8 results about "Heavy metal compound" patented technology

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.

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 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.

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.