184 results about "Soil contamination" patented technology

The method is used for locally testing underground soil contamination by determining the generation rate of a first contaminant fluid in porous soil. The method includes the steps of making a hole of known dimensions in the soil, with the hole defining a first and a second spaced-apart portions; covering the hole, so as to define a closed volume in the hole; constantly injecting a second fluid in the hole at a constant given flow rate at said first portion of the hole, while simultaneously collecting fluid samples at the above-mentioned constant given flow rate at the second portion of the hole; measuring the concentrations of the first contaminant fluid from the fluid samples collected at known time intervals; and computing the generation rate of the first contaminant fluid, from the known volume of the hole and from the concentrations previously measured and originating from samples collected at the known time intervals. The probe used to carry out the above-described method has a rigid hollow body in which a semi-rigid tube is axially slidable. The probe can be driven through the ground and then partially retracted, to form a hole of known dimensions. The flexible tube is axially displaced so that its lower bored extremity is positioned near the bottom end of the hole, while the hollow rigid body of the probe has an annular opening about the tube at the upper end of the hole. The second fluid can then be circulated in the hole between the lower end of the tube and the annular opening of the probe rigid main body.

The invention relates to a fertigation control system for planting crops. The fertigation control system comprises a fertilizer container, a water source device, a control system and the like, wherein the control system comprises a controller and control branches, the controller is used for respectively controlling startup devices of the fertilizer container and the water source device by the control branches, wherein a fertilizer outlet pipe of the fertilizer container is converged with a water outlet pipe of the water source device and is then branched into a plurality of irrigation pipes communicated to an irrigation region. The fertigation control system disclosed by the invention can provide a fine fertigation scheme according to program control and soil situations and growth requirements of different stages of crops, is capable of sufficiently absorbing moisture and nutrients and cannot cause soil pollution.

The composite tiny organism formulations comprises a plurality of single tiny organism flora, hormones generated from culturing respectively a plurality of single tiny organism flora, and hormones generated from obliquity culturing each single tiny organism flora. The composite tiny organism formulations can be applied to soil improvement, activating soil, degrading soil contamination effectively and assistanting agronomic crop growth.

The invention belongs to the technical fields of control of soil pollution and quality safety of agricultural products and provides a method for restoring paddy cadmium pollution by combining water management with passivator adding in order to solve the control problem of paddies with severe cadmium pollution. The method comprises the steps that cadmium polluted paddy soil is treated through a composite passive material, rice is transplanted, water management is conducted, and the composite passive material is formed by proportionally mixing natural palygorskite and sulfydryl-modified palygorskite. Rice with the cadmium content reaching the standard can be produced through the paddy soil with severe cadmium pollution, the soil pollution problem is solved, the food security is ensured, and the method is significant. The composite passive material is easy to apply, low in cost and free of adverse effect on environment and does not influence regular growth and yield formation of rice, and the passivation effect on cadmium in soil can be maintained for 3-4 years by applying the composite passive material to soil once. After the composite passive material is applied to the cadmium polluted paddies soaked in water for a long time, the effect that cadmium accumulation is reduced is remarkable, and the cadmium content of produced brown rice meets the current national standard.

The invention relates to the technical field of agricultural land environment pollution evaluation, and particularly relates to a method for evaluating heavy metal pollution and potential ecological risks of agricultural land. The method comprises the following steps: firstly, performing sampling, then chemically measuring the content of heavy metals in soil, and on the basis of analyzing the pollution degree of agricultural land by adopting a land accumulation index method and an improved inner Meiluo comprehensive pollution index method, providing a set of new evaluation method for comprehensively considering the soil, the pollution space-time trend, the diagenetic effect, the influence of human activities on the environment and other aspects. According to the method, the limitation of atraditional potential ecological risk evaluation method is overcome; accuracy and scientificity of agricultural land heavy metal pollution risk evaluation are improved to a certain extent, ecologicalrisks of heavy metals in soil can be comprehensively and accurately evaluated, and substantial method guidance is provided for agricultural land heavy metal pollution monitoring, environmental management and ecological protection.

The invention discloses a soil contamination repairing agent. The soil contamination repairing agent is prepared from, by weight, 25-35 parts of bentonite, 17-20 parts of poly diallyldimethylammonium chloride, 15-20 parts of mica, 10-15 parts of nano waterborne adhesive, 6-12 parts of chitosan fibers, 0.004-1 part of polyethylene glycol acrylate, 24-36 parts of anionic polyacrylamide, 12-22 parts of monopotassium phosphate, 5-11 parts of nano-hydroxyapatite, 25-45 parts of culture pond sludge, 11-19 parts of bamboo pulp, 6-14 parts of ferric sodium edelate, 11-19 parts of sugar alcohol magnesium, 0.8-1.8 parts of enzyme microorganisms, 45-65 parts of Maya blue powder and 1-3 parts of mixed microbes. The repairing agent has the functions of soil contamination treatment, soil improvement, degradation of pesticide and fertilizer residues, increase of soil nutrients and the like.

The invention relates to a treating method of high-concentration heavy metal polluted building waste. The method includes: stripping surfaces of the building waste, smashing, washing, separating solid and liquid to obtain the cleaned building waste the water-soluble heavy metal of which is removed, adding an isopropylamine glyphosate solution into the cleaned building waste, eluting to remove the heavy metals, adjusting the pH value to be neutral, separating solid and liquid, washing the waste after elution with water and separating solid and liquid. The heavy metal contents in the building waste after air drying are lower than the three-level standard thresholds of the environmental quality standards (GB15618-1995). The building waste after air drying is subjected to a leaching test by utilization of an HJ/T229 leaching method, and the heavy metal contents in the leachate are lower than the thresholds of the standards for hazardous wastes (GB5085.3-2007). The building waste after air drying can be directly buried and stacked without pollution to the soil, and can be used as a regenerated roadbed material and a concrete aggregate. The method is simple in process and capable of completely eliminating the hazard of the polluted building waste, and has good environmental benefit, economic benefit and social benefit.

The producing method of composite tiny organism formulations in the invention is to culture respectively a plurality of single tiny organism flora to generate many activity organic matter, obliquity culture each single tiny organism flora according to particular order to form composite tiny organism formulations. The composite tiny organism formulations comprises a plurality of single tiny organism flora, hormones generated from culturing respectively a plurality of single tiny organism flora, and hormones generated from obliquity culturing each single tiny organism flora. The composite tiny organism formulations can be applied to soil improvement, activating soil, degrading soil contamination effectively and assistanting agronomic crop growth.

The present invention provides a method for removing phosphorus and nitrogen contained in sewage or wastewater using iron ore wastewater. According to the method of the present invention, in which the phosphorus and nitrogen contained in sewage or wastewater are crystallized in the form of struvite using iron ore wastewater containing a large amount of Mg²⁺ produced in a process of upgrading low-grade iron ore and removed, it is possible to reduce the cost of Mg²⁺ and the cost of iron ore wastewater treatment, thereby earning economic profits. Moreover, it is possible to prevent water pollution by the removal of the phosphorus and nitrogen contained in sewage or wastewater. Furthermore, it is possible to use struvite crystals obtained as a by-product as a time-release compound fertilizer so as to reduce the amount of fertilizer used and the number of fertilizations, thereby reducing soil contamination.

The invention relates to a corn cob modified activated carbon adsorption material for soil heavy metals and a preparation method of the adsorption material, and belongs to the technical field of soilpollution ecological restoration. The corn cob modified activated carbon adsorption material for the heavy metals has a porous carbon material with a corn cob structure, and is prepared by the following steps: after dried corn cob adsorbs a potassium permanganate solution, performing drying, performing pyrolysis in a nitrogen protective atmosphere to obtain corn cob-shaped biochar, dipping the corn cob-shaped biochar into a sodium hydroxide or potassium hydroxide solution, and performing drying to obtain the corn cob modified activated carbon adsorption material for the heavy metals. The adsorption material has a volume and strength similar to those of the corn cob, is very convenient for landfilling and recycling when soil is ploughed, has a good adsorption effect on the heavy metals in the soil, high efficiency and less time consumption, can permanently remove the heavy metals that contaminate the soil, does not cause secondary pollution to the soil after being used for multiple times, and can enhance soil fertility; and the preparation method provided by the invention has a simple process and simple operation, and is convenient for large-scale industrial production and application.

In a method of resolving a contribution ratio to soil contamination by a plurality of polluters through a sequential extraction scheme and a stable isotope analysis scheme, Pb stable isotopes are eluted at 5 types of “cation exchange fraction”, “carbonate fraction”, “iron-oxide and manganese hydroxide-fraction”, “organic matters and sulfide fraction”, and “residual fraction” existing at other types and separated from each other in each step. The Pb stable isotopes obtained in each step are analyzed.

The contribution ratio to soil contamination by the polluters is resolved through a predetermined resolving equation using the content of a Pb stable isotope in each step based on the content ratio of the Pb stable isotopes. The Pb stable isotopes are ²⁰⁶Pb and ²⁰⁷Pb.

The invention relates to an organic fertilizer composition prepared from tenebrio molitor manure. The organic fertilizer composition is prepared from the following raw materials in percentage by mass: 65-75% of tenebrio molitor manure, 8-10% of loess, 8-10% of tobacco stalks, 4-6% of vermiculite, 4-6% of perlite and 1-3% of original liquid of EM (Effective Microorganisms), wherein the sum of the content of the above ingredients is 100%. The invention further relates a preparation method of the organic fertilizer composition. The method comprises the steps of firstly weighing the raw materials, then, crushing and screening the raw materials, then, adding materials in an obtained mixture, then, fermenting the mixture, then, adding materials, and finally, extruding the fermented material by a dry extrusion granulator, thereby obtaining the organic fertilizer composition. The organic fertilizer prepared by the method has the advantages that the fertility can meet the requirements on various plant required elements, the problem of land pollution caused by the use of chemical fertilizers is avoided, the fertilizer effect can be maintained in soil for a long term, the growth of crops is promoted, the waste is sufficiently utilized, the waste is changed into the valuable, and the pollution to the environment is reduced.

The invention discloses a method for storing waste concrete and sealing carbon dioxide in a newly-abandoned coal mine. All roadways of the newly-abandoned coal mine are separated, and the size of eachspace after separation is determined; from the end farthest away from a portal of the newly-abandoned coal mine, separation walls are constructed in sequence according to the determined size of eachspace after separation; a material transportation system of the newly-abandoned coal mine is adopted to transport the waste concrete into the space after separation for accumulation, and in the accumulation process, a water supply system is adopted to spray saturated lime water; sealing walls are constructed to seal the space where the waste concrete is accumulated, and high-pressure pipelines arearranged on the sealing walls; after the sealing walls meet the sealing requirements, by means of compressed air pipelines, connected with the high-pressure pipelines, of the newly-abandoned coal mine, the carbon dioxide gas is injected into the space; when injection of the carbon dioxide gas with a certain volume is completed, injection is stopped, and the high-pressure pipelines are sealed. Bymeans of the method, the purposes of waste concrete placement, newly-abandoned coal mine filling and carbon dioxide sealing can be achieved, and soil pollution and the atmospheric greenhouse effect can be reduced.

The invention discloses a special higher-utilization-ratio environment-friendly coated fertilizer for blueberries. The invention is characterized in that the fertilizer is prepared from the following raw materials in parts by weight: 1-3 parts of rhizobia, 1-2 parts of Azotobacter chroococcum, 1-3 parts of Bacillus megatherium, 34-37 parts of soybean meal, 30-34 parts of rape seed cake, 45-50 parts of clover stover, 1-2 parts of borax, 3-5 parts of bentonite, 7-11 parts of sodium humate, 4-6 parts of castor oil, 3-5 parts of diglycol, 2-5 parts of vitrified microbead, 14-20 parts of hydroxypropyl methyl cellulose, 4-7 parts of gypsum, 7-9 parts of effective microorganisms and 9-12 parts of soil conditioner. The fertilizer solves the problem of low utilization ratio of nitrogen; the nitrogen fixation fungus added in the fertilizer can reduce the application amount of the nitrogen fertilizer, and lowers the ecological environment for land pollution protection; proper proportions of phosphate fertilizer and potassium fertilizer are added according to the fertilizer demand characteristics of blueberries to satisfy the nutrients required in the whole blueberry growth period; the coating technique is utilized to enable the fertilizer to release nutrients slowly for a long time and implement balanced wants and needs of the blueberries, thereby avoiding the phenomenon of seedling burning due to overfertilization; and the fertilizer can promote blossoming and fruiting of the blueberries and enable the blueberries to come into the market in advance.

The invention relates to the technical field of soil contamination improvement as well as repairing and treatment and particularly discloses a soil improvement agent for repairing soil Cd pollution. The soil improvement agent comprises the following components including, by weight, 45%-49% of lime, 45%-49% of zeolite, 4%-6% of superphosphate and 0.8%-1.2% of biomass charcoal. The invention furtherdiscloses an application method of the soil improvement agent for repairing soil Cd pollution. The application method comprises the following steps of uniformly applying the soil improvement agent tosoil, wherein the additive amount of the soil improvement agent is 1.25 kg.m<-2>-5kg.m<-2>. When the soil improvement agent is applied to soil severely polluted by Cd, the effective-state content ofCd in the soil can be effectively reduced, the content of Cd in unpolished rice is lowered, and the rice yield is increased to meet the national hygienic standard of grains.

The invention relates to an anti-penetration tundish dry liner which is produced by adopting non-ferrous melting aluminium scruff ash. Dry indefinite form fire resisting material for a working layer of the continuous casting tundish is produced by replacing spinel (or high bauxite) and silicon carbide by non-ferrous melting aluminium scruff ash as additive, using magnesite, olivine, calcite or limestone as main raw material and phenolic resin, asphalt powder or other organic substance as binder. The magnesite, olivine, calcite or limestone is crushed and sieved to the required grain size, then evenly mixed with the aluminium scruff ash and the binder based on parts by weight and finally bagged. The anti-penetration tundish dry liner has the advantages of: high strength subsequent to tundish heating and greatly reducing the possibility of tundish collapse after the heating; imparting excellent performance of resisting the penetration and erosion of slag to the material; not only effectively solving the problems about land occupancy and environmental pollution caused by the emission of non-ferrous melting waste, but also lowering the cost of the raw material for the anti-penetration tundish dry liner and remarkably enhancing performance price ratio.

A particle for treatment and repair of soil contamination is mainly composed of potassium ferrate and an inorganic cementitious material. The inorganic cementitious material is a powdery air-hardening or hydraulicity inorganic cementitious material. The potassium ferrate and the inorganic cementitious material are mixed according to the mass fraction of 1:5-50. After mixing is carried out, the particle with the particle diameter ranging from 2 mm to 5 mm is formed by means of vibration of a vibration screen, the particle is wrapped by a water-soluble film, and the water-soluble film is heated to be shrunk and then is closely attached to the outer surface of the particle. Also disclosed is a method for repairing soil by using the particle. When the particle is mixed with an ozone water solution is adopted.

The soil contamination detector and detection method are provided, the detector and the detection method can significantly simplify investigation and analysis of a contaminant without use of any large analyzer like a gas chromatograph. The soil contamination detector comprises a sensor (10) and a control mechanism (12). The sensor (10) is disposed in a region (4) as a contamination investigation object, for detecting odor (S) of a substance (M) contaminating soil (G). The control mechanism (12) compares the concentration (D) of the contaminant (M) detected by the sensor (10) with the tolerance limit concentration (Pd) of the contaminant (M) to determine the contamination.

The invention relates to a Brassica juncea var. integrifolia pickling production process, and solves the technical problems of complex process and easy soil contamination in existing Brassica juncea var. integrifolia pickling. The method includes: A. raw material pretreatment; B. pickling: stacking up Brassica juncea var. integrifolia in a pickling bag, scattering a mixed pickling material once stacking a layer of spreaded shrivelled Brassica juncea var. integrifolia, maintaining the spreaded shrivelled Brassica juncea var. integrifolia and the mixed pickling material in a weight ratio of 100:10-20, with the mixed pickling material comprising salt and turmeric powder in a weight ratio of 100:3-8; C. cleaning, cutting and squeezing; and D. flavoring and packaging. The Brassica juncea var. integrifolia pickling production process has the advantages that: the pickling process is simple, Brassica juncea var. integrifolia and a pickling pool are not in direct contact, the bittern produced in pickling cannot cause pollution to the soil environment, impurities are also hard to enter the pickled Brassica juncea var. integrifolia, so that cleaning of the pickled Brassica juncea var. integrifolia can be more convenient, and in the pickling process, the Brassica juncea var. integrifolia is difficult to rot and deteriorate, the nitrite content is low, and the pickled Brassica juncea var. integrifolia has good taste and high health care function.

Provided are: an insect repellent that has high repelling effect on harmful insects and excellent durability but yet shows lower toxicity to humans, animals, agricultural crops, etc., causes no soil contamination and can be easily used; and an insect repelling method. As active ingredients, at least one compound selected from among cyclic monoterpene alcohols and/or at least one compound selected from among cyclic monoterpene ketones are combined with at least one compound selected from among cyclic sesquiterpenes. To these active ingredients that are either used as such or impregnated into or mixed with an appropriate carrier, additive(s) are optionally added. The thus obtained mixture is formulated into a repellent in the form of a solid preparation, oil solution (liquid preparation), emulsion, wettable powder, paste, gel, aerosol, microcapsules, etc. and used by any means selected from among spraying, scattering, application, volatilization and fumigation.