CN114702164A - Method for treating acidic arsenic-containing wastewater by using boric sludge - Google Patents
Method for treating acidic arsenic-containing wastewater by using boric sludge Download PDFInfo
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- CN114702164A CN114702164A CN202210379242.0A CN202210379242A CN114702164A CN 114702164 A CN114702164 A CN 114702164A CN 202210379242 A CN202210379242 A CN 202210379242A CN 114702164 A CN114702164 A CN 114702164A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
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- 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
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- Engineering & Computer Science (AREA)
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Abstract
The invention belongs to the field of solid waste comprehensive treatment and environmental protection. The invention provides a method for treating acidic arsenic-containing wastewater by using boric sludge. Mixing the boric sludge solution and the acidic arsenic-containing wastewater, and then reacting to obtain a solution 1; mixing the solution 1 and the boron mud solution, and then carrying out arsenic precipitation reaction to obtain magnesium-rich liquid; and mixing the magnesium-rich liquid and the lime milk, and then reacting to complete treatment. The method provided by the invention utilizes the boric sludge to remove arsenic in the acidic arsenic-containing wastewater, fully utilizes the environmental protection concept of treating waste with waste, removes the toxic element arsenic in the arsenic-containing wastewater while solving the current situation of piling up a large amount of boric sludge, realizes low-cost purification of the arsenic-containing wastewater, and generates a relatively pure magnesium salt solution capable of preparing magnesium-containing compounds. The preparation method provided by the invention realizes the comprehensive utilization of valuable elements in the boric sludge, successfully removes harmful element arsenic in the acidic arsenic-containing wastewater, and realizes wastewater purification.
Description
Technical Field
The invention relates to the technical field of solid waste comprehensive treatment and environmental protection, in particular to a method for treating acidic arsenic-containing wastewater by using boric sludge.
Background
As a protosome poison, arsenic exists in common copper, lead, zinc and tin sulfide concentrate and enters wastewater in the production processes of chemical industry, smelting, nonferrous metallurgy and the like. Since arsenic pollution is irreversible to the destruction of the ecological environment, the maximum allowable emission depth of total arsenic has been reduced from 0.5mg/L to 0.1mg/L in recent environmental requirements. At present, the domestic and foreign methods for treating arsenic-containing wastewater mainly comprise a chemical precipitation method, a biological method, an adsorption method, a membrane separation method, an ion exchange method and the like, wherein the chemical precipitation method is the most commonly used arsenic removal method for enterprises, and the purpose of purifying and removing arsenic is achieved by using insoluble compounds formed by arsenic and various metal ions (iron, calcium, aluminum, magnesium and the like).
The boric sludge is produced by plate-and-frame pressing after the filtration link in the production process of the borax, about 6 tons of boric sludge are produced per 1 ton of borax produced, the discharge amount is extremely large, the boric sludge particles are usually fine, and about 80% of the particles can pass through a 200-mesh sieve. The pH value of the boric sludge is about 10-12. Over the years, the messy stacking of a large amount of boric sludge not only occupies a large amount of land and wastes land resources, but also pollutes a large number of farmlands and surface water due to mixed alkali liquor formed in rainy and snowy weather, and long-term infiltration and dissolution will influence underground water, which will cause great influence on surrounding resident life and agricultural production and extremely serious damage to ecological environment. Although the comprehensive utilization of boron sludge in China is wide, including preparation of refractory materials, building materials, microcrystalline glass, fertilizers, production of light magnesium carbonate, magnesium oxide and the like, the comprehensive utilization of boron sludge is basically performed around effective utilization of magnesium in boron sludge, and utilization of other elements (iron, calcium, silicon and the like) is ignored. Therefore, the key to really solving the environmental problem caused by the solid waste of the boron mud is to find a method which can solve the problem of environmental pollution caused by the boron mud and comprehensively utilize valuable components in the boron mud.
Disclosure of Invention
The invention aims to provide a novel treatment method, and provides a method for treating acidic arsenic-containing wastewater by using boric sludge.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a method for treating acidic arsenic-containing wastewater by using boric sludge, which comprises the following steps:
(1) mixing the boric sludge solution and the acidic arsenic-containing wastewater, and then reacting to obtain a solution 1;
(2) mixing the solution 1 and the boron mud solution, and then carrying out arsenic precipitation reaction to obtain magnesium-rich liquid;
(3) and mixing the magnesium-rich liquid and the lime milk, and then reacting to complete treatment.
Preferably, the pH value of the boron mud solution and the acidic arsenic-containing wastewater mixed in the step (1) is 1.5-1.8.
Preferably, in the boron slurry solution in the step (1), the mass fraction of the components with the particle size of less than or equal to 325 meshes in the boron slurry is more than or equal to 80%;
the concentration of the boric sludge solution is 30-50%.
Preferably, in the step (1), the content of arsenic in the acidic arsenic-containing wastewater is 1-10 g/L, and the pH value of the acidic arsenic-containing wastewater is less than or equal to 1.
Preferably, the reaction time in the step (1) is 50-70 min.
Preferably, the pH value of the solution 1 and the boric sludge solution after mixing in the step (2) is 4-5.
Preferably, the concentration of the boric sludge solution in the step (2) is 30-50%.
Preferably, the time of the arsenic precipitation reaction in the step (2) is 80-100 min.
Preferably, the mass concentration of the lime milk in the step (3) is 20-25%;
and (4) mixing the magnesium-rich liquid and the lime milk, and adjusting the pH value to 7-8.
Preferably, the reaction time in the step (3) is 20-40 min.
The invention provides a method for treating acidic arsenic-containing wastewater by using boric sludge. Mixing the boric sludge solution and the acidic arsenic-containing wastewater, and then reacting to obtain a solution 1; mixing the solution 1 and the boron mud solution, and then carrying out arsenic precipitation reaction to obtain magnesium-rich liquid; and mixing the magnesium-rich liquid and the lime milk, and then reacting to complete treatment. According to the method provided by the invention, while the boron mud is used for precipitating and removing the arsenic element, the magnesium element in the boron mud is also used, so that a relatively pure magnesium salt solution is obtained, and the magnesium salt solution can be used for preparing a raw material of a magnesium-containing compound.
The method provided by the invention utilizes the boric sludge to remove arsenic in the acidic arsenic-containing wastewater, fully utilizes the environmental protection concept of treating waste with waste, removes the toxic element arsenic in the arsenic-containing wastewater while solving the current situation of piling up a large amount of boric sludge, realizes low-cost purification of the arsenic-containing wastewater, and generates a relatively pure magnesium salt solution capable of preparing magnesium-containing compounds. The preparation method provided by the invention solves a series of environmental problems caused by the bulk stockpiling of the boron sludge, realizes the comprehensive utilization of valuable elements in the boron sludge, successfully removes harmful element arsenic in the acidic arsenic-containing wastewater, and realizes the purification of the wastewater. The method has the advantages of simple process operation, ecological benefit, environmental benefit, economic benefit and social benefit, and wide process applicability.
Detailed Description
The invention provides a method for treating acidic arsenic-containing wastewater by using boric sludge, which comprises the following steps:
(1) mixing the boric sludge solution and the acidic arsenic-containing wastewater, and then reacting to obtain a solution 1;
(2) mixing the solution 1 and the boron mud solution, and then carrying out arsenic precipitation reaction to obtain magnesium-rich liquid;
(3) and mixing the magnesium-rich liquid and the lime milk, and then reacting to complete treatment.
In the invention, before the boron mud is prepared into the solution, crushing, grinding, wet screening, impurity removal and drying are required; the boric sludge has strong alkalinity, and the pH value of the boric sludge is adjusted after the boric sludge is mixed with the acidic arsenic-containing wastewater.
In the invention, the boric sludge is crushed and ground until the particle size meets the requirement, and then the subsequent treatment is carried out; after the boron mud is treated, soluble salts and boron in the boron mud can be partially removed.
In the invention, the pH value of the boron mud solution and the acidic arsenic-containing wastewater after mixing in the step (1) is preferably 1.5 to 1.8, more preferably 1.6 to 1.7, and even more preferably 1.63 to 1.67.
In the present invention, the mass fraction of the component having a particle size of 325 mesh or less in the boric sludge solution in step (1) is preferably 80% or more, more preferably 85% or more, and still more preferably 90% or more.
In the invention, the concentration of the boric sludge solution is preferably 30-50%, more preferably 35-45%, and even more preferably 38-42%.
In the invention, the acidic arsenic-containing wastewater is from arsenic-containing sulfuric acid wastewater generated in the processes of preparing acid from pyrite (containing arsenic) and smelting nonferrous metals, and mainly contains heavy metal ions such as arsenic, copper, lead, zinc, cadmium and the like and elements such as fluorine, sulfur and the like.
In the invention, the content of arsenic in the acidic arsenic-containing wastewater in the step (1) is preferably 1-10 g/L, more preferably 2-8 g/L, and even more preferably 4-6 g/L; the pH of the acidic arsenic-containing wastewater is preferably 1 or less, more preferably 0.8 or less, and still more preferably 0.6 or less.
In the invention, the reaction time in the step (1) is preferably 50-70 min, more preferably 55-65 min, and even more preferably 58-62 min.
In the present invention, after the reaction in the step (1) is completed, the solution 1 is obtained by filtration.
In the invention, the solution 1 is an arsenic-containing solution obtained by dissolving iron oxide, aluminum oxide, calcium oxide, magnesium oxide and other components in boric sludge with waste acid.
In the invention, the pH value of the solution 1 and the boric sludge solution after mixing in the step (2) is preferably 4-5, more preferably 4.2-4.8, and even more preferably 4.4-4.6.
In the invention, the concentration of the boric sludge solution in the step (2) is preferably 30-50%, more preferably 35-45%, and even more preferably 38-42%.
In the invention, the time for arsenic precipitation reaction in the step (2) is preferably 80-100 min, more preferably 85-95 min, and even more preferably 88-92 min.
In the invention, arsenic in the solution is deposited through arsenic deposition reaction, and arsenic slag is removed through filtration to complete the removal of arsenic; at the moment, magnesium in the boron mud is distributed in the solution to form a magnesium-rich solution, wherein the main component of the magnesium-rich solution is magnesium sulfate solution, the arsenic content is preferably less than or equal to 0.5mg/L, more preferably less than or equal to 0.45mg/L, and more preferably less than or equal to 0.4 mg/L; the magnesium-rich liquid also contains heavy metal ions such as copper, lead, zinc, cadmium and the like which need subsequent treatment.
In the invention, the mass concentration of the lime milk in the step (3) is preferably 20-25%, more preferably 21-24%, and even more preferably 22-23%.
In the invention, after the magnesium-rich liquid and the lime milk are mixed, the pH is preferably adjusted to 7-8, more preferably 7.2-7.8, and even more preferably 7.4-7.6.
In the invention, the reaction time in the step (3) is preferably 20 to 40min, more preferably 25 to 35min, and even more preferably 28 to 32 min.
In the invention, after the magnesium-rich liquid and the lime cream are mixed, heavy metal ions in the magnesium-rich liquid can be effectively purified, and a relatively pure magnesium salt solution is obtained after filtration for subsequent utilization; the content of magnesium in the magnesium salt solution is preferably 27.5-45 g/L, more preferably 30-42.5 g/L, and even more preferably 35-37.5 g/L.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
In the present invention, the chemical composition of boron sludge in the examples is shown in table 1.
TABLE 1 chemical composition of boron sludge
| Composition of | B2O3 | SiO2 | MgO | Fe2O3 | CaO | Al2O3 |
| Content (%) | 2.45 | 22.6 | 50.5 | 12.6 | 6.7 | 3.2 |
In the present invention, the composition of the acidic arsenic-containing wastewater in examples is shown in Table 2.
TABLE 2 composition of acidic arsenic-containing wastewater
| Composition (I) | Cu(g/L) | Pb(mg/L) | As(mg/L) | Zn(mg/L) | Fe(mg/L) | SO4 2-(g/L) | pH |
| Content (c) of | 0.32 | 4.56 | 1676.7 | 262.16 | 1732 | 68.5 | 1.0 |
Example 1
Crushing and grinding the boron mud, wherein the mass fraction of components with the particle size of less than or equal to 325 meshes in the boron mud is 85%; and then carrying out wet screening, impurity removal and drying to prepare a boron mud solution with the concentration of 30%, adding the boron mud solution into the acidic arsenic-containing wastewater, adjusting the pH value of the wastewater to be 1.5, reacting for 60min, and filtering to obtain a solution 1.
Adding a boron mud solution with the concentration of 30% into the solution 1, adjusting the pH value of the solution 1 to be 4, reacting for 90min, and filtering to obtain arsenic slag and a magnesium-rich liquid to finish removal of arsenic; the arsenic content in the magnesium-rich liquid is 0.49 mg/L.
Adding lime milk with the concentration of 20% into the magnesium-rich liquid, adjusting the pH value of the magnesium-rich liquid to be 7, reacting for 30min, and filtering to obtain a magnesium salt solution, wherein the content of magnesium is 35g/L, heavy metal ions such as copper, lead, zinc, cadmium and the like are not detected, and the magnesium salt solution can be used as a raw material for preparing various magnesium-containing compounds.
Example 2
Crushing and grinding the boron mud, wherein the mass fraction of components with the particle size of less than or equal to 325 meshes in the boron mud is 90%; and then carrying out wet screening, impurity removal and drying to prepare a boron mud solution with the concentration of 40%, adding the boron mud solution into the acidic arsenic-containing wastewater, adjusting the pH value of the wastewater to be 1.7, reacting for 50min, and filtering to obtain a solution 1.
Adding a boron mud solution with the concentration of 40% into the solution 1, adjusting the pH value of the solution 1 to be 4.5, reacting for 100min, and filtering to obtain arsenic slag and a magnesium-rich liquid to finish removal of arsenic; the arsenic content in the magnesium-rich liquid is 0.37 mg/L.
Adding lime milk with the concentration of 23% into the magnesium-rich liquid, adjusting the pH value of the magnesium-rich liquid to 7.5, reacting for 35min, and filtering to obtain a magnesium salt solution, wherein the content of magnesium is 42g/L, heavy metal ions such as copper, lead, zinc, cadmium and the like are not detected, and the magnesium salt solution can be used as a raw material for preparing various magnesium-containing compounds.
Example 3
Crushing and grinding the boron mud, wherein the mass fraction of components with the particle size of less than or equal to 325 meshes in the boron mud is 95%; and then carrying out wet screening, impurity removal and drying to prepare a boron mud solution with the concentration of 50%, adding the boron mud solution into the acidic arsenic-containing wastewater, adjusting the pH value of the wastewater to be 1.8, reacting for 70min, and filtering to obtain a solution 1.
Adding a boron mud solution with the concentration of 50% into the solution 1, adjusting the pH value of the solution 1 to be 5.0, reacting for 80min, and filtering to obtain arsenic slag and a magnesium-rich liquid to finish removal of arsenic; the arsenic content in the magnesium-rich liquid is 0.3 mg/L.
Adding lime milk with the concentration of 25% into the magnesium-rich liquid, adjusting the pH value of the magnesium-rich liquid to 8.0, reacting for 25min, and filtering to obtain a magnesium salt solution, wherein the content of magnesium is 33g/L, and heavy metal ions such as copper, lead, zinc, cadmium and the like are not detected, so that the magnesium salt solution can be used as a raw material for preparing various magnesium-containing compounds.
From the above embodiments, the invention provides a method for treating acidic arsenic-containing wastewater by using boric sludge. Mixing the boric sludge solution and the acidic arsenic-containing wastewater, and then reacting to obtain a solution 1; mixing the solution 1 and the boron mud solution, and then carrying out arsenic precipitation reaction to obtain magnesium-rich liquid; and mixing the magnesium-rich liquid and the lime milk, and then reacting to complete treatment. The method provided by the invention utilizes the boric sludge to remove arsenic in the acidic arsenic-containing wastewater, fully utilizes the environmental protection concept of 'treating waste with waste', solves the current situation of piling up a large amount of boric sludge, removes the toxic element arsenic in the arsenic-containing wastewater, realizes low-cost purification of the arsenic-containing wastewater, generates a relatively pure magnesium salt solution capable of preparing magnesium-containing compounds, and does not detect heavy metal ions such as copper, lead, zinc, cadmium and the like. The preparation method provided by the invention solves a series of environmental problems caused by the bulk stockpiling of the boron sludge, realizes the comprehensive utilization of valuable elements in the boron sludge, successfully removes harmful element arsenic in the acidic arsenic-containing wastewater, and realizes the purification of the wastewater.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A treatment method for acidic arsenic-containing wastewater by using boric sludge is characterized by comprising the following steps:
(1) mixing the boric sludge solution and the acidic arsenic-containing wastewater, and then reacting to obtain a solution 1;
(2) mixing the solution 1 and the boron mud solution, and then carrying out arsenic precipitation reaction to obtain magnesium-rich liquid;
(3) and mixing the magnesium-rich liquid and the lime milk, and then reacting to complete treatment.
2. The treatment method according to claim 1, wherein the pH value of the boron sludge solution and the acidic arsenic-containing wastewater mixed in the step (1) is 1.5-1.8.
3. The treatment method according to claim 1 or 2, wherein in the boron sludge solution in the step (1), the mass fraction of components with the particle size of 325 meshes or less in the boron sludge is 80% or more;
the concentration of the boric sludge solution is 30-50%.
4. The treatment method according to claim 3, wherein the arsenic content in the acidic arsenic-containing wastewater in the step (1) is 1-10 g/L, and the pH value of the acidic arsenic-containing wastewater is less than or equal to 1.
5. A treatment method according to claim 1 or 4, wherein the reaction time in step (1) is 50-70 min.
6. The treatment method according to claim 5, wherein the pH value of the solution 1 and the boric sludge solution after mixing in the step (2) is 4-5.
7. A treatment method according to claim 4 or claim 6, wherein the concentration of the boron sludge solution in step (2) is 30-50%.
8. The treatment method according to claim 7, wherein the time for arsenic precipitation reaction in the step (2) is 80-100 min.
9. The treatment method according to claim 1 or 8, wherein the mass concentration of the lime milk in the step (3) is 20-25%;
and (4) mixing the magnesium-rich liquid and the lime milk, and adjusting the pH value to 7-8.
10. The treatment method according to claim 9, wherein the reaction time in the step (3) is 20-40 min.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549876A (en) * | 2009-05-15 | 2009-10-07 | 东北大学 | Method for producing boric acid and co-produce magnesium hydrate and calcium sulphate by utilizing boron-rich slag |
| CN107840480A (en) * | 2016-09-20 | 2018-03-27 | 张家港格林台科环保设备有限公司 | A kind of method for waste acid of being given up using industrial ferrous contained useless mud processing containing arsenic |
| CN109078962A (en) * | 2018-08-30 | 2018-12-25 | 西北矿冶研究院 | Combined treatment method of arsenic-containing acidic wastewater, red mud and carbide slag |
| CN109607947A (en) * | 2018-12-25 | 2019-04-12 | 贵州省分析测试研究院 | A method of removing coal washery heavy metal in waste water arsenic |
| CN113149044A (en) * | 2021-04-19 | 2021-07-23 | 东北大学 | Method for preparing magnesium salt by adopting boric sludge |
-
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- 2022-04-12 CN CN202210379242.0A patent/CN114702164B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549876A (en) * | 2009-05-15 | 2009-10-07 | 东北大学 | Method for producing boric acid and co-produce magnesium hydrate and calcium sulphate by utilizing boron-rich slag |
| CN107840480A (en) * | 2016-09-20 | 2018-03-27 | 张家港格林台科环保设备有限公司 | A kind of method for waste acid of being given up using industrial ferrous contained useless mud processing containing arsenic |
| CN109078962A (en) * | 2018-08-30 | 2018-12-25 | 西北矿冶研究院 | Combined treatment method of arsenic-containing acidic wastewater, red mud and carbide slag |
| CN109607947A (en) * | 2018-12-25 | 2019-04-12 | 贵州省分析测试研究院 | A method of removing coal washery heavy metal in waste water arsenic |
| CN113149044A (en) * | 2021-04-19 | 2021-07-23 | 东北大学 | Method for preparing magnesium salt by adopting boric sludge |
Non-Patent Citations (1)
| Title |
|---|
| 张守荣主编: "《人体健康与环保行动》", 31 July 2009, 中国戏剧出版社 * |
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