206results about How to "Strong enrichment ability" patented technology

The invention provides a method for restoring heavy metal contaminated soil through an activating agent and microorganism reinforced plants. The method includes the following steps that firstly, the activating agent is added to the heavy metal contaminated soil, and the soil is tilled evenly and activated for 10 d to 20 d; secondly, complex microorganisms are inoculated in the activated soil, castor oil plants are planted for 1 to 2 periods, and one year is a period; thirdly, the castor oil plants planted in the second step are completely removed from the soil, the activating agent is added, and the soil is activated for 10 d to 20 d; fourthly, nightshade is planted in the soil activated in the third step for 2 to 3 periods, and one year is a period; fifthly, heavy metal in the castor oil plants obtained in the second step and the nightshade obtained in the third step is recycled; and sixthly, the first step to the fifth step are cycled till the content of the heavy metal in the soil reaches the standard. By the adoption of the method for restoring the heavy metal contaminated soil, the soil can be activated and improved, cost is low, contamination is small, and the heavy metal in the soil is efficiently removed.

The invention discloses a surface-modified molecular-imprinted solid-phase microextraction probe and a preparation method therefor. The surface-modified molecular-imprinted solid-phase microextraction probe disclosed by the invention is obtained through taking malachite green as template molecules, and subjecting an organosilicone modified acrylate molecular imprinting emulsion to a thermal polymerization reaction on a tipped wood fiber substrate, of which the surface is rich in hydroxyl group. The solid-phase microextraction probe can be used for directly carrying out high-selectivity extraction on a trace amount of malachite green and structure-similar compounds with triphenylmethane and amino groups from a variety of complicated matrix samples, and the extracted probe can be used for directly carrying out electrospraying mass spectroscopy on a target object under normal-pressure open conditions, so that the probe has extremely high sensitivity and ideal repeatability.

The invention discloses a large area MEMS membrane type gas enricher, comprising a silicon substrate, a top cap and an enriching region arranged between the silicon substrate and the top cap; wherein the top cap is provided with an air inlet and an air outlet, the enriching region is composed of a plurality of enriching units, each enriching unit is provided with a hanging membrane which are provided with a film heater and an adsorption film, and a silicon frame which are arranged all around the hanging membrane. The invention not only has the advantages of small heat capacity and fast heating rate but also effectively increases absorption area and absorption gross and improves enriching rate by combining a plurality of enriching units.

The invention discloses a method for restoring copper-polluted soil by plants. The method provided by the invention is characterized in that dayflower seedlings subjected to cutting propagation are planted in copper-containing soil, grow and are harvested or are pulled up during harvest time; and copper is recovered. Concretely, the method comprises the following steps of 1, cutting off stems of dayflower plants, carrying out cutting propagation of the stems by a cutting bed according to plant and row distances of 5cm*10cm, and keeping soil moist after cutting, 2, flattening a sample area in copper-polluted zone, and digging planting holes, 3, planting dayflower seedlings rooting in the cutting bed in copper-containing soil, 4, harvesting overground parts of the dayflower seedlings or pulling up the whole dayflower seedlings with roots, and 5, drying and crushing the harvested overground parts of the dayflower seedlings or the whole dayflower seedlings with roots, and carrying out copper recovery. The method provided by the invention has the advantages of low cost, high restoration efficiency and low environmental risk, and can be utilized for restoration of copper-polluted soil in industry and agriculture and for reconstruction of ecological vegetation in a mine tailing area.

The invention is aimed at the phenomena that an acidic waste storage yard of a non-ferrous metal mine is bare and barren due to the fact that pollutants are high in content and high in acidity. The following measures are taken to recover the vegetation of the area: (1) waste on the surface, calcium oxide and slag are mixed evenly and are maintained for 2-3 weeks; (2) a layer of sludge from a sewage processing factory or bottom mud generated in the dredging process of rivers, lakes and reservoirs is laid, then a layer of the calcium oxide is laid, and maintenance lasts for 4-5 weeks; (3) natural pioneer dominant plant species of the specific mine area are adopted, and then a natural recovery method is adopted to achieve the purpose of recovering the vegetation of the mine area. The method for recovering the vegetation of the acidic waste storage yard of the non-ferrous metal mine has the advantages of being easy and convenient to operate, low in cost and recyclable in waste.

The invention discloses a culture method for original ecology pollution-free chicken capable of laying green-eggshell eggs. The culture method is optimized in the aspects of chicken house construction, incubation, nutrition and feeding, prevention and treatment of diseases and the like. The emphasis of the method lies in that 20-week old chicken are put in a karst landform garden of a stone forest to be stocked, and meanwhile, manually prepared chicken feed is avoided. Maize and wheat purchased from local farmers are directly used for feeding the chicken, and fly maggots which accounts for 5-10% by mass of food intake are added into the chicken feed. According to the green-eggshell eggs obtained by virtue of the culture method, the main nutrients of the eggs: selenium, zinc and iodine are 3-6 times higher than those of common eggs, the content of cholesterol is 20% lower, and the content of proteins is 12.7% higher. The eggs belong to eggs which are high in zinc, ferrum, calcium and protein and low in cholesterol, are special eggs capable of developing intelligence and improving intelligence quotient, and are suitable for people, especially pregnant women, infants, adolescent and quinquagenarian to eat.

The invention discloses a remediation method for heavy-metal-contaminated soil and relates to the field of ecological environment remediation. The method comprises the steps that ragweed is planted on the heavy-metal-contaminated barren land; and the ragweed is reaped, transferred, incinerated and subjected to heavy metal extraction sequentially in the period before the start of the flowering period of the ragweed. According to the remediation method, the heavy-metal-contaminated soil is remedied through the ragweed, the ragweed grows fast in the growing period and branching period, and the ragweed has the high absorption function and enrichment function on the heavy metal pollution in the soil; and the ragweed has the beneficial effects of being high in growth speed, large in biomass, high in adaptability, low in cost, wide in distribution and the like, a lot of lead, cadmium and the like in the soil, especially in the overground part, can be transferred into the plants, the ragweed is reaped and transferred manually before the flowering period and is incinerated, then heavy metals are extracted, and therefore the soil pollution such as lead and cadmium is remedied, and the higher economic value and economical environment value are provided for the effective utilization of heavy metal soil remediation by the plants and invasive alien species.

The invention provides a preparation method for a ferroferric oxide/graphene oxide (Fe3O4/GO) magnetic composite material. Go is bonded on the surface of a magnetic microsphere modified by sulfydryl through a click chemical synthesis method by using a lot of epoxy active groups contained on the surface of the GO. A preparation process comprises the following steps: adding the sulfydryl modified magnetic microsphere Fe3O4/SiO2/SH and the GO into a water solution with the pH (Potential of Hydrogen) of 6.5-10.0; carrying out ultrasonic dispersion, reacting at 60-100 DEG C and stirring; after reaction is completely stopped, applying a magnetic field to separate the Fe3O4/GO from liquid; and finally, washing with the water, and drying in vacuum. The preparation method is simple and rapid and moderate in conditions; a lot of Fe3O4/GO magnetic composite materials coated by the GO are successfully prepared. Particularly, the surface of Fe3O4/GO-B of the Fe3O4/GO magnetic composite material which is prepared when the pH of the water solution is 6.5-7.5 has a very thick graphene oxide coating and the enrichment capacity is better.

The invention provides a carbon nanotube solid phase extracting disk for enriching and/or separating organic pollutants in an environmental sample and a preparation method thereof. The extracting disktakes a carboxylated single-walled carbon nanotube as a core and is covered with a hydrophilic polymer on the outer layer, and preferably, a carboxylated single-walled carbon nanotube extracting diskcovered with the hydrophilic polymer. The extracting disk simultaneously combines small grain diameter, high extraction speed, large special surface area of nano material, strong adsorption capacityof carbon nanotubes, electrostatic adherence of surface carboxyl as well as fine hydrophilicity and volume exclusion of an alginic acid polymer and also has higher enrichment and extraction capacity to endocrine disrupters and sulfonamides. In addition, the extracting disk is simple to prepare, low in cost and very suitable for rapidly preprocessing large-scale and large-volume water samples in batch.

The invention relates to a cinnamate type ultraviolet sun-screening agent molecular engram solid-phase extraction column as well as preparation and application thereof, and belongs to the technical field of solid-phase extraction of detection analysis. According to the invention, iso-octyl p-methoxycinnamate is adopted as a template molecule, methacrylic acid is adopted as a functional monomer, ethylene glycol dimethyl acrylic ester is adopted as a crosslinking agent, azodiisobutyronitrile is adopted as an initiating agent, cinnamate type ultraviolet sun-screening agent molecular engram polymer microspheres are obtained by virtue of a precipitation polymerization method, and the obtained polymer microspheres are filled into a solid-phase extraction column through a wet method. The molecular engram polymer solid-phase extraction column provided by the invention can selectively adsorb a cinnamate type ultraviolet sun-screening agent, and compared with a conventional solid-phase extraction column, the molecular engram polymer solid-phase extraction column overcomes the defect of poor selectivity of a conventional solid-phase extraction filler, is strong in adsorptivity, high in extraction recovery rate, and achieves efficient selective separation, enrichment and purification of a trace amount of the cinnamate type ultraviolet sun-screening agent in various environments and biological samples.

The invention discloses an electrochemical sensor based on a chiral covalent organic framework compound and belongs to the technical field of electrochemical detection. The electrochemical sensor disclosed by the invention is obtained by modifying the covalent organic framework compound COF-CTpPa-2 on a matrix electrode, and can be used for enriching and separating a small molecular electric active substance with a pi conjugated structure; when the molecular diameter of a substance is less than the pore diameter of the COF-CTpPa-2, the enrichment effect of the sensor on the substance is more obvious when the quantity of benzene rings of the substance is more; meanwhile, the electrochemical sensor also can be used for distinguishing and identifying the chiral compound.

The invention relates to an alfalfa planting method in high and cold areas and belongs to the field of planting. The method comprises the following steps: soil selection, soil preparation, seed cultivation, sowing and planting, field management, cradling time, water irrigation treatment and film laminating overwintering. By applying organic fermented liquid residues to soil during soil preparation, the usage of an inorganic chemical fertilizer is reduced; by uniformly spraying an alfalfa nutritional liquid every 35-50 days, water sufficiency when the alfalfa grows is guaranteed, and supplement of nutritional matters when the guarantee grows is also guaranteed. A trace element liquid in the alfalfa nutritional liquid contains trace elements such as copper, manganese, molybdenum, zinc and selenium, so that nutritional substances of alfalfa are supplemented. Because alfalfa as an important high quality feed has superstrong absorption capacity and enriching capacity on selenium and zinc and is an important carrier for converting inorganic selenium and zinc into organic selenium and zinc, an important source of extracting selenium and zinc from animals and people is realized. According to the method provided by the invention, the annual dry weight output of alfalfa in the high and cold areas is 1005.4kg/mu.

The invention provides an ozone oxidation catalyst based on an active carbon carrier. The ozone oxidation catalyst based on the active carbon carrier is an active carbon-supported metal oxide, whereinthe metal oxide is at least one selected from a group consisting of iron oxide, copper oxide, ruthenium oxide, cerium oxide, cobalt oxide, manganese oxide and nickel oxide.

The invention provides a preparation method of a magnetic-metal organic framework MOF material. According to the preparation method of the magnetic-metal organic framework MOF material, an inorganic hydroxyapatite nanowire is used as a support; magnetic nano particles are functionalized on the surface of the hydroxyapatite nanowire; the hydroxyapatite nanowire is used as a template to perform theinduced assembly on the surface of the mag-HAP nanowire to form MOF nano crystals of Fe3O4. Firstly, the surface of the hydroxyapatite nanowire has rich active sites, and the magnetic nano particles directly grow on the surface, so that the agglomeration of the magnetic nano ions during the growth can be avoided. Secondly, the magnetic-metal organic framework MOF material has the characteristics of porous structure, large pore volume and good hydrophilcity, thereby improving the concentration efficiency and the concentration capability. Thirdly, the excellent super-paramagnetic magnetic response capability simplifies the separation process. The mag-MOF nano fibers prepared in the invention have high selectivity, low detection limit, ideal concentration recovery rate, excellent concentration capability and good reusability.

The invention provides a method for determining antibiotic in an environment water body through synchronization of liquid chromatography and mass spectrometry. The method comprises the following steps: 1) reducing background interference from an experiment vessel; 2) preparing a sample; 3) stably preserving the sample; 4) performing solid-phase extraction and enrichment on a to-be-measured objectin a water phase; 5) purifying the sample and eluting the sample; 6) performing concentration and enrichment; and 7) determining the material by using the high-performance liquid chromatography-tandemmass spectrometry. The method absorbs good enrichment capability of solid-phase extraction and good separating capability of a liquid phase, and characteristic of accurate quantification of added standard internal standard substances, and the method has obvious effect for detecting the trace-quantity antibiotic in different types of the environment water bodies. The method performs exploration and test on a solid-phase extraction elution solvent, a liquid-phase separating mobile phase, and mass spectrum conditions.

The invention discloses synthesis and application of a photosensitive medicament taking folic acid as a targeted group. Micro-molecular folic acid is selected to serve as the targeted group to link Pyro. Because of the water solubility of the folic acid and a hydrophilic group in a linker, the linker can improve the water solubility and the pharmacokinetic characteristics of the Pyro so as to improve a photodynamic treatment effect.