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4325 results about "Cadmium" patented technology
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Cadmium is a chemical element with the symbol Cd and atomic number 48. This soft, silvery-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Like zinc, it demonstrates oxidation state +2 in most of its compounds, and like mercury, it has a lower melting point than the transition metals in groups 3 through 11. Cadmium and its congeners in group 12 are often not considered transition metals, in that they do not have partly filled d or f electron shells in the elemental or common oxidation states. The average concentration of cadmium in Earth's crust is between 0.1 and 0.5 parts per million (ppm). It was discovered in 1817 simultaneously by Stromeyer and Hermann, both in Germany, as an impurity in zinc carbonate.
Thin-film solar cells
InactiveUS6974976B2Increase reflectionInhibition formationFinal product manufactureVacuum evaporation coatingIndiumElectrical battery
Owner:BEIJING APOLLO DING RONG SOLAR TECH
Synthesis of colloidal nanocrystals
InactiveUS6872249B2High crystallinityGood monodispersityFrom gel stateMaterial nanotechnologyPresent methodSulfur
A method of synthesizing colloidal nanocrystals is disclosed using metal oxides or metal salts as a precursor. The metal oxides or metal salts are combined with a ligand and then heated in combination with a coordinating solvent. Upon heating, the metal oxides or salts are converted to stable soluble metal complexes. The metal complexes are formed by cationic species combining with the ligands and / or with the coordinating solvent. Finally, an elemental chalcogenic precursor, for example, Se, Te, or S, is introduced into the soluble metal complex to complete the formation of the nanocrystals at a controllable rate. High-quality CdSe, CdTe, and CdS nanocrystals are produced when CdO is used as the cadmium precursor. With the present method, the size, size distribution, and shape (dots or rods) of the resulting nanocrystals can be controlled during growth. For example, the resulting nanocrystals are nearly monodisperse without any size separation. Further, the method represents a major step towards a green chemistry approach for synthesizing high-quality semiconductor nanocrystals.
Owner:THE BOARD OF TRUSTEES OF THE UNIV OF ARKANSAS
High performance energy storage devices
ActiveUS20070104981A1Avoid gasLower internal resistanceHybrid capacitor electrolytesCapacitor and primary/secondary cellsLead dioxideBusbar
A lead-acid battery comprising: at least one lead-based negative electrode; at least one lead dioxide-based positive electrode; at least one capacitor electrode; and electrolyte in contact with the electrodes; wherein a battery part is formed by the lead based negative electrode and the lead dioxide-based positive electrode; and an asymmetric capacitor part is formed by the capacitor electrode and one electrode selected from the lead based negative electrode and the lead-dioxide based positive electrode; and wherein all negative electrodes are connected to a negative busbar, and all positive electrodes are connected to a positive busbar. The capacitor electrode may be a capacitor negative electrode comprising carbon and an additive mixture selected from oxides, hydroxides or sulfates of lead, zinc, cadmium, silver and bismuth, or a capacitor negative electrode comprising carbon, red lead, antimony in oxide, hydroxide or sulfate form, and optionally other additives. The capacitor electrode may be used in asymmetric capacitors and batteries of other types.
Owner:COMMONWEALTH SCI & IND RES ORG
Articles with electroplated zinc-nickel ternary and higher alloys, electroplating baths, processes and systems for electroplating such alloys
An electroplating bath, a system, a process for, and the article obtained from, depositing a zinc-nickel ternary or higher alloy, a) zinc ions; b) nickel ions; and c) one or more ionic species selected from ions of Te+4, Bi+3 and Sb+3, and in some embodiments, further including one or more additional ionic species selected from ions of Bi+3, Sb+3, Ag+1, Cd+2, Co+2, Cr+3, Cu+2, Fe+2, In+3, Mn+2, Mo+6, P+3, Sn+2 and W+6. In some embodiments, the system includes a divider forming a cathodic chamber and an anodic chamber, with the electroplating bath in the cathodic chamber only. In various embodiments, the zinc-nickel ternary and higher alloys may provide improved properties to the conductive substrates upon which the alloys are deposited.
Owner:ATOTECH DEUT GMBH
Iron-based bio-char material, preparation process thereof, and application thereof in soil pollution treatment
ActiveCN104388094AImprove performanceReduced bioavailabilityTransportation and packagingContaminated soil reclamationCarbonizationSoil heavy metals
Owner:GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
Method and Structure for Integrated Solar Cell LCD Panel
InactiveUS20070102035A1Improve fill rateIncrease cell areaPV power plantsPhotovoltaic energy generationEngineeringSolar cell
The present invention relates to a method and device for integrating solar cell on LCD panels for photovoltaic electricity generation for portable electronic devices. According to one embodiment of the present invention, the black matrix region on the color filter substrate in a LCD panel is replaced by a solar cell region. A lens array substrate is coupled between the light source layer and the TFT to focus the backlight to increase the solar cell layer area while maintaining high fill ratio of the LCD pixels. The solar cell material is selected from at least silicon, a single crystal silicon, poly-crystalline silicon, amorphous silicon, gallium arsenide, cadmium telluride, copper indium diselenide, organic / inorganic, or hybrid cells. The substrate material is selected from glass, metal, plastic or polymer.
Owner:XIAI CHARLES YANG
Metal heavy absorbent and preparation method and use thereof
InactiveCN102389776AEasy to operateImprove efficiencyOther chemical processesWaste water treatment from animal husbandryActive agentKaolin clay
The invention discloses a heavy metal absorbent and a preparation method and use thereof. The heavy metal absorbent is prepared by using an inorganic mineral modified by a surfactant as a carrier and loading organic complexing agent on the carrier, wherein the inorganic mineral is bentonite, kaolin, kieselguhr, zeolite, aluminum oxide or iron oxide; the surfactant is cationic surfactant or nonionic surfactant; and the organic complexing agent is a compound containing a sulfydryl and an amino. The heavy metal absorbent has the advantages of stable performance, environment friendliness, high absorption capacity, high selectivity, convenient post-recovery treatment and the like. The absorption capacities of cadmium, mercury lead and other heavy metals all exceed 100mg / g, and the heavy metal absorbent can achieve good treatment effect in treatment of water and soil environments polluted by heavy metals.
Owner:上海伊克诺环境科技有限公司
In-situ restoration method for heavy metal polluted soil
The invention discloses an in-situ restoration method for heavy metal polluted soil, which comprises the following steps of: uniformly mixing submicron or nano iron, coal ash, a magnesium-containing preparation and bentonite in proportion by weight of (5-25): (40-50): (1-10): (15-50) to obtain a heavy metal polluted soil restoration agent, after applying the heavy metal polluted soil restoration agent on the surface of the heavy metal polluted soil at the thickness of 1-4cm, uniformly mixing a 20cm thick polluted soil surface layer with the applied restoration agent by plowing, and after 3-6 months, reducing heavy metals such as cadmium, chromium, mercury, lead, arsenic, nickel, zinc, copper, magnesium and vanadium in the heavy metal polluted soil into low-valence immobilized heavy metals to lose biological effectiveness and realize the in-situ restoration for the heavy metal polluted soil. However, the environmental quality of restored soil satisfies the requirements of second-level standard values in Environmental Quality Standards for Soils (GB 15618-1995) in China.
Owner:刘阳生
Stabilized curing agent for heavy metal contaminated soil or solid waste treatment and treatment method
ActiveCN104312591AAchieve adsorptionRealize functionContaminated soil reclamationBuilding constructionsTreatment effectDissolution
The invention discloses a stabilized curing agent for heavy metal contaminated soil or solid waste treatment and a treatment method. The stabilized curing agent comprises the following components in parts by weight: 5 to 10 parts of a magnesium-based compound, 1 to 5 parts of a sulfur-based compound and 1 to 3 parts of an activated silicon-based compound. The treatment method comprises the following steps of sampling inspection, experimental determination of adding proportion, mixing, backfill maintenance, sealing up for safekeeping and the like. The stabilized curing agent disclosed by the invention has an efficient long-term stabilizing effect on various heavy metals such as arsenic, mercury, hexavalent chromium, lead, cadmium, nickel, tin and cyanide, the repeated acid and alkali leaching experiments prove that the stabilized and cured harmful heavy metals cannot be dissolved out again, and the defects that in the traditional technology, the treatment effect and treatment agents are greatly affected by the environment, the long-term efficacy of harmless stabilization is poor, the medicament adding amount is difficult to control and the re-dissolution of harmful heavy metals is easily caused by the high alkalinity of cement solidification and the like are overcome.
Owner:GUIZHOU MEIRUITE ENVIRONMENTAL PROTECTION TECH
High temperature resistant environment-protective polychloroethylene material for electric wire and cable
InactiveCN101412834AImprove mechanical propertiesImprove insulation performancePlastic/resin/waxes insulatorsInsulated cablesPolyesterPolyvinyl chloride
The invention provides a high-temperature resistant environment-friendly polyvinyl chloride material for wires and cables. A raw material formulation mainly comprises the following materials in weight portion: 80 to 120 portions of loose-type polyvinyl chloride resin, 20 to 55 portions of tetraoctyl pyromellitate, 5 to 35 portions of polyester plasticizer and 12 to 18 portions of calcium-zinc stabilizer, wherein the polymerization degree of the loose-type polyvinyl chloride resin is between 2,000 and 3,000; in the calcium-zinc stabilizer, the total content of lead, cadmium, mercury and hexavalent chromium is less than or equal to 10 ppm of the total weight of the calcium-zinc stabilizer; the polyester plasticizer is polypropylene-1, 2-glycol adipate or polypropylene-1, 3-butylene terephthalate; and the molecular weight of the polyester plasticizer is between 3,000 and 4,000. After the material is aged in a hot-air oven for 168 hours at 158 DEG C, the retention rate of tensile strength is up to 106 percent; the retention rate of elongation at break is 97 percent; and the material is good in mechanical physical properties and insulating property. Therefore, the material meets the temperature-resistant requirement on long-term operating temperature at 125 DEG C in UL1581.
Owner:中广核三角洲(江苏)塑化有限公司
Method for producing and restoring vegetables growing in the heavy metal mildly-polluted soil
ActiveCN101116865AReduce the effective content of heavy metalsDoes not destroy physical and chemical propertiesContaminated soil reclamationFertilising methodsSedum alfrediiElsholtzia splendens
The invention relates to a technique of remediation of slightly and medio- metal-contaminated vegetable soil with production. The specific steps are as follows: firstly, Sedum alfredii and Elsholtzia splendens are intercropped in vegetable soil contaminated by heavy metal such as cadmium, copper and zinc in spring with a with inter plant distance of ten to fifteen centimeters, row spacing of thirty centimeters; secondly, the Sedum alfredii is harvested periodically, a growth period of Sedum alfredii is three to four months during a first harvest, from then on, the Sedum alfredii is harvested every three months or when growing to a height of thirty to forty centimeters, stems of a height of two to three centimeters are left above the ground in harvest; the Elsholtzia splendens is harvested in October; thirdly, a cadmium-enriched rape is planted after the harvest of the Elsholtzia splendens with the spacing in the row of fifteen to twenty centimeters and is harvested in April of the next year; fourthly, a cucumber is planted after the harvest of the rape with the spacing in the row of twenty to twenty-five centimeters, a cabbage is planted after the harvest of the cucumber in September, the Elsholtzia splendens is planted after the harvest of the cabbage, then a restoring period is completed. Adopting a super accumulator plant for absorbing a plurality of heavy metal from the soil, the invention achieves reducing the heavy metal content in the vegetables and guaranteeing the safety of the farm produce.
Owner:ZHEJIANG UNIV
Bioremediation method for soil polluted by heavy metals
ActiveCN102553904AComposite treatment effect is goodConsiderable enrichmentContaminated soil reclamationMicroorganismPollution soil
The invention discloses a bioremediation method for soil polluted by heavy metals. The bioremediation method comprises the following steps of: adding earthworm feeds into the soil polluted by the heavy metals, turning the soil, uniformly mixing, and putting earthworms into the soil and cultivating the earthworms; after the earthworms are cultivated for 28 to 35 days, collecting earthworm excrements in the upper layer soil, collecting adult earthworms by adopting a natural lighting method, and retaining young earthworms and earthworm eggs in the soil; planting plants by adopting a hedge planting method, cradling the parts of the plants growing for 78 to 90 days, which are positioned above the ground, and removing the whole plants after the plants grow for another 50 to 70 days; collecting the adult earthworms and the earthworm excrements for 1 to 3 days by adopting an outdoor collection method every 28 to 35 days during planting of the plants; and after the whole plants are removed, collecting all the adult earthworms and the young earthworms by adopting the natural lighting method, and collecting the earthworm excrements and the earthworm eggs. The soil is subjected to remediationby combining animals, plants and microorganisms according to a proper remediation sequence and a remediation period, so that the bioremediation method is economic, environment-friendly, easy to operate, high in remediation efficiency and easy to popularize, and is particularly suitable for mild or moderate copper, cadmium and lead combined polluted soils.
Owner:浙江博世华环保科技有限公司
Thin film transistors using thin film semiconductor materials
The present invention generally comprises TFTs having semiconductor material comprising oxygen, nitrogen, and one or more element selected from the group consisting of zinc, tin, gallium, cadmium, and indium as the active channel. The semiconductor material may be used in bottom gate TFTs, top gate TFTs, and other types of TFTs. The TFTs may be patterned by etching to create both the channel and the metal electrodes. Then, the source-drain electrodes may be defined by dry etching using the semiconductor material as an etch stop layer. The active layer carrier concentration, mobility, and interface with other layers of the TFT can be tuned to predetermined values. The tuning may be accomplished by changing the nitrogen containing gas to oxygen containing gas flow ratio, annealing and / or plasma treating the deposited semiconductor film, or changing the concentration of aluminum doping.
Owner:APPLIED MATERIALS INC
Composite passivant for soil polluted by heavy metal and preparation method
ActiveCN102174325AImprove passivation abilityRaise the pHContaminated soil reclamationOrganic fertilisersSlagSoil heavy metals
The invention discloses a composite passivant for soil polluted by heavy metal and a preparation method thereof. The composite passivant is prepared by three raw materials of power plant slags, sepiolite mineral powder and calcined lime in proportion. The preparation method comprises the following steps: A. preparing the power plant slags; B. preparing the sepiolite mineral powder preparation; and C. evenly mixing the raw materials prepared by steps A and B with the calcined lime, wherein the mixture is the composite passivant. By utilizing the composite passivant, the contents of the effective constituents, such as silicon oxide, magnesium oxide, calcium oxide, ferric oxide and the like lowering the soil heavy metal activity is 78.2-90.6% which is calculated by the sum of SiO2, MgO, CaO, MnO2 and Fe2O3; the composite passivant can be widely used in various soils polluted by the heavy metal, especially the soil with visco-weight texture; and by using the composite passivant, the contents of cadmium and lead in a soil active state in the pollutant farmland are lowered by 15.9-48.4% and 26.2-56.4% respectively; the contents of the cadmium and the lead of agricultural products are lowered by 13.6-43.9% and 22.1-53.2% respectively; and the soil pH value is also improved by 0.21-0.46%. The composite passivant has various functions of passivating soil heavy metal, repairing acidification soil and improving the soil tilth and the like.
Owner:INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
Method for remediating cadmium contaminated soil of vegetable field in situ by compounding bio-charcoal and organic fertilizer
InactiveCN102553905APollution passivation repair effect is remarkableNot easy to decomposeContaminated soil reclamationBiocharContamination
The invention relates to a method for remediating cadmium contaminated soil of a vegetable field in situ by compounding bio-charcoal and an organic fertilizer. The method comprises the following steps of: applying a passivation material obtained by compounding the bio-charcoal and the organic fertilizer in a mass ratio of 1:1 to a surface layer of soil of a cadmium contaminated vegetable field, fully and uniformly mixing the passivation material and the soil in a plowing layer with the thickness of 0 to 20cm, judging the contamination level of the soil according to environmental quality standard for soils GB15618-1995, and ensuring that the application rate of the passivation material is not less than 0.5 percent of the weight of dry soil, namely 750kg / mu when the cadmium concentration of the soil is 1.0 to 2.9mg / kg. The invention has the advantages that: raw materials of the passivation material are wide in source and low in cost, the application method is simple and has a remarkable effect of remediating the cadmium in the soil in a passivation way, and the risk of secondary contamination is avoided; and the bio-charcoal is applied into the soil, so the passivation material has the effects of reducing the discharge of greenhouse gas of farmland ecosystems, increasing the content of organic carbon of the soil, improving soil structures and the like, and has huge popularization and application value.
Owner:AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
Method for cultivating low-cadmium-accumulation indica rice variety
ActiveCN106544357AAvoid safety hazardsPrecise and controllable mutation sitesNucleic acid vectorPlant peptidesTransgenesisMutant
The invention discloses a method for cultivating a low-cadmium-accumulation indica rice variety. The method includes the steps of cloning part of the CDS sequence of OsNramp5 of an indica rice acceptor material; using a CRISPR / Cas9 system to select a target sequence according to an exon sequence; building pCRISPR / Cas9 recombinant vectors; leading the pCRISPR / Cas9 recombinant vectors into rice calluses to obtain transgene seedlings; screening transgene positive plants; obtaining mutant plants; and conducting seed propagation of the mutant plants, and separating afunction mutants containing no transgenic ingredients from plant progenies. By means of the method, the cadmium absorption major gene OsNramp5 of indica rice is directionally knocked out through the CRISPR / Cas9 technology, and the indica rice material containing no transgenic ingredients, having no significantly variant comprehensive agronomic characters and achieving a low cadmium content in rice is directionally cultivated. The method has the advantages that targeting is efficient, the breeding period is short, cost is low and practicality is high.
Owner:HUNAN HYBRID RICE RES CENT
Lead-free and cadmium-free electrode silver slurry for piezoelectric ceramics and preparation method thereof
ActiveCN102751000AAchieve lead-freeImprove adhesionNon-conductive material with dispersed conductive materialCable/conductor manufactureAdhesion forceSlurry
The invention discloses a lead-free and cadmium-free electrode silver slurry for piezoelectric ceramics. The lead-free and cadmium-free electrode silver slurry for piezoelectric ceramics is prepared from the following raw materials in percentage by weight: 50 to 75 percent of conducting silver micro powder, 0.5 to 5 percent of inorganic additive, 1 to 15 percent of lead-free glass powder and 15 to 45 percent of organic carrier. The lead-free and cadmium-free electrode silver slurry is technologically advantaged in that a boron-bismuth-silicon-zinc-titanium glass system is designed, the traditional lead-containing glass can be completely substituted, a lead-free product is realized, the system glass can react with a piezoelectric ceramic substrate to form a firm interface between an electrode and the substrate, and the adhesion force of the interface is more than 15N / mm<2>.
Owner:HEFEI SHENGDA ELECTRONIC TECH IND CO LTD
Electronic Package Formed Using Low-Temperature Active Solder Including Indium, Bismuth, and/or Cadmium
InactiveUS20070228109A1Increase concentrationHigh-strength, high-thermal conductivity jointsCooking-vessel materialsExhaust apparatusIndiumNiobium
An active solder alloy, an electronic device package including the active solder alloy bonding an electronic device to a substrate, and a method of forming high-strength joints by soldering using the solder alloy. The alloy contains up to about 10% by weight of an element or a mixture of elements selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, or tantalum; between about 0.1 and 5% by weight of an element or a mixture of elements selected from the group of the lanthanides (rare earths); between about 0.01 and 1% by weight of gallium up to about 10% by weight of silver; up to about 2% by weight of magnesium; and a remainder consisting of tin, bismuth, indium, cadmium, or a mixture of two or more of these elements. The alloy enables low-temperature (less than about 180° C.) soldering within relatively narrow melting ranges (less than about 10° C.).
Owner:S BOND TECH
Nickel-zinc soft magnet ferrite material, inductor product and its producing method
InactiveCN1750182AIncrease inductanceImprove qualityInorganic material magnetismInductances/transformers/magnets manufactureSoft magnetInductor
This invention discloses a Ni-Zn soft magnetic ferrite material including a master composition: Fe2O3, NiO, CuO and ZnO, a first auxiliary composition: CO2O3 and / or MnO2, there is no oxide added with pb and Ge. This invention also discloses an inductor product with said material and a manufacturing method.
Owner:广东风华高新科技集团有限公司
Preparation method of active radical with surface-enhanced Raman scattering (SERS) effect
InactiveCN102759520AQuick checkIncrease surface areaRaman scatteringChemical vapor depositionCadmium Cation
The invention provides a preparation method of an active radical with a surface-enhanced Raman scattering (SERS) effect, belongs to the technical field of spectrum detection, and relates to the preparation technology of the SERS active radical, which is rapid, has high sensitivity and performs a low trace detection function. The preparation method is characterized in that firstly, a nano porous silicon columnar array with a large specific surface area is prepared by utilizing a hydrothermal etching technology; afterwards, a nanowire structure of an II-VI group compound semiconductor (such as zinc oxide, titanium dioxide, cadmium sulfide, cadmium selenide, cadmium telluride, and the like) by utilizing a chemical vapor deposition method; and finally, nano particles of precious metal (such as gold, silver, copper and the like) are finally prepared on the nanowire structure by using a chemical reduction method, so as to obtain an active radical material. The preparation method has a wide application prospect in the aspects of clinical biomolecular fast recognition, trace chemical substance detection, biological sample analysis, and the like. The preparation method has the advantages that the preparation process of each material is simple, the condition is mild and the repetition rate reaches 100 percent.
Owner:BEIJING UNIV OF CHEM TECH
Multilayer composite metal oxide catalyst and preparation method thereof
ActiveCN102247862AHigh reactivityHigh selectivityOrganic compound preparationCarbonyl compound preparationAlkaline earth metalCerium
The invention relates to a multilayer composite metal oxide catalyst. The multilayer composite metal oxide catalyst has the general formula as follows: Mo[a]Bi[b]Ni[c]Cs[d]Cu[e]Ti[f]A[g]B[h]C[i]O[j], wherein Mo is molybdenum, Bi is bismuth, Ni is nickel, Cs is cesium, Cu is copper, and Ti is titanium; A is at least one element selected from arsenic, tellurium, manganese, cerium, niobium, zirconium, rubidium, cadmium and germanium; B is at least one element selected from cobalt, boron, strontium, tantalum, alkali metal and alkaline earth metal; C is at least one element selected from vanadium, stannum, gallium, zinc, ferrum, tungsten and stibium; and O is oxygen. The composite metal oxide catalyst has a multilayer structure in which the concentrations of all the elements are reduced progressively from a matrix at the inner layer to the outer layer. The catalyst provided by the invention can effectively reduce the local heat accumulation of single pipe reactors and inhibit the formation of hot spots, and has the characteristics of high reactivity and selectivity and long service life.
Owner:PETROCHINA CO LTD
Preparation for thiol-functionalization MOFs material and application thereof in adsorption and removal of heavy metal ions in water
The invention relates to a preparation method for a thiol-functionalization MOFs material and application thereof in adsorption and removal of heavy metal ions in water. The thiol-functionalization MOFs (UiO-66-SH) material can effectively adsorb and remove the ions of heavy metal such as copper, cadmium, lead, mercury in the water. The method comprises the steps that 1, thiol-modified terephthalic acid organic ligands are synthesized; 2, the thiol-functionalization MOFs material (UiO-66-SH) is synthesized through a solvothermal method; 3, the thiol-functionalization MOFs material (UiO-66-SH) serves as an adsorbing agent to be applied to adsorption and removal for the heavy metal ions such as copper, cadmium, lead, mercury in the water. The thiol-functionalization MOFs material can efficiently adsorb and remove the ions of heavy metal such as copper, cadmium, lead, mercury in the water, and compared with ordinary UiO-66, the adsorption property of the material is significantly improved; in addition, the material can selectively adsorb and remove mercury ions on the high-concentration condition, and novel application of the material is widened.
Owner:江西智汇环境技术有限公司
Hybrid coating compositions
InactiveUS6896934B2Easy to cleanImprove acid resistanceElectrolysis componentsVolume/mass flow measurementScreen printingFrit
Owner:FERRO FRANCE S A R L
Composite chemical leaching method for remediation of heavy metal contaminated soil
ActiveCN103357655AEasy to handleShort rinse timeContaminated soil reclamationTreatment effectPaddy soils
The invention discloses a composite chemical leaching method for remediation of heavy metal contaminated soil. The method includes: leaching heavy metal contaminated soil 1-3 times by a composite leacheate prepared from ferric chloride and an organic acid, then further conducting leaching 1-3 time with distilled water, and finally separating the leacheate from soil. The method provided in the invention has the advantages of good treatment effect, short leaching time, no secondary pollution, simple operation, relative low cost, a highest cadmium removal rate of over 80%, and a highest lead removal rate of over 55%. The iron-containing compound involved in the invention is used as an improver of paddy soil. The residue of ferric chloride has a positive effect on chemical properties of soil, and cannot destroy the soil structure. The used organic acid is easy to degrade, and the degradation product can become nutrients of plants and is environment-friendly. The final leaching by water can reduce the content of metal ions and the leacheate residue in the remedied soil, thus being in favor of later crop tilling.
Owner:NANJING AGRICULTURAL UNIVERSITY
Organic tobacco field planting and field managing method
InactiveCN102630478ARealize organic productionResidue reductionFertilising methodsTransplantingTerrainChemical control
Owner:云南省烟草公司保山市公司
High-refraction and high- dispersion optical glass and method of manufacture
The invention provides a high-refraction and high-dispersion optical glass which comprises 4 percent to 16 percent of B2O3, 0 percent to 15 percent of SiO2, 0 percent to 10 percent of GeO2, 20 percent to 55 percent of La2O3, 0 percent to 20 percent of Gd2 O3, 8 percent to 20 percent of TiO2, 0 percent to 30 percent of Nb2O5, 0 percent to 8 percent of WO3, 0 percent to 20 percent of BaO, 1 percent to 10 percent of ZrO2, 0 percent to 18 percent of Ta2O5, 0 percent to 8 percent of Y2O3, 0 percent to 10 percent of Yb2O3, 0 percent to 15 percent of Lu2O3, 0 percent to 20 percent of Bi2O3, 0 percent to 1 percent of Li2O, etc. The optical glass of the invention contains no environmentally-harmful substances such as lead, arsenic, cadmium, etc., and Nd is more than or equal to 1.95 while Vd is less than or equal to 35; in addition, the L.T of the optical glass is lower than 1300 DEG C and the optical glass is applicable to the industrial mass production.
Owner:CDGM OPTICAL GLASS
Multiple element composite metal oxidate arsenic removal settling agent and use method thereof
The invention belongs to the material field for removing the arsenic in water by settlement, more particularly relates to polyelement composite metal oxide arsenic removal settlement agent and an application method thereof based on iron oxide, manganese oxide, and aluminum oxide. The invention uses an ectopic preparation method or situ preparation method for preparing and obtaining polyelement composite metal oxide arsenic removal settlement agent which comprises hydrated iron oxide, hydroxyl-hydrated ferric hydroxide, hydrated aluminum oxide, hydroxyl-hydrated alumina, hydrated manganese oxide and the like. The polyelement composite metal oxide arsenic removal settlement agent can be used for removing the arsenic pollutants in water bodies such as lakes, reservoirs, rivers, groundwater, drinking water, industrial waste water, and the like; in addition, the settlement agent can also be used for removing the heavy metals such as copper, chromium, cadmium, lead, and the like, and the pollutants such as iron, manganese, phosphates, and the like in water by settlement.
Owner:RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
Process for comprehensive recovery of indium, cadmium, thallium and zinc from lead system smoke
InactiveCN101255502ALess investment in equipmentImprove efficiencyProcess efficiency improvementZinc sulfate monohydrateIndium
The invention relates to a method for comprehensively recycling indium, cadmium , thallium and zinc from electric precipitation dust and reverberator dust in a lead smelting system. Indium in the reverberator dust is recycled by leaching, extracting, back extracting and cementing, the post-replacing liquid can be used for recycling zinc butter or preparing nanometer zinc oxide, middle faffinate is used for leaching electric precipitation dust, cementing out cadmium and further producing pure cadmium, the residual liquid mainly includes zinc sulfate solution as the raw material for preparing zinc oxide, zinc sulfate monohydrate, zinc vitriol to recycle zinc, the slag produced in the leaching process is returned to a lead system for recycling lead, secondary cementing slag produced by a cadmium system is pile-up oxidized and leached by alkali, the slag is returned to the cadminum system for recycling cadmium and zinc, the liquid is added with sulphuric acid to adjust the pH value, then thallium is recycled by a zinc plate. The process takes indium recycle and cadmium recycle into consideration and optimizes the process, indium, cadmium , thallium and zinc in the raw material are recycled at the same time, so that better economical benefit can be produced.
Owner:HENAN YUGUANG GOLD & LEAD
Super-wide environmental-friendly decorative film material and preparation technology thereof
ActiveCN103059473ASolve the problem of strong odor at the beginning of useGuaranteed flatnessFlat articlesEnvironmental resistanceHazardous substance
The invention relates to a super-wide environmental-friendly decorative film material and a preparation technology thereof. The super-wide environmental-friendly decorative film material is prepared from high degree-of-polymerization PVC (Polyvinyl Chloride) resin powder, a environmental-friendly plasticizer, a stabilizer, a fire retardant, an internal lubricant and a mildew preventive serving as main raw materials by adopting working procedures such as material sieving, material blending, high-speed mixing, smelting, crude refining, refining, extrusion and filtrating, rolling, embossing, cooling and shaping, trimming, reeling and the like. The super-wide environmental-friendly decorative film material solves the problem that a general plastic decorative film has strong peculiar smell when coming into use, does not contain harmful substances such as phthalate, lead and cadmium, and is environmental-friendly, suitable for use in rooms and harmless to human bodies. Mountain and water streaks are prevented from occurring in the product so that the product has excellent appearance smoothness; due to addition of high-quality mildew preventive, the problem that the product goes moldy after being used for a long time is avoided; and in addition, the width of the product can reach 5 meters so that the product is suitable for use in specific occasions.
Owner:浙江明士达股份有限公司
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