92 results about "Chelation heavy metals" patented technology

A two-step chemical precipitation process involving hydroxide precipitation and sulfide precipitation combined with “field separation ” technology such as magnetic separation, dissolved air flotation, vortex separation, or expanded plastics flotation, effectively removes chelated and non-chelated heavy metal precipitates and other fine particles from water. In the first-step, the non-chelated heavy metals are precipitated as hydroxides and removed from the water by a conventional liquid/solids separator such as an inclined plate clarifier to remove a large percentage of the dissolved heavy metals. The cleaned water is then treated in a second precipitation step to remove the residual heavy metals to meet discharge limits. In the second precipitation step, any metal precipitant more effective than hydroxide for metal precipitation can be used. The invention improves metal removal, lowers cost because fewer chemicals are used, produces less sludge, and reduces the discharge of toxic metals and metal precipitants to the environment. Magnetic separation is preferred for the separation of particles precipitated in the second stage. Similar methods can be employed for separation of other particulates from water. Particulates can also be removed by causing them to adhere to particles of expanded plastic, forming a floc lighter than water, so that the floc can be removed by flotation.

The invention belongs to the technical field of heavy metal wastewater treatment, and in particular relates to cyanuric acid-based heavy metal chelating flocculant and a preparation method thereof. In the method, cyanuric acid is adopted as a basic framework; and polyamine is connected to a molecule through epoxy chloropropane, and reacts with carbon disulfide in an alkaline condition to prepare the heavy metal chelating flocculant of which the molecule contains a plurality of branches and a plurality of dithio formate functional groups. The method overcomes the defects that the conventional monofunctional flocculant has small flocculating body, and poor precipitation performance, and when polymeric chelant chelates heavy metals, steric clash is great, and the residual heavy metal ion concentration is difficult to meet the standard and the like. The flocculant has the advantages of simple preparation process, mild condition, easy operation and control, high yield, high raw material utilization, less three waste discharge and environmental protection of technical process, convenient popularization and industrialization realization and suitability for treatment of various types of heavy metal wastewater, such as smelting wastewater, electroplating wastewater, nonferrous metals processing wastewater, mining and beneficiating wastewater, printed circuit board wastewater, battery plants and the like.

A two-step chemical precipitation process involving hydroxide precipitation and sulfide precipitation combined with “field separation” technology such as magnetic separation, dissolved air flotation, vortex separation or expanded plastics flotation, effectively removes chelated and non-chelated heavy metal precipitates and other fine particles from water. In the first-step, the non-chelated heavy metals are precipitated as hydroxides and removed from the water by a conventional liquid/solids separator such as an inclined plate clarifier to remove a large percentage of the dissolved heavy metals. The cleaned water is then treated in a second precipitation step to remove the residual heavy metals to meet discharge limits. In the second precipitation step, any metal precipitant more effective than hydroxide for metal precipitation can be used. The invention improves metal removal, lowers cost because fewer chemicals are used, produces less sludge, and reduces the discharge of toxic metals and metal precipitants to the environment.

The invention belongs to the technical field of removal, purification and entrapment of heavy metal ions in a water body, and in particular relates to an ethylenediamine-based heavy metal chelating agent and a preparation method thereof. The ethylenediamine-based heavy metal chelating agent is prepared by directly reacting ethylenediamine, carbon disulfide and solid alkali in absolute ethyl alcohol or a mixed solvent consisting of absolute ethyl alcohol and diethyl ether in a certain volume ratio. The method overcomes the defect of steric effect of polymer chains when the conventional polymeric chelating agent chelates the heavy metal ions, and also overcomes the defect that floccules have excessive negative charge to obstruct the further growth of the floccules because of mismatched space of chelation groups of small molecules with multiple functional groups. The product is solid powder, has high stability and is convenient to store and transport. The method has the advantages of simple synthetic process, mild reaction conditions, easy operation and control, high reaction speed, high efficiency, recyclable solvent, high utilization rate of raw materials, less discharge of three wastes, environmental-friendly technical process, conventional equipment and easy industrial production.

The invention discloses tea feeds and a preparation method. The preparation method comprises the following steps of 1, crushing tea waste, spraying water until the humidity is 15 to 25 percent, adding a combined strain of trichoderma, aspergillus niger and aspergillus oryzae, and performing piling and fermentation; 2, drying and crushing the fermented tea waste; 3, uniformly blending 100 weight parts of fermented tea waste, 20 to 100 weight parts of grain feed and 0.5 to 10 parts of yeast, spraying water until the humidity is 15 to 25 percent, simultaneously adjusting a pH value to be 4.5 to 6, and performing secondary fermentation for 3 to 4 days at 40 to 55 DEG C; 4, spreading the fermented mixture for cooling, and drying and crushing the mixture to obtain the tea feeds. According to the tea feeds and the preparation method, the effects of ordinary tea feeds of improving the disease resistance of livestock and poultry, increasing the egg and milk yield, enhancing the quality of meat and reducing the fishy smell and urine odor are maintained; in addition, every gram of selenium-rich tea waste contains 0.02 to 0.1 microgram of selenium, so that anti-oxidation effects are further improved; moreover, selenium-P proteins have the effects of chelating toxic substances such as heavy metal and reducing the toxicity of the toxic substances.

The invention discloses a preparation method and application of functionalized polyvinyl alcohol microspheres. The preparation method comprises the following steps: uniformly mixing polyvinyl alcohol microspheres, epoxy chloropropane and a hydrochloric acid solution, carrying out a stirring reaction for 1-5 hours in a water bath, and carrying out centrifuging, water cleaning and drying for later use after the reaction; uniformly mixing the obtained chloridized polyvinyl alcohol microspheres, tetrabutylammonium bromide, ethidene diamine and a sodium hydroxide solution, carrying out the stirring reaction for 4-10 hours in the water bath, and carrying out the centrifuging, ethanol cleaning and the drying for later use after the reaction; and uniformly mixing the obtained aminated polyvinyl alcohol microspheres with 2-(2-pyridine) azo-resorcinol, formaldehyde and distilled water, stirring for 6-18 hours in the presence of nitrogen, and carrying out the centrifuging, the ethanol cleaning and the drying after the reaction, so as to obtain an end product. The functionalized polyvinyl alcohol microspheres provided by the invention can be used for chelating heavy metal and detecting and processing divalent heavy metal ions in wastewater and have the characteristics of simple preparation condition, low cost, short detection response time and high adsorption capacity.

The invention discloses an aquaculture microorganism substrate improver having a triplet efficacy and a preparation method thereof. A high viable content can still be kept in the production and transportation process, and the effect of the viable content can still be efficiently played under a low-oxygen-solubility condition on the bottom of a pond. Organic substances such as bait residues and manure can be decomposed, and the pathogenic microorganism can be inhibited; organic phosphorus in the water is converted into inorganic phosphorus, and the growth of phytoplankton is promoted; nitrite nitrogen in the water is converted to nitrogen to removal water, so that the content of the water nitrite nitrogen is reduced; and heavy metal ions are chelated, so that the toxicity of heavy metal is reduced, a triplet efficacy of bottom improvement, water regulation and detoxication can be realized, and the water environment is comprehensively improved. The aquaculture microorganism substrate improver is prepared from the following components in parts by weight: 1 to 3 parts of zeolite powder, 2 to 8 parts of bentonite, 0.5 to 4 parts of diatomite, 1 to 3 parts of polyglutamic acid powder, and 2 to 8 parts of composite probiotics powder.

The invention discloses a high molecular heavy metal chelating flocculant and a preparation method thereof. The high molecular heavy metal chelating flocculant is prepared by the following steps of: quaternizing diallyl methylamine and epoxy chloropropane in an organic solvent, and grafting polyethylene polyamine onto molecules by performing epoxy group ring opening with polyethylene polyamine; decolorizing with active carbon, and evaporating and concentrating to obtain a diallyl quaternary ammonium salt monomer solution; polymerizing through a free radical aqueous solution to synthesize a diallyl quaternary ammonium salt polymer; and reacting with carbon bisulfide and sodium hydroxide. The high molecular heavy metal chelating flocculant is characterized in that: each structural unit of ahigh molecular chain is provided with a positive charge and a plurality of strong chelation groups -CSS- with negative charges, so that the defect of non-uniform positive charge distribution of the conventional ampholytic chelating flocculant is avoided, neutralization of negative charges produced in a floc forming process is facilitated, a floc structure is improved, the formation and growth of floc are promoted, the heavy metal ion chelating capability and flocculating settling performance are enhanced, and the size of sediments is reduced.

The invention relates to heavy metal adsorption copolymer with a sulfonic acid group and a preparation method and application thereof. The preparation method is simple, and easy to operate; and the copolymer can effectively adsorb Cr<3+>, Cd<2+>, Cu<2+> and Pb<2+> ions when used for water treatment. The preparation method of the heavy metal adsorption copolymer with the sulfonic acid group comprises the following step of: performing radiation polymerization on 2-acrylamide-2-methylpropanesulfonic acid (AMPS for short) and N-vinylformamide (NVF for short) in a molar ratio of 1:1-1:9 by using high-energy rays, wherein the radiation dose of the radiation polymerization is 1*10<3> to 1*10<6>Gy, and the polymerization temperature is between -63 and -95 DEG C. The copolymer has a good pore structure, can effectively adsorb and chelate heavy metal ions, and has certain mechanical strength and long service life.

The invention relates to polymer hydrogel and a preparation method thereof. The polymer hydrogel comprises polymerized N-vinyl imidazole and hydroxyethyl acrylate, wherein the molar ratio of the N-vinyl imidazole to the hydroxyethyl acrylate is 1:1 to 1:9. The preparation method comprises the following steps of: uniformly mixing the N-vinyl imidazole, the hydroxyethyl acrylate and water; then charging nitrogen, and polymerizing by adopting high-energy ray irradiation at the temperature of minus 63 DEG C to minus 95 DEG C to obtain the polymer hydrogel. The polymer hydrogel provided by the invention has a good pore structure, contains multiple functional groups capable of adsorbing heavy metals, has high capacity of adsorbing ions including Pb<2+>, Cr<3+>, Cd<2+> and Cu<2+>, can effectively adsorb and chelate heavy metal ions, has certain mechanical strength and long service life, and can be used for sewage treatment. In the preparation method, an initator does not need to be added so that the pureness of the polymer is ensured; and the preparation method is simple and easy to operate.

The invention relates to the field of daily use chemicals and in particular relates to a facial cleanser for effectively preventing haze hazards. The facial cleanser comprises the following raw materials in parts by weight: 0.1-10 parts of chitosan and derivatives thereof, 5-25 parts of an amino acid-based surfactant and 0.2-3 parts of a thickening agent, wherein the chitosan and derivatives thereof are selected from one or more in chitosan, water-soluble chitosan, N-trimethyl chitosan, N-malely chitosan, carboxymethyl chitosan, hydroxypropyl chitosan or beta-cyclodextrin grafted chitosan; and the deacetylation degree of the chitosan and derivatives thereof is 60-99 percent. The chitosan and derivatives thereof are added into the amino acid-based facial cleanser, and the slightly acidic facial cleanser disclosed by the invention is rich in foam, high in stability, mild and non-irritating, has the effects of inhibiting bacteria and chelating heavy metals and is applied to skin care in hazy weather.

The invention discloses an in-situ ecological restoration technology integration system for black and odorous rivers and lakes. The system comprises a water purification microbial preparation, a micro-nano plug flow aerator, a stirrer, an ecological grass water purification unit, a nano-filtration water purification unit, a monitoring and controlling center, a sensor unit, a wireless network unit and a solar photovoltaic power station. The water purification microbial preparation is used for absorbing and mineralizing organic carbon and organic nitrogen, chelating heavy metal and immobilizing soluble phosphate. The micro-nano plug flow aerator is used for carrying out water body oxygenation, aeration and plug flow formation and putting the water purification microbial preparation to achieve nanocrystallization of bubbles. The monitoring and controlling center is used for monitoring water quality indexes on line and automatically correcting control commands according to water quality changes. By means of the system, the concept of only treating water in traditional pollution treatment is broken, a breakthrough is obtained, the self-purification capability of rivers, lakes and shallow seas can be rapidly recovered in a short time, a biologic chain system can be activated, a water ecological benign cycle can be formed, and the purpose of treating wastewater fundamentally can be achieved. The invention further discloses a control method based on the in-situ ecological restoration technology integration system for black and odorous rivers and lakes.

The invention relates to the field of cosmetics, in particular to moisturizing and anti-aging cosmetics containing a kohlrabi extract and a preparation method of the cosmetics. The cosmetics consist of the following components: 5-15 parts of the kohlrabi extract, 0.6-3.2 parts of vitamin, 1-5 parts of an antioxidant, 3-12 parts of an anti-wrinkle activator, 1-3 parts of a sun-screening agent, 0.5-2 parts of an anti-allergy agent, 2.5-6 parts of a whitening agent, 2-12 parts of a moisturizer, 0.03-0.2 parts of potassium hydroxide, 0.5-2 parts of acer truncatum seed oil, 0.3-1.2 parts of a chelating agent, 0.1-0.3 parts of a thickening agent, 1.5-5.8 parts of an emulsifier, 0.2-1 part of a preservative and 40-80 parts of de-ionized water, and specifically, the cosmetics can be prepared into such products as a repair cream, a repair emulsion, an essence cream and the like. The cosmetics disclosed by the invention have the beneficial effects that the cosmetics are capable of effectively improving skin elasticity and delaying skin aging; the cosmetics are capable of improving skin color, and the cosmetics, when used for a long time, can take a whitening effect; the cosmetics, with the addition of the anti-allergy agent, can avoid a phenomenon of allergy; the cosmetics, which are chelated with heavy metals, are capable of eliminating heavy metal pollution; and the cosmetics are capable of relieving wrinkles, improving skin and increasing the brightness and the whiteness of the skin.

The invention provides a graft copolymer of starch and methacrylic dehydrated glyceride. The main chain of the graft copolymer is the starch; the branched chain of the graft copolymer is the polymethacrylic dehydrated glyceride; part of the epoxy group on the branched chain is aminated into -OCH2CHOHCH2-NH2NH2 or -OCH2CHOHCH2-NH-(C2H4NH)n-C2H4-NH2 and n is equal to 0 to 3; and the graft rate is 20 to 82.1 percent and the nitrogen content is 1 to 20.06 percent. The graft copolymer of the invention can chelate heavy metal ion, and the removing rate of the heavy metal ion reaches over 99 percent when the graft copolymer is used for treating waste water containing the heavy metal ion.

The invention relates to a three-element copolymerized hydrogel and a preparation method thereof. The preparation method is simple, and easy to implement; and the obtained three-element copolymerized hydrogel can effectively adsorb Cr3+, Cd2+, Cu2+ and Pb2+ ions. The preparation method for the three-element copolymerized hydrogel comprises the following step of: performing radiation polymerization on hydroxyethyl acrylate, n-ethylene dimethacrylate and 2-acrylamide-2-methylpropanesulfonic acid, wherein the molar ratio of the hydroxyethyl acrylate to the n-ethylene dimethacrylate to the 2-acrylamide-2-methylpropanesulfonic acid is (1-2):(0.1-0.6):(0.1-0.7); the n-ethylene dimethacrylate monomer is one of 2G, 4G, 9G and 14G; the radiation dosage of radiation polymerization is 1*103-1*106Gy;and the polymerization temperature is between -63 and -95DEG C. The invention has the advantages that: the three-element copolymerized hydrogel can effectively adsorb and chelate heavy metal ions; and the preparation method is simple, and easy to implement.

The invention relates to the field of cosmetics, in particular to moisturizing and anti-aging cosmetics containing a foldleaf daylily root extract and a preparation method of the cosmetics. The cosmetics include the following components: 5-15 parts of the foldleaf daylily root extract, 0.6-3.2 parts of vitamins, 1-5 parts of an antioxidant, 3-12 parts of an anti-wrinkle activating agent, 1-3 parts of a sun-screening agent, 0.5-2 parts of an anti-allergy agent, 2.5-6 parts of a whitening agent, 2-12 parts of a moisturizer, 0.03-0.2 parts of potassium hydroxide, 0.5-2 parts of acer truncatum seed oil, 0.3-1.2 parts of a chelating agent, 0.1-0.3 parts of a thickening agent, 1.5-5.8 parts of an emulsifier, 0.2-1 part of a preservative and 40-80 parts of de-ionized water; and specifically, the cosmetics can be prepared into such products as a repair cream, a repair emulsion, an essence cream and the like. The cosmetics disclosed by the invention have the beneficial effects that the cosmetics can effectively improve skin elasticity and delay skin aging; the cosmetics can improve skin tone, and the cosmetics, when used persistently, can take a whitening effect; with the addition of the anti-allergy agent, a phenomenon of allergy is prevented; heavy metals are chelated, so that heavy metal pollution is eliminated; and the cosmetics can relieve wrinkles and improve the skin, and the cosmetics can improve brightness and whiteness of the skin.

The technical problem solved by the invention is to develop an imprinting modified chitosan with the capability of chelating heavy metal. The imprinting modified chitosan disclosed by the invention has the effect of targeting active liver and is capable of effectively removing the heavy metal in the liver. The preparation method of the imprinting modified chitosan disclosed by the invention comprises the following steps: preparing modified chitosan, optimizing reaction conditions, detecting the purity of the modified chitosan, imprinting the modified chitosan, detecting the capability of the modified chitosan for removing lead under the in-vitro condition, determining the capability of removing lead via animal experiments, determining toxicity test of the imprinting modified chitosan and acquiring the imprinting modified chitosan with the capability of chelating the heavy metal.

The invention discloses a combination capable of preventing hazy weather from injuring skins and an application of the combination. The combination comprises in parts by weight, 1-5 parts of kelp extracts and 1-5 parts of alteromonas fermenting product extracts. The combination can effectively resist injury of pollutant components in air to human skins and damage caused by chelating heavy metal and repairing heavy metal and can reduce free-radical injury.

The invention relates to the field of cosmetics, in particular to a face-cleansing type cosmetic containing daylily extract and a preparation method thereof. The face-cleansing type cosmetic comprises 5-15 parts of the daylily extract, 0.6-3.2 parts of mineral matter, 3-10 parts of face-cleansing type surfactant, 0.3-1.2 parts of an anti-inflammation and antiallergic agent, 2.5-6 parts of a skin whitening agent, 2-12 parts of humectant, 0.1-0.3 part of potassium hydroxide, 0.1-0.3 part of thickener, 1.5-5.8 parts of emulsifier, 0.2-1 part of preservative and 40-80 parts of deionized water. The cosmetic can be made into products such as facial cleanser, liquid face wash and face cleansing cream and has the advantages that foam is abundant, stability is good, and the cosmetic is mild and free of stimulation and has the functions of inhibiting bacteria and chelating heavy metal; skin color is improved, and the skin whitening effect is achieved if the cosmetic is used for a long time; mineral matter constituents are added, so that the cleansing effect is better; the cosmetic is used for cleaning the face, melanin precipitation and external dust adhesion are reduced, inertial skin is excited, and fatigue is removed.

The invention relates to a preparation method of makeup removal hydrating mask capable of removing heavy metal. The hydrating mask is prepared from 0.1-1.0% of carboxymethyl chitosan and 0.1-1.0% of sodium alginate as main ingredients and other regulatory substances. The mask provided by the invention has effects of chelating heavy metal, moisturizing, killing mites, inhibiting bacteria, improving skin and so on. The makeup removal hydrating mask is suitable for people who use made-up products for a long period of time.

The invention discloses a shrimp farming method. The method comprises the steps that an enclosed shrimp pond is built on the seaside, a second dike is arranged on the shrimp pond, the shrimp pond is divided into an A zone and a B zone, wherein the B zone is arranged on a place near the seaside, a first dike is arranged on the edge, the first dike is provided with a first water inlet, the second dike is provided with a second water inlet, the A zone is provided with a drainage exit and a third valve and a third filter net, the A zone is also provided with a blocking net, and the A zone is provided with a separating net, and the A zone is divided into a number of equal area compartments by the separating net. According to the breeding method, the A and B zones are provided, the farming zone is provided with the blocking net to prevent the blue crab from escaping in the farming process, the A zone is divided into compartments by the separating net which is favorable for the growth of the shrimp; the B zone is a purified water area, the amino acid chelate is adopted in the water purification to function as the sink pond role for chelate heavy metal, and an excellent environment is provided for shrimp farming.

The invention provides a fly ash chelating agent and a preparation method thereof. The fly ash chelating agent includes, by weight, 10% to 20% of trithione triazine trisodium salt, 3% to 8% of sodiumtrithiocarbonate, 2% to 6% of 2, 6-diamido pyridineethanethiol, 0.5% to 1.5% of 1, 3-bisbenzamido ethanethiol, 0.2% to 0.8% of an additive and 60% to 80% of water. The preparation method of the fly ash chelating agent comprises adding trithione triazine trisodium salt, sodium trithiocarbonate, 2, 6-diamido pyridineethanethiol and 1, 3-bisbenzamido ethanethiol into water, carrying out stirring to obtain a mixed solution, and adding the additive into the mixed solution. The preparation method has simple processes. The fly ash chelating agent is an organic sulfur compound chelating agent, has large molecular weight, a strong flocculating function and a strong heavy metal chelating capacity. The additive is soluble starch, improves the chelating ability of the chelating agent and reduces the toxicity of the macromolecular heavy metal chelating agent. The modified product is easily biodegrade.

The invention provides a total cholesterol detection reagent with high accuracy and disturbance resisting capacity and relates to the technical field of total cholesterol detection. A biological buffer CAPS (3-(hexanaphthene amino)-1-propanesulfonic acid) is used in the reagent R, and therefore the buffering ability is ensured; a surfactant octadecy trimethyl ammonium bromide and a surfactant EMULGEN-707 are added into the reagent R, the emulsification effect of the reagent is improved well, and the accuracy and specificity of the reagent are improved; stabilizers such as trehalose and mannitol are added into the reagent R, and the stability of the reagent can be improved effectively; hydroxy ethidene diphosphonic acid is added into the reagent R, heavy metal ions can be effectively chelated, and the accuracy of the reagent can be improved; chemical-resistant succinoxidase and bilrubin oxidase are added into the reagent, disturbance of ascorbic acid and bilirubin can be effectively removed, and the reagent is simple in preparation, low in price and very suitable for large-area clinical popularization.

The invention discloses hydrogel used for adsorbing heavy metal. The hydrogel is a copolymer composed of 2-vinyl-4,6-diamino-1,3,5-symtriazine and 2-acrylamide-2-methyl propane sulfonic acid according to the molar ratio of 1:3-2:3, the hydrogel is of a porous structure, the pore diameter of the porous structure is 12-28 micrometers, a part of amino of 2-vinyl-4,6-diamino-1,3,5-symtriazine and triazinyl form a hexatomic ring structure through hydrogen bonds so that the mechanical strength of the hydrogel can be enhanced, and sulfonic acid groups in the hydrogel are used for exchanging ions with heavy metal ions; meanwhile, amino groups in the hydrogel are used for chelating the heavy metal ions. The prepared hydrogel is provided with the porous network structure, which is beneficial for dispersing water molecules and absorbing the heavy metal; meanwhile, the hydrogel has a good cyclic adsorption property, can be used many times, and is more environmentally friendly.