255 results about "Lead pollution" patented technology

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 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 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 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 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 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 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 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 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.