42 results about "Pollution Remediation" patented technology

The application discloses an L-cysteine-based soil lead pollution leaching agent and a preparation method thereof, and belongs to the technical field of soil heavy metal pollution remediation. The L-cysteine-based soil lead pollution leaching agent comprises the following raw materials: an L-cysteine solution, a pH buffer and a polyvinylpyrrolidone solution; the concentration of the L-cysteine solution is 0.3-0.5 mmol / L, the concentration of the pH buffer is 1 mmol / L, and the mass fraction of the polyvinylpyrrolidone solution is 0.003%-0.005%; the volume ratio of the L-cysteine solution, the pH buffer and the polyvinylpyrrolidone solution is 1:1:0.15-0.4. The leaching agent has a remarkable leaching effect on soil lead, and the removal rate of the leaching agent on the contaminated soil with a Pb content of more than 500 mg / kg can reach more than 85%, so that the leaching agent can effectively prevent lead from migrating through the soil into a food chain or a water environment, and is much stronger than a traditional carboxyl-based leaching agent.

The application belongs to the field of microorganisms and the field of environmental protection, and provides at least one urea-producing Paenarthrobacter ureafaciens for degrading atrazine, wherein the urea-producing Paenarthrobacter ureafaciens is preserved in the China General Microbiological Culture Collection Center of the Institute of Microbiology, Chinese Academy of Sciences, located at No. 1, Xiliujia, Beijing Chaoyang District, and has the preservation numbers of CGMCC No. 37944 or CGMCC No. 37943, respectively. The application obtains the urea-producing Paenarthrobacter ureafaciens with high efficiency, wide spectrum and strong environmental adaptability through screening, and finally realizes rapid and complete repair of atrazine contaminated soil by matching an optimized microbial agent formula and a preparation process, so as to reduce repair cost, promote the large-scale application of the microbial repair technology in farmland and industrial pollution sites, and solve many technical bottlenecks in the field of atrazine pollution repair.

This invention relates to the fields of environmental pollution remediation and biocatalysis, and provides a method for preparing a self-supplied H2O2 cathode material via an electroenzyme cascade and its application. The cathode material is an ionic liquid-modified CPO-IL. EMB The bio-hybrid material formed by immobilizing molybdenum disulfide-modified MoS2@Co-CNNT composite material, namely CPO-IL EMB / MoS2@Co-CNNT. An electroenzyme cascade degradation system was constructed using this biohybrid material as the cathode. By controlling the electrode potential, controllable H2O2 generation was achieved while protecting the Fe(III) in the iron porphyrin ring of CPO from reduction, thus maintaining the intrinsic oxidative activity of the enzyme. The in-situ generated H2O2 activates CPO-IL. EMB It efficiently catalyzes the oxidative degradation of mesotrione. This invention requires no external CPO-IL. EMB It is green and environmentally friendly, with high degradation efficiency, and has promising applications in agricultural wastewater treatment and environmental remediation.

The application discloses a kind of bipolar high-voltage electrode soil remediation device and method based on infrared imaging regulation and control, it is related to soil pollution remediation technical field, comprising: two-way high-voltage power supply, the output of two-way high-voltage power supply is connected with bipolar high-voltage electrode assembly by high-voltage wire harness, and is used to output the positive and negative direct-current high-voltage pulse with amplitude ±10kV~±50kV, frequency is 5Hz~20Hz;Infrared imaging monitoring module, the infrared imaging monitoring module is installed on the holder support, and the infrared imaging monitoring module can be driven by holder support to carry out full coverage real-time imaging to the soil of embedded electrode area;The application captures the soil discharge thermal characteristics in real time by infrared imaging, determines the over-discharge and electric field blind area condition in combination with the repair method of the application, and adjusts the repair device parameters in combination with the determination condition, breaks through the limitation of traditional technology static setting, offline detection, forms closed-loop control system, effectively avoids over-discharge and electric field blind area problem, and improves repair uniformity and effect.

This utility model belongs to the field of soil pollution leaching, specifically a leaching device for soil pollution remediation. It includes a leaching apparatus with a double crushing mechanism at the top. The double crushing mechanism includes a holding shell, the bottom of which is fixedly connected to the top of the leaching apparatus, and a support plate fixedly connected to one side of the holding shell. This utility model uses a motor to drive a first synchronous wheel and a crushing roller to rotate. The crushing roller rotates and pounds the soil, crushing larger stones to prevent them from clogging the feed inlet and reducing leaching efficiency. The rotation of the first synchronous wheel drives a synchronous belt, which in turn drives a second synchronous wheel and a gear to rotate. The gear's rotation drives another gear to rotate relative to it, which in turn drives two crushing rollers to rotate relative to each other, further crushing the stones in the soil and improving the subsequent leaching efficiency.

The application relates to the cross field of photocatalytic composite materials and soil environment remediation technology, and specifically discloses a three-dimensional graphene aerogel loaded cadmium sulfide quantum dot composite material, a preparation method and application of the composite material in soil cadmium pollution remediation, the composite material is composed of a three-dimensional interconnected porous sulfur-doped graphene aerogel skeleton and in-situ anchored cadmium sulfide quantum dots, the cadmium sulfide quantum dots have a particle size of 2-10 nm, a loading amount of 10 wt%-25 wt%, a surface sulfur vacancy density of 5%-8%, the skeleton has a sulfur atom content of 2 at%-5 at%, and the two are connected through a carbon-sulfur-cadmium covalent bridge; the material has a hierarchical porous structure with longitudinal through macropores of 20-80 mu m and intrawall mesopores of 2-20 nm, the material is prepared by adopting a three-stage programmed hydrothermal method, and a sulfur source is released in stages by 30%-50% excess thioacetamide to drive the formation of an epoxy group nucleophilic ring-opening anchor point, in-situ nucleation of quantum dots and generation of surface sulfur vacancies.

This invention provides a sampling and detection device for watershed soil pollution remediation, belonging to the field of soil testing technology. It includes a support plate, a sampling cylinder, a first lifting assembly, a drilling assembly, a lateral movement assembly, a sealing assembly, and a second lifting assembly. The sampling cylinder is disposed inside the support plate. The first lifting assembly is mounted on the inner wall of the support plate and is used to move the sampling cylinder up and down. When the sampling cylinder moves downward, it inserts into the ground. The drilling assembly and the sealing assembly are disposed to the side of the sampling cylinder. The second lifting assembly and the lateral movement assembly are mounted on the inner wall of the support plate, and the second lifting assembly is used to move the drilling assembly and the sealing assembly up and down. Compared with the prior art, this invention prevents soil samples from falling out of the sampling cylinder when sampling watershed soil, ensuring smooth soil sampling.

This invention belongs to the field of soil and rock mass pollution remediation technology, and discloses a remediation system and method for hexavalent chromium contaminated soil / fractured rock mass, including a heating unit, a temperature monitoring unit, and a ground barrier unit. The heating unit includes an energy supply system and a heating well, with the energy supply system and the heating well sealed together, using heat conduction heating to heat the soil and fractured rock mass in situ. The temperature monitoring unit includes temperature sensors and monitoring wells, with the temperature sensors spaced along the depth direction of the monitoring wells. The temperature monitoring unit enables real-time temperature monitoring and feeds the data back to the energy supply system. The ground barrier unit is a concrete layer that insulates and seals the surface of the remediation area, preventing heat loss and air ingress into the soil. This invention solves the technical problems of difficult mass transfer of reducing agents, unstable remediation effects, and high difficulty in remediating fractured bedrock in traditional in-situ remediation technologies for Cr(VI) pollution.

This invention relates to the fields of environmental engineering and pollution remediation technology, and in particular to a bioelectrochemical system for the remediation and fixation of heavy metal pollution in groundwater and its application. The bioelectrochemical system employs an integrated columnar layered structure simulating vertical seepage of groundwater, comprising, from bottom to top: a groundwater inlet zone, a first transition support layer, an anodic reaction zone, an intermediate isolation layer, and a cathodic reaction zone. Electroactive microorganisms in the anodic zone oxidize organic matter, releasing electrons. These electrons are transferred to the cathode via an external circuit, driving the reduction of heavy metal ions (such as Cr(VI)) to a lower valence state, while pyrite releases Fe. 2+ Biochar promotes precipitation by enhancing fixation through adsorption and electron shuttle. This bioelectrochemical system enables continuous in-situ remediation of groundwater, achieving a Cr(VI) removal rate of up to 92.7%, while simultaneously removing organic matter and nitrogen and phosphorus pollutants. It exhibits stable long-term operation with a low risk of heavy metal re-release, requires no large amounts of chemical reagents or external power supply, and has low operating costs.

The present application belongs to the technical field of pollution remediation, and particularly relates to Bacillus atrophaeus SCAU-H1 capable of remediation of heavy metal pollution and application thereof. The present application obtains a strain of Bacillus atrophaeus SCAU-H1, which is preserved in Guangdong Microbial Culture Collection Center on December 22, 2023, with a preservation number of GDMCC NO: 64181. The strain SCAU-H1 can effectively remove As(III), As(V), Cd, Pb and Sb heavy metals in water, and particularly has excellent removal effect on As(V). Moreover, the strain can significantly reduce the effective content of heavy metals Cd and Pb in soil, and has a significant immobilization effect. Therefore, the strain SCAU-H1 can be used for remediation and treatment of heavy metal contaminated water and soil.

This invention discloses an intelligent selection method for soil heavy metal pollution remediation agents based on data fusion. The method constructs a basic pollution feature set and maps it to a unified dimension to form a standardized pollution feature vector. Simultaneously, it constructs a remediation agent characteristic data set for candidate remediation agents and forms a remediation agent characteristic vector set consistent with the standardized pollution feature vector. A pollution remediation response mapping structure is established to characterize the relationship between pollution state and remediation agent action, and heavy metal speciation constraints are introduced into this mapping structure to generate a set of remediation response parameters. By extrapolating the remediation results of different remediation agents under different application conditions, a set of predicted remediation effects is obtained. Based on this, remediation agents and their application conditions that meet the preset remediation targets are selected, and the target remediation agent selection results are output. This invention enables the quantification and targeting of the remediation agent selection process, improving the effectiveness and reliability of soil heavy metal pollution remediation.

This invention discloses a modified CaFe-LDH composite material and its application in Cd removal. 2+ With Cr 6+ The application of this material involves the fields of environmental functional materials and pollution remediation technology. The preparation method of the modified CaFe-LDH composite material includes the following steps: mixing calcium nitrate or its hydrate, ferric nitrate or its hydrate, and water; stirring and reacting the mixture; allowing it to stand for aging; and then drying it to obtain CaFe-NO3. ‑ -LDH; utilizing Mo3S 13 2‑ The solution for CaFe-NO3 ‑ Ion exchange with -LDH yields CaFe-Mo3S 13 2‑ -LDH refers to the modified CaFe-LDH composite material. The modified CaFe-LDH composite material of this invention possesses adsorption, reduction, and passivation functions simultaneously, enabling multi-stage pollution control in water purification and in-situ soil remediation.

This application discloses a contaminated soil remediation agent and its remediation method, belonging to the field of contaminated soil remediation. The contaminated soil remediation agent comprises a first component and a second component, with a weight ratio of 1.8–2.5:1. The first component is phosphonate-functionalized magnetic mesoporous carbon; the second component contains a protein-polysaccharide complex. This remediation agent, with its phosphonate-functionalized magnetic mesoporous carbon, solves the problem of solid-solid separation. Furthermore, it works synergistically with the protein-polysaccharide complex, achieving a good soil remediation effect.

This utility model discloses a direct-insertion soil pollution remediation rod, comprising a rod body for insertion into deep soil. The rod body is equipped with an adjustment component to reduce the difficulty of insertion. A remediation component is disposed inside the rod body for volatilizing agents to remediate soil pollution. The beneficial effects of this utility model are that by inserting the rod body into the contaminated soil, the remediation of the contaminated soil is achieved using agents pre-placed in the reaction chamber and storage chamber. This insertion method expands the remediation depth of the soil remediation device, improving the situation where existing soil remediation devices struggle to effectively treat deep soil layers. Furthermore, by utilizing the overlap and separation of the first and second discharge ports, intermittent dispensing of the agent in the storage chamber is achieved, effectively controlling the generation efficiency of the remediation agent and avoiding the problem of over-remediation due to excessive generation, thereby improving the quality of contaminated soil remediation.

This invention discloses a soil pollution evolution prediction system and method based on machine learning, belonging to the field of soil pollution remediation technology. The invention delineates soil region boundaries and grids them, generating soil units with unique coordinates. It extracts static basic data feature sets for each coordinate, inputs them into a trained machine learning model, and outputs the static pollution impact level. Then, it collects the soil volumetric water content at each coordinate and calculates the dynamic pollution impact level based on the static value. Subsequently, it determines the spatial correlation between coordinates, obtains paired combinations with potential pollution transmission, calculates the pollution impact coefficient of the source on the target, constructs a soil pollution correlation graph based on the coefficient, sets the coordinates as nodes, and configures their attributes. Based on this correlation graph, according to the preset graph calculation logic, it obtains the pollution state change data of each soil coordinate under different time dimensions. This invention significantly improves the accuracy, interpretability, and engineering practicality of soil pollution evolution prediction.

This invention relates to the field of soil pollution remediation technology, specifically to a soil pollution remediation device and method. The device includes a mobile frame with a remediation box at its lower end. The remediation box comprises, from top to bottom, an upper cover, a box body, and a base. The box body has an integrally formed internal toothed ring inside. The lower end of the base has a spiral groove with a rotating slot inside. The upper end of the base has a rotating ring groove with a rotating ring embedded in it. The lower end of the base has an integrally formed shielding part. The remediation box is equipped with a remediation mechanism. This invention utilizes the base, spiral groove, and shielding part, combined with the remediation mechanism and spraying components, to achieve static, closed-loop soil tillage remediation. This avoids the shortcomings of mobile tillage remediation, prevents waste and hazards caused by the atomization and exposure of the remediation agent, ensures the remediation agent fully penetrates the soil, and improves the efficiency of soil pollution remediation, thus possessing practicality.

This application provides a method for the recovery of valuable substances and synergistic removal of pollutants from complex contaminated soil, belonging to the field of soil pollution remediation and resource utilization. The method involves pre-treating the complex contaminated soil to remove slag particles larger than 2 cm; then, after adjusting the pre-treated soil slurry, flotation is used to collect valuable substances. The flotation slurry is further separated to remove fine soil particles ≤20 μm in diameter; a leaching solution is added to the slurry after the fine particles are removed for cavitation stripping and sieving to obtain soil particles of different sizes and a leaching underflow; the leaching underflow is then pressure filtered to obtain filter residue and clarified liquid; a stabilizing agent is added to the filter residue for solidification and stabilization treatment; and the leached soil is discharged after passing quality tests. This application efficiently recovers valuable substances such as gold and silver from soil through flotation, achieving resource utilization. Subsequent removal, leaching, and solidification steps achieve the harmless removal of heavy metals, balancing environmental and economic benefits.

The application discloses a time sequence control type composite pollution repair material for facility agriculture soil and a preparation method and application thereof, and belongs to the technical field of soil repair. The repair material is a three-layer core-shell structure particle, which comprises, from inside to outside, an inner core layer composed of biodegradable polyester wrapping pesticide degrading enzyme and pesticide adsorbent, a middle layer composed of water / ion responsive hydrogel wrapping heavy metal fixing agent and oxidative degradation catalyst, and an outer shell layer composed of brittle degradable polymer wrapping micro / nano plastic surface capping agent. The repair material realizes time sequence and synergistic repair of micro / nano plastic, available Cd and malathion by triggering the release of the outer shell layer through plowing mechanical force, triggering the slow release of the middle layer through irrigation water response, and triggering the release of the inner core layer through rhizosphere microbial enzyme. The material has simple preparation process, convenient application and good application prospect.

This invention discloses a method for preparing a denitrifying mineralization functional strain-calcium-rich biochar composite agent and its application in fluoride pollution remediation, belonging to the field of wastewater treatment and soil improvement technology. The preparation method includes: (1) targeted screening of strains: through the gradient increase of nitrogen source and fluoride stress and the control strategy of trace elements, strains with high fluoride tolerance, strong denitrification and efficient mineralization are screened; (2) preparation of calcium-rich carrier: using waste animal bones as raw materials, calcium-rich biochar carriers with slow-release calcium, pH buffer and high specific surface area are prepared; (3) construction of composite agent: the bacterial suspension is mixed with the carrier to form a high-density active biofilm. The composite agent is used for the remediation of fluoride-containing groundwater, and the effluent meets the Class III standard of groundwater; when used for the remediation of modified phosphogypsum backfill, the fluoride concentration of leachate is less than 1.0 mg / L. This invention achieves stable remediation of fluoride pollution through the synergistic effect of bacteria and biochar, and has the advantages of being green and low-carbon, low cost and outstanding engineering potential.

This invention discloses a method and apparatus for preparing a soil pollution remediation engineering catalyst, specifically belonging to the field of soil remediation technology. The soil pollution remediation engineering catalyst is a modified zinc-iron oxide mineral piezoelectric material, mainly composed of multilayer magnetically responsive zinc-iron oxide nanoblocks supported on brominated polyhydroxy magnesium phosphate foam. The preparation method includes the preparation of multilayer magnetically responsive zinc-iron oxide nanoblocks, the preparation of brominated polyhydroxy magnesium phosphate foam, and the preparation of the modified zinc-iron oxide mineral piezoelectric material. The application apparatus of this soil pollution remediation engineering catalyst includes an electromagnetic-piezoelectric catalytic system and a piezoelectric catalytic auxiliary system. The modified zinc-iron oxide mineral piezoelectric material is forced to deform by magnetic force and the mechanical force generated by mixing, thereby activating persulfate degradation of pollutants in the soil. This invention features high treatment efficiency, low energy consumption, and environmental friendliness, providing a novel remediation method for soil remediation.

The application relates to the technical field of water and soil pollution control, and discloses an iron-nitrogen co-doped biochar for Cd-As composite pollution remediation, a preparation method and application, which comprises the following raw materials: biomass material, potassium ferrate and melamine. The iron-nitrogen co-doped biochar can realize the synergistic and efficient removal of Cd(II) and As(III), and the adsorption capacity of the biochar for As(III) in a Cd-As composite pollution system reaches 28.96 mg / g, which is 5.18 times higher than that in a single As(III) pollution system.

This invention relates to the field of environmental engineering technology, specifically to a highly efficient solubilizing surfactant for chlorinated hydrocarbons, its application, and a method for its preparation. The surfactant comprises decaethylene glycol monododecyl ether, Tween 20, and water. This surfactant is used to solubilize chlorinated hydrocarbon organic pollutants in contaminated sites, including soil, groundwater, and surface water. The mixture of decaethylene glycol monododecyl ether and Tween 20 produces mixed micelles, which increases the solubility of chlorinated hydrocarbons in water and significantly reduces the CMC value of the mixed surfactant, effectively reducing the amount of surfactant required and lowering remediation costs. This surfactant exhibits good biodegradability, high solubilizing ability, and low cost, achieving environmental pollution remediation while reducing secondary pollution.

This utility model discloses a mobile organic pollution remediation device, belonging to the field of soil remediation technology. It includes a mounting plate; two sets of moving components connected to the front and rear sides of the bottom of the mounting plate; each moving component includes a rotating shaft with two rotatable wheels at both ends, and the shaft is connected to the mounting plate via a hydraulic telescopic rod; a crushing component installed in front of the mounting plate; a turning and spreading component installed behind the crushing component, with an outer cover fixed to the bottom of the mounting plate; and a spraying component including a medicine tank fixed to the mounting plate, with several nozzles connected to the bottom of the tank, the nozzles passing through the mounting plate and the outer cover and communicating with the inside of the outer cover. This utility model achieves a continuous operation of "crushing-turning and spreading-spraying," combining the advantages of mobility, pretreatment effect, uniform mixing, and controllable spraying of chemicals, thus improving the quality and efficiency of organic polluted soil remediation.