115 results about "Sodium bismuthate" patented technology

The present invention provides grease which prevents frictional wear on a lubricating surface and excellent in performance of preventing occurrence of flaking, heat-resistant performance, and long-term durability, a grease-enclosed rolling bearing, a constant velocity joint, and rolling parts. Grease is composed of base grease, essentially containing a thickener, to which at least 0.01 to 15 wt % of one substance selected from among bismuth and inorganic bismuth compounds is added. The inorganic bismuth compounds are at least one inorganic bismuth selected from among bismuth sulfate, bismuth trioxide, bismuth carbonate, and sodium bismuthate. The above-described grease is used for the rolling bearing and the constant velocity joint. A coating film of at least one substance selected from among the bismuth and the inorganic bismuth is formed on surfaces of the rolling parts.

The invention discloses a method for rapid degradation of triphenylmethane dye waste water. The method firstly removes impurities by a grill, stands for precipitation and regulates pH, wherein, the pH value of the triphenylmethane dye waste water is controlled to be about 7-10; the waste water is introduced into a simple reaction container, then a mixture consisting of sodium bismuthate and silver nitrate is added, the multi-phase uniform mixing reaction is kept under the action of stirring, the temperature of the dye waste water during the process is kept at room temperature, the pressure is normal pressure, and the waste water is discharged. The treatment method can high-efficiently degrade triphenylmethane dye which is typically difficult to biodegrade, the catalytic reaction can be realized without the use of any light source or other external energy, such as microwave and the like, and the treatment method has very low requirements on equipment, less energy consumption, low operation cost, convenient operation and no secondary pollution, thereby being the method which can realize the degradation at the room temperature.

The present invention provides a grease capable of preventing wear on a lubricated surface, excellent in deflection prevention performance, heat resistance, and long-term durability, and a rolling bearing, a constant velocity coupling, and a rotating part filled with the grease. The grease is prepared by adding at least one substance selected from bismuth and inorganic bismuth in an amount of 0.01 to 15% by weight relative to the total amount of grease to a base grease prepared by blending at least a thickener with a base oil. Inorganic bismuth is at least one inorganic bismuth selected from bismuth sulfate, bismuth trioxide, bismuth carbonate and sodium bismuthate, the above-mentioned grease is used for rolling bearings and constant velocity couplings, and the rotating parts are formed on their surfaces selected from bismuth and inorganic bismuth A coating of at least one substance.

The invention discloses application of sodium bismuthate in rapidly degrading organic dye waste water and a degradation method. The method comprises the following steps: removing impurities of the organic dye waste water by grates, standing and settling the waste water; and adjusting pH value to between 7 and 10; introducing the waste water into a reaction vessel, adding NaBiO3 into the reaction vessel, irradiating the mixture by visible light, reacting the mixture under stirring, and discharging the waste water after being processed; and when the concentration of the organic waste water exceeds 130 mg / L, diluting the waste water, wherein the selected sodium bismuthate is a commercial article and can be directly purchased; the adding concentration is 0.1 to 2 g / L economically; and when the adding concentration exceeds 3g / L, excessive solid particles disperse illumination to reduce the photolysis efficiency. The method has strong applicability to processing the dye waste water and can be performed at normal temperature. The catalytic oxidizer has strong oxidation capability, can oxidize most organic dyes, has high degradation speed, obviously reduced TOC and low cost, and is easy for mass production and use.

The invention relates to a bismuth oxyhalide photocatalyst. According to a method for preparing bismuth oxyhalide photocatalyst, sodium bismuthate is used as the bismuth source, and sodium halide or potassium bromate or cetyl trimethyl ammonium chloride or halogenated cetylpyridinium or tetrabutyl ammonium halide is used as the halogen source; the halogen source is added into deionized water and mixed for 20 minutes for dissolution under the ultrasonic condition, and then sodium bismuthate is added into the halogen source for pH adjustment; the mixed solution is put into a reaction kettle for reaction, and the halogen source is marked as follows according to the bromine source: sodium halide (BiOBrNaBr), potassium bromated (BiOBrKBrO3), cetyl trimethyl ammonium chloride (BiOBrCTAB), halogenated cetylpyridinium (BiOBrCPB) and tetrabutyl ammonium halide (BiOBrTBB). The bismuth oxyhalide photocalyst is applied to visible light sensitization or degradation of rhodamine B (RhB) and salicylic acid (SA); the bismuth oxyhalide photocalyst has good stability and photocatalytic activity, and meanwhile, the preparation process is simple and the cost is low.

The invention discloses a liquid nano-catalysis desulfurizer for a new dry process cement kiln and a preparation method thereof. The liquid nano-catalysis desulfurizer, which is prepared from nano cerium oxide, nano thorium oxide, nano titanium oxide, nano nickel oxide, nano calcium oxide, nano calcium carbonate, carbomite, potassium permanganate, sodium bismuthate, AEO9, octyl phenol polyoxyethylene ether, PEG 200, polymaleic acid, fatty acid polyglycol ester, and diethylene glycol; the allowance is water. In the technical scheme, europium oxide, ferric acetylacetonate and polyoxyethylene ether are added. The desulfurization degree of the liquid nano-catalysis desulfurizer is 100%; sulfur dioxide in smoke gas can be discharged to zero.

The invention belongs to the field of soil remediation and discloses a compound soil remediator and a preparation method thereof. The compound soil remediator comprises the following components in parts by weight: 13-24 parts of polyamide fibers, 5-13 parts of chitosan, 9-20 parts of sodium polyacrylate, 8-17 parts of polyethylene oxide, 5-14 parts of quicklime, 7-12 parts of magnesium fluosilicate and 4-10 parts of sodium bismuthate. The preparation method comprises the following steps: weighing the polyamide fibers, chitosan, sodium polyacrylate, polyethylene oxide, quicklime, magnesium fluosilicate and sodium bismuthate; and after uniformly mixing various components of the soil remediator, sealing to prepare the compound soil remediator.

The invention discloses a chemical oxygen demand (COD) degradation agent for removing sulfamide from industrial wastewater in the field of environment sewage treatment. The degradation agent is formed by compounding the following components in percentage by mass: 70 to 85 percent of inorganic strong oxidant, 1 to 5 percent of catalyst and 10 to 29 percent of genetic engineering bacteria enzyme, wherein the inorganic strong oxidant is one or two of sodium chlorate, potassium ferrite, ammonium persulfate and sodium bismuthate; the catalyst is one of nickel oxide, copper oxide, titanium oxide and lead oxide; the genetic engineering bacteria enzyme is one or two of cyclic amide hydrolase, lignocellulose hydrolase, protein hydrolase, organic phosphorus hydrolase and amylase; and the wastewater is added with 1 to 5 percent of degradation agent and continuously stirred, so that the concentration of the sulfamide in the wastewater is reduced to below 0.5mg / L from 1,000mg / L, and the removal rate is more than 99.9 percent. The degradation agent is easy to use and cannot produce secondary pollution; raw materials are readily available; and precipitates are not produced.

The invention relates to an efficient heavy metal soil restoration agent. The efficient heavy metal soil restoration agent is prepared from the following raw materials in parts by weight: 3-7 parts of phosphate compounds, 9-16 parts of straw, 3-7 parts of medical stone, 12-20 parts of polyamide fiber, 5-8 parts of sodium bismuthate, 6-13 parts of sodium sulfide, 1.2-2.5 parts of Bacillus pasteurii spore powder, 6-25 parts of turf powder, 0.3-0.6 part of powdery bacterial powder carrier, 0.5-1.2 parts of fruit residues, 0.1-0.25 part of saw dust, 3-6 parts of calcium oxide and 2-5 parts of a magnesium-containing preparation. By virtue of the efficient heavy metal soil restoration agent, polluted soil can be effectively restored in a short time, heavy metals are inactivated, the soil restoration function is comprehensive and strong, and the soil environment can be effectively improved.

The invention discloses a preparation method of a lanthanum bismuthate nanorod, and belongs to the technical field of nanometer material preparation. The method is concretely characterized in that firstly, sodium bismuthate and lanthanum acetate are uniformly mixed; then, sodium bismuthate and lanthanum acetate mixed powder is put into a high-temperature region of an alundum tube reaction container; an alumina wafer is put into a low-temperature region of the alundum tube reaction container; the reaction container is sealed; the high-temperature region is heated to be 1100 to 1300 DEG C; the low-temperature region is heated to be 100 to 200 DEG C; heat insulation is performed for 0.5 to 3h; the alumina wafer containing white sediments on the surface is obtained; then, the alumina wafer isfixed in the middle of the reaction container; the sodium bismuthate, the lanthanum acetate and water are mixed and are then put into the reaction container to be sealed; heat insulation is performedfor 24 to 72h at the temperature of 300 to 500 DEG C. The two-step reaction process is used; the preparation process is simple; the control is easy; the obtained lanthanum bismuthate nanorod has goodapplication prospects in the aspects of photocatalysis, adsorption, lithium ion batteries, solid-oxide fuel batteries and the like.

The invention discloses an explosion-proof glass material and a preparation method thereof. The above-mentioned explosion-proof glass material is made of the following components by weight: 75-80 parts of silicon dioxide, 8-11 parts of boron oxide, 2-3 parts of silicon phosphoric acid 1-2 parts of methyltriacetoxysilane, 1-1.5 parts of magnesium aluminosilicate, 1-1.5 parts of sodium metabismuth, 0.5-0.9 parts of cerium nitrate hexahydrate, 0.5-0.8 parts of rutile, tripolyphosphoric acid 0.05-0.5 part of sodium, 0.02-0.4 part of lead oxide and 0.02-0.05 part of polydimethylsiloxane diquaternary ammonium salt. The invention also provides a preparation method of the explosion-proof glass material.

The invention relates to a visible-light nanometer catalyst and a preparation method thereof. The visible-light nanometer bismuth-magnesium composite-oxide photo-catalyst is characterized in that the method includes the following steps: 1) magnesium salt and sodium bismuthate are selected according to the mol ratio of 4:1 to 8:1, and the sodium bismuthate is added into the magnesium salt solvent in the form of solid powder and evenly mixed to obtain a suspension; 2) the suspension is transferred into a stainless reaction kettle sheathed with polytetrafluoroethylene, and deionized water is added according to the filling degree of hydrothermal reaction of being 70 percent to 80 percent and maintained for 2 hours to 24 hours under 120 DEG C to 180 DEG C; 3) after the temperature of the kettle is cooled to room temperature, products after reaction are taken out, centrifugally washed by the deionized water and anhydrous alcohol respectively for 1 time to 5 times, and positioned in a constant temperature oven to be dried for 2 hours to 10 hours under 60 DEG C to 80 DEG C so as to obtain the visible-light nanometer bismuth-magnesium composite-oxide photo-catalyst which has excellent visible-light catalytic activity, good stability and promising application prospect.

The invention discloses a nickel-cobalt lithium aluminate material coated with a sodium-based oxidizing agent and a preparation method thereof. According to the method, the surface of the nickel-cobalt lithium aluminate material is coated with a layer of sodium-based oxidizing agent, the sodium-based oxidizing agent is one or more of sodium peroxide, sodium bismuthate and sodium antimonate and hasstrong oxidability, in the sintering process, the oxidizing agent is partially diffused into crystal nuclei of the material, the oxidation of Ni<2+> is promoted, the lithium-nickel synchysis is reduced, a coating layer with a proper thickness is formed on the surface of the material by other part of the oxidizing agent, the material is prevented from being corroded by electrolyte in the chargingand discharging processes, and the cycling stability of the material is improved.

The invention discloses preparation of a series of efficient composite materials used for hydrogen generation by hydrolysis. According to the composite materials, a material which is used for hydrogen generation by hydrolysis and has excellent performances is obtained by adding a small amount of sodium bismuthate into an aluminum substrate. Based on the Al-NaBiO3 composite material, a small amount of NaCl or KCl is added to improve oxidation resistance of the composite materials in air at room temperature. A preparation method comprises steps of weighing various raw material powder needed according to a ratio and adding into a steel ball milling jar, performing high-speed ball-milling in a QM-3SP2 planetary ball mill, and feeding argon into the ball milling jar for protection to obtain the hydrogen generating materials with uniform components and high activity. According to the composite materials and the preparation, the preparation technology is simple; the cost for the raw materials is low; and the composite materials have high energy density, high hydrogen releasing rate and good oxidation resistance in air, and are suitable for applications in real-time vehicle-loading hydrogen supplying, and the like.

A disclosed method for rapidly deeply degrading organic dye wastewater with low cost comprises: (A) removing impurities with grids, standing for precipitating, adjusting the pH value to 6-11; (B) introducing wastewater into a reaction container, adding bismuth silver oxide synthesized from sodium bismuthate and silver nitrate, performing a multi-phase homogeneous mixing reaction with stirring at room temperature and normal pressure, after the wastewater is basically decolored, centrifuging and discharging the wastewater; and (C) introducing the last-stage water into another reaction container, adding sodium bismuthate with an amount of 0.75-2 g / L, reacting with stirring under the irradiation of sunshine, and discharging the processes wastewater, wherein the bismuth silver oxide is synthesized from sodium bismuthate and silver nitrate with a weight ratio of (2.5-3.5):1. According to the method, a two-step combination method which means combination of sodium bismuthate rapid oxidation and sodium bismuthate catalyzed sunshine mineralization is employed for processing dye wastewater, and thus the purpose of performing decoloring, degradation and mineralization on dye wastewater in short time is realized; the synthesis ratio of bismuth silver oxide is optimized; and by employing sunshine for deep degradation, the cost is relatively low and also the photocatalysis efficiency of sodium bismuthate is improved.

The invention provides an iron sodium bismuthate-graphene visible-light-driven Fenton-like composite catalyst used for removing nonyl phenol and a preparation method thereof. The composite catalyst is characterized in that the composite catalyst is prepared by compounding iron sodium bismuthate and graphene, wherein the mass content of iron sodium bismuthate FexNayBiO3 is 90 to 99.5% while the mass content of graphene is 10 to 0.5%. According to the invention, NaBiO3 (sodium bismuthate) is used as a basic catalyst and elemental Fe is doped to endow the basic catalyst with Fenton-like catalysis performance, so a nanometer catalyst, i.e., iron sodium bismuthate, with both visible-light-driven and Fenton-like catalysis performance is prepared; and then iron sodium bismuthate is loaded on micrometer graphene oxide, and graphene oxide in the compound is reduced into graphene through a hot reduction method so as to obtain the final product, i.e., the iron sodium bismuthate-graphene visible-light-driven Fenton-like composite catalyst. Under irradiation by visible light, nanometer FexNayBiO3 produces strong-oxidability substances like hydroxyl radicals under photocatalysis; graphene can improve affinity between the catalyst and a substrate, substantially strengthen adsorption of NP and enhance interfacial reaction capability in virtue of pi-pi interaction and hydrophobic action force, and graphene has excellent electron transport performance, which can promote separation and transfer of photogenerated holes and electrons on a heterophase boundary and further improve NP oxydative degradation capability.

The invention discloses a preparation method of a bismuth (III) trioxide-bismuth oxycarbonate nano complex through room temperature solid phase chemical reactions. According to the preparation method,solid phase raw materials namely sodium bismuthate dihydrate and sodium hydrogen sulfite are mixed, then ball-milling solid phase reactions are carried out in the presence of CO2, and finally the reaction product is washed, centrifugally separated, and dried to obtain the target product namely a Bi2O3-Bi2O2CO3 nano complex. Solids are mixed, the raw materials are ball-milled at room temperature to carry out solid phase reactions, the preparation process is simple and is easy to control, the agglomeration of product particles is largely reduced; a redox agent, a template agent, or a solvent isnot needed, the product purity is improved therefore, the green synthesis is realized, and the method is suitable for large scale production.

The invention discloses a preparation method of a bismuthyl carbonate-graphene oxide nanocomposite. According to the preparation method, after solid-phase raw materials of sodium bismuthate dihydrate,oxalate dihydrate and graphene oxide nanosheets are mixed, a ball-milling solid-phase reaction is performed; an obtained product is subjected to washing, centrifugal separation and drying to obtain atarget product Bi2O2CO3-GO nanocomposite. According to the invention, solid mixing is adopted; the raw material is subjected to the room-temperature ball-milling solid-phase reaction; the preparationprocess is simple; the preparation method is easy to control and aggregation of product particles can be greatly reduced; addition of an oxidation-reductant, a template agent and a solvent is avoided, so that purity of the product is improved, and the preparation method accords with the requirement for material green synthesis and is also suitable for large-scale production.

A barium sodium bismuthate as photocatalyst response to visual light for catalytic degradation to toxic and harmful chemical substances is prepared from sodium bismuthate and Ba salt through adding sodium bismuthate to the solution of Ba salt, stirring, hydrothermal reaction, washing and baking. It has high hotocatalytic activity for UV, visual light and natural light.

The invention discloses a preparation method of polyaniline compounded zinc bismuthate nano-rods, and belongs to the technical field of preparation of functional materials. According to the preparation method, sodium bismuthate, zinc acetate and polyaniline are used as raw materials, and argon is used as carrier gas. The preparation method comprises the following specific steps: uniformly mixing the sodium bismuthate with the zinc acetate at first; and then placing mixed powder of the sodium bismuthate and the zinc acetate in a high-temperature region of an alundum tube reaction container, placing the polyaniline in a low-temperature region of the alundum tube reaction container, sealing the reaction container, heating the high-temperature region to the temperature of 1,200-1,400 DEG C, heating the low-temperature region to the temperature of 200-300 DEG C, and insulating for 12-24 hours, wherein the flow speed of the argon is 100-200 cm<3> / min. A preparation process is simple and is easy to control, and the polyaniline compounded zinc bismuthate nano-rods have good application prospect in the fields of electronic devices, optical devices, electrochemical devices, lithium ion batteries and the like.

The invention discloses a sodium bismuthate / epoxy resin / glass fiber composite material, a preparation method thereof and an application method for the composite material in degradation of organic waste water. The preparation method comprises the following steps: soaking sodium bismuthate powder in an aqueous solution of a silane coupling agent for treatment, then taking out the sodium bismuthate powder and drying the sodium bismuthate powder for subsequent usage; adding methyl tetrahydrophthalic anhydride into an epoxy resin and carrying out uniform mixing so as to obtain an epoxy resin glue solution; and mixing the treated sodium bismuthate with the epoxy resin glue solution, carrying out ultrasonic dispersion, coating an obtained mixture on glass fiber cloth, folding the glass fiber cloth three to five times in a die, carrying out curing, cooling and demolding and cutting the glass fiber cloth to a certain shape and a certain size. The application method comprises the following steps: uniformly putting the composite material with an appropriate shape and an appropriate size between jacket layers of a glass tube reactor and installing a visible light lamp at the center of an inner tube; allowing organic waste water to enter into a glass jacket, pass through the composite material and undergo a visible light catalytic degradation reaction with sodium bismuthate under irradiation by visible light. The preparation method has the advantages of low requirements on equipment, simple procedures, low energy consumption and convenience in operation; and the composite material is capable of degrading organic waste water in a short period of time.

The invention discloses a method for synthesizing bismuth trioxide-cuprous oxide nano-composite through a mechanical milling thermal treatment two-step method. The method comprises the following steps: mixing solid phase raw material sodium bismuthate dihydrate, basic cupric carbonate and oxalic acid dihydrate, performing mechanical milling solid phase reaction to acquire Bi2O2CO3-Cu2(OH)2-2x(CO3)xC2O4 compound precursor; and performing thermal treatment on the precursor to obtain the Bi2O3-CeO2 nano-composite. Solid mixing, the raw material room-temperature milling solid-phase reaction and thermal treatment two-step method are adopted, the preparation process is simple and easy to control, and the agglomeration of product particles can be greatly reduced; an operation of furthermore adding oxidation reducing agent, the template agent and the solvent is avoided, the product purity is improved, the green synthesis requirement of the material is satisfied, and the method is suitable forthe large-scale production.

A preparing method of a sodium bismuthate based visible light catalysis paper material is provided. The method includes 1) preparing sodium bismuthate, 2) preparing a plant fiber suspension, and 3) preparing the sodium bismuthate based visible light catalysis paper material. The sodium bismuthate that is a photocatalyst and has a visible light catalysis function is adopted as a base catalyst and is loaded on plant fibers. The plant fibers are a good catalyst carrier and can avoid agglomeration of sodium bismuthate nanometer particles, thus ensuring adsorption and catalytic activity. The methodis simple in process and convenient to operate, and efficient degradation and mineralization of organic pollutants can be achieved by utilizing strong adsorption and catalysis properties of the catalyst.

The invention belongs to the field of bactericides, and particularly relates to application of bismuth trioxide as a bactericide. The bismuth trioxide is prepared by adopting one of the following modes: a method I, dropwise adding a hydrochloric acid aqueous solution into a sodium bismuthate aqueous solution at room temperature under an ultrasonic condition until the solution is acidic, drying the obtained precipitate, heating and reacting in a muffle furnace, and cooling to obtain nano bismuth trioxide; a second method comprises the following steps: at room temperature, dropwise adding a nitric acid aqueous solution into a sodium bismuthate aqueous solution until the solution is acidic, drying the obtained precipitate, carrying out staged heating reaction in a tubular furnace, and cooling to obtain nano bismuth trioxide; and a third method comprises the following steps: putting metal bismuth into deionized water, and after laser irradiation, removing the metal bismuth to obtain the water-phase dispersed nano bismuth trioxide. Compared with commercially available micron-sized bismuth trioxide, the inorganic metal oxide bismuth trioxide prepared by the three methods provided by the invention has good antibacterial activity, and can effectively kill gram-negative bacteria and gram-positive bacteria, including drug-resistant strains.

The invention discloses a new preparation method of S-pantoprazole sodium. The method comprises the following steps: 1) performing condensation of 5-difluoro methoxy-2-mercapto-1H-benzimidazole and 2-chloromethyl-3,4-dimethoxy pyridine hydrochloride in the presence of sodium hydroxide to obtain II; 2) performing catalytic oxidation of II with sodium bismuthate as an oxidizing agent and chiral bipyridine methyl amide as a chiral ligand, and in the presence of alkoxy titanium to obtain S-pantoprazole III; 3) performing salification of III and sodium hydroxide to obtain S-pantoprazole sodium I. The method is simple in operation, mild in reaction, and high in yield; the obtained product is high in chemical purity and optical purity, and is convenient for industrial production.

The invention provides a full-spectrum response bismuth oxide / silver phosphate / carbon nanotube sponge composite photocatalyst for drilling waste liquid treatment and a preparation method and application thereof. The preparation method comprises the steps of adding carbon nanotube sponge into an organic alcohol-water solution of silver nitrate, adding a disodium hydrogen phosphate solution, carrying out a hydrothermal reaction process on the obtained mixed solution, carrying out filtering, washing and drying to obtain a silver phosphate / carbon nanotube sponge composite material, adding sodium bismuthate into a sodium hydroxide solution, then adding the silver phosphate / carbon nanotube sponge composite material, carrying out a hydrothermal reaction process and filtering, washing and freeze-drying to obtain the product. The bismuth oxide / silver phosphate / carbon nanotube sponge three-dimensional composite photocatalyst prepared by the method has the advantages of full-spectrum response, high photocatalytic activity, low photo-induced electron-hole recombination rate and high non-polar substance adsorption and degradation capacity. Under the irradiation of visible light and near-infrared light, the method is used for in-situ treatment on organic pollutants such as polycyclic aromatic hydrocarbon in the drilling waste liquid.

The invention discloses a preparation method of a manganese-doped sodium-ion battery positive electrode material, which comprises the following steps: dissolving one or two of antimony trioxide and bismuth trioxide with acid, adding a divalent manganese salt to prepare a mixed metal salt solution, adding the mixed metal salt solution into an alkaline oxidant solution, and reacting to obtain the manganese-doped sodium-ion battery positive electrode material. And carrying out solid-liquid separation to obtain a solid material, drying the solid material, mixing the solid material with a sodium source, and sintering to obtain the manganese-doped sodium ion battery positive electrode material. The antimony or bismuth element is doped, the skeleton structure of the material is enhanced, the phase change of the material in the charge-discharge process is inhibited, the specific capacity, the cycle performance and the rate capability of the material can be obviously improved, the mixed metal salt solution is dropwise added into the excessive alkaline oxidant solution, manganese ions are oxidized into manganese dioxide, and the specific capacity, the cycle performance and the rate capability of the material are improved. Antimony and bismuth are co-precipitated with manganese dioxide in the form of hexahydroxy sodium antimonate or sodium bismuthate, so that the uniformity of doped elements of the material is ensured, and atomic-scale mixing of the elements is realized.

The invention discloses a heavy metal soil remediation agent and a preparation method thereof. The heavy metal soil remediation agent is composed of the following formula ingredients in parts by mass: 10-20 parts of activated carbon fibers, 5-7 parts of a phosphate compound, 4-6 parts of polyamide fibers, 5-6 parts of sodium bismuthate, 14-16 parts of aminopolycanboxylic acid, 16-18 parts of a bio-emulsifier, 6-10 parts of sodium lignin sulfonate, 6-8 parts of organic acid, 2-4 parts of organic matters and 3-5 parts of sodium sulfide. The heavy metal soil remediation agent disclosed by the invention is reasonable in formula, the preparation method is simple, multiple heavy metal pollutants in soil can be effectively reduced, the soil air permeability can be improved, the growth environment of crops can be improved, and the heavy metal soil remediation agent is environment-friendly and green.

The invention relates to a method for treating organic wastewater by using sodium bismuthate and a plasma. The method comprises the following steps: adding an agent of sodium bismuthate into the organic wastewater, mixing uniformly, adding the organic wastewater into a plasma discharge device, and treating the organic wastewater. The method provided by the invention integrates the discharge plasma technology with the photocatalysis of sodium bismuthate and can be used for treating wastewater rapidly and effectively. By inducing sodium bismuthate to generate active particles by using streamer which is generated in the process of stopping discharging by using an electric arc and a medium as a light source, the content of active components in a reaction system can be increased, and the oxidative decomposition and mineralization efficiency of organic pollutants can be improved.