CN111825191A - Acid sewage heavy metal capture agent - Google Patents
Acid sewage heavy metal capture agent Download PDFInfo
- Publication number
- CN111825191A CN111825191A CN202010442546.8A CN202010442546A CN111825191A CN 111825191 A CN111825191 A CN 111825191A CN 202010442546 A CN202010442546 A CN 202010442546A CN 111825191 A CN111825191 A CN 111825191A
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- CN
- China
- Prior art keywords
- sodium
- parts
- heavy metal
- dimethyldithiophosphate
- acid
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- 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.)
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Classifications
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- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal compounds
- C02F1/64—Heavy metal compounds of iron or manganese
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/206—Manganese or manganese compounds
-
- 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
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The acid sewage heavy metal catching agent is prepared from the following raw materials in parts by weight: 12-21 parts of sodium dimethyldithiophosphate; 6-10 parts of sodium dimethyldithiocarbamate; 3-6 parts of sodium thiosulfate; 1-3 parts of trisodium phosphate; 0.2 to 0.5 percent of sodium nitrite; 59.5-77.8 parts of water. The invention has simple preparation process and easy operation, can effectively carry out chemical reaction with heavy metals in acidic sewage with the pH value of 0-5 to generate insoluble substances which are insoluble in dilute acid solution and can almost capture Cu2+、Cd2+、Hg2+、Pb2+、Mn2+、Ni2+、Zn2+、Cr3+、Co3+And various heavy metals. The precipitation is fast, and the solid-liquid separation is fast, simple and convenient after the acid sewage is treated.
Description
Technical Field
The invention relates to the technical field of acidic sewage treatment, in particular to an acidic sewage heavy metal capture agent.
Background
The acidic sewage is a main water pollutant generated in the metal mineral smelting process, and typical acidic sewage is acid and acidic sewage generated in an acid making system, initial rainwater of a sulfuric acid site and initial rainwater of other sites in a production plant, seepage liquid of a hydrometallurgy workshop or a heap leaching site, a solution pool and a tailing pool, or leakage liquid of the sites caused by heavy rainstorm or dam break accidents, and the like. Acidic wastewater typically contains relatively high levels of free acid and has a pH below 5. The acidic sewage also contains Cu2+、Cd2+、Hg2+、Pb2+、Mn2+、Ni2 +、Zn2+、Cr6+、Co2+And the content of heavy metal ions in some sewage solutions can reach 5-10g/L, so that the sewage treatment method has a certain recovery value. In order to reduce the environmental pollution caused by the wastewater discharge of smelting enterprises, the acidic wastewater must be treated.
The chemical precipitation method is a contaminated acid treatment technology which is widely applied in smelting enterprises at present, and commonly used methods include a sulfuration method, a limestone/lime neutralization method, a lime + iron salt method, a lime neutralization method, a lime-iron salt (aluminum salt) method, a purification + membrane method, a biological agent method and the like, a membrane treatment method, an evaporation concentration reduction method and the like, wherein the sulfuration method and the limestone/lime neutralization method are emphasized because of being beneficial to the recovery of valuable metals. The method is to add a vulcanizing agent into the waste acid to ensure that heavy metal ions in the waste acid react with sulfur to generate insoluble metal sulfide precipitate for removal. The technology mainly removes cadmium, arsenic, antimony, copper, lead, zinc, mercury, nickel and the like, is suitable for waste water containing arsenic, copper, lead, zinc, nickel and the like with higher ion concentration in the non-ferrous metal smelting process, and has the characteristics of less slag amount, easiness in dehydration, high grade of settled slag metal and benefit for recycling valuable metal. However, the physical and chemical properties of the vulcanizing agents such as sodium sulfide and sodium hydrosulfide used in the vulcanization method are unstable, the vulcanizing agents are easy to decompose to generate hydrogen sulfide toxic gas, the solution in the acid solution is easy to decompose, and the defects of high vulcanizing agent consumption, large operation environment pollution, complex treatment accessory facilities and the like are overcome.
Disclosure of Invention
The invention aims to solve the technical problem of providing an acid sewage heavy metal trapping agent capable of strongly chelating heavy metal ions in acid wastewater aiming at the defects of the prior art.
The invention relates to an acid sewage heavy metal catching agent which is characterized by being prepared from the following raw materials in parts by weight: 12-21 parts of sodium dimethyldithiophosphate; 6-10 parts of sodium dimethyldithiocarbamate; 3-6 parts of sodium thiosulfate; 1-3 parts of trisodium phosphate; 0.2 to 0.5 percent of sodium nitrite; 59.5-77.8 parts of water. The preparation method comprises mixing the above materials at 15-40 deg.C.
In the technical scheme of the heavy metal catching agent for acidic sewage, the further preferable technical scheme is characterized in that:
1. the feed is prepared from the following raw materials in parts by weight: sodium dimethyldithiophosphate 12; sodium dimethyldithiocarbamate 6; sodium thiosulfate 3; trisodium phosphate 1; 0.2 of sodium nitrite; 59.5 parts of water;
2. the feed is prepared from the following raw materials in parts by weight: sodium dimethyldithiophosphate 21; sodium dimethyldithiocarbamate 10; sodium thiosulfate 6; trisodium phosphate 3; 0.5 of sodium nitrite; 77.8 parts of water;
3. the feed is prepared from the following raw materials in parts by weight: sodium dimethyldithiophosphate 12; sodium dimethyldithiocarbamate 6; sodium thiosulfate 3; trisodium phosphate 1; 0.2 of sodium nitrite; 77.8 parts of water;
4. the feed is prepared from the following raw materials in parts by weight: sodium dimethyldithiophosphate 21; sodium dimethyldithiocarbamate 10; sodium thiosulfate 6; trisodium phosphate 3; 0.5 of sodium nitrite; and (5) water 59.5.
Compared with the prior art, the invention has the beneficial effects that: the materials can still strongly chelate with heavy metal ions under an acidic condition to carry out chemical reaction, and flocculent precipitates which are insoluble, have low water content and are easy to filter and remove are quickly generated in a short time, so that the heavy metal ions are removed from the sewage. The preparation process of the heavy metal catching agent is simple and easy to operate; meanwhile, the heavy metal trapping agent has low toxicity, good storage stability and operation safety and stable physicochemical property.
The invention can not only react with Cu in the wastewater at normal temperature and in a wide pH value range2+、Cd2+、Hg2+、Pb2 +、Mn2+、Ni2+、Zn2+、Cr3+And various heavy metal ions, especially for the treatment of waste acid with pH value of 0-5 generated from non-ferrous metal smelting process, has good adsorption conversion stability to metal precipitate in the sewage, and is beneficial to the recovery of valuable metals; and is not influenced by the concentration of heavy metal ions. Even if the treated wastewater contains complex components, various heavy metal ions in the wastewater can be precipitated at one time, so that the wastewater reaches the discharge standard.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1, an acid sewage heavy metal scavenger is prepared from the following raw materials in parts by weight: 12-21 parts of sodium dimethyldithiophosphate; 6-10 parts of sodium dimethyldithiocarbamate; 3-6 parts of sodium thiosulfate; 1-3 parts of trisodium phosphate; 0.2 to 0.5 percent of sodium nitrite; 59.5-77.8 parts of water. The heavy metal trapping agent comprises sodium dimethyldithiophosphate, sodium dimethyldithiocarbamate, sodium thiosulfate, trisodium phosphate and sodium nitrite, can be solid raw materials and can also be liquid raw materials with different concentrations, and the weight ratio of the various raw materials of the prepared acid sewage heavy metal trapping agent is unchanged.
Example 2, the acid sewage heavy metal scavenger according to example 1 is prepared from the following raw materials in parts by weight: sodium dimethyldithiophosphate 12; sodium dimethyldithiocarbamate 6; sodium thiosulfate 3; trisodium phosphate 1; 0.2 of sodium nitrite; and (5) water 59.5.
Example 3, the acid wastewater heavy metal scavenger according to example 1 or 2 is prepared from the following raw materials in parts by weight: sodium dimethyldithiophosphate 21; sodium dimethyldithiocarbamate 10; sodium thiosulfate 6; trisodium phosphate 3; 0.5 of sodium nitrite; and (7) water 77.8.
Example 4, the acid wastewater heavy metal scavenger according to example 1, 2 or 3 is prepared from the following raw materials in parts by weight: sodium dimethyldithiophosphate 12; sodium dimethyldithiocarbamate 6; sodium thiosulfate 3; trisodium phosphate 1; 0.2 of sodium nitrite; and (7) water 77.8.
Example 5, the heavy metal scavenger for acidic wastewater according to any one of examples 1 to 4, is prepared from the following raw materials in parts by weight: sodium dimethyldithiophosphate 21; sodium dimethyldithiocarbamate 10; sodium thiosulfate 6; trisodium phosphate 3; 0.5 of sodium nitrite; and (5) water 59.5.
Example 6, sodium dimethyldithiophosphate 12 kg; 6kg of sodium dimethyldithiocarbamate; 3kg of sodium thiosulfate; 1kg of trisodium phosphate; 0.2kg of sodium nitrite; 77.8kg of water; and (3) uniformly stirring all the components at 15-40 ℃, and packaging to obtain the heavy metal trapping agent. When the heavy metal scavenger is used, the dosage of the heavy metal scavenger is calculated according to the molar content of various total metal ions in the acidic wastewater, and the dosage is 3-5 times of the total molar amount according to the chemical reaction formula.
Example 7, sodium dimethyldithiophosphate 21 kg; 10kg of sodium dimethyldithiocarbamate; 6kg of sodium thiosulfate; 3kg of trisodium phosphate; 0.5kg of sodium nitrite; 59.5kg of water; the components are prepared at 15-40 ℃ to prepare the heavy metal capture agent for the acidic sewage. When the heavy metal scavenger is used, the dosage of the heavy metal scavenger is calculated according to the molar content of various total metal ions in the acidic wastewater, and the dosage is 2-4 times of the total molar amount according to the chemical reaction formula.
Example 8, 35kg of a 60% sodium dimethyldithiophosphate solution; 25kg of sodium dimethyldithiocarbamate solution with the mass concentration of 30 percent; 20kg of sodium thiosulfate solution with the mass concentration of 30 percent; 3kg of trisodium phosphate solid; 0.5kg of sodium nitrite solid; 16.5kg of water; the components are prepared at 15-40 ℃ to prepare the heavy metal capture agent for the acidic sewage. When the heavy metal scavenger is used, the dosage of the heavy metal scavenger is calculated according to the molar content of various total metal ions in the acidic wastewater, and the dosage is 2-4 times of the total molar amount according to the chemical reaction formula.
The above description is only for the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the inventive concept thereof within the scope of the present invention.
Claims (5)
1. The acid sewage heavy metal catching agent is characterized by being prepared from the following raw materials in parts by weight: 12-21 parts of sodium dimethyldithiophosphate; 6-10 parts of sodium dimethyldithiocarbamate; 3-6 parts of sodium thiosulfate; 1-3 parts of trisodium phosphate; 0.2 to 0.5 percent of sodium nitrite; 59.5-77.8 parts of water.
2. The acid sewage heavy metal catching agent as claimed in claim 1, which is prepared from the following raw materials in parts by weight: sodium dimethyldithiophosphate 12; sodium dimethyldithiocarbamate 6; sodium thiosulfate 3; trisodium phosphate 1; 0.2 of sodium nitrite; and (5) water 59.5.
3. The acid sewage heavy metal catching agent as claimed in claim 1, which is prepared from the following raw materials in parts by weight: sodium dimethyldithiophosphate 21; sodium dimethyldithiocarbamate 10; sodium thiosulfate 6; trisodium phosphate 3; 0.5 of sodium nitrite; and (7) water 77.8.
4. The acid sewage heavy metal catching agent as claimed in claim 1, which is prepared from the following raw materials in parts by weight: sodium dimethyldithiophosphate 12; sodium dimethyldithiocarbamate 6; sodium thiosulfate 3; trisodium phosphate 1; 0.2 of sodium nitrite; and (7) water 77.8.
5. The acid sewage heavy metal catching agent as claimed in claim 1, which is prepared from the following raw materials in parts by weight: sodium dimethyldithiophosphate 21; sodium dimethyldithiocarbamate 10; sodium thiosulfate 6; trisodium phosphate 3; 0.5 of sodium nitrite; and (5) water 59.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010442546.8A CN111825191A (en) | 2020-05-22 | 2020-05-22 | Acid sewage heavy metal capture agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010442546.8A CN111825191A (en) | 2020-05-22 | 2020-05-22 | Acid sewage heavy metal capture agent |
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| Publication Number | Publication Date |
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| CN111825191A true CN111825191A (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010442546.8A Pending CN111825191A (en) | 2020-05-22 | 2020-05-22 | Acid sewage heavy metal capture agent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113184968A (en) * | 2021-05-27 | 2021-07-30 | 北京师范大学 | Method for treating waste acid and wastewater |
| CN114133012A (en) * | 2021-11-24 | 2022-03-04 | 白银新大孚科技化工有限公司 | Heavy metal ion collecting agent |
| CN114275868A (en) * | 2022-01-18 | 2022-04-05 | 长沙千河环保科技有限责任公司 | Heavy metal targeted remover and preparation method and application thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113184968A (en) * | 2021-05-27 | 2021-07-30 | 北京师范大学 | Method for treating waste acid and wastewater |
| CN114133012A (en) * | 2021-11-24 | 2022-03-04 | 白银新大孚科技化工有限公司 | Heavy metal ion collecting agent |
| CN114275868A (en) * | 2022-01-18 | 2022-04-05 | 长沙千河环保科技有限责任公司 | Heavy metal targeted remover and preparation method and application thereof |
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Application publication date: 20201027 |
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