A method for removing trace thallium ions in water

Abstract

The invention discloses a method for removing trace thallium ions in water, belongs to the field of environmental protection technology, and specifically relates to adding a regulator to thallium-containing wastewater, adding a Prussian blue reagent and ferric chloride for treatment, and separating to obtain thallium-removed purified water; the Prussian blue reagent includes a Prussian blue reagent and / or a Prussian blue binder; the Prussian blue binder contains an additive, and the additive includes one or more of acetylcysteine, sodium alginate, sodium citrate, and polyvinyl pyrrolidone. The method of the invention has good adsorption performance for thallium ions in thallium-containing wastewater, that is, it has good removal effect for thallium ions in thallium-containing wastewater, and the Prussian blue binder prepared in the method of the invention has good stability, and can be better used to remove thallium ions in wastewater.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for removing trace thallium ions in water. Background Art

[0002] In the removal of thallium ions in water, the existing technologies are mainly based on sodium sulfide chemical precipitation and potassium permanganate oxidation technology. Sodium sulfide chemical precipitation method: using sulfur ions to combine with thallium ions to generate water-insoluble thallium sulfide particles to remove free thallium ions in water; potassium permanganate oxidation method: using the strong oxidizing property of potassium permanganate to oxidize monovalent thallium ions into trivalent thallium ions to generate water-insoluble thallium oxide particles, and the manganese dioxide generated at the same time can also adsorb part of the thallium. The technical point of the sodium sulfide precipitation method is to generate thallium sulfide precipitate, which will decompose and release harmful and smelly gas hydrogen sulfide under acidic conditions, and thallium ions can be released for a second time. Therefore, this technology has certain environmental risks during application. In order to meet the emission standards, the amount of sodium sulfide used is relatively large, and there is a problem of high treatment cost. The potassium permanganate oxidation method has lower environmental risks and the treatment effect is relatively ideal, but the high price of potassium permanganate leads to high treatment costs, and it is not suitable for the treatment of large-scale water bodies containing trace amounts of thallium ions. Summary of the invention

[0003] The purpose of the present invention is to provide a method for removing trace thallium ions in water which has stable thallium removal effect, is environmentally friendly and has good stability.

[0004] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0005] A method for removing trace thallium ions in water comprises: adding a regulator to thallium-containing wastewater, adding a Prussian blue reagent and ferric chloride for treatment, and separating to obtain thallium-removed purified water; the Prussian blue reagent comprises a Prussian blue reagent and / or a Prussian blue binder; the Prussian blue binder contains an additive, and the additive comprises acetylcysteine. Under neutral or slightly acidic conditions, thallium ions will undergo an ion exchange reaction with potassium ions in Prussian blue, and trace thallium ions will be enriched in Prussian blue nanoparticles. The Prussian blue particles will generate flocs and settle under the coagulation of iron salts, and after solid-liquid separation, thallium ions can be effectively removed. Both monovalent thallium ions and trivalent thallium ions can be effectively removed. The present invention further introduces an additive to prepare a Prussian blue binder, and then applies it to thallium-containing wastewater, thereby improving the adsorption and removal effect of thallium ions in the wastewater, and due to the use of the additive, the stability of the Prussian blue binder is improved.

[0006] Preferably, the conditioning agent is calcium oxide or hydrochloric acid.

[0007] Preferably, the amount of potassium ferrocyanide in the Prussian blue reagent is 30-50 wt % of ferric chloride.

[0008] Preferably, in the removal of thallium ions, a regulator is added to the thallium-containing wastewater to adjust the pH to 6-7, and then a Prussian blue reagent is added, stirred at 20-40°C for 20-60 minutes, and then ferric chloride is added, stirred for 1-5 minutes, and allowed to stand for 20-60 minutes, and the water is discharged to obtain clean water after thallium removal.

[0009] More preferably, in the removal of thallium ions, the regulator is calcium oxide or hydrochloric acid, and the amount of Prussian blue reagent used is 0.5-2.5wt% of the thallium-containing wastewater.

[0010] More preferably, in the removal of thallium ions, the amount of ferric chloride used is 50-70 wt % of the Prussian blue binder.

[0011] Preferably, in the removal of thallium ions, the Prussian blue reagent may be replaced by a Prussian blue binder.

[0012] Preferably, in the Prussian blue binder, the amount of acetylcysteine ​​is 5-20 wt % of ferric chloride.

[0013] Preferably, the additive further comprises one or more of sodium alginate, sodium citrate and polyvinyl pyrrolidone.

[0014] More preferably, the amount of sodium alginate is 2-10 wt % of the ferric chloride; the amount of sodium citrate is 2-10 wt % of the ferric chloride; and the amount of polyvinyl pyrrolidone is 2-10 wt % of the ferric chloride.

[0015] Preferably, in the preparation of the Prussian blue reagent, potassium ferrocyanide and ferric chloride are added to deionized water, and stirred at 20-40° C. for 20-60 min to obtain the Prussian blue reagent.

[0016] More preferably, in the preparation of the Prussian blue reagent, the amount of ferric chloride used is 30-50 wt % of deionized water.

[0017] More preferably, in the preparation of the Prussian blue reagent, the amount of potassium ferrocyanide used is 30-50 wt % of the ferric chloride.

[0018] Preferably, in the preparation of the Prussian blue binder, potassium ferrocyanide and ferric chloride are added to deionized water, and then acetylcysteine ​​is added, and the mixture is stirred at 20-40° C. for 20-60 min, and then aged at 40-60° C. for 1-3 h to obtain the Prussian blue binder.

[0019] More preferably, in the preparation of the Prussian blue binder, the amount of ferric chloride used is 30-50 wt % of deionized water.

[0020] More preferably, in the preparation of the Prussian blue binder, the amount of potassium ferrocyanide used is 30-50 wt % of the ferric chloride.

[0021] More preferably, in the preparation of the Prussian blue binder, the amount of acetylcysteine ​​used is 5-20wt% of ferric chloride.

[0022] Preferably, sodium alginate can be added in the preparation of the Prussian blue binder, wherein the amount of sodium alginate used is 2-10 wt % of the ferric chloride.

[0023] Preferably, sodium citrate can be added in the preparation of the Prussian blue binder, wherein the amount of sodium citrate used is 2-10 wt % of the ferric chloride.

[0024] Preferably, polyvinyl pyrrolidone can be added in the preparation of the Prussian blue binder, wherein the amount of polyvinyl pyrrolidone used is 2-10 wt % of the ferric chloride.

[0025] Preferably, serinol can be added in the preparation of the Prussian blue binder. The usage amount of serinol is 1-6wt% of ferric chloride. The present invention finds that when using serinol, after using acetylcysteine, using serinol again, the improvement effect of the adsorption and removal of thallium ions by the obtained Prussian blue binder is weaker, and when using any one of sodium alginate, sodium citrate, polyvinyl pyrrolidone, and after using acetylcysteine, the use of serinol has a better effect.

[0026] The invention discloses a Prussian blue binder, which is prepared by adding an additive into the preparation of a Prussian blue reagent, wherein the additive comprises acetylcysteine.

[0027] Preferably, the additive further comprises one or more of sodium alginate, sodium citrate and polyvinyl pyrrolidone.

[0028] The invention discloses the function of the Prussian blue binder in purifying wastewater containing metal ions.

[0029] The invention prepares a Prussian blue reagent by potassium ferrocyanide and ferric chloride, and adds an additive to prepare a Prussian blue binder when preparing the Prussian blue reagent, wherein the additive comprises one or more of acetylcysteine, sodium alginate, sodium citrate and polyvinyl pyrrolidone. Since the Prussian blue reagent or the Prussian blue binder is used in thallium-containing wastewater, the invention has the following beneficial effects: good adsorption and removal effect of thallium ions, and the obtained Prussian blue binder has good stability. Therefore, the invention is a method for removing trace thallium ions in water with stable thallium removal effect, environmental friendliness and good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is the electron microscope image of Prussian blue binder;

[0031] Figure 2 is the diagram of thallium ion adsorption;

[0032] Figure 3 This is the graph of thallium ion adsorption after aging treatment. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described in detail below in conjunction with specific implementations and drawings:

[0034] Embodiment 1:

[0035] A method for removing trace thallium ions from water.

[0036] Preparation of Prussian blue reagent: Potassium ferrocyanide and ferric chloride are added to deionized water, and stirred at 30°C for 30 minutes to obtain Prussian blue reagent. The amount of ferric chloride used is 40wt% of deionized water, and the amount of potassium ferrocyanide used is 40wt% of ferric chloride.

[0037] Removal of thallium ions: Add a regulator to the thallium-containing wastewater to adjust the pH to 7, then add Prussian blue reagent, stir for 30 minutes at 30°C, then add ferric chloride, stir for 3 minutes, let stand for 30 minutes, and discharge the water to obtain purified water after thallium removal. The regulator is calcium oxide or hydrochloric acid, the amount of Prussian blue reagent used is 1.5wt% of the thallium-containing wastewater, and the amount of ferric chloride used is 60wt% of the Prussian blue binder.

[0038] Embodiment 2:

[0039] A method for removing trace thallium ions from water.

[0040] Preparation of Prussian blue binder: Potassium ferrocyanide and ferric chloride are added to deionized water, and then acetylcysteine ​​is added, stirred at 30°C for 30 minutes, and then aged at 50°C for 2 hours to obtain Prussian blue binder. The amount of ferric chloride used is 40wt% of deionized water, the amount of potassium ferrocyanide used is 40wt% of ferric chloride, and the amount of acetylcysteine ​​used is 20wt% of ferric chloride.

[0041] Removal of thallium ions: Add a regulator to the thallium-containing wastewater to adjust the pH to 7, then add a Prussian blue binder, stir for 30 minutes at 30°C, then add ferric chloride, stir for 3 minutes, let stand for 30 minutes, and discharge the water to obtain purified water after thallium removal. The regulator is calcium oxide or hydrochloric acid, the amount of Prussian blue binder used is 1.5wt% of the thallium-containing wastewater, and the amount of ferric chloride used is 60wt% of the Prussian blue binder.

[0042] Embodiment 3:

[0043] A method for removing trace thallium ions from water.

[0044] Preparation of Prussian blue binder: Potassium ferrocyanide and ferric chloride are added to deionized water, and then acetylcysteine ​​and sodium alginate are added, stirred at 30°C for 30 minutes, and then aged at 50°C for 2 hours to obtain Prussian blue binder. The amount of ferric chloride used is 40wt% of deionized water, the amount of potassium ferrocyanide used is 40wt% of ferric chloride, the amount of acetylcysteine ​​used is 40wt% of ferric chloride, and the amount of sodium alginate used is 6wt% of ferric chloride.

[0045] Removal of thallium ions: Add a regulator to the thallium-containing wastewater to adjust the pH to 7, then add a Prussian blue binder, stir for 30 minutes at 30°C, then add ferric chloride, stir for 3 minutes, let stand for 30 minutes, and discharge the water to obtain purified water after thallium removal. The regulator is calcium oxide or hydrochloric acid, the amount of Prussian blue binder used is 1.5wt% of the thallium-containing wastewater, and the amount of ferric chloride used is 60wt% of the Prussian blue binder.

[0046] Embodiment 4:

[0047] A method for removing trace thallium ions from water.

[0048] Preparation of Prussian blue binder: Potassium ferrocyanide and ferric chloride are added to deionized water, and then acetylcysteine ​​and sodium citrate are added, stirred at 30°C for 30 minutes, and then aged at 50°C for 2 hours to obtain a Prussian blue binder. The amount of ferric chloride used is 40wt% of deionized water, the amount of potassium ferrocyanide used is 40wt% of ferric chloride, the amount of acetylcysteine ​​used is 40wt% of ferric chloride, and the amount of sodium citrate used is 6wt% of ferric chloride.

[0049] Removal of thallium ions: Add a regulator to the thallium-containing wastewater to adjust the pH to 7, then add a Prussian blue binder, stir for 30 minutes at 30°C, then add ferric chloride, stir for 3 minutes, let stand for 30 minutes, and discharge the water to obtain purified water after thallium removal. The regulator is calcium oxide or hydrochloric acid, the amount of Prussian blue binder used is 1.5wt% of the thallium-containing wastewater, and the amount of ferric chloride used is 60wt% of the Prussian blue binder.

[0050] Embodiment 5:

[0051] A method for removing trace thallium ions from water.

[0052] Preparation of Prussian blue binder: Potassium ferrocyanide and ferric chloride are added to deionized water, and then acetylcysteine ​​and polyvinyl pyrrolidone are added, stirred at 30°C for 30 minutes, and then aged at 50°C for 2 hours to obtain a Prussian blue binder. The amount of ferric chloride used is 40wt% of deionized water, the amount of potassium ferrocyanide used is 40wt% of ferric chloride, the amount of acetylcysteine ​​used is 40wt% of ferric chloride, and the amount of polyvinyl pyrrolidone used is 6wt% of ferric chloride.

[0053] Removal of thallium ions: Add a regulator to the thallium-containing wastewater to adjust the pH to 7, then add a Prussian blue binder, stir for 30 minutes at 30°C, then add ferric chloride, stir for 3 minutes, let stand for 30 minutes, and discharge the water to obtain purified water after thallium removal. The regulator is calcium oxide or hydrochloric acid, the amount of Prussian blue binder used is 1.5wt% of the thallium-containing wastewater, and the amount of ferric chloride used is 60wt% of the Prussian blue binder.

[0054] Embodiment 6:

[0055] A method for removing trace thallium ions from water.

[0056] Preparation of Prussian blue binder: Potassium ferrocyanide and ferric chloride are added to deionized water, and then acetylcysteine ​​and serinol are added, stirred at 30°C for 30 minutes, and then aged at 50°C for 2 hours to obtain a Prussian blue binder. The amount of ferric chloride used is 40wt% of deionized water, the amount of potassium ferrocyanide used is 40wt% of ferric chloride, the amount of acetylcysteine ​​used is 40wt% of ferric chloride, and the amount of serinol used is 6wt% of ferric chloride.

[0057] Removal of thallium ions: Add a regulator to the thallium-containing wastewater to adjust the pH to 7, then add a Prussian blue binder, stir for 30 minutes at 30°C, then add ferric chloride, stir for 3 minutes, let stand for 30 minutes, and discharge the water to obtain purified water after thallium removal. The regulator is calcium oxide or hydrochloric acid, the amount of Prussian blue binder used is 1.5wt% of the thallium-containing wastewater, and the amount of ferric chloride used is 60wt% of the Prussian blue binder.

[0058] Embodiment 7:

[0059] A method for removing trace thallium ions from water.

[0060] Preparation of Prussian blue binder: Potassium ferrocyanide and ferric chloride are added to deionized water, and then acetylcysteine, sodium alginate and serinol are added, stirred at 30°C for 30 minutes, and then aged at 50°C for 2 hours to obtain Prussian blue binder. The amount of ferric chloride used is 40wt% of deionized water, the amount of potassium ferrocyanide used is 40wt% of ferric chloride, the amount of acetylcysteine ​​used is 40wt% of ferric chloride, the amount of sodium alginate used is 3wt% of ferric chloride, and the amount of serinol used is 3wt% of ferric chloride.

[0061] Removal of thallium ions: Add a regulator to the thallium-containing wastewater to adjust the pH to 7, then add a Prussian blue binder, stir for 30 minutes at 30°C, then add ferric chloride, stir for 3 minutes, let stand for 30 minutes, and discharge the water to obtain purified water after thallium removal. The regulator is calcium oxide or hydrochloric acid, the amount of Prussian blue binder used is 1.5wt% of the thallium-containing wastewater, and the amount of ferric chloride used is 60wt% of the Prussian blue binder.

[0062] Embodiment 8:

[0063] A method for removing trace thallium ions from water.

[0064] Preparation of Prussian blue binder: Potassium ferrocyanide and ferric chloride are added to deionized water, and then acetylcysteine, sodium citrate and serinol are added, stirred at 30°C for 30 minutes, and then aged at 50°C for 2 hours to obtain a Prussian blue binder. The amount of ferric chloride used is 40wt% of deionized water, the amount of potassium ferrocyanide used is 40wt% of ferric chloride, the amount of acetylcysteine ​​used is 40wt% of ferric chloride, the amount of sodium citrate used is 3wt% of ferric chloride, and the amount of serinol used is 3wt% of ferric chloride.

[0065] Removal of thallium ions: Add a regulator to the thallium-containing wastewater to adjust the pH to 7, then add a Prussian blue binder, stir for 30 minutes at 30°C, then add ferric chloride, stir for 3 minutes, let stand for 30 minutes, and discharge the water to obtain purified water after thallium removal. The regulator is calcium oxide or hydrochloric acid, the amount of Prussian blue binder used is 1.5wt% of the thallium-containing wastewater, and the amount of ferric chloride used is 60wt% of the Prussian blue binder.

[0066] Embodiment 9:

[0067] A method for removing trace thallium ions from water.

[0068] Preparation of Prussian blue binder: Potassium ferrocyanide and ferric chloride are added to deionized water, and then acetylcysteine, polyvinyl pyrrolidone and serinol are added, stirred at 30°C for 30 minutes, and then aged at 50°C for 2 hours to obtain a Prussian blue binder. The amount of ferric chloride used is 40wt% of deionized water, the amount of potassium ferrocyanide used is 40wt% of ferric chloride, the amount of acetylcysteine ​​used is 40wt% of ferric chloride, the amount of polyvinyl pyrrolidone used is 3wt% of ferric chloride, and the amount of serinol used is 3wt% of ferric chloride.

[0069] Removal of thallium ions: Add a regulator to the thallium-containing wastewater to adjust the pH to 7, then add a Prussian blue binder, stir for 30 minutes at 30°C, then add ferric chloride, stir for 3 minutes, let stand for 30 minutes, and discharge the water to obtain purified water after thallium removal. The regulator is calcium oxide or hydrochloric acid, the amount of Prussian blue binder used is 1.5wt% of the thallium-containing wastewater, and the amount of ferric chloride used is 60wt% of the Prussian blue binder.

[0070] Comparative Example 1:

[0071] A method for removing trace thallium ions in water. Compared with Example 2, this comparative example is different in that the Prussian blue binder is replaced by a Prussian blue reagent and acetylcysteine ​​in the removal of thallium ions.

[0072] Comparative Example 2:

[0073] A method for removing trace thallium ions in water. Compared with Example 3, this comparative example is different in that the Prussian blue binder is replaced by a Prussian blue reagent, acetylcysteine ​​and sodium alginate in the removal of thallium ions.

[0074] Comparative Example 3:

[0075] A method for removing trace thallium ions in water. Compared with Example 4, this comparative example is different in that the Prussian blue binder is replaced by a Prussian blue reagent, acetylcysteine ​​and sodium citrate in the removal of thallium ions.

[0076] Comparative Example 4:

[0077] A method for removing trace thallium ions in water. Compared with Example 5, this comparative example is different in that the Prussian blue binder is replaced by a Prussian blue reagent, acetylcysteine ​​and polyvinyl pyrrolidone in the removal of thallium ions.

[0078] Comparative Example 5:

[0079] A method for removing trace thallium ions in water. Compared with Example 6, this comparative example is different in that the Prussian blue binder is replaced by a Prussian blue reagent, acetylcysteine ​​and serinol in the removal of thallium ions.

[0080] Comparative Example 6:

[0081] A method for removing trace thallium ions in water. Compared with Example 7, this comparative example is different in that the Prussian blue binder in the removal of thallium ions is replaced by a Prussian blue reagent and acetylcysteine, sodium alginate, and serinol.

[0082] Comparative Example 7:

[0083] A method for removing trace thallium ions in water. Compared with Example 8, this comparative example is different in that the Prussian blue binder is replaced by a Prussian blue reagent and acetylcysteine, sodium citrate, and serinol in the removal of thallium ions.

[0084] Comparative Example 8:

[0085] A method for removing trace thallium ions in water. Compared with Example 9, this comparative example is different in that the Prussian blue binder is replaced by a Prussian blue reagent and acetylcysteine, polyvinyl pyrrolidone, and serinol in the removal of thallium ions.

[0086] Test example:

[0087] 1. Electron Microscopy Characterization

[0088] Test sample: Prussian blue binder prepared in Example 3. The Prussian blue binder was dried in a vacuum drying oven.

[0089] The morphology of the test samples was characterized by scanning electron microscopy.

[0090] The electron microscope image of the dried Prussian blue binder is as follows: Figure 1 As shown, there are pores of different sizes on its surface, forming a network pore structure, and the surface is uneven, rough and uneven, and the components interact closely with each other.

[0091] 2. Thallium ion removal performance test

[0092] Test method: The methods of each embodiment and comparative example are used to carry out thallium removal test on thallium ions.

[0093] In the method application of each embodiment and comparative example, the concentration of thallium-containing wastewater is 100 mg / L. The amount of Prussian blue reagent or Prussian blue binder used is based on the amount after drying.

[0094] The method for removing trace thallium ions in water according to the present invention has the following results: Figure 2As shown, wherein S1 is Example 1, S2 is Example 2, S3 is Example 3, S4 is Example 4, S5 is Example 5, S6 is Example 6, S7 is Example 7, S8 is Example 8, S9 is Example 9, D1 is Comparative Example 1, D2 is Comparative Example 2, D3 is Comparative Example 3, D4 is Comparative Example 4, D5 is Comparative Example 5, D6 is Comparative Example 6, D7 is Comparative Example 7, and D8 is Comparative Example 8. The present invention prepares a Prussian blue reagent by potassium ferrocyanide and ferric chloride, and applies the reagent to thallium-containing wastewater to remove thallium ions therein. The present invention finds that some reagents can be compounded with potassium ferrocyanide and ferric chloride to prepare a Prussian blue binder, and then the Prussian blue When the binder is applied to thallium-containing wastewater, it has a better adsorption effect on thallium ions, that is, the effect of removing thallium is better. The above reagents include one or more of acetylcysteine, sodium alginate, sodium citrate, polyvinyl pyrrolidone and serinol. These reagents can also be used in combination. After using acetylcysteine, adding any one of sodium alginate, sodium citrate, polyvinyl pyrrolidone and serinol can increase the adsorption amount of thallium ions, and the use of any one of sodium alginate, sodium citrate and polyvinyl pyrrolidone is better than the use of serinol; after using acetylcysteine ​​and serinol, further using any one of sodium alginate, sodium citrate and polyvinyl pyrrolidone has a better adsorption effect on thallium ions.

[0095] 3. Stability test

[0096] The Prussian blue reagent or Prussian blue binder prepared by the methods of the embodiments and comparative examples was aged at 80° C. for 10 days and then treated according to the above-mentioned thallium ion removal performance test method.

[0097] The stability test results of the Prussian blue reagent or Prussian blue binder used in the present invention in removing trace thallium ions from water are as follows: Figure 3As shown, wherein S1 is Example 1, S2 is Example 2, S3 is Example 3, S4 is Example 4, S5 is Example 5, S6 is Example 6, S7 is Example 7, S8 is Example 8, S9 is Example 9, D1 is Comparative Example 1, D2 is Comparative Example 2, D3 is Comparative Example 3, D4 is Comparative Example 4, D5 is Comparative Example 5, D6 is Comparative Example 6, D7 is Comparative Example 7, and D8 is Comparative Example 8. The present invention prepares Prussian blue reagent by potassium ferrocyanide and ferric chloride, and applies it to thallium-containing wastewater to remove thallium ions therein. After aging treatment in the above manner, it is found that it still has a good thallium ion adsorption capacity, indicating that it has good stability. The present invention prepares Prussian blue reagent by compounding some reagents with potassium ferrocyanide and ferric chloride to prepare Prussian blue reagent. The Prussian blue binder is then subjected to aging treatment to improve its stability. After aging treatment, the adsorption effect of thallium ions on thallium-containing wastewater decreases less, that is, the stability is better. The above reagents include one or more of acetylcysteine, sodium alginate, sodium citrate, polyvinyl pyrrolidone and serinol. These reagents can also be used in combination. After using acetylcysteine, adding any one of sodium alginate, sodium citrate, polyvinyl pyrrolidone and serinol can improve its stability, and the use of any one of sodium alginate, sodium citrate and polyvinyl pyrrolidone is better than the use of serinol; after using acetylcysteine ​​and serinol, further using any one of sodium alginate, sodium citrate and polyvinyl pyrrolidone can improve its stability.

[0098] The above embodiments are only used to illustrate the present invention, but not to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention, and the patent protection scope of the present invention shall be defined by the claims.

Claims

1. A method for removing trace thallium ions in water, comprising: Adding a regulator into the thallium-containing wastewater, adding a Prussian blue reagent and ferric chloride for treatment, and separating to obtain thallium-free purified water; The Prussian blue reagent includes a Prussian blue binder; the Prussian blue binder contains additives, the additives include acetylcysteine ​​and serinol, and the additives also include one or more of sodium alginate, sodium citrate and polyvinyl pyrrolidone; the amount of potassium ferrocyanide in the Prussian blue binder is 30-50wt% of ferric chloride, and the amount of acetylcysteine ​​in the Prussian blue binder is 5-20wt% of ferric chloride; The regulator is calcium oxide or hydrochloric acid, the amount of sodium alginate used is 2-10wt% of ferric chloride; the amount of sodium citrate used is 2-10wt% of ferric chloride; the amount of polyvinyl pyrrolidone used is 2-10wt% of ferric chloride.

2. A Prussian blue binder for removing trace thallium ions in water, comprising: The additives are added to the preparation of the Prussian blue reagent to prepare the reagent. The additives include acetylcysteine ​​and serinol, and the additives also include one or more of sodium alginate, sodium citrate and polyvinyl pyrrolidone. The amount of potassium ferrocyanide in the Prussian blue reagent is 30-50wt% of ferric chloride. In the Prussian blue binder, the amount of acetylcysteine ​​is 5-20wt% of ferric chloride. The amount of sodium alginate used is 2-10wt% of ferric chloride. The amount of sodium citrate used is 2-10wt% of ferric chloride. The amount of polyvinyl pyrrolidone used is 2-10wt% of ferric chloride.

3. Use of the Prussian blue binder according to claim 2 in removing trace thallium ions in water.

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