16results about How to "Improve adsorption removal effect" patented technology

The invention belongs to the technical field of wastewater treatment, and particularly relates to modified biochar and a preparation method thereof. The method comprises the following steps: weighing raw materials: ZnCl2 and soy sauce residue biomass; wherein the mass ratio of the ZnCl2 to the soy sauce residue biomass is m: 1, and the value of m is 0.25-1; the preparation method comprises the following steps: dissolving ZnCl2 in a certain amount of deionized water, and adding ground, washed and dried soy sauce residue biomass to obtain a solution A; the solution A is stirred for 10-14 h and then dried, and a mixture B is obtained; high-temperature pyrolysis: placing the mixture B in high-temperature pyrolysis equipment, heating to a preset calcination temperature at a rate of 4-6 DEG C / min in an N2 atmosphere, and lasting for 80-100 min to obtain a sample C; and sequentially cooling, washing and drying the sample C to obtain the modified biochar n-mZnBC. The prepared zinc chloride-doped sauce residue biochar has a good adsorption removal effect on 4-CP and Cr (VI), has low cost and high performance, and lays a theoretical foundation for practical application scenarios such as industrial wastewater in the future.

The invention belongs to the technical field of environmental new functional materials, and discloses a hydrophobic biochar composite material and a preparation method thereof. The hydrophobic biochar composite material comprises biochar, and the surface of the biochar is modified with a copolymer of sulfobetaine and acrylamide; the preparation method of the hydrophobic biochar composite material comprises: using acrylamide and [2-(methacryloyloxy)ethyl]dimethyl-(3-sulfonate propyl)ammonium hydroxide as raw materials, ammonium persulfate as an initiator, and N,N,N,N-tetramethylethylenediamine as an accelerator, preparing a copolymer of sulfobetaine and acrylamide, and modifying the copolymer on the surface of the biochar through physical adsorption and chemical action, specifically, putting the biochar into a mixed solution of acrylamide and [2-(methacryloyloxy)ethyl]dimethyl-(3-sulfonate propyl)ammonium hydroxide, introducing nitrogen to deoxidize, and then adding ammonium persulfate and N,N,N,N-tetramethylethylenediamine to react, generating a copolymer of sulfobetaine and acrylamide, and loading the copolymer on the surface of the biochar to obtain the hydrophobic biochar composite material. The hydrophobic biochar composite material provided by the present invention has the advantages of hydrophobicity, strong adsorption capacity, high practical application value, etc., can be used to adsorb hydrophobic pollutants in water bodies, and is a very promising new biochar material.

The invention provides a refining slag component control process optimization method and system in the refining process, and relates to the technical field of ferrous metallurgy steelmaking. The refining slag component control technology optimization method in the refining process comprises the following steps that S1, molten steel component and weight information is collected in real time; s2, inputting raw and auxiliary material components and cost parameters; s3, setting a refining slag component control target; and S4, calculating the adding quantity of the raw and auxiliary materials based on an extreme value optimal method. According to the method, the molten steel component information and the molten steel weight information are collected in real time, the optimal refining slag component control target and the lowest production cost of the current production steel grade are comprehensively considered, and scientific, reasonable and accurate guidance is provided for the adding type and number of raw and auxiliary materials in the refining process; the method is beneficial to improving the fluidity of the refining slag, improving the capability of removing impurities such as non-metallic inclusions in steel, reducing the production cost of enterprises and improving the product quality.

The invention provides a process and a device for purifying high-purity isopropanol. Impurities such as metal ions, water and particles are efficiently removed by adopting the technological processes such as ion exchange, pervaporation, distillation and filtration, the prepared electronic-grade isopropanol can reach 99.9% or above, the content of each metal ion is smaller than 1 ppb, and the application requirements of the microelectronic industry are met. The electronic-grade isopropanol produced by adopting the process flow and the equipment disclosed by the invention is high in yield, stable in product quality and high in practicability.

The invention belongs to the technical field of environmental microorganisms, and particularly discloses aspergillus niger with heavy metal lead adsorption capacity and application of the aspergillus niger. According to the invention, 33 parts of water and sediments at the Henan section of the Yellow River basin are subjected to microbial separation to screen out a fungus strain with high lead tolerance and adsorption, the fungus strain is named as Aspergillus niger AN-2 through morphology and ITS molecular identification, and the fungus strain is preserved in Guangdong Microbial Culture Collection Center (GDMCC) with the preservation number of GDMCC NO: 63697. Compared with other isolated strains, the Aspergillus niger AN-2 has the strongest tolerance to Pb < 2 + >, and the MIC of Pb < 2 + > tolerance is as high as 3500-3800mg / L. After being prepared into biomass, the strain has a good adsorption effect on heavy metal lead, can be used for preparing a heavy metal pollution bioremediation preparation, and has a wide application prospect and a relatively high economic value.

This invention relates to the field of water pollution control materials technology, specifically disclosing a method for preparing a quaternary ammonium salt modified starch-chitoxin composite gel. First, chitoxin powder is added to a green solvent to obtain a chitoxin solution. Then, a quaternary ammonium salt modified starch dispersion is added to obtain a chitoxin composite solution containing quaternary ammonium salt modified starch. Next, repeated freeze-thaw cycles are performed to obtain a viscous composite. A crosslinking agent is added dropwise to the composite to obtain a crosslinking gel precursor. Finally, the crosslinking gel precursor is soaked in alcohol and washed until neutral to obtain the quaternary ammonium salt modified starch-chitoxin composite gel. The green solvent is a urea-water system of NaOH, KOH, or LiOH; the crosslinking agent is epichlorohydrin or epichlorohydrin. The application of the quaternary ammonium salt modified starch-chitoxin composite gel in the removal of micro / nanoplastics from water is also disclosed. This invention aims to solve the problems of complex synthesis processes, high production costs, and easy secondary pollution associated with existing micro / nanoplastics adsorbent materials.

The present application belongs to the cross field of water treatment technology field and waste shrimp shell resource utilization technology field, and specifically relates to a waste shrimp shell derived chitosan-based iron-carbon composite hydrogel as well as a preparation method and application thereof. The present application carries out overall design around the preparation of chitosan and the forming process of network structure, adopts a betaine-acetic acid low eutectic solvent system to extract chitin in waste shrimp shells, and further converts to obtain chitosan. Meanwhile, carbon nanotubes and nano-ferroferric oxide are introduced into the chitosan system to synergistically regulate the material from two aspects of skeleton support and function supplement. The hydrogel microspheres have good antibiotic adsorption and degradation capacity, and have high application prospect in wastewater treatment in industries such as aquaculture, pharmaceuticals and agriculture.

The invention provides an industrial wastewater thallium removal agent as well as a preparation method and application thereof. The thallium removal agent comprises a first reagent and a second reagent, the first reagent comprises the following components in parts by weight: 10-30 parts of sodium sulfide, 20-40 parts of iron oxyhydroxide and 10-50 parts of modified silicon dioxide aerogel; the second reagent comprises the following components in parts by weight: 10-20 parts of polyferric sulfate and 5-10 parts of polyaluminum chloride; the modified silicon dioxide aerogel is prepared by the following method: mixing industrial water glass with water to form a mixed solution, and performing exchange with styrene cation exchange resin to obtain a silicic acid solution with the pH value of 2-3; the preparation method comprises the following steps: dissolving N-acetylcysteine in absolute ethyl alcohol to prepare a modifier; mixing a modifier and a silicic acid solution to form a mixture system, uniformly stirring, and performing aging treatment to obtain wet gel; soaking the wet gel in absolute ethyl alcohol for 10-12 hours, taking out the wet gel, and performing vacuum freeze drying to obtain the modified silicon dioxide aerogel. According to the thallium removal agent disclosed by the invention, the content of thallium ions in wastewater can be reduced to 0.1 ug / L or below, so that the wastewater reaches the environmental quality standard for surface water (GB3838-2002), and the harm of toxic heavy metal thallium to the ecological environment is reduced.

The invention relates to the technical field of arsenic pollution remediation, and in particular to a method for purifying groundwater in an arsenic contaminated site, comprising the following steps: S1, adding hydrogen peroxide to groundwater in the arsenic contaminated site with a pH value ranging from 3 to 12, and S2, passing the groundwater in the arsenic contaminated site through an iron-modified carbon composite material at a flow rate of 0.08 to 0.12 mL / min, thereby completing the purification of the groundwater in the arsenic contaminated site; the purification method of the invention considers adding hydrogen peroxide to the system to construct a Fenton-like reaction environment, and using the high adsorption performance of the iron-modified biochar and the good electron transfer performance of the carbon-based material, combined with its strong oxidizing ability, to oxidize highly toxic As(III) to As(V), thereby achieving the effects of efficient detoxification and fixation.

The application discloses a preparation method of a magnetic fluorine-removing resin. The method comprises the following steps: step 1, preparing an oil-phase dispersible modified iron oxide magnetic material; step 2, preparing a water-phase for suspension polymerization; step 3, preparing an oil phase containing the magnetic material; step 4, forming an epoxy-group-containing magnetic resin skeleton through suspension polymerization; step 5, grafting a nitrogen-containing carboxylic acid functional structure through ring-opening of the epoxy group; step 6, loading a zirconium-based fluorine-removing active component; and step 7, washing and balancing and post-treatment.

The invention discloses a composite polyaluminium chloride water treatment agent and a preparation method thereof, and belongs to the technical field of water treatment agent preparation. The preparation steps are as follows: placing a polyaluminium chloride solution in a reactor, adding a KH-570 coupling agent hydrolyzate and stirring evenly, adjusting the pH to 10 with a 0.1 mol / L sodium hydroxide solution, stirring and reacting for 4-6 hours, then adding modified octavinyl-POSS, modified chitosan and a composite emulsifier, stirring, slowly dripping ammonium persulfate under nitrogen protection, sealing the reactor, stirring and reacting for 3-4 hours at 60-65° C., and obtaining the composite polyaluminium chloride water treatment agent. The composite polyaluminium chloride water treatment agent has stable performance, large surface area, and a spatial network structure inside. The spatial network structure has better flocculation small particles and bridging adsorption performance than a branched structure. The composite polyaluminium chloride is used as a water treatment agent, and not only has a strong adsorption capacity, but also has stable flocs formed.

The invention belongs to the technical field of air filtering, and particularly relates to an air filtering system for automobile carpet production, the air filtering system comprises a filtering box and a fan, a mounting pipe is mounted on the side wall of the filtering box, the fan is mounted in the mounting pipe, and an air suction pipe is mounted on the side, located at the air suction end of the fan, of the mounting pipe; and the air suction pipe is fixedly communicated with a hollow plate, a plurality of air suction buckets are fixedly inserted into the bottom of the hollow plate, an air inlet monitoring mechanism is installed in each air suction bucket, and air inlet adjusting mechanisms electrically connected with the air inlet monitoring mechanisms are installed on the hollow plate and the air suction buckets. The negative pressure suction force of the air suction end of the draught fan can be adjusted and controlled based on the fluff amount, the timeliness and sufficiency of adsorption of waste such as fluff can be improved, the fluff can be agglomerated by adjusting and controlling the air outlet position, the probability that the fluff with the small particle size escapes is reduced, and meanwhile people can be reminded to transfer out the filtered and intercepted waste such as the fluff in time.

The invention discloses an underground water pollution treatment method based on an in-situ renewable permeable reactive barrier filler. The method comprises the following steps: an adsorption stage: adsorbing organic pollutants in underground water by using the in-situ renewable permeable reactive barrier filler; and an in-situ regeneration stage: providing persulfate to the permeable reactive barrier filler adsorbed with the organic pollutants, performing catalytic oxidation on the adsorbed organic pollutants, and recovering the adsorption capacity of the permeable reactive barrier filler. The preparation method of the permeable reactive barrier filler capable of being regenerated in situ comprises the following steps: uniformly mixing a crushed biomass material with an active metal salt solution, standing, pre-drying the obtained mixture until the water content is 75-85wt%, grinding and crushing, and continuously drying to obtain a dried product; the active metal salt comprises ferrous sulfate and copper sulfate; and pyrolyzing the dried product under an anoxic or anaerobic condition to obtain active metal iron and copper loaded biochar, namely the permeable reactive barrier filler.

The invention relates to the technical field of purification materials, in particular to an aerogel fiber material for removing formaldehyde and a preparation method thereof.The aerogel fiber material for removing formaldehyde comprises a fiber net and an aerogel foam layer loaded on the fiber net, and the density of the fiber net is 0.05-0.3 g / cm < 3 >. The aerogel fiber material for removing formaldehyde has a good formaldehyde removal effect, and the problem of secondary pollution caused by formaldehyde desorption can be solved.

The invention discloses a preparation method and application of a modified montmorillonite wetland filler based on wetland hydraulic characteristics. The preparation method comprises the following steps: crushing montmorillonite, sieving, washing, freeze-drying, and roasting at high temperature for pre-activation; soaking the obtained product in diluted hydrochloric acid for reaction, washing, drying, and carrying out high-temperature roasting activation to obtain acid modified montmorillonite; the preparation method comprises the following steps: carrying out a ring-opening reaction on GTA and chitosan according to a mass ratio of GTA isopropanol to chitosan, which is optimally designed according to a Box-Behnken response curved surface, so as to prepare a quaternary ammonium salt chitosan modifier; the preparation method comprises the following steps: dissolving a quaternary ammonium salt chitosan modifier in deionized water according to the mass ratio of the quaternary ammonium salt chitosan modifier to the acid modified montmorillonite which are optimally designed on the basis of a Box-Behnken response curved surface, uniformly mixing with the acid modified montmorillonite, carrying out oscillation reaction in a constant-temperature water bath, and washing, centrifuging and freeze-drying after the reaction is completed. The method has the best adsorption and removal effect on pollutants such as phosphorus, oxygen-consuming organic matters, antibiotics and the like.

A method for preparing a cobalt-based semi-crystalline adsorbent belongs to the field of nanomaterials and environmental materials preparation. This method, based on the addition of auxiliary reagents, effectively improves the electron-donating characteristics of the cobalt-based semi-crystalline adsorbent and enhances its adsorption capacity for heavy metal ions by simultaneously introducing electron-rich terephthalic acid and urea into the system. The invention utilizes auxiliary reagents to adjust the pH of the system while simultaneously promoting the deprotonation process of terephthalic acid and maintaining the coordination activity of urea. This facilitates the rapid self-assembly and assembly process between organic ligands and metal ions at room temperature, ensuring the sufficient introduction of organic ligands with abundant lone pair electrons into the cobalt-based semi-crystalline adsorbent, thereby improving its electron-donating capacity and enhancing its adsorption and removal capacity for heavy metal ions.