725results about How to "Wide pH range" patented technology

The present invention relates to no-phosphate corrosion and scale inhibitor and its application. The no-phosphate corrosion and scale inhibitor consists of polyaspartic acid and / or polyepoxy succinic acid 10-20 wt%, polymaleic anhydride 20-30 wt%, copolymer of acrylic acid and 2-acrylamido-2-methyl propenyl sulfonic acid 15-20 wt%, zinc salt 3-5 wt%, natural organic high molecular compound 5-12 wt%, molybdate 5-8 wt%, and other components 5-20 wt%. It has excellent corrosion retarding performance, high scale inhibiting performance and environment friendship.

A complex metal oxide used as an adsorbent for removing fluorine from water is prepared from the transition metal chosen from Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn, aluminum and RE metal chosen from Ce and La in the mole ratio of (0.5-1.5): (2-6): (0.5-1.5) through dissolving them in water to become aqueous solution, dropping alkali solution to make its pH=9.0-9.5, laying aside, centrifugal washing and separating by deionized water, drying, and grinding.

The invention discloses a preparing method of a manganese oxide-charcoal composite adsorbent, which comprises following steps: (1) air-drying or drying a biomass raw material, pulverizing into powder and uniformly mixing for standby; (2) taking potassium permanganate or sodium permanganate as a pre-treating agent, and performing pretreatment on the biomass raw material by adopting an equivalent-volume impregnation method; (3) drying, pyrolyzing and carbonizing the pretreated material to prepare the composite adsorbent material; (4) soaking the obtained composite adsorbent material with inorganic acid, and washing and drying to obtain the manganese oxide-charcoal composite adsorbent finished product. The method is simple, the prepared composite adsorbent is suitable for an adsorption method as an adsorbent for treating heavy metal ion-containing waste water, and has an advantage in the aspect of treating the acid heavy metal ion waste water particularly. The adsorbent can also serve as a conditioner for soil polluted by heavy metal ions, and achieves an action of controlling the absorption of plants to heavy metal ions by adsorbing the heavy ion ions after being applied into the soil.

The invention discloses a preparation method of a lignin-based dithiocarbamate heavy metal ion capture agent. The method comprises the steps of: (1) adding water into lignin and stirring them, adding an alkaline conditioning agent to adjust the pH to 9-11, then adding an oxidizing agent, conducting heating to raise the temperature to 80-90DEG C for reacting for 1-2 hours; (2) adding an amination reagent, maintaining the reaction temperature at 80-90DEG C, then adding formaldehyde to react for 5-6 hours; (3) cooling the solution to room temperature, adjusting the pH value to 10-11, then adding carbon disulfide to perform an esterification reaction for 4-5 hours at 40-45DEG C; and (4) adding a modifier for reacting for 1-2 hours, then carrying out pumping filtration, and then conducting washing 2-3 times with water and absolute ethyl alcohol, thus obtaining a solid product, i.e. the lignin-based dithiocarbamate. The lignin-based dithiocarbamate heavy metal ion capture agent provided in the invention has the advantages of simple preparation process, low production cost, excellent performance, adaptability to treatment of various heavy metal ion polluted wastewater, good stability, and wide applicable range.

The invention provides a composite low-phosphorus corrosion and scale inhibitor and application thereof. The composite low-phosphorus corrosion and scale inhibitor is prepared from a corrosion and scale inhibitor A and a corrosion and scale inhibitor B, wherein the corrosion and scale inhibitor A is prepared from 20-40 parts of polyepoxysuccinic acid (PESA), 20-40 parts of sodium gluconate and 20-60 parts of water; and the corrosion and scale inhibitor B is prepared from 10-25 parts of hydroxypropyl methacrylate (HPMA), 10-25 parts of acrylic acid / 2-acrylamido-2-methylacrylsulfonic acid copolymer (AA / AMPS), 5-10 parts of 2-phosphonobutyl-1,2,4-tricarboxylic acid (PBTCA), 10-25 parts of zinc salt, 1-2 parts of fluorescent tracer and 13-64 parts of water. The technical scheme is as follows: the corrosion and scale inhibitor A and the corrosion and scale inhibitor B in a weight ratio of 1:2 are compounded with water. The composite low-phosphorus corrosion and scale inhibitor has excellent corrosion and scale inhibition effects, and thus, the phosphorus content in the product is low, thereby reducing the phosphorus discharge and having favorable environmental protection performance.

The invention relates to a dye acidic waste water treatment method and device. The method comprises steps as follows: separately collected dye waste acid is subjected to distilling concentration, neutralization, adsorption, micro-electrolysis, coagulative precipitation, activated carbon column adsorption, concentrating crystallization and separation through an automatic control system to prepare sodium (ammonium) sulfate or sodium (ammonium) chloride; and the distilled water is subjected to advanced treatment to reach the industrial reuse water standard, enters an industrial water storage tank, and is circulated to the dye production procedure. The method and device are especially suitable for industries generating abundant waste sulfuric acid and waste hydrochloric acid, such as production of dyes, titanium white and the like. The abundant waste sulfuric acid and waste hydrochloric acid generated in the production process can be utilized to prepare sodium (ammonium) sulfate or sodium (ammonium) chloride, thereby recycling acidic waste water, and changing wastes into valuable substances; and meanwhile, the distilled water can be circulated into industrial production after advanced treatment, thereby reducing the waste water discharge.

The invention discloses a magnetic Co3O4-C nano material and a preparation method thereof as well as application of the magnetic Co3O4-C nano material as a catalyst for activating peroxymonosulfate to wastewater treatment and belongs to the technical field of water pollution control. The method takes a cobalt metal-organic framework compound as a precursor, and the precursor is calcined at a high temperature in a certain atmosphere to finally obtain the magnetic Co3O4-C nano material. A porous carbon component in the material can be used as a carrier of metal oxide so that catalytic sites are uniformly distributed, and pollutants in a water body can be effectively enriched so that the system degradation efficiency is improved; and a magnetic Co3O4 component in the material can be used as a heterogeneous catalyst for efficiently activating peroxymonosulfate to generate free radicals for degrading the pollutants in the water body. The method has the characteristics of high efficiency and convenience, wide pH applicable range, capability of recycling the catalyst through an external magnetic field, good circulating usability and environmental friendliness, and has an extremely great potential to actual treatment application of organic wastewater.

The invention relates to a method for preparing an active coal ash phosphoric adsorbent, which comprises the following steps: a) mixing the coal ash and the basic activating agent evenly in the high-speed batch mixer, b) roasting and activating them in the calcining furnace, c) putting them into the acidproof retort after cooling and adding acidic modifier into the retort, d) heating them to react, then drying and grinding the materials and getting the powdered phosphoric adsorbent with high active. Said invention uses the industrial waste coal ash as the raw material, and by means of the low-cost activating agent and modifier it can dissolve out the material with high absorptive in the coal ash, and the prepared absorbent has high dephosphorize effect.

The present invention belongs to the field of water treatment technology. In the concrete, it is a technique capable of utilizing chloride or nitrate of rare earth element (for example lanthanum and zirconium, etc) or mixed solution of both them to treat clay to obtain a high-effective phosphorus-fixing material, and said phosphorus-fixing material can be used for fixing water bloom of fresh water, lake bottom deposits and phosphorus in river.

The invention relates to an immobilized enzyme biocatalyst and the manufacturing method and application. The immobilized enzyme biocatalyst regards tubular hollow silica dioxide dielectric hole material as a carrier external surface, inner surface and micropore in the wall of which are fixed biological enzyme molecule. The method includes physical adsorption cast investment or chemical coupling / crosslinking method; the biocatalyst is provided with good enzyme dispersibility and high carrying quantity, high recovery ratio of enzymatic activity, low enzyme flow rate. The invention can fix penicillin acylating enzyme, glucose oxidase, peroxidase, cytase and so on, which also can be used for removing sugar in protein, removing sugar in total egg, removing oxygen in food , microbiological sensing device, antibiosis and disinfection reaction, wherein immobilized penicillin acylating enzyme biocatalyst can be used to hydrolyze penicillin potassium and manufacture 6-APA.

The invention discloses a wastewater treatment device and method for in-situ electric generation of H2O2 cooperating with O3 oxidation. The device comprises a reaction container, wherein a magnetic stirrer is arranged at the bottom of the reaction container; a stirring magneton is arranged in the reaction container; a stainless steel microporous aeration head, an inert anode and a gas dispersing cathode are arranged in the reaction container; the inert anode and the gas dispersing cathode are vertically opposite to each other; the reaction container is also provided with a pipeline for introducing O3; and the inert anode and the gas dispersing cathode adopt a DC (direct current) power supply. The method comprises the following steps of: firstly inserting the inert anode and the gas dispersing cathode into the treated wastewater solution, and connecting with the DC power supply; then connecting pure oxygen with an ozone generator by a polytetrafluoroethylene tube; connecting the stainless steel microporous aeration head at a gas outlet of the ozone generator, and inserting into the bottom of the wastewater solution; and finally, switching on the DC power supply to treat the wastewater solution. Through the invention, H2O2 is continuously and efficiently generated and can quickly react with O3 to generate.OH so as to efficiently remove persistent organic pollutants in the water body.

A substituted porphyrin-metal coordination compound is prepared by simulating the biologic enzyme catalyst, and can be used as the cathode catalyst of methanol fuel battery.

The invention discloses a preparation method and application of activated carbon for recycling gold and belongs to the field of wet metallurgy and precious-metal recovery. The method disclosed by the invention comprises the following steps: weighing a certain amount of activated carbon, washing to remove ash in the activated carbon by using deionized water, filtering and drying; stirring and dipping the activated carbon at normal temperature by using a transition metal salt solution, washing, filtering and drying; stirring and dipping at normal temperature by using ferrous cyanate ([Fe(CN)6]4-) salt solution in a certain concentration range, generating a Prussian blue analogue compound on the surface of the activated carbon, washing and filtering; and drying the filtered activated carbon for later use. According to the activated carbon prepared by the method, gold ([Au(S2O3)2]3-) in thiosulfate solution can be recycled, the highest recovery rate can be 100 percent, and the maximum capacity of the activated carbon can be 1.27kg / t.

A composite disinfectant for culturing aquatic products contains potassium (or sodium) perferrite, excipient, and / or pH regulator, stabilizer, adhesive, talc powder and magnesium stearate. Its advantages are high effect on disinfecting, enriching oxygen in water, and removing heavy metals, organic substances and harmful suspended substances, and no poison.

The invention relates to an organic metal framework derived cobalt / nitrogen carbon nano material as well as a preparation method and application thereof. The preparation method comprises the followingspecific steps: (1) stirring and dissolving Co(NO3)<2>.6H2O in methanol to prepare a Co(NO3)2 solution; stirring and dissolving 2-methylimidazole in methanol to prepare a 2-methylimidazole solution;pouring the 2-methylimidazole solution into the Co(NO3)2 solution, standing and aging the mixture at room temperature, centrifuging the mixture, and washing and drying a product to obtain ZIF-67; and(2) carrying out annealing treatment on the ZIF-67 obtained in the step (1), and carrying out acid pickling, water washing and drying to obtain the cobalt / nitrogen carbon nano material. Compared withthe prior art, the cobalt / nitrogen carbon material prepared by the method has the advantages of low metal dissolution, good reusability, a simple and convenient operation process, a wide pH application range and the like when being used for activating peroxydisulfate, and has wide application prospects in the field of treatment of degradation-resistant organic matter wastewater.

The invention discloses an oxidization coagulant for treating coking wastewater, which consists of two parts of an oxidization flocculant and a coagulant aid. The oxidization flocculant comprises the following components according to proportion by weight: 8-20% of flocculant polyferric sulfate, 0.1-2.0% of oxidant ferrate and the balance of water; and the coagulant aid is polyacrylamide aqueous solution. In the invention, the double functions of oxidization and flocculation are available, the removal rate of the coking wastewater CODcr (Chemical Oxygen Demand) can reach more than 70%, the draining water is clear, the colority is less than 80 times, the adding amount is little, and the cost is low, wherein the medicament cost of advanced treatment is only 0.5 RMB / ton; the condition is easy to control and the operation is convenient. The invention provides an economical and efficient method and powerful assurances for the draining standard of advanced treatment of the coking wastewater.

The invention provides a method for preparing a core-shell ferroferric oxide / graphene oxide composite nano-catalyst. The method comprises the following steps of preparing nanometer ferroferric oxide by utilization of a hydrothermal method, preparing graphene oxide by utilization of a modified Hummers method, preparing the core-shell ferroferric oxide / graphene oxide composite nano-catalyst by utilization of an electrostatic self-assembly method. The catalyst prepared according to the method provided by the invention has the advantages that the adsorptive property is excellent, the stability is good, the catalyst can be cyclically utilized, and an excellent adsorption effect can be achieved during the process of degrading simulated dye rhodamine B.

The invention relates to a pharmaceutical chemical wastewater treatment device and a treatment method thereof. The treatment device comprises a vertical flow type coagulative precipitation tank, a catalysis zero valence bimetallic packing tower, a Fenton-like reactor, an anaerobic MBBR (Moving Bed Biofilm Reactor) pool, an aerobiotic MBBR pool and a solid-liquid seperation system which are sequentially connected. The treatment method is a catalysis zero valence bimetallic- Fenton-like-MBBR coupling treatment method. The treatment device has the advantages of being capable of simultaneously treating multiple organic pollutants, occupying a small area and being simple in structure and easy for finalization and industrialization. The catalysis zero valence bimetallic packing tower enables the performance of reducing and treating degradation-resistant organic matters to be stronger, does not harden after running for long-term and is suitable for a wide pH value range and low in operating cost, and the consumption of metallic iron is little. The Fenton-like reactor is faster in oxidation reaction rate and suitable for the wide pH value range. The pharmaceutical chemical wastewater treated by the wastewater treatment method provided by the invention can reach the new emission standard of wastewater in a pharmaceutical chemical industry.

An application of waste brick in treating sewage is dislcosed, which features that the leftover of brick is mechanically broken to become the granular adsorbent of harmful element (P, etc) in sewage. Its advantages are high adsorptive ability and low cost.

The invention relates to an anion chromatographic column a preparation method thereof, particularly relates to a preparation method of a surface-grafting anion chromatography stationary phase. The method disclosed herein is characterized by: preparing monodispersed linear polystyrene microspheres seeds by dispersion polymerization, activating the seeds, then synthesizing polystyrene-divinyl benzene-glycidyl methacrylate microballoons by one-step seed swelling method, and extracting to remove the pore forming agent; adopting multi-step grafting synthetic method, taking methylamine and 1,4-butanediol diglycidyl ether as raw materials, and introducing a large amount of positively charged quaternary ammonium groups as the anion exchange functional group to the surface of the prepared polystyrene-divinyl benzene-glycidyl methacrylate microballoons; and packing by homogenate method. According to the invention, the method disclosed herein has the advantages of low cost and simple process, the prepared filling material has uniform granularity and has no need to be screened, and the particle size distribution is narrow.

The invention discloses a protein flocculant for treating printing and dyeing wastewater. The protein flocculant for treating the printing and dyeing wastewater is prepared from various animal protein powders originating from cheap waste animal pelts, hoofs, animal fur powders and bean pulps aiming at different groups in a protein molecule and a chemical modifier for reaction. The invention simultaneously provides a protein flocculant compound. The invention provides a simple and practicable method; and by utilizing the method, various dye waste waters discharged in printing and dyeing plants and dye production plants can be effectively treated, and the product cost is cheap.

The invention belongs to the field of biological engineering and relates to chitosan modification. The chitosan modification comprises the following steps of: adding protein or polypeptide; adding transglutaminase; adjusting the pH value; removing precipitates after full reaction; and desalting and drying for modification. The modified chitosan produced by the technical scheme disclosed by the invention is good in water solubility, does not generate precipitate at the pH value of 3-10, and is small in viscosity. Moreover, the functions including strong adsorption, antibacterial property and the like of the chitosan are kept, and the application prospect is extensive.

The invention relates to a chemical bond connected strong cationic grafted amphoteric chitosan flocculant which is obtained by grafting strong cationic monomers to amphoteric carboxymethyl chitosan in an acidic condition through copolymerization. The chemical bond connected strong cationic grafted amphoteric chitosan flocculant is in such a structure as follows: in the chemical bond connected strong cationic grafted amphoteric chitosan flocculant, degree of substitution of a carboxylic acid group is 5-90%, methylacryloyl oxyethyl trimethyl ammonium chloride is a strong cationic monomer, and polymethylacryloyl oxyethyl trimethyl ammonium chloride accounts for 5-80% by mass of the chemical bond connected strong cationic grafted amphoteric chitosan flocculant. The flocculant provided by the invention has amphoteric characteristics, so that not only is the flocculant property improved, but also the dissolving property is improved. The raw material chitosan is wide in source, natural, non-toxic and degradable. The flocculant has multiple functions of good flocculation effect, metal ion absorption, bacteriostasis, deodorization, decoloration, and effective reduction of COD (Chemical Oxygen Demand) value and the like.

The invention discloses a preparation method of grafted amphoteric starch flocculants, which is implemented by carrying out graft copolymerization on cationic starches, acrylamide and an acrylic acid so as to obtain a grafted amphoteric starch flocculant, and the grafted amphoteric starch flocculant has the following structure shown in the abstract. The method disclosed by the invention has the following advantages that because a molecular chain is rich in anion-cation groups and has amphoteric characteristics, not only is the flocculation property of materials improved, and also the dissolving property of starches is improved; high polymer materials are wide in resource and low in cost, so that the grafted amphoteric starch flocculant has a high performance price ratio; starches have biodegradability and are non-toxic, so that starches do not produce secondary pollution to water bodies; the grafted amphoteric starch flocculant has various good effects such as flocculation, metal ion adsorption, bacteriostasis, deodorization, decoloring, and capability of effectively reducing the COD value; the grafted amphoteric starch flocculant has a characteristic of high efficiency, and is low in putting amount, and the putting amount is generally 0.1-10mg / L; and the the grafted amphoteric starch flocculant is suitable for treating water bodies with different charges, good in salt resistance and wide in applied pH range, and can be applied when the pH value is 1-12.

The invention discloses a treatment method of wastewater containing grease. The pH value of the wastewater is adjusted to 7.0-8.5 by adding a pH regulator, a wastewater treatment agent is added and then evenly stirred and mixed, and supernate is recovered after precipitation. The treatment agent can effectively process the wastewater containing grease, and is low in cost and good in effect, and pollution to an ecological environment caused by the wastewater containing grease is relieved. The grease content of the wastewater after being processed by the method disclosed by the invention can be up to below 12mg / L.

The invention discloses a salmonella enteritidis phage LPSE28, with the preservation number of CCTCC NO. 2018120. The salmonella enteritidis phage adopts a wide-spectrum type and can perform pyrolysison a drug-resistant strain of salmonella. Through verification, the salmonella enteritidis phage belongs to caudovirales myoviridaeT4-like viruses, and is called after LPSE28. The pH value of the phage LPSE28 is between 4 and 12, and the titer of the phage is stable at 40-60 DEG C. The invention also discloses application of the salmonella enteritidis phage LPSE28 to food. By utilization of the phage provided by the invention, salmonella enteritidis in food, particularly liquid eggs and milk systems can be effectively controlled, and compared with an antibiotic and a chemical preservative, the phage LPSE28 has the characteristics of high specificity, no residues and safety.

The invention provides a catalyst used for the preparation of hydrogen through water electrolysis. The catalyst is amorphous Ni-B, and an atom ratio of Ni to B is 1.0-5.0. The invention also provides a preparation method for the catalyst. The method is characterized in that Ni-B is loaded on the surface of a carrier through a chemical plating method, and the feeding atom ratio of B to Ni in a chemical plating liquid is 3.0-10.0. The amorphous Ni-B is successfully applied in the catalysis of a hydrogen evolution reaction through water decomposition, and the reaction activity of the amorphous Ni-B can be comparable with that of platinum. The amorphous Ni-B has the advantages of low hydrogen evolution over-potential, high catalytic efficiency, stable performances, low price and simple preparation, and becomes one of the most ideal catalysts for substituting the present noble metal Pt catalyst.

The invention discloses a process using an inorganic polymer flocculating agent polymerizing aluminum chloride and iron chloride, which is characterized in that, add alkaline matter in acidated waste liquor which is produced in the process that concavo-convex rod stone and clay produce floridin, stir the solution, adjust pH of solution, heat and polymerize solution, then fully stir solution to make reaction, thereby generating an inorganic polymer flocculating agent polymerizing aluminum chloride and iron chloride. The applicable pH range is wider, and the treatment effect is better than other flocculating agent in common usage.

A preparation method for a magnetic MOFs solid-phase extractant comprises the following steps: 1, employing a coprecipitation process to prepare a magnetic Fe3O4 nanosphere with the particle size of 10-20 nm; 2, employing Stober silica gel coupling process to prepare Fe3O4@SiO2 with a shell-core structure; 3, employing an in-situ precipitation process to prepare Fe3O4@SiO2@Cu(OH)2; 4, employing an in-situ conversion manner to synthesize Fe3O4@SiO2@HKUST-1; and 5, performing post-functionalization on Fe3O4@SiO2@HKUST-1 synthesized in the step 4 to synthesize the Bi-I modified magnetic MOFs solid-phase extractant. The advantages comprise that the provided method is simple, convenient, low in cost and friendly to environment. The prepared magnetic MOFs solid-phase extractant has the advantages of rapid adsorption speed, large adsorption capacity, high removal efficiency and the like, and efficient removal of low-concentration Hg<2+> can be realized.

The invention discloses a preparation method of a phosphotungstic acid @MIL(Fe) photocatalyst. The method comprises the following steps: firstly, dispersing phosphotungstic acid in a solvent; secondly, preparing MIL(Fe) through a solvothermal method so as to obtain the phosphotungstic acid @MIL(Fe) photocatalyst, wherein the phosphotungstic acid exists in a pore channel of the MIL(Fe) in a molecular state. The photocatalyst is high in catalytic activity, environmentally-friendly, easy to recover and recyclable; moreover, the method is simple in equipment requirement and convenient to operate, and has a great application prospect, and organic pollutants in water can be efficiently decomposed in a wider pH value range.