97 results about "Phosphorus adsorption" patented technology

The invention discloses a sewage treatment method based on reinforcement of composite magnetic nanoparticles, and belongs to the technical field of sewage treatment, and the sewage treatment method comprises the following steps: 1, pretreatment: intercepting large-particle-size floating objects in wastewater by using a grid, and stirring by using an adjusting tank to uniformly mix water; in the second step, composite magnetic nanoparticles are added into the pretreated wastewater, and nitrogen and phosphorus adsorption and electric energy collection and storage are achieved at the same time; 3, separation: separating the composite particles through a magnetic separation device, and further purifying the wastewater through a sedimentation tank; 4, regeneration: forming an electric field by utilizing the collected electric energy, desorbing particles by combining with a neutral solution of an antibiotic degradation product, and recycling after cleaning; 5, standard reaching and energy consumption balance are carried out, the wastewater is disinfected, the water quality is monitored, the stirring speed and the power supply proportion are adjusted in a linkage mode, and standard emission and energy consumption self-balance are ensured. The method does not need to depend on microorganisms, particles and energy recycling, the treatment efficiency is high, and the operation cost is low.

The invention relates to the technical field of agricultural environment information, and discloses a rice field nitrogen and phosphorus loss amount remote regulation and control method oriented to environment data. The method comprises the following steps: acquiring historical nitrogen and phosphorus loss data, real-time meteorological data and water and fertilizer operation information of the rice field; constructing a mechanism constraint sub-model fusing nitrogen migration and transformation kinetics and phosphorus adsorption and desorption balance; performing multi-source feature extraction on the meteorological data to generate a standardized environment vector; inputting the lightweight residual convolutional neural network to output an initial prediction value; on-line fine adjustment is carried out through a Lagrangian multiplier method in combination with the mechanism model, and a corrected predicted value conforming to substance conservation is generated; and when the predicted value exceeds a threshold value, generating a drainage gate opening degree and fertilization plan adjustment instruction, and issuing the instruction to an edge terminal for execution through the narrowband Internet of Things.

The invention relates to the technical field of environmental functional materials, and discloses a preparation method of composite ceramsite with good nitrogen and phosphorus adsorption performance, and the preparation method specifically comprises the following steps: 1, preparing raw materials: preparing fly ash, bentonite and corn straw according to a mass ratio of 6: 3: 1 as the raw materials; 2, pretreatment: crushing the raw materials to 100 meshes, and drying at 105 DEG C for 24 hours; 3, balling: mixing fly ash, bentonite and corn straw powder according to a ratio of 6: 3: 1, adding deionized water, and stirring to form a ball, so as to prepare a raw material ball with a diameter of 5-7mm; 4, drying: drying the raw material nodules in an environment at 105 DEG C for 24 hours; 5, preheating: preheating the corn straws in a muffle furnace at 400 DEG C for 40 minutes, and pyrolyzing the corn straws to form holes; the power plant waste fly ash, the natural mineral bentonite and the agricultural waste corn straw are reasonably utilized, so that the production cost is reduced, resource utilization of the wastes is realized, and environmental protection is facilitated.

The invention provides a method for removing phosphorus from a cobalt sulfate solution. The method comprises the following steps: providing a cobaltous sulfate solution to be treated; the method comprises the following steps: mixing a to-be-treated cobaltous sulfate solution, a composite polymer soluble ferric salt and a coagulant aid, carrying out precipitation reaction, and separating to obtain phosphorus-containing slag and cobaltous sulfate primary purified liquid; a deep phosphorus removal adsorbent is adopted to adsorb trace phosphorus in the cobalt sulfate primary purification liquid, then trace iron in the cobalt sulfate primary purification liquid generates precipitates in an oxygen-containing atmosphere, and after separation, a cobalt sulfate secondary purification liquid is obtained. According to the method, firstly, the synergistic effect of the composite polymer soluble ferric salt and the coagulant aid is adopted, and primary efficient removal of phosphorus is achieved; then, a deep phosphorus removal adsorbent is used for directionally adsorbing trace phosphorus in the cobalt sulfate primary purification liquid, so that deep removal of phosphorus is further realized; and finally, the residual trace iron is precipitated and separated in the oxygen-containing atmosphere, so that the purity of the secondary purified cobalt sulfate liquid is further guaranteed.

The present application relates to the field of dephosphorization adsorbent, disclose a kind of modified hydrotalcite adsorbent and its preparation method and application, the adsorbent includes hydrotalcite and / or hydrotalcite-like compound with lamellar structure, and modification component;The modification component includes the first metal component modified on the layer of the hydrotalcite and / or hydrotalcite-like compound, and the second metal component modified in the interlayer of the hydrotalcite and / or hydrotalcite-like compound;Wherein, the first metal component is selected from transition metal and / or rare earth metal;The second metal component is selected from at least one of alkali metal.By metal modification in the layer and interlayer of hydrotalcite and / or hydrotalcite-like compound, the selectivity of adsorbent for phosphate in water can be effectively improved, and the phosphorus capacity is high, and has excellent effect in the application of dephosphorization in complex water.

This invention discloses a precision treatment system and control method for farmland non-point source phosphorus pollution based on enrichment and reuse, comprising a water control unit, a purification unit, a desorption unit, and a power supply unit; the purification unit is installed inside the water control unit, and the desorption unit is connected externally to the water control unit; the water control unit is used for water flow control; the purification unit is used to purify farmland non-point source polluted water, and the purification unit includes directional phosphorus adsorption matrix filler, which is lanthanum-based coated molecular spheres and lanthanum-based coated molecular bricks; the desorption unit is used to perform desorption when the phosphorus adsorption capacity of the purification unit is saturated; the power supply unit is used to supply power to the system; thus, precision treatment of farmland non-point source phosphorus pollution based on enrichment and reuse is achieved.

The invention discloses a magnesium-doped calcium carbonate adsorbent and a preparation method and application thereof, the chemical formula of magnesium-doped calcium carbonate is as shown in the following formula (1): MgxCa1-x (CO3), x represents the molar ratio of magnesium to calcium, 0 lt; xlt; and 0.200%. Compared with pure calcium carbonate, the adsorption rate of the adsorbent based on the magnesium-doped calcium carbonate material provided by the invention is greatly improved, so that passivation of the pure calcium carbonate in the early stage of adsorption is relieved. Under the condition of the same phosphorus adsorption amount, the adsorption rate of the adsorbent is obviously improved. Alternatively, under the same adsorption time, the phosphorus adsorption amount of the adsorbent provided by the invention is obviously improved. The adsorbent provided by the invention has good adsorption selectivity (competitive ion interference resistance), so that the adsorbent has high practical application value. In addition, as the preparation is simple and convenient and the cost is low, the compound can be used as an agricultural fertilizer slow-release agent, can maintain the phosphorus content in farmland for a long time, and is more beneficial to the growth of crops.

The invention relates to the technical field of wastewater treatment materials, in particular to a preparation method of a nano-hydroxyapatite-based composite material, which comprises the following steps: selecting high-density polyethylene as a continuous phase matrix material and nano-hydroxyapatite as a functional filler, adding a silane coupling agent as an interface modifier, and carrying out hydrophilic modification through a hydrophilic agent to obtain the nano-hydroxyapatite-based composite material. The composite material is obtained through nano-hydroxyapatite pretreatment, melt blending, physical foaming and molding processing. The composite material is applied to an MBBR (Moving Bed Biofilm Reactor) for wastewater treatment; the compressive strength of the obtained composite material is greater than or equal to 15 MPa, and the annual wear rate lt Meanwhile, the microporous structure of the nano-hydroxyapatite provides a large number of active sites for microorganism attachment, the biological membrane quantity of the system can reach 35 g / L, the ammonia nitrogen removal rate is increased by 30-50% compared with the prior art, and the phosphorus adsorption capacity reaches 8-10 mg / g.

The invention belongs to the technical field of industrial and agricultural waste recycling, and particularly relates to a method for recycling biogas slurry nutrients by mechanically and chemically activating anaerobic biogas residue biochar. According to the method, magnesium oxide desulfurization residues and oxalic acid are used as grinding aids, and biochar is activated by using a mechanochemical technology, so that the content of water-soluble phosphorus in the biochar is increased, and the water-soluble phosphorus is used as a phosphorus source of an MAP reaction. Meanwhile, Mg < 2 + > in MDWR provides a magnesium source for MAP reaction. The particle size of the activated biochar is reduced, the specific surface area is increased, the activated biochar can be used as a seed crystal to accelerate struvite crystal formation, and the nitrogen and phosphorus adsorption performance is improved by increasing the specific surface area; and finally, synergistically recovering nitrogen and phosphorus nutrients in the biogas slurry through MAP chemical precipitation and physical adsorption of activated biochar. According to the method, the process for recycling the biogas slurry nutrients by using the mechanochemical activated charcoal is obvious in recycling effect. The problem of disposal of two wastes of biogas slurry and biogas residue in an agricultural pig farm is solved, and an innovative process is provided for resource utilization of industrial and agricultural wastes.

The invention discloses a phosphorus-loaded catalyst regeneration waste liquid recovery treatment method and a phosphorus-loaded catalyst regeneration waste liquid recovery treatment device, and aims to better control the acidity of a regeneration liquid so as to maintain the service life of a phosphorus-loaded catalyst and realize the cyclic utilization of the regeneration liquid and the reduction concentration of phosphorus resources. And the treatment difficulty of the regenerated waste liquid can also be reduced. Comprising the following steps: introducing the phosphorus-loaded catalyst regeneration waste liquid into an adsorption device filled with a regeneration waste liquid dephosphorization adsorbent, separating a phosphorus component in the phosphorus-loaded catalyst regeneration waste liquid, collecting an effluent as a phosphorus-poor regeneration liquid, and recycling the phosphorus-poor regeneration liquid for regeneration of the phosphorus-loaded catalyst, after the regeneration waste liquid dephosphorization adsorbent is saturated in adsorption, hot water is adopted as a desorption medium to replace the stored liquid in the adsorption device, the volume of the desorption medium is controlled to be smaller than the volume of the phosphorus-carrying catalyst regeneration waste liquid capable of being contained in the adsorption device, and the regeneration waste liquid dephosphorization adsorbent is eluted.

The invention discloses a nitrogen and phosphorus adsorbent and a preparation method and application thereof, and belongs to the technical field of environmental protection and resource utilization. The preparation method comprises the following steps: uniformly mixing coal gangue powder with NaOH, calcining, adding water, carrying out hydrothermal reaction with NaAlO2, washing, centrifuging, and drying to obtain CGMS; the preparation method comprises the following steps: preparing a sodium alginate solution, adding CGMS into water to obtain a CGMS solution, adding a sodium alginate solution into the CGMS solution, then adding a NiCl2 solution, and finally adding a glutaraldehyde solution to obtain a mixed solution, stirring, centrifuging, washing and drying to obtain SA-CGMS; and finally, mixing the sludge with SA-CGMS, drying, carrying out ball milling on the dried material, screening, granulating into balls, drying, and finally calcining to obtain the nitrogen and phosphorus adsorbent. The nitrogen and phosphorus adsorbent prepared by the invention has the nitrogen and phosphorus resistance and control of 90% or more, and can significantly reduce the leaching loss of nitrogen and phosphorus. And after being continuously used for 6-8 years, the nitrogen-phosphorus adsorbent is applied to the permeable control layer, so that the soil fertility of the barren farmland in the karst region can be increased, carbon sequestration can be realized, and heavy metals and antibiotic pollutants in a plough layer can be adsorbed.

The present application relates to the field of agricultural environmental information technology, and discloses a remote control method for nitrogen and phosphorus loss amount of paddy field facing environmental data. The method comprises the following steps: obtaining historical nitrogen and phosphorus loss data, real-time meteorological data and water and fertilizer operation information of the paddy field; constructing a mechanism constraint sub-model combining nitrogen migration and transformation dynamics and phosphorus adsorption and desorption balance; performing multi-source feature extraction on the meteorological data to generate a standardized environmental vector; inputting the light residual convolutional neural network to output an initial prediction value; combining the mechanism model to generate a corrected prediction value conforming to the conservation of mass through the Lagrange multiplier method; when the prediction value exceeds the threshold value, generating a drainage gate opening degree and a fertilizer plan adjustment instruction, and delivering the instruction to an edge terminal for execution through a narrowband Internet of Things.

According to the multifunctional emergency phosphorus removal aeration device for the lake, the phosphorus removal system is adopted, sewage to be treated is guided into the water inlet pipe after being preliminarily filtered, more than 90% of phosphorus can be removed from the sewage passing through the biological filter layer under the action of the phosphorus adsorption plate, and the water after phosphorus removal is guided into the system, so that the sewage can be recycled. Under the action of oxygen bubbles generated by the aeration pipe grid, microorganisms released by the bottom microorganism particle slow release tank are diffused into a large water area, so that the treatment of eutrophicated rivers and lakes is improved. The aeration system is simple in structure and convenient to use, the aeration system is not provided with a mechanical rotating part in water, the water body is not vibrated violently, organisms in the water body are not damaged, the water body is not easily stirred, deposited pollutants are not easily released into the water body again, and on the other hand, a biological filtering layer formed by microorganisms attached to the ceramsite layer is low in price, resistant to corrosion, light in weight and convenient to use. The porous surface area is large, the stress resistance is good, and the generalizability is high.

The invention discloses a La-Fe bimetal organic framework derived heterojunction material anode and a preparation method and application thereof, and belongs to the technical field of phosphorus adsorption materials. The preparation method of the La-Fe bimetal organic framework derived heterojunction material comprises the following steps: (1) mixing ferric salt, lanthanum salt, terephthalic acid and an organic solvent, and carrying out solvothermal reaction to obtain a La-Fe bimetal organic framework precursor material; and (2) carrying out calcination derivation on the La-Fe bimetal organic framework precursor material in an inert atmosphere to obtain the La-Fe bimetal organic framework derived heterojunction material. The preparation method is simple and low in cost, and the prepared La-Fe bimetal organic framework derived heterojunction material anode has the advantages of being high in adsorption capacity, high in adsorption rate, high in selectivity, wide in pH application range and the like on phosphate.

The application discloses a phosphorus-carrying catalyst regeneration waste liquid recycling treatment method and device, and aims to solve the technical problem of how to better control the acidity of the regeneration liquid to maintain the service life of the phosphorus-carrying catalyst, realize the recycling of the regeneration liquid and the concentration reduction of the phosphorus resource, and reduce the treatment difficulty of the regeneration waste liquid. The method comprises the following steps: introducing the phosphorus-carrying catalyst regeneration waste liquid into an adsorption device filled with a regeneration waste liquid phosphorus removal adsorbent, separating the phosphorus component in the phosphorus-carrying catalyst regeneration waste liquid, collecting the effluent as a phosphorus-lean regeneration liquid, recycling the phosphorus-lean regeneration liquid for the regeneration of the phosphorus-carrying catalyst, and mainly using the phosphate as the phosphorus component; when the regeneration waste liquid phosphorus removal adsorbent is saturated, hot water is used as a desorption medium to replace the liquid in the adsorption device, the volume of the desorption medium is controlled to be less than the volume of the phosphorus-carrying catalyst regeneration waste liquid that can be contained in the adsorption device, and the regeneration waste liquid phosphorus removal adsorbent is eluted.

The invention relates to the technical field of sewage treatment, and discloses an artificial wetland and a carbon source intelligent regulation and control method thereof. The constructed wetland comprises an artificial medium composite layer, a carbon source regulation and control mechanism, a water inlet mechanism and a water outlet mechanism. The artificial medium composite layer comprises a diversion layer, a reaction layer and a precipitation layer which are sequentially arranged from top to bottom, the reaction layer is provided with a mounting module, and a carbon source is arranged in the mounting module; the carbon source regulation and control mechanism comprises a carbon source storage device, an extraction device and a conveying device, one end of the conveying device is connected with the carbon source storage device, and the other end is connected with the mounting module; the water inlet mechanism is connected with the diversion layer; the water outlet mechanism is connected with the precipitation layer. A carbon source is provided for the mounting module through the carbon source regulation and control mechanism, and the carbon source is sufficient when the artificial medium composite layer treats sewage. The carbon source regulation and control mechanism can control and regulate the supply speed of the carbon source, can control the denitrification process to be efficiently carried out, inhibits the phosphorus adsorption saturation phenomenon, and is higher in nitrogen and phosphorus removal efficiency of the constructed wetland.

The invention relates to the technical field of water treatment materials and resource recovery, in particular to a chitosan-based hydrogel ball as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing an acidic aqueous solution of chitosan with soluble ferric salt to obtain an M-chitosan solution; wherein the metal salt is selected from soluble ferric salt or a mixture of soluble ferric salt and soluble calcium salt; the M-chitosan solution forms charged liquid drops by adopting electronic injection treatment, the charged liquid drops are dropped into alkaline solidification liquid, and the chitosan-based hydrogel balls are obtained after solidification treatment. The chitosan-based hydrogel ball prepared by the preparation method provided by the invention solves the bottleneck that a traditional phosphorus removal adsorbent is difficult to have efficient adsorption performance and recoverability at the same time. Besides, the chitosan-based hydrogel ball can be applied as a fertilizer after adsorbing phosphorus, so that a'pollution control-resource recovery 'closed loop is realized, and the chitosan-based hydrogel ball has the dual functions of efficient phosphorus removal and agricultural recycling.

The invention discloses an integral phosphorus removal adsorbent based on a fibrous inorganic mineral material, a preparation method of the integral phosphorus removal adsorbent and application of the integral phosphorus removal adsorbent to removal of phosphorus in an aqueous solution. According to the invention, a fibrous inorganic mineral material with the size of more than centimeter level is used as a carrier, a non-noble metal salt is used as a precursor, non-noble metal hydroxide is formed through in-situ deposition, and the non-noble metal hydroxide is uniformly attached to the surface of the fibrous inorganic mineral material, so that the integral phosphorus removal adsorbent is directly obtained without further molding. The preparation process is simple, the material source is wide, the cost is low, and large-scale preparation is easy. The obtained adsorbing material can effectively remove trace phosphorus in water, has high phosphorus removal capacity and rapid adsorption kinetics, can realize an excellent treatment effect in a wide concentration and pH range, and can be recycled.

The invention discloses an iron / calcium modified chlorella biochar material for removing phosphorus from mariculture tail water, which comprises chlorella biomass powder, a Fe source, a Ca source and polyethylene glycol 4000, and nitrogen is used as a protective gas in the preparation process. The catalyst is prepared through the steps of chlorella biomass pretreatment, Fe / Ca impregnation liquid preparation, biomass impregnation and pretreatment, anaerobic pyrolysis and the like, the porous structure and the positive electricity surface of the catalyst can strengthen phosphorus adsorption, and phosphorus is removed through the synergistic effect of electrostatic adsorption, ligand exchange, chemical precipitation and physical interception; when the pH value is 3-11 and the salinity is 5-40 per thousand, the phosphorus removal efficiency is high. When in use, the phosphorus removal rate of the tail water reaches 93% or above, the tail water tends to be saturated within 4 hours, the phosphorus concentration of the treated tail water can meet the first-grade discharge standard of 0.5 mg / L or below, meanwhile, resource utilization of the chlorella breeding waste is achieved, additional transfer treatment materials are not needed, and the operation cost and time are saved.

The present invention discloses a cerium-based metal-organic framework material containing defective sites, its preparation method, and application, and belongs to the field of phosphorus adsorption materials. The preparation method of the cerium-based metal-organic framework material containing defective sites of the present invention comprises the following steps: dissolving ammonium cerium nitrate and terephthalic acid in water and an organic solvent, respectively, and then mixing them, then mixing them with a monocarboxylic acid, and performing a solvothermal reaction to obtain the cerium-based metal-organic framework material containing defective sites. The preparation method of the present invention is simple and low-cost; the prepared cerium-based metal-organic framework material containing defective sites has the advantages of large phosphorus adsorption capacity, fast adsorption rate, high selectivity, and a wide pH range of application.

The utility model discloses a denitrification deep bed filter, which comprises a filter body, a filter material layer and a water distribution system, the filter material layer is composed of alternately stacked composite biological filter material modules, and the water distribution system comprises a multi-stage rotational flow water distribution structure and a turbulent flow strengthening unit. Through alternately stacked composite biological filter material modules and a multi-stage rotational flow water distribution structure, in combination with a turbulent flow strengthening unit and a precise carbon source adding system, the problems of limited nitrogen and phosphorus removal efficiency, high energy consumption and poor water quality adaptability of a traditional process are solved. The active coke layer improves SS interception and biological membrane enrichment capability, and the volcanic rock coating enhances phosphorus adsorption; the hydrodynamic mixing efficiency is enhanced through rotational flow water distribution and baffling gradient pore design, and the utilization rate of a carbon source is increased by 15% in cooperation with dynamic carbon-nitrogen ratio control. Therefore, the stable advanced treatment effect that the effluent TN is smaller than or equal to 12 mg / L, the TP is smaller than or equal to 0.5 mg / L and the SS is smaller than or equal to 10 mg / L is achieved, the energy consumption of the system is reduced to 0.28 kWh / m, the backwashing period is prolonged by 34% 4, and the comprehensive advantages of efficient nitrogen and phosphorus removal, low operation cost and high working condition adaptability are achieved.

The invention provides an integrated system and method for nitrogen and phosphorus removal of high-speed train source separation urine. The system comprises a source separation closestool and a coaxial integrated three-stage reactor which are connected with each other, the source separation closestool is used for separating excrement and urine from the source and conveying the separated urine to the coaxial integrated three-stage reactor; the coaxial integrated three-stage reactor comprises an inner layer, a transition area a, a middle layer, a transition area b and an outer layer which are sequentially connected from inside to outside; wherein sponge filler inoculated with microorganisms is arranged in the inner layer; the top of the inner layer is provided with a connecting port communicated with the transition area a; a connecting port communicated with the middle layer is formed in the bottom of the transition area a, an MABR membrane assembly is arranged in the middle layer, and the middle layer is further connected with an air blower; the top of the middle layer is provided with a connecting port communicated with the transition area b; a connecting port communicated with the outer layer is formed in the bottom of the transition area b, and a filter element filled with a dephosphorization adsorbent is arranged in the outer layer.

This invention discloses a method and system for rural sewage treatment and the utilization of sludge and phosphorus resources, relating to the field of rural sewage treatment technology. It addresses the problem of ineffective in-situ utilization of sludge in existing indirect rural sewage resource utilization systems, where sludge thickening tanks are not effectively utilized and phosphorus resources are wasted. This invention pre-treats rural domestic sewage by filtering out large particles, then treats it in an equalization tank before sending it to a biological treatment unit. The effluent from the biological treatment unit is introduced into an constructed wetland for further treatment and reuse as greywater. The remaining sludge discharged from the biological treatment unit is discharged into a phosphorus adsorption tank. The phosphorus-removed sludge is then concentrated in a sludge thickening tank. The concentrated sludge is made into ceramsite, which replaces the ceramsite packing material in the constructed wetland and phosphorus adsorption tank. The displaced phosphorus-containing ceramsite is used as fertilizer for returning to the fields. This invention features simple and reasonable process steps, low cost, proper sewage treatment, and the ceramsite made from sludge adsorbing phosphorus can be used as farmland fertilizer, effectively utilizing sludge and phosphorus in situ.

The invention relates to an after-finishing process of microporous fiber cloth, which is characterized in that the microporous fiber cloth is subjected to assistant functional finishing by adopting an impregnation method, so that the microporous fiber cloth has a loading function; the fiber cloth is impregnated in a liquid tank by adopting an auxiliary agent, and the method comprises auxiliary agent preparation operation and padding operation. The auxiliary agent comprises a finishing agent, and the finishing agent is prepared from a composite catalytic material and water or a titanium zirconium phosphate adsorption material and water; according to the padding operation, the fiber cloth is soaked in a liquid tank for dipping adsorption, a dipping liquid is obtained by adding a nonionic cross-linking agent into a dispersed particle liquid, under the condition that the pH is alkaline, the mode of two times of dipping and two times of padding is adopted, and the padding rate is 70%-75%; according to the after-finishing mode of the scheme, catalytic material particles are embedded into fiber micropores through physical adsorption, the prepared micropore fiber cloth is subjected to a formaldehyde catalytic oxidation reaction through a loaded catalytic material, formaldehyde is decomposed, and indoor air is purified; and a titanium zirconium phosphate adsorption material can also be loaded, so that the binding sites of bacteria and viruses are improved, and the bacteria and viruses are better killed.

The utility model discloses a composite wetland nitrogen and phosphorus adsorption water quality restoration device which comprises a bottom plate, a water suction pump is fixedly installed on the upper surface of the bottom plate, a purification box is fixedly connected to the upper surface of the bottom plate, the input end of the water suction pump is fixedly communicated with a connecting pipe, and the right end of the connecting pipe is communicated with the upper surface of the purification box. According to the device, through cooperation of a water pump and a connecting pipe, a water source can be pumped to flow into a purification box to purify and restore the water source, and through arrangement of a filter plate, silt in water can be filtered out, so that the silt is prevented from blocking an activated carbon filter plate, and the situation that the filtering effect is affected is avoided; according to the water purification device, impurities, nitrogen and phosphorus in water can be preliminarily adsorbed, nitrogen and phosphorus in water can be adsorbed again by arranging a zeolite plate, so that a water source is further purified, and through cooperation of a baffle, an upper cavity, a lower cavity and a shifting block, a user can conveniently shift the baffle, so that a filter plate is cleaned.

Provided in the present application are a phosphorus adsorption material, and a preparation method therefor and the use thereof. The phosphorus adsorption material comprises a porous composite material, wherein the porous composite material comprises porous biomass carbon and polymer fibers at least partially wound around the porous biomass carbon; and the porous composite material contains several amino groups, at least some of which bind to iron ions. Moreover, the phosphorus adsorption material satisfies the following conditions: 0.36 nm≤d002≤0.43 nm, 0.85≤ID / IG≤1.38, B≥240 m2 / g, and 0.20 cm3 / g≤V≤0.56 cm3 / g, wherein d002 represents the interlayer spacing of graphite-like microcrystallites in the phosphorus adsorption material; B represents the specific surface area of the phosphorus adsorption material; and V represents the total pore volume of the phosphorus adsorption material. The phosphorus adsorption material provided in the present application has a high theoretical adsorption capacity for a phosphorus-containing water body having a high or low phosphorus concentration, and can be regenerated and reused.

The invention relates to the technical field of environmental science, and discloses a soil phosphorus adsorption capacity evaluation method based on machine learning, which comprises the following steps: S1, firstly obtaining adsorption model parameter estimation results of multiple groups of phosphorus in different types of soil media and main physicochemical property data of soil, S2, preprocessing the obtained data, S3, establishing multiple machine learning models, and S4, evaluating the phosphorus adsorption capacity of the soil according to the machine learning models. Based on main physicochemical properties of the soil, predicting main parameters of the soil phosphorus adsorption model, S4, selecting an optimal machine learning model; s5, the optimal machine learning model is used for evaluating the phosphorus adsorption capacity of the regional soil, a large amount of data can be rapidly processed by adopting the machine learning model, a prediction result is given, the evaluation efficiency is improved, a time-consuming phosphorus adsorption experiment does not need to be conducted on each new soil sample, and therefore the sample testing cost is reduced, and the method is suitable for popularization and application. The adsorption parameters can be quickly predicted through the trained model only by measuring key physicochemical properties which are relatively easy to obtain, so that the detection speed is greatly improved.

The present application belongs to the field of spectral analysis and intelligent detection technology, and discloses a soil available phosphorus content hyperspectral imaging rapid detection method and system. The method sequentially performs adaptive baseline correction, target-oriented orthogonal signal correction combined with fractional order differential transformation phosphorus response enhanced multi-order feature extraction, sparse Bayesian sensitive band selection based on mutual information graph Laplace regularization, multi-scale hollow causal convolution regression network prediction of phosphorus adsorption state perception, and temperature and humidity environment compensation correction fused with Kubelka-Munk diffuse reflection theory physical constraints. The physical reasonableness of shared coding features is constrained by bidirectional cross-attention fusion of spectral and spatial features and phosphorus adsorption state classification auxiliary task, and the available phosphorus content, confidence interval and adsorption state type judgment result are output.

The invention belongs to the technical field of red mud solid waste utilization, and particularly discloses a method for preparing a magnetic targeted phosphorus removal material through red mud in-situ crystallization and application of the magnetic targeted phosphorus removal material. The phosphorus removal material provided by the invention is prepared from the following raw materials in parts by mass: 85 to 95 parts of red mud, 10 to 20 parts of water and 1 to 4 parts of glucose. The phosphorus removal material has a composite structure of Fe3O4 magnetic core + Al (OH) 3 adsorption layer + SiO2 skeleton, has high phosphorus removal capacity and high magnetic saturation intensity, can still obtain better phosphorus removal performance after adsorption saturation through simple regeneration treatment, can be repeatedly used for 5-8 times at most, and greatly reduces the operation cost. The invention also provides a preparation method and application of the phosphorus removal material, the preparation process does not need high-temperature roasting, does not need additional addition of a magnetic reagent and an acid-base modifier, only utilizes the strong basicity of the red mud and iron and aluminum components, and takes glucose as a mild reducing agent to generate a composite structure of a magnetic core and a phosphorus removal adsorption layer in situ.

The invention belongs to the technical field of environmental pollution abatement and recycling, and particularly relates to a multi-metal composite modified charcoal phosphorus adsorption material, a preparation method, a device and application, the adsorption material is prepared from the following raw materials by mass percent: 40%-75% of charcoal, 10%-25% of bentonite, 5%-15% of light magnesium oxide, 5%-15% of anhydrous and 1%-8% of ferric trichloride hexahydrate. And 0.5%-5% of zirconium oxychloride octahydrate. The preparation method comprises the following steps: uniformly mixing the raw materials, calcining and the like to prepare the granular filter material, and the phosphorus adsorption capacity of the filter material can reach 50-80mg / g. After adsorption saturation, the filter material rich in nutrient elements such as phosphorus, calcium, magnesium and iron can be directly applied as an agricultural slow-release fertilizer and a soil conditioner, so that resource utilization of pollutants is realized, and the filter material has multiple advantages of efficient phosphorus adsorption, soil improvement and resource recovery and has remarkable economic and environmental benefits.