8 results about "Contaminated groundwater" patented technology

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.

This invention relates to the field of aquifer seepage simulation and pollution control testing technology in mining areas, and particularly to a simulation system and method for the migration and remediation of contaminated groundwater in coal-uranium superposition areas. The technical solution includes a laying mechanism, a leaching and extraction mechanism, a disturbance mechanism, an integrated measurement and control mechanism, a groundwater migration mechanism, and a pollution purification mechanism. This invention achieves accurate reconstruction of the complex aquifer structure of coal-uranium superposition and synchronous application of mining-leaching coupled conditions. It utilizes resistivity tomography and a multi-parameter sensor network to achieve online monitoring, image visualization, and closed-loop control of the seepage-contamination process. Through a coiled migration pipeline, a post-mining migration trench, and a seepage reduction barrier-reduction solidification unit, it simulates the entire process from pollution formation, far-field migration, post-mining redistribution to end-of-pipe treatment. This system has high integration, strong controllability, and good repeatability, and can systematically reveal the migration mechanism and remediation response law of contaminated groundwater.

The application provides a heavy metal contaminated groundwater remediation system and a remediation method, and relates to the technical field of groundwater pollution remediation. The system comprises a horizontal pipe, the lower surface of the horizontal pipe is fixedly connected with a plurality of conical pressure cylinders, the inner wall of each conical pressure cylinder is provided with an annular cavity, the opposite side of the inner wall of each annular cavity is provided with a plurality of through holes, and the left and right sides of the upper side of the inner wall of each annular cavity are provided with adjusting devices; the adjusting device comprises a waterproof motor fixedly connected to one side of the inner wall of the annular cavity. The system has high performance, high remediation efficiency, ensures the remediation effect of groundwater, improves the use effect and use quality of the remediation equipment, avoids increasing the cost of the secondary remediation process of the equipment, avoids the problem that the soil may affect the pressing device during the groundwater extraction process in the traditional remediation equipment, improves the groundwater extraction effect of the equipment, and improves the remediation efficiency of the overall equipment.

This invention discloses a method for preparing a dual-emulsion sustained-release agent for remediating petroleum-contaminated groundwater, belonging to the field of petroleum pollution control. The method includes preparing a nutrient matrix, preparing a dual-emulsion nutrient sustained-release agent, and preparing an outer shell structure. The specific steps for preparing the dual-emulsion nutrient sustained-release agent are as follows: Step 1, obtaining an inner aqueous phase W1; Step 2, obtaining an experimental oil phase O; Step 3, stirring to form a W1 / O type emulsion; Step 4, obtaining an outer aqueous phase W2; Step 5, obtaining the dual-emulsion nutrient sustained-release agent. The specific steps for preparing the outer shell structure are as follows: Step 1, heating to form a gelling agent; Step 2, the ratio of the gelling agent to W1 / O / W2 is 5:1; Step 3, water bath heating; Step 4, solution separation; Step 5, obtaining a boric acid solution; Step 6, forming spherical structures in the solution; Step 7, obtaining the dual-emulsion sustained-release agent. Beneficial effects: It can efficiently degrade petroleum hydrocarbons in groundwater, improving the petroleum hydrocarbon degradation effect by more than 40%.

The present application belongs to the technical field of groundwater pollution remediation, and particularly relates to an in-situ biological stimulation remediation method for treating Cr(VI) and organic compound contaminated groundwater. The method is to use sugarcane syrup as a remediation reagent to stimulate the growth and domestication of indigenous microorganisms, so as to effectively remove the compound pollution in the groundwater. The sugarcane syrup, a by-product of sugar industry, has the best effect on removing the compound pollution of Cr(VI) and nitrobenzene (the removal rate can reach 99%). The present application also determines the removal conditions of the compound pollution of Cr(VI) and nitrobenzene: pH is greater than or equal to 7, temperature is greater than or equal to 15 DEG C, Cr(VI) is less than or equal to 35 mg / L, and the concentration of nitrobenzene is less than 75 mg / L. Under the conditions, the removal rate of Cr(VI) can reach 99%, and the removal rate of nitrobenzene can reach 95%. The present application provides an innovative solution for simultaneously remedying the groundwater contaminated by Cr(VI) and organic compounds.

This invention discloses an in-situ permeable reactive barrier remediation device and method for heavy metal-contaminated groundwater. The device comprises a permeation zone, a reaction zone, and a buffer zone arranged sequentially. The permeation zone is equipped with permeation packing material, and the buffer zone is equipped with buffer packing material. The reaction zone is equipped with reaction packing material, which includes at least zeolite loaded with nano-zero valent iron and attapulgite loaded with acidic substances. The surface of the attapulgite is coated with a gelatin layer. The particle size of the buffer packing material is smaller than that of the reaction packing material, and the particle size of the reaction packing material is smaller than that of the permeation packing material. This invention, by loading acidic substances into attapulgite and using it in combination with zeolite loaded with nano-zero valent iron, creates an acidic or weakly acidic environment for the zeolite loaded with nano-zero valent iron, effectively enhancing the removal of antimony from groundwater by the zeolite loaded with nano-zero valent iron, achieving excellent in-situ groundwater remediation results.

The present application relates to a kind of micro-nano bubble liquid targeting injection system suitable for contaminated groundwater in-situ remediation, injection subsystem is prepared with micro-nano bubble liquid preparation mechanism Micro-nano bubble liquid, micro-nano bubble liquid is injected into injection well, with targeting injection device Micro-nano bubble liquid is targeted to injection into injection well, injection site adjusting mechanism Micro-nano bubble liquid is targeted to injection into injection site;Extraction subsystem includes extraction well.The present application is directly acted on specified injection site with micro-nano bubble liquid, effectively constructs underground oxidation environment, promotes microbial action, the energy generated by the breakage of micro-nano bubble promotes the generation of hydroxyl radical in groundwater, oxidizes and degrades pollutants, and the toxicity of byproduct is low, clean and green;Promote the effective contact of micro-nano bubble liquid and pollutants and its mass transfer in formation, improve the action efficiency of micro-nano bubble liquid;Overcome the shortcoming that different depth soil layer character is not the same, save engineering cost;Real-time monitoring is injection control feedback information.