CN102464398A - Method for treating zincky waste water - Google Patents
Method for treating zincky waste water Download PDFInfo
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- CN102464398A CN102464398A CN2011103193943A CN201110319394A CN102464398A CN 102464398 A CN102464398 A CN 102464398A CN 2011103193943 A CN2011103193943 A CN 2011103193943A CN 201110319394 A CN201110319394 A CN 201110319394A CN 102464398 A CN102464398 A CN 102464398A
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- iron
- aluminocopiapite
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- silicon
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Abstract
The invention discloses a method for treating zincky waste water. In the method, powdery substance is prepared through matching iron and aluminum misylite with unformed silicon dioxide in the mass ratio of 1-1 to 1-5, and then the substance is added into zincky waste water for treatment. The iron and aluminum misylite is prepared by adopting the method of using hydrochloric acid for acid leaching to yellow iron, wherein 2 to 8 percent of active sulfur dioxide is included; and the unformed silicon dioxide is nature active silica, comprises unformed silicon dioxide and a small amount of rock debris, and is prepared by silica volcano tuffite through hydrolyzation and dissociation tuffite. The invention has the characteristics of simple process flow, lower running cost, zero sludge production, high zinc removing effect and the like.
Description
Technical field
The present invention relates to a kind of treatment process of zinc-containing water, particularly handle the waste water of zinc concentration in 10～100mg/L scope, belong to field of waste water treatment in the environment protection.
Background technology
Zinc is the heavy metal resources of a kind of reserves on earth than horn of plenty.China's zinc resource reserves occupy the second place of the world, zinc resource and be widely used in modern industry production such as smelting, pharmacy and food service industry among.Zinc is the indispensable element of HUMAN HEALTH, and it extensively is present in human muscle and the bone, but content is very little, if serious consequence will take place excess.The discharging of zinc-containing water has serious harm to HUMAN HEALTH and industrial or agricultural activity; Have harm such as persistence, toxicity be big, seriously polluted; In case can not be behind the entering environment by biological degradation, great majority are participated in the food chain circulation, and finally accumulation in vivo; Destroy organism normal physiological Metabolic activity, be detrimental to health.Along with the day by day increase of the mankind to activities in production such as the exploitation of heavy metal, smelting, processing, the heavy metal wastewater thereby of generation is all to increase greatly in quantity or on the kind, has caused serious environmental to pollute and the wasting of resources.Therefore the improvement of zinc-containing water is still one in environmental protection field, the world has problem to be solved.
At present; Handle the difference of means both at home and abroad according to it; Can be divided into physico-chemical process and biological process, the form that in solution, exists according to zinc is different, and treatment process commonly used is divided two types: the first kind is to make the zine ion that is dissolved state in the waste water change insoluble heavy metal compound into; Remove from waste water through deposition or the floating method that goes up, concrete grammar has chemical precipitation method, ion exchange method, absorption method etc.; Second type is heavy metal in the waste water is concentrated under the condition that does not change its chemical form and to separate, and concrete grammar has reverse osmosis method, electroosmose process, evaporation concentration method.Problems such as these class methods can effectively be removed the zinc in the waste water, but it is big all to exist investment, and working cost is high, and the shipwreck after the improvement is with up to standard, and sludge yield is big.
For overcoming the deficiency of prior art; The invention provides a kind of treatment process of zinc-containing water, this inventive method technical process is simple, and running cost is low; Obvious processing effect; The entrapped zinc ionic concn is lower than the first discharge standard of national regulation less than 0.2mg/L in the water after primary treatment, and clearance is up to more than 99.9%; Do not have deposition and produce, can not cause secondary pollution, and all recyclable utilization of the MOX in water outlet and the waste water.
Summary of the invention
The objective of the invention is for overcoming the deficiency of prior art, provide a kind of the processing to contain the dezincification agent that zinc concentration is 10mg/L～100mg/L in the waste water, this dezincification agent technical process is simple; Running cost is low, obvious processing effect, after primary treatment in the water entrapped zinc ionic concn less than 0.2mg/L; Be lower than the first discharge standard of national regulation; Clearance does not have deposition and produces up to more than 99.9%, can not cause secondary pollution.
The technical scheme that the present invention adopts is: being acvator with " the dignified limestone in siliceous volcano " obtains a kind of iron content, aluminium of zinc, salt---the iron aluminocopiapite of mg ion with hydrochloric acid soln oxidation acid leaching pyrite; With this " the dignified limestone in the siliceous volcano " segregation that is hydrolyzed, obtain a kind of unformed silicon goods simultaneously, the two is mixed with certain proportion, can obtain novel zinc-containing waste water dezincification agent of the present invention.
The preparation method of iron aluminocopiapite is: be raw material with pyrite, the dignified limestone in siliceous volcano that adds ore amount 1/10～1/5 is an acvator, through pulverizing, preparing burden; Be slurrying in the aqueous hydrochloric acid of 100～200mg/L in mass concentration then; Maintenance pH＜2 are leached in preimpregnation, and solid-liquid separation, supernatant are heated; Concentrate, crystallization, obtain the iron aluminocopiapite.
The preparation method of amorphous silica is: " the dignified limestone in siliceous volcano " protolith of extraction is sieved, fetches water; Import the segregation that is hydrolyzed in the revolving drum machine; The ore discharge of cylindrical machine, silicon are starched in the rock slag and are separated, and silicon slurry part is through precipitating, dewater, be drying to obtain product.
Above-mentioned iron aluminocopiapite and the amorphous silica mass ratio according to 1:1～5 is cooperated, pulverize, sieve, obtain 100～120 order powdery substances.
Novel zinc-containing wastewater treatment method provided by the invention is iron aluminocopiapite, unformed silicon Synergist S-421 95 product; This product is cooperated by the mass ratio of 1:1～5 by two kinds of compositions of iron aluminocopiapite and unformed silicon and forms, and described iron aluminocopiapite contains the active silica of 91%～98% iron aluminocopiapite and 2%～9%; The iron aluminocopiapite is milk yellow, yellow-white, yellowish green light green, is the radiating fibers shape, warty crystallization, proportion 1.685, hardness 2; This material is soluble in water, and it is acid that its aqueous solution is, and the pH value is 1.15～1.98, and the increase with dissolving concentration is yellow, red-brown, blood red, black.Active silica is a capacitive silicon-dioxide, and it is dissolved in pH value of aqueous solution less than 5.6; Described unformed silicon is a kind of natural radioactivity silicon, mainly is unformedization silicon and a small amount of sulfide, feldspar and quartzy landwaste.
The application method of this compound dezincification agent is: the iron aluminocopiapite for preparing and two kinds of compositions of unformed silicon are re-dubbed the dezincification agent by the weight ratio of 1:1～5; Regulating the pH value is 9.5～11.5; At normal temperature and pressure slurrying, preimpregnation 2～15h, more this ore pulp is imported the protection against corrosion stirred leaching tank; Heat to 65～85 ℃, under normal pressure, continue to leach 30～50min, joining zinc content is in 10～100mg/L waste water, stirs after 15～45min, and water outlet can reach national grade one discharge standard, and clearance is more than 99.9%.
The invention has the beneficial effects as follows:
(1) technical process is simple, and running cost is low;
(2) obvious processing effect, the entrapped zinc ionic concn is lower than the first discharge standard of national regulation less than 0.2mg/L in the water after primary treatment, and clearance is up to more than 99.9%;
When (3) this dezincification agent contained heavy metal wastewater thereby such as zinc at acid, the alkali of handling various concentration, the heavy metal content such as zinc that all can guarantee water outlet stably were lower than the highest permission emission concentration of trade effluent and are near or below the concentration of Drinking Water matter standard code.
Embodiment
The preparation method of iron aluminocopiapite is: be raw material with pyrite, the dignified limestone in siliceous volcano that adds ore amount 1/10～1/5 is an acvator, through pulverizing, preparing burden; Be slurrying in the aqueous hydrochloric acid of 100～200mg/L in mass concentration then; Maintenance pH＜2 are leached in preimpregnation, and solid-liquid separation, supernatant are heated; Concentrate, crystallization, obtain the iron aluminocopiapite.
The preparation method of amorphous silica is: " the dignified limestone in siliceous volcano " protolith of extraction is sieved, fetches water; Import the segregation that is hydrolyzed in the revolving drum machine; The ore discharge of cylindrical machine, silicon are starched in the rock slag and are separated, and silicon slurry part is through precipitating, dewater, be drying to obtain product.
Above-mentioned iron aluminocopiapite and the amorphous silica mass ratio according to 1:1～5 is cooperated, pulverize, sieve, obtain 100～120 order powdery substances.
Novel zinc-containing wastewater treatment method provided by the invention is iron aluminocopiapite, unformed silicon Synergist S-421 95 product; This product is cooperated by the mass ratio of 1:1～5 by two kinds of compositions of iron aluminocopiapite and unformed silicon and forms, and described iron aluminocopiapite contains the active silica of 91%～98% iron aluminocopiapite and 2%～9%; The iron aluminocopiapite is milk yellow, yellow-white, yellowish green light green, is the radiating fibers shape, warty crystallization, proportion 1.685, hardness 2; This material is soluble in water, and it is acid that its aqueous solution is, and the pH value is 1.15～1.98, and the increase with dissolving concentration is yellow, red-brown, blood red, black.Active silica is a capacitive silicon-dioxide, and it is dissolved in pH value of aqueous solution less than 5.6; Described unformed silicon is a kind of natural radioactivity silicon, mainly is unformedization silicon and a small amount of sulfide, feldspar and quartzy landwaste.
The inventive method adopts once and directly throws in; The iron aluminocopiapite for preparing and two kinds of compositions of unformed silicon are re-dubbed the dezincification agent by the weight ratio of 1:1～5; Regulating the pH value is 9.5～11.5, at normal temperature and pressure slurrying, preimpregnation 2～15h, more this ore pulp is imported the protection against corrosion stirred leaching tank; Heat to 65～85 ℃, under normal pressure, continue to leach 30～50min, joining zinc content is in 10～100mg/L waste water, stirs after 15～45min, and water outlet can reach national grade one discharge standard, and clearance is more than 99.9%.
Instance 1
Iron aluminocopiapite and two kinds of compositions of unformed silicon are re-dubbed the dezincification agent by the weight ratio of 1:2, and regulating pH value is 9.5, at normal temperature and pressure slurrying, preimpregnation 3h, again with this ore pulp importing protection against corrosion stirred leaching tank; Heat to 65 ℃, under normal pressure, continue to leach 30min, joining zinc content is in the 100mg/L waste water, stirs after the 15min, and zinc content is 0.05mg/L in the water outlet, and clearance is 99.96%.
Instance 2
Iron aluminocopiapite and two kinds of compositions of unformed silicon are re-dubbed the dezincification agent by the weight ratio of 1:3, and regulating pH value is 10.0, at normal temperature and pressure slurrying, preimpregnation 2h, again with this ore pulp importing protection against corrosion stirred leaching tank; Heat to 69 ℃, under normal pressure, continue to leach 40min, joining zinc content is in the 58mg/L waste water, stirs after the 20min, and zinc content is 0.03mg/L in the water outlet, and clearance is 99.97%.
Instance 3
Iron aluminocopiapite and two kinds of compositions of unformed silicon are re-dubbed the dezincification agent by the weight ratio of 1:4, and regulating pH value is 11.0, at normal temperature and pressure slurrying, preimpregnation 2.5h, again with this ore pulp importing protection against corrosion stirred leaching tank; Heat to 75 ℃, under normal pressure, continue to leach 35min, joining zinc content is in the 10mg/L waste water, stirs after the 25min, and zinc content is 0.001mg/L in the water outlet, and clearance is 99.99%.
Claims (4)
1. the treatment process of a zinc-containing water is characterized in that: be made up of iron aluminocopiapite and amorphous silica, the iron aluminocopiapite is to be acvator with the dignified limestone in silicon-dioxide volcano, processes with hydrochloric acid acidleach pyrite; Amorphous silica is to obtain siliceous product with the dignified limestone in water treatment silicon-dioxide volcano, and iron aluminocopiapite and amorphous silica weight ratio are 1:1～5.
2. the treatment process of a kind of zinc-containing water according to claim 1 is characterized in that the method for preparing the iron aluminocopiapite is: be raw material with pyrite, the dignified limestone in siliceous volcano that adds ore amount 1/10～1/5 is an acvator; Through pulverize, batching, be slurrying in the aqueous hydrochloric acid of 100～200mg/L in mass concentration then, preimpregnation; Leach and keep pH＜2; Solid-liquid separation, supernatant are heated, and concentrate, and crystallization, obtain the iron aluminocopiapite.
3. the treatment process of removal zinc-containing water according to claim 1; The preparation method who it is characterized in that amorphous silica is: " the dignified limestone in siliceous volcano " protolith of extraction is sieved, fetches water; Import the segregation that is hydrolyzed in the revolving drum machine; The ore discharge of cylindrical machine, silicon are starched in the rock slag and are separated, and silicon slurry part is through precipitating, dewater, be drying to obtain product.
4. the treatment process of a kind of zinc-containing water according to claim 1 is characterized in that above-mentioned iron aluminocopiapite and the amorphous silica mass ratio according to 1:1～5 is cooperated, and pulverizes, sieves, and obtains 100～120 order powdery substances.
Priority Applications (1)
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| CN2011103193943A CN102464398A (en) | 2011-10-20 | 2011-10-20 | Method for treating zincky waste water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103193943A CN102464398A (en) | 2011-10-20 | 2011-10-20 | Method for treating zincky waste water |
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| CN102464398A true CN102464398A (en) | 2012-05-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976434A (en) * | 2012-12-11 | 2013-03-20 | 常州大学 | Method for treating lead-containing wastewater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043921A (en) * | 1989-12-29 | 1990-07-18 | 张明 | A kind of arsenic and heavy metal wastewater purificant |
| CA2112989A1 (en) * | 1993-03-08 | 1994-09-09 | Jong-Chan Lee | Compositions for Treating Waste Water Which Contains Heavy Metals |
| CN101386438A (en) * | 2008-10-30 | 2009-03-18 | 南京大学 | Method for processing heavy metal ion in water using amidocyanogen modified Fe3O4@SiO2 composite microparticle |
| CN101405223A (en) * | 2005-12-29 | 2009-04-08 | 微鼻技术公司 | Methods and compositions for removal of arsenic and heavy metals from water |
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2011
- 2011-10-20 CN CN2011103193943A patent/CN102464398A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043921A (en) * | 1989-12-29 | 1990-07-18 | 张明 | A kind of arsenic and heavy metal wastewater purificant |
| CA2112989A1 (en) * | 1993-03-08 | 1994-09-09 | Jong-Chan Lee | Compositions for Treating Waste Water Which Contains Heavy Metals |
| CN101405223A (en) * | 2005-12-29 | 2009-04-08 | 微鼻技术公司 | Methods and compositions for removal of arsenic and heavy metals from water |
| CN101386438A (en) * | 2008-10-30 | 2009-03-18 | 南京大学 | Method for processing heavy metal ion in water using amidocyanogen modified Fe3O4@SiO2 composite microparticle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976434A (en) * | 2012-12-11 | 2013-03-20 | 常州大学 | Method for treating lead-containing wastewater |
| CN102976434B (en) * | 2012-12-11 | 2014-01-15 | 常州大学 | Method for treating lead-containing wastewater |
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Application publication date: 20120523 |