852 results about "Soil remediation" patented technology

The invention relates to the technical field of environmental governance and remediation, in particular to a combined contaminated site soil remediation data management method, which comprises the following steps of: firstly, integrating multi-source heterogeneous data through a unified space-time coordinate system to generate a fusion data pool, and then driving a pollution assessment model to generate a multi-dimensional space-time pollution map; and then intelligently matching a candidate repair process chain based on an associated knowledge base, performing iteration deduction through a dynamic multi-objective optimization engine to obtain an optimal repair scheme, converting the optimal repair scheme into a digital regulation and control instruction, and finally monitoring an execution state and environmental response data in real time and feeding back and updating a data pool to realize closed-loop optimization. According to the method, the data quality and the pollution evaluation accuracy are improved, the adaptability of the repair process and the cost performance of the scheme are optimized, the repair effect is ensured to be stable and reach the standard, and the efficiency and reliability of the repair project are improved.

The invention relates to the technical field of soil remediation, in particular to a biochar-humic acid-calcium alginic acid composite saline-alkali soil modifier and a preparation and application method thereof. The modifier adopts a multi-layer structure design: biochar is pre-adsorbed by calcium chloride, compounded with sodium humate, and then crosslinked with sodium alginate to form a gel to form a composite inner core; secondly, sulfobetaine methacrylate and vinyl phosphonic acid are introduced into a sodium alginate molecular chain through graft polymerization, and modified sodium alginate is obtained to serve as an outer layer coating material; and finally, dipping the composite inner core into the outer layer solution, and carrying out graded recalcification by calcium chloride and short-time treatment by sodium sulfate to obtain a final product. Through the synergistic effect of calcium ion slow release of the inner core and zwitterionic characteristics of the outer layer, efficient replacement and long-term stable regulation and control of soil sodium ions are achieved, the pH value, the conductivity and the alkalization degree of soil are remarkably reduced, the water holding capacity is effectively improved, and the soil conditioner is suitable for sustainable improvement of moderate and severe saline-alkali soil.

The invention relates to the technical field of soil remediation, in particular to an extracting and backfilling device for soil remediation, which comprises a main frame, electric crawler wheel mechanisms mounted at the front end and the rear end of the main frame, and a driving motor mounted inside the main frame. According to the extracting and backfilling device for soil remediation, the transverse remediation barrel, the left inclined feeding barrel and the right inclined discharging barrel which communicate with one another are fixedly mounted at the upper end of the main frame through bolts; an internal inclined transmission rod and a transverse transmission rod are synchronously driven to rotate through a driving motor on the transverse repairing cylinder; and the soil is guided into the transversely-arranged repairing barrel to be rolled and repaired by matching with the structure-adjustable bottom sealing covers at the opening ends of the left inclined feeding barrel and theright inclined discharging barrel, and then is guided out to the shoveling end to be backfilled and flattened, so that the operation efficiency of soil repairing is greatly improved.

The invention belongs to the technical field of crop pollution prevention, and particularly relates to a rice heavy metal adsorption and isolation method based on iron agent regulation and control. According to the method, the iron agent is applied to the polluted rice field soil to induce the soil-rhizosphere interface to form an iron film, heavy metals (such as As, Cu, Pb and Cd) are fixed by virtue of adsorption and complexing effects of the iron agent, and migration of the heavy metals to rice roots is reduced, so that accumulation of the heavy metals at edible parts (leaves and ears) of the rice is reduced; the tolerance of the rice in a polluted environment is enhanced; and the risk of heavy metals in a food chain is reduced. Experiments show; through treatment of an iron film formed by a certain iron-based concentration, accumulation of the heavy metals in the rice leaves can be remarkably reduced, and the accumulation amount of the heavy metals in the rice leaves is far lower than the accumulation amount (1 / 40-1 / 120) of the heavy metals in rice roots. The invention provides an effective solution for farmland soil remediation and crop safety production.

The invention relates to the technical field of heavy metal contaminated soil remediation, in particular to a plant-microorganism-passivator synergistic remediation method for a heavy metal contaminated farmland, which comprises the following steps: step 1, constructing a soil digital twinborn model; step 2, intelligent decision making and verification of a collaborative restoration scheme; 3, soil pretreatment before remediation; step 4, hierarchical collaborative restoration and dynamic regulation and control; 5, performing long-term verification on the repair effect and performing model iteration; physical heat treatment is used as strengthening pretreatment, the occurrence form of heavy metal is changed through high temperature, biomass charcoal is generated in situ, passivation immobilization-microbial strengthening-plant extraction three-stage collaborative operation is carried out according to the time sequence, pollutants are rapidly locked through a passivating agent, rhizosphere immobilization is strengthened through functional microorganisms, plant growth is promoted, and the quality of plants is improved. And the hyperaccumulator finally removes the heavy metals from the soil, so that the unification of short-term control and long-term reduction is realized.

The invention discloses an ecological value calculation method based on scene application and ecological behaviors. The method comprises the following steps: acquiring multi-source data required by ecological value calculation; cleaning and standardizing the multi-source data, removing abnormal values, complementing missing data, and generating a structured data set which can be used for modeling; an ecological value calculation model is constructed, and the model comprises a scene application ecological value model used for calculating ecological service values in different marketization scenes; the ecological behavior value contribution model is used for calculating ecological value contributions of ecological behaviors of seedling planting, soil restoration and water source restoration developed by the social subject; and the ecological value calculation model generates an ecological value calculation report based on the structured data set, wherein the report comprises each index weight, a calculation process and an ecological value result. According to the method, ecological behavior differences and regional characteristics are considered, and scientificity, applicability and economic transformation benefits of an ecological value calculation result are improved.

The invention relates to the technical field of soil remediation and improvement sampling, in particular to a sampling device based on municipal soil remediation and improvement, which comprises a taking-out cutting ring for sampling municipal soil, one end of the taking-out cutting ring is a closed end, and the other end of the taking-out cutting ring is an open end; an inserting cylinder is connected to the outer side of the taking-out cutting ring in a matched mode, a fixing shell is fixedly installed on the outer side of the end, away from the opening end of the taking-out cutting ring, of the inserting cylinder, and a locking piece is arranged between the fixing shell and the inserting cylinder and used for clamping the taking-out cutting ring; according to the device, the insertion cylinder and the sampling cutting ring are stably inserted into sampled soil, so that the strength of the sampling cutting ring inserted into the sampled soil is the same, and the situation that the sampling cutting ring is subjected to different knocking strength is avoided; and the sampling integrity and representativeness of different positions for municipal soil remediation and improvement are further ensured.

The application discloses a new device for pre-acidification process combined with cathode buffer zone electric dynamic remediation of heavy metal contaminated soil and a construction method, and belongs to the field of electric dynamic remediation of heavy metal contaminated soil. The device comprises a soil remediation chamber and a sewage treatment chamber. The soil remediation chamber is open at the top, is provided with an anode plate on one side, and is provided with a cathode plate on the opposite side. Filter paper is attached to the two sides of the anode plate and the cathode plate. The cathode plate is further provided with a cathode buffer chamber opposite the anode plate. The anode plate and the cathode plate are connected through wires, a power supply and a sensor. The soil remediation chamber is connected with the sewage treatment chamber on the side provided with the cathode plate, and a gap is formed between the soil remediation chamber and the sewage treatment chamber to allow liquid to flow from the soil remediation chamber into the sewage treatment chamber. The sewage treatment chamber is provided with adsorption material. The sewage treatment chamber is provided with a drainage hole and a drainage pipe at the bottom end. The method can effectively remove heavy metals in sewage and can avoid the possibility of secondary pollution of the environment caused by electric dynamic remediation of sewage.

The invention relates to the cross technical field of industrial solid waste resource utilization and environmental pollution abatement, and discloses a modified fly ash environmental remediation material as well as a preparation method and application thereof. According to the material, industrial solid waste fly ash is used as a raw material, a glass body structure is destroyed through physical or chemical modification treatment, the specific surface area is increased, active functional groups such as surface hydroxyl groups are enriched, and the adsorption and fixation capacity on heavy metal lead (Pb < 2 + >) and cadmium (Cd < 2 + >) is remarkably improved. The chemical modification adopts an acid solution or an alkali solution, and the preparation method comprises the steps of raw material pretreatment, modification reaction, solid-liquid separation and washing, and drying and screening. When the material is applied to heavy metal contaminated soil remediation, heavy metal in an ion exchange state is promoted to be converted into a stable residue state, the bioavailability and the leaching risk of the heavy metal are remarkably reduced, meanwhile, high-added-value resource utilization of the fly ash is achieved, and the material has environmental, economic and social benefits and is suitable for large-scale remediation of Pb and Cd single or combined contaminated soil.

The invention provides a method for strengthening plant microorganism combined remediation of heavy metal contaminated soil, and relates to the technical field of soil remediation. The method for strengthening the plant and microorganism combined remediation of the heavy metal contaminated soil comprises the following steps: a) selecting and planting pioneer plants with tolerance to target heavy metal; b) applying a compound microbial agent containing at least two functional microorganisms, wherein the functional microorganisms comprise plant growth-promoting bacteria and microorganisms forming a symbiotic relationship with plants; c) loading the functional microorganisms on a biochar carrier, and applying the biochar carrier to soil; d) selectively adding an exogenous chelating agent according to the effective state concentration of the heavy metals in the soil; and e) selectively carrying out genetic engineering modification on the functional microorganisms or pioneer plants according to repair requirements. The technology is high in flexibility, optimization combination can be carried out according to different heavy metal types, combined pollution and soil conditions, and the advantages of high efficiency, environmental safety and long-term sustainability of the remediation process are achieved.

The invention discloses a method for in-situ passivation of available cadmium in soil, and belongs to the technical field of heavy metal contaminated soil treatment. According to the method, the fulvic acid with the molecular weight being 100 kDa or above is applied to the acid mining area soil with the pH being 2-4.5 according to the adding amount of 3-20 gC / kg, the low-concentration cadmium pollution of the source being 4 mg / kg or below is removed, the concentration of effective-state cadmium is reduced, the cost is saved, the natural substance fulvic acid is used as the remediation agent, operation is easy and convenient, and the method is suitable for remediation of various mining area soil.

The invention discloses a synthetic microbial agent for treating uranium-contaminated soil and a preparation method of the synthetic microbial agent. The synthetic microbial agent is prepared from the following bacteria: P.adami, P.megatherium, bacillus subtilis, Artobacter volluticus, symbiotic fungi, Aspergillus niger, sulfate reducing bacteria and Shewanella. The symbiotic fungi are mucor lastein, mucor unimingguminum, mucor circinelloides, mucor dense, rhizopus arrhizus and phylum phthochytrium parasitic fungi. The prepared synthetic microbial agent and synthetic microbial embedded balls are applied to uranium-contaminated soil remediation, the key enzyme activity can be effectively improved, the soil metabolism function is enhanced, meanwhile, exchangeable uranium with high ecological risk is converted into stable and low-harm residual uranium, the mobility and bioavailability of uranium in soil are effectively weakened, and the uranium-contaminated soil remediation effect is improved. Therefore, immobilized remediation of uranium is realized, and a good soil uranium fixing effect is achieved.

The invention belongs to the technical field of photo-thermal evaporation materials, and discloses a composite photo-thermal material Fe / PANI / GF and a preparation method and application thereof. The preparation method of the composite photo-thermal material Fe / PANI / GF comprises the following steps: taking graphite felt (GF), and activating at high temperature to obtain activated graphite felt; uniformly depositing polyaniline on the surface of the activated graphite felt by adopting a constant current method or a cyclic voltammetry to obtain acid-doped polyaniline (PANIES / GF); and dipping the acid-doped polyaniline in a ferric salt solution or a ferrous salt solution, and dispersing and loading Fe on the PANI nano-particle layer through Fe-N coordination to obtain the composite photo-thermal material Fe / PANI / GF. The method shows wide application prospects in the fields of seawater desalination, high-salinity wastewater treatment, heat-assisted power generation, photo-thermal driven sterilization, soil remediation and the like, and an innovative scheme is provided for solving the problems that a traditional photo-thermal material is low in efficiency, poor in stability, high in cost and the like.

The utility model discloses a covering film laying device for soil remediation, relates to the technical field of agricultural machinery, and solves the technical problem that an existing covering film fixing mode is low in working efficiency. The covering film laying device for soil remediation comprises a supporting assembly, a pressing and fixing assembly and a power assembly, the supporting assembly comprises a support and a supporting shaft, the two ends of the supporting shaft are rotationally connected with the support, and the supporting shaft is sleeved with a film body; the pressing and fixing assembly comprises two first connecting rods, a pressing roller and two extrusion wheels, the two first connecting rods are symmetrically connected to the two sides of the support, the two ends of the pressing roller are rotationally connected with the two first connecting rods correspondingly, and the two extrusion wheels are arranged on the two sides of the pressing roller in a sleeving mode correspondingly; the power assembly is connected with the supporting shaft and provides a power source for the supporting shaft. According to the device, mechanical operation can be achieved, the working efficiency is greatly improved, and the requirement for modern efficient and large-scale soil remediation operation is met.

The invention discloses a soil turning device for soil remediation, and relates to the technical field of soil turning remediation. Comprising a soil loosening installation part, and a screening device is installed on the soil loosening installation part and used for screening stones; a pressing auxiliary part is mounted on the soil loosening mounting part; the pressing auxiliary part is used for promoting the clay to pass through the screening device; the screening device is provided with a line cutting and soil turning piece; a repairing and spreading part is mounted on the soil loosening mounting part; a linear cutting soil turning part is adopted, clay can be subjected to particle cutting, normal movement is not affected, when clay accumulated in a screening mounting shell is discharged between a row of screening cutting plates, linear cutting work is assisted, square particles are formed in an assisted mode, and the clay can be cut into particles through the mode that the square particles fall off after being formed; the situation that massive clay cannot be crushed in time can be effectively prevented; the problem that an existing soil turning device for soil remediation is poor in looseness during clay turning is solved.

The invention relates to the technical field of soil remediation, and discloses a preparation method and an application method of geotechnical cloth for remediation or barrier of heavy metal contaminated soil. The graft modified keratin geotextile is prepared through pretreatment, cleaning, geotextile processing preparation and modification treatment. When the graft modified keratin geotextile is used for repairing the heavy metal contaminated soil, the graft modified keratin geotextile is laid below or inside the contaminated soil, and heavy metal ions in the soil are released into a liquid phase through leaching treatment and are adsorbed and fixed by the graft modified keratin geotextile. The method is efficient in treatment, can adsorb and remove heavy metals in the soil within a week, solves the problem of heavy metal migration and diffusion in a traditional remediation technology, is free of secondary pollution, can guarantee the original physicochemical properties of the soil, treats pollution with waste, and is low in cost. In addition, the composite material can also be used as an isolating layer, effectively avoids diffusion of heavy metal in soil, and has a wide application prospect.

The invention relates to the technical field of soil remediation, in particular to an iron-modified cow dung biochar material and a preparation method thereof and application in remediation of cadmium-copper contaminated soil. Cow dung is used as a raw material, pretreated cow dung is obtained through natural airing, dewatering and smashing, then the pretreated cow dung and a ferrous chloride solution are mixed, stirred, filtered, dried and ground, and the iron-modified cow dung biochar material is obtained. And pyrolyzing under the protection of inert gas. The iron-modified biochar has a porous layered structure, rich oxygen-containing functional groups and iron-based active sites, has a pH value close to neutrality, and can effectively adapt to the farmland soil environment. The material can remarkably reduce the effective state content of cadmium and copper in soil, promote conversion of heavy metal to a stable residue state, reduce migration of heavy metal in pore water and improve the enzyme activity and nutrient effectiveness of the soil at the same time, the grain cadmium accumulation reduction amplitude reaches 71.65% and the copper accumulation reduction amplitude reaches 29.36% in the rice growth process, and therefore the cadmium and copper combined polluted soil is efficiently repaired, and the quality of the rice is improved. And crop safety and soil health are guaranteed.

The application discloses a soil remediation test device for environmental protection and relates to the technical field of soil remediation.The soil remediation test device comprises a rack, a test spacer sleeve is rotatably arranged in the lifting slide, the test spacer sleeve can rotate automatically, outer spiral fins are arranged on the outer side of the test spacer sleeve, a plurality of groups of capillary metal pipes are arranged on the bottom of the piston plate, an inner metal core is arranged in each capillary metal pipe, a guide hole is formed through the inner wall of the transmission cavity, a plurality of groups of sampling ports are formed on the outer side of the capillary metal pipe, a sampling baffle can block the sampling ports, and a water absorption block is arranged in the middle of the sampling baffle.The capillary metal pipe groups are pressed into the soil, a plurality of groups of capillary pipes are crossly and gradiently inserted into the soil due to the spiral distribution of the transmission cavity and the piston plate, the approximate flow direction of the leaching liquid in the soil can be judged through the wetting conditions of the plurality of groups of capillary pipes, and the adjustment of the leaching position during subsequent remediation is facilitated.

This invention discloses a controlled drainage ecological regulation method for synergistic irrigation and drainage to reduce salinity and alkalinity, belonging to the field of soil remediation technology. The method includes: a soaking and dissolving stage, where, with the drainage outlet closed, low-flow irrigation is performed at the farthest point from the drainage ditch, allowing a large amount of irrigation water to enter the small pores of the soil profile and soak and dissolve salts; a diffusion and dispersion stage, where the drainage outlet is raised, and with the outlet height lower than the field surface, large-flow irrigation is performed evenly, filling all pores of the soil profile with irrigation water and enhancing the diffusion and dispersion of salts; a convection desalination stage, where the drainage outlet is opened, and with the outlet depth level with the drainage ditch depth, saline water is evenly discharged from the soil; and a water-saving and emission-reduction stage, where the drainage outlet depth is lower than the crop root zone, breaking the connectivity of small pores and preventing soil salts from moving upwards during crop growth. This synergistic irrigation and drainage achieves the three major goals of salt control, water conservation, and emission reduction.

The present application relates to the technical field of soil remediation, and particularly relates to a salt and alkali resisting and reducing equipment suitable for saline and alkaline soil, which comprises a mounting frame, a feeding assembly mounted on the mounting frame, a power assembly, the power assembly connected to the mounting frame, a soil separating plate connected to the power assembly and in a hollow shape, a conveying assembly for continuously conveying salt separating layer materials connected to the soil separating plate, a guide plate arranged on each side of the soil separating plate, a mounting cylinder fixedly connected to the lower part of the soil separating plate, and two outer arc plates in symmetrical distribution rotatably connected to the mounting cylinder. The two outer arc plates are pushed by two connecting rods to expand to opposite sides with the mounting cylinder as the center, and change from a combined shape to an acute angle shape, so as to push the powdery soil on the outer sides of the two outer arc plates to the two sides. At the same time, the two outer arc plates move out of the fan-shaped grooves with corresponding fan-shaped springs, so that the expanded outer arc plates and the fan-shaped springs separate a space for laying corn stalks at the lower part of the ploughing layer.

The utility model discloses a soil pollution abatement and remediation device which comprises a frame body, a transversely-arranged supporting plate is arranged at the bottom end of the frame body, moving wheels used for moving are arranged at the bottom of one end of the frame body, a liquid storage tank connected with the frame body is arranged above the supporting plate, a liquid inlet hopper is arranged at the top of the liquid storage tank, and the bottom end of the liquid storage tank is communicated with a water pump. And one end of the drainage pipe is connected with a spraying mechanism. The liquid medicine in the liquid storage tank is sprayed out through the spraying mechanism through the water pump, and soil remediation liquid spraying remediation work on soil is achieved. And one end of the circular ring can drive the adjusting plates to move in the same direction or back to back, so that the spraying angle of each spray head is adjusted, the spraying range of the repairing liquid is widened, and the repairing efficiency is improved.

The invention relates to the field of soil remediation, in particular to a soil crushing, dosing and mixing device for soil remediation. According to the soil conditioner, soil and a chemical conditioner can be more sufficiently and uniformly mixed, the concentration of heavy metal ions in the soil is more effectively reduced, and therefore the treatment efficiency of the soil is more effectively improved. The invention discloses a soil crushing, dosing and mixing device for soil treatment. The device comprises supporting legs, a working box, a feeding hopper and the like, a working box is fixedly connected between the tops of the two supporting legs, and the top of the working box communicates with a feeding hopper. According to the device, the extrusion frame rotates and reciprocates up and down to extrude, crush and disperse soil, so that small-particle soil enters the working box along the extrusion frame, and a chemical modifier sprayed by a plurality of spraying nozzles of a pesticide spraying pipe is in uniform contact with the dispersed soil, so that the concentration of heavy metal ions in the soil is reduced; the soil treatment efficiency is improved.

The application belongs to the technical field of contaminated soil remediation, and particularly relates to modified montmorillonite for synergistically remediating heavy metals and organic pollutants in soil as well as a preparation method and application thereof. Hexadecyl trimethyl ammonium bromide (CTAB) and dodecyl trimethyl ammonium bromide (DTAB) are used as modifiers to prepare organic modified montmorillonite, and mercury ions (Hg 2+ ) and acetochlor (ACR) are used as representative substances of heavy metals and organic pollutants to study the effects of the two kinds of organic modified montmorillonite on remediation of Hg 2+ and ACR compound contaminated soil. The results show that the two kinds of organic modified montmorillonite have good removal effects on Hg 2+ and ACR in real soil samples, and can simultaneously remove Hg 2+ and ACR in soil. The removal rates of CTAB modified montmorillonite and DTAB modified montmorillonite can both reach more than 90%. The organic modified montmorillonite prepared by using CTAB and DTAB as modifiers can simultaneously remove Hg 2+ and ACR in soil, and can synergistically remediate Hg 2+ and ACR compound contaminated soil.

The utility model relates to the technical field of soil treatment and drying, and discloses a drying machine for soil treatment samples, which comprises a drying box, three hot-air blowers are arranged at the top of the drying box, filter screens are arranged at the input ends of the three hot-air blowers, a moving plate is connected to the inside of the drying box in a sliding manner, and a baffle is fixedly mounted on the outer wall of the moving plate. An arrow plate is arranged on the outer wall of the rotating disc, and a plurality of air outlet holes are formed in the outer wall of the drying box. According to the drying machine for the soil treatment sample, when the soil remediation sample needs to be dried, a handle is moved to drive a moving plate to move, soil to be dried is placed on a base plate, an air heater is started, a motor drives a rotating shaft to rotate, a knocking rod is driven to rotate, and a beating rod drives the base plate to move upwards; and the base plate moves downwards, the base plate vibrates, the effect of throwing up the soil through vibration can be achieved, the air heater can dry the soil, and the rapid and uniform drying effect is achieved.

The utility model belongs to the technical field of soil remediation devices, and discloses a wetland soil remediation device which comprises a mounting frame, a stirring tank penetrating through the top of the mounting frame and fixed and a liquid inlet pipe fixed and communicated with the top of the stirring tank, a stirring mechanism and a discharging mechanism are arranged on the stirring tank, and a feeding mechanism is arranged on the mounting frame. The feeding mechanism comprises a screening assembly, the screening assembly comprises a screening box fixed to the top of the mounting frame, a screening barrel arranged on the inner wall of the side, away from the stirring tank, of the screening box and a feeding hopper fixed to the side wall of the side, away from the stirring tank, of the screening box, and the discharging end of the feeding hopper extends into the screening barrel. A plurality of through holes are formed in the side wall of the screening barrel in a penetrating mode. The feeding mechanism further comprises a conveying assembly and a feeding assembly. According to the soil remediation device, through the arrangement of the screening assembly, the content of water in soil is reduced, the risk that the remediation liquid is diluted by the water is reduced, and therefore the waste of the remediation liquid is reduced.

The invention belongs to the technical field of agricultural equipment, and relates to a crushing and pesticide mixing device for soil pollution remediation, which comprises a movable frame, a connecting seat, two mounting plates, a crushing mechanism, a fixed shaft, an avoiding groove, a plurality of pesticide feeding holes, a transmission cylinder, a plurality of groups of spray pipes, a plurality of spray holes and a pesticide feeding mechanism, and the rotating mechanism is used for driving the transmission cylinder to drive the multiple sets of spraying pipes to rotate, liquid medicine is fed into soil of different depths, and meanwhile the soil is stirred. The crushing mechanism is arranged at the front end of the movable vehicle frame, the pesticide spraying mechanism composed of the fixed shaft, the transmission cylinder and the multiple sets of spraying pipes is arranged at the front end of the movable vehicle frame, soil crushing and pesticide spraying can be conducted firstly, the multiple sets of spraying pipes are driven to rotate through the rotating mechanism, liquid pesticide is fed into soil of different depths, and meanwhile the soil is stirred; and the soil and the medicine can be mixed more uniformly, different medicine concentrations in the soil with different depths are avoided, soil remediation is accelerated, and the soil remediation effect is improved.

The invention provides a silicon fertilizer composition, a preparation method thereof, a silicon fertilizer compounding model and a prediction system, and belongs to the field of intelligent agriculture. The preparation method of the silicon fertilizer composition comprises the following steps: by taking silicon-containing industrial waste as a raw material, carrying out chlorine gas reaction, leaching to remove soluble substances by using water in one path, retaining solid substances, and carrying out hydrothermal reaction with a sodium carbonate or potassium carbonate aqueous solution; the other path is immersed in strong alkali liquor at the temperature of 180-200 DEG C to obtain a CaSiO3 component; and compounding the two products according to the required ratio to obtain the silicon fertilizer composition. The problems of high energy consumption and high cost of traditional silicon fertilizer production are solved, the production cost is reduced by 50% or above, the soil remediation efficiency is improved by 40%, and the method is suitable for soil hardening remediation, desertification control, waste reclamation and other scenes and provides key technical support for intelligent agriculture development.

The application discloses a special leaching agent for organic matter and heavy metal compound contaminated soil and a preparation method thereof, relates to the technical field of leaching agents for compound contaminated soil and preparation thereof, and the preparation steps are as follows: first, carboxyl-modified fulvic acid is prepared, a mineral source fulvic acid is taken to prepare a suspension, high-purity nitrogen is introduced to remove oxygen, and then ammonium persulfate initiator is added; after water bath heating, acrylic acid monomer is uniformly and slowly added for reaction; after the reaction is completed, the system pH is adjusted; after dialysis and impurity removal, freeze-drying is carried out to obtain modified fulvic acid with an acrylic acid grafting rate of 15% to 30%; and the modified fulvic acid is taken to prepare a phosphate buffer suspension. The application improves the number of active functional groups of fulvic acid through acrylic acid grafting modification, greatly enhances the heavy metal chelation and polycyclic aromatic hydrocarbon solubilization capacity, and covalently crosslinks functional bacteria on the fulvic acid carrier, so that the functional bacteria can be adapted to different acid-base values of contaminated sites and are suitable for soil remediation of various compound contaminated sites.

The utility model relates to a heavy metal contaminated soil remediation agent spraying device, which comprises a frame, a front wheel and a rear wheel are respectively arranged on the frame, and the heavy metal contaminated soil remediation agent spraying device is characterized in that a soil turning device and a spraying device are respectively arranged on the frame; wherein the soil turning device comprises a mounting frame rotationally arranged on the lower side of the frame and a driving component for driving the mounting frame to swing and turn over, and a plurality of plowshares are arranged on the mounting frame at intervals in the direction from the front wheels to the rear wheels. The plowshares located on the mounting frame swing along with the mounting frame to form soil turning depths of different horizontal depths relative to the frame, so that the soil turning depths of the plowshares are controlled, the plowshares are arranged in a step-shaped progressive increase mode, layered soil turning is achieved, soil resistance is reduced, a repairing agent is sprayed to the turned soil in cooperation with the spraying device, and the soil turning efficiency is improved. Therefore, the remediation agent can be quickly and uniformly dispersed to remedy the soil.

This invention discloses a land remediation device and method, relating to the field of heavy metal contaminated land remediation technology in the advanced environmental protection industry. The device comprises a vehicle and a rotary tiller. A mounting frame is fixedly connected to the side wall of the rotary tiller, and two symmetrically arranged movable frames are connected to the side wall of the mounting frame via a first reset mechanism. A downwardly inclined shovel plate is fixedly connected to the side wall of each movable frame, and two inclined guide plates are fixedly connected to the side wall of the shovel plate. This land remediation device and method can transport and evenly spread broken soil. During the spreading process, reducing agents are evenly sprayed onto the soil, resulting in more uniform mixing. Simultaneously, it can cover the sprayed microbial solution, thereby improving the efficiency and effectiveness of soil remediation. Furthermore, it allows for automatic adjustment of the spraying volume based on the vehicle's movement speed, ensuring spraying effectiveness while avoiding waste of microbial solution and reducing agents.