CN116002905A - Method for deeply removing thallium in wastewater - Google Patents
Method for deeply removing thallium in wastewater Download PDFInfo
- Publication number
- CN116002905A CN116002905A CN202211688482.5A CN202211688482A CN116002905A CN 116002905 A CN116002905 A CN 116002905A CN 202211688482 A CN202211688482 A CN 202211688482A CN 116002905 A CN116002905 A CN 116002905A
- Authority
- CN
- China
- Prior art keywords
- thallium
- adsorption
- resin
- wastewater
- containing solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a method for deeply removing thallium in wastewater, which comprises the following steps: adsorbing thallium-containing solution by using mercaptan resin to remove thallium, eluting and regenerating thallium-adsorbed thallium adsorption resin to obtain elution waste liquid; regulating the pH value of the elution waste liquid to be less than or equal to 3, adding sulfide to carry out precipitation reaction, regulating the pH value of a reaction system to be more than or equal to 9, separating to obtain filtrate and filter residue, and finishing the advanced treatment of thallium in the wastewater. Compared with the removal method, the method provided by the invention has the following advantages that the mercaptan resin is used as thallium adsorption resin: the thallium-containing catalyst has good selectivity to thallium and wide applicability; high thallium adsorption and removal rate, and yielding waterFar below emission standards; the regeneration is convenient; for Tl + And Tl 3+ Can be directly adsorbed and removed; the treatment cost is low, and the treatment cost per ton is less than 0.5 yuan. The method has the advantages of simple process, convenient operation, low treatment cost and the like, can thoroughly remove thallium, is convenient for recycling thallium, has high use value and good application prospect.
Description
Technical Field
The invention belongs to the field of thallium-containing wastewater treatment, and relates to a method for deeply removing thallium in wastewater.
Background
Thallium is one of the most toxic and hazardous rare dispersive elements at present, and has bioaccumulation property. Thallium and its compounds have mutagenicity, carcinogenicity and teratogenicity to organisms, and their toxicity to humans is far greater than Hg, cd, pb, as, sb and other heavy metal elements. Thallium can enter the human body through the alimentary canal, the respiratory system, skin contact and other modes, participate in metabolism of the human body, and can cause continuous damage to the nervous system and the central system of the human body. Thallium is widely distributed in the crust and is present in low levels, but can coexist with many elements in many ores, and when the ores are utilized, thallium enters the environment together with other elements. The thallium related industry is mainly focused on industries such as lead-zinc smelting, steel smelting, chemical production, pigment manufacturing and the like. With human activities, the environmental migration of thallium is exacerbated, which can lead to contamination of some soil environments, both in natural flow areas, with thallium and thallium compounds.
Aiming at the characteristics of thallium, the treatment technology of thallium is mainly divided into an electrochemical method, a chemical precipitation method, an ion exchange method, an adsorption method, a membrane method, a biochemical method and the like.
Electrochemical method: the method mainly adopts an electric flocculation process and an electrocatalytic oxidation process, wherein cerium is adsorbed and coagulated by utilizing high-activity polymeric metal hydroxide and polymer thereof generated by electrolysis in the electric flocculation process, and Tl is treated by the electrocatalytic oxidation process + I.e. oxidized to TI 3+ Removal is performed, however, the process flow is long and a complicated pretreatment process is required.
Chemical precipitation: there are oxidative precipitation, adsorption precipitation and sulfidation precipitation, using Tl (OH) 3 And Tl 2 S and the like have small solubility, and oxidation neutralization or vulcanization precipitation is performed, but a large amount of chemical is required, and generally effluent can be stabilized only at about 0.05mg/L, and when the thallium removal rate needs to be increased, the maximum chemical dosage is required in multiples, and in addition, the thallium is difficult to be stably reduced to 0.005mg/L or less.
Ion exchange method: can use cation exchange resin to make Tl + Adsorption removal is performed, but conventional resins have difficulty in thoroughly separating thallium from other metals under the influence of other metal ions such as Ca, mg and the like in water quality. TlCl can also be used as an anion exchange resin 4 - And Tl (SO) 4 ) 2 - The anionic complex of the trivalent thallium is adsorbed and removed, but the anionic complex of the trivalent thallium can only aim at specific anionic complex of thallium, the pretreatment condition is complex, the thallium removal rate is not high, and the purity of the obtained thallium chloride product is not high. In addition, the adsorption effect of thallium ions in wastewater by using macroporous chelate resin containing sulfhydryl groups in the prior art is poor, and thallium ions (Tl) 3+ ) Thoroughly separated from the wastewater, and the macroporous chelate resin containing sulfhydryl groups can adsorb other metal ions, and has the function of removing thallium ions (Tl + ) And thus is unfavorable for obtaining thallium products with high purity, which also greatly limits the recycling of thallium in wastewater.
Adsorption method: adsorption removal is performed by using an adsorption material such as activated carbon or metal oxide, for example, thallium can be reduced to 0.02mg/L by using a nanoscale manganese ferrite adsorbent, but raw water needs to be oxidized first.
Membrane method: the nanofiltration membrane or the reverse osmosis membrane is mainly adopted, and various salts such as thallium, colloid, microorganisms, organic matters and the like can be intercepted, but the investment and the operation cost are high, especially when the salt content of raw water is high.
Biochemical method: the metabolism of microorganisms is used to perform an indirect or direct oxidation-reduction reaction with contaminants, but the treatment effect is general and the impact resistance is poor.
Therefore, the method for deeply removing thallium in wastewater, which has the advantages of simple process, convenient operation and low treatment cost, has important significance for thoroughly solving the thallium pollution problem and improving the recycling utilization rate of thallium.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for deeply removing thallium in wastewater, which has the advantages of simple process, convenient operation and low treatment cost.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for deeply removing thallium in wastewater, comprising the following steps:
s1, thallium-containing solution is adsorbed by thallium adsorption resin to remove thallium, so as to obtain thallium-removed liquid; the thallium adsorption resin is a mercaptan resin;
s2, eluting and regenerating the thallium adsorption resin adsorbed with thallium to obtain an elution waste liquid and an unloaded thallium adsorption resin;
s3, adjusting the pH value of the elution waste liquid to be less than or equal to 3, adding sulfide to carry out precipitation reaction, adjusting the pH value of a reaction system to be more than or equal to 9, and separating to obtain filtrate and filter residues, thereby finishing the advanced treatment of thallium in the wastewater.
In the method for deeply removing thallium from wastewater, further improvement is provided, in the step S1, thallium adsorption resin is filled in adsorption columns, and a plurality of adsorption columns are used for adsorption in a serial manner; the mercaptan resin is methyl mercaptan resin.
In the method for deeply removing thallium in wastewater, further improvement is made, in the step S1, the speed of the thallium-containing solution flowing through the adsorption column is 1 BV/h-40 BV/h.
In the method for deeply removing thallium in wastewater, further improvement is provided, in the step S1, the initial concentration of thallium in the thallium-containing solution is 0.0001mg/L to 100mg/L; the pH value of the thallium-containing solution is more than or equal to 1.
In the above method for deeply removing thallium from wastewater, further improved, in S1, the thallium-containing solution further includes the following treatments before adsorption: filtering thallium-containing solution by adopting a filtering membrane with the aperture less than or equal to 1 mu m to remove suspended matters in the solution; and discharging the thallium-removed liquid after reaching the standard.
In the above method for deeply removing thallium in wastewater, in the step S2, eluting and regenerating the thallium adsorption resin adsorbed with thallium by using an eluent; the eluent comprises at least one of hydrochloric acid solution with the mass concentration of 1-36%, sulfuric acid solution with the mass concentration of 1-50% and mixed solution of hydrochloric acid/chloride; the mass concentration of hydrochloric acid in the mixed solution of hydrochloric acid/chlorine salt is 0.1-5%, and the mass concentration of chlorine salt is 10-30%; the chloride salt is at least one of sodium chloride, potassium chloride, calcium chloride and magnesium chloride; the dosage of the eluent is 3 BV-10 BV; the speed of the eluent is 1 BV/h-10 BV/h.
In the above method for deeply removing thallium from wastewater, further improved, in S2, the unloaded thallium adsorption resin returns to S1 for adsorption thallium removal from thallium-containing solution.
In the above method for deeply removing thallium in wastewater, in the step S3, alkaline substances are used to adjust pH values of the eluting waste liquid and the reaction system; the alkaline substance is at least one of lime, sodium hydroxide, potassium hydroxide and magnesium hydroxide.
In the above method for deeply removing thallium from wastewater, further improved, in S3, the sulfide is at least one of sodium sulfide, sodium hydrosulfide, calcium sulfide, magnesium sulfide, and hydrogen sulfide.
In the method for deeply removing thallium in wastewater, which is further improved, in the step S3, the filtrate is returned to the step S1, and the treatment is continued.
Compared with the prior art, the invention has the advantages that:
aiming at the defects of complex process, difficult operation, high treatment cost, difficult complete thallium removal and the like in the existing ion exchange method, the invention creatively provides a method for deeply removing thallium in wastewater, which takes thiol resin as thallium adsorption resin and has the following advantages: (a) Has good selectivity to thallium, is not influenced by elements such as calcium and magnesium, has wide applicability, can thoroughly separate thallium from other impurity elements in solution, has good adaptability to natural water bodies with high salt content and low thallium concentration and industrial sewage, and can also be used for preparing thallium-containing water bodies with high salt content and low concentrationSeparating thallium from the bottom; (b) The thallium adsorption removal rate is high and can reach more than 99.99%, and the thallium concentration in the effluent (after thallium removal liquid) can be reduced to below 0.0001mg/L, which is far lower than the emission standard; (c) The regeneration is convenient, after the thallium adsorption resin is saturated, the regeneration can be realized by only using a small amount of low-concentration acid, the resin can be recycled, the treatment cost is reduced, and the thallium-containing eluent obtained after elution has high thallium concentration and high purity, so that a thallium product with high purity can be obtained; (d) Is not affected by thallium ion morphology, for Tl + And Tl 3+ Can be directly adsorbed and removed, so that the thallium-containing solution is almost not required to be pretreated, and the process is simpler; (f) The adsorption capacity is large, the saturation time is long, the treatment cost is low, and the treatment cost per ton is less than 0.5 yuan. The method for deeply removing thallium in wastewater has the advantages of simple process, convenient operation, low treatment cost and the like, can thoroughly remove thallium in different solutions, is convenient for realizing the recycling of thallium, has high use value and good application prospect.
Drawings
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
FIG. 1 is a flow chart showing the recycling process of thallium in thallium-containing solution in example 3 of the present invention.
Detailed Description
The invention is further described below in connection with the drawings and the specific preferred embodiments, but the scope of protection of the invention is not limited thereby.
In the following examples, materials and instruments used are commercially available unless otherwise specified. The process adopted is a conventional process, the equipment adopted is a conventional equipment, and the obtained data are all average values of more than three repeated experiments.
Example 1
Investigating adsorption effect of different resins on different thallium-containing solutions
The first thallium-containing solution is the wastewater of neutralization of certain zinc smelting plant waste acid, the pH is 6.8, and the wastewater is filtered by 1um for later use. 2g of thallium adsorption resin, mercapto resin, aminophosphonic acid resin, iminodiacetic acid resin, cationic resin and anionic resin were each taken and 100mL of thallium-containing solution was added. And (5) after shaking adsorption for 6 hours, removing thallium and analyzing the liquid.
Wherein the thallium adsorption resin is a thiol resin, in particular methyl thiol resin (R-CH 2 SH, wherein R is a polystyrene polymer), the same as described below; the sulfhydryl resin is macroporous chelate resin containing sulfhydryl.
The results obtained are shown in Table 1 below.
TABLE 1 adsorption effect of different resins on thallium in thallium containing solution
And secondly, the thallium-containing solution is wastewater neutralized by sewage acid of a certain smelting plant, the pH value is 7.1, and the wastewater is filtered by 1um for later use.
0.5g of thallium-containing resin and 100mL of thallium-containing solution were added to each of the thallium-containing resin and the mercapto resin. And (5) after shaking adsorption for 6 hours, removing thallium and analyzing the liquid.
The results obtained are shown in Table 2 below.
TABLE 2 adsorption effect of thallium adsorption resin and mercapto resin on thallium in thallium-containing solution
| Project | Tl concentration (mg/L) | Tl adsorption Rate |
| Stock solution | 0.113 | — |
| Thallium adsorption resin | <0.00002 | 99.99％ |
| Mercapto resin | 0.0187 | 83.5％ |
Thirdly, the thallium-containing solution is wastewater neutralized by sewage acid of a certain smelting plant, the pH value is 7.1, and the wastewater is filtered by 1um for later use. And adding a reducing agent into the stock solution, stirring and reducing, and filtering for later use. 0.5g of thallium-containing resin and 100mL of thallium-containing solution were added to each of the thallium-containing resin and the mercapto resin. And (5) after shaking adsorption for 6 hours, removing thallium and analyzing the liquid.
The results obtained are shown in Table 3 below.
TABLE 3 adsorption effect of thallium adsorption resin and mercapto resin on thallium in reduced thallium-containing solution
| Project | Tl concentration (mg/L) | Tl adsorption Rate |
| Stock solution | 0.113 | — |
| Thallium adsorption resin | <0.00002 | 99.99％ |
| Mercapto resin | 0.0047 | 95.84％ |
As can be seen from tables 1 to 3, the thallium adsorption resin (methyl mercaptan resin) used in the present invention has a thallium adsorption rate as high as 99.99%, and has a very weak adsorption capacity for other ions, and has a very good selectivity, and the thallium ion concentration in the effluent solution can be reduced to below 0.0001mg/L after the thallium adsorption resin (methyl mercaptan resin) is treated. In addition, because the thallium element in the wastewater is neutralized by the polluted acid as Tl + Mainly contains a small amount of Tl 3+ . Aminophosphonic acid resin, iminodiacetic acid resin and cationic resin have certain adsorption capacity to thallium, but have strong adsorption capacity to metal ions such as Ca, mg and the like. Although the mercapto resin (mercapto group-containing macroporous chelate resin) was used for the thallium (Tl + ) Also has good adsorption effect, but also adsorbs zinc, and the adsorption amount of the sulfhydryl resin is very small, and has good adsorption effect only on low-concentration solution, and can not adsorb thallium ions (Tl 3+ ). In addition, the adsorption capacity of thallium by the anion resin is weak.
Example 2:
investigating adsorption effect of thallium adsorption resin on different thallium-containing solutions
The first thallium-containing solution is the wastewater of neutralization of certain zinc smelting plant waste acid, the pH is 6.7, the conductivity is 31700us/cm, and the wastewater is filtered by 1um for later use.
Stage 1 adsorption: 50g of thallium adsorption resin are newly filled in the resin column, and the filling layer is 27cm in height. The filtered thallium-containing solution was then pumped continuously at a rate of 20BV/h and then analyzed by sampling every 500 mL.
The results obtained for stage 1 adsorption are shown in Table 4 below.
TABLE 4 adsorption effect of thallium adsorption resin on different elements in thallium-containing solution
The average concentration of thallium in the obtained 1-stage thallium-removed solution was 0.00021mg/L, and the thallium adsorption rate was 99.992%.
Stage 2 adsorption: 50g of thallium adsorption resin is filled in the resin column, the thallium removed from stage 1 is pumped into the resin column to obtain a thallium removed from stage 2 liquid, and the liquid is sampled and analyzed.
The results obtained in stage 2 adsorption are shown in Table 5 below.
TABLE 5 adsorption Effect of thallium in thallium-containing solution after the thallium adsorption resin was connected in series
| Project | Tl concentration (mg/L) | Tl adsorption Rate |
| Stock solution | 2.66625 | — |
| Level 1 thallium removal solution (average value) | 0.00021 | 99.992％ |
| Level 2 thallium removal solution (average value) | 0.00005 | 99.998％ |
The second thallium-containing solution is high-salt wastewater of a zinc-germanium smelting plant, the pH is 7.1, the potassium chloride content is about 200g/L, the sodium chloride content is about 100g/L, the fluorine content is about 10g/L, and the wastewater is filtered by 1um for later use.
Stage 1 adsorption: 50g of thallium adsorption resin is filled in the resin column, the filtered thallium-containing solution is pumped into the resin column to obtain 1-level thallium-removed liquid, and sampling analysis is performed.
Stage 2 adsorption: 50g of thallium adsorption resin is filled in the resin column, the thallium removed from stage 1 is pumped into the resin column to obtain a thallium removed from stage 2 liquid, and the liquid is sampled and analyzed.
The results obtained are shown in Table 6 below.
TABLE 6 adsorption Effect of thallium in thallium-containing solution after the thallium adsorption resin was connected in series
| Project | Tl concentration (mg/L) | Tl adsorption Rate |
| Stock solution | 52.93 | — |
| 1-grade thallium-removing liquid | 0.167 | 99.68％ |
| 2-level thallium-removing liquid | 0.00014 | 99.999％ |
Thirdly, the thallium-containing solution is a zinc sulfate solution of a zinc sulfate smelting plant, the pH is 5.0, the zinc content is about 67.3g/L, and the zinc-containing solution is filtered by 1um for later use.
Stage 1 adsorption: 50g of thallium adsorption resin is filled in the resin column, the filtered thallium-containing solution is pumped into the resin column to obtain 1-level thallium-removed liquid, and sampling analysis is performed.
Stage 2 adsorption: 50g of thallium adsorption resin is filled in the resin column, the thallium removed from stage 1 is pumped into the resin column to obtain a thallium removed from stage 2 liquid, and the liquid is sampled and analyzed.
The results obtained are shown in Table 7 below.
TABLE 7 adsorption Effect of thallium in thallium-containing solution after the thallium adsorption resin was connected in series
| Project | Tl concentration (mg/L) | Tl adsorption Rate |
| Stock solution | 32.33 | — |
| 1-grade thallium-removing liquid | 0.523 | 98.38％ |
| 2-level thallium-removing liquid | 0.00175 | 99.995％ |
Fourthly, the thallium-containing solution is desulfurization wastewater of a cold steel plant, after filtering by 1um, the desulfurization wastewater is pumped into a resin column filled with 25g of thallium adsorption resin, and 4 liquid samples after thallium removal are continuously taken every 200mL for analysis.
The results obtained are shown in Table 8 below.
TABLE 8 adsorption effect of thallium adsorption resin on thallium in thallium containing solution
Fifth, thallium-containing solution is a natural water body, after filtering with 1um, the thallium-containing solution is pumped into a resin column filled with 25g thallium adsorption resin, and 5 liquid samples after thallium removal are continuously taken every 200mL for analysis.
The results obtained are shown in Table 9 below.
TABLE 9 adsorption effect of thallium adsorption resin on thallium in thallium containing solution
| Project | Tl concentration (mg/L) | Tl adsorption Rate |
| Stock solution | 0.019 | — |
| Thallium-removed solution 1 | 0.00008 | 99.58％ |
| Thallium-removed liquid 2 | 0.00004 | 99.79％ |
| Thallium-removed liquid 3 | 0.00007 | 99.63％ |
| Thallium-removed solution 4 | 0.00003 | 99.84％ |
| Thallium-removed solution 5 | 0.00007 | 99.63％ |
Example 3:
a method for deeply removing thallium in wastewater, as shown in fig. 1, comprising the following steps:
(1) The thallium-containing solution is wastewater neutralized by a certain zinc smelting plant waste acid, the pH value is 7.1, the thallium-containing solution is conveyed into a filter by a pump, and a filtering membrane with the aperture of 1 μm is used for filtering (precise filtering) to remove suspended matters in the solution.
(2) Continuously pumping the thallium-containing solution after the filtration treatment into two adsorption columns (25L of adsorption resin is filled in each adsorption column) which are connected in series and are filled with thallium adsorption resin (methyl mercaptan resin), and adsorbing Tl in the solution by using the thallium adsorption resin connected in series at the speed of 20BV/h + And Tl 3+ Thallium-adsorbed thallium resin and thallium-removed liquid are obtained. Stock solutions and thallium-removed liquid samples were taken and analyzed, and the results are shown in table 10. As is clear from Table 10, the thallium-containing solution after the thallium-adsorbing resin treatment had a thallium adsorption removal rate of 99.99%, and the thallium-removed solution had a thallium concentration of 0.00037mg/L, which satisfies the relevant discharge requirements, and was directly discharged.
Table 10 comparison of contents of the respective components in the thallium-containing solution before and after adsorption
(3) Continuously pumping 200L hydrochloric acid solution (eluent ) with mass concentration of 5% into an adsorption column filled with thallium adsorption resin at a flow rate of 3BV/h, and eluting and regenerating the thallium adsorption resin adsorbed with thallium to obtain unloaded thallium adsorption resin and eluting waste liquid. In this step, the obtained unloaded thallium-containing adsorption resin is returned to step (1) and is continuously used for adsorption of thallium-containing solution.
(4) And (3) regulating the pH value of the elution waste liquid to 2.0 by lime, adding sodium sulfide for precipitation separation, then continuously regulating the pH value of a solution (a reaction system) to 10 by lime, filtering and separating to obtain filtrate and filter residues, and finishing the advanced treatment of thallium in the waste water. In this step, the filtrate obtained is returned to (1), and the treatment is continued.
From the above results, it is clear that the present invention has the following advantages in that a thiol resin is used as a thallium adsorption resin: (a) The thallium-containing water treatment device has good selectivity to thallium, is not influenced by elements such as calcium and magnesium, has wide applicability, can thoroughly separate thallium from other impurity elements in the solution, has good adaptability to natural water bodies with high salt content and low thallium concentration and industrial sewage, and can thoroughly separate thallium from thallium-containing water bodies with high salt content and low concentration; (b) The thallium adsorption removal rate is high and can reach more than 99.99%, and the thallium concentration in the effluent (after thallium removal liquid) can be reduced to below 0.0001mg/L, which is far lower than the emission standard; (c) The regeneration is convenient, after the thallium adsorption resin is saturated, the regeneration can be realized by only using a small amount of acid and alkali with low concentration, the resin can be recycled, the treatment cost is reduced, and the thallium-containing eluent obtained after elution has high thallium concentration and high purity, so that a thallium product with high purity can be obtained; (d) Is not affected by thallium ion morphology, for Tl + And Tl 3+ Can be directly adsorbed and removed, so that the thallium-containing solution is almost not required to be pretreated, and the process is simplerA sheet; (f) The adsorption capacity is large, the saturation time is long, the treatment cost is low, and the treatment cost per ton is less than 0.5 yuan. Therefore, the method for deeply removing thallium in wastewater has the advantages of simple process, convenient operation, low treatment cost, high income and the like, can recover thallium in different solutions, is convenient for realizing the recycling of thallium, has high use value and good application prospect.
The present invention is disclosed in the preferred embodiments, but is not limited thereto. Many variations and modifications of the present invention will be apparent to those skilled in the art, using the methods and techniques disclosed above. Therefore, any simple modification of the above embodiments according to the technical substance of the present invention is still within the scope of the technical solution of the present invention, without departing from the technical solution of the present invention.
Claims (10)
1. A method for deeply removing thallium from wastewater, comprising the steps of:
s1, thallium-containing solution is adsorbed by thallium adsorption resin to remove thallium, so as to obtain thallium-removed liquid; the thallium adsorption resin is a mercaptan resin;
s2, eluting and regenerating the thallium adsorption resin adsorbed with thallium to obtain an elution waste liquid and an unloaded thallium adsorption resin;
s3, adjusting the pH value of the elution waste liquid to be less than or equal to 3, adding sulfide to carry out precipitation reaction, adjusting the pH value of a reaction system to be more than or equal to 9, and separating to obtain filtrate and filter residues, thereby finishing the advanced treatment of thallium in the wastewater.
2. The method for deeply removing thallium from wastewater according to claim 1, wherein in S1, the thallium adsorption resin is filled in an adsorption column, and a plurality of the adsorption columns are adsorbed in series; the mercaptan resin is methyl mercaptan resin.
3. A method for deep removal of thallium from wastewater according to claim 2, wherein in S1, the thallium-containing solution is flowed through the adsorption column at a rate of 1BV/h to 40BV/h.
4. A method for the deep removal of thallium from wastewater according to claim 3, wherein in S1, the initial concentration of thallium in the thallium containing solution is between 0.0001mg/L and 100mg/L; the pH value of the thallium-containing solution is more than or equal to 1.
5. A method for the deep removal of thallium from wastewater according to claim 4, wherein in S1, the thallium containing solution further comprises the following treatment prior to adsorption: filtering thallium-containing solution by adopting a filtering membrane with the aperture less than or equal to 1 mu m to remove suspended matters in the solution; and discharging the thallium-removed liquid after reaching the standard.
6. A method for deeply removing thallium from wastewater according to any one of claims 1 to 5, wherein in S2, the thallium-adsorbed thallium-adsorbing resin is eluted and regenerated with an eluent; the eluent comprises at least one of hydrochloric acid solution with the mass concentration of 1-36%, sulfuric acid solution with the mass concentration of 1-50% and mixed solution of hydrochloric acid/chloride; the mass concentration of hydrochloric acid in the mixed solution of hydrochloric acid/chlorine salt is 0.1-5%, and the mass concentration of chlorine salt is 10-30%; the chloride salt is at least one of sodium chloride, potassium chloride, calcium chloride and magnesium chloride; the dosage of the eluent is 3 BV-10 BV; the speed of the eluent is 1 BV/h-10 BV/h.
7. A method for deep removal of thallium from wastewater according to any one of claims 1 to 5, characterized in that in S2 the unloaded thallium adsorption resin is returned to S1 for adsorption removal of thallium from thallium containing solution.
8. The method for deeply removing thallium from wastewater according to any one of claims 1 to 5, wherein in S3, alkaline substances are used to adjust pH values of the elution waste liquid and the reaction system; the alkaline substance is at least one of lime, sodium hydroxide, potassium hydroxide and magnesium hydroxide.
9. A method for deep removal of thallium from wastewater according to any one of claims 1 to 5, wherein in S3 the sulfide is at least one of sodium sulfide, sodium hydrosulfide, calcium sulfide, magnesium sulfide, and hydrogen sulfide.
10. The method for deep removal of thallium from wastewater according to any one of claims 1 to 5, wherein in S3 the filtrate is returned to S1 and the treatment is continued.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211688482.5A CN116002905A (en) | 2022-12-28 | 2022-12-28 | Method for deeply removing thallium in wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211688482.5A CN116002905A (en) | 2022-12-28 | 2022-12-28 | Method for deeply removing thallium in wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116002905A true CN116002905A (en) | 2023-04-25 |
Family
ID=86026169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211688482.5A Pending CN116002905A (en) | 2022-12-28 | 2022-12-28 | Method for deeply removing thallium in wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116002905A (en) |
-
2022
- 2022-12-28 CN CN202211688482.5A patent/CN116002905A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9963360B2 (en) | Removal of dissolved selenium from aqueous solutions | |
| US4519912A (en) | Process for the removal of sulfate and metals from aqueous solutions | |
| CN104773863A (en) | Deep purification process for thallium-containing waste water | |
| Twidwell et al. | Technologies and potential technologies for removing selenium from process and mine wastewater | |
| CN102765831A (en) | Purification method of wastewater containing heavy metal and arsenic | |
| CN103553249A (en) | Method for acid separation and heavy metal recovery in electroplating waste liquor | |
| CN110038647B (en) | Method for efficiently regenerating resin by using electrolytic salt solution | |
| CN104692579A (en) | Advanced recycling method for wastewater generated in making acid by using smelting flue gas | |
| CN113754198A (en) | Advanced treatment process for comprehensive wastewater containing heavy metals | |
| CN106315947A (en) | Processing system and processing technology for industrial sewage containing heavy metal | |
| CN115652114B (en) | Recycling process of thallium in thallium-containing solution | |
| Jha et al. | Treatment of rayon waste effluent for the removal of Zn and Ca using Indion BSR resin | |
| Nyamunda | Review of the impact on water quality and treatment options of cyanide used in gold ore processing | |
| CN102642974B (en) | Method for treating high-acid high-chlorine waste water | |
| CN110117108A (en) | A kind of processing method of high concentration cadmium wastewater | |
| Wang et al. | Biosorption of metals onto granular sludge | |
| CN108374095B (en) | Method for recovering silver from silver-containing aqueous solution | |
| US5395534A (en) | Water filtration medium and method of use | |
| CN113088702A (en) | Method for recovering valuable elements from acid leaching solution of roasting slag of gold-containing sulfur concentrate | |
| CN116002905A (en) | Method for deeply removing thallium in wastewater | |
| US20220267175A1 (en) | Process for Reducing Selenium from Ion-Exchange Brine | |
| EP3196170A1 (en) | Process for reducing selenium from an ion-exchange or adsorption media spent regenerant | |
| CN210559747U (en) | Industrial heavy metal sewage treatment system | |
| Mitchenko et al. | Optimization of sorption purification of industrial effluents, waste waters and technological solutions from polyvalent metal ions | |
| CN103739054B (en) | Coprocessing method for phenylhydantoin phenolic wastewater and coked phenolic wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |