287results about How to "Improve removal efficiency" patented technology

The invention relates to a liquid-phase smoke desulfuration denitration purifying method and relative device, belonging to the smoke purifying technique. It can effectively remove sulfur dioxide and nitrogen oxide of smoke. It utilizes ejection bubbling method to adsorb the sulfur dioxide and nitrogen oxide of smoke, while the adsorption solution is the sodium chlorite solution in 0.001MOL/L-0.100MOL/ or the additive in 0.001MOL/L-0.005MOL/L, and the pH valve of adsorption solution is 3-11; the additive is one or the combination of calcium hypochlorite, baking soda, hydrogen dioxide solution, acid sodium phosphate, or calcium hydrate. The removing efficiency of sulfur dioxide in said invention is above 99%; the removing efficiency of nitrogen oxide is above 90%; and the utilization of adsorption solution is above 97%. Therefore, said invention has the advantages that high removing efficiency, lower cost, simple device, high utilization of adsorption solution and wider application for large, middle, and small boiler, etc.

Disclosed are a device for treating nitrogen and phosphorus from wastewater, including: an algal culture tank for culturing microalgae capable of treating nitrogen and phosphorus from wastewater; and a separation membrane for separating thus treated water from the microalgae, and a method for the same.

According to the disclosed device and method, microalgae are cultured at high concentrations using wastewater, instead of an artificial culture medium, as a culture medium. As a result, nitrogen and phosphorus can be effectively treated from the wastewater, and the microalgae, which are useful as a biomass, may be cultured and recovered stably.

The invention discloses a device and a method for removing CO2 in flue gas by dry process and using a highly active potassium based absorbent. The device essentially consists of two circulating fluidized bed reactors, two sets of buried pipe type heat exchangers, two sets of materiel cycle devices and a gas generating, mixing and delivery device. After desulfurization, flue gas and steam generated by the exhausted spare heat of a steam turbine are mixed and sent into a first circulating fluidized bed reactor and react with the highly active potassium based absorbent in the reactor to remove CO2 in the flue gas; after reaction, the absorbent is sent to the other circulating fluidized bed reactor and regenerated in the reactor through the buried pipe by using the heat of hot flue gas generated in a station boiler. Mixed gas generated is dehydrated by a condenser and high purity of CO2 is obtained. Part of CO2 is taken as a fluidizing medium for a regeneration reactor and the rest is collected and disposed. The device is organically integrated with a coal power generation system and utilizes coal flue gas to provide heat needed by the device, which is a prioritization scheme with low energy consumption and investment.

The invention discloses a method for removing nitrogen-containing compounds in oil products by virtue of eutectic solvent extraction. The method comprises the following steps: (1) by taking an oil product as a raw material liquid and a eutectic solvent as an extracting agent, performing single-stage extraction or multi-stage extraction in an extraction apparatus to obtain oil remained after extraction and a nitrogen-containing compound enriched extract; (2) washing the oil remained after extraction in the step (1) with water and drying to obtain denitrified; (3) performing back extraction on the extract in the step (1) by use of a weakly polar solvent to remote the nitrogen-containing compounds in the extract, and then evaporating to obtain the regenerated eutectic solvent. According to the method, based on a liquid-liquid two-phase system, the eutectic solvent is taken as the extracting agent and the nitrogen-containing compounds in the oil products are removed by virtue of single-stage extraction or multi-stage extraction; the operation process is simple, the denitrification percent is high and the oil product yield is high.

The invention relates to an electrokinetic remediation method of heavy metal contaminated soil by using a composite electrode. According to the invention, an active material layer is adhered to the surface of a graphite electrode or a metal electrode with an anode and a cathode so as to form an integrated composite electrode with permeable reactive performance; on one hand, a cathode permeable reactive layer is used for neutralizing and adsorbing OH- generated by electrode reaction, avoiding the increase of pH value of cathode soils and further preventing heavy metals from depositing in the soils untimely; on the other hand, cathode permeable reactive layer is used for capturing the migrated heavy metal pollutants. The permeable reactive materials of the anode are mainly used for capturing the migrated heavy metal ions, an acid migration area generated by anode electrolytic reaction enters into the soil so as to dissolve out most heavy metals, the heavy metals are migrated into the anode and cathode permeable reactive materials under the action of an electrodynamic force, and in-situ removal of the heavy metal pollutants in the soil can be realized by the removing electrode. Afterremediation, the anode and the cathode are exchanged to balance the pH value of the soil.

The invention discloses a Fenton and air-float integral water disposal method, which comprises the following steps: adding Fenton agent into armed waste water; setting mass ratio of hydrogen dioxide solution of Fenton agent against COD of armed water at 0.3-3:1; reacting at 0.5-5 h; using alkality material to adjust Fenton agent armed water pH value at 6-10; proceeding floating treatment; setting air-float air-solid ratio at 0.03-0.06, surface loading at 7-15m3/m2.h and stopping time at 10-40 min; removing floating contaminant and most of dissolving organic contaminant.

A microorganism which can remove the malodorous gas of NH3 and H2S synchronously and a preparation method thereof relate to the microorganism technical field and in particular to an efficient deodorization microorganism of the mixed malodorous gas in a sewage collecting and disposing establishment and the preparation method thereof. An acidithiobacillus thiooxidans CCW-Y2 strain provided by the present invention is conserved in the General Microorganism Center of China Committee for Culture Collections of Microorganisms, and the conversing serial number CGMCC No. is 2158. The strain is ammonium sulfate tolerant type and is obtained by sieving and separating from the activated sludge of the living sewage disposal factory. The culture conditions of the acidithiobacillus thiooxidans CCW-Y2 strain of the present invention are as follows: firstly, SOB culture medium is adopted, and the components of the culture medium are the dipotassium hydrogen phosphate of 2g/L, the potassium dihydrogen phosphate of 2g/L, the magnesium chloride (MgCl2/7H2O) of 0.2g/L, the ammonium sulfate of 10g/L, the ferrous sulfate (FeSO4/7H2O) of 0.01g/L and the powdered sulfur of 10g/L; secondly, the culture condition is the temperature of 28 DEG C to 32 DEG C and 180 circles per minute; thirdly, a carrier is water, and dilute sulfuric acid (or hydrochloric acid) is added for adjusting pH value to be 2.0 to 3.0. The acidithiobacillus thiooxidans CCW-Y2 strain of the present invention can be directly inoculated into a waste gas disposing establishment (such as a biological filtration tower) and can synchronously remove the mixed malodorous gas of the H2S and the NH3 efficiently, which simplifies the operation condition of the waste gas disposing establishment and ensures that the operation is more simple.

The invention discloses a treatment method for analyzing a waste liquid. The waste liquid contains Cr<6+>, Cr<3+> and Fe<3+>; the method comprises the following steps: (I) adding a pH regulator into the waste liquid to adjust the pH value of the waste liquid to 2-4, and adding a reducing agent to convert Cr<6+> into Cr<3+>; (II) adding a pH regulator to adjust the pH value of the solution after the reducing reaction to 10-12 so that the Fe<3+> in the solution is converted into Fe(OH)3 and subjected to coagulating precipitation for separation; and (III) adding a pH regulator to adjust the pH value of the solution after the precipitation to 6-9 so that the Cr<3+> in the solution is converted into Cr(OH)3 and precipitated and separated out. The treatment method for analyzing waste liquid disclosed by the invention effectively separates heavy metals in the waste liquid.

A three-dimensional ecological floating bed and its water-cleaning method, which is the water cleaning technology in environmental engineering; the said three-dimensional ecological floating bed comprises upper, middle and lower three layers, the upper layer is aquatic plant unit(21), the middle of the central hollow pipe in the upper layer is equipped with overflow water inlet pipe(11), the upper of the hollow pipe is equipped with air inlet pore(2), the top is equipped with drop-down map(9), the lower of the hollow pipe is equipped with water inlet pore(10), shampoo spray is installed in the upper part of the drop-down cap; the middle layer is aquatic animal unit(22), aquatic animal cage(14) is equipped in this layer, perforated board(19) and intermediate water intake loop are equipped in the lower part, sampling pipe(6) is connected with intermediate water intake loop(20); the lower layer is the artificial dielectric unit(23), the artificial dielectric(13) is suspended in the suspending support(12), a bottom support(17) and a bottom water intake loop(18) are equipped in the bottom; a floating bottle(3) is equipped in the peripheral of the ecological floating bed.

The invention aims to disclose a device and a method for processing wastewater of cold-rolled leveling liquid. Floating oil in the levelling liquid wastewater is removed through a barrate oil receiving device; the dissolved or emulsified oil is removed through a high-efficiency CAF air floating pool, thereby having little investment and low operating expenses and saving occupied area; the water coming out from the CAF air floating pool enters an anaerobic treatment unit and an MBR membrane biological reaction unit; the water firstly passes through the anaerobic treatment unit, and the anaerobic treatment unit is used as pretreatment of an aerobic treatment unit, thereby avoiding the temperature problem met by aerobic treatment in the prior process and problems that certain organism can not be degraded under the aerobic condition, has overhigh load and impacts load and ensuring that aerobic outlet water is stable and meets the standard; the concentration of organism in the water can be reduced below 100 mg/LCODcr; and the treated water quality reaches first level standard stipulated by Integrated Wastewater Discharge Standard of People's Republic of China (GB8978-1996), thereby realizing the aim of the invention.

A non-polarized discharge liquid treating device and treatment are disclosed. Plated electrode (7) and plated electrode (8) are discharging in liquid-phase, gas-liquid phase or gas-liquid mixed phase to realize high-voltage discharging plasma by high-voltage pulse or DC, heat-resistant insulating board (14) with hole (13) focuses electric field to locality, which makes local electric filed a certain height. It can realize plasma discharge, produce shock wave, ultraviolet ray and various active free radicals and remove various pollutants effectively. It's efficient and has no electrode melt.

The invention discloses a repairing method capable of reducing total amount of heavy metal in soil. The method comprises the following steps: applying an activating agent containing a surfactant to soil according to the volume ratio of the activating agent to the soil being (1 to 3) to 1 so as to separate the heavy metal from the soil particles; adding a porous material into the soil according tothe volume ratio of the porous material to the soil being between (2 to 1) to (1 to 3), mixing and stirring, so that metal elements are adsorbed to the surface of the porous material; and separating the porous material and the soil through sieving or magnetic separation. By the repairing method, lead, cadmium, arsenic, zinc, cobalt, chromium and the like existing in the soil or sludge can be reduced or removed at one time, and the risk that the heavy metal is released again caused by the change of the soil environment can be avoided.

The invention discloses an oxidation film removing method based on femtosecond laser etching. The method is applied to surface oxidation film removing before welding of metal such as aluminum alloy and magnesium alloy. According to the method, with a femtosecond pulse laser serving as a direct tool, transverse or longitudinal progressive scanning of a pulse sequence on the surface of a workpiece is achieved through a scanning galvanometer. Under the effect of the ultra-intense and ultra-short femtosecond pulse laser, an oxidation film vaporizes instantly and is driven by a vapor stream formed on the surface to escape or be desorbed from the surface, and thus the oxidation film is efficiently and precisely removed in a controllable mode; or, in combination with linear motion of the workpiece, the oxidation film in a designated area of the surface of the large-breadth workpiece can be precisely removed through etching, the influence of the heat effect on the structure property of a base material can also be effectively avoided, and meanwhile the oxidation film can be thoroughly removed in an environment-friendly mode. The method has broad application prospects in oxidation film removing for fusion welding of light metal such as aluminum and magnesium.

The invention discloses a system for purifying eutrophic water employing artificial flow aeration coupled to a biological film floating bed. The system comprises biofilm colonization, a floating bed, and artificial flow aeration, wherein a biofilm colonization carrier is a soft fiber filler, and is combined with the floating bed to form a biological film floating bed unit; the artificial flow aeration is that a plurality of push flow aerators arranged below the biological film floating bed unit are started towards the same direction to form circulating flow water, and supply oxygen to the water. The system adopts a plurality of biological film floating bed units, which are fixed by an anchor stake, connected by a connecting rod, and arranged in an oval shape; a guide wall is arranged in the middle; the push flow aerators are arranged below the floating bed. Compared with the common biological film floating bed, the artificial flow aeration is increased, the water mobility is enhanced, an independent aeration system does not need to be arranged, the removal efficiency of pollutants are high, the water eutrophication degree can be effectively relieved, and the operation mode can be regulated and controlled according to the dynamic change of water temperature and water quality, and the system is more stable, efficient and energy-saving in operation.

A process for purifying air includes such steps as filtering to remove particles, photodecomposing-photocatalyzing reaction in a chamber with photocatalyst coated on its inner surface for primarily degradating the pollutants, and adsorption-ozone decomposing-catalystic oxidizing on a multifunction bed to further remove pollutant. Its advantages are no secondary pollution.

The invention relates to a combination process for advanced treatment on urban storm runoff, which comprises rainwater treatment and backwashing sewage disposal, wherein the rainwater treatment comprises the following processes that: a pressurized water pump conveys rainwater collected in a rainwater raw water tank to a quartz sand filter, an activated carbon filter, a PP filter element and an ultrafiltration membrane component sequentially through pressurization, and the treated rainwater is stored in a water producing water tank; and the backwashing sewage disposal comprises the following processes that: when the quartz sand filter and the activated carbon filter are washed, a valve between the activated carbon filter and the PP filter element is closed, and the a sewage valve positioned at the top of the quartz sand filter and the activated carbon filter is opened; pressurized rainwater raw water passes through the quartz sand filter and the activated carbon filter sequentially at a high speed, and impurities absorbed on the surface of a filter material are washed by utilizing the impulsive force of high-pressure stream; and when an ultrafiltration membrane is subjected to backwashing, a solenoid valve I and a solenoid valve II are opened, a solenoid valve III is closed, a transfer pump conveys the water in the water producing water tank to the ultrafiltration membrane component, the water is pressed into an inner membrane of the ultrafiltration membrane from an outer membrane of the ultrafiltration membrane, and the water is discharged from a backwashing sewage disposal pipeline.

The invention provides a composite device for aftertreatment of ship low-speed diesel engine end gas. The composite device comprises a denitration system and a washing system. A diesel engine is connected with an gas inlet header through a gas inlet pipe, the gas inlet header is connected with a gas compressor through a rear pipeline of the gas compressor, the diesel engine is connected with a gas outlet header through a gas outlet pipe, the gas outlet header is connected with an inlet of a turbine through a front pipeline of the turbine, an outlet of the turbine is connected with an outlet pipeline, and the outlet pipeline is connected with the denitration system and the washing system. According to the composite device, an SCR (selective catalytic reduction) system is positioned in rear of a turbocharger to facilitate flexible arrangement of an SCR device, the temperature of front end gas of a reactor is increased by bypassing front high-temperature end gas of the turbine, energy consumption is lowered, and sediments in the reactor is removed through afterburning and temperature increasing of backflow end gas. The composite device has the advantages that removal efficiency for pollutants of NOx, SO2 and particles is high, limit values of emission regulations specified by domestic and abroad organizations such as IMO (international meteorological organization) can be met, and operation mode switching of ships in international waters and emission-controlled regions during sailing can be achieved.

A protonated g-C3N4/BiOBr heterojunction photocatalyst is flower-like particles consisting of flower-like BiOBr and flaky g-C3N4 growing on the flow-like BiOBr in situ. The photocatalyst is prepared with the following method: 1) calcining a precursor of g-C3N4 in air to obtain g-C3N4 photocatalyst particles; 2) dispersing the g-C3N4 photocatalyst particles in a hydrochloric acid solution, stirringthe solution at the normal temperature, and washing the g-C3N4 photocatalyst particles with deionized water to be neutral; 3) drying the g-C3N4 photocatalyst particles in the step 2 to obtain a protonated g-C3N4 photocatalyst; 4) dissolving the protonated g-C3N4 photocatalyst and bismuth nitrate in water, adding an acetate solution after stirring, adding potassium bromide and sodium acetate afterstirring at the room temperature, conducting an aging reaction after stirring, washing an obtained precipitate with water and absolute ethyl alcohol respectively, and then, performing centrifugationand drying to obtain the protonated g-C3N4/BiOBr heterojunction photocatalyst. The invention further discloses a preparation method of the catalyst.

The invention discloses a device and a method for treating obnoxious gas and industrial volatile organic compounds (VOCs). The device comprises a cylindrical insulation shell with an air inlet and an air outlet, an electrode connected with a high-voltage pulse power supply is arranged in the cavity of the insulation shell, and an adsorption layer which encircles the electrode and is made of active carbon fibers and a metal sheet which is grounded are sequentially attached to the inner wall of the insulation shell from inside to outside. By the invention, plasma reaction and active carbon fiber adsorption technology are combined, so that the retention time of the obnoxious gas or the industrial VOCs in the device is prolonged, and the treatment efficiency is improved; and in addition, active carbon fiber adsorption and regeneration are performed at the same time, so the service life of the active carbon fibers is greatly prolonged.

The invention discloses an in-situ chemical oxidation repairing method for organic matter contaminated groundwater. The method comprises the following steps of injecting a solution A into the organicmatter contaminated groundwater for maintenance for 6-18 hours, then injecting a solution B for maintenance for 2-6 hours, finally injecting a solution C for maintenance for 12-24 hours, and circularly repeating the steps above till groundwater contaminant detection satisfies standards; the solution A is a mixed solution of ferrate, an alkaline solution and a stabilizer; the solution B is a complexing agent aqueous solution; the solution C is hydrogen peroxide diluted with water. According to the method, ferrate is used for pre-oxidizing and encapsulating non-soluble reducing substances in a precipitation part to reduce the content of pollutants and reducing substances in the groundwater, and meanwhile ferrate provides iron ions for hydrogen peroxide to achieve a catalytic oxidation reaction, so that the effect of efficient removal of the organic pollutants is achieved. By applying the chemical method to in-situ chemical oxidation of the groundwater, a better oxidation effect can be achieved.

The invention belongs to the technical field of gas purification, and discloses a method for treating a gas containing hydrogen sulfide and carbonyl sulfide. The method is characterized by adopting an improved chelated iron absorbing solution, and comprises the following steps: transforming carbonyl sulfide into hydrogen sulfide under a catalysis function of heterocyclic amine, and transforming hydrogen sulfide in the gas into sulfhydryl ions by using the chelated iron absorbing solution in an absorbing process; and regenerating a pregnant solution absorbing hydrogen sulfide by virtue of air oxidization to transform the sulfhydryl ions into elemental sulfur which is harmless to an environment, wherein the heterocyclic amine is one or a mixture of more of 1,4-diazabicyclooctane, 1,2-dimethylimidazole, 1,4-dimethylpiperazine and triethylene tetramine. By adopting the chelated iron absorbing solution containing the heterocyclic amine, the efficiency of removing carbonyl sulfide is improved, the carbonyl sulfide removing rate is greater than 80 percent, and the hydrogen sulfide removing efficiency is greater than 99.9 percent.

A process for removing metals existing in the mode of nophthenate, especially calcium, from hydrocarbon oil includes mixing hydrocarbon oil with the aqueous solution of hydrochloric acid or nitric acid, water and demulsifier, emulsifying to change the metals into water-soluble ionic compound, and water-oil separation. Its advantages are low dosage of additive and high efficiency.

The invention provides a biological filter deodorizing device, which comprises an air inlet pipe, a biological filter tower, a centrifugal fan and an air discharge chimney. The device is characterized in that: the biological filter tower adopts a double-tower structure of circular inner and outer towers; the inside of the tower is filled with inorganic-organic mixed fillers; the upper part of the inner tower is provided with a ring-shaped air distribution channel; the upper part of the outer tower is provided with a ring-shaped air collection channel; the circumferences of the air distribution channel and the air collection channel are evenly provided with slotted type air outlets; the inner tower and the outer tower are communicated with each other by a lower part space; the air inlet pipe is communicated with an air inlet of the biological filter tower and the ring-shaped air distribution channel on the upper part of the inner tower; and an air inlet of the centrifugal fan is communicated with an air outlet of the biological filter tower and the ring-shaped air collection channel on the upper part of the outer tower, and an air outlet of the centrifugal fan is communicated with the air discharge chimney. The centrifugal fan pumps the biological filter tower, and a negative pressure is formed, thereby solving the problem of uneven air distribution and easy leakage of air existing in the prior device. The device also has the advantages of high removal rate, no secondary pollution, simple structure and convenient maintenance and management.

The invention relates to a series-type two-stage three-section aeration biofilter comprising an influent distributor pipe, an air input distributor pipe, an effluent pipe and filter materials in the cell body of the filter characerized in that the filter mainbody consists of a waste water pool, filters I, II and a back washing system, wherein a supporting layer 1 is arranged in the filter I as the bottom, a bio-filler layer 2 is arranged on the supporting layer 1, an aerated conduit 4 is arranged in the bio-filler layer 2; another supporting layer 1 is arranged in the filter II as the bottom, a bio-filler layer 3 is arranged on the supporting layer 1, an aerated conduit 5 is arranged in the bio-filler layer 3, and is branched to three section aerated conduits 6, 7, 8; the back washing system consists of an air compressor, a back washing drainage pipe 9 and a drainage pipe 10 after the waste water treatment. The device of the invention can improve the removal performance of the COD and ammonia nitrogen of the system using a lower running cost.

The invention discloses a screen dot structure and a preparation method thereof, a backlight module and a liquid crystal display device. The screen dot structure is arranged between a light guide plate and a reflection sheet. The screen dot structure comprises a plurality of scattering screen dots formed on the light guide plate in a protruding manner and an optical glue layer attached to the scattering screen dots and the reflection sheet. The thickness of the screen dot structure is 2 [mu]m-100 [mu]m. According to the invention, the protruding scattering screen dots are arranged on the light guide plate and are bonded to the reflection sheet through the optical glue layer, so that the screen dot function is simultaneously realized, the effect of supporting the interval between the light guide plate and the reflection sheet is achieved, the optical loss at interfaces is reduced, and the light extraction efficiency of the light guide plate is improved.

A method for producing a semiconductor device, polishing method, and polishing apparatus, suppressing occurrence of dishing and erosion in a flattening process by polishing of a metal film for constituting an interconnection of a semiconductor device having a multilayer interconnection structure. The production method includes the steps of: forming a passivation film exhibiting an action of inhibiting an electrolytic reaction of a metal at the surface of the metal film; selectively removing the passivation film on a projecting portion so as to expose the projecting portion of the metal film at the surface; removing the exposed projecting portion of the metal film by electrolytic polishing so as to flatten unevenness of the surface of the metal film; and removing the metal film present on an insulation film from the metal film with the flattened surface by electrolytic composite polishing combining electrolytic polishing and mechanical polishing so as to form an interconnection.

The invention relates to a reeling waste water deep treating method and an apparatus, the method comprises the following steps: A) the reeling waste water is passed through a grating well, then enters into an anaerobic pond, sawdust carbon is put into the anaerobic pond; B) effluent from the anaerobic pond enters into an aerobic contacting oxidation pond, the sawdust carbon is put into the anaerobic contacting oxidation pond; C) effluent from the anaerobic contacting oxidation pond enters into a sedimentation pond; naturally deposited activated sludge containing sawdust carbon is directly discharged or performed with backflow to the above anaerobic pond or/and aerobic contacting oxidation pond, a supernatant is lifted in the sedimentation pond to an anaerobic filter for treating; D) effluent from the anaerobic filter enters into a multifunctional biological active carbon tower; and E) effluent from the multifunctional biological active carbon tower enters into a clean water pond for recycling or directly discharging in a silk reeling workshop. The method and the apparatus have the advantages of low operation cost, high circular reuse rate, good water quality, simple operation management and the like, utilization rate of water resource can be increased, pollution of reeling waste water on environment can be mitigated, and the silkworm industry has a good and fast development.

The invention provides a catalytic denitrification method. The method is carried out in a microwave field. A used catalyst is a nickel-containing mixed metal oxide which is a Cu-Ni mixed metal oxide or a Ni-Fe mixed metal oxide, wherein preferably, when the molar weight of nickel in the nickel-containing mixed metal oxide is 1, the molar weight of copper or iron is 0.4-2.5. The method has the advantages that secondary pollution is avoided through microwave catalytic direct NO decomposition reaction; the process is simple, is convenient to operate and easy to control, is high in NO removal efficiency (the NO conversion rate can be 98.9%), strong in oxidation resistance and low in operating temperatures, is energy-saving and environment-friendly and is low in operating cost; the flue gases or waste gases treated by using the method can be directly up to the national emission standard.

The invention discloses a novel plate-typed impeller feeder which comprises a shell body, a plate-typed impeller arranged at the shell and a motor and also comprises a scavenger rotating shaft arranged at the shell body and at the lower side of the plate-type impeller; a scavenger is arranged at the scavenger rotating shaft which can be coupled with the rotating shaft of the plate-typed impeller. The invention arranges the scavenger at the lower side of the plate-typed impeller, which can conveniently and rapidly scavenge materials left on the plate-typed impeller in time, thus the phenomena such as material raising, influencing material conveying, secondary pollution, and the like, do not occur; the scavenging efficiency is high and the comprehensive effect is good.

The invention relates to a preparation method of an alpha-FeOOH nanorod-loading porous charcoal composite material, relates to a preparation method of the porous charcoal composite material, and aimsto solve the problems that an existing method for loading nano particles on a porous carbon material is high in cost, and nanoscale FeOOH particles are easy to agglomerate. The method comprises the following steps: (1) pyrolyzing and carbonizing a charcoal raw material; (2) cleaning the pyrolyzed and carbonized charcoal raw material, drying, immersing into an acidic oxidizing agent solution, heating, flushing, and drying to obtain a porous charcoal material; (3) immersing the porous charcoal material into a ferric salt water solution, stirring, adding a strong alkaline solution, uniformly mixing, putting mixed liquid into a reaction kettle, carrying out hydrothermal reaction, and finally vacuum drying to obtain the alpha-FeOOH nanorod-loaded porous charcoal composite material. Maize strawsas agricultural waste are low in price and easy to get, so that the cost is reduced when the maize straws are adopted as a carbon source. The preparation method of the alpha-FeOOH nanorod-loaded porous charcoal composite material, provided by the invention is applied to the field of biological composites.