155results about How to "Less prone to secondary pollution" patented technology

The invention relates to a preparation method of binary polymer molecule brush heavy metal chelating agent. The preparation method is characterized by comprising steps of dissolving 5-10 parts by weight of binary polymer molecule brush in 10-50 parts of water; stirring for 1-10 hours under 20-30 DEG C, and obtaining micellar solution of nanometer heavy metal chelating agent. The invention solves the defects that the settling effect of heavy metal ion is bad and the settlement is completed by micromolecule polysulfide; every molecular chain can provide hundreds and even thousands of coordination sites to match and crosslink with heavy metal ions, and thereby obtaining micron order to millimeter aggregation, and effectively settling and separating from water body. The generated aggregation is good in stability, not easy to decompose and generate the secondary pollution.

The invention discloses a waste lithium ion battery positive electrode material regeneration method, which comprises: discharging and disassembling a waste lithium ion battery to obtain a positive electrode current collector, shearing the positive electrode current collector into small thin sheets, and carrying out pyrolysis; separating the aluminum foil from the active substance by using a physical method; carrying out ball milling treatment on the waste positive electrode active substance, wherein the damaged part on the surface of the waste lithium ion battery positive electrode material can be stripped off through the ball milling so as to directly obtain the undamaged material, and the surface properties of the waste lithium ion battery positive electrode material with different damage degree can be converged so as to reduce the differences between the materials; after the ball milling grading, immersing the material in lithium hydroxide aqueous solution; and calcining to obtain the regenerated material. According to the present invention, the positive electrode material is regenerated by using the ball milling method, such that the method is simple, economic and effective, and has strong operability.

Treatment for smelting and separating fly-ash heavy metal from firing refuse is carried out by adding 3-10 wt% lime hydrate, 1-5 wt% treacle and 5-7 wt% water into fired fly-ash, granulating by disk granulator, retaining to form into pellet, adding fly-ash pellet into smelt separating furnace at 1400-1480 degree for 10-30 mins, depositing heavy metal in fly-ash into iron-water smelt tank to form into iron alloy and curing heavy metals into cinders. The separated fly cinders can be used as building raw materials. It has no secondary pollution.

The invention relates to a novel reclamation method of electroplating sludge, belonging to the technical field of chemical and environmental science. The method takes the electroplating sludge as raw material, right amount of iron source is supplemented into the raw material, agricultural waste rice hulls treated by activating are added into the raw material, the reclamation for the electroplating sludge can be realized under the conditions of mild water heat, ventilation and proper alkaline condition, and porous loaded type ferrite new material is obtained. The novel reclamation method is energy-saving and high in efficiency, and can realize regenerating cyclic utilization of solid waste; the obtained porous loaded type ferrite new material is high in stability, difficult in dissolution of heavy metal ions and free from secondary pollution, and can be used for efficiently removing mercury ion in water; furthermore, the porous loaded type ferrite new material has good magnetism, thus being convenient to recover, separate and recycle, and achieving the aim of controlling waste by waste. The process route is high in efficiency, simple, mild and low in energy consumption, and does not easily generate secondary pollution; and the needed device is simple, convenient to operate, easy in control of conditions and low in production cost.

The invention discloses a sulfide heavy metal chelating agent and a preparation method thereof; the method adopts a reaction between sodium sulfide water solution and sulfur to generate sodium polysulfide and uses aluminum sulfate, aluminium chloride and other aluminum salts as stabilizers so as to strengthen the flocculation effect and increase the catching effect on heavy metal ions. The chelating agent is used to treat the industrial wastewater containing heavy metal ions, can effectively restrain the generation of hydrogen sulfide, and reacts with all kinds of heavy metal ions quickly at room temperature to generate water insoluble sulfides precipitate, wherein, the particles of the produced sulfides is large, the floccule is dense and the settling time is reduced so that the concentrations of the heavy metal ions in wastewater are easy to be reduced below the national discharge standard, the generated residue can be used for recycling heavy metals and secondary pollution is not easy to cause; the method of the invention has simple devices, convenient operation and low cost, thus being applicable to the wastewater treatment in industries such as circuit board industry, plating industry, metal finishing industry, manufacturing industry, coal power stations, municipal or industrial waste incineration industry, battery production and the like.

The invention provides an in-situ ecological restoration method for riverway polluted sediment. Three layers of plant ecological concrete are laid on riverway sediment at an upper layer, an intermediate layer and a lower layer; unfoamed plant ecological concrete with the thickness of 5-10 centimeters is laid at the lower layer and has an effect of preventing sediment pollutant from upwards releasing to an overlying water body; iron-aluminum oxides are added into the concrete; formed plant ecological concrete with the thickness of 10 centimeters is laid at the intermediate layer and has an effect of providing a carrier for growth of a submerged plant; activated carbon particle piles are distributed in the formed concrete layer; and the submerged plant is planted in the activated carbon particle piles; the formed plant ecological concrete with the thickness of 2-5 centimeters is laid at the upper layer; and the iron-aluminum oxides are added into the concrete. The in-situ ecological restoration method is simple and practical and is convenient in operation, plant ecological concrete bricks are covered on the riverway sediment, heavy metal in the sediment is prevented from entering the water body, a pollution way of a pollution resource is cut off, secondary pollution is difficult to generate, and the heavy metal in the sediment is absorbed by the submerged plant.

The invention relates to an indoor polluted gas scavenger and a preparation method, and the method comprises the following steps: uniformly stirring nano-bamboo charcoal or the nano-bamboo charcoal after modification with the following raw materials according to the percentage, mixing, then adding an appropriate amount of water and a latex adhesive, stirring, fully infiltrating, and carrying out vacuum drying at normal temperature for preparation. The specific raw materials are as follows: the nano-bamboo charcoal or the nano-bamboo charcoal after the modification: 28-52%; potassium permanganate: 1-10%; basic aluminum oxide or magnesium hydroxide: 30-60%; ammonium chloride: 1-10%; and the latex adhesive: 2-8%. The invention belongs to the comprehensive technical field of environmental medicine, natural products, environmental protection, environment and human health, new materials and the like, and the product is mainly used for eliminating the harm caused by free formaldehyde, benzene, toluene and TVOC in the air, thereby further solving the relevant air pollution in rooms and relative closed spaces and being conductive to protecting the human health.

The invention discloses a method and a device for removing heavy metals and POPs in organic wastes by electromagnetic reinforcement. The method comprises the following steps of: firstly preparing theorganic wastes into slurry; applying a magnetic field to the slurry to make sure that the heavy metals and the POPs in the slurry are transformed into a water solution state; separating the organic waste slurry into two components; afterwards applying an electric field to the slurry, migrating water molecules and the heavy metals and POPs which are continuously transformed into the water solutionstate to a cathode region of the electric field under the effect of electro-migration, and meanwhile migrating the components of the organic wastes to an anode region of the electric field so as to realize separation of the two components; and filtering and dehydrating the organic waste slurry to finally obtain harmless low-water-content organic wastes. The method and the device disclosed by the invention can be used for efficiently removing large-particle impurities, some heavy metals and the POPs in the organic wastes, can also reduce the water content of the organic wastes to 30% to 50%, thereby overcoming the defects that a traditional organic waste treatment method is low in efficiency, takes effect slowly and has no oneness.

The invention discloses a method for removing metal ions in water by utilizing magnetically-separated steel slag tailings. The method for removing heavy metal ions from waste water by utilizing magnetically-separated steel slag tailings containing less iron content comprises the steps of grinding, drying and screening the magnetically-separated steel slag tailings, and then placing into a reactor; adding waste water (containing heavy metal ions) into the reactor, and fully mixing; and separating solid from liquid to obtain tailings, and treating to discharge water. According to the method, as a material for water treatment, the magnetically-separated steel slag tailings is low in cost, wide in sources and large in specific weight, thus being convenient to recycle, and having less possibility of causing secondary pollution. In addition, the steel slag tailings belong to solid waste, thus achieving the purpose of treating wastes with wastes after being applied into waste water treatment, and having excellent economic and environment-friendly benefits.

The invention relates to an industrial wastewater treatment device and a treatment method. The device comprises a reactor body, a water inlet pipe, a water outlet pipe, a blow-off pipe and the like, wherein the reactor body is filled with a filler. According to the device and the method, inorganic ions in the industrial wastewater are crystallized and precipitated, and grow on the surface of the filler to form heterogeneous crystallization, so that the inorganic ions in the industrial wastewater are removed effectively; and the treated qualified waste water is discharged out of the reactor from the water outlet pipe. Water treatment can be conducted continuously through a method such as filler supplementing or filler regeneration. Compared with a conventional treatment method, the device does not need flocculation, precipitation or other units; no sludge is produced; and the device has the advantages that treatment speed and removing efficiency are high, secondary pollution cannot be caused easily, so as to have a broad prospect in actual industrial application.

The invention relates to the technical field of oil fume and waste gas purification, in particular to an unpowered purification device for gas particulate matter. The device comprises an adsorption filter element, wherein the adsorption filter element comprises a rotating shaft, a helical blade and adsorption filler; the helical blade is fixedly arranged on the rotating shaft; the gap of the helical blade forms a helical air passage; at least one of the adsorption filler is arranged inside the helical air passage; gas can flow along the helical air passage through the adsorption filler; the adsorption filler is connected with the rotating shaft or connected with the helical blade; the helical blade is made of filtering and adsorption materials; the adsorption filler comprises filtering and adsorption materials. The invention aims to provide the unpowered purification device for gas particulate matter, so as to solve the problems in the prior art that the purification investment cost for the gas particulate matter is high, the daily maintenance cost is high, and secondary pollution is easy to cause.

The invention discloses a preparation method of a scale and corrosion inhibitor, which belongs to the technical field of preparation of water treatment chemicals. Nano cellulose prepared by utilizingneedle wood leaves is used as an adsorption carrier of corrosion inhibitor. The parent corrosion inhibitor prepared by the invention is Mannich base, by virtue of quaternization, the parent corrosioninhibitor adopts nitrogen atoms with larger electronegativity as a center polar group, the polar group is extremely high in hydrophilic performance, the concentration of the metal ions which are easyin forming scales such as calcium and magnesium can be reduced, the surface of a chelated adsorption material is coated with oxidized nano cellulose to form a nano filter membrane, the metal ions canbe efficiently adsorbed, the corrosion of saline-alkaline water for a salt discharging concealed pipe can be reduced, and when the added graphene oxide is oxidized, the graphene lamina is swelled, sothat a gap between two layers can be enlarged, the ion exchange is likely to occur for the metal ions in the saline-alkaline water, and the scale and corrosion inhibitor provided by the invention is high in capability for adsorbing and controlling the metal ions in the saline-alkaline water, and wide in application prospect.

The invention relates to a hospital formaldehyde pollution scavenger and its preparation method. The preparation method provided by the invention comprises the steps of: uniformly mixing nanometer bamboo charcoal or modified nanometer bamboo charcoal with raw materials according to the following weight percentage, adding 10-20% of water for complete infiltration, and carrying out vacuum drying at normal temperature, wherein the above components are concretely composed of, by weight, 30-60 wt% of nanometer bamboo charcoal or modified nanometer bamboo charcoal, 1-10 wt% of potassium permanganate, 30-60 wt% of alkaline aluminum oxide or magnesium hydroxide and 1-10 wt% of ammonium chloride. The invention belongs to the integrated technical field of environmental medicine, environment and human health and new materials. The product provided by the invention is mainly used to eliminate the harm of the formaldehyde pollution under special circumstances of hospitals, and is beneficial to protect the health of medical workers and patients.

The invention discloses an electrochemical method for removing trivalent Sb, relates to a method for removing trivalent Sb, and aims to solve the technical problem that the existing method for removing trivalent Sb pollutants in water takes a long time and is inefficient. The method comprises the following steps: 1, in an electrochemical workstation, arranging a Pt electrode as a counter electrode, carbon cloth as a working electrode, and an Ag/AgCl electrode as a reference electrode; 2, introducing to-be-treated water containing the trivalent Sb into an electrolytic cell of the electrochemical workstation, and performing electrochemical treatment to complete the removal of the trivalent Sb. By simply processing the carbon cloth, rapid and efficient removal of the trivalent Sb is realizedunder the circumstance of impressed voltage, and great significance for the removal and recovery of the trivalent Sb as a water pollutant is achieved.

The invention discloses a method for efficiently degrading a polyvinyl alcohol material. The method specifically comprises the following steps: swelling PVA at normal temperature, heating and dissolving the PVA, and adjusting the pH of a dissolving solution to 3 to 5; under a condition of constant temperature of 40 to 90 DEG C, adding an oxidant and a catalyst drop by drop while stirring, and performing reaction for 1 to 5 hours; adding a sodium hydroxide solution into the degraded solution to adjust the pH of the solution to be 9 to 13, performing sedimentation and filtration, and recycling iron sludge. The method is easy to operate; the oxidant and the catalyst both are conventional medicines, wide in source and low in cost; by the improvement on the adding mode and the ratios of the oxidant and the catalyst, degradation of the polyvinyl alcohol material which is a waste solid is realized; the PVA is degraded into a small-molecular-weight organic matter which has the molecular weight less than or equal to 500 g/mol and is easy to degrade; the organic matter at the molecular weight level is easily subjected to further biological degradation, thermal cracking and the like and is easy to treat; and no secondary pollution is caused.

Theinvention discloses a carbon foam loaded magnesium-nickel-copper composite hydrogen storage material. The material is prepared from 50-70 parts by mass of carbon, 20-40 parts by mass of magnesium, 5-10 parts by mass of nickel, and 5-10 parts by mass of copper. The invention further discloses a preparation method of the carbon foam loaded magnesium-nickel-copper composite hydrogen storage material. The preparation method comprises the steps of preparing carbon foam carrier material particles, preparing magnesium-nickel-copper alloy powder, and preparing the hydrogen storage material with the prepared carbon foam carrier material particles and the prepared magnesium-nickel-copper alloy powder. Multiple metal alloys are loaded based on a skeleton and a mesh porous structure of the carbon foam, so that clear channels are provided for diffusion and absorption of gas in the hydrogen storage process. The formed composite material has performance of both the carbon foam and the multi-component alloy hydrogen storage material, thereby having high hydrogen storage capacity. The raw materials of the hydrogen storage material are from coal tar pitch and magnesium-nickel-copper alloy. The preparation process is simple and controllable, and the cost is low.

The invention provides a curing and stabilizing agent capable of reducing leaching toxicity of heavy metals in soil and a preparation method of the curing and stabilizing agent. The curing and stabilizing agent is mainly prepared from cement, sodium sulfide slag, ferrous chloride, phosphogypsum and an additive, can reduce the leaching toxicity of the heavy metals such as Pb and Cd in the soil, canpersistently and effectively cure and stabilize heavy metal pollutants in the soil, and has a good repair effect on the soil; a content of the available heavy metals in the repaired soil is significantly lower than that specified in the national standard; the heavy metals have low possibility of leaching; and the possibility of a secondary pollution phenomenon is low.