17 results about "Heavy metal compound" patented technology

The invention provides a thiamine-releasing bacillus miguli and application of the thiamine-releasing bacillus miguli. According to the invention, a strain of Aneurinibacillus migulanus X3-3 with resistance to a plurality of heavy metals is screened and separated from soil subjected to combined pollution of heavy metals, and is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the registration number of the preservation center is CGMCC No.33798. The invention also discloses a method for preparing the Aneurinibacillus migulanus X3-3 with resistance to a plurality of heavy metals and application of the Aneurinibacillus migulanus X3-3. The strain can tolerate high-concentration heavy metal pollution, shows good heavy metal removal and solidification capabilities in water and soil, provides an efficient and environment-friendly microbial solution for remediation of a heavy metal combined pollution environment, and has a wide application prospect.

The application discloses a special leaching agent for organic matter and heavy metal compound contaminated soil and a preparation method thereof, relates to the technical field of leaching agents for compound contaminated soil and preparation thereof, and the preparation steps are as follows: first, carboxyl-modified fulvic acid is prepared, a mineral source fulvic acid is taken to prepare a suspension, high-purity nitrogen is introduced to remove oxygen, and then ammonium persulfate initiator is added; after water bath heating, acrylic acid monomer is uniformly and slowly added for reaction; after the reaction is completed, the system pH is adjusted; after dialysis and impurity removal, freeze-drying is carried out to obtain modified fulvic acid with an acrylic acid grafting rate of 15% to 30%; and the modified fulvic acid is taken to prepare a phosphate buffer suspension. The application improves the number of active functional groups of fulvic acid through acrylic acid grafting modification, greatly enhances the heavy metal chelation and polycyclic aromatic hydrocarbon solubilization capacity, and covalently crosslinks functional bacteria on the fulvic acid carrier, so that the functional bacteria can be adapted to different acid-base values of contaminated sites and are suitable for soil remediation of various compound contaminated sites.

A method for producing pure phosphate comprises providing (S10) a reextraction solution carrying a reextracted phosphate from a feed liquid comprising phosphoric acid contaminated with a heavy metal and iron, the reextraction solution being an aqueous solution of one of monoammonium phosphate and monopotassium phosphate. A base is added (S20) to the separated reextraction solution, raising the pH to 2-5.5, forming a heated solution and causing precipitation of a compound comprising iron and phosphate. And adding (S30) a precipitating agent for precipitating heavy metals. Separating (S40) the precipitated compound comprising iron and phosphate and the precipitated heavy metal compound. Thereafter, the heated filtered solution is cooled (S50) into a cooled solution, causing precipitation of the phosphate compound. The precipitated phosphate compound is removed from the cooled solution (S60). The cooled solution is recycled (S70) for use as an input back extraction solution in the back extraction operation. A system for producing pure phosphates is also disclosed.

The invention relates to a heavy metal-resistant selenium-resistant bacterium, a fungicide mixture and a heavy metal contaminated soil remediation method, and belongs to the technical field of microorganisms and soil remediation. The invention discloses an anti-heavy metal selenium-tolerant bacterium HM3, which is Microbacterium oxydans, and the preservation number of the anti-heavy metal selenium-tolerant bacterium HM3 is CGMCC (China General Microbiological Culture Collection Center) No.35476. The efficient synthesis capability of biological nano elemental selenium is realized, and the heavy metal resistance and adsorption capability are realized. When heavy metal contaminated soil is repaired, the nano biological selenium is sprayed to the surfaces of crops and can be chelated with heavy metal to form an indissolvable selenium-heavy metal compound; the microbacterium oxydans applied to the soil can reduce the bioavailability of the heavy metals in the soil environment and reduce the migration of the heavy metals in a soil-crop system by utilizing the adsorption and complexing capabilities on the heavy metals.

The invention discloses heavy metal resistant bacillus coagulans as well as a soil remediation agent and application thereof, and relates to the field of special medicament materials for soil pollution treatment and remediation service and material environment pollution treatment. The bacillus coagulans is Bacillus coagulans DBS06, the preservation number of the strain is CCTCC NO: M 20252772, and the strain has the characteristics of multiple heavy metal synergistic resistance, strong acid resistance and high spore yield, and can be used for efficiently synthesizing functional enzymes and active metabolites. The repairing agent is prepared by regulating and controlling the C / N ratio of a culture medium, supplementing an accelerating nitrogen source, combining two-stage culture of proliferation at 35-37 DEG C and induction at 40-45 DEG C, and adding regulation and control factors such as manganese sulfate and nano carboxymethyl cellulose. The remediation agent is suitable for green in-situ remediation of acidic, barren and heavy metal compound contaminated soil, and has good application prospects and popularization value.

The present invention relates to the technical field of powder coatings and coating quality control, and specifically to a detection method for film yellowing caused by nitrogen oxides in a powder coating curing furnace, which includes the following steps: S1: Prepare test panels. Use a metal substrate, treat it with an aqueous solution of heavy metal compounds and dry it, then coat it with a light-colored powder coating with a customized formula, and bake it into a film in an electric heating oven to make the film on the test panel uneven; S2: Detect the samples. This method can easily judge whether the nitrogen oxides in the curing furnace exceed the acceptable level for powder coating; for the problem of film yellowing that occurs during the coating process of ordinary powder coatings, this method helps to find and judge the cause to exclude whether it is the yellowing caused by nitrogen oxides in the furnace, so as to take corresponding corrective and preventive measures.

The invention discloses a preparation method of a heavy metal compound pollution remediation microbial agent and application of the remediation microbial agent in pollution remediation of an earth-process zinc smelting site. The heavy metal compound pollution remediation microbial agent comprises a compound bacterial solution and a purpureocillium lilacinum bacterial solution. The method comprises the following steps: inoculating bacillus subtilis, bacillus licheniformis and paenibacillus polymyxa strains into an LB liquid culture medium, and carrying out shake culture to obtain an activated composite strain; culturing the composite strain to a proliferation logarithmic metaphase to obtain a seed solution; supplementing glucose into the seed solution in batches to obtain a compound bacteria solution; inoculating the Purpureocillium lilacinum to a PDB liquid culture medium, and carrying out shake culture to obtain activated Purpureocillium lilacinum; putting the activated purpureocillium lilacinum into a bioreactor, and culturing until the hypha proliferation period, so as to obtain a large amount of purpureocillium lilacinum liquid. By adding the compound bacteria liquid, the biological effective state concentration of the heavy metals in the soil is increased, the heavy metal absorption amount of remediation plants is increased, and the extraction and remediation efficiency is improved.

The invention belongs to the field of passivation and remediation of heavy metal contaminated soil, and discloses a remediation method for heavy metal compound contaminated soil of an earth-process zinc smelting site by adopting a passivator compound. The method comprises the steps that a passivator compound is scattered into soil of the soil-method zinc smelting site, the scattering dosage is 100-600 kg / mu, ploughing is carried out, the passivator compound is evenly turned into the soil, after natural stabilization is carried out for 6-12 months, sampling is carried out, and the heavy metal concentration is analyzed; the passivator compound comprises more than one of a biochar material and a natural mineralizer, and the addition mass ratio of the biochar material to the natural mineralizer is (1-3): 1; the natural mineralizer is selected from more than one of sepiolite and hydroxyl phospholime. In the treatment method, the passivator compound is added to increase the pH value of the soil, so that the biological effective state content of various heavy metals in the soil is reduced, and the amount of various heavy metals absorbed by plants is reduced.

The invention relates to a method for screening heavy metal elements in automobile brake linings, which comprises the following steps: S1, selecting a base material matched with a to-be-detected sample matrix, and preparing a standard powder tabletting group by adding heavy metal compounds in a gradient manner; s2, detecting the standard tablet by using an X-ray fluorescence spectrum, synchronously verifying by adopting ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry), and establishing an XRF standard curve for matrix effect correction; s3, preparing a to-be-detected lining into a powder tablet matched with a base material, and realizing quantitative screening of heavy metals through XRF detection and standard curve comparison; wherein the base material is selected from a ceramic type or semi-metal type brake pad base material, and the deviation between the component content of the base material and the to-be-detected sample is less than or equal to 5wt%. The invention provides a heavy metal screening method with rapidness, accuracy and economical efficiency, provides a reliable online quality control means for the automobile brake lining, and reduces the risk of heavy metal pollution.

The application discloses a neonicotinoid pesticide-heavy metal compound contaminated soil remediation method, which comprises the following steps: after ploughing and leveling the neonicotinoid pesticide-heavy metal compound contaminated soil, applying bottom fertilizer and neonicotinoid pesticide remediation agent in sequence, ploughing and maintaining, and then transplanting grain amaranth seedlings; when the grain amaranth seedlings grow to the present budding stage, spraying a heavy metal activator to adsorb the soil heavy metal. The application can effectively adsorb, extract and degrade the heavy metal and the neonicotinoid pesticide in the neonicotinoid pesticide-heavy metal compound contaminated soil, reduce the heavy metal and the pesticide residue in the soil, and has the advantages of fast remediation speed, good effect, simple operation and large treatment capacity.

The present disclosure relates to a scavenger comprising a compound according to Formula (I) coupled to a carrier resin, wherein m, n, o and p independently from each other are 2 or 3; q is 1 or 2; X is —S— or >N(˜); and A is >CH(CH20-) when X is —S—, and A is —CH2— when X is >N(˜); wherein — represents a bond, optionally via a linker, to the carrier resin; and > denotes bonds within Formula I; and wherein the carrier resin is chosen from the group consisting of polystyrene comprising polyethylene glycol moieties, alkylidene-polystyrene comprising polyethylene glycol moieties, crosslinked polyvinyl alcohol, and polyacrylates. The present disclosure also relates to scavengers for use as a medicament, to a composition and a kit comprising such a scavenger, to a method for removing one or more heavy metal compounds from a body fluid and to a method of preparation of a compound according to Formula (I).

The present disclosure relates to scavengers comprising a compound according to formula I coupled to a carrier resin, wherein m, n, o and p are, independently of each other, 2 or 3; q is 1 or 2; x is-S-or gt; n (-); and when X is-S-, A is gt; cH (CH2O-), and when X is gt; when N is (-), A is-CH2-; wherein-represents a bond, which bond is optionally linked to the carrier resin via a linker; and gt; representing a bond within Formula I; and wherein the carrier resin is selected from the group consisting of a polystyrene comprising a polyethylene glycol moiety, an alkylene-polystyrene comprising a polyethylene glycol moiety, a cross-linked polyvinyl alcohol, and a polyacrylate. The present disclosure also relates to scavengers for use as a medicament, compositions and kits comprising such scavengers, methods for removing one or more heavy metal compounds from bodily fluids, and methods of preparing compounds according to Formula I.

The application adopts the innovative extractant of main extractant EDTA (ethylene diamine tetraacetic acid), auxiliary extractant sodium persulfate and ammonium chloride, carries out water phase extraction on sewage sludge incineration ash, electronic plant sewage filter residue and municipal waste incineration bottom ash, and the extraction efficiency is higher than the sum of exchangeable part, reducible part and oxidizable part in the standard BCR extraction method, only leaving the heavy metal part extracted by digestion method in the last residue, fully cleaning the solid waste polluted by heavy metals, and providing basic demonstration for further application instead of landfill; the application adopts the innovative method of acidification quick freezing, rapid precipitation of main precipitant EDTA, thawing solid-liquid separation, can separate the chelating agent and heavy metal after chelation very quickly and effectively, and recycle the chelating agent; combined with sequential precipitation and coprecipitation, high-purity heavy metal compounds are separated, which are important industrial raw materials; the amount of consumed acid and alkali and other chemical products is less, the cost is lower, and the application prospect is wide.

According to the online analyzer for the heavy metals in the water, a sample injection module is provided with a plurality of valve ports, a plurality of required containers can be conveniently communicated, each valve port can be independently opened or closed, and any required liquid can be conveniently and selectively pumped. Through the first pumping direction and the second pumping direction of the pumping module, liquid in any container can be conveniently pumped to the absorbance detection module or discharged from a waste liquid valve port after being metered. The whole detection process is simple in operation steps, accurate in metering and timely in pumping, and can solve the problems that when the concentration of the heavy metal compound is measured by an existing laboratory method, manual operation is tedious, the number of detection samples is small, the detection time period is long, the cost is high, and the heavy metal compound is prone to loss, so that the accuracy of a detection result is poor, and reproducibility is poor.

The invention provides a river sediment heavy metal environment-friendly separation method and system based on multi-stage combined treatment. The method comprises the steps that a pretreatment module achieves sediment gradient layered screening through a vibration screening device, and ferromagnetic heavy metal is separated in combination with a magnetic separation composite device; the main body treatment module adopts an electrodynamics-micro-nano bubble coupling reaction tank, a colloid structure is broken through a micro-nano bubble cavitation effect, migration of non-ferromagnetic heavy metal ions is accelerated in combination with a directional electric field, and a coordination agent is added to enhance a separation effect; the deep treatment module realizes deep capture of heavy metal ions and heavy metal compounds through a double-layer adsorption medium of a modified biochar composite material and sulfydryl modified diatomite. According to the system, through physical screening, magnetic separation, electrochemistry and adsorption technologies, heavy metals in different forms are precisely separated step by step, and the overall treatment efficiency and the heavy metal removal rate are remarkably improved.

The invention discloses a high-temperature-resistant solid-liquid hybrid capacitor and a preparation method thereof. The preparation method of the capacitor comprises the steps of element winding, formation repairing, drying, conductive polymer dispersion liquid impregnation, thermal polymerization, electrolyte impregnation, packaging and aging. The core of the conductive polymer dispersion liquid is that the conductive polymer dispersion liquid comprises a polymer monomer, doped acid, nano copper oxide and sodium salt; the electrolyte comprises chloride, sulfate, inorganic polymer ferric salt and a heavy metal compound as additives. Through the synergistic enhancement of the nano copper oxide and the sodium salt in the solid electrolyte layer and the repair protection of the electrolyte additive, the performance stability of the solid-liquid hybrid capacitor in a high-temperature environment of 150 DEG C or above is effectively improved. After the capacitor prepared by the method is aged for 2000 hours in a high-temperature environment of 150 DEG C, the capacitance attenuation rate can be controlled within-1.5%, and the capacitor shows excellent high-temperature stability and reliability and is suitable for the fields of aerospace, automotive electronics and the like which have harsh requirements on high-temperature performance.

A method for producing pure phosphate includes the step (S10) of supplying a strip solution, which is an aqueous solution of one of monoammonium phosphate and monopotassium phosphate, on which stripped phosphate is carried from a feed solution containing phosphoric acid contaminated with heavy metals and iron. A base is added to the separated strip solution (S20) to raise the pH to 2-5.5 and form a heated solution to precipitate compounds containing iron and phosphate. A precipitating agent is added to precipitate heavy metals (S30). The precipitated compounds containing iron and phosphate and the precipitated heavy metal compounds are separated (S40). The heated filtration solution is then cooled to a cooled solution (S50) to precipitate the phosphate compound. The precipitated phosphate compound is removed from the cooled solution (S60). The cooled solution is recycled for use as the input strip solution in the stripping operation (S70). A system for producing pure phosphate is also disclosed.