CN104801527A - Method for treating arsenic contaminants by using material containing calcium and aluminum - Google Patents
Method for treating arsenic contaminants by using material containing calcium and aluminum Download PDFInfo
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- CN104801527A CN104801527A CN201410031306.3A CN201410031306A CN104801527A CN 104801527 A CN104801527 A CN 104801527A CN 201410031306 A CN201410031306 A CN 201410031306A CN 104801527 A CN104801527 A CN 104801527A
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Abstract
The present invention discloses a method for treating arsenic contaminants by using a material containing calcium and aluminum. The method comprises: grinding a material containing calcium and aluminum and arsenic contaminants into powder, weighing the material containing calcium and aluminum and the arsenic contaminants according to a dry weight ratio of 1:20-1:40, dispersing the arsenic contaminants in an aqueous solution, adding the material containing calcium and aluminum to the arsenic contaminant dispersing solution, stirring for 24 h at a room temperature, carrying out placing aging, and carrying out solid-liquid separation so as to obtain the arsenic or arsenate ion-fixed Ca-Al-LDHs capable of carrying out a stabilizing treatment on arsenic contaminants. The method of the present invention has the following advantages that: the used stabilizer material containing calcium and aluminum is cheap, easily-available and stable and is used for stably treating the arsenic contaminants, and the important economic, environmental and social significance is provided.
Description
Technical field
The method of system of the present invention a kind of calcic aluminum process arsenic pollutant, relates to calcic aluminum and effectively utilizes with arsenic dirty
Dye thing treatment process, belongs to changing rejected material to useful resource and arsenic pollutant stabilization technology field.
Background technology
Arsenic pollutes and produces greatly harm to environment, will to make to environment as its toxicant runs off from refuse to environment
Become serious pollution.Arsenic is a kind of metallics, can form a series of high toxicity compound, and arsenic can be absorbed by the body by skin, respiratory tract and alimentary canal, can cause neurasthenia syndrome, and DPN and mucocutaneous pathology, can cause lung cancer and cutaneum carcinoma etc.The discharge of arsenic makes the toxicity of waste water increase, the mishandling meeting of arsenic-containing waste causes serious arsenic to pollute, all once, found the poisoning caused because arsenic in water pollutes both at home and abroad, such as in recent years in ground generation As polluted soil event and surface water accidents such as Yunnan Province of China, Guangxi, Henan and Shandong, and near Miyazaki County, Japan Lu arsenic minerals of a specified duration and Shimane, German paddy copper mine resident's slow poisoning event.Various countries have formulated the discharge standard that arsenic pollutes one after another for this reason.Therefore, be badly in need of finding a kind of method processing arsenic and pollute, be strict controlled in below discharge standard.
Solidification and stabilization landfill is mainly comprised to the process treatment approach of arsenic-containing waste both at home and abroad, produce building materials and reclaim arsenic etc.The a series of stable curing arsenic pollutant technology of development in recent years, mainly by adding stabilizing agent, comprises molysite, as ferrous sulfate, iron sulfide filter bed or ferric sulfate, iron chloride, iron hydroxide etc. and liquid chlorine or bleaching powder etc.But the price of these stabilizing agents is higher, have important practical significance so find Cheap stabilizer to obtain larger economic benefit.
Solid-phase calcium aluminium discarded object, due to reasons such as processing costs, generally cannot melt back, have to bank up, oxidized gradually, thus polluted source, soil, environment.Be discarded object in need of immediate treatment as built pin material, it contains a large amount of calcium and aluminium, have as Cheap stabilizer for the treatment of arsenic pollutant may.But calcic aluminum exists strict requirement in application, after conducting extensive research, the present invention proposes: calcic aluminum uses according to certain match ratio, can do arsenic pollution plot, and process is simple, and equipment requirement is low, is easy to industrialization.
Thus, the present invention is directed to the problem of present stage calcic aluminium changing rejected material to useful resource application and arsenic pollutant urgent need advanced treating, invented a kind of method of stable process arsenic pollutant.The method takes full advantage of calcic aluminum to effective process of arsenic pollutant and mechanism of action, has science security and important economy, environmental and social benefits.
Summary of the invention
The object of the present invention is to provide a kind of stabilizing agent calcic aluminum used itself cheap and easy to get, stable, for the method that stable process arsenic pollutes.
To achieve these goals, the method for a kind of calcic aluminum process arsenic pollutant of the present invention, method has following technical process:
1) calcic aluminum and arsenic pollutant, by calcic aluminum, arsenic pollutant grind into powder;
2) calcic aluminum and arsenic pollutant take with dry weight 1:20-1:40 ratio;
3) claimed, arsenic pollutant has been distributed in the aqueous solution, subsequently calcic aluminum has been joined in arsenic pollutant dispersion liquid, stir 24-36h at ambient temperature, after placing ageing, carried out Separation of Solid and Liquid; The Ca-Al-LDHs of arsenic or arsenate ion can be fixed, Absorbable organic halogens process arsenic pollutant.
Described calcic aluminum, comprise calcic aluminum i ndustry refuse, calcic aluminium building pin material dolomite dust, alumina cement, wherein calcium aluminum ratio is 1:10 ~ 6:10, calcium aluminium gross mass mark 80%-90%.Described arsenic pollutant is mainly containing arsenic minerals slag; Wherein arsenic pollutant mainly exists with acid addition salt, is 15% ~ 20% containing arsenic mass fraction amount.
Beneficial effect of the present invention is:
The first, the calcium in calcic aluminum is to the precipitation of arsenate;
The second, calcium and aluminium in calcic aluminum, at System forming calcium aluminium-LDH, to the effect of arsenate (AsO4) 3-;
Wherein calcium aluminium-LDH is a kind of layered double-hydroxide (Layered double hydroxides), is by Brucite
(Mg (OH) 2) structure derives.When+2 valence metal ion parts in Brucite structure substitute by+3 valence metal ions time, laminate positively charged, at this moment must to compensate anion electrical to neutralize it for interlayer.In body series, arsenate or arsenous anion and different acid roots thereof can be used as and compensate anion to be inserted into interlayer electrical to neutralize it.
Within 1842, first Hochstetter has found natural hydrotalcite ore deposit from schist ore bed; Earlier 1900s people by
Start to study its structure in having found LDH to have catalytic action to addition reaction of hydrogen; The people such as Allmann in 1969, by measuring LDH mono-crystalline structures, confirm the layer structure of LDH first; After nineteen nineties, along with the extensive use of modern analytical technique and means of testing, the research of people to LDHs stuctures and properties deepens constantly.LDHs structure has the adjustable sex change of the chemical composition of main body laminate, the kind of interlayer object anion and the adjustable sex change of quantity, several outstanding features such as the grain size of intercalation assembly and distribution Modulatory character.
The Ca-Al-LDHs As removed in water body (V), one side A s (V) enters into the intermediate layer of hydrotalcite, also has the adsorption effect to arsenate on the other hand.And the As of load on calcium aluminium anionic clay, can be got off by CO32-ion elution, add the reusing of material.
3rd, aluminium ion is to the coagulating sedimentation effect of arsenate (AsO4) 3-.
Detailed description of the invention
Embodiment 1:
The method of a kind of calcic aluminum process arsenic pollutant of the present invention, method has following technical process:
1) calcic aluminum and arsenic pollutant, by calcic aluminum, arsenic pollutant grind into powder;
2) calcic aluminum and arsenic pollutant take with dry weight 1:20-1:40 ratio;
3) claimed, arsenic pollutant has been distributed in the aqueous solution, subsequently calcic aluminum has been joined in arsenic pollutant dispersion liquid, stir 24h at ambient temperature, after placing ageing, carried out Separation of Solid and Liquid; The Ca-Al-LDHs of arsenic or arsenate ion can be fixed, Absorbable organic halogens process arsenic pollutant.
Embodiment 2:
The method of a kind of calcic aluminum process arsenic pollutant of the present invention, method has following technical process:
1) calcic aluminum and arsenic pollutant, by calcic aluminum, arsenic pollutant grind into powder;
2) calcic aluminum and arsenic pollutant take with dry weight 1:20-1:40 ratio;
3) claimed, arsenic pollutant has been distributed in the aqueous solution, subsequently calcic aluminum has been joined in arsenic pollutant dispersion liquid, stir 30h at ambient temperature, after placing ageing, carried out Separation of Solid and Liquid; The Ca-Al-LDHs of arsenic or arsenate ion can be fixed, Absorbable organic halogens process arsenic pollutant.
Embodiment 3:
The method of a kind of calcic aluminum process arsenic pollutant of the present invention, method has following technical process:
1) calcic aluminum and arsenic pollutant, by calcic aluminum, arsenic pollutant grind into powder;
2) calcic aluminum and arsenic pollutant take with dry weight 1:20-1:40 ratio;
3) claimed, arsenic pollutant has been distributed in the aqueous solution, subsequently calcic aluminum has been joined in arsenic pollutant dispersion liquid, stir 36h at ambient temperature, after placing ageing, carried out Separation of Solid and Liquid; The Ca-Al-LDHs of arsenic or arsenate ion can be fixed, Absorbable organic halogens process arsenic pollutant.
The invention provides a kind of preparation method's thinking and method of method of calcic aluminum process arsenic pollutant, the method and access of this technical scheme of specific implementation is a lot, and the above is only the preferred embodiment of the present invention.
Claims (3)
1., by a method for calcic aluminum process arsenic pollutant, it is characterized in that, method has following technical process:
Calcic aluminum and arsenic pollutant, by calcic aluminum, arsenic pollutant grind into powder;
Calcic aluminum and arsenic pollutant take with dry weight 1:20-1:40 ratio;
Claim, arsenic pollutant has been distributed in the aqueous solution, subsequently calcic aluminum has been joined in arsenic pollutant dispersion liquid, stir 24-36h at ambient temperature, after placing ageing, carried out Separation of Solid and Liquid; The Ca-Al-LDHs of arsenic or arsenate ion can be fixed, Absorbable organic halogens process arsenic pollutant.
2. the method with calcic aluminum process arsenic pollutant, it is characterized in that, described calcic aluminum, comprise calcic aluminum i ndustry refuse, calcic aluminium building pin material dolomite dust, alumina cement, wherein calcium aluminum ratio is 1:10 ~ 6:10, calcium aluminium gross mass mark 80%-90%.
3. by a method for calcic aluminum process arsenic pollutant, it is characterized in that, described arsenic pollutant is mainly containing arsenic minerals slag; Wherein arsenic pollutant mainly exists with acid addition salt, is 15% ~ 20% containing arsenic mass fraction amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410031306.3A CN104801527A (en) | 2014-01-23 | 2014-01-23 | Method for treating arsenic contaminants by using material containing calcium and aluminum |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410031306.3A CN104801527A (en) | 2014-01-23 | 2014-01-23 | Method for treating arsenic contaminants by using material containing calcium and aluminum |
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| CN104801527A true CN104801527A (en) | 2015-07-29 |
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| CN201410031306.3A Withdrawn CN104801527A (en) | 2014-01-23 | 2014-01-23 | Method for treating arsenic contaminants by using material containing calcium and aluminum |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108430658A (en) * | 2015-12-25 | 2018-08-21 | 株式会社神户制钢所 | The insoluble material of arsenic and insoluble method |
| CN108479689A (en) * | 2018-04-23 | 2018-09-04 | 中国环境科学研究院 | A kind of adsorbent of removal arsenic in waste water acid ion |
| CN109896563A (en) * | 2019-04-04 | 2019-06-18 | 四川大学 | A kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates |
| CN110918611A (en) * | 2019-12-10 | 2020-03-27 | 中南大学 | Treatment method for stabilizing/curing arsenic sulfide slag based on Friedel salt |
-
2014
- 2014-01-23 CN CN201410031306.3A patent/CN104801527A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108430658A (en) * | 2015-12-25 | 2018-08-21 | 株式会社神户制钢所 | The insoluble material of arsenic and insoluble method |
| CN108479689A (en) * | 2018-04-23 | 2018-09-04 | 中国环境科学研究院 | A kind of adsorbent of removal arsenic in waste water acid ion |
| CN109896563A (en) * | 2019-04-04 | 2019-06-18 | 四川大学 | A kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates |
| CN110918611A (en) * | 2019-12-10 | 2020-03-27 | 中南大学 | Treatment method for stabilizing/curing arsenic sulfide slag based on Friedel salt |
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Application publication date: 20150729 |