104 results about "Arsenic pollution" patented technology

The invention relates to the technical field of remediation for synergistic treatment of rice field soil arsenic and greenhouse gas emission reduction, in particular to a zero-valent manganese nitrate synergistic soil remediation agent and application thereof to remediation of rice field arsenic pollution and inhibition of greenhouse effect. The invention provides a technical scheme for synergistically repairing arsenic pollution in the rice field and inhibiting the greenhouse effect based on zero-valent manganese / nitrate, an electron transfer shunt network driven by manganese circulation is constructed, a slow release reaction-dynamic regeneration-electron shunt three-in-one system is constructed, and synergistic interaction of arsenic fixation and greenhouse gas emission reduction is realized. According to the technical scheme, the potential regulation and control contradiction between arsenic fixation aerobic and carbon reduction anaerobic is successfully broken, and an innovative solution is provided for multi-target remediation of rice field soil. According to the self-sustaining circulating system, the specific surface area of the manganese oxide is stabilized at 50m < 2 > / g to 120m < 2 > / g, and the regeneration rate is gt; 95%. Experiments show that compared with a single technology, the synergistic treatment group improves the arsenic fixing efficiency to 100%, and the comprehensive emission reduction intensity of greenhouse gas reaches 76%.

The invention discloses an underground water arsenic pollution range dynamic delimiting method based on multi-source data fusion, and the method comprises the steps: employing a fixed monitoring well and a mobile unmanned aerial vehicle water quality sensing device to cooperatively work, and constructing a dynamic monitoring network; hydrogeological data, hydrochemical parameters and meteorological data are integrated, a hydrochemical parameter inversion model is established, and arsenic form distribution is predicted through the Fe / S concentration ratio; carrying out three-dimensional pollution plume dynamic modeling by adopting an improved MT3DMS model, and introducing a time attenuation coefficient to correct adsorption-desorption kinetic parameters; establishing a pollution diffusion probability prediction model by using an XGBoost algorithm, and predicting a pollution diffusion boundary based on a machine learning algorithm; and performing visual output to generate a dynamic risk grading graph. According to the method, the arsenic pollution range can be dynamically updated, and the pollution range delimiting precision is effectively improved.

The invention relates to the technical field of wet-process phosphoric acid, and discloses a wet-process phosphoric acid grading and arsenic removal treatment method and system, and the system can be switched between a parallel grading treatment mode and a series depth treatment mode through flow control; in the parallel mode, the two arsenic removal reaction tanks operate independently to respectively treat different raw materials and produce desulfurized acid for industrial monoammonium and low-arsenic dilute phosphoric acid for high-phosphorus compound fertilizer, the low-arsenic dilute phosphoric acid is mixed and blended with untreated dilute acid and then concentrated, qualified products are obtained with the minimum treatment capacity, and the cost is remarkably reduced; in the series connection mode, raw materials sequentially flow through the two tanks to be deeply purified, and single high-quality phosphoric acid is produced; the two modes are both integrated with efficient filter pressing units, solid-liquid separation is carried out on arsenic-containing thick slurry generated by arsenic removal, and phosphorus resource recovery and arsenic pollution control are achieved; the device has production flexibility and deep purification capacity, perfectly meets the requirements of raw material fluctuation and multiple products, and thoroughly solves the problem of arsenic slag disposal.

The invention discloses a polyurethane foam loaded schwertmannite material as well as a preparation method and application thereof, and belongs to the technical field of environmental governance materials. According to the material, polyurethane foam is added in the synthesis process of the Schwertmannite to complete loading of the Schwertmannite, the material has the advantages of efficient arsenic removal of the Schwertmannite and good adsorption performance of the polyurethane foam, and when the material is applied to treatment of arsenic-polluted water, efficient removal of arsenic can be achieved, and the material is greener and more environmentally friendly. The polyurethane foam loaded Schwertmannite material is simple in preparation process and has a good regeneration effect, regeneration and reutilization are achieved through elution of an alkaline solution, it is verified that the arsenic removal effect of the polyurethane foam loaded Schwertmannite material is not obviously affected, the utilization rate of the Schwertmannite material is greatly increased, and the treatment cost of arsenic-polluted water is reduced. The material provided by the invention can be suitable for in-situ treatment of different arsenic-polluted water bodies, is simple in use process and low in cost, and has a good application prospect.

The application discloses a kind of rice field soil arsenic pollution reduction repair method, comprising the following steps: S1, rice seedling raising;S2, in 1-2 weeks before transplanting, to the arsenic pollution rice field soil to be repaired modified biochar is added, then waterlogging treatment is carried out;S3, 1-2 weeks later, shallow water rice transplanting is carried out, and 3-5 days are waited for rice seedling to return green, and water is intensified management;S4, in early heading stage of rice, aboveground rice straw is harvested from field, then soil ploughing is deep ploughing and broken, irrigation is carried out, so that root system floats to water surface, and is all collected from field;S5, level field and drain to surface layer contains shallow water, repeat steps S2-S4.The application is loaded on biochar by microorganism and combined with the method of water intensification management plant absorption, in heading stage of rice, aboveground straw enriched with arsenic is removed from field with underground root system as a whole, and combined with periodic repetition operation, the total amount of arsenic in soil is substantially reduced.

The invention discloses a repairing agent for promoting mineralization of arsenic in soil and a preparation method and application thereof.The preparation method includes the steps that after agricultural straw is smashed, the smashed agricultural straw and livestock and poultry manure are alternately stacked layer by layer for composting, and organic fertilizer is obtained; the method comprises the following steps: mixing an organic fertilizer with ultrapure water, performing ball milling in a ball mill, centrifuging the ball-milled mixed solution, and filtering to obtain a dissolved organic matter (DOM) extracting solution; and forming the repairing agent together with sulfate. When in use, the repairing agent is added into the arsenic-polluted soil, and then the arsenic in the soil is mineralized by anaerobic waterflooding soil culture. By the adoption of the scheme, the micromolecular active DOM can be easily obtained from agricultural straw and livestock and poultry manure, the micromolecular active DOM is matched with sulfate to be applied, the remarkable promoting effect on reduction of soil arsenic bioavailability is achieved, the method is low in cost, and agricultural solid waste resource utilization and soil safety are easily achieved.

A process for producing a catalyst comprising a metal from group VIB and / or a metal from group VIII, and an oxide support(s), characterized in that said process comprises recycling the metals from group VIB and / or VIII from a source catalyst comprising a metal common to the catalyst to be produced, said source catalyst being contaminated with coke, vanadium and arsenic, the process comprising: - an extraction of vanadium by an extraction solution comprising sulfuric acid, then - a regeneration, then - an extraction of the metal or metals from group VIB and / or VIII by an extraction solution comprising an organic compound having complexing properties, then - an impregnation of the support with an impregnation solution from said solution of extracted group VIII and / or VIB metal(s), said extracted metal(s) remaining in liquid phase from the extraction by sulfuric acid until the impregnation.

This invention belongs to the field of non-ferrous metallurgy and hazardous waste treatment technology, proposing a method for reducing arsenic content using a synergistic hydrothermal reaction of low-grade lead-zinc ore and polluted acid. The method involves pre-decalcifying the low-grade lead-zinc ore with dilute hydrochloric acid to remove interfering calcium carbonate. Then, by controlling the mass ratio of active metals such as Pb, Zn, and Fe in the ore powder to As in the polluted acid, under specific hydrothermal conditions, the in-situ release and induced precipitation of metal ions within the ore are stimulated, constructing thermodynamically extremely stable onionite and onionite-like mineral phases. The arsenic removal rate of this invention is consistently above 95%, and the stability of the arsenic-fixed products far exceeds national hazardous waste landfill standards. This method not only solves the problem of arsenic pollution from polluted acid but also simultaneously realizes the resource utilization of low-grade ore, demonstrating significant environmental and economic benefits.

The invention discloses an underground water arsenic pollution multiphase flow reaction migration substitution simulation method based on cDC-GAN, and relates to the technical field of underground water pollution simulation. The technical scheme is characterized by comprising the following steps: constructing a numerical model for simulating underground water multiphase flow and pollutant reaction migration process; the numerical model can output pollutant concentration spatial distribution according to input permeability field parameters and well location layout parameters; after the combination of permeability field parameters and well location layout parameters is changed, the numerical model is operated to obtain a data set, and then a training data set is formed; wherein the data set comprises input data and output data, the input data are permeability field and well location layout parameters, and the output data are corresponding pollutant concentration spatial distribution; constructing a cDC-GAN substitution model, wherein the cDC-GAN substitution model comprises a generator and a discriminator; the method has the effect of expanding the application scene of groundwater pollution simulation.

This invention relates to a method for remediating arsenic-contaminated farmland; the method includes the following steps: applying base fertilizer to the farmland and tilling it evenly, wherein the base fertilizer includes organic fertilizer, and the amount of organic fertilizer applied is 200-500 kg / mu; transplanting cotton seedlings into the farmland and managing water; irrigating the cotton seedlings with a prepared sodium silicate solution; managing fertilizer and planting during the cotton growth process, and applying an activator that promotes the translocation of heavy metals into the cotton plants; harvesting the cotton when it matures and cutting the straw. This remediation method, through planting cotton and using organic fertilizer, irrigation with sodium silicate solution, and application of an activator, can promote the absorption of the heavy metal arsenic by plants, thereby reducing the arsenic content in the soil while ensuring the economic benefits of the farmland. The planting technique is simple, highly operable, and can effectively solve the problem of planting in arsenic-contaminated farmland.

The application discloses a preparation method and use method of a composite soil conditioner and application thereof, relates to the technical field of soil remediation, and can improve soil structure, improve the composition of organic matter in soil, increase the Eh value of the rhizosphere soil of crops, increase the biomass of crops, and significantly reduce the biological availability and toxicity of arsenic and the arsenic content absorbed and accumulated by crops in edible parts of stems and leaves by multiple effects such as in-situ passivation of soil, formation of iron-arsenic precipitation, and formation of iron film / titanium film, so that arsenic is intercepted in inedible root parts.

The invention discloses an anaerobic methane oxidation mineral regeneration coupling treatment method suitable for low-concentration arsenic pollution, and relates to the technical field of environmental engineering and microorganisms. The method comprises the following components: S1, a layered reaction system construction and flora domestication preparation step, S2, a low-concentration arsenic reduction reaction step in a methane oxidation zone, S3, an As (III) fixation and stirring regulation step in a mineral generation zone, S4, a solid-liquid separation optimization step in a precipitation separation zone, and S5, a methane gas recycling and efficiency optimization step. The treatment efficiency and effect of low-concentration arsenic pollution are remarkably improved by designing a layered reaction system and combining the measures of flora domestication, dynamic regulation and control of the methane addition amount, accurate calculation of the Fe3 addition amount, optimization of the mineral generation rate and the like.

The invention relates to modified diatomite for repairing arsenic pollution of water and soil as well as a preparation method and application of the modified diatomite. The modified diatomite comprises diatomite as well as granular iron oxide and granular magnesium oxide which are loaded on the surface of the diatomite. According to the modified diatomite disclosed by the invention, the diatomite is subjected to composite modification by utilizing a hydrothermal method and an iron-magnesium compound, the modified diatomite is large in specific surface area, rough in surface and relatively strong in granular sensation, the fixing performance and the adsorption capacity on As (V) and As (III) are remarkably enhanced, and compared with single iron modification or magnesium modification or other metal modification, the modified diatomite has the advantages that the adsorption capacity is greatly improved; the effect of repairing arsenic-polluted water and arsenic-polluted soil is better when being applied to repairing arsenic-polluted water and arsenic-polluted soil. The preparation method of the modified diatomite is simple, high in operability and high in application adaptability; meanwhile, raw material sources are wide, and adaptability is wide.

The application belongs to the technical field of microorganisms, discloses a strain of Desmodesmus arsenicoxydans with arsenic oxidation function and application thereof in soil remediation, and specifically discloses a strain of Desmodesmus arsenicoxydans B3. The application separates a strain of microalgae B3 with arsenic oxidation function, the strain belongs to the genus Desmodesmus and can oxidize As(III) under day-night alternation conditions. Arsenic forms in a flooded soil solution are determined by using a liquid chromatography-atomic fluorescence spectrometer. Arsenic form analysis shows that As(III) is oxidized into As(V), the concentration of As(III) and total arsenic in soil pore water is reduced, which indicates that the Desmodesmus arsenicoxydans B3 can effectively oxidize As(III) and remove total arsenic in the soil solution under the condition of flooding, reduce the biological availability of arsenic, and play an important role in remediation of arsenic contaminated soil.

The application discloses a method for passivating arsenic pollution of tailings by modified biochar loaded nano zero-valent iron, and the method comprises the following steps: collecting wide-frequency electrochemical impedance spectrum data and passivation layer thickness data in real time through an integrated micro three-electrode system, establishing an initial passivation layer resistance value benchmark, and extracting current passivation layer resistance value and capacitance value in real time to calculate characteristic resonance frequency and minimum breakdown voltage; when the current passivation layer resistance value exceeds the preset multiple of the benchmark value, the fluctuation amplitude of the characteristic resonance frequency is less than a preset fluctuation threshold value, and the passivation layer thickness is in a preset interval, a sinusoidal alternating voltage is applied at the characteristic resonance frequency, a conductive channel is formed in the passivation layer by dielectric breakdown, and then the channel is stabilized by a direct-current reduction pulse, so that in-situ activation of the passivation layer and periodic recovery of material activity are realized.

The invention relates to a method for removing ethyl xanthate and arsenic in a water body through sulfur chemical fiber iron ore, and belongs to the technical field of environmental pollution treatment. According to the method, the S / Fe molar ratio of sulfur chemical fiber iron ore is regulated and controlled, and reactive oxygen species (ROS) generation and electron transfer mechanisms are combined, so that efficient degradation of ethyl xanthate and fixation of arsenic are realized. The preparation method of the sulfur chemical fiber iron ore comprises the steps of synthesis of lepidocrocite, vulcanization reaction, post-treatment and the like. When pollutants are removed, the sulfur chemical fiber iron ore is dispersed in an aqueous solution containing ethyl xanthate and / or arsenic, and the pollutants are removed through active oxygen oxidation, electrochemical oxidation, adsorption and coprecipitation, surface oxidation and other ways. The method has the advantages of environment friendliness, resource utilization, low cost, high adaptability and the like, and is suitable for treating mine wastewater, beneficiation wastewater and arsenic-polluted water.

The application discloses a soil arsenic pollution dynamic evolution prediction method based on time sequence deep learning, and relates to the technical field of soil pollution. The method comprises information acquisition: obtaining soil information of a region to be predicted to obtain basic soil information. The application establishes a reference based on previous soil arsenic pollution by setting a reference establishment method, and obtains change information by using a control variable method to explore the changes of different arsenic forms under different conditions. The application completes dynamic evolution prediction of soil arsenic in target region information by using the reference directory and the change information as a benchmark for information matching through a pollution evolution method. The application obtains the final pollution condition by considering emergencies according to actual use requirements and reflecting the emergencies in the basic pollution condition through a redundancy adding method after optimization, and the whole purpose is to predict the arsenic condition in the soil at a future time by using historical observation data and external variables, and to provide a basis for risk early warning, management strategy evaluation and monitoring plan optimization.

This invention discloses a method for the simultaneous remediation of pesticide and arsenic pollution in acidic soil, belonging to the field of soil remediation technology. *Pseudomonas arsenicoxydans* Y24-2 is used as the remediation microbial agent, and calcium peroxide is used as remediation agent A. Sodium acetate, urea, potassium dihydrogen phosphate, manganese salt, and ferrous salt are mixed to obtain remediation agent B. Remediation agents A and B must be stored separately and mixed immediately before remediation. Remediation agents A and B are dispersed in water, and the remediation microbial agent is added to obtain a remediation agent suspension. The remediation agent suspension is immediately applied to the acidic soil to be remediated for simultaneous remediation of pesticide and arsenic pollution. According to experiments, after remediation using the method provided by this invention, glyphosate in the soil is effectively degraded, arsenic is effectively oxidized and passivated, and the soil pH value is raised to neutral, achieving the goal of pollutant removal and soil restoration to health.

A method for producing a catalyst comprising a group VIB metal and / or a group VIII metal and an oxide support, characterized in that said method comprises recycling the group VIB and / or group VIII metals from a source catalyst containing a metal shared with the catalyst to be produced, said source catalyst being contaminated with coke, vanadium and arsenic, the method comprising: - a regeneration, then - extracting the vanadium with an extraction solution containing an alcohol, then - extracting the group VIB and / or group VIII metal or metals with an extraction solution comprising an organic compound having complexing properties, then - impregnating the support with an impregnation solution obtained from the solution of extracted group VIII and / or group VIB metal / metals, the extracted metal(s) remaining in the liquid phase from the extraction with an extraction solution containing an alcohol until the impregnation.

The invention discloses a preparation method of hydroxyl-containing titanium carbide MXene, electrochemical etching and light induction are adopted in the preparation method, the preparation method is simple and environmentally friendly, and the hydroxyl-containing titanium carbide MXene prepared through the preparation method is good in dispersity in water and has good catalytic oxidation activity and excellent adsorption capacity. The hydroxyl-containing titanium carbide MXene provided by the invention can be used as a photocatalyst for removing arsenic pollutants in water.

The invention provides a breeding method for polymerizing low-arsenic accumulation stable genetic loci of wheat grains, relates to the technical field of crop genetic breeding, and aims to solve the food safety problem caused by arsenic accumulation of wheat grains in arsenic-polluted areas. The method is based on six stable genetic loci for controlling low-arsenic accumulation of wheat grains, and parent selection, hybridization and multi-generation screening are carried out in stages through a KASP molecular marker-assisted selection technology: individuals carrying at least one target locus dominant haplotype are screened in early generation; in the middle generation, two or more dominant haplotypes are aggregated, and phenotype verification is combined; the homozygous degree and genetic stability of sites are identified in an advanced generation, and finally a homozygous strain with low arsenic accumulation of grains and excellent agronomic characters is obtained through multi-environment verification. According to the method, accurate directional improvement of the low-arsenic accumulation character is realized, the breeding efficiency is improved, the hereditary stability and environmental adaptability of the character are ensured, and an effective technical scheme is provided for safe production of wheat in an arsenic-polluted area.

The invention relates to a composition for treating trivalent arsenic pollution and a preparation method and application thereof. The composition for treating trivalent arsenic pollution comprises an active oxidation agent, an embedding agent and a function enhancer, the mass ratio of the active oxidation agent to the embedding medium to the function enhancer is (20-50): (50-100): (1-5); the active oxidizing agent comprises an activating agent and an oxidizing agent, and the activating agent is iron-containing industrial solid waste; the oxidant is sulfite; the embedding agent comprises acidic kaolin and silica sol; the function enhancer is at least one of citric acid, tartaric acid or oxalic acid. According to the invention, industrial solid waste steel slag and sodium hydrogen sulfite are adopted to construct an efficient oxidation agent system for trivalent arsenic; by means of solid-liquid permeation and gel integration and electrostatic and hydrogen-bond interaction, the oxidation efficiency of a medicament system is remarkably improved, and conversion from trivalent arsenic to low-toxicity pentavalent arsenic is accelerated.

The application discloses a paper-based arsenic ion synthetic biosensor based on a cell-free system and application thereof, and comprises a cell-free arsenic ion sensing module and a semi-quantitative paper-based detection chip. The cell-free arsenic ion sensing module is composed of a synthetic arsenate reduction module, an arsenic ion specificity sensing module, a high-gain transcription amplification module and a visual reporting module connected in sequence. The synthetic arsenate reduction module converts pentavalent arsenic into trivalent arsenic; the arsenic ion specificity sensing module recognizes trivalent arsenic and removes transcription inhibition; the high-gain transcription amplification module amplifies the signal through ecf11 cascade; and the visual reporting module outputs a colorimetric or fluorescent signal. The application integrates an engineered promoter and an ecf11 cascade amplification system in a cell-free system, greatly improves sensitivity and dynamic range and keeps low leakage. The paper-based chip can present different pattern arrangements according to arsenic concentration and is easy to read. The application provides an environmentally friendly, portable and easy-to-read innovative method for monitoring arsenic pollution in drinking water.

The invention discloses an application of two ciliate desert-grass AsIII reverse transport proteins in improving the arsenic hyperaccumulation capability of plants. The application is as follows. According to the invention, the PvACR3 of a cell membrane and the PvACR3 positioned in a vacuolar membrane are simultaneously subjected to heterologous overexpression in a plant through a hybridization technology; 1, the biomass of the plant is obviously improved, the hyperaccumulation capability of the plant on arsenic is enhanced, and the absorption and transport efficiency of the plant on arsenic is promoted; the invention provides an efficient, environment-friendly and low-cost new technical choice for the bioremediation technology of the arsenic-polluted soil.

The invention discloses bacillus cereus CMJ-As01, a microbial agent and application of the bacillus cereus CMJ-As01 in microbial remediation of an arsenic-polluted soil-rice system, and belongs to the technical field of soil remediation. The bacillus cereus CMJ-As01 has good arsenic tolerance, and when the bacillus cereus CMJ-As01 is applied to the rhizosphere soil of the arsenic-polluted rice field, the abundance of beneficial microbial communities and key functional genes in the rhizosphere soil can be increased, and the key enzyme activity in the rhizosphere soil is improved, so that the formation of rhizosphere iron films is promoted to achieve the purpose of arsenic resistance, further the arsenic content in brown rice is effectively reduced, and the yield of the rice field is improved. The microbial remediation of the arsenic-polluted soil-rice system is completed, so that rice is planted in the medium-light arsenic-polluted farmland, agricultural products with the arsenic content reaching the standard are obtained, and remediation of soil arsenic pollution is achieved.

The invention provides an arsenic pollution remediation method based on piezoelectric catalysis in-situ self-Fenton reaction, which is characterized by specifically comprising the following steps: step 1, under the ultrasonic action, adding a certain amount of material with piezoelectric effect into arsenic-containing wastewater, and then adding a certain amount of the material with piezoelectric effect into the arsenic-containing wastewater; stirring for a period of time to perform oxidation-reduction reaction of oxygen and water to generate hydrogen peroxide H2O2; 2, in the ultrasonic action process, continuously reacting for a period of time, and keeping a certain temperature; step 3, continuing the ultrasonic action, generating charges on the surface of the material with the piezoelectric effect, forming the piezoelectric effect, and decomposing the hydrogen peroxide to generate a hydroxyl free radical. OH; 4, the hydroxyl free radicals. OH and arsenic As in the arsenic-containing wastewater are subjected to an oxidation-reduction reaction, and As (III) in the wastewater is converted into As (V); and 5, removing As (V) from the wastewater to realize the remediation of arsenic pollution in the wastewater.

This application discloses a method for passivating arsenic contamination in tailings using modified biochar-supported nano-zero-valent iron. The method includes: real-time acquisition of broadband electrochemical impedance spectroscopy data and passivation layer thickness data through an integrated micro three-electrode system to establish an initial passivation layer resistance value benchmark, and real-time extraction of the current passivation layer resistance and capacitance values ​​to calculate the characteristic resonant frequency and minimum breakdown voltage; when the current passivation layer resistance exceeds a preset multiple of the benchmark value, the fluctuation amplitude of the characteristic resonant frequency is less than a preset fluctuation threshold, and the passivation layer thickness is within a preset range, a sinusoidal AC voltage is applied at the characteristic resonant frequency to form a conductive channel in the passivation layer through dielectric breakdown, and then the channel is stabilized by a DC reduction pulse to achieve in-situ activation of the passivation layer and periodic recovery of material activity.

The invention discloses a regulation and control system and method for synergistic treatment of arsenic pollution and greenhouse gas in a rice field, and relates to the technical field of agricultural soil remediation. The regulation and control system for cooperative treatment of arsenic pollution and greenhouse gas in the rice field comprises a rice field information acquisition module, a material storage, supply and broadcasting module, a liquid storage and drip irrigation module, an equipment intelligent control module and a cooperative control auxiliary module, wherein the rice field information acquisition module is used for acquiring information and transmitting the information to the equipment intelligent control module; the material storing, supplying and broadcasting module is used for storing and broadcasting materials; the liquid storage drip irrigation module is used for mixing the solution and conveying the mixed solution to the rice field; the equipment intelligent control module is used for constructing a control scheme; according to the rice field arsenic pollution and greenhouse gas cooperative control system, mineral materials are adopted for soil treatment, so that the soil environment is improved, the growth and nutritional requirements of rice are guaranteed, and the yield is increased while food safety is guaranteed.

The invention discloses a strain of pseudomonas morpha and application of the strain of pseudomonas morpha. Belongs to the technical field of agricultural microorganism and heavy metal pollution control. The strain PMZ1 disclosed by the invention is a strain of Pseudomonas mosseelii, is separated from rhizosphere of rice, and has higher safety when being applied to in-situ removal of cadmium and arsenic pollution in the rice. Compared with existing reports, the strain has the advantages that the capability of reducing cadmium and arsenic in rice is remarkably improved, synchronous reduction of cadmium and arsenic can be realized, and the strain also has certain growth promoting potential. By applying the strain, the rice in the medium-light cadmium-arsenic combined polluted soil can be repaired while being produced.

The application discloses application of a rice HDT701 gene in cultivating plant arsenic stress high tolerance or high sensitivity varieties, and belongs to the technical field of genetic engineering. The nucleotide sequence of the HDT701 gene is shown in SEQ ID NO. 1, or is completely complementary to the sequence shown in SEQ ID NO. 1, or is a nucleotide sequence for coding the amino acid sequence shown in SEQ ID NO. 2. The application can improve the ability of plants to resist arsenic stress by reducing the expression of HDT701, or can improve the sensitivity of plants to arsenic stress by increasing the expression of HDT701, and can be applied to plant genetic engineering breeding, and provides a new method for creating or improving new germplasm of plants resisting arsenic stress or indicating plants in arsenic pollution.