CN102247829A - Method for preparing rectorite self-assembled bismuth vanadate water treatment agent - Google Patents
Method for preparing rectorite self-assembled bismuth vanadate water treatment agent Download PDFInfo
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- CN102247829A CN102247829A CN2011101268593A CN201110126859A CN102247829A CN 102247829 A CN102247829 A CN 102247829A CN 2011101268593 A CN2011101268593 A CN 2011101268593A CN 201110126859 A CN201110126859 A CN 201110126859A CN 102247829 A CN102247829 A CN 102247829A
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- rectorite
- water treatment
- treatment agent
- bismuth
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention relates to a method for preparing a rectorite self-assembled bismuth vanadate water treatment agent, which comprises the following steps of: (1) adding bismuth salt and a stabilizer into phosphate buffer, and stirring for 15 to 60 minutes to form suspension; and dissolving metavanadate in the phosphate buffer, and adding into the suspension to form transparent solution; and (2) regulating the pH value of the transparent solution to be between 4.5 and 9 by using alkaline solution, adding rectorite in a mass ratio of the rectorite to the bismuth salt in the step (1) of 5:1-20:1 at the temperature of between 20 and 100 DEG C, performing reflux reaction for 6 to 24 hours with stirring, and filtering and baking a product. The method is low in cost and simple; and the prepared water treatment agent is suitable for the advanced treatment of multiple kinds of wastewater, is environment-friendly, avoids secondary pollution, can overcome the defects of the conventional bismuth-based water treatment agent, has a good water treatment effect and a good application prospect, and can be recycled.
Description
Technical field
The invention belongs to the preparation field of water treatment agent, particularly a kind of preparation method of rectorite self assembly pucherite water treatment agent.
Background technology
The water in the whole world only about 10% is directly for human used.Lion's share, 70% is used for agricultural, and remaining 20% is industrial.The blowdown of China is about 20% of the whole world, and it has to 5% the fresh water in the whole world.Therefore, the contaminated solution problem puts on the agenda.In textile printing and dyeing, leather, paper industry process, used contaminated environment and harmful auxiliary agent in a large number, these auxiliary agents are the contaminated environment with the form discharging of liquid mostly, biological degradability is poor, toxicity is big, free formaldehyde content height, the content overproof of heavy metal ion.Wherein, the printing and dyeing dressing becomes water heavy polluter especially undisputedly.From starching begin to destarch, wash, scouring and bleaching, mercerising, then dyeing and printing, may also need coating, all relate to washing by this flow process per pass operation, and the every kg of material of per pass operation needs the 20L water consumption.The result is the water consumption of every kilogram of raw cotton in the dressing process nearly 200L that adds up.When the in men's style shirt customization back of a standard when shopper window is showed, above 2000L water production and processing it the time used up (cloth: cotton textiles, 125g/m).
The method of the processing waste water that uses mainly contains at present: physical partition method, biological degradation method, chemical decomposition method, but all there is certain limitation in these methods, are unfavorable for sustainable development.Thereby that people begin to be devoted to develop is efficient, low energy consumption, applied widely and the pollutant clearance technique of deep oxidation ability arranged.In recent years, a lot of scholars are with TiO
2Be used for photocatalytic degradation water organic pollution, but because its greater band gap (3.2eV) only has response in ultraviolet light range, and BiVO
4Have photocatalytic activity in the visible region, can degradable organic pollutant, to reach the purpose that processing environment pollutes.
Summary of the invention
Technical problem to be solved by this invention provides a kind of preparation method of rectorite self assembly pucherite water treatment agent, and this method is with low cost, and technology is simple; The water treatment agent of preparation is applicable to the advanced treating of various waste water, environmental protection non-secondary pollution.
The preparation method of a kind of rectorite self assembly pucherite water treatment agent of the present invention comprises:
(1) bismuth salt, stabilizing agent are joined in the phosphate buffer, stir 15～60min, form suspension; Metavanadate is dissolved in phosphate buffer, joins then in the suspension, form clear solution; Wherein the mol ratio of bismuth salt, stabilizing agent and inclined to one side alum salts is 0.01～0.15: 0.01～0.05: 0.01～0.15;
(2) regulate pH value to 4.5～9 of above-mentioned clear solution with alkaline solution, bismuth salt mass ratio is 5: 1～20: 1 a rectorite in 20～100 ℃ of addings and step (1), and stirring and refluxing reaction 6-24h filters, bakes product, promptly.
Bismuth salt in the described step (1) is bismuth nitrate, waltherite, bismuth chloride or bismuth acetate.
Stabilizing agent in the described step (1) is disodium ethylene diamine tetraacetate, tetrasodium ethylenediamine tetraacetate, gluconic acid sodium salt or BTCA.
Metavanadate in the described step (1) is sodium metavanadate, potassium metavanadate or ammonium metavanadate.
Phosphate buffer in the described step (1) is by 0.025～0.05mol/L sodium dihydrogen phosphate and the solution composition of 0.05-0.1mol/L dibastic sodium phosphate.
Alkaline solution in the described step (2) is the NaOH of 0.5～1.5mol/L or the aqueous solution of potassium hydroxide.
Baking temperature in the described step (2) is 150～280 ℃, and the time of baking is 2～4h.
Rectorite has special interlayer characteristic as a kind of mineral clay, compares with active carbon, and by the interlayer ion exchange, can be at its interlayer self assembly BiVO
4Particulate is prepared into loaded catalyst.This loaded photocatalyst can improve the dispersiveness of photochemical catalyst, is beneficial to recycle and reuse.And because the aboundresources of rectorite, cheap.The present invention utilize rectorite porous, high adsorption capacity, with characteristics and BiVO such as water is easily separated
4Photocatalytic activity combine, with nanometer BiV0
4Loading on the rectorite of success, be prepared into can be suspended in the waste water and can be smoothly and moisture from the visible-light photocatalysis material of high catalytic activity, and be applied to the advanced treating of waste water, can realize water middle and high concentration organic pollution oxidation removal, rather than transfer to other places, be the technology of an environment-friendly type.
Beneficial effect
(1) the present invention is with low cost, and technology is simple, to equipment require lowly, operability is good;
(2) water treatment agent of the present invention preparation can be removed water middle and high concentration organic pollution, is applicable to the advanced treating of various waste water, the environmental protection non-secondary pollution, and have antibiotic, deodorizing, can adsorb advantage such as other heavy metal ion; Can overcome the deficiency of existing bismuthino water treatment agent, water treatment is effective, can be recycled, and has a good application prospect.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
(1) bismuth nitrate, disodium ethylene diamine tetraacetate are joined in the phosphate buffer, stir 15min, form suspension; Metavanadate sodium is dissolved in the phosphate buffer, dropwise joins in the described suspension, form clear solution; Wherein the mol ratio of bismuth salt, stabilizing agent and inclined to one side alum salts is 0.01: 0.01: 0.01, is by 0.025mol/L sodium dihydrogen phosphate and the solution composition of 0.05mol/L dibastic sodium phosphate in the phosphate buffer;
(2) be that the pH value that the sodium hydrate aqueous solution of 0.5mol/L is regulated above-mentioned clear solution is 4.5 with concentration, add rectorite down at 20 ℃ then, stir, backflow 6h filters, yellow product, at last products therefrom is baked 2h in 150 ℃, get final product; Wherein the weight ratio of bismuth salt and rectorite is 1: 5.
Embodiment 2
(1) waltherite, gluconic acid sodium salt are joined in the phosphate buffer, stir 35min, form suspension; The metavanadate ammonium is dissolved in the phosphate buffer, dropwise joins in the described suspension, form clear solution; Wherein the mol ratio of bismuth salt, stabilizing agent and inclined to one side alum salts is 0.06: 0.04: 0.01, is by 0.03mol/L sodium dihydrogen phosphate and the solution composition of 0.08mol/L dibastic sodium phosphate in the phosphate buffer;
(2) be that the pH value that the potassium hydroxide aqueous solution of 1mol/L is regulated above-mentioned clear solution is 7 with concentration, add rectorite down at 80 ℃ then, stir, backflow 15h filters, yellow product, at last products therefrom is baked 3h in 210 ℃, get final product; Wherein the weight ratio of bismuth salt and rectorite is 1: 14.
Embodiment 3
(1) bismuth acetate, BTCA are joined in the phosphate buffer, stir 60min, form suspension; Metavanadate sodium is dissolved in the phosphate buffer, dropwise joins in the described suspension, form clear solution; Wherein the mol ratio of bismuth salt, stabilizing agent and inclined to one side alum salts is 0.15: 0.05: 0.15, forms solution by 0.05mol/L sodium dihydrogen phosphate and 0.1mol/L dibastic sodium phosphate in the phosphate buffer;
(2) be that the pH value that the sodium hydrate aqueous solution of 1.5mol/L is regulated above-mentioned clear solution is 9 with concentration, add rectorite down at 100 ℃ then, stir, backflow 24h filters, yellow product, at last products therefrom is baked 4h in 280 ℃, get final product; Wherein the weight ratio of bismuth salt and rectorite is 1: 20.
Is to handle object with the dyeing waste water, adds the water treatment agent of embodiment 1～3 gained of different concentration amounts respectively in waste water, through behind 6 hours solar radiations, water treatment agent is as shown in the table to the decolorization of dyeing rate:
| Percent of decolourization | The COD clearance | |
| Embodiment 1 | 98.7％ | 89.4％ |
| Embodiment 2 | 95.8％ | 91.9％ |
| Embodiment 3 | 99.6％ | 93.1％ |
Claims (7)
1. the preparation method of a rectorite self assembly pucherite water treatment agent comprises:
(1) bismuth salt, stabilizing agent are joined in the phosphate buffer, stir 15～60min, form suspension; Metavanadate is dissolved in phosphate buffer, joins then in the suspension, form clear solution; Wherein the mol ratio of bismuth salt, stabilizing agent and inclined to one side alum salts is 0.01～0.15: 0.01～0.05: 0.01～0.15;
(2) regulate pH value to 4.5～9 of above-mentioned clear solution with alkaline solution, bismuth salt mass ratio is 5: 1～20: 1 a rectorite in 20～100 ℃ of addings and step (1), and stirring and refluxing reaction 6-24h filters, bakes product, promptly.
2. the preparation method of a kind of rectorite self assembly pucherite water treatment agent according to claim 1 is characterized in that: the bismuth salt in the described step (1) is bismuth nitrate, waltherite, bismuth chloride or bismuth acetate.
3. the preparation method of a kind of rectorite self assembly pucherite water treatment agent according to claim 1 is characterized in that: the stabilizing agent in the described step (1) is disodium ethylene diamine tetraacetate, tetrasodium ethylenediamine tetraacetate, gluconic acid sodium salt or BTCA.
4. the preparation method of a kind of rectorite self assembly pucherite water treatment agent according to claim 1 is characterized in that: the metavanadate in the described step (1) is sodium metavanadate, potassium metavanadate or ammonium metavanadate.
5. the preparation method of a kind of rectorite self assembly pucherite water treatment agent according to claim 1 is characterized in that: the phosphate buffer in the described step (1) is by 0.025～0.05mol/L sodium dihydrogen phosphate and the solution composition of 0.05-0.1mol/L dibastic sodium phosphate.
6. the preparation method of a kind of rectorite self assembly pucherite water treatment agent according to claim 1 is characterized in that: the alkaline solution in the described step (2) is the NaOH of 0.5～1.5mol/L or the aqueous solution of potassium hydroxide.
7. the preparation method of a kind of rectorite self assembly pucherite water treatment agent according to claim 1 is characterized in that: the baking temperature in the described step (2) is 150～280 ℃, and the time of baking is 2～4h.
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| CN2011101268593A CN102247829A (en) | 2011-05-17 | 2011-05-17 | Method for preparing rectorite self-assembled bismuth vanadate water treatment agent |
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| CN2011101268593A CN102247829A (en) | 2011-05-17 | 2011-05-17 | Method for preparing rectorite self-assembled bismuth vanadate water treatment agent |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1683074A (en) * | 2005-03-11 | 2005-10-19 | 南京大学 | Process for preparing visible light responding photo catalytic film layer |
| CN101898142A (en) * | 2010-07-27 | 2010-12-01 | 武汉理工大学 | Method for preparing nano TiO2/rectorite composite high-adsorbability visible light catalyst |
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2011
- 2011-05-17 CN CN2011101268593A patent/CN102247829A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1683074A (en) * | 2005-03-11 | 2005-10-19 | 南京大学 | Process for preparing visible light responding photo catalytic film layer |
| CN101898142A (en) * | 2010-07-27 | 2010-12-01 | 武汉理工大学 | Method for preparing nano TiO2/rectorite composite high-adsorbability visible light catalyst |
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Application publication date: 20111123 |