31 results about "Ecotoxicity" patented technology

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 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 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 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.

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.

The invention discloses a water environment pollutant ecological risk sorting system and method in the technical field of water environment pollutant monitoring, and the system comprises a water environment pollutant exposure module which is used for obtaining the pollutant exposure data of each pollutant in the water environment of a monitoring region; the water environment pollutant ecological effect module is used for acquiring water ecological toxicity effect data of corresponding pollutants; the data analysis module is used for obtaining an exposure characteristic value and obtaining an effect characteristic value; and the risk sorting module is used for obtaining risk values of the corresponding pollutants according to the exposure characteristic values and the effect characteristic values, and carrying out risk sorting display on the pollutants. According to the invention, the pollutant exposure data and the water ecological toxicity effect data of the corresponding pollutants are obtained and then are processed through the data analysis module and the risk sorting module, so that the monitoring data and the toxicity data are effectively combined to improve the accuracy of the risk sorting result, and an environment manager can conveniently carry out rapid identification and targeted management and control on various pollutants.

The present invention relates to the use of a cnidarian-dinoflagellate symbiotic organism as a marker for assessing the ecotoxicity of a product. The present invention also relates to a method for assessing the ecotoxicity of a product, comprising the following steps: 1) culturing at least one cnidarian-dinoflagellate symbiotic organism in a suitable medium, 2) adding at least one product to the medium, 3) measuring, in the medium and in the cnidarian, the dissociation of the dinoflagellates from the symbiosis and / or the growth rate of cnidarian cuttings, particularly hard corals. Figure 1

The invention provides a heavy metal stabilized material long-term effectiveness evaluation method based on high-temperature accelerated aging, which comprises the following steps: mixing a chitosan loaded scrap iron composite material with arsenic and antimony polluted soil, then carrying out short-term stabilization treatment, and then setting high-temperature accelerated aging parameters by adopting a heat conservation algorithm in combination with annual mean temperature difference. The long-term stability mechanism of the material in an extreme environment is disclosed by utilizing RAC risk assessment index, BCR continuous extraction morphological analysis and mung bean germination toxicity experiment synchronous monitoring. Experiments show that after simulation for 100 years, the TCLP leaching concentration of arsenic / antimony is always below a safety limit value, the residue state proportion is increased to 14.84-36.51%, the RAC value is always at a risk-free level, and the germination rate of mung beans can reach 100%. According to the invention, regional differentiation aging simulation and ecological toxicity joint evaluation are realized for the first time, and an accurate prediction tool is provided for engineering application of heavy metal stabilized materials.

The invention relates to the field of molecular biology and environmental biology, and discloses a primer group, a kit and application thereof.The primer group comprises primer pairs used for specific amplification of a cyp1a1 gene and a primer pair used for specific amplification of an ahr2 gene respectively, and the primer pairs used for specific amplification of the cyp1a1 gene comprise an upstream primer with the nucleotide sequence shown as SEQ ID NO.1 and a downstream primer with the nucleotide sequence shown as SEQ ID NO.2; the primer pair for specifically amplifying the ahr2 gene comprises an upstream primer with the nucleotide sequence shown as SEQ ID NO.3 and a downstream primer with the nucleotide sequence shown as SEQ ID NO.4. The invention further discloses a kit for detecting the ahr2 gene. By utilizing the primer group provided by the invention, the toxic reaction of an organism to an environmental sample (petrochemical pollutants) can be represented, and the backtracking of benzene series in the petrochemical pollutants is realized; the primer group can be applied to component optimization of oilfield auxiliaries, improvement of a sewage treatment technology, evaluation of biotoxicity and ecotoxicity of benzene series in a petrochemical polluted site and provision of a basis for guiding remediation of the petrochemical polluted site.

The invention provides an ecological influence assessment method and system for an environment-friendly snow-melting agent, and relates to the technical field of environmental protection. The method comprises the following steps: carrying out a seed growth influence test; after the seed growth influence test is finished, obtaining seed weight data of the experimental group and the control group; determining a relative growth influence index according to the seed weight data; before the snow-melting agent is applied, collecting first surface soil samples and first surface water samples of the plurality of sampling units; collecting a second surface soil sample and a second surface water sample of the same sampling unit in a preset number of days after the snow-melting agent is applied; determining a microbial activity inhibition index; determining an ecological toxicity response index; according to the relative growth influence index, the microbial activity inhibition index and the ecological toxicity response index, determining the ecological influence grade of the environment-friendly snow-melting agent. According to the invention, the ecological influence of the environment-friendly snow-melting agent can be evaluated from multiple dimensions, and the accuracy and reliability of evaluation are improved.

The invention provides an ampullaria gigas-based prochloraz pesticide ecotoxicity detection method, which comprises the following steps: collecting or domesticating ampullaria gigas, and distinguishing individuals in a new hatching period and individuals in an adult period as test organisms; the method comprises the following steps: respectively exposing new hatching period pomacea canaliculata and adult period pomacea canaliculata in prochloraz aqueous solutions with different concentrations, exposing for 96 hours, and regularly observing and recording the survival individual number, the inhibited individual number and the individual number with escape behavior in each group during the period; the method comprises the following steps: exposing adult pomacea canaliculata in a series of prochloraz aqueous solutions with sublethal concentrations for 21 days, and regularly measuring and recording shell height and weight of the pomacea canaliculata bodies during exposure; taking the exposed hepatopancreas, kidney and stomach tissues of the ampullaria gigas, and carrying out histopathologic observation and analysis; the invention also provides application of the detection method in evaluating the ecotoxicity of the prochloraz pesticide. The pesticide toxicity can be rapidly and systematically tested through the easily obtained pomacea canaliculata, and the detection method is comprehensive and convenient to operate.

The invention discloses a shield muck heavy metal and organic matter combined pollution risk assessment and ecological risk identification method. The method comprises the following steps: S1, systematic sample collection and standardized pretreatment; s2, comprehensive characterization of physicochemical and engineering properties of the soil body; s3, finely analyzing the total amount and the chemical form of the pollutants; s4, performing multi-dimensional pollution risk quantitative evaluation; s5, biologically verifying the ecological toxicity effect; and S6, risk tracing, correlation analysis and hierarchical management and control strategy making. The method is not only suitable for environmental risk pre-assessment and process management and control of newly-built and under-construction shield tunnel projects, but also can be used for environmental risk investigation and repair decision support of existing shield muck storage yards and disposal sites, and provides scientific basis and technical support for safe disposal and resource utilization of shield muck and green transformation of shield construction.

The invention relates to the technical field of rare earth ion recovery, in particular to a method for catalytic degradation of FQs by DFT analog calculation of a modified rice hull biochar material, which comprises the following steps: DFT analog calculation of an MOF modified rice hull biochar composite material structure and FQs active site distribution; the MOF modified rice husk biochar composite material and an FQs solution are mixed and stirred under simulated sunlight, and the photocatalytic degradation effect of the MOF modified rice husk biochar composite material on FQs in a water medium is obtained. The photocatalytic degradation effect of the MOF modified rice hull biochar composite material on FQs in a surface soil medium is obtained; the MOF modified rice husk biochar composite material is applied to lettuce seedlings stressed by FQs under simulated sunlight, and after lettuce is mature, the influence of the MOF modified rice husk biochar composite material on the ecological toxicity of the FQs is evaluated. The MOF modified rice husk biochar disclosed by the invention can be used for remarkably improving the photocatalytic degradation performance on FQs.

The present application belongs to the technical field of bioengineering. The present application discloses a bacillus pumilus 21-14, the strain has been preserved in the China General Microbiological Culture Collection Center (CGMCC) on September 6, 2024, the center is abbreviated as CGMCC, the strain preservation center registration number is CGMCC NO.31892, the strain preservation date is September 6, 2024, and the address of the preservation unit is No.3, Beichen West Road, Chaoyang District, Beijing. The bacillus pumilus strain 21-14 provided by the present application is simple to culture, short in cycle, free of ecological toxicity, rich in types of available carbon sources, strong in salt and alkali tolerance, capable of promoting the growth and development of potatoes through phosphorus solubilization and IAA production, beneficial to promoting the improvement of the biomass of crops in saline-alkali soil, and capable of effectively inhibiting the growth of streptomyces prolixus.

The application discloses a wet maintenance method for a nuclear power plant, which comprises the following steps: emptying the secondary side of a steam generator and filling a wet maintenance liquid; the wet maintenance liquid contains carbazochrome; the pH value of a system and the concentration of carbazochrome are monitored, so that the concentration of carbazochrome in the system is 90-120 mg / kg, and the pH value is 10-10.5; the molecular structural formula of the carbazochrome is CON4H5R, wherein R is -C x H y , x is a natural number greater than or equal to 0, and y is a natural number greater than or equal to 1. The wet maintenance method for the nuclear power plant adopts carbazochrome, the ecological toxicity of which is lower than that of hydrazine, and the reaction product mainly comprises nitrogen, water and carbon dioxide, so that no harmful by-product is generated, and the problems of ecological toxicity of hydrazine and poor room temperature maintenance effect of hydrazine during the wet maintenance stage of the steam generator of the nuclear power plant can be solved.

The invention belongs to the technical field of bioengineering, and particularly relates to a 3D zebra fish hepatocyte line model, a construction method and application thereof, and a hepatotoxicity evaluation method. The 3D cell spheroid is constructed by culturing a zebra fish hepatocyte line (ZFL) by adopting a 3D cell culture technology. The 3D model can simulate the physiological function of the organ tissue more truly and reliably and reflect toxic damage of pollutants to the organ tissue more accurately in toxicology, and the limitation of a 2D cell culture technology and a traditional animal model is made up. The constructed 3D cell model is used for evaluating the hepatotoxicity of the PPD-Qs substances to the zebra fish, so that a more reliable tool is provided for ecotoxicity evaluation. Besides, the comprehensive evaluation system is provided by combining multiple indexes such as morphological analysis, growth curve statistics, cell activity detection and the like, and the growth condition of the 3D hepatocyte model can be comprehensively and accurately evaluated.

This invention discloses a protein fiber-iron phytic acid composite flocculant, its preparation method, and its application. The preparation method includes: hydrolyzing protein powder under alkaline conditions, followed by cross-linking with epichlorohydrin to obtain epoxy-functionalized protein fibers; reacting phytic acid with an Fe salt precursor to prepare an Fe-phytic acid complex; and reacting the epoxy-functionalized protein fibers with the Fe-phytic acid complex to obtain the composite flocculant. This composite flocculant is a nanocomposite material with a three-dimensional network structure and high specific surface area, possessing excellent flocculation and sedimentation capabilities and broad-spectrum bactericidal properties. In wastewater treatment systems, it can simultaneously achieve sludge structure stabilization, pathogenic microorganism control, and ecotoxicity mitigation, effectively replacing traditional aluminum salts, iron salts, and chlorine-containing bactericides, which pose safety hazards. It demonstrates good adaptability and engineering feasibility in dealing with high organic loads and complex microbial systems.

The invention discloses a preparation method and application of iron modified biochar, and relates to the field of wastewater treatment. The method comprises the following steps: mixing the iron-containing industrial solid waste with an acid solution, carrying out acid leaching treatment, and carrying out solid-liquid separation to obtain an iron-containing leachate; and mixing a biomass raw material with the iron-containing leachate, dipping, drying, carrying out pyrolysis in an inert atmosphere, and carrying out post-treatment on the obtained pyrolysis product to obtain the iron-modified biochar. According to the preparation method, a biomass raw material is impregnated and pyrolyzed by virtue of a leaching solution obtained by acid leaching of iron-containing industrial solid wastes, and iron species in the solid wastes are loaded onto biochar, so that the heterogeneous catalyst containing rich catalytic active sites is constructed. The iron-modified biochar can efficiently activate persulfate, deeply degrade organic pollutants such as antibiotics in a water body in a wide pH range, reduce ecological toxicity and realize high-value utilization of wastes and raw materials.

The invention discloses a QSAR-ML-based soil organic matter ecological toxicity prediction and risk assessment method, which comprises the following steps: acquiring environmental parameters, biological species characteristics and molecular descriptors of target organic matters containing multiple species, and carrying out fusion and standardization processing to generate target multi-scale characteristic vectors corresponding to the target organic matters; inputting each target multi-scale feature vector into a trained ecotoxicity prediction model to obtain a non-effect concentration value corresponding to each of the target organic matters of the multiple species; fitting a species sensitivity distribution curve based on the plurality of non-effect concentration values, calculating a harmful concentration value for protecting species in a preset percentage, and deducing an ecological safety threshold value of the target organic matter in a specific environment according to the harmful concentration value; and evaluating the ecological risk of the target organic matter in the specific environment according to the ecological safety threshold and the actually measured exposure concentration of the target organic matter. According to the method, the precision of toxicity prediction and risk assessment of the organic pollutants can be improved.

The invention belongs to the technical field of water pollution biological monitoring, and discloses a water pollution early warning system and method based on non-intrusive corbicula fluminea behavior quantitative analysis, and the method comprises the following steps: carrying out image acquisition on multi-temporal behavior data of corbicula fluminea in a target pollution area; extracting a short-term sensitive index and a long-term stable index from the multi-temporal behavior data, and calculating index values of the short-term sensitive index and the long-term stable index; and determining the pollution level of the target pollution area by comparing the index value with an early warning threshold value. Specifically, the short-term sensitive index comprises the escape diffusion rate of the corbicula fluminea in a first preset time, and the long-term stable index comprises the diffusion area ratio and the digging rate of the corbicula fluminea in a second preset time; the early warning threshold value comprises a basic threshold value and a grading threshold value. In conclusion, water environment ecotoxicity assessment is realized based on quantitative analysis of corbicula fluminea behaviors, and effective technical support can be provided for health monitoring of a fresh water ecosystem.

The invention discloses a menthone derivative capable of repelling granary pests as well as a preparation method and application of the menthone derivative. The molecular structure expression of the menthone derivative is shown as a formula A; the menthone derivative provided by the invention not only has an enhanced insecticidal effect and an insect repelling effect, but also is good in thermal stability, and the lasting period is remarkably prolonged. In addition, degradation products are glycerol and carbon dioxide, and ecological toxicity assessment shows that the degradation products meet the low-residue standard of green pesticides. .

To provide an ecotoxicity monitoring device using a luminescent bacterium and an ecotoxicity monitoring method using the same.SOLUTION: An ecotoxicity monitoring device using a luminescent bacterium and an ecotoxicity monitoring method using the same are provided. The ecotoxicity monitoring device comprises: a reaction tank module including a reference reaction tank, a sample reaction tank, and a dilution reaction tank, and supplies a mixed solution containing the luminescent bacterium; a luminescent bacterium culture portion; a diluted water supply portion; a sample supply portion; an optical measurement portion that measures the amount of luminescence of the luminescent bacterium in a toxicity assessment substance provided from the sample reaction tank and the dilution reaction tank; a control portion; and an analysis portion that determines whether a toxic substance is present a sample on the basis of a light quantity value provided from the optical measurement portion. After time predetermined as an initial light quantity value of the reference reaction tank measured through the optical measurement portion has elapsed, the analysis portion is configured to calculate a correction coefficient through the measured final light quantity value, and calculate a corrected light quantity value of the sample reaction tank and dilution reaction tank through the calculated correction coefficient.SELECTED DRAWING: Figure 1

The invention discloses an environment-friendly disposable degradable meal box which comprises a box body and a box cover, wherein the box body sequentially comprises a hydrophobic layer, a matrix layer, a reinforcing layer and a heat preservation layer from inside to outside; the matrix layer is formed by blending polylactic acid (PLA) and polyhydroxyalkanoate (PHA) according to the mass ratio of (3-5): 1, and a modified filler accounting for 10-20% of the total mass of the matrix layer is added; through the synergistic effect of the PLA-PHA blending matrix layer and the transition metal salt / plant polyphenol composite filler, a Fenton reaction is triggered in a soil environment to accelerate chain breakage, and meanwhile, plant polyphenol is chelated with metal ions to avoid agglomeration. The degradation process is quantitatively regulated and controlled in combination with a degradation kinetic formula, the degradation rate is improved compared with that of a traditional PLA lunch box, and a degradation product is free of ecological toxicity.