58 results about "Arsenic pollution" patented technology

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 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 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 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 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.

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 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 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.

The invention discloses a cadmium and arsenic polluted rice field modified charcoal synergistic passivation grading restoration method, which comprises the following steps: collecting multi-source heterogeneous environment data of a rice field area, constructing a coupling feature vector, inputting the coupling feature vector into a pre-constructed risk assessment model, calculating a composite risk probability of a grid unit, and calculating the composite risk probability of the grid unit; the rice field area is divided into risk management and control subareas of different grades according to the risk management and control subareas; differentially putting a modified charcoal material with matched functions, wherein the modified charcoal material comprises composite load type charcoal aiming at a high-risk area; in the key growth period of the rice, the rhizosphere microenvironment state is monitored in real time, and a land block self-adaptive target regulation and control feasible region boundary is constructed based on the coupling feature vector; and executing a multivariable cooperative regulation strategy, and maintaining the rhizosphere microenvironment state in a safety domain for inhibiting cadmium and arsenic activation. According to the method, the problem of restoration failure caused by regional Eh-pH decoupling and fissure water disturbance is effectively solved, and cadmium and arsenic synchronous long-acting treatment is achieved.

The present application relates to the technical field of soil remediation, and discloses a risk reduction method for environmental arsenic pollution, which comprises the following steps: preparing a culture medium, culturing a nitrogen-fixing microbial flora in an antibiotic-resistant manner, co-culturing the nitrogen-fixing microbial flora and arsenic-polluted soil, and analyzing the influence of soil arsenic conversion efficiency, so that the arsenic content in the soil is significantly reduced, the arsenic resistance of the nitrogen-fixing microbial flora reaches 500 mg / kg, the harm of soil arsenate is reduced, the safe management and control of arsenic-polluted soil can be realized, the nitrogen-fixing microbial flora can significantly reduce the content of trivalent arsenic in the soil, the trivalent arsenic with strong toxicity in the soil is more converted into pentavalent arsenic with weak toxicity, the conversion efficiency can reach more than 94.36%, and the risk reduction method for environmental arsenic pollution is successfully constructed, which has strong functionality and good popularization.

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: - a regeneration, then - an extraction of the vanadium by an extraction solution comprising an alcohol, 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 an extraction solution comprising an alcohol until the impregnation.

The application discloses a method for removing arsenic from a copper sulfate solution, which comprises an oxidation and arsenic removal step, and specifically comprises the following steps: adding an arsenic-containing copper sulfate solution to be treated into an oxidizing agent to obtain material a through stirring reaction; adding an arsenic removal agent into the material a, adding a pH regulator to adjust the pH value of the solution to 3.5-4.5 to perform an arsenic removal reaction, and performing solid-liquid separation after the reaction to obtain arsenate precipitate and copper sulfate solution after arsenic removal; and the arsenic removal agent is iron sulfate. The application can guarantee product quality, optimize the process, reduce copper loss, protect stable operation of equipment, reduce comprehensive cost, eliminate arsenic pollution and compliance risks, and promote green and high-quality development of the copper smelting and deep processing industry.

The present invention relates to a Raman spectroscopic analysis method for analyzing trivalent and pentavalent arsenic contamination in soil at the site, and more specifically, to a Raman spectroscopic measurement and analysis method capable of determining trivalent and pentavalent arsenic solely by the ratio of Raman signals in the 300–400 cm-1 band and signals in the 730–830 cm-1 band. According to the present invention, measurement and analysis for detecting trivalent and pentavalent arsenic contamination can be performed by placing several band filters in parallel in front of a photodetector without using an expensive spectrometer for Raman spectroscopy at the site.

The application discloses a strain of arsenic enrichment and arsenic oxidation tetraselmis suecica A2, which can enrich arsenic and oxidize As(III). The tetraselmis suecica A2 can oxidize As(III) into As(V), and the cell surface adsorption capacity of the tetraselmis suecica A2 to arsenic is also very strong. The tetraselmis suecica A2 can be used for treating arsenic contaminated soil, reducing the toxic effect of arsenic in the soil, and especially applied to oxidation of As(III) in the arsenic contaminated soil under the condition of flooding.

The application discloses a Pseudomonas molinii strain and application thereof, and belongs to the technical field of agricultural microorganisms and heavy metal pollution prevention and control. Pseudomonas mosselii The strain PMZ1 is a Pseudomonas molinii strain isolated from the rhizosphere of rice and has higher safety when applied to in-situ removal of cadmium and arsenic pollution in the rice. Compared with the existing reports, the strain has a significant improvement in the ability of reducing cadmium and arsenic in the rice, can realize synchronous reduction of cadmium and arsenic, and has a certain growth promotion potential. The strain can be applied to realize production and repair of the rice in the soil with medium and light cadmium and arsenic composite pollution.

This invention discloses a method and its application for regulating the oxidation and arsenic speciation transformation of arsenopyrite. The method involves sequentially adding arsenopyrite and pyrrhotite to an acidic, iron-free medium with an initial pH of 2.0 to form a protective galvanic cell coupling, followed by inoculation with *Thiobacillus ferrooxidans* and a shaking reaction. By adjusting the ratio of arsenopyrite to pyrrhotite and the addition of *Thiobacillus ferrooxidans*, the method achieves precise regulation of the oxidation of arsenopyrite and the arsenic speciation transformation through phased changes in arsenic release behavior and the As(III) / As(V) ratio. This method possesses dual application value in resource utilization and environmental remediation, and can be applied to the optimization of pretreatment processes for the biological oxidation of gold-bearing arsenic ores or the control of arsenic pollution migration and transformation in acidic mine wastewater, tailings heap leaching, and arsenic-containing sulfide ore coexisting scenarios.

The application discloses an arsenic pollution in-situ remediation method based on a Nitzschia palea-Vallisneria natans symbiotic system and belongs to the technical field of pollution prevention and control. The remediation method takes Nitzschia palea as a functional algae species, and a stable attached symbiotic system is constructed with Vallisneria natans to realize in-situ remediation of arsenic pollution. In the application, Nitzschia palea is specifically attached to the surface of the rhizome of Vallisneria natans by virtue of a siliceous cell wall, and the absorption and enrichment of arsenic by Vallisneria natans are significantly strengthened through interface binding site amplification, rhizosphere arsenic form activation, physiological stress resistance protection and other effects; under the stress of 100 mu g / L arsenic, the arsenic enrichment stability of Vallisneria natans is improved by 15.29% compared to single Vallisneria natans, and the arsenic concentration in water can be efficiently reduced.

This invention proposes a passivation remediation agent for arsenic-contaminated soil and its application. The passivation remediation agent constructs a ternary synergistic remediation system of zero-valent iron, phosphate, and dithiocarbamate through multi-component synergistic action, mainly including four core mechanisms: redox-adsorption-precipitation-chelation. Simultaneously, biochar, as a carrier, can reduce the risk of zero-valent iron agglomeration and deactivation, maintaining its high reactivity and significantly improving arsenic fixation efficiency. The introduction of dithiocarbamate can fill the gap in the insufficient fixation capacity of traditional iron-based materials for As(III). The calcium phosphate and magnesium phosphate used in this invention hydrolyze in the soil, adjusting the soil pH to a neutral or slightly alkaline range, reducing the solubility of arsenic. The positively charged surface of the iron oxide further facilitates the fixation of negatively charged AsO4. 3‑ Adsorption occurs. Furthermore, the alkaline properties of biochar further enhance this effect.

The invention provides a device for treating arsenic pollutants in beneficiation wastewater and a preparation method of an adsorbent of the device. The device for treating the arsenic pollutants in the beneficiation wastewater comprises a base; the reaction box is fixed on the base, and the reaction box is used for accommodating the beneficiation wastewater and adding an adsorbent, so that the beneficiation wastewater and the adsorbent are subjected to adsorption reaction. According to the device for treating the arsenic pollutants in the beneficiation wastewater and the preparation method of the adsorbent of the device, the adsorbent is put into the beneficiation wastewater for adsorption reaction, so that the device is suitable for beneficiation wastewater with different concentrations and complexities, the arsenic content in the beneficiation wastewater can be effectively reduced to be below the discharge standard, and the environmental safety is guaranteed; through stirring operation in an initial state, full contact of the wastewater and the adsorbent is ensured; and through the first extension of the pushing assembly, the filter plate can move forwards to the bottom of the discharging groove, so that the device is switched from a stirring state to a solid-liquid separation state, and the adsorbent is convenient to recycle.

The application discloses a bacillus cereus CMJ-As01, a microbial agent and application of the bacillus cereus CMJ-As01 and the microbial agent in microbial remediation of an arsenic-polluted soil-rice system, and belongs to the technical field of soil remediation. Bacillus cereus The bacillus cereus CMJ-As01 has good arsenic tolerance, and when applied to rhizosphere soil of an arsenic-polluted paddy field, can increase the abundance of beneficial bacteria groups and key functional genes in the rhizosphere soil, improve the activity of key enzymes in the rhizosphere soil, promote the formation of an iron membrane in the rhizosphere, achieve the purpose of blocking arsenic, effectively reduce the arsenic content in rice, complete microbial remediation of the arsenic-polluted soil-rice system, and realize planting of rice in a medium or light arsenic-polluted farmland, obtainment of agricultural products with qualified arsenic content, and remediation of soil arsenic pollution.