256 results about "Lead pollution" patented technology

The invention discloses leadless radiation-proof organic glass and a preparation method of the leadless radiation-proof organic glass, wherein the organic glass is obtained by the steps of dissolving organic rare-earth salt into octanoic acid and propylene glycol, and then performing copolymerization with methyl methacrylate and a plasticizer under the action of an initiator. The organic glass prepared by the method not only keeps good light transmission, but also effectively reduces radiation and avoids lead pollution.

The present invention belongs to the field of metal material producing technology, and the easy-to-cut brass alloy contains Cu 80-84 wt%, Si 2.5-5.0 wt%, As 0.02-0.10 wt%, except Zn and 0.05 wt% below impurity. It may be used in replacing widely applied corresponding lead brass alloy to avoid lead pollution while ensuring excellent cutting performance, mechanism performance and conducting performance.

The invention discloses a curing agent for stabilizing a heavy metal lead pollution area containing organic matter. The curing agent is composed of the following components including, by weight, 33%-40% of phosphate, 33%-40% of graining blast furnace slag and 20%-34% of magnesium oxide. The curing agent can be used during in-situ processing of the heavy metal pollution area containing organic matter pollution and is remarkable in curing effects, pH value of the pollution area is low after treatment by the curing agent, and corrosivity is small. Besides, the pollution area has high strength after treatment and can be directly used as a shallow-layer foundation, and the curing agent is environment-friendly and low in cost simultaneously.

The invention relates to a strengthening measure for repairing the polluted soil plant, in particular to a method for combined repairing the soil polluted by heavy mental lead. The method is that the Petunia is planted on the soil which contains the polluted lead. When the Petunia becomes mature, mixed chelating agent is added to the soil. The mature Petunia as a whole are removed or grained after the soil balances for 10 to 15 days, thus achieving the purpose that the Petunia repairs the soil polluted by the lead. The added quantity of the mixed chelating agent is 7.5mmol / kg soil. The strengthening measure adds the mixed chelating agent when maturing to strengthen the total amount of the lead which is richly collected by the Petunia above the soil, and to grain the Petunia above the soil to realize the purpose of treating the soil polluted by the lead which is characterized by high efficiency of repairing, strong feasibility, greatly reduce the environmental risk and harm to the human health, etc.

The invention discloses the field of a heavy metal detection technology, and relates to a device and a method for rapidly detecting heavy metal lead pollution in soil or water. The device concretely comprises a black box module, a microcomputer module, a power module and a display module, wherein the block box module, the display module and the power module are respectively connected with the microcomputer module; the black box module comprises a black box, a fixed black box groove, a light source, an optical filter, an optical filter rack, a cuvette, a groove and a photoelectric detection chip; the cuvette is arranged in the middle of the black box; the light source and the optical filter are arranged at the left side of the black box; the photoelectric detection chip is arranged at the right side of the black box correspondingly to the light source; the content of heavy metal lead in soil or water environments is inverted by visible light of a colorimetric solution to be detected and a near infrared transmittance spectrum. The device and the method are capable of rapidly and accurately measuring the heavy metal lead pollution in the soil or water environments, so that the sufficient basis is provided for the detection on the soil or water environments.

The invention discloses lead-free low expansion coefficient glass powder for TFT-LCD sealing and a preparation method thereof. The lead-free low expansion coefficient glass for TFT-LCD sealing comprises 85-95 wt% of base glass and 5-15 wt% of filling materials, wherein the filling materials comprises beta-eucryptite microcrystalline glass having the expansion coefficient of -8.4*10<-7> / DEG C--6.2*10<-7> / DEG C. The glass contains no lead and is green and environmentally friendly, can be used for replacing leaded glass to eliminate the lead pollution to the environment, and has the advantages of excellent chemical stability, simple preparation technology, and low cost. Compared with other lead-free sealing glass powder, under the glass transition temperature of 440-480 DEG C, the softening temperature of 480-510 DEG C and the sealing temperature of lower than 600 DEG C, the glass powder disclosed herein has lower expansion coefficient which can be adjustable in a range of (40-60)*10<-7> / DEG C, and can satisfy the sealing requirements of TFT-LCD film transistor LCDs.

The invention discloses a plant restoring method of lead polluted soil, which comprises the following steps: planting butterflybush flower in the soil polluted by lead through direct transplanting or sowing pattern, controlling the soil acidity at neutral or acidness, harvesting periodically or according to lead content or growing height, remaining certain segment of sprout, disposing the harvested material at special place.

The invention discloses an oxalic acid penicillium strain NJDL-03 and application thereof. The strain NJDL-03 belongs to oxalic acid penicillium and is preserved in General Microorganism Center of China Committee for Culture Collection of Microorganisms on eighth, July, 2015, and the strain preservation number is CGMCC No. 11061. By means of the oxalic acid penicillium strain NJDL-03, solubility of hydroxyapatite can be remarkably improved, a large number of phosphate ions (PO<4><3->) are released out, hydroxyapatite lead [pb<10>(PO<4>)<6>(OH)<2>] which is quite prone to precipitating and fairly stable is generated through Pb<2+> in a precipitation environment, effectiveness of lead in the environment is lowered, and thereby the environment polluted by lead is restored. Oxalic acid penicillium fertilizer prepared through solid fermentation of the strain NJDL-03 is remarkable in application effects of improving solubility of hydroxylapatite, restoring lead pollution of soil, raising the utilization rate of calcareous soil phosphorus and promoting crop growth.

The invention relates to an unleaded Cu-based sliding bearing material and a preparation method thereof and the invention has the characteristics that: the material is composed of nickel, tin, zinc, iron, graphite, bismuth, copper and assistants, the substrate of the material is unleaded copper alloy, and the antifriction and antisticking constituent element is bismuth and graphite. The Cu-based bearing material features high intensity, and good antifriction and antisticking, thus realizing an unleaded Cu-based bearing material. The lead is cancelled in an original bearing material with lead and copper, and a synergistic effect of bismuth and graphite can replace the use of lead, thus completely overcoming the defect of lead pollution; moreover, the service performance of the bearing remains nearly the same, therefore the unleaded Cu-based sliding bearing material can completely replace the bearing material with lead and copper. The material of the invention can be applied in food machinery, drugs machinery, construction machinery, automobile and other products, and has advantages of good antifriction and antisticking, good heat dissipation effect, oxidation resistance and corrosive resistance.

The invention relates to a low temperature lead-free vitreous enamel component and the preparation. The component includes (a) basic glaze: 25-40 portions of SiO2, 17-30 portions of TiO2, 15-25 potions of Na2O, 5-20 portions of K2O. In addition, 0.1-0.5 portions Sb2O3, 0.1-3 portions of Li2O, 0.1-0.5 portions of ZrO2 and 5-15 portions of V2O5 are induced. The preparation includes: firstly, the components are weighted according to a glaze formula and melted in a high temperature furnace after being mixed. The melting temperature is 1250-1350 degree Celsius, and the melting time is 60 plus or minus 5min. materials coming out from the furnace when the melting is finished are directly poured in water for the quenching; secondly, the melted basic glaze materials are added with mill addition in proportion and water, and are milled in a planetary ball mill for 60-70min to be 200 orders; thirdly, slurry after ball milling is evenly distributed on a clean steel plate covered with aluminum and zinc and is burned for 2-3min at about 550-580 degree Celsius. The invention has the advantages of lead pollution-free, good adherence, uneasy abscission of enamel, gloss surface, simple preparation technology, low cost and easy expansion.

The invention relates to a soil conditioner for reducing the cadmium and lead pollution to crops, comprising inorganic components and organic components, wherein the effective components of the inorganic components are Ca(OH)2 and Na2SiO7 or mixtures of the Ca(OH)2 and the Na2SiO7; and the organic components include rice straws and tephrosia caudida casts or mixtures of the rice straws and the tephrosia caudida casts. The soil conditioner is used before the crops are cultivated; the inorganic components are prepared into agricultural-grade powder and 0.5-4 g of the inorganic components is used for one kilogram of wind drying soil; and the grain diameter of the crushed organic components is less than 1 cm and 5-40 g of the organic components is used for one kilogram of wind drying soil. The soil conditioner effectively reduces the biological effectiveness of heavy metal, the absorption of cadmium and lead by the crops and the heavy metal pollution to the crops and especially leafy vegetables without reducing the production property of the corps.

The invention relates to 100# lead-free aviation gasoline and a preparation method thereof. The 100# lead-free aviation gasoline comprises, by volume, 10-18% of industrial isopentane, 1-11% of light alkylated oil, 45-55% of industrial isooctane, 15-22% of toluene, 0-4% of m-xylene, 5-11% of cumene, 1.5-5.5% of aniline, 0.5-3.5% of N-methyl aniline and 0-3% of m-toluidine. The components are blended to form the finished product. Compared with the prior art, the 100# lead-free aviation gasoline does not contain lead and solves the problem of lead pollution of aviation gasoline. Through the optimized combination of the components, the 100# lead-free aviation gasoline quality is high and the 100# lead-free aviation gasoline satisfies the quality index requirements. The 100# lead-free aviation gasoline has a high economic value. The 100# lead-free aviation gasoline blending process is simple and is conducive to industrial production.

The invention discloses a modified graphene oxide and belongs to the technical field of water purification and graphene synthesis. The modified graphene oxide is prepared according to a preparation method which comprises the following steps: taking organic silicon compound; dissolving the organic silicon compound in a DMF (Dimethyl Formamide) solvent and then mixing with graphite oxide; ultrasonically treating the solution for 40 minutes, and then volatilizing the solvent while magnetically stirring; drying for 3 hours in an oven at 100-150 DEG C; drying for 2 hours in vacuum, thereby obtaining the modified graphite oxide; taking the modified graphite oxide, adding water, and then ultrasonically treating for 10-30 minutes, thereby obtaining an aqueous solution of the modified graphene oxide, wherein the aqueous solution is a uniformly dispersed brown solution; and after drying the aqueous solution, obtaining the modified graphene oxide. The modified graphene oxide provided by the invention is capable of adsorbing lead ions in water; the adsorbing efficiency is high; the usage of the adsorbent is less; the modified graphene oxide is environment-friendly; the operation is quick and convenient; and the problem of lead pollution in water is solved.

The invention relates to a glass composite for back surface field aluminum paste of a solar battery, which is Bi-Si-B system glass of non-lead systems and comprises Bi2O3, SiO2, Al2O3, ZnO, B2O3 and CaO, and a modified additive comprises TiO2, ZrO2, V2O5, CaF, etc. The invention also relates to a method for preparing the glass composite for the back surface field aluminum paste of the solar battery. In the technical scheme of the invention, the provided glass composite for the back surface field aluminum paste of the solar battery utilizes the Bi-Si-B system glass of non-lead systems, thereby eliminating lead pollution in the glass composite, meanwhile, the glass composite has low-melting property equivalent to that of lead glass and good immersion property to silicon slices and aluminite powder, so that the prepared back surface field aluminum paste can form excellent ohmic contact with the silicon slices, has good performances of high adhesion force, low wrapping of battery plates and high battery conversion efficiency.

The method of treating lead contaminated soil with bone charcoal is to use bone charcoal with wide source and low cost in chemical reaction with lead in soil to form stable compound, so as to lower biologically effective lead content in soil, reduce the absorption and accumulation of plant root system and treat lead contamination of soil. Specifically, bone charcoal is crushed into powder of 300-350 mesh and buried into soil in the amount of 2-16 g each kg soil.

The invention provides a lead-free perovskite film and a preparation method and an application thereof. The preparation method of the lead-free perovskite film comprises the steps of: weighing SnX2 and CH3NH3X as two evaporator sources, wherein the X is C1, Br or I; putting the two evaporator sources and a substrate into a cavity of a coevaporation device, and vacuumizing the cavity; heating SnX2 so as to enable SnX2 to evaporate and be deposited on the substrate; stopping heating SnX2, heating CH3NH3X so as to enable CH3NH3X to evaporate and be deposited on the substrate, and accomplishing a circulation of the alternate evaporation of SnX2 and CH3NH3X; accomplishing a second circulation of the alternate evaporation of SnX2 and CH3NH3X; and finally, taking the substrate out and performing an annealing process. According to the invention, the perovskite film is prepared by the organic and inorganic alternate coevaporation method, the film with high quality is obtained, the problem of lead pollution is solved, and the industrial development is realized.

The invention discloses a method for analyzing a lead pollution source in a water body deposit, wherein the method belongs to the field of environmental geology. The method comprises the steps of calculating a geochemistry baseline model, calculating an artificial contributed lead concentration, performing lead isotopc analysis based on ICP-MS, performing ratio analysis and executing a tracing process through combining two methods. The method breaks through a traditional tracing process and returns to tracing essence. The artificial contributed lead concentration which is screened by the geochemistry baseline is used for establishing correlation with a lead isotope ratio. Furthermore through the artificial contribution rate which is acquired through a geochemistry baseline equation and a lead isotope ratio, the contribution rates of lead from different sources in the deposit are calculated. The method overcomes defects such as large data volume, inaccurate traceability and incapabilityof performing accurate quantification in traditional heavy metal source analysis. The method is a combined lead isotope traceability method which has advantages of simple flow, easy operation and high quantification accuracy. Furthermore the method has wide application prospect for source analysis of the deposit sample in a complicated environment.

The invention relates to a high-strength easy-cutting aluminium alloy. The invention is characterized in that the aluminium alloy is an aluminium-base alloy, containing bismuth, tin, copper, silicon and chromium as alloying elements, and other unavoidable impurity elements. A product produced by the alloy has good easy-cutting capability, excellent mechanical property, excellent corrosion resistance and excellent solderability. The aluminium alloy has low production cost and is equivalent to the prior leady aluminium alloy, so the aluminium has competitive advantages in domestic and foreign markets; The aluminium alloy product can replace partial leady aluminium alloys, thereby not only facilitating the reclamation when the product is consumed completely so as to reduce lead pollution, but also facilitating the expansion of the application field of aluminium alloy products. The aluminium alloy also can replace partial leady easy-cutting aluminium alloys, such as 2011 or 6262 leady aluminium alloy and so on.

The invention discloses a magnetic carboxylation hollow microsphere soil restoration agent and a preparation method thereof. The method comprises the following steps of using improved Stober method for preparing single dispersion SiO2 microspheres; using a hydrothermal method for synthesizing Fe3O4@C hollow microspheres; using a dialysis method for synthesizing Fe3O4@C-COOH hollow microspheres. The invention also provides application of the magnetic carboxylation hollow microsphere soil restoration agent to lead pollution soil restoration. The improved Stober method, the hydrothermal method and the dialysis method are integrated; the synthesized carboxylation hollow microspheres have the unique core-sell structures; a great number of -COOH and -OH groups are coated on the surface; the advantages of great adsorption volume, high specificity and the like are realized; the adsorption volume on heavy metal lead in the soil is much higher than the adsorption volume of synthesis materials prepared a coprecipitation method, a micro emulsion method and a thermolysis method. The carboxylation hollow microsphere soil restoration agent prepared by the method also has a certain recovery performance and can be reused.

The invention relates to a novel electronic anti-counterfeiting system used for electric meter, comprising a management system, a data acquiring terminal and an E-sealing unit; wherein the management system is connected with the data acquiring terminal, the data acquiring terminal is communicated with the E-seal; the data acquiring terminal transmits a radio wave energy at specific frequency to the E-sealing unit, so as to drive the E-sealing circuit to output internal data while the data acquiring terminal receives and decodes data in sequence and sends the data to the management system for corresponding processing; and half-duplex communication mode is adopted for information exchange between the data acquiring terminal and the E-sealing unit, and meanwhile the data acquiring terminal provides energy and time sequence to the passive E-sealing unit by coupling. The invention has the beneficial effects of small volume, light weight, omniseal, dust prevention, watertightness, corrosion resistance, vibration resistance, impact resistance, resistance to high voltage interference, favourable weatherability, durability, no lead pollution problem, convenient and rapid use, optional implementation before and after sealing and no influence on sealing effect.

The invention discloses application of malva to remediation of cadmium and lead pollution of mine soil and sludge, which is characterized by planting malva in the mine soil or sludge polluted by heavy metals. The invention has the following beneficial effects: the malva is planted in the mine soil or sludge by utilizing the enrichment characteristics of malva toward cadmium, lead and other heavy metals, and can absorb the accumulated heavy metals such as cadmium, lead, etc, and most malva is transported above the ground to achieve the aim of remediating heavy metal pollution of mine soil and sludge; the malva dispenses with special management in the growth process, thus the cost is lower and the operability is strong; and meanwhile, the invention develops new plant resource varieties for remediation of plants polluted by heavy metals in the mine oil and sludge and brings new progress and development space for deep development of plant remediation technology.

The invention discloses a lead removing composite agent for waste red copper, comprising the components of: 20-40 wt% of quartz sand, 20-40 wt% of sodium borate, 10-30 wt% of calcium salt, 5-10 wt% of sodium chloride and 5-20 wt% of coal ash. The calcium salt can be one or two of calcium carbonate and calcium fluoride. Compounds of the lead removing composite agent are mutually supported and complemented so that the lead removing effect is stable. The slag generated by the lead removing composite agent provided by the invention is light and fluffy, and the operation is simple. The copper content of the slag is below 10 %. The exhaust of lead in smoke is reduced so as not to form lead pollution to the air. Furthermore, both manufacture and application of the composite agent accord with environment-friendly requirements, the application amount is less, and the composite agent is safe and reliable.

The invention relates to an engineering plastic process for producing nylon-11 by caster oil and particularly relates to a method for cracking the caster oil to produce undecylenic acid, which belongs to the process flow and solves the existing problems of lead pollution and easy coking in the technology that the caster oil is cracked by the technique of cauldron-typed lead melter. The method is as follows: the caster oil and a catalyst of benzoyl peroxide solution are mixed and preheated to 150-200 DEG C, the quality proportion of which is 1000:3-7:1100-1300 with over heated water vapor of 500-600 DEG C, which enters into a loading tube from the mouth of the loading tube, enters into the top of the cracking stove body from the outlet of the loading tube, and enters into a reacting space along a screw panel; the cracking stove body at the upper part of a tower-typed cracking stove is heated to 500-600 DEG C by an electric heater to crack to produce undecylenic acid and heptaldehyde products. The engineering plastic process for producing nylon-11 by caster oil has the advantages of permanent reaction, strongly continuous operability, ,which is suitable for the production of industrialized settings and can improve the operating environment, can overcome the hurt to body and spirit of the operator by the lead pollution, and has low possibilities of coking, high yield and simple setting producing technologies.

The invention discloses a method for preparing lead chloride and calcium sulfate from lead plasters of waste lead accumulators by a wet process. The lead plasters of the waste lead accumulators are taken as a raw material, and the method comprises the following steps of: leaching the lead plasters in an HCl-NaCl system; cooling the leach solution to separate out crystals; and separating, washing and drying. The method is characterized in that: a sulfur resource is recovered from cooling crystallization filtrate, and the cooling crystallization filtrate is in a closed cycle; the cooling crystallization filtrate is added with calcium chloride to form a calcium sulfate precipitate; the calcium sulfate precipitate is separated, washed and dried to form a calcium sulfate product; and the filtrate is used for preparing saturated NaCl solution which returns to the leaching process. Through the method, the lead chloride is obtained, and the industrial gypsum with the purity of over 97 percent is also obtained, so the sulfur resource is recycled, the cooling crystallization filtrate is circularly used, the lead recovery rate is over 96 percent after four times of circulation, and the waste of the lead resource and the lead pollution are avoided.

The invention belongs to the technical field of mechanical manufacturing, and relates to a method for extrusion molding of lead-free specially shaped copper tubes. In the method, a mixture of potassium nitrate, animal fat and calcium stearate in a ratio is used as a molding medium to mold the specially shaped copper tubes, in particular, the copper tubes of a certain size are deburred, and the mixture of the potassium nitrate, animal fat and calcium stearate is fully filled in blanks of the copper tubes to obtain the filled type copper tubes; the blanks of the copper tubes are placed in an extrusion mold, the uniform and equivalent pressure is applied onto both sides of the copper tubes by extrusion mechanics, so that the blanks of the copper tubes are processed into the specially shaped copper tube pieces; after being taken down, the workpieces are placed in hot water to thaw the potassium nitrate, and then the filling materials are removed to obtain the finished products. The method has the advantages of simple process, easy operation, no lead pollution, convenient and thorough removal of the extrusion medium of the potassium nitrate and the mixture of the potassium nitrate, the realization of recycling potassium nitrate and the mixture of the potassium nitrate and low production cost.

The invention provides a composite fertilizer for repairing lead-polluted soil, which includes nitrogen, phosphorus and potassium nutrients and the following components, in proper ratio: agricultural rare earth nitrates, waste catalyst, chitosan, humic acid mineral powder, sepiolite, plant ash, kaolin and zeolite. When the fertilizer is applied in lead-polluted soil, lead in soil is effectively passivated and immobilized under a synergistic effect of the components above, and meanwhile, the polluted soil is effectively repaired, so that activity of lead in soil is significantly reduced and adsorption of crops to lead is effectively reduced, thereby reducing lead content in crops significantly. The composite fertilizer is excellent in stability and environment-friendly property, is free of secondary pollution, is low in cost and is easy to popularize in large scale. When the fertilizer is applied in lead-polluted soil, the use quantity is only 10-200 kg / hm<2>. The composite fertilizer can significantly reduce the lead content in crops, so that the lead content in crops reaches national food safety standard.

The invention relates to a lead feeding system for a lead-acid storage battery and a control method of the lead feeding system. The lead feeding system comprises a controller, a carrying robot, a PLC, a clamp, a vacuum pressure switch, a material taking stroke switch, a pneumatic element, an industrial camera, a feeding stroke switch and a conveying chain. The control method includes the steps of automatic material taking and automatic material feeding. According to the lead feeding system and the control method, the processes of automatic material taking and feeding control of the lead feeding system for the lead-acid storage battery are controlled through the PLC, system running is stable and reliable, and the working frequency is within a controllable range; lead pig images are collected and processed through the industrial camera, and the carrying robot takes materials rapidly and flexibly; through process treatment of the PLC, the lead feeding system for the lead-acid storage battery and a lead-acid storage battery production system achieve data signal joining; and the carrying robot conducts material taking and material taking on lead pigs through the clamp, and lead pollution and poisoning are avoided.

The invention discloses a leadless aluminium enamel glaze of SiO2-B2O3-TiO2-R2O system for use on pure aluminum plate or aluminum alloy plate, which has the advantages of no lead pollution to environment, good acid-resisting chemical stability, fine adhesion property with base material, thus is suitable of surface decoration and protection of various colors on pure aluminium or aluminium alloys.

The invention discloses a high-precision detonator blasting system based on an electronic delay body. The high-precision detonator blasting system comprises a detonating primer and an electronic delay body detonator which are connected through a power line. In order to keep the simplicity and reliability of the blasting system, a communication protocol method is not adopted between the detonating primer and the electronic delay body detonator to control the detonation of the electronic delay body detonator, and the detonation is realized through state recognition only. By adoption of the electronic delay body, a chemical delay agent is replaced, and the chemical agent pollution in the production process and the lead pollution in the blasting site are eliminated; by adoption of an open source commerce (OSC) oscillator, the precision of 99 percent can be achieved by utilizing laser correction; and due to the mode of reducing the voltage of the power line, the state recognition is realized, a fixed time period T is kept, at the moment that the fixed time period T is kept, each electronic detonator is started and timed, and the high-precision delay of the system is guaranteed.

The present invention discloses a method for reducing the pollution of heavy metals of cadmium and lead to the cabbage heart. The method comprises the steps of firstly filtering the cabbage heart breed with low accumulation amount of cadmium or lead, and then filtering the cabbage heart breed with low accumulation amount of cadmium and lead from the former cabbage heart breed. The method of the invention can obtain the cabbage heart breed with the Cd and Pb accumulation amount of edible part in the tolerance range of food hygiene standard through two steps of filtering. The harm risk of Cd and Pb in the soil and water environment to the health of human body through cabbage heart is reduced. Furthermore the method of the invention has the advantages of short required time and low cost. The method of the invention can settle the Cd and Pb pollution problem of farmland soil of our country directly, quickly and effectively. The method of the invention also has the advantages of strong pertinence, simple operation, low cost, excellent safety, and suitability for large-area application generalization.