction system. The repair method can effectively degrade dipterex and realize the repair of the contaminated soil, and is simple and easy to implement, low in cost and beneficial to scale implementation.

The invention discloses a metal organic framework material as well as a preparation method and application thereof, and relates to the technical field of preparation of materials. The preparation method of the metal organic framework material comprises the following step: performing reaction on a magnetic graphene oxide / aminocyclodextrin composite material formed by compounding a magnetic graphene oxide material with aminocyclodextrin, an organic ligand and a metal compound. The method is simple in preparation process, high in controllability, low in cost and favorable for large-scale production. The metal organic framework material is prepared by the method. The material is high in stability, high in acid and base resistance, resistant to matrix interference, easy to store, high in adsorption flux and low in economical cost and can realize quick enrichment and removal of pesticide pollutants.

The invention discloses an eluent for soil polluted by organochlorine pesticides and a repair method by using the same. The eluent comprises 5-10%v / v petroleum ether with the boiling range of 60-90 DEG C, 10%v / v of normal propyl alcohol, and the balance of water. The method for repairing the soil polluted by the organochlorine pesticides comprises the steps of: screening polluted soil; adding theeluent with the volume 2 times relative to the soil, heating and stirring; separating upper-layer liquid in a stirrer, carrying out soil-water separation on a lower-layer soil suspending liquid system through plate frame pressure filtration to complete elution repair. When the eluent is adopted to elute the polluted soil with the organochlorine pesticide concentration of 10-20,000ppm, the remove rate on target pollutants all can reach about 80%, and the elution cost is about 600-2,500RMB / ton of soil along with the different pollution degrees. The method has an application prospect on repairing the soil of an area polluted by closed and relocated organochlorine pesticide production enterprises.

The invention discloses a bacterium for effectively degrading glyphosate. The bacterium is called Aquamicrobium defluvii and is marked as YU 1-1, a strain is conserved in the China center for type culture collection in Wuhan University, and the conservation number is CCTCC NO.M2015816. The invention further discloses the glyphosate degradation characteristic and the biodegradation mechanism of the efficient pesticide degrading bacterium. By means of degradation product analysis, glyphosate molecules are first degraded into an intermediate product aminomethyl phosphonic acid (AMPA) and then further degraded into phosphate molecules and methylamine molecules to provide a phosphorus source and a carbon source for microbial growth. Metabolite of glyphosate degraded by the stain is nontoxic and high in environment affinity. The stain has high application value in treatment on water body environment polluted by glyphosate pesticide, treatment on soil environment and comprehensive treatment on current industrial sitepesticide pollution.

The invention discloses a system for in-situ removal and purification of peculiar smell of a pesticide contaminated site and a construction method of the system. The system comprises an in-situ removal module, a tail gas purification module and a tail water treatment module. The in-situ clearing module comprises an in-situ injection / extraction unit and a heating unit; the tail gas purification module comprises a leaching unit, a catalytic oxidation unit and an adsorption unit; the tail water treatment module comprises a primary treatment unit, an oxidation unit and a filtering and purifying unit. In-situ efficient decomposition / degradation of odorous substances is realized through a chemical treatment-heat treatment-extraction synergistic removal technology; meanwhile, a safe and energy-saving leaching, oxidation and adsorption tail gas purification process and an oil separation, flocculation, precipitation, neutralization, oxidation and purification tail water treatment process are coupled, and in-situ removal and purification of odorous substances in the pesticide field are realized through synergistic coupling of modules, units and technologies; the technical level of treating and repairing the peculiar smell of the pesticide field can be remarkably improved, and good market benefits and social benefits are achieved.

The invention discloses a biological organic fertilizer for co-cultivating a red bayberry forest and chicken. The fertilizer consists of the following raw materials in part by weight: 40 to 60 parts of livestock pen manure, 15 to 20 parts of bird pen manure, 15 to 30 parts of plant straw, 1 to 7 parts of effective microorganism (EM) strain, 2 to 5 parts of seedcake, 1 to 3 parts of seed type Chinese herbal medicines, 1 to 3 parts of all-grass and leaf type Chinese herbal medicines and 0.1 to 0.5 part of water-soluble antibiotic. The production method of the biological organic fertilizer for co-cultivating the red bayberry forest and chicken comprises the following steps of: 1, preparing raw materials; 2, mixing various raw materials except the antibiotic; 3, fermenting on bar stocks shaded from rain; and 4, drying, adding the antibiotic and mixing uniformly. The fertilizer is special for applying fertilizer to forest land during co-cultivation of the forest and chicken and has the advantages of reducing using amount, enhancing effect, removing pests, killing ova and parasites in chicken, preventing red bayberries, chicken and the forest land from being polluted by high-toxicity pesticides, preventing the forest land from being hardened and the like.

The invention provides a soil remediation agent prepared from crop straw as a raw material. The crop straw is pretreated through steam explosion, so that the utilization efficiency of effective components in the crop straw is improved, the exploded straw powder is subjected to fermentation and pyrolysis activation treatment to prepare a fermentation product of the straw and biochar respectively, the fermentation product and biochar are mixed with straw powder, attapulgite, ground phosphate rock, plant ash, an oxidant, a water-retaining agent and other auxiliary components to prepare the soil remediation agent. The soil remediation agent is good in remediation effect, free of toxic and side effects, convenient to prepare, capable of rapidly remedying soil contaminated by organic matter, especially pesticide, capable of efficiently remedying contaminated soil and capable of achieving resource utilization of biomass resources, especially crop straw.

Disclosed is a method for planting and processing ratoon rice. The method comprises the steps that 1, a not-easy-to-fall variety without pests and diseases with strong regeneration ability, and excellent rice quality is selected; 2, seed cold induction processing is conducted in February every year, seed soaking is conducted in middle and late March, breeding is conducted after seed soaking is conducted for 30-40 hours, and heat preserving and rice seedling raising are conducted in the process; rice transplanting of the first season is conducted in late April; 3, field management is conducted,and the field management comprises field drying, fertilizer applying, preventing and controlling of pests and diseases and water management; 4, harvesting is conducted, and the harvesting time of thesecond season is delayed compared with the harvesting time of regularly planted rice; 5, processing is conducted, and the processing comprises the working sections of cleaning, husking and rice milling. According to the method, by selecting an excellent original longevous rice variety and a cold induction processing technology, a foundation is laid for obtaining rice with high quality and high yield through the ratoon rice, and the yield is increased by 20% compared with the rice planted by a conventional method in the same period by combining and optimizing the sowing time and the field management. The method has the advantages that the quality of rice is good, pesticide contamination is not contained, the processing cycle is scientific and reasonable, and the quality of finished products is high.

The invention provides a remediation method for pesticide-contaminated soil based on degradation by laccase. The method comprises the following steps: controlling the pH of the soil to be remediated to 3.5-7.5, adding the laccase and mediator HBT, adjusting the moisture content of the soil to 15-60%, and in the environment of 10-40 DEG C, performing illumination by natural light while keeping continuous ventilation for 24-48 h to remediate the pesticide-contaminated soil. The method provided by the invention adopts the laccase to remediate the pesticide-contaminated soil, and has the advantages of high efficiency, environmentally friendliness and no secondary pollution; the property range of soil applicable to the laccase used in the method is wide, the laccase has a good effect when usedin the natural environment, and the catalytic reaction can be performed under milder conditions; the HBT mediator used in the method promotes binding sites of the laccase and target pollutants, maximizes the laccase reaction efficiency and reduces the reaction time of the entire reaction system; therefore, the method has the characteristics of a short remediation period, a good remediation effectand no secondary pollution.

The invention discloses a method for applying waste straw to organic pesticide soil pollution control, comprising: collecting waste straw, crushing, drying, compacting, and carbonizing at 300-500°C for 2-6 hours to obtain straw biochar; Put the straw biochar into non-woven bags and linen bags, and then add it to the pesticide-contaminated soil at a depth of 20-50cm and a density of 20-50 grams per square meter. The biochar bag is taken out, and the adsorbed pesticide is extracted by an organic solvent, and the adsorbent is regenerated while transferring the pesticide in the soil. The invention solves the two major agricultural problems of agricultural waste straw treatment and soil pesticide pollution control; pollution control materials are natural, rich in content, non-toxic, low in cost, simple in operation process, remarkable in purification effect, fast in adsorption, and straw carbon After adsorbing pesticide pollution, solid-liquid is easy to separate, easy to recycle, and prevent groundwater pollution.

A nutritive chemical fertilizer for agricultural plants is prepared from 14 Chemicals including thiophanate-methyl, mancozate, trisodium phosphate, calcium nitrate, magnesium sulfate, etc. Its advantage is high effect on providing nutrients and preventing and eliminating diseases and pests, and no pollution.

The invention provides a technology for removing residual antibiotics / pesticides in oil in situ and remediating soil and application, and belongs to the field of environmental protection. The technology comprises the following steps: adding FeCl2 to the soil polluted by antibiotics and organic pesticides; irradiating with ultraviolet rays; then adding proper amount of hydrogen peroxide / ozone water; and stirring to completely oxidize and decompose all antibiotics and / or organic pesticides. With the adoption of the technology, all antibiotics and / or organic pesticides are completely oxidized and decomposed, so that secondary pollution is avoided, and the pollution and harm of antibiotics and pesticides to the soil can be removed; the environment and the ecological system can be protected; and the human sustainable development is kept.

The invention discloses a method for remedying pesticide-contaminated soil. The method includes spraying pretreating agents in pesticide-contaminated soil regions; applying soil remedying agents intothe soil after the soil is completely wetted by the pretreating agents; hermetically piling the soil for 3-5 d; spraying buffer agents; spraying water to regulate the humidity of the soil after the soil is completely wetted by the buffer agents; carrying out maintenance for 1-2 d. The pretreating agents are mixed aqueous solution of surfactants, oxidizing agents and buffer salt, and the soil remedying agents are active adsorbents loaded with microbial remedying agents. The method has the advantages that the pretreating agents with the surfactants and the oxidizing agents are sprayed to to-be-treated soil surfaces at first, pesticides in the soil can enter liquid-phase oxidization environments in an accelerated manner and further can be degraded by the active adsorbents loaded with the microbial remedying agents, and accordingly the contaminated soil can be remedied.

The invention relates to the technical field of crop straw application, in particular to a restoring method for soil contaminated by organophosphorus, organochlorine and pyrethroid pesticides. After a contaminated block is shallowly ploughed, wheat straw obtained by fermentation with inoculated radioactive soil bacillus LQC-99 is applied, the fermented products are applied to the contaminated block according to a proportion of 30-50kg per mu for even blending, the soil surface is covered with straw, restoring is completed in 8-10 days, and the straw covering the soil surface is removed. The restoring cost is low, the restoring method is simple, the restoring time is short, the degradation rate of the organophosphorus, organochlorine and pyrethroid pesticides is above 91.33%, and no secondary contamination is generated by restoring.

The invention provides a composite microbial inoculum for repairing OCP (Organochlorine Pesticide) polluted soil, a preparation method of the composite microbial inoculum for repairing the OCP polluted soil, and a repairing method of the soil by using the composite microbial inoculum. A microbial body of the composite microbial inoculum comprises pseudomonas aeruginosa, pseudomonas putida, stenotrophomonas maltophilia and flavimonas oryzihabitans. Enriched culture is carried out on the strains of pseudomonas aeruginosa, pseudomonas putida, stenotrophomonas maltophilia and flavimonas oryzihabitans, then freeze-drying is carried out to obtain bacterial powder, and the bacterial powder is mixed to obtain the composite microbial inoculum. After the polluted soil is ground, mung bean powder and the composite microbial inoculum are added and the soil is covered with plastic films after plowed, and later plowing is regularly carried out and the content of organochlorine is detected, so that the polluted soil is repaired. The composite microbial inoculum disclosed by the invention has low cost and the four strains are in a mutual synergistic effect, so that the degradation effect of the composite microbial inoculum on OCPs is obviously superior to the sum of the degradation effects of the single strains. The degradation rate of a microflora of the composite microbial inoculum on the polluted soil is much higher than that of the single strains in the repairing process of 45 days under summer natural environment conditions, the degradation rate of the microflora in 15 days can reach more than 20%, and the effect is obvious. Furthermore, the process is simple and the cost is low.

The invention relates to the field of soil remediation, in particular to a soil pollution treatment method for ecological environment remediation, which comprises the following steps: S1, scarifying soil; S2, preparing a soil remediation agent; S3, preparing mixed soil; S4, conducting maintenance; and S5, conducting inspection and acceptance check. The soil remediation agent comprises the following components in parts by mass: 10-20 parts of quick lime, 12-16 parts of fishbone dust, 10-15 parts of medical stone powder and 3-6 parts of dextrin. The soil pollution treatment method has the beneficial effects that the soil pollution treatment method is easy to operate, workers can conveniently remedy and treat soil contaminated with pesticides, and meanwhile the soil remediation effect can bebetter improved.

The invention discloses a solid flower fertilizer formula and process. The formula ratio is 1-2 parts of potassium nitrate, 1.2-1.5 parts of calcium superphosphate, 0.5-0.9 parts of calcium nitrate, 0.8-1.5 parts of magnesium sulfate, and 0.01-0.1 parts of iron sulfate , 0.01-0.05 parts of manganese sulfate, 0.001-0.01 parts of borax, 0.001-0.005 parts of zinc sulfate, 0.001-0.005 parts of copper sulfate; can make full use of planting time, planting flowers are not limited by seasons, and can be carried out in any season; Invaded by bacteria in the soil, no pests and diseases occur, so there is no need to use pesticides to avoid pesticide pollution; flowers can grow luxuriantly without removing clutter and impurities; there will be no mildew and rotten smell caused by fertilization; dedicated to The cultivation of various flowers can also be used for the cultivation of various vegetables.

The invention belongs to the technical field of agriculture product storage, and particularly relates to a method for storing triennial daffodil bulbs. The method includes the steps of screening the bulbs, soaking the bulbs in a pesticide solution, conserving, drying and storing the bulbs, soaking the bulbs in a pesticide solution composed of a formaldehyde solution, a dicofol emulsifiable concentrate, thiophanate methyl wettable powder and captan wettable powder, and evenly mixing edible fungi waste with domestic sludge in proportion to form paste material as bulb conservation material wrapping base parts and lateral buds of the whole bulbs. Thus, the phenomenon that great soil loss and soil fertility drop are caused when soil is used as the bulb conservation material can be avoided, the phenomenon that the bulbs and the warehouse environment are contaminated by pesticides when a lot of pesticides are sprayed in warehouses can be avoided as well, and the method has remarkable ecological environment protection benefits.

The invention discloses a composite catalytic oxidation degradation method and a device for organochlorine pesticide contaminated soil, and relates to the technical field of soil remediation.The composite catalytic oxidation degradation method comprises the steps of S1, soil pretreatment, S2, soil leaching, S3, wastewater treatment, S4, wet soil treatment and S5, detection and evaluation.The majority of organochlorine pesticides in the soil are rapidly removed through leaching, organochlorine pesticide residues are rapidly reduced, and the content of the organochlorine pesticides in the soil is reduced; the residual organochlorine pesticide content in the wet soil is removed through thermal desorption, the removal rate of the residual organochlorine pesticide in the soil is high, the wastewater obtained after leaching is subjected to catalytic oxidation, the organochlorine pesticide in the wastewater is rapidly degraded, and the wastewater is recycled after being purified, so that the method is more environment-friendly and energy-saving.

The invention discloses immobilized carboxylesterase and a preparation method and application thereof. The carboxylesterase EstC is apoenzyme, and ZIF-8 is an immobilized carrier. The preparation method comprises the following steps of: (1) after carboxylesterase solution is mixed with 2-methylimidazole solution, adding zinc acetate solution, carrying out oscillation again, and after even mixing is carried out, reacting in a table concentrator at a temperature of 20-40 DEG C for 15-60 min; (2) carrying out centrifugation on reactant to obtain centrifugation supernatant and a centrifugation product; and (3) washing and drying the centrifugation product for multiple times to obtain the immobilized carboxylesterase. The immobilized carboxylesterase has high immobilization efficiency and goodactivity. Compared with free enzyme, the immobilized carboxylesterase further improves tolerance for reaction environment and parts of organic solvents and detergents, and shows good recycling performance. The immobilized carboxylesterase is applied to an aspect of bioremediation pesticide pollution, can generate an obvious hydrolysis function for chlorpyrifos, and has the good recycling performance.

The invention provides a graphene nano composite material as well as a preparation method and application thereof. The graphene nano composite material provided by the invention is a nano material which takes a single layer of rGO as a primitive material, and then TiO2-x nano particles are attached to the primitive material, wherein the x is 0.05-0.45. According to the graphene nano composite material, the TiO2-x nano particles with oxygen holes are attached to the surface of the rGO element material, so that the light absorption range of the nano material is expanded, the nano material can absorb visible light of a full-visible spectrum, the utilization of the nano material on the visible light is improved, the nano material has excellent photocatalytic performance, and the nano materialis suitable for efficient photocatalytic treatment on neonicotinoid pesticide pollutants.

The invention discloses a method for interplanting high-temperature type edible mushrooms with sugarcane. The method comprises the steps of land preparing, sugarcane planting, preparation of a culture medium for high-temperature type edible mushrooms, inoculating, interplanting preparation, interplanting, interplanting management, interplanting ending and the like. According to the method for interplanting high-temperature type edible mushrooms, the yield of sugarcane and the yield of high-temperature type edible mushrooms are both increased; the obtained high-temperature type edible mushrooms are free of contamination of pesticides of sugarcane, free of damage to the surface and high in quality, the planting cost of edible mushrooms is reduced, and the income of farmers is increased.

The invention discloses an eluent for soil polluted by organochlorine pesticides and a repair method by using the same. The eluent comprises 5-10%v / v petroleum ether with the boiling range of 60-90 DEG C, 10%v / v of normal propyl alcohol, and the balance of water. The method for repairing the soil polluted by the organochlorine pesticides comprises the steps of: screening polluted soil; adding theeluent with the volume 2 times relative to the soil, heating and stirring; separating upper-layer liquid in a stirrer, carrying out soil-water separation on a lower-layer soil suspending liquid system through plate frame pressure filtration to complete elution repair. When the eluent is adopted to elute the polluted soil with the organochlorine pesticide concentration of 10-20,000ppm, the remove rate on target pollutants all can reach about 80%, and the elution cost is about 600-2,500RMB / ton of soil along with the different pollution degrees. The method has an application prospect on repairing the soil of an area polluted by closed and relocated organochlorine pesticide production enterprises.

The invention relates to a carboxylesterase D-1CarE5 having an amino acid sequence represented by SEQ ID NO.1 and a gene thereof, and provides a coding gene D-1CarE5 of the carboxylesterase, a recombinant vector of the carboxylesterase gene D-1CarE5, and a recombinant strain of the carboxylesterase gene D-1CarE5. The carboxylesterase has the following properties: the carboxylesterase has an optimum temperature of 40DEG C and an optimum pH value of 7.38 when alpha-naphthyl acetate is used as a substrate; the carboxylesterase can be activated by metal ions comprising Mn<2+> and Zn<2+> when the final concentrations of the metal ions are 1mM, and can be strongly inhibited by Cu<2+>, Ag<+>, Hg<2+>, Pb<+> and the like; the carboxylesterase keeps basically stable at 35DEG C for 50min; the activity of the carboxylesterase after processed with buffer solutions having a concentration of 1 / 15mol / L and pH values of 5.91, 7.38 and 8.04 for 80min is above 40%, 90% and 45% respectively; and simultaneously the carboxylesterase can hydrolyze beta-naphthyl acetate. The carboxylesterase can be applied to pesticide residual or pesticide pollution treatment.

The invention relates to the technical field of water treatment, in particular to an underground water remediation method for a pesticide contaminated site, which comprises the following steps: homogenizing and regulating underground water of a pesticide contaminated site; carrying out magnetic coagulation treatment on the homogenized and regulated water body; adjusting the water body subjected tothe magnetic coagulation treatment to be acidic and carrying out micro-electrolysis treatment; adjusting the water body subjected to micro-electrolysis treatment to be acidic and carrying out heterogeneous catalytic oxidation treatment; adjusting the water body subjected to heterogeneous catalytic oxidation treatment to be alkaline, and sequentially carrying out flocculation and precipitation toobtain supernatant; pumping the supernatant into an activated carbon adsorption tank for adsorption treatment, and discharging the supernatant after the supernatant reaches the standard. The method has pertinence and specificity for underground water pollutants in a pesticide field, can efficiently degrade pesticides in underground water in a short time, is good in treatment effect, high in removal efficiency and free of secondary pollution to the environment, and is simple and easy to operate, and investment and operation costs are greatly reduced compared with a conventional treatment method.