71 results about "Contaminated groundwater" patented technology

The invention relates to an organic combined polluted underground water in-situ remediation method based on a micro-nano iron-based material. The method comprises the following steps: acquiring underground water pollution information; establishing a composite reaction zone at a preset position, and constructing a reduction-oxidation chain reaction system; and operating the composite reaction zone, collecting monitoring data, and optimizing the composite reaction zone until the composite pollution is degraded and removed to a preset value. Through series reaction of powerful reduction of the micro-nano iron-based material and advanced oxidation of the iron-based activated persulfate, the performance of the micro-nano iron-based material serving as a strong reduction material and an active agent is fully played, pollutants such as halogenated hydrocarbon in underground water are sequentially subjected to reduction degradation, pollutants such as benzene series and volatile phenol are sequentially subjected to oxidative degradation, and the pollution to the underground water is reduced. Effective management and control of underground water combined pollution of medical and chemical parks and enterprises are realized; a monitoring well is configured based on a composite reaction zone, and remediation materials are discontinuously added in combination with management and control conditions, or other management and control materials are flexibly selected, so that long-term management and control of groundwater pollution risks are realized.

A polyelectrolyte-surfactant complex, a method of removing a toxic substance from contaminated soil or contaminated groundwater using a polyelectrolyte-surfactant complex and a method of making a polyelectrolyte-surfactant complex. The polyelectrolyte-surfactant complex is made from a complexated recombinant intrinsically disordered protein that has been electrostatically conjugated to an anionic surfactant to provide enhanced liquid-liquid phase separation properties.

The present application relates to the technical field of groundwater pollution remediation, and particularly relates to a method and device for in-situ remediation of hexavalent chromium contaminated groundwater, wherein the device comprises a multifunctional well group, a medicament supply system, an aeration system, a monitoring system and a control system; the multifunctional well group comprises a plurality of multifunctional wells; the medicament supply system is used for pretreating medicaments, modified composite reducing agents and composite functional bacteria liquid respectively; the control system is used for receiving monitoring data; the control system is also used for displaying monitoring data and equipment operating states, and setting operating parameters by a user; the control system is also used for automatically adjusting medicament dosing amount, aeration flow and aeration pressure according to monitoring data and operating parameters set by the user. Through the design of the multifunctional well group, the medicament supply system and the aeration system, the hexavalent chromium contaminated groundwater can be simultaneously subjected to chemical reduction, biological reinforcement and adsorption fixation, so that the three processes are coordinated to realize rapid, efficient and long-acting remediation of the hexavalent chromium contaminated groundwater.

This invention belongs to the field of wastewater treatment technology and discloses a mechanical catalytic treatment method and system for wastewater and contaminated groundwater. The mechanical catalytic treatment method for wastewater and contaminated groundwater includes the following steps: adding a treatment agent to the wastewater to be treated, mixing and reacting, filtering, and completing the wastewater treatment; wherein, the treatment agent includes at least one of piezoelectric catalytic material and magnetic resin; the mixing reaction is carried out under ultrasonic cavitation and / or spiral aeration conditions; the piezoelectric catalytic material includes a porous plant cellulose fiber carrier and a C3N5 functional layer in situ grown on the surface of the carrier; the magnetic resin includes a benzo-melamine-formaldehyde resin matrix with sulfonic acid groups bonded to a benzene ring and Fe3O4 magnetic nanoparticles uniformly dispersed in the resin matrix. This invention eliminates the need for chemical agents in wastewater treatment, avoids secondary pollution, effectively treats complex water bodies while reducing operating costs, and possesses good environmental friendliness and practicality.

The purpose of the invention is to provide in situ treatment and flow diversion of contaminated groundwater without the need for an external energy source. The primary means by which contaminated groundwater is treated in situ within a subsurface environment is through the use of the modular SubflowRx and interrelated components that work together or independently to control groundwater flow outside the system as well as diverting contaminated groundwater inside the system for extended treatment. The present disclosure provides embodiments, examples, and advantages of how the components work to achieve this common purpose.

The application provides a low-permeability stratum contaminated groundwater remediation device and method, which comprises an industrial computer, the industrial computer is used for controlling the working state of an extraction mechanism according to the information inside a pumping well, a first monitoring mechanism and a second monitoring mechanism monitor the concentration change of groundwater pollutants, and feed back the groundwater pollution condition to the industrial computer, the extraction mechanism extracts groundwater into the inside of a groundwater purifier for treatment, and a transmission mechanism changes the position of the extraction mechanism according to the distribution of the groundwater pollutants; the low-permeability stratum contaminated groundwater remediation device and method have the advantages of improving the groundwater extraction efficiency, effectively improving the extraction effect of the groundwater pollutants, and reducing the operation cost of the groundwater extraction.

The application discloses an in-well treatment device and method for LNAPL contaminated groundwater remediation, and the treatment device comprises a power supply module unit, which is positioned and hung on the edge of a well mouth; a reaction module unit, which is arranged in the well; the reaction module unit comprises a reaction module shell and a reaction inner container, the side of the reaction module shell is a groundwater inlet, the reaction inner container is arranged in the reaction module shell, and the bottom of the reaction inner container is an ultrafiltration membrane assembly; and a driving module unit, which is arranged below the reaction module unit. The treatment device is installed in the well space, and when running, a vortex is formed below the treatment device, and then the LNAPL pollutants floating on the surface of the groundwater are introduced into the reaction inner container from the side of the reaction module shell, and the water molecules of the LNAPL pollutants removed by the reaction inner container are reflowed into the well, so that the pump and the ground treatment system are not needed, and the defects of high energy consumption and large disturbance of the traditional extraction treatment technology are effectively avoided.

The application provides a groundwater in-situ remediation system and method of multiple biological permeation reaction wall coupling ultrasonic waves and plant remediation, the groundwater in-situ remediation system comprises a multiple biological permeation reaction wall, a PLC control system and an artificial plant ecological remediation area, the multiple biological permeation reaction wall is arranged in a funnel-gate type engineering, the funnel part blocks the contaminated groundwater through a vertical cement curtain, an ultrasonic generator module is arranged in front of the gate part of the multiple biological permeation reaction wall, the multiple biological permeation reaction wall is divided into two layers, the filling material of the first layer permeation reaction wall is mainly composed of zero-valent iron, iron oxide and construction waste, the filling material of the second layer biological permeation reaction wall is mainly composed of high-performance biological adsorption zeolite and ORC slow-release material calcium peroxide, a microbial bacteria liquid injection pipe is arranged in the second layer biological permeation reaction wall, and monitoring wells are arranged on the two sides of the multiple biological permeation reaction wall and the artificial plant ecological remediation area.The application can treat and remediate multiple composite pollutants at a time, and the pollutant degradation efficiency is improved.

The invention discloses a preparation method of a biomass-based slow-release agent for repairing polycyclic aromatic hydrocarbon polluted underground water, which comprises the following steps: 1, preparation of soybean milk fermentation liquor: weighing soybeans, soaking the soybeans in ultrapure water according to a solid-to-liquid ratio of 1: 20-1: 50 for 12-48 hours, pulping, and adding ultrapure water until the volume is 500mL to obtain a soybean milk matrix; inoculating 10mL of polycyclic aromatic hydrocarbon polluted underground water indigenous microorganism bacterial liquid into the soybean milk matrix, and carrying out closed fermentation under a constant-temperature oscillation condition, 2, preparation of a multifunctional composite slow-release agent: weighing 35-60 parts by weight of FeSO4. 7H2O, 1-5 parts by weight of rhamnolipid, 5-10 parts by weight of humic acid, 1-5 parts by weight of methionine, 5-10 parts by weight of peanut peptide, 1-10 parts by weight of soybean lecithin, 3-10 parts by weight of a yeast extract and 40-60 parts by weight of the soybean milk fermentation broth prepared in the step 1; the method has the beneficial effects that the degradation efficiency on organic pollutants such as polycyclic aromatic hydrocarbon is remarkably enhanced, and a reliable material basis and theoretical support are provided for engineering application of an underground water bioremediation technology.

The application discloses a process for treating contaminated underground water based on an internal circulation ozone contact reaction tower, which comprises the following steps: S1, preliminary treatment; S2, ozone contact reaction; introducing the water to be treated into a water inlet of the tower body, and injecting ozone gas into an inner cylinder to promote the water flow in the inner cylinder to flow from bottom to top to the two filling layers and then to circulate back to the inner cylinder; S3, aeration treatment; and S4, sedimentation and filtration; the process for treating sewage by using the internal circulation ozone contact reaction tower can optimize the gas-liquid mass transfer effect, the flow state of ozone is smoother, the ozone utilization rate is increased by more than 25%, and the treatment effect on sewage can be improved through the setting of the whole process.

The present application relates to the technical field of sewage treatment, and discloses a composite material composition for groundwater remediation, a composite material, and a preparation method and application thereof.The composition contains modified nano zero-valent iron, cobalt chloride modified biochar, attapulgite, persulfate, and a binder; the mass ratio of the modified nano zero-valent iron, the cobalt chloride modified biochar, the attapulgite, the persulfate, and the binder is 1:2-6:0.5-1.5:1-3:16-40.The composite material provided by the present application forms a micro-electrolysis environment by using carbon nitride modified nano zero-valent iron and cobalt chloride modified biochar, can effectively improve the selectivity and removal rate of target pollutants, and can continuously play the roles of adsorption, Fenton-like catalytic oxidation, and micro-electrolysis in the process of treating contaminated groundwater after being embedded by the binder, so that the purpose of efficiently removing pollutants in groundwater is achieved.

This invention relates to a composite microbial agent for the remediation of hexavalent chromium pollution and its application, belonging to the field of environmental engineering technology. The composite microbial agent for hexavalent chromium pollution remediation includes anaerobic bacteria, aerobic bacteria, heavy metal bacteria, and a carbon source. This composite microbial agent can maintain high activity in the actual complex environment of groundwater with low temperature and low nutrients, rapidly reducing hexavalent chromium to low-toxicity, low-migration trivalent chromium, achieving efficient removal of hexavalent chromium. The in-situ remediation method for hexavalent chromium-contaminated groundwater of this invention can be widely applied in environmental engineering fields such as industrial site pollution remediation, mine wastewater treatment, and agricultural non-point source pollution remediation, and is particularly suitable for in-situ injection-enhanced natural attenuation groundwater remediation processes.

The application discloses an in-situ remediation system for organic contaminated groundwater and a remediation method thereof, and relates to the technical field of groundwater pollution remediation. The system comprises a circulating well main well unit, which comprises a monitoring well with a plurality of holes in the wall, and a water pumping pipe and a water injection pipe arranged in the monitoring well. A sealing unit is arranged in the monitoring well and can seal or unseal the inside of the monitoring well. The water injection pipe is located above the sealing unit, and the water pumping pipe penetrates through the sealing unit. An electro-Fenton reaction unit is arranged above the sealing unit and can generate hydrogen peroxide. A power driving unit can drive the sealing unit to move up and down through the water pumping pipe. The remediation method based on the system can complete the sealing and unsealing of the well, and further realize the purpose of freely adjusting the position of the upper and lower screen sections of the well and the proportion of the screen section and the actual section. The electro-Fenton reaction unit realizes the in-situ sufficient generation of oxidizing agents through electrochemical reaction, and realizes the efficient oxidation and removal of organic pollutants in the groundwater through the coupling with the circulating well technology.

The invention discloses a hexavalent chromium polluted underground water green remediation system and application. The hexavalent chromium polluted underground water green remediation system comprises a remediation well body and a non-contact sustainable electron injection system arranged in the remediation well body. The repair well main body comprises a shaft and a through hole formed in the wall of the shaft; the non-contact sustainable electron injection system comprises a medicament chamber and a graphite cathode plate; the medicament chamber is a closed space enclosed by a proton exchange membrane and a sealing plug, and a graphite anode plate and a sodium dithionite solution are accommodated in the medicament chamber; the graphite cathode plate is electrically connected with the graphite anode plate; according to the non-contact sustainable electron injection hexavalent chromium polluted underground water green remediation method, a reducing agent does not need to be added into a water-containing layer, the secondary pollution risk caused by the reducing agent and a product thereof is avoided, and green and efficient hexavalent chromium underground water remediation is achieved.

This invention relates to the fields of environmental protection and groundwater remediation technology, and discloses a composite slow-release material for remediating organically contaminated groundwater, its preparation method, and its application. The method includes: pretreatment of sludge; mixing sludge powder with RuCl3 solution, calcining with carbon dioxide to obtain modified biochar powder; calcining an organic nitrogen source to obtain carbon nitride powder; mixing cobalt salt, manganese salt, copper salt, ammonium fluoride, modified biochar powder, urea, and water, and reacting with sodium percarbonate to obtain a catalyst biochar material; mixing carbon nitride powder, catalyst biochar material, iron salt, and an oxygen-removing solvent, and reacting with a reducing agent to obtain modified nano-zero-valent iron; mixing modified nano-zero-valent iron, sodium percarbonate, and sodium persulfate, and adding to a binder to obtain the composite slow-release material. The composite slow-release material prepared by this method can continuously exert adsorption, Fenton-like catalytic oxidation, and micro-electrolysis effects to effectively remove pollutants from groundwater.

This invention belongs to the field of groundwater remediation technology and discloses a method for treating chlorinated hydrocarbon-contaminated groundwater using biochar in synergy with zero-valent iron (ZVI). The method includes the following steps: (1) mixing biomass with iron-containing materials and then pyrolyzing the mixture under oxygen-limited conditions at a temperature of 700-900°C to obtain biochar-ZVI material; (2) injecting the biochar-ZVI material into the chlorinated hydrocarbon-contaminated groundwater to be treated for reaction, with the reaction time lasting at least 7 days, thereby achieving the treatment of chlorinated hydrocarbons in the chlorinated hydrocarbon-contaminated groundwater; wherein the pH value of the chlorinated hydrocarbon-contaminated groundwater does not exceed 11. The biochar-ZVI material prepared using the specific process of pyrolysis at 700-900°C can effectively treat chlorinated hydrocarbons in chlorinated hydrocarbon-contaminated groundwater. The synergistic chemical effect between biochar and ZVI significantly increases the electron capacity of zero-valent iron in the reaction and enhances the reaction activity.

The application discloses a method for repairing chlorobenzene contaminated groundwater in-situ by using soluble Mn(III), and belongs to the technical field of environmental pollution repair, and comprises the following steps: construction of an in-situ injection system, preparation of a repair reagent, rapid removal of chlorobenzene, and continuous mineralization of degradation products. The soluble Mn(III) generated by a permanganate / bisulfite (PM / BS) process is selected as the repair reagent, the chlorobenzene pollutants are rapidly and efficiently degraded through an electrophilic substitution mechanism, the PM process is coupled, the continuous mineralization of intermediate products is realized, and the complete elimination of the chlorobenzene pollutants in the groundwater is achieved. The technical method is simple and practical, the process is green, the treatment effect is complete and not prone to rebound, the cost is relatively low, the method is beneficial to large-scale promotion, and the method has remarkable economic, environmental and social effects.

The application relates to the technical field of underground contaminated water remediation, in particular to a hexavalent chromium contaminated underground water remediation device and a remediation method, which comprises a medicine injection pipeline, a sliding rod is arranged on the side of the medicine injection pipeline in a vertical direction, a medicine outlet hole is arranged on the side of the sliding rod, the sliding rod is of a hollow structure and the inside of the sliding rod and the inside of the medicine injection pipeline are communicated, a control assembly and a medicine pressing assembly are arranged on the medicine injection pipeline, the control assembly is connected with the sliding rod and used for adjusting the position of the sliding rod, and the medicine pressing assembly is used for extruding the solution in the medicine injection pipeline through the medicine outlet hole. The application has the effect that the remediation solution can be injected into different depths.

The invention is applicable to the technical field of polluted groundwater remediation, and particularly relates to a preparation method and application of xanthan gum reinforced stable nonionic colloidal foam, the method comprises the following steps: mixing a nonionic surfactant with water at room temperature, and carrying out ultrasonic treatment to obtain a nonionic surfactant dispersion liquid; adding xanthan gum, and uniformly dispersing the xanthan gum by stirring to obtain a binary compound solution; and placing the mixture in an air atmosphere, and stirring to obtain the nonionic colloidal foam system. According to the invention, the introduction of xanthan gum effectively improves the solution viscosity and the foam film strength, delays the liquid discharge process, and significantly prolongs the half-life period of foam; meanwhile, due to the fact that the nonionic surfactant is adopted as the foaming agent, the system can keep good stability and interference resistance in the underground complex environment, and the foam system is uniform in structure and adjustable in performance, has high environmental adaptability and application potential and is suitable for in-situ remediation of organic pollutants of the underground aquifer.

The invention discloses a composite biological stimulation agent for stimulating activity of a petroleum hydrocarbon degrading enzyme, which comprises the following components in parts by weight: 5 to 8 parts of KNO3, 5 to 10 parts of FeSO4, 1 to 8 parts of MnSO4, 1000 parts of rhamnolipid and 20 parts of succinic acid. The method has the beneficial effects that the spanning of an in-situ bioremediation technology of the petroleum-polluted underground water from experience to quantification and mechanization is promoted, and the method has important theoretical value and engineering application prospect. The restoration efficiency is improved in magnitude, and the petroleum hydrocarbon degradation rate within 7 days is improved to 75% from 30% under the natural attenuation condition.

The utility model discloses modularized sampling equipment for polluted underground water, which comprises a sampling drill hole communicated with underground water, a sampling main communicating pipe is fixed in the sampling drill hole, and a plurality of sampling split communicating pipes are fixed in the sampling main communicating pipe; a vacuum type sampling mechanism is connected in the sampling split communicating pipe in a sliding manner; the vacuum type sampling mechanism comprises a sampling taking and placing sleeve which is in sliding fit in the sampling split communicating pipe, and a plurality of sampling bottles are placed in the sampling taking and placing sleeve; the bottleneck of each sampling bottle is communicated with underground water through a pipeline; the equipment has a timing sampling function, the plurality of sampling bottles are convenient to collect underground water samples in batches for multiple times, and sampling is performed according to a preset time interval by performing timing setting on each sampling input timing valve, so that the requirement of monitoring the dynamic change of underground water is met.

The invention discloses chlorohydrocarbon polluted groundwater remediation equipment and a remediation method. The chlorohydrocarbon polluted groundwater remediation equipment comprises an extraction well which is arranged underground and communicated with groundwater, and a groundwater soaking mechanism, a nano bubble oxidation mechanism, a three-dimensional electrolysis mechanism and a photocatalytic microorganism composite degradation mechanism which are sequentially connected with the extraction well, the underground water soaking mechanism comprises an underground water input collecting pipe and an underground water output collecting pipe which are arranged in parallel, a plurality of underground water conveying short pipes communicated with the underground water input collecting pipe are fixed to the outer side of the underground water input collecting pipe, and a plurality of solar heat pipes are arranged between the underground water conveying short pipes and the underground water output collecting pipe in a communicated mode. The upper end of the extraction well is communicated with the underground water input collecting pipe through an extraction conveying pipe, and an extraction conveying pump is arranged on the extraction conveying pipe. The repairing equipment adopts multi-technology collaboration, the degradation efficiency is high and thorough, a coherent process of oxidation-electrolysis-composite degradation is formed, the advantages of all the technologies are complementary, and the repairing effect is greatly improved.

The invention relates to the field of biological stimulation agents, and discloses a biological stimulation agent for long-acting remediation of petroleum-polluted underground water and a preparation method, and the biological stimulation agent comprises the following components: 5-10 parts of KNO3, 5-10 parts of FeCl2, 1-5 parts of disodium glycerophosphate, 5-10 parts of corn peptide, 1-5 parts of humic acid and 20-50 parts of sorghum flour fermentation broth. The method comprises the following steps: 1, preparing sorghum flour fermentation liquor; and 2, preparing the multifunctional composite slow-release agent to obtain the multifunctional composite slow-release agent. The method has the beneficial effect of remarkably improving the repairing efficiency. The problem of ecological adaptability caused by rapid migration or instantaneous excessive addition is effectively avoided, and reliable material and theoretical support is provided for engineering application of an underground water bioremediation technology.

The invention relates to the field of polluted water treatment, and particularly discloses a method for removing pollutants in underground water by activating sodium persulfate with activated carbon in cooperation with multivalent iron. The method comprises the following steps: taking underground water containing pollutants, and adjusting the pH value to an acidic condition to obtain acidified polluted water; adding activated carbon, multivalent iron and sodium persulfate into the acidified polluted water, and carrying out in-situ oxidation reaction; the multivalent iron comprises at least two of zero-valent iron powder, ferrous sulfide and ferrous disulfide. According to the method, sodium persulfate is activated by multivalent iron, high-concentration ROS is generated on the interface of the sodium persulfate, meanwhile, activation of the sodium persulfate can be promoted by adding activated carbon, a high-pollutant-concentration microenvironment is formed by utilizing the adsorption advantage of high specific surface area of the activated carbon, and pollutant degradation is promoted in cooperation with the multivalent iron. By adopting the method, the polluted underground water containing the chlorinated hydrocarbon and the polycyclic aromatic hydrocarbon can be efficiently and permanently treated.

The invention relates to the technical field of underground water purification, and discloses an underground water purification column which comprises a column body, three layers of fillers arranged in the column body, and a sealing device and a water distribution device which are arranged at two ends of the column body, the three layers of fillers are a pretreatment layer, a deep purification layer and an interception-recovery layer in sequence from a water inlet end to a water outlet end along the flowing direction of underground water; the pretreatment layer is made of modified quartz sand with the particle size of 0.8-1.2 mm, and the deep purification layer is made of a corncob biochar-chitosan magnetic composite adsorbent; the interception-recovery layer is a mixed layer of magnetic Fe3O4 and corncob charcoal; and the sealing device is an elastic silicon rubber sealing ring, so that the pressure resistance value of the column body is greater than or equal to 1.2 MPa. The removal rates of the purification column on Pb < 2 + >, Cu < 2 + > and Cd < 2 + > are greater than or equal to 98%, 95% and 92% respectively, the recovery rate of the CCC adsorbent after five times of regeneration is greater than or equal to 92%, and the purification column is suitable for efficient purification of heavy metal polluted underground water around mines and the like.

The utility model discloses an ecological filter system, which relates to the technical field of polluted water treatment and comprises a column type treatment filter and an aeration device. An inlet for injecting polluted underground water is formed above the column type treatment filter tank, and a water outlet is formed below the column type treatment filter tank; a functional reaction filler layer is arranged in the column type treatment filter tank; the functional reaction filler layer comprises an iron-carbon filler, the iron-carbon filler is an iron-carbon ball formed by mixing scrap iron and biochar, the iron-carbon filler is soaked in a bacterial liquid, and the bacterial liquid is obtained by expanding culture of organic matter degradation denitrifying bacteria; the aeration device is provided with an aeration pipe which is positioned in the functional reaction filler layer. According to the invention, various pollutants can be efficiently and synchronously treated, and a relatively high pollutant removal function is achieved.

The invention discloses an automatic control in-production enterprise internal polluted underground water extraction treatment system which comprises a plurality of circulating extraction wells surrounding the periphery of an in-production enterprise internal pollution source and a ground water vapor treatment assembly. The treatment process comprises the following steps: S1, arranging a circulating extraction well; s2, preliminary extraction; s3, elution and extraction; and S4, enhanced extraction. According to the method, a plurality of circulating extraction wells with different structures are arranged in the in-production enterprise, so that the underground water in the in-production enterprise is continuously repaired and treated. The circulating extraction wells of different circulating well sections are arranged and matched with one another, and all-dimensional deep continuous remediation of polluted underground water of different depths is achieved.

The utility model discloses a movable polluted groundwater well washing device, which relates to the technical field of environment monitoring and comprises a box body, a box cover is hinged on the upper surface of the box body through a hinge, a storage battery, a variable-frequency governor and a flow meter are arranged on the inner wall of the box body, and the variable-frequency governor and the flow meter are electrically connected with the storage battery through leads. A well washing device body and two supporting frames are arranged outside the box body, and a winding roller is installed between the two supporting frames. According to the underground water quality pollution detection device, underground water needing to be detected can be pumped through the well washing device, new water is returned, the obtained water quality has representativeness, the accuracy of the underground water quality pollution detection result is guaranteed, the movable power source is used for supplying power to the well washing device, meanwhile, the pumping speed of the well washing device can be controlled, and the water quality pollution detection accuracy is improved. The amount of the pumped underground water can be monitored, and the polluted underground water well washing device is integrally designed, so that the convenience and practicability during subsequent use and movement can be improved.

The invention discloses an intelligent low-cost groundwater pollution treatment method and system, and belongs to the technical field of groundwater pollution control. The method comprises the following steps: obtaining hydrogeological parameters of a polluted area; calculating the total amount of pollutants in the polluted area by using field sampling analysis and numerical simulation results; calculating the environmental capacity of the polluted area based on the hydrogeological parameters and the total amount of the pollutants; establishing a groundwater numerical model based on the hydrogeological parameters, the total amount of pollutants and the environmental capacity, simulating a pollutant migration rule under different groundwater artificial replenishment amounts, and determining the optimal artificial replenishment amount meeting the standard of the water quality of the downstream river channel; monitoring the water quality of the underground water supply part and the underground water discharge part of the polluted area in real time, and regulating and controlling the optimal manual supply amount when the water quality exceeds the standard until the water quality reaches the standard. Natural hydrological cycle and environmental capacity are fully utilized, low-cost and intelligent remediation of polluted underground water is achieved, water quality safety of downstream rivers is guaranteed, and remarkable economic and environmental benefits are achieved.

The invention relates to the field of preparation of a multi-shell structure slow-release medicament, and discloses a preparation method of a multi-shell structure slow-release medicament for repairing petroleum-polluted underground water, which comprises the following steps: 1, preparing a nutrition matrix: the nutrition matrix comprises the following components in parts by weight: 100.0 to 150.0 parts of NaH2PO4, 500.0 to 600.0 parts of K2HPO4, 50.0 to 100.0 parts of NH4H2PO4, 50.0 to 100.0 parts of NaNO3, 10.0 to 20.0 parts of CaCl2, 50.0 to 100.0 parts of MgSO4. 7H2O, 5.0 to 15.0 parts of FeSO4. 7H2O and 0.1 to 0.5 part of VB12; and 2, preparing the slow-release medicament: preparing the slow-release medicament with a single-layer shell structure, preparing the slow-release medicament with a double-layer shell structure and preparing the slow-release medicament with a three-layer shell structure. The slow-release agent has the beneficial effects that petroleum hydrocarbon in underground water can be efficiently degraded, and the petroleum hydrocarbon degradation effect is improved by 40% or above when the slow-release agent stimulates indigenous microorganisms to act for 10 days under experimental conditions.