30 results about "Cyanide level" patented technology

Hydrolyzed nitrilotriacetonitrile compositions are disclosed prepared by a method characterized by a one-shot addition of an amount of nitrilotriacetonitrile to a solution containing an acid catalyst, where the reaction is complete in a time period of less than an hour. The method is also characterized by adjusting the pH of the reaction mixture to a pH of at least 8. The method is also characterized by oxidatively removing free cyanide to a desired low level through the addition of an oxidizing agent the produces environmentally benign by-products to the crude hydrolyzed NTAN to form hydrolyzed NTAN compositions having minimized, negligible, or substantially no free cyanide levels.

The invention relates to an apparatus and method for measuring the content of cyanide, the said apparatus comprises front treating apparatus and color measuring apparatus, wherein front treating apparatus includes peristaltic pump, automatic sampling device and online heating module which are connected with peristaltic pump; the said online heating module connects with online distilling module and six relaxing valve of coloring and measuring apparatus, wherein online distilling module is connected with sodium hydroxide absorbing liquid container linked with peristaltic pump; the said three relaxing pipe is connected with pipe with distilling regent solution. The method includes preparing miscellaneous needed solution and color measuring in the medium of pH3-4; distilling cyanides as hydrogen cyanides by online distilling; separating other disturbance by gas permeable membrane; inputting regent solution into hydrogen cyanic acid; doing colorimetric measuring by optical fiber spectrometer at wavelength of 580nm.

The invention discloses a method for detecting free and bound trace cyanide and belongs to the technical field of analysis and detection. The method is mainly used for beverage wine and its raw material analysis. The method utilizes a specific pretreatment and derivatization device to respectively treat the free or bound cyanide samples. Aiming at a free cyanide, the hydrocyanic acid is released and the cyanide group is directly derived. Aiming at the bound cyanide, the bound cyanide is converted into free hydrocyanic acid and the free hydrocyanic acid is derived through a derivatization reagent. The derivative is subjected to qualitative and quantitative analysis based on the liquid chromatography-mass spectrometry combined technology. A standard curve is built by an internal standard method. The contents of the free and bound cyanides are respectively calculated. The detection method has a detection limit of 0.01 micrograms per liter, a quantification limit of 0.05 micrograms per liter, a linear correlation coefficient of more than 0.99, an adding standard recovery rate of 93.8% to 106% and relative standard deviation of less than 10%. The method has the advantages of high detection sensitivity, short time and small interference, and can meet the requirements on free and bound cyanide determination.

The invention relates to a gas chromatography-serial four-rod mass spectrometric detection method for detecting the content of cyanide in milk and milk powder. A sample is placed under an alkaline condition; octadecyl trimethyl ammonium bromide is taken as a phase transfer catalyst; Pentafluorobenzyl Bromide (PFB-Br) is taken as a derivation reagent; the cyanide ion (CN-) is derived into a volatile derivative product Pentafluorobenzyl Bromide (PFB-Br); and gas chromatography-serial four-rod mass spectrometric (GC-MS / MS) detection is adopted and a standard curve method is adopted for quantifying, thereby acquiring the content of cyanide in the sample. The method provided by the invention is adopted for detecting the content of cyanide in milk and milk powder and has the advantages of simple and convenient operation and high sensitivity.

A device and a method of analyzing total cyanide in water samples, including a mixing tube, a stripping tube, a sampling pipe, a reaction pipe, a peristaltic pump, an air pump, a UV digester, a heater, a condenser, a drain pipe and a water sample detector. The mixing tube, the stripping tube, the sampling pipe and the reaction pipe are respectively connected to the peristaltic pump. The mixing tube is connected to the reaction pipe. A bottom of the stripping tube, the air pump, the UV digester, the heater and the condenser and are sequentially connected. The condenser is connected to the mixing tube. An upper portion of the stripping tube, the sampling pipe and the reaction pipe are connected to the drain pipe. An absorbance of the water in the mixing tube is measured by the sample detector, and used to calculate the total cyanide content by spectrophotometry.

The invention belongs to the technical field of gold product detection and particularly discloses a method for determining the cyanide content in an electroformed gold product by gas chromatography. The method comprises steps of 1) weighing the electroformed gold product as a test sample, and dissolving the test sample by using mixed reagent of hydrogen peroxide, sodium chloride and oxalic acid; 2) distilling out hydrogen cyanide through disodium ethylene diamine tetraacetate, tartaric acid and trichloroacetic acid under a boiling condition, and absorbing with sodium hydroxide solution to obtain cyanide aqueous solution for detection; and 3) adding 10mL of the sample into a headspace sample injection bottle containing phosphoric acid and chloramine T, determining the concentration of cyanide by headspace gas chromatography, and calculating the content of cyanide in the to-be-determined solution by calibrating a working curve. The method is advantaged in that the method can be used foraccurately measuring the content of cyanide in the electroformed gold product, fills up the technical blank that the cyanide in the product cannot be measured, and is convenient and quick in detectionprocess, accurate in detection result and good in consistency.

The invention relates to a flotation pretreatment method for pyrite in cyanogen-containing and sulfur-containing tailings. Cyanide influencing sulfur flotation is separated from minerals through a washing method, and the effect of flotation of the pyrite in cyanogen-containing tailings is improved; and meanwhile, lead-zinc bulk flotation operation can be conducted in combination with the lead-zinc content condition of the tailings, and lead and zinc in the cyanogen-containing tailings are recycled. Flotation is conducted after pretreatment, when the sulfur grade of the cyanide-containing tailings is 20% or above, the sulfur grade of concentrate can be stabilized to be 45% or above, the sulfur grade of the tailings can reach 3% or below, the cyanide content of the flotation tailings is lower than 1000 mg / Kg, and the total toxic leaching cyanide content is lower than 5 mg / L. The flotation pretreatment method has the advantages that the consumption of an oxidizing agent is reduced, and the decyanation flotation effect of the cyanidation tailings is improved.

The invention belongs to the field of food analysis, and provides a rapid detection method of cyanide in sorghum. The method comprises the following steps of: directly adding a crushed sample into a headspace sample introduction bottle; ultrasonically extracting cyanide in sorghum by using ultrapure water; performing still standing in an ice-water bath for 5 minutes; adding a phosphate buffer solution and chloramine T under the condition of the ice-water bath, immediately performing covering and uniformly mixing; performing detection through gas chromatography-headspace chromatography, adopting a sample injection mode with the split ratio being 50: 1; performing quantification through using a standard curve method; and finally, calculating the content of the cyanide in the sorghum. According to the method, a chromatographic column used for gas chromatography-headspace chromatography detection is an HP-5 chromatographic column, and the specification of the chromatographic column is 30 m*0.32 mm*0.25 mu m; and a detection result shows that R2 is equal to 0.999, the recovery rate is 89.5%-108.9%, the precision RSD is equal to 3.182%, and the detection limit is 3 [mu] g / L. The detection method has the advantages of good reproducibility, high precision and high sensitivity, and is suitable for detecting cyanide in sorghum.

The invention discloses a method for repairing cyanide-polluted soil and underground water through in-situ leaching-ventilation enhanced microorganisms. According to the method, for medium-high-concentration in-situ cyanide polluted soil and underground water, soluble cyanide in the soil is transferred to a liquid phase in an injection-extraction well alkali liquor leaching mode, and the soluble cyanide is treated and treated by ground wastewater integrated equipment and reaches the standard for recycling; pH values in the soil and the underground water are adjusted back, and ventilation is performed to maintain the oxygen content; and cyanide in the soil and the underground water is degraded by adopting cyanide degrading bacteria, so that the content of cyanide in the soil reaches the first-class land use screening value standard in Soil Pollution Risk Screening Standard for Soil Environmental Quality Construction (Trial) (GB36600-2018), and the content of cyanide in the underground water reaches the III-class standard of Quality Standard for Underground Water (GB / T14848-2017).

The invention discloses a device and a method for full-automatically measuring cyanide in water, and relates to the technical field of water quality detection. The current standard HJ 484-2009 is adopted, and the method is a method for analyzing and measuring cyanide in surface water, domestic sewage and industrial wastewater. The device can realize automatic distillation, automatic reagent addition, arbitrary setting of reaction time, automatic transfer, automatic measurement on a spectrophotometer, automatic discharge and cleaning, automatic calculation of cyanide content in water and formation of a test report, and the whole measurement process is fully automatic. In addition, according to the automatic measuring method, the harm of harmful reagents to human bodies is avoided, the labor intensity is reduced, the error of manual operation is reduced, the measurement precision is improved, and the practicability is high.

The invention discloses a method for cleaning cyanide in gold ore tailings, which comprises the following steps: 1. mixing powdery Na2S2O5, powdery CuSO4 and gold ore tailing slurry with the pH valueof 9-11 to obtain mixed slurry; 2, carrying out an oxidation reaction on the mixed slurry under an aeration condition to obtain reacted slurry; 3, adjusting the pH value, and adding hydrogen peroxideto obtain hydrogen peroxide-containing slurry; 4, carrying out an oxidation reaction on the hydrogen peroxide-containing slurry for 1-8h under an aeration condition to obtain reacted slurry; and fifthly, the pH is adjusted, filtering is conducted, and the gold ore tailings obtained after cleaning treatment are obtained. According to the method, powdery Na2S2O5, powdery CuSO4 and hydrogen peroxideare used as raw material reagents, cyanide in the gold ore tailings is removed through a two-step oxidation reaction under the inflation condition, the content of cyanide in the treated gold ore tailings leachate can be reduced to 0.05 mg / L, and the technical specification requirements of gold ore tailings backfilling are fully met.

The invention relates to a pyrolysis harmless treatment method for thiocyanation-containing leaching tailings, which comprises the following steps: adding a thiocyanation-containing leaching tailings filter cake obtained by filter pressing into a rotary kiln, heating, oxidizing and decomposing the thiocyanation-containing leaching tailings by utilizing the characteristic that a cyanogen-containing compound is easy to decompose at a high temperature, and driving materials in the rotary kiln to turn over when the rotary kiln rotates, and the self-crushing effect is achieved, and the oxidation reaction speed of cyanide is increased. By controlling the highest pyrolysis temperature and adjusting the pyrolysis atmosphere in the kiln, the concentration of oxygen and CO is controlled within a proper range, oxidation of sulfides in the tailings can be avoided, the content of SO2 in pyrolysis flue gas reaches the emission standard, the content of toxic leaching total cyanide in the treated tailings reaches the related standard of class I general solid waste, and the method is suitable for industrial production. And clean and efficient harmless treatment of the thiocyanation tailings is realized.

The invention discloses a method for determining cyanide and total cyanide in soil, and relates to the technical field of cyanide detection. The method comprises the steps that an extracting solution obtained after a soil sample is extracted through an alkaline solution, a Fe<3+> solution and a reducing agent are subjected to a chromogenic reaction in a colloidal solution, and the content of cyanide in the soil sample is determined. According to the method, the sample does not need to be subjected to distillation pretreatment, generation of HCN is avoided, the method is safe and reliable, large-batch detection can be carried out at the same time, the detection speed is high, the cost is low, and compared with traditional HJ 745-2015, the labor intensity and the analysis cost are greatly reduced, and the detection efficiency of the cyanide and the total cyanide in the soil is improved.

The invention discloses a method for rapidly detecting the content of cyanide in nuts, which belongs to the technical field of food analysis and detection. According to the method, a buffer salt system and the formula of an extracting agent and an adsorbent for QuEChERS pretreatment are optimized, spectrophotometric method detection is combined, reaction with chloramine T is carried out, CN<-> is converted into cyanogen chloride, then chromogenic reaction with isonicotinic acid-barbituric acid is carried out to generate the purple blue dye, absorbance is measured by using a spectrophotometer, and the cyanide content in the sample isquantitatively obtained by combining a standard curve method. The detection method established by the invention can realize low-sample-amount rapid batch sample pretreatment, has low requirements on instruments and equipment, can efficiently improve the detection efficiency, and has the advantages of rapidness, economy and wide applicability.

The invention discloses a method for rapidly detecting the content of cyanide in white spirit brewing raw materials or distiller's yeast, and belongs to the technical field of white spirit analysis and detection. The method comprises the following steps: treating a white spirit brewing raw material or a distiller's yeast sample by adopting a QuEChERS technology, adding acetonitrile, carrying out ultrasonic treatment, adding ceramic homogeneous protons, MgSO4 and NaOAc, uniformly mixing, and carrying out centrifugal treatment; adding MgSO4, octadecylsilane chemically bonded silica C18 and graphitized carbon black GCB into the supernate, and performing centrifugal treatment after uniform mixing; finally, obtaining a white spirit brewing raw material or distiller's yeast sample subjected to QuEChERS pretreatment, and carrying out cyanide content detection by an isonicotinic acid-barbituric acid spectrophotometric method, so that the requirement on instruments and equipment is low, and rapid monitoring of wide popularization to actual production is easier to realize; and samples can be pretreated in batches, the operation is simple, and the detection efficiency can be efficiently improved. The detection method has the advantages of rapidness, economy, wide applicability and the like.

The invention discloses a method for removing iron and cyanide by mixing copper-containing wastewater and cyanide-containing wastewater, which specifically includes the following steps: mixing copper-containing acid wastewater and cyanide-containing wastewater, and adding an appropriate amount of ferrous sulfate; Polyacrylamide is added to carry out flocculation and sedimentation, the supernatant is adsorbed with resin, underflow filtration, and the filter residue is washed; S3, add dilute sulfuric acid to the filter residue and inflate, add potassium ferrocyanide and the surfactant zinc naphthalate to the solution after dissolution, Generate china blue dye; S4, for the filtrate, use resin to absorb copper and resin to absorb zinc, and use sulfuric acid solution to desorb copper and zinc respectively; S5, for the liquid after adsorption, adjust its pH to 6-7, pass chlorine dioxide The remaining total cyanide content was reduced to 0.5 mg / L before efflux. The method of the invention has low cost, can produce products with sales value, and can effectively recover metal ions in copper-containing acid wastewater and remove cyanide in cyanide-containing wastewater.

The invention discloses a method for detecting the content of hydrogen cyanide and cyanide. According to the method, CV (Cyclic Voltammetry) for directly measuring the concentration of the cyanide ina sample is established; then, measuring is performed by using differential pulse voltammetry; the content of the hydrogen cyanide and the cyanide is detected in a three-electrode system which takes acomposite membrane-modified glassy carbon electrode as a working electrode, a platinum wire electrode as an auxiliary electrode and a saturated calomel electrode as a reference electrode; the sampleis subjected to quantitative analysis by adopting a standard curve method to obtain a result. The method comprises the following steps: (1) preparing a sample; (2) preparing a standard solution; (3) detecting. The method is easy to operate, high in accuracy, high in sensitivity and high in specificity.

A device and a method of analyzing total cyanide in water samples, including a mixing tube, a stripping tube, a sampling pipe, a reaction pipe, a peristaltic pump, an air pump, a UV digester, a heater, a condenser, a drain pipe and a water sample detector. The mixing tube, the stripping tube, the sampling pipe and the reaction pipe are respectively connected to the peristaltic pump. The mixing tube is connected to the reaction pipe. A bottom of the stripping tube, the air pump, the UV digester, the heater and the condenser and are sequentially connected. The condenser is connected to the mixing tube. An upper portion of the stripping tube, the sampling pipe and the reaction pipe are connected to the drain pipe. An absorbance of the water in the mixing tube is measured by the sample detector, and used to calculate the total cyanide content by spectrophotometry.

The invention discloses a method for rapidly detecting the content of cyanide in baijiu brewing fermented grains, and belongs to the technical field of baijiu analysis and detection. The method comprises the following steps: carrying out QuEChERS pretreatment on a fermented grain sample under an alkaline buffer condition, carrying out a reaction with chloramine T, converting CN <-> into cyanogen chloride, carrying out a chromogenic reaction with isonicotinic acid-barbituric acid to generate a purple blue dye, and determining absorbance by using a spectrophotometer; and quantificationally obtaining the cyanide content in the sample by a standard curve method. The detection method established by the invention can realize low-sample-amount rapid batch sample pretreatment, is simple to operate, has low requirements on instruments and equipment, can efficiently improve the detection efficiency, and has the advantages of rapidness, economy and wide applicability.

The invention discloses a method for determining the content of cyanide in an electroforming process gold product by ion chromatography. The method comprises the following steps of 1) dissolving a test sample by selecting a mixed reagent of 0.1 to 10 percent nitric acid, sodium chloride and tartaric acid; 2) performing extracting and separating by selecting a mixed solvent of ethyl acetate, methylene chloride and isopropyl ether to obtain a cyanide aqueous solution; 3) distilling out hydrogen cyanide by using oxalic acid, tartaric acid and phthalic acid under the condition of boiling, performing absorbing by using 10 to 40 g / L sodium hydroxide solution to obtain sodium cyanide to be determined, and performing a blank test under the same conditions; and 4) selecting a mixed solution of sodium hydroxide, disodium edetate and ethylenediamine as a leacheate, establishing an ion chromatography test cyanide calibration work curve, and determining the content of the cyanide in the solution tobe determined. According to the method, the content of the cyanide in the electroforming process gold product can be determined accurately; the technical blank that the cyanide of the types of products cannot be determined is filled; a detection process is convenient and quick; a detection result is accurate; and the consistency is good.

The invention discloses a treatment method for cyanidation gold extraction wastewater. The silicon-based acid solution is prepared by using sodium silicate and hydrochloric acid solution; the cyanide gold extraction aluminum-containing wastewater is prepared by using aluminum chloride and cyanide gold extraction wastewater; Acid solution and cyanide gold-extracting aluminum-containing wastewater to prepare cyanide-extracted gold-containing silicon-aluminum acidic water; low-temperature plasma irradiation is carried out on cyanide-extracted gold-containing silicon-aluminum acidic water to obtain polysilicon-aluminum precursor solution; polysilicon-aluminum precursor solution The bulk solution is irradiated with low-temperature plasma to obtain a silicon-based flocculant. The waste water treatment process of the present invention is simple, and the sources of required raw materials are extensive. The minimum total cyanide content in the flocculant prepared by using cyanidation gold extraction waste water is only 0.04 mg / kg, and the flocculant prepared at the same time is applicable to water with pH=1-13 Environment, heavy metal removal rate is high, the highest can realize the removal of 99% lead, 98% mercury, 98% cadmium, 99% zinc, 99% copper in the simulated liquid, it is very important to solve the problems existing in the current cyanide gold extraction wastewater treatment process Especially critical.

The invention discloses a method for determining soil cyanide and total cyanide. The method comprises the following steps: regulating the pH value of a soil sample to be alkaline, preparing an impurity-free soil sample, and quantitatively weighing the soil sample; and distilling the soil sample, collecting distillate by using absorption liquid, and measuring by using a continuous flow analyzer toobtain the concentration of cyanide or total cyanide in the soil. The total cyanide content of the soil is determined by adopting the modes of soil sample distillation and continuous flow analyzer determination, interference can be eliminated, instruments are prevented from being damaged, detection personnel are safer, analysis equipment can be protected from being damaged, and meanwhile, the detection work is more efficient. Low-temperature drying, electrostatic adsorption, sieving and other treatment are adopted, a soil sample with more standardized characteristics can be obtained, the influence of metal impurities and organic impurities on a measurement result is avoided, soil is adjusted to be alkaline before drying, it is guaranteed that no cyanide overflows in the low-temperature drying process, and the precision and accuracy of the detection result are fully guaranteed.

The invention provides a method for evaluating the content of cyanide capable of being produced after tobacco combustion, and the method comprises the following steps: (1) detecting the content of water-soluble cyanide precursors in tobacco and recording the content as PCN microgram / g, and detecting the content of protein in tobacco and recording the content as P mg / g; (2) the cyanide release amount HCN microgram / g after tobacco combustion is obtained through calculation, the calculation formula is HCN = A + B * PCN-C * P, A, B and C are constants, the value range of A is 500-520, the value range of B is 2.7-2.8, and the value range of C is 5.3-5.5. The method is simple and feasible, the evaluation result is accurate, a new strategy is provided for evaluation of the cigarette smoke cyanide release amount, and the method has important significance for tobacco product quality control.

The invention discloses a method for measuring soil cyanide and total cyanide. The pH value of a soil sample is adjusted to be alkaline, a soil sample without impurities is prepared, and the soil sample is weighed quantitatively; It is used for continuous flow analyzer to determine the concentration of cyanide or total cyanide in soil. Using soil sample distillation and continuous flow analyzer to measure the total soil cyanide content can eliminate interference, avoid damage to the instrument, make it safer for the testing personnel, and help protect the analysis equipment from damage. At the same time, the testing work is more efficient. Using low-temperature drying, electrostatic adsorption, sieving, etc., can obtain more standardized soil samples, avoid the influence of metal impurities and organic impurities on the measurement results, and adjust the soil to alkaline before drying to ensure , No cyanide overflow, fully guarantee the precision and accuracy of the test results.

The invention discloses a method for removing cyanide in gold smelting red slag by a washing method. The method comprises the following steps: adding water into gold smelting red slag to prepare pulp; carrying out filter pressing on the obtained ore pulp to obtain a filter cake and filtrate; adding water into the obtained filter cake to prepare pulp; carrying out filter pressing on the obtained pulp to obtain a filter cake and filtrate; repeatedly and circularly adding water for pulping and performing filter pressing multiple times until the content of cyanide in a leaching solution of a filter cake obtained after the last filter pressing is less than 5 mg / L; combining all the filtrates after the filter pressing operation, and adding a flocculating agent into the obtained mixed solution; carrying out solid-liquid separation on the obtained mixed material; and repeatedly using liquid obtained after solid-liquid separation as water for washing the gold smelting red slag. According to the invention, the method is simple in step, easy to operate and remarkable in decyanation effect, the red slag can be treated into common solid waste, the collected washing liquid can be directly used as water for washing and decyanation of the red slag after being treated, and the resource utilization rate is high.

The invention discloses a detection method for rapidly and qualitatively testing the content of cyanide in wastewater treatment. A detection reagent is a mixed solution of orthotolidine and hydrochloric acid; the detection method comprises the following steps: firstly, injecting a certain amount of cyanide-containing wastewater into a test tube; then, dropping a plurality of drops of detection reagent into the test tube; finally, standing for 1-3 minutes, and observing the color in the test tube; the judging method comprises the following steps: if the color of a cyanide-containing wastewater test tube becomes yellow, indicating that the wastewater contains excessive residual chlorine, that is, the adding amount of sodium hypochlorite is enough to oxidize free and part of complex cyanide, and the cyanide-containing wastewater reaches the standard; if the color of the cyanide-containing wastewater test tube is not yellow, indicating that the adding amount of sodium hypochlorite is too small, and the cyanide-containing wastewater exceeds the standard. The detection method for rapidly and qualitatively testing the cyanide content in wastewater treatment is easy to operate, low in input cost and rapid in detection, whether the wastewater is qualified or not can be judged through direct observation, and convenience is provided for on-site detection.

The invention discloses a method for treating activated carbon adsorbing cyanide. The method comprises: 1. putting activated carbon subjected to the cyanide chloride and hydrocyanic acid protection time test in a beaker, adding 400mL of deionized water into each 100g of activated carbon, weighing 10g of calcium hypochlorite, adding the calcium hypochlorite into the solution along with stirring, adding 0.05g of sodium hydroxide into the system in each process until pH of 10, putting the breaker into an ultrasonic oscillator, adjusting power to 250w, carrying out vibration for 60min, adding a monopotassium phosphate-sodium hydroxide buffer solution into the system, adjusting pH to 6.0, adjusting power to 250w and carrying out vibration for 60min, and 2, adding a filtered sample into deionized water and carrying out secondary extraction so that the cyanide content of activated carbon is less than or equal to 0.015mg / g and the cyanide content of the waste liquid is less than or equal to 0.5mg / L. The method realizes integration of the waste liquid treatment and the non-toxic treatment on poisoned activated carbon, has simple and cheap treatment processes and prevents the secondary pollution of the treated wastes.

The invention discloses a treatment method of cyaniding gold extraction wastewater. The method comprises the following steps: preparing a silicon-based acid solution from sodium silicate and a hydrochloric acid solution; preparing cyaniding gold extraction aluminum-containing wastewater from aluminum chloride and cyaniding gold extraction wastewater; preparing cyaniding gold extraction silicon-aluminum-containing acidic water from the silicon-based acid solution and the cyaniding gold extraction aluminum-containing wastewater; carrying out low-temperature plasma irradiation on the cyaniding gold extraction silicon-aluminum-containing acidic water to obtain a poly-silicon-aluminum precursor solution; and carrying out low-temperature plasma irradiation on the poly-silicon-aluminum precursorsolution to obtain a silicon-based flocculant. The wastewater treatment process is simple, required raw material sources are wide, the lowest content of total cyanides in the flocculant prepared fromthe cyaniding gold extraction wastewater is only 0.04 mg / kg; meanwhile, the prepared flocculant can be suitable for a water environment with the pH value of 1-13, the heavy metal removal rate is high,99% of lead, 98% of mercury, 98% of cadmium, 99% of zinc and 99% of copper in the simulation liquid can be removed to the maximum extent, and the flocculant is particularly key for solving the problems existing in the current cyaniding gold extraction wastewater treatment process.