57 results about "Ecotoxicity" patented technology

The invention relates to the technical field of offshore floating structures, in particular to an offshore floating structure ecological risk prediction method which comprises the following steps: S1, data collection: collecting environmental data around an offshore floating structure; s2, data preprocessing: preprocessing the collected environment data; s3, sediment ecotoxicity analysis: evaluating the influence of pollutants in the sediment on marine organisms and the ecological environment; s4, establishing an ecological risk model: predicting the ecological risk of the offshore floating structure; s5, model training and verification: adjusting ecological risk model parameters; s6, risk assessment: predicting the risk of the marine floating structure to the surrounding ecological environment; and S7, report generation: generating an ecological risk assessment report based on a risk prediction result output by the ecological risk model. According to the method, the potential risk of the marine floating structure to the surrounding ecological environment can be comprehensively and accurately predicted.

The invention belongs to the technical field of bioengineering. The invention discloses a bacillus altitudinis strain DXT2-4 CGMCC (China General Microbiological Culture Collection Center) NO.25810. The bacillus altitudinis strain DXT2-4 is preserved in the China General Microbiological Culture Collection Center (CGMCC for short) on June 29, 2023, the registration number of the preservation center is CGMCC NO.25810, the preservation date is June 29, 2023, and the address of the preservation unit is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing. The bacillus altitudinis strain DXT2-4 provided by the invention is simple to culture, short in period, free of ecological toxicity, rich in available carbon source variety and high in salt tolerance, can promote growth and development of a rice root system and produce cellulase to decompose cellulose through phosphorus solubilizing, siderophore producing and the like, is beneficial to soil remediation, can effectively inhibit growth of streptomyces scabies, and has a good application prospect. The resistance is good.

The invention belongs to the field of biotoxicity monitoring and ecotoxicity detection, and particularly relates to a pollutant exposure device suitable for aquatic organisms and a large-scale simulation continuous dilution method. The device comprises a cylinder body with an open top end, a buffer area, a contamination area and a water outlet area are sequentially arranged in the cylinder body, the buffer area and the contamination area as well as the contamination area and the water outlet area are separated through partition plates, holes are formed in the partition plates, the buffer area, the contamination area and the water outlet area are provided with an internal circulation system, and the internal circulation system comprises a submersible pump, a circulation water pipe and an aeration assembly. According to the method, the device is used for simulating the condition that a real water body receives sewage, dispersion and dilution of pollutants are achieved through water flow and aeration, circular flowing of the pollutants and the water body is achieved through the circulating system, and the real concentration capable of being contacted by organisms is simulated through the water inlet flow of water containing the pollutants entering the device; the method has a relatively strong application prospect in the fields of nondestructive online monitoring of sewage and wastewater, toxicity simulation of pollutants entering a large-scale water body and the like.

The invention discloses a method for promoting photodegradation of coexisting ciprofloxacin and reducing ecological toxicity of the coexisting ciprofloxacin by active oxygen generated by photoaging polystyrene microplastics. The polystyrene micro-plastic PS-MPs is subjected to light irradiation to be aged to a certain degree, and surface physicochemical property changes of the PS micro-plastic PS-MPs are represented through SEM, FTIR and XPS. Especially in the coexistence of aged PS, the degradation rate (67%) of CIP is almost three times of the degradation rate (21%) of CIP in the presence of original PS. Quenching experiments and steady-state concentration experiments prove that the enhancement of CIP photodegradation by aged PS-MPs is related to reactive oxygen species (ROS) generated on the surfaces of the aged PS-MPs, and < 1 > O2 plays a leading role in the photodegradation process of CIP. Bacteria inhibition experiments prove that in the presence of aged PS, the biotoxicity of CIP is weakened. The method also shows a relatively strong application effect in actual water bodies.

The invention relates to the technical field of environment monitoring and intelligent sensors, and particularly discloses a soil pollutant detection and analysis system based on an intelligent sensor. The system comprises a sensor array module, a data preprocessing and fusion module, an ecological toxicity dynamic evaluation module and a decision output module. According to the invention, the biological response sensing unit capable of directly reflecting the ecological effect is integrated, and the ecological toxicity dynamic evaluation model fusing the concentration, the biological response and the environmental factors is innovatively constructed, so that direct and dynamic quantification from the pollutant content to the ecological risk is realized. According to the method, the problem that an existing assessment method is insufficient in biological correlation is solved, the risk assessment result is closer to the real ecological environment effect, and a reliable basis is provided for precise treatment.

The invention relates to the technical field of environmental engineering, agricultural chemistry or microbiology, and provides a nitrification inhibitor and application thereof. The nitrification inhibitor is N-ethylpiperazine, the growth of AOB can be inhibited at a low dosage (10 mg / L or 0.1 g / kg) so as to inhibit nitrification, and the ecological toxicity and potential biological accumulation of the nitrification inhibitor are not reported in a chemical safety technical specification (SDS), so that the nitrification inhibitor is environment-friendly and can be applied to water treatment and nitrification inhibition in soil.

The invention discloses a protein fiber-iron phytic acid composite flocculant as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out hydrolysis reaction on protein powder under an alkaline condition, and then cross-linking through epichlorohydrin to obtain epoxy group functionalized protein fibers; reacting phytic acid with an Fe salt precursor to prepare an Fe-phytic acid complex; and reacting the epoxy group functionalized protein fiber with the Fe-phytic acid complex to obtain the composite flocculant. The composite flocculant is a nano composite material with a three-dimensional network structure and a high specific surface area, has excellent flocculating settling capacity and broad-spectrum bactericidal performance, and can synchronously realize stable sludge structure, pathogenic microorganism control and ecological toxicity reduction in a sewage treatment system; the method effectively replaces traditional agents with potential safety hazards such as aluminum salt, ferric salt and chlorine-containing bactericide, and shows good adaptability and engineering feasibility under the condition of coping with high organic load and complex microbial systems.

The application provides a soluble liquid agent containing flonicamid and acetamiprid, and a preparation method and application thereof. The soluble liquid agent is composed of flonicamid, acetamiprid, a solvent, a cosolvent, a surfactant, a pH regulator, a penetration enhancer and ethanol. The application reduces ecological toxicity by selecting suitable auxiliaries, has the advantages of small drift, slow evaporation, strong adhesion, good spreading, wetting and adhesion effects on targets, long retention time, rainwater erosion resistance, and improved pesticide penetration, so that the pesticide can act faster. In addition, the soluble liquid agent prepared by the application can meet the requirements of pest control under different water qualities and meet the requirements of field application under complex climate conditions. The soluble liquid agent of the application is an agricultural insecticide with good insecticidal effect, simple production process and no environmental pollution.

The invention relates to the technical field of pesticides, in particular to a pesticide composition based on marine bioactive substances and a preparation method of the pesticide composition. The environment-friendly water-based detergent is prepared from the following raw materials in percentage by weight: 20 to 25 percent of sulfated brown algae polyphenol microcapsules, 8 to 12 percent of sodium alginate, 0.1 to 1 percent of phosphatidylcholine, 2 to 3 percent of alkylphenol polyoxyethylene ether, 1 to 3 percent of fatty alcohol-polyoxyethylene ether, 0.5 to 2 percent of azone, 2 to 5 percent of propylene glycol, 0.2 to 1 percent of organic silicon defoaming agent and the balance of water. According to the pesticide composition prepared by the invention, through slow release and targeted release, the lasting period is prolonged, and the bioavailability is improved. Meanwhile, non-target organism exposure is reduced, and ecological toxicity is reduced.

The present invention relates to a method for determining the ecotoxicity of black matter in soil, which comprises the following steps: S1. medium preparation: soil containing black matter is used as a test medium, and is mixed with peat in a ratio to form a test specimen, which is placed in a plurality of specimen bottles for standby use; S2. biological culture test: a plurality of specimen bottles are divided into two groups, the first group is subjected to an earthworm toxicity test, and the second group is subjected to a plant germination rate test; S3. observation and statistics of test results: for the earthworm toxicity test of the first group, the average body weight Z7 of earthworms at 7 days and the average number of surviving earthworms Y at 14 days are counted; for the plant germination rate test of the second group, the average number of germinated seeds D is counted; S4. the ecotoxicity level is determined by calculating the test data. The advantage is that the present invention effectively combines the earthworm animal test and the plant germination rate culture test, and can quickly, accurately and comprehensively determine the ecotoxicity of soil containing black matter.

The present application belongs to the field of biological toxicity monitoring and ecological toxicity detection, and particularly relates to a pollutant exposure device suitable for aquatic organisms and a large-scale simulation continuous dilution method. The device comprises a cylinder with an open top, a buffer zone, a toxicant exposure zone and a water outlet zone arranged in sequence in the cylinder, the buffer zone and the toxicant exposure zone, and the toxicant exposure zone and the water outlet zone are separated by a partition, the partition is perforated, the buffer zone, the toxicant exposure zone and the water outlet zone are provided with an internal circulation system, and the internal circulation system comprises a submersible pump, a circulating water pipe and an aeration assembly. The method simulates the condition that a real water body receives sewage by using the device, the dispersion and dilution of pollutants are achieved by water flow and aeration, the circulation of pollutants and water bodies is achieved by a circulating system, the water inlet flow of the device is achieved by water containing pollutants, the real concentration that organisms can contact is simulated, and the method has strong application prospects in the fields of non-destructive online monitoring of sewage and wastewater and toxicity simulation of pollutants entering large-scale water bodies.

The invention relates to the technical field of pesticides, in particular to a microemulsion containing abamectin and flonicamid. The flonicamid and abamectin compounded suspending agent is prepared from a flonicamid active compound, an abamectin active compound, a solvent, a coupling agent, an emulsifier, a synergistic aid and deionized water. The environment-friendly solvent is used, pollution to the environment is avoided, the ecological toxicity is low, the oil-water interface compatibility can be effectively improved, and the contact angle is reduced. Meanwhile, the microemulsion prepared by the invention is high in stability and long in lasting period, and can meet field requirements under complex climate conditions.

The application discloses a soil cadmium environmental ecological toxicity data screening processing method and application, and comprises the following steps: S1, obtaining ecological toxicity data, S2, screening data, S3, processing data, the screening processing method can obtain high-quality data, and the data is processed to a uniform level, which is more convenient for analysis and calculation; through the simulation of the species sensitivity distribution model by using the screened data, fitting parameters can be obtained, and the sensitivity distribution of ecological species to pollutants can be mastered to a large extent according to limited ecological toxicity data.

The present application relates to the technical field of river ecological risk assessment, and provides a method for evaluating the ecotoxicity effect of tailwater replenishment river channels using benthic animals. By first evaluating the assessment scope of the river, each assessment river is divided into multiple assessment river sections, a corresponding number of monitoring points are set in each assessment river section, benthic animals are used as assessment species, and field surveys are conducted at each monitoring point. Combined with environmental DNA technology, multiple biological indices of large benthic organisms in different assessment river sections are obtained, and then various biological indices of large benthic organisms in different assessment river sections are compared and analyzed. If the number of biological indices that show a downward trend from downstream to upstream among all biological indices exceeds a preset quantitative threshold, and all biological indices show a downward trend as time increases, it is determined that there is an ecotoxicity effect. Multiple, long-time interval surveys and multi-dimensional, multi-indicator analysis methods are used to accurately evaluate the ecotoxicity effect of tailwater on receiving water bodies.

The present invention relates to the technical field of offshore floating structures, and specifically relates to a method for predicting the ecological risks of offshore floating structures, comprising the following steps: S1, data collection: collecting environmental data around the offshore floating structure; S2, data preprocessing: preprocessing the collected environmental data; S3, sediment ecological toxicity analysis: evaluating the impact of pollutants in sediments on marine organisms and the ecological environment; S4, establishing an ecological risk model: predicting the ecological risks of the offshore floating structure; S5, model training and verification: adjusting the parameters of the ecological risk model; S6, risk assessment: predicting the risks of the offshore floating structure to the surrounding ecological environment; S7, report generation: generating an ecological risk assessment report based on the risk prediction results output by the ecological risk model. The present invention can comprehensively and accurately predict the potential risks of offshore floating structures to the surrounding ecological environment.

The present invention discloses a recombinant vector and application method for determining the activity of dioxin-like substances based on the mouse aromatic hydrocarbon receptor, and relates to a genetic engineering. This study mainly selects and intercepts the efficient mouse aromatic hydrocarbon receptor AHR expression sequence through molecular cell biology means, amplifies and subclones it into the pBIND expression vector dedicated to mammalian single hybridization; after successful sequencing verification, the pBIND expression vector and the mammalian single hybridization reporter gene vector pG5luc are co-transfected, and then dioxin-like substances are added to carry out compound activity determination, as well as sensitivity indicators related to the mouse AHR receptor. The present invention is based on the systematic optimization of the mammalian single hybridization reporter gene technology, establishes a toxicological test method, solves the problem of efficient cross-species toxicity assessment, and provides an effective tool for studying the ecotoxicity risk of new dioxin-like pollutants by enhancing the detection sensitivity.

The invention relates to the technical field of precious metal extraction, and particularly discloses a low-toxicity environment-friendly precious metal extracting agent which comprises the following components in percentage by mass: 20-40% of an alkaline thiourea component, 30-50% of a thiocyanate component, 2-8% of an anionic surfactant A, 2-8% of an anionic surfactant B, 5-15% of an alkaline regulator and 0.1-2% of a stabilizer, the alkaline thiourea and thiocyanate dual coordination system in the extracting agent can synergistically generate an active ligand with mixed coordination of-SC (NH2) 2 and SCN-in an alkaline medium, cyano contained in the extracting agent is stably combined in a thiourea or thiocyanate skeleton in a covalent bond form and does not exist in a free CN-form, and the leakage risk and acute toxicity are greatly reduced. In addition, the system can be broken and reduced into non-toxic small molecules in a natural environment or wastewater in several weeks through microbial action, chemical hydrolysis and other ways, design degradation is achieved, and long-term environmental accumulation and ecological toxicity are effectively reduced.

One embodiment of the present invention provides an ecotoxicity monitoring device using Aliivibrio fischeri, and an ecotoxicity monitoring method using the same. The ecotoxicity monitoring device includes a reaction tank module, an Aliivibrio fischeri culture unit, a diluted water supply unit, a sample supply unit, an optical measurement unit, a control unit and an analysis unit, wherein the analysis unit is configured to calculate a correction coefficient based on the initial light quantity value of a reference reaction tank measured through the optical measurement unit and the final light quantity value measured after a predetermined time has elapsed, and calculate the corrected light quantity values of a sample reaction tank and a dilution reaction tank based on the calculated correction coefficient.

The present invention belongs to the field of ecological pollution monitoring, relates to data analysis technology, and is used to solve the problem that the existing environmental pollutant ecotoxicity effect threshold concentration measurement method cannot set and optimize the ecotoxicity threshold concentration in combination with the plant growth status in the planting area. Specifically, it is an environmental pollutant ecotoxicity effect threshold concentration measurement method, which includes the following steps: Step 1: regional monitoring and analysis of pollutant concentrations in an ecological monitoring area: the ecological monitoring area is divided into several monitoring areas, a monitoring cycle is generated, atmospheric data DQ, water data ST and soil data TR of the monitoring area within the monitoring cycle are obtained, and numerical calculations are performed to obtain the pollution coefficient WR of the monitoring area within the monitoring cycle; the present invention performs regional monitoring and analysis of pollutant concentrations in the ecological monitoring area, improves the accuracy of pollutant concentration monitoring results by regional division, and provides data support for threshold concentration measurement.

The present application provides a method for preparing humic acid by activating coal gasification slag, a soil improvement material and its application, and relates to the technical field of resource utilization of coal gasification slag, comprising the following steps: mixing coal gasification slag with organic activation matrix to form a biological reactor; the organic activation matrix comprises at least one of livestock and poultry manure and its compost; the biological reactor is reacted under aerobic conditions, so that the stable carbon structure in the coal gasification slag is biologically activated, and the generation of humic acid and the conversion of fulvic acid to humic acid are promoted, and a soil improvement material is obtained. The present application not only has simple process and low energy consumption, is conducive to the high-value resource utilization of coal gasification slag, but also can significantly improve the content of humic acid and the stability of total humic acid, the product has no obvious ecological toxicity, and is conducive to the improvement of barren soil and the improvement of farmland soil nutrients.

The invention belongs to the technical field of biological prevention and control of plant diseases, and particularly relates to application of streptomyces rust GJ15 in prevention and control of cotton verticillium wilt and growth promotion. The invention provides a streptomyces rubignus GJ15, and the preservation number of the streptomyces rubignus GJ15 is CGMCC (China General Microbiological Culture Collection Center) No.36046. The streptomyces rubignus GJ15 can be used for preparing a strain of streptomyces rubignus GJ15. The strain GJ15 has been preserved in the China General Microbiological Culture Collection Center on September 23, 2025, and the preservation number is CGMCC NO.36046. The China General Microbiological Culture Collection Center is called CGMCC for short, and the address of the China General Microbiological Culture Collection Center is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing. The streptomyces rust GJ15 provided by the invention is free of ecological toxicity, high in safety and relatively simple to culture, has an antagonistic effect on verticillium dahliae, can obviously improve the resistance of cotton plants to verticillium wilt caused by verticillium dahliae, and can promote the growth of cotton at the same time.

The invention belongs to the field of biological and ecological toxicity monitoring and aquatic organism behavior analysis, and particularly discloses an improved fish behavior analysis tank based on a camera shooting technology and a behavior parameter evaluation method. The problems of monitoring dead angles, false positive and the like caused by image deformation when a common camera is used for monitoring and identifying a fish body are solved. The device comprises a cylinder body and a partition plate assembly, the inner wall of the partition plate assembly is parallel to a camera shooting light path, the partition plate assembly is composed of a plurality of partition plates with gradually-changed thicknesses, and the thicknesses of the partition plates are gradually reduced in the camera shooting light path direction. The partition plate assembly comprises a left partition plate and a right partition plate, excrement grooves are formed in the bottoms of the left partition plate and the right partition plate, and a plurality of evenly-distributed water inlet and outlet through holes are formed in the upper middle portions of the left partition plate and the right partition plate. When the camera shooting light path is in the vertical direction, the partition plate assembly further comprises a front side partition plate and a rear side partition plate. When the camera shooting light path is in the horizontal direction, the partition plate assembly further comprises a bottom partition plate and a top partition plate.

One embodiment of the present invention provides an ecotoxicity monitoring device using Aliivibrio fischeri, and an ecotoxicity monitoring method using the same. The ecotoxicity monitoring device includes a reaction tank module including a reference reaction tank, a sample reaction tank, and a dilution reaction tank and provided with a bacterial dilution tank configured to supply a mixed solution including Aliivibrio fischeri to the reference reaction tank, the sample reaction tank, and the dilution reaction tank; an Aliivibrio fischeri culture unit configured to supply Aliivibrio fischeri, which detect whether a sample is toxic, to the bacterial dilution tank; a diluted water supply unit configured to supply diluted water to the bacterial dilution tank, the reference reaction tank, and the dilution reaction tank; a sample supply unit configured to supply a sample to the sample reaction tank and the dilution reaction tank; an optical measurement unit configured to measure an amount of luminescence of Aliivibrio fischeri in a toxicity assessment substance provided from the reference reaction tank and the sample reaction tank and the dilution reaction tank to which the sample is supplied; a control unit configured to control the operation of the reaction tank module, the Aliivibrio fischeri culture unit, the diluted water supply unit, the sample supply unit, and the optical measurement unit; and an analysis unit configured to judge whether a toxic substance is present in the sample based on the light quantity value provided from the optical measurement unit, wherein the analysis unit is configured to calculate a correction coefficient based on the initial light quantity value of the reference reaction tank measured through the optical measurement unit and the final light quantity value measured after a predetermined time has elapsed, and calculate the corrected light quantity values of the sample reaction tank and the dilution reaction tank based on the calculated correction coefficient.

The present invention relates to the fields of environmental engineering, agricultural chemistry, or microbiology, and provides a nitrification inhibitor and its use. The nitrification inhibitor is N-ethylpiperazine, which can inhibit the growth of AOB and thus nitrification at a relatively low dose (10 mg / L or 0.1 g / kg). Furthermore, its Material Safety Data Sheet (SDS) does not report its ecotoxicity or potential bioaccumulation, demonstrating its environmental friendliness and its application in water treatment and soil to inhibit nitrification.

The invention discloses a method for promoting polystyrene micro-plastics to generate H2O2 to accelerate aging of the micro-plastics by environmental factors, the polystyrene micro-plastics promote H2O2 generated in the light aging process to be converted into reactive oxygen species (ROS) under the combined action of humic acid (HA) and ionic strength through the action of optical radiation, so that the light aging of the micro-plastics is accelerated. In the presence of HA and salinity, the light aging of micro-plastics in a water environment becomes more complicated, and subsequent products influence the ecological toxicity of pollutants. HA and ionic strength adopted in the method can promote H2O2 to be converted into ROS, the photoaging effect of PS is finally promoted, H2O2 determination proves that H2O2 is consumed in an HA and salinity system, and XPS and FTIR determination proves that oxygen-containing functional groups on the surface of the micro-plastic are increased. In addition, electron paramagnetic resonance and quenching experiments prove that. OH is used as a dominant active substance for photoaging of micro-plastics.

The present invention discloses a method and application for the aquatic ecological toxicity and risk assessment of gatifloxacin based on zebrafish. The steps of the method include: S1 establishing a zebrafish experimental model, selecting zebrafish larvae 3 days after fertilization, according to a standardized breeding procedure; S2, toxicity assessment, calculating the maximum non-lethal concentration (MNLC) and 10% lethal concentration (LC 10 ); S3, assessment of hepatotoxicity indicators; S4, histopathological analysis; S5, detection of the oxidative stress response status; S6, exploring the molecular mechanism by detecting the relative expression levels of PPAR-γ , CYP1A1 and CYP1B1 genes by qPCR; S7, data analysis. The method of the present invention combines morphological, histological, oxidative stress response and molecular mechanism studies, provides a multi-scale evaluation system for the toxicity monitoring of trace drugs in the water environment, and helps to better protect the water ecological environment and public health safety.

The invention relates to the technical field of slow-release scale inhibitors and particularly discloses a porous nano-microcapsule slow-release malic acid composite scale inhibitor and a preparation method thereof, and the porous nano-microcapsule slow-release malic acid composite scale inhibitor comprises the following components in percentage by mass: 15-20% of a porous nano-microcapsule slow-release malic acid scale inhibitor, 5-12% of an auxiliary scale inhibition dispersant, 3-9% of a green corrosion inhibitor, 0.1-3.0% of a penetrant and the balance of deionized water. According to the invention, a large amount of biodegradable and low-ecotoxicity natural or synthetic substances are used, the biodegradability and environmental compatibility of the scale inhibitor product are enhanced, and meanwhile, the scale inhibitor also integrates the functions of descaling, antibiosis, slow release and the like. Wherein the porous nano-microcapsule slow-release malic acid scale inhibitor also has self-disintegration property, so that circulating residues can be reduced.

The invention belongs to the technical field of insecticides, and discloses an S-methoprene-containing mosquito-killing solid block formula and a process, the S-methoprene-containing mosquito-killing solid block formula comprises the following components by weight: 10% of an S-methoprene active compound, 58% of a carrier, 20% of a binder, 6% of a slow-release matrix, 4% of a lubricant, 0.5% of a synthetic antioxidant, 1% of an ultraviolet screening agent, and 0.5% of a plasticizer. The carrier is diatomite subjected to hydrophobic treatment, and the hydrophobic treatment process of the diatomite comprises the following steps: drying the diatomite at 120 DEG C for 2 hours, performing spraying treatment by using a 5% silane coupling agent, and activating at 80 DEG C for 1 hour. According to the scheme, HPMC E5 is adopted as a slow-release substrate, and a hydrophobic diatomite carrier and an optimization process are combined, so that stable release of S-methoprene is ensured, the lasting period is as long as 90 days or above, the sustained-release preparation is suitable for long-term storage scenes such as marine transportation, chemicals do not need to be supplemented midway, and the maintenance cost is remarkably reduced. As an internationally recognized safe biopesticide, the S-methoprene is free of ecological toxicity and meets the environmental protection requirement for prevention and control of input mosquito-borne diseases in international trade.

Products and methods related to the enhancement of efficacy of algaecides and / or aquatic herbicides using metallic trivalent cations, as well as the reduction in ecotoxicity and non-target effects and preservation of water quality. Some embodiments advantageously provide the benefit of binding phosphorus, but allow for a substantial reduction in the dissolved trivalent metal and an increased ability to target the main source of future phosphorus release. In one aspect of an embodiment, a trivalent cation delivery system includes a commonly available commodity that can be simultaneously added to the water or mixed in a tank prior to the application, avoiding the need for an industrial process to cohere the components. In another aspect of the embodiment, the trivalent cation delivery system may be accomplished by the use of an algaecide and / or aquatic herbicide prior to the application of the phosphorus binding metal.

This invention relates to the field of farmland soil remediation technology, and in particular to a comprehensive evaluation method for the remediation effect of heavy metal-contaminated farmland soil. The method includes: constructing a four-criteria hierarchical evaluation system encompassing pollution load, ecotoxicity, soil health, and remediation cost; selecting at least three time points covering the initial, middle, and late stages within the remediation cycle, and simultaneously collecting index data for the divided remediation units; after standardizing the data, integrating subjective and objective weights using a combined weighting method based on the optimization of the sum of squared deviations; calculating a comprehensive evaluation index for each node, determining grade thresholds and classifying them using dynamic clustering; generating a spatiotemporal evolution map, identifying key limiting factors for "medium" and "poor" grade units, and outputting a diagnostic report containing dynamic evaluation, heterogeneity analysis, and optimization suggestions. This invention provides comprehensive evaluation, reliable data, and objective results, and can support precise control of remediation projects.