CN107364985B - Method for removing complex heavy metal ions in water body - Google Patents
Method for removing complex heavy metal ions in water body Download PDFInfo
- Publication number
- CN107364985B CN107364985B CN201610318318.3A CN201610318318A CN107364985B CN 107364985 B CN107364985 B CN 107364985B CN 201610318318 A CN201610318318 A CN 201610318318A CN 107364985 B CN107364985 B CN 107364985B
- Authority
- CN
- China
- Prior art keywords
- heavy metal
- water
- complex
- metal ions
- water body
- 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.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
- C02F1/683—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water by addition of complex-forming compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
Abstract
The invention relates to the technical field of wastewater treatment, in particular to a method for removing complex heavy metal ions in a water body. The invention provides a method for removing complex heavy metal ions in a water body, which comprises the following steps: 1) reacting the water body containing the complex heavy metal ions with a heavy metal replacement reagent, and then adding a heavy metal capture agent. The method for removing the complex heavy metal ions in the water body is simple, easy to operate, low in cost, wide in concentration range of the removable heavy metal ions and capable of efficiently removing the heavy metal ions, and the concentration content of the heavy metal ions in the effluent is less than 0.1 ppm.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a method for removing complex heavy metal ions in a water body.
Background
The electroplating industry is known as one of three major pollution industries in the world today. The waste water discharged in the production process contains heavy metal ions such as chromium, copper, nickel and the like, and also contains highly toxic substances such as cyanide and the like and a large amount of organic pollutants, the water quality is complex and is not easy to control, and the method is one of the most difficult-to-treat industrial waste water. Heavy metal ions and compounds thereof contained in these waste waters have toxicity, and if discharged without effective treatment, they cause serious harm to the environment and human beings. For example, nickel is retained in the spinal cord, brain, lung and heart after entering the human body, and inhibits enzyme systems, thereby causing chronic lesions of organs and endangering life. The skin can be allergic and ulcerated after being frequently contacted with the high-concentration nickel ion solution and the steam thereof, thereby causing great harm to the human body. Therefore, the nickel is listed as a national harmful pollutant, and the wastewater of the nickel needs to be separately collected and separately treated to reach the standard. The national regulations currently provide that the maximum allowable emission concentration is 0.5mg/L, and the specific emission limit of water pollutants is 0.1mg/L (discharge Standard for electroplating pollutants (GB 21900-2008)).
The sources of the complexing heavy metal wastewater are wide, and the discharge of industrial wastewater is the most main source of the pollution of the complexing heavy metal in the environment. The industrial wastewater containing a large amount of complex heavy metals mainly comprises wastewater discharged by industries such as metal smelting industry, printed circuit board industry, printing and dyeing industry, paper making industry, electroplating industry and the like, and free metal ions in the industrial wastewater are discharged into a water body and then are mixed with OH in a natural water body-、Cl-、SO4 2-、NH4+Organic acids, amino acids, humic acids and fulvic acids, etc. may combine to form various complexes or chelates.
In heavy metal ion wastewater, the source of complex heavy metal ions, especially complex nickel wastewater is wide and difficult to treat, and the complex nickel wastewater is always a difficult point and a hot point for treatment in the field of environmental protection. At present, most of electroplating wastewater is difficult to reach the standard after being treated, and the reason is that the electroplating wastewater is complex, contains a large amount of inorganic and organic complexing agents such as ammonia nitrogen, carboxylic acid, alcohol, organic phosphoric acid, ethylene diamine tetraacetic acid, nicotinic acid and the like, and can generate a dissolved stable complex (complex nickel for short) with nickel ions in water, so that the difficulty in treating the wastewater is increased. While the complete breaking of the complex is difficult to realize by adopting the common method for treatment, such as a chemical precipitation method and the like. Most of the domestic complex nickel wastewater is generally subjected to complex breaking by adopting sodium sulfide or a heavy metal trapping agent. However, a large amount of complexing agent is still difficult to completely remove, so that effluent cannot reach the standard and is discharged.
The conventional treatment method of heavy metal wastewater mainly comprises a chemical precipitation method, an ion exchange method, an evaporation concentration method, an electrolysis method, an activated carbon adsorption method, a silica gel adsorption method, a membrane separation method and the like, but the methods have the defects of incomplete removal, high cost, generation of toxic sludge or other waste materials and the like. For example, the chemical precipitation method has the disadvantages of large dosage of used medicament, high cost, large amount of sludge generation and increased burden of subsequent treatment; the ion exchange method has poor universality, different resins are required to be selected for different ions, excessive regeneration waste liquid is generated, the salt consumption is large, and the ion exchange resins are polluted by the existence of organic matters; the electrolytic method is not suitable for treating heavy gold ion wastewater with lower concentration; the activated carbon adsorption method has high treatment cost, is easy to generate secondary pollution and the like.
The pollutants contained in the complex heavy metal wastewater are not biodegradable, have strong toxicity and can cause cancers through the accumulation of food chains in organisms. Compared with the free heavy metal ions, the removal difficulty of the complex heavy metal ions is higher, and the satisfactory treatment effect is difficult to obtain by the common alkali-adding neutralization precipitation method.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a method for removing complex heavy metal ions from a water body, comprising the following steps: 1) reacting the water body containing the complex heavy metal ions with a heavy metal replacement reagent, and then adding a heavy metal capture agent. The method for removing the complex heavy metal ions in the water body is simple, easy to operate, low in cost, wide in concentration range of the removable heavy metal ions and capable of efficiently removing the heavy metal ions, and the concentration content of the heavy metal ions in the effluent is less than 0.1 ppm.
In order to achieve the above objects and other related objects, the present invention provides a method for removing complex heavy metal ions from a water body, comprising the steps of: 1) reacting the water body containing the complex heavy metal ions with a heavy metal replacement reagent, and then adding a heavy metal capture agent.
Preferably, the method further comprises the following steps: 2) performing Fenton reaction on the supernatant obtained in the step 1), and then adjusting the pH value to perform precipitation.
More preferably, the method further comprises the following steps: 3) reacting the supernatant obtained in the step 2) with a heavy metal replacement reagent, and then adding a heavy metal capture agent.
The heavy metal ion is selected from Ni2+、Zn2+、Pb2+And Cu2+One or more of (a).
The total concentration of heavy metal ions is 0.5-399 ppm.
Preferably, the heavy metal displacement reagent is a heavy metal reduction displacement reagent or a heavy metal complex breaking displacement reagent.
More preferably, the heavy metal reductive cementation reagent is selected from SO2One or more of sodium sulfite, sodium sulfide and thiosulfate, and the heavy metal complex breaking displacement agent is selected from one or more of iron carbon powder, iron powder, ferric chloride, polyferric oxide, ferric sulfate, ferrous sulfate, ferric nitrate and ferrous chloride.
Preferably, in the step 1) or the step 3), the amount of the heavy metal displacement agent is 0.5-25 g/L, such as 0.5-1.5 g/L, 1.5-2 g/L, 2-5 g/L, 5-6 g/L, 6-10 g/L, 10-12 g/L, 12-15 g/L, 15-20 g/L or 20-25 g/L.
Preferably, the heavy metal capture agent is selected from one or more of anionic polyacrylamide, cationic polyacrylamide, neutral polyacrylamide, amphoteric polyacrylamide, polyaluminum chloride, polyaluminum ferric chloride, polyferric sulfate and polyaluminum ferric sulfate.
Preferably, in step 1) or step 3), the amount of the heavy metal scavenger is 10 to 200 g/ton of water, such as 10 to 12 g/ton of water, 12 to 15 g/ton of water, 15 to 20 g/ton of water, 20 to 25 g/ton of water, 25 to 50 g/ton of water, 50 to 100 g/ton of water, 100 to 150 g/ton of water, or 150 to 200 g/ton of water.
Preferably, in the step 1), the pH of the water containing the complex heavy metal ions is adjusted to 1-6, and then the water reacts with the heavy metal replacement reagent.
Preferably, in the step 1), the reaction time of the water body containing the complex heavy metal ions and the heavy metal replacement reagent is 1-4 hours.
Preferably, in step 1), the heavy metal scavenger is added after adjusting the pH to > 8.
Preferably, in the step 2), the supernatant obtained in the step 1) is subjected to fenton reaction after the pH value is adjusted to 1-6.
Preferably, in step 2), the fenton reaction is specifically performed by: adding hydrogen peroxide and ferrous ions into the supernatant obtained in the step 1).
More preferably, the dosage of the hydrogen peroxide is 2-20L/ton of water, such as 2-2.5L/ton of water, 2.5-6L/ton of water, 6-10L/ton of water, 10-18L/ton of water or 18-20L/ton of water, the dosage of the ferrous ions is 1.6-25 kg/ton of water, such as 1.6-2.5 kg/ton of water, 2.5-3 kg/ton of water, 3-8 kg/ton of water, 8-18 kg/ton of water or 18-25 kg/ton of water, and the concentration of the hydrogen peroxide is 20-40 wt%.
Preferably, in the step 2), the fenton reaction time is 1 to 4 hours.
Preferably, in step 2), the precipitation is carried out by adjusting the pH to > 8.
Preferably, in the step 3), the supernatant obtained in the step 2) is subjected to pH adjustment to 1-6 and then is reacted with a heavy metal displacement reagent.
Preferably, in step 3), the heavy metal scavenger is added after adjusting the pH to > 8.
Preferably, in the step 3), the reaction time of the supernatant obtained in the step 2) and the heavy metal replacement reagent is 1-4 hours.
As described above, the present invention has the following advantageous effects:
1. the method for removing the complex heavy metal ions in the water body combines the heavy metal replacement reagent and the heavy metal capture agent, and can effectively break the complex and remove the complex heavy metal ions in the water body;
2. the method for removing the complexed heavy metal ions in the water body combines the heavy metal ion replacement reaction and the Fenton reaction, can weaken or eliminate the acting force between the complexing agent and the heavy metal ions to the maximum extent, and achieves the effect of deeply removing the heavy metal ions;
3. the method for removing the complexing heavy metal ions in the water body has wide application range (from 399ppm to 0.5ppm) for the concentration of the heavy metal ions, high removal efficiency and deep removal effect, the concentration content of the heavy metal ions in the effluent is less than 0.1ppm, the special discharge limit value of the state on water pollutants is reached, and the method is particularly suitable for removing the complexing heavy metal ions;
4. the method for removing the complex heavy metal ions in the water body can effectively break the complex and efficiently remove the heavy metal ions in the complex heavy metal ions in the water body;
5. the method for removing the complex heavy metal ions in the water body has broad spectrum for removing the heavy metal ions;
6. the method for removing the complex heavy metal ions in the water body is simple, easy to operate and low in cost.
Drawings
FIG. 1 is a process flow diagram of the method for removing complex heavy metal ions in water according to the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It should be understood that the processing equipment or devices not specifically mentioned in the following examples are conventional in the art; all pressure values and ranges refer to absolute pressures.
Furthermore, it is to be understood that one or more method steps mentioned in the present invention does not exclude that other method steps may also be present before or after the combined steps or that other method steps may also be inserted between these explicitly mentioned steps, unless otherwise indicated; it is also to be understood that a combined connection between one or more devices/apparatus as referred to in the present application does not exclude that further devices/apparatus may be present before or after the combined device/apparatus or that further devices/apparatus may be interposed between two devices/apparatus explicitly referred to, unless otherwise indicated. Moreover, unless otherwise indicated, the numbering of the various method steps is merely a convenient tool for identifying the various method steps, and is not intended to limit the order in which the method steps are arranged or the scope of the invention in which the invention may be practiced, and changes or modifications in the relative relationship may be made without substantially changing the technical content.
Example 1
Water body (Ni) containing complex heavy metal ions2+:155mg/L；Zn2+:50mg/L)
1) Adjusting the pH value of a water body containing complex heavy metal ions to 6, reacting with a heavy metal replacement reagent sodium sulfide (12g/L) for 3 hours, adjusting the pH value to 9, and then adding a heavy metal trapping agent anionic polyacrylamide (25 g/ton water);
2) adjusting the pH value of the supernatant obtained in the step 1) to 2, then carrying out Fenton reaction, namely adding 6L of hydrogen peroxide/ton of water (the hydrogen peroxide content is 30%) and 8kg of ferrous ions/ton of water (ferrous sulfate), reacting for 2 hours, and then adjusting the pH value to 8.5 for precipitation;
3) adjusting the pH of the supernatant obtained in the step 2) to 5, reacting the supernatant with 6g/L of sodium sulfide as a heavy metal replacement reagent, adjusting the pH to 9 after the reaction time is 3 hours, and then adding 12 g/ton of water of anionic polyacrylamide as a heavy metal capture agent to obtain the heavy metal in the supernatantIon content of Ni2+:0.1ppm；Zn2+:0.05ppm.，Ni2+,Zn2+The removal rates were each: the removal rate of each heavy metal ion is close to 100 percent.
Example 2
Water body (Ni) containing complex heavy metal ions2+:88mg/L；Zn2+:55mg/L；Pb2+:20mg/L)
1) Adjusting the pH of a water body containing complex heavy metal ions to 1, reacting the water body with 5g/L of heavy metal displacement reagent sodium sulfite for 2 hours, adjusting the pH to 10, and then adding 20 g/ton of water of heavy metal trapping agent neutral polyacrylamide;
4) adjusting the pH value of the supernatant obtained in the step 1) to 1, and then carrying out Fenton reaction, namely adding 10L of hydrogen peroxide/ton of water (the hydrogen peroxide content is 30%) and 3kg of ferrous ions/ton of water (ferrous sulfate), wherein the reaction time is 3 hours, and then adjusting the pH value to 8.5 for precipitation;
5) adjusting the pH of the supernatant obtained in the step 2) to 4, reacting the supernatant with 10g/L of heavy metal displacement reagent sodium sulfite for 4 hours, adjusting the pH to 9, adding 100 g/ton of water of heavy metal trapping agent polyaluminium chloride to obtain the supernatant with the heavy metal ion content of Ni2+:0.02mg/L；Zn2+:0.01mg/L；Pb2+0.05mg/L, and the removal rates of the heavy metal ions are respectively about 100%, 100% and 99.8%.
Example 3
Water body (Ni) containing complex heavy metal ions2+:205mg/L；Zn2+:89mg/L；Pb2+:18mg/L；Cu2+:50mg/L)
1) Adjusting the pH of a water body containing complex heavy metal ions to 5, reacting with 25g/L of heavy metal replacement reagent ferric chloride for 3 hours, adjusting the pH to 8.5, and then adding 50 g/ton of heavy metal trapping agent cationic polyacrylamide;
2) adjusting the pH value of the supernatant obtained in the step 1) to 3, and then carrying out Fenton reaction, namely adding 20L of hydrogen peroxide/ton water (the concentration of the hydrogen peroxide is 30%) and 25kg of ferrous ions/ton water (ferrous sulfate), wherein the reaction time is 4 hours, and then adjusting the pH value to 9 for precipitation;
3) supernatant obtained in the step 2)Adjusting pH to 3, reacting with 15g/L of heavy metal replacement reagent ferric chloride for 3 hours, adjusting pH to 9, adding 150 g/ton of water of heavy metal trapping agent polyaluminum ferric chloride, and obtaining supernatant with heavy metal ion content of Ni2+:0.1mg/L；Zn2+:0.02mg/L；Pb2+:0.05mg/L；Cu2+0.05mg/L, and the removal rate of each heavy metal ion is 100%, 100%, 99.8% and 100%.
Example 4
Water body (Ni) containing complex heavy metal ions2+:28mg/L；Zn2+:42mg/L；Cu2+:8mg/L)
1) Adjusting the pH of a water body containing complex heavy metal ions to 5, reacting with 2g/L of heavy metal displacement reagent iron powder for 3 hours, adjusting the pH to 8.5, and then adding 10 g/ton of water of heavy metal trapping agent neutral polyacrylamide;
2) adjusting the pH of the supernatant obtained in the step 1) to 6, and then carrying out Fenton reaction, namely adding 2L of hydrogen peroxide/ton of water (the concentration of the hydrogen peroxide is 30%) and 1.6kg of ferrous ions/ton of water (ferrous sulfate), reacting for 1 hour, and then adjusting the pH to 9 for precipitation;
3) adjusting the pH of the supernatant obtained in the step 2) to 6, reacting the supernatant with 2g/L of heavy metal displacement reagent iron powder for 1 hour, adjusting the pH to 10, adding 10 g/ton of water of polymeric ferric sulfate serving as a heavy metal catcher to obtain the supernatant with the heavy metal ion content of Ni2+:0.005mg/L；Zn2+:0.04mg/L；Cu2+0.01mg/L, and the removal rate of each heavy metal ion is about 100%, 100% and 99% respectively.
Example 5
Water body (Ni) containing complex heavy metal ions2+:286mg/L；Pb2+:25mg/L；Cu2+:88mg/L)
1) Adjusting the pH of a water body containing complex heavy metal ions to 2, reacting the water body with a heavy metal replacement reagent ferrous sulfate of 20g/L for 4 hours, adjusting the pH to 10, and then adding a heavy metal trapping agent amphoteric polyacrylamide of 200 g/ton water;
2) adjusting the pH value of the supernatant obtained in the step 1) to 3, and then carrying out Fenton reaction, namely adding 18L of hydrogen peroxide/ton water (the concentration of the hydrogen peroxide is 30%) and 18kg of ferrous ions/ton water (ferrous sulfate), wherein the reaction time is 3 hours, and then adjusting the pH value to 9 for precipitation;
3) adjusting the pH of the supernatant obtained in the step 2) to 1, reacting the supernatant with 20g/L of heavy metal displacement reagent ferrous sulfate for 3 hours, adjusting the pH to 10, adding 200 g/ton of water of heavy metal trapping agent polymeric ferric sulfate, and obtaining the supernatant with the heavy metal ion content of Ni2+:0.01mg/L；Zn2+:0.02mg/L；Cu2+0.05mg/L, and the removal rate of each heavy metal ion is about 100 percent, 100 percent and 100 percent respectively.
Example 6
Water body (Ni) containing complex heavy metal ions2+:0.5mg/L；Zn2+:3mg/L)
1) Adjusting the pH of a water body containing complex heavy metal ions to 4, reacting with 0.5g/L of heavy metal displacement reagent sodium sulfite for 2 hours, adjusting the pH to 9, adding 15 g/ton of water of heavy metal trapping agent anion polyacrylamide to obtain supernatant with the heavy metal ion content of Ni2+:0.01ppm；Zn2+:0.05ppm.，Ni2+,Zn2+The removal rates were each: 98% and close to 100%.
Example 7
Water body (Ni) containing complex heavy metal ions2+:2mg/L；Zn2+:4mg/L)
1) Adjusting the pH of a water body containing complex heavy metal ions to 3, reacting the water body with a heavy metal complex breaking displacement reagent ferrous chloride of 1.5g/L for 2 hours, adjusting the pH to 9, and then adding a heavy metal trapping agent neutral polyacrylamide of 12 g/ton water;
2) adjusting the pH of the supernatant obtained in the step 1) to 3, performing Fenton reaction, namely adding 2.5L of hydrogen peroxide/ton water (the hydrogen peroxide content is 30%) and 2.5kg of ferrous ions/ton water (ferrous sulfate), reacting for 2 hours, adjusting the pH to 9, and precipitating to obtain the supernatant with the heavy metal ion content of Ni2+:0.05ppm；Zn2+:0.01ppm.，Ni2+,Zn2+The removal rates were each: 98% and close to 100%.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A method for removing complex heavy metal ions in a water body is characterized by comprising the following steps: 1) reacting the water body containing the complex heavy metal ions with a heavy metal replacement reagent, and then adding a heavy metal capture agent; 2) performing Fenton reaction on the supernatant obtained in the step 1), and then adjusting the pH value to perform precipitation; 3) reacting the supernatant obtained in the step 2) with a heavy metal displacement reagent, and then adding a heavy metal capture agent; the heavy metal ion is selected from Ni2+、Zn2+、Pb2+And Cu2+The total concentration of heavy metal ions is 0.5-399 ppm; in the step 1), the dosage of the heavy metal displacement reagent is 0.5-25 g/L, and the dosage of the heavy metal trapping agent is 10-200 g/ton of water; in the step 2), the fenton reaction is specifically performed by: adding hydrogen peroxide and ferrous ions into the supernatant obtained in the step 1), wherein the dosage of the hydrogen peroxide is 2-20L/ton of water, and the dosage of the ferrous ions is 1.6-25 kg/ton of water; in the step 3), the dosage of the heavy metal displacement reagent is 0.5-25 g/L, and the dosage of the heavy metal trapping agent is 10-200 g/ton of water.
2. The method of claim 1, wherein the heavy metal displacement agent is a heavy metal reduction displacement agent or a heavy metal complex breaking displacement agent.
3. The method of claim 2, wherein the heavy metal reductive displacement agent is selected from the group consisting of SO2One or more of sodium sulfite, sodium sulfide and thiosulfate, and heavy metal sulfateThe complex replacement reagent is selected from one or more of iron carbon powder, iron powder, ferric chloride, polyferric oxide, ferric sulfate, ferric nitrate, ferrous sulfate and ferrous chloride.
4. The method of claim 1, wherein the heavy metal scavenger is selected from the group consisting of anionic polyacrylamide, cationic polyacrylamide, neutral polyacrylamide, amphoteric polyacrylamide, polyaluminum chloride, polyaluminum ferric chloride, polyferric sulfate, and polyaluminum ferric sulfate.
5. The method for removing the complex heavy metal ions in the water body according to claim 1, wherein in the step 1), the water body containing the complex heavy metal ions is reacted with the heavy metal replacement reagent after the pH value is adjusted to 1-6.
6. The method according to claim 1, wherein the heavy metal scavenger is added after the pH is adjusted to be greater than 8 in step 1).
7. The method of claim 1, wherein in step 2), the precipitation is performed by adjusting the pH to > 8.
8. The method for removing the complex heavy metal ions in the water body according to claim 1, wherein in the step 3), the supernatant obtained in the step 2) is reacted with a heavy metal replacement reagent after the pH is adjusted to 1-6.
9. The method according to claim 1, wherein the heavy metal scavenger is added after the pH is adjusted to be greater than 8 in step 3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610318318.3A CN107364985B (en) | 2016-05-13 | 2016-05-13 | Method for removing complex heavy metal ions in water body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610318318.3A CN107364985B (en) | 2016-05-13 | 2016-05-13 | Method for removing complex heavy metal ions in water body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107364985A CN107364985A (en) | 2017-11-21 |
| CN107364985B true CN107364985B (en) | 2021-02-26 |
Family
ID=60304152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610318318.3A Active CN107364985B (en) | 2016-05-13 | 2016-05-13 | Method for removing complex heavy metal ions in water body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107364985B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108751226B (en) * | 2018-06-06 | 2019-04-30 | 深圳市深投环保科技有限公司 | A method of urea ammonium nitrate solution is prepared using circuit board tin-stripping waste nitric acid |
| CN108866570A (en) * | 2018-07-26 | 2018-11-23 | 江南大学 | A kind of method that cyclone electrolytic cell recycles complexing nickel in electroplating wastewater |
| CN109019743A (en) * | 2018-08-07 | 2018-12-18 | 南京理工大学 | Utilize molysite-desulfurized gypsum system removal EDTA-Pb method |
| CN110052491B (en) * | 2019-05-07 | 2021-06-18 | 河北立拓环境技术有限公司 | Remediation method for heavy metal contaminated soil |
| CN112678983A (en) * | 2019-10-17 | 2021-04-20 | 中国石油化工股份有限公司 | Wastewater treatment method for removing heavy metals and reducing COD |
| CN111072123B (en) * | 2019-12-19 | 2022-01-07 | 南京理工大学 | Method for removing complex lead by ferrous phosphate under anoxic condition |
| CN111995167A (en) * | 2020-07-07 | 2020-11-27 | 广西夏阳环保科技有限公司 | Treatment method of acidic heavy metal wastewater |
| CN111995030A (en) * | 2020-07-10 | 2020-11-27 | 广西夏阳环保科技有限公司 | Chromium, nickel, zinc and copper electroplating wastewater treatment agent and treatment method thereof |
| CN112225234A (en) * | 2020-10-20 | 2021-01-15 | 东江环保股份有限公司 | Resource utilization method of high-salinity salty mud containing sodium chloride and sodium sulfate |
| CN112591926A (en) * | 2020-10-21 | 2021-04-02 | 孙亚春 | Treatment process for complexing heavy metal wastewater |
| CN113772799A (en) * | 2021-09-16 | 2021-12-10 | 苏州博洋化学股份有限公司 | Efficient heavy metal capture agent |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103833123B (en) * | 2014-02-21 | 2016-05-11 | 陈瀚翔 | A kind of processing method of complexing chemical nickel electroplating wastewater |
| CN104108819B (en) * | 2014-06-13 | 2015-10-14 | 南京大学 | A kind of combination process processing heavy metal complexing waste water |
| CN104925987A (en) * | 2015-05-13 | 2015-09-23 | 中山大学 | Treatment method for complex metal wastewater |
| CN105016532B (en) * | 2015-08-13 | 2017-08-29 | 安徽工程大学 | A kind of processing method of the copper waste water containing complexing of low concentration |
-
2016
- 2016-05-13 CN CN201610318318.3A patent/CN107364985B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107364985A (en) | 2017-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107364985B (en) | Method for removing complex heavy metal ions in water body | |
| CN110818173B (en) | Comprehensive treatment method of electroplating mixed wastewater | |
| KR100221556B1 (en) | Treatment method for flue gas desulfurization drain | |
| KR100778754B1 (en) | Method for chemical treatment of wastewater comprising cyanide compounds | |
| CN106430507B (en) | Purifying agent for aqueous solution containing heavy metal and method for purifying aqueous solution containing heavy metal | |
| JP2013163144A (en) | Treatment method for cyanide-containing wastewater | |
| JP7166795B2 (en) | Method for treating wastewater containing COD components | |
| CN105293659B (en) | A kind of emergent stabilization treatment method of the deposit of Heavy Metals in Waters pollutant | |
| JP4165637B2 (en) | Method for treating wastewater containing harmful substances without producing sludge and chemicals used therefor | |
| CN110963612A (en) | Method for co-processing lead and arsenic composite pollutants in underground water by adopting pre-oxidation | |
| Zhuang et al. | A new technology for the treatment of mercury contaminated water and soils | |
| CN112591926A (en) | Treatment process for complexing heavy metal wastewater | |
| CN109621904A (en) | The purification method of nickeliferous aqueous solution cleanser and nickeliferous aqueous solution | |
| JPS58196888A (en) | Treatment of waste water | |
| CN101781050A (en) | Method for treating low-concentration chromate waste water | |
| JPS6339693A (en) | Method for treating waste water containing cyanogen | |
| Fallahizadeh et al. | Removal of Natural Organic Matter (NOM), Turbidity, and Color of surface water by integration of enhanced coagulation process and direct filtration | |
| CN114524553A (en) | Process for treating heavy metal wastewater by using alkaline-boiling tungsten slag | |
| KR100495765B1 (en) | Method of preparing iron oxide catalysts for fenton oxidation and use of iron oxide catalysts prepared thereby | |
| JP3350820B2 (en) | Treatment method for waste liquid containing heavy metal ions | |
| JP4052428B2 (en) | Treatment method and treatment agent for lead-containing wastewater | |
| CN106007057B (en) | Treatment method of COD (chemical oxygen demand) and ammonia nitrogen mixed waste liquid | |
| JP4706828B2 (en) | Method and apparatus for treating nitrate-containing water | |
| CN110759512A (en) | Novel method for treating potassium chloride cyanide-free cadmium plating wastewater | |
| CN113003769B (en) | Closed cycle treatment method for soil leaching waste liquid |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200518 Address after: 200030, 41 floor, building 1, 398 Heqing Road, Minhang District, Shanghai, Applicant after: LYUCHENG INVESTMENT (SHANGHAI) Co.,Ltd. Address before: 200240, 41 floor, building 1, 398 Heqing Road, Minhang District, Shanghai, Applicant before: HEHAU ENVIRONMENTAL PROTECTION TECHNOLOGY (SHANGHAI) Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230727 Address after: No. 29, Baihai Road, Baishiyi, Jiulongpo District, Chongqing 400000 Patentee after: CHONGQING MOLECULAR WATER SYSTEM Co.,Ltd. Address before: Room C1017, 1st floor, building 41, 398 Heqing Road, Minhang District, Shanghai 200030 Patentee before: LYUCHENG INVESTMENT (SHANGHAI) CO.,LTD. |
|
| TR01 | Transfer of patent right |