CN102674512A - Composite flocculant for treating anionic dye wastewater and preparation method for composite flocculant - Google Patents
Composite flocculant for treating anionic dye wastewater and preparation method for composite flocculant Download PDFInfo
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- CN102674512A CN102674512A CN2012101354697A CN201210135469A CN102674512A CN 102674512 A CN102674512 A CN 102674512A CN 2012101354697 A CN2012101354697 A CN 2012101354697A CN 201210135469 A CN201210135469 A CN 201210135469A CN 102674512 A CN102674512 A CN 102674512A
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- flocculation agent
- anionic dye
- hydrotalcite
- waste water
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Abstract
The invention relates to a method for preparing a composite flocculant for treating anionic dye wastewater. The method comprises the following steps of: 1, mixing hydrotalcite, polymeric aluminum chloride and magnesium salt (based on magnesium element) in a mass ratio of (0.1-1):(2-5):(1-5); and 2, mixing a mixture obtained in step 1 and water in a solid-liquid ratio of 1:(2-5), and stirring uniformly to obtain the flocculant. The flocculant prepared by the method is cheap and efficient.
Description
Technical field
The present invention relates to a kind of composite flocculation agent and preparation method thereof, relate in particular to a kind of composite flocculation agent that is used to handle anionic dye waste water and preparation method thereof.
Background technology
China is textile printing and dyeing big country, and textile printing and dyeing industry is the industrial wastewater discharge rich and influential family, and the processing of dyeing waste water is the emphasis and the difficult point of China's wastewater treatment research always.The dyeing waste water principal feature is the organic components complicacy, hard-degraded substance is many, colourity is high, change of water quality is big etc., and for this reason, existing many technology are used for treatment of dyeing and printing.At present; The flocculation agent that is used for treatment of dyeing wastewater is of a great variety; Generally there are problems such as treatment effect is limited, the mud generation is big, processing costs height in these flocculation agents to treatment of dyeing wastewater, so the urgent hope of dyeing can provide a kind of flocculation agent of Cheap highly effective.
Hydrotalcite-like material belongs to anion type laminated compound; It is to be assembled by the interaction through non covalent bond of positively charged main body laminate and interlayer anion; Because its mainboard structure is positively charged, so anionic pollutant is had better adsorption.
Summary of the invention
Technical problem to be solved by this invention provides a kind of preparation method who is used to handle the composite flocculation agent of anionic dye waste water, overcomes the existing defective that the flocculation agent treatment effect is limited, the mud generation is big, processing costs is high.
The technical scheme that the present invention solves the problems of the technologies described above is following: a kind of preparation method who is used to handle the composite flocculation agent of anionic dye waste water, and may further comprise the steps: step (1): with hydrotalcite, Poly aluminum Chloride (PAC), magnesium salts (the magnesium salts quality is in the Mg element) is the mixed of 0.1～1:2～5:1～5 according to mass ratio; Step (2): the prepared mixture of said step (1) with after water mixes according to solid-to-liquid ratio 1:2～5, is stirred, make flocculation agent, said mixture promptly per ton can add 2～5 tons of water and make said composite flocculation agent.
The invention has the beneficial effects as follows: it is composite to adopt hydrotalcite, Poly aluminum Chloride (PAC), magnesium salts to be that starting material carry out; The preparation composite flocculation agent; Being used for anionic dye waste water handles; Because hydrotalcite has better adsorption to anionic dyestuff, therefore add hydrotalcite component and can improve the anionic dye waste water treatment effect; Simultaneously, add the hydrotalcite powder and in coagulation process, can also play the flco nucleogenesis, thereby improve settling of floccus speed and reduce the mud generation.
On the basis of technique scheme, the present invention can also do following improvement.
Further, the said magnesium salts of step (1) is magnesium chloride (MgCl
2), magnesium nitrate (Mg (NO
3)
2), sal epsom (MgSO
4).
Further, the proportioning of said hydrotalcite, Poly aluminum Chloride (PAC), magnesium salts (the magnesium salts quality is in the Mg element) is 0.2:2:1 (mass ratio).
Further, to make mixture be that 1:3 mixes with water according to solid-to-liquid ratio to said step (1).Promptly preferably in said mixture per ton, add 3 tons of water and make said composite flocculation agent.
Further, said hydrotalcite is the magnalium binary hydrotalcite.
Further, described magnalium binary hydrotalcite needs through pulverizing before using, and through 350-600 ℃ of roasting 1-3 hour.
Composite flocculation agent of the present invention compared with prior art has the following advantages:
(1) preparation technology of composite flocculation agent of the present invention is simple, the starting material wide material sources, and cost is low;
(2) added amount of chemical is little, has good decoloration performance, and flco is closely knit, and settling of floccus speed is fast;
(3) composite flocculation agent of the present invention is high to anionic dye waste water COD clearance;
(4) can be used for treatment of dyeing wastewater, also can be used for other industrial sewage and river course and handle, have very big application value.
Embodiment
Below principle of the present invention and characteristic are described, institute gives an actual example and only is used to explain the present invention, is not to be used to limit scope of the present invention.
Embodiment 1
Is that 0.2:2:1 mix by quality than proportioning with hydrotalcite, Poly aluminum Chloride (PAC), magnesium chloride (quality is in the Mg element), adds water after the mixing, is that 1:3 adds the water stirring according to solid-to-liquid ratio, makes flocculation agent; It is 200mg/L acid scarlet anionic dye waste water that this flocculation agent is handled initial COD by the 0.2mL/L dosage, and effluent COD concentration can be reduced to 60mg/L.
Embodiment 2
Is that 1:5:3 mix by quality than proportioning with hydrotalcite, Poly aluminum Chloride (PAC), sal epsom (quality is in the Mg element), and mixing the back is that 1:3 adds the water stirring by solid-to-liquid ratio, makes flocculation agent; It is 210mg/L acid scarlet anionic dye waste water that this flocculation agent is handled initial COD by the 0.15mL/L dosage, and effluent COD concentration can be reduced to 58mg/L.
Embodiment 3
With the magnalium binary hydrotalcite through 355 ℃ of roastings 3.1 hours; Quality according to magnalium binary hydrotalcite, Poly aluminum Chloride (PAC), sal epsom (quality is in the Mg element) is that 1:5:3 mixes than proportioning then; Mixing the back is that 1:2 adds the water stirring by solid-to-liquid ratio, makes flocculation agent; It is 210mg/L acid scarlet anionic dye waste water that this flocculation agent is handled initial COD by the 0.25mL/L dosage, and effluent COD concentration can be reduced to 62mg/L.
Embodiment 4
With the magnalium binary hydrotalcite through 600 ℃ of roastings 1 hour; Quality according to magnalium binary hydrotalcite, Poly aluminum Chloride (PAC), sal epsom (quality is in the Mg element) is that 0.2:2:2 mixes than proportioning then; Mixing the back is that 1:5 adds the water stirring by solid-to-liquid ratio, makes flocculation agent; It is 280mg/L acid scarlet anionic dye waste water that this flocculation agent is handled initial COD by the 0.2mL/L dosage, and effluent COD concentration can be reduced to 69mg/L.
Embodiment 5
With the magnalium binary hydrotalcite through 400 ℃ of roastings 2.2 hours; Quality according to magnalium binary hydrotalcite, Poly aluminum Chloride (PAC), sal epsom (quality is in the Mg element) is that 0.8:3:5 mixes than proportioning then; Mixing the back is that 1:4 adds the water stirring by solid-to-liquid ratio, makes flocculation agent; It is 270mg/L acid scarlet anionic dye waste water that this flocculation agent is handled initial COD by the 0.3mL/L dosage, and effluent COD concentration can be reduced to 55mg/L.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a preparation method who is used to handle the composite flocculation agent of anionic dye waste water is characterized in that, may further comprise the steps:
(1) be that mix 0.1～1:2～5:1～5 with hydrotalcite, Poly aluminum Chloride (PAC), magnesium salts according to the quality proportioning, wherein magnesium salts is in Mg element quality;
(2) the prepared mixture of said step (1) stirs with after water mixes according to solid-to-liquid ratio 1:2～5, makes flocculation agent.
2. according to the said preparation method who is used to handle the composite flocculation agent of anionic dye waste water of claim 1, it is characterized in that the said magnesium salts of step (1) is magnesium chloride, sal epsom, magnesium nitrate.
3. according to the said preparation method who is used to handle the composite flocculation agent of anionic dye waste water of claim 1, it is characterized in that the proportioning of said hydrotalcite, Poly aluminum Chloride (PAC), magnesium salts is 0.2:2:1 (mass ratio), wherein magnesium salts is in Mg element quality.
4. according to claim 1 or the 2 or 3 said preparing methods that are used to handle the composite flocculation agent of anionic dye waste water, it is characterized in that the mixture that said step (1) makes is after 1:3 mixes, to stir with water according to solid-to-liquid ratio.
5. according to claim 1 or the 2 or 3 said preparing methods that are used to handle the composite flocculation agent of anionic dye waste water, it is characterized in that said hydrotalcite is the magnalium binary hydrotalcite.
6. according to the said preparation method who is used to handle the composite flocculation agent of anionic dye waste water of claim 5, it is characterized in that described magnalium binary hydrotalcite needs before using through pulverizing, and through 350-600 ℃ of roasting 1-3 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210135469.7A CN102674512B (en) | 2012-05-02 | 2012-05-02 | Composite flocculant for treating anionic dye wastewater and preparation method for composite flocculant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210135469.7A CN102674512B (en) | 2012-05-02 | 2012-05-02 | Composite flocculant for treating anionic dye wastewater and preparation method for composite flocculant |
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| Publication Number | Publication Date |
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| CN102674512A true CN102674512A (en) | 2012-09-19 |
| CN102674512B CN102674512B (en) | 2015-01-21 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103055803A (en) * | 2012-12-20 | 2013-04-24 | 中国科学院生态环境研究中心 | Preparation method of aluminum modified hydrotalcite fluoride-removal adsorbent |
| CN105668736A (en) * | 2016-01-25 | 2016-06-15 | 上海艾耐基新能源科技有限公司 | FeCl2 modified mica powder as inorganic compound flocculant and preparation method thereof |
| CN106542626A (en) * | 2016-12-08 | 2017-03-29 | 应剑军 | A kind of dyeing and printing sewage flocculant and preparation method thereof |
| CN106630056A (en) * | 2016-12-08 | 2017-05-10 | 应剑军 | Urban sewage flocculant and preparation method thereof |
| CN109851093A (en) * | 2019-01-24 | 2019-06-07 | 温州泽荣建设工程有限公司 | A kind of energy-saving and emission-reducing town sewage treatment system |
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| CN1142811A (en) * | 1993-12-23 | 1997-02-12 | 克罗斯菲尔德有限公司 | Effluent treatment with hydrotalcite |
| CN1569671A (en) * | 2003-07-24 | 2005-01-26 | 合肥工业大学 | Water treatment method for instant synthesis of laminated bis-hydroxide |
| CN1623922A (en) * | 2003-12-02 | 2005-06-08 | 中国科学院生态环境研究中心 | Compound water treatment decolour flocculation agent |
| CN1810673A (en) * | 2005-01-27 | 2006-08-02 | 三国生态***株式会社 | Coagulating-separation purifying agent and purifying means for drainage water |
| CN101786645A (en) * | 2010-02-04 | 2010-07-28 | 上海新豫环保科技有限公司 | Basic silica-based aluminate serial waste water treating agent and waste water treatment method |
| CN101798123A (en) * | 2010-03-26 | 2010-08-11 | 浙江工业大学 | Application of bimetal composite oxide in adsorbing acid violet 90 in dye wastewater |
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2012
- 2012-05-02 CN CN201210135469.7A patent/CN102674512B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1142811A (en) * | 1993-12-23 | 1997-02-12 | 克罗斯菲尔德有限公司 | Effluent treatment with hydrotalcite |
| CN1569671A (en) * | 2003-07-24 | 2005-01-26 | 合肥工业大学 | Water treatment method for instant synthesis of laminated bis-hydroxide |
| CN1623922A (en) * | 2003-12-02 | 2005-06-08 | 中国科学院生态环境研究中心 | Compound water treatment decolour flocculation agent |
| CN1810673A (en) * | 2005-01-27 | 2006-08-02 | 三国生态***株式会社 | Coagulating-separation purifying agent and purifying means for drainage water |
| CN101786645A (en) * | 2010-02-04 | 2010-07-28 | 上海新豫环保科技有限公司 | Basic silica-based aluminate serial waste water treating agent and waste water treatment method |
| CN101798123A (en) * | 2010-03-26 | 2010-08-11 | 浙江工业大学 | Application of bimetal composite oxide in adsorbing acid violet 90 in dye wastewater |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103055803A (en) * | 2012-12-20 | 2013-04-24 | 中国科学院生态环境研究中心 | Preparation method of aluminum modified hydrotalcite fluoride-removal adsorbent |
| CN105668736A (en) * | 2016-01-25 | 2016-06-15 | 上海艾耐基新能源科技有限公司 | FeCl2 modified mica powder as inorganic compound flocculant and preparation method thereof |
| CN106542626A (en) * | 2016-12-08 | 2017-03-29 | 应剑军 | A kind of dyeing and printing sewage flocculant and preparation method thereof |
| CN106630056A (en) * | 2016-12-08 | 2017-05-10 | 应剑军 | Urban sewage flocculant and preparation method thereof |
| CN106630056B (en) * | 2016-12-08 | 2020-05-15 | 江苏融汇环境工程有限公司 | Urban sewage flocculating agent and preparation method thereof |
| CN109851093A (en) * | 2019-01-24 | 2019-06-07 | 温州泽荣建设工程有限公司 | A kind of energy-saving and emission-reducing town sewage treatment system |
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| Publication number | Publication date |
|---|---|
| CN102674512B (en) | 2015-01-21 |
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