CN102674512B - 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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- CN102674512B CN102674512B CN201210135469.7A CN201210135469A CN102674512B CN 102674512 B CN102674512 B CN 102674512B CN 201210135469 A CN201210135469 A CN 201210135469A CN 102674512 B CN102674512 B CN 102674512B
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- flocculation agent
- anionic dye
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- hydrotalcite
- magnesium
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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, particularly relate to a kind of composite flocculation agent for the treatment of 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 industrial wastewater discharge rich and influential family, and the process of dyeing waste water is the Focal point and difficult point of China's wastewater treatment research always.Dyeing waste water principal feature is that organic components is complicated, hard-degraded substance is many, colourity is high, change of water quality is large, and for this reason, existing many technology are for the treatment of dyeing waste water.At present, flocculation agent for treatment of dyeing wastewater is of a great variety, generally there is the problems such as treatment effect is limited, mud generation is large, processing costs is high to treatment of dyeing wastewater in these flocculation agents, therefore dyeing urgently wishes the flocculation agent that can provide a kind of Cheap highly effective.
Hydrotalcite-like material belongs to anion type laminated compound, it is formed by the interaction assembling of non covalent bond by positively charged main body laminate and interlayer anion, because its mainboard structure is positively charged, so there is better adsorption to anionic pollutant.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method of the composite flocculation agent for the treatment of anionic dye waste water, overcomes the defect that existing flocculation agent treatment effect is limited, mud generation is large, processing costs is high.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of preparation method of the composite flocculation agent for the treatment of anionic dye waste water, comprises the following steps: step (1): the ratio mixing by hydrotalcite, polymerize aluminum chloride, magnesium salts (magnesium salts quality is in Mg element) according to mass ratio being 0.1 ~ 1:2 ~ 5:1 ~ 5; Step (2): after being mixed according to solid-to-liquid ratio 1:2 ~ 5 with water by the mixture obtained by described step (1), stir, obtained flocculation agent, namely described mixture per ton can add 2 ~ 5 tons of water and obtains described composite flocculation agent.
The invention has the beneficial effects as follows: adopt hydrotalcite, that polymerize aluminum chloride, magnesium salts are that starting material carry out is composite, prepare composite flocculation agent, for anionic dye waste water process, because hydrotalcite has better adsorption to anionic dyestuff, therefore add hydrotalcite component and can improve anionic dye waste water treatment effect; Meanwhile, add hydrotalcite powder and can also play flco nucleogenesis in coagulation process, thus improve floc settling velocity and reduce mud generation.
On the basis of technique scheme, the present invention can also do following improvement.
Further, step (1) described magnesium salts is magnesium chloride (MgCl
2), magnesium nitrate (Mg(NO
3)
2), magnesium sulfate (MgSO
4).
Further, the proportioning of described hydrotalcite, polymerize aluminum chloride, magnesium salts (magnesium salts quality is in Mg element) is 0.2:2:1(mass ratio).
Further, the obtained mixture of described step (1) is that 1:3 mixes with water according to solid-to-liquid ratio.Namely preferably in described mixture per ton, add 3 tons of water obtain described composite flocculation agent.
Further, described hydrotalcite is binary magnesium-aluminum hydrotalcite.
Further, described binary magnesium-aluminum hydrotalcite, needs before using through pulverizing, and through 350-600 DEG C 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, and raw material sources is extensive, and cost is low;
(2) added amount of chemical is little, and have good decoloration performance, flco is closely knit, and floc settling velocity 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 process, there is very large application value.
Embodiment
Be described principle of the present invention and feature below, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1
By hydrotalcite, polymerize aluminum chloride, magnesium chloride (quality is in Mg element) in mass ratio proportioning be 0.2:2:1 mixing, add water after mixing, be that 1:3 adds water stirrings according to solid-to-liquid ratio, obtain flocculation agent; This flocculation agent is 200mg/L acid scarlet anionic dye waste water by the initial COD of 0.2mL/L dosage process, and effluent COD concentration can be down to 60mg/L.
Embodiment 2
By hydrotalcite, polymerize aluminum chloride, magnesium sulfate (quality is in Mg element) in mass ratio proportioning be 1:5:3 mixing, be that 1:3 adds water stirrings by solid-to-liquid ratio after mixing, obtain flocculation agent; This flocculation agent is 210mg/L acid scarlet anionic dye waste water by the initial COD of 0.15mL/L dosage process, and effluent COD concentration can be down to 58mg/L.
Embodiment 3
By binary magnesium-aluminum hydrotalcite through 355 DEG C of roastings 3.1 hours, then according to binary magnesium-aluminum hydrotalcite, polymerize aluminum chloride, magnesium sulfate (quality is in Mg element) quality than proportioning be 1:5:3 mixing, be that 1:2 adds water stirring by solid-to-liquid ratio after mixing, obtained flocculation agent; This flocculation agent is 210mg/L acid scarlet anionic dye waste water by the initial COD of 0.25mL/L dosage process, and effluent COD concentration can be down to 62mg/L.
Embodiment 4
By binary magnesium-aluminum hydrotalcite through 600 DEG C of roastings 1 hour, then according to binary magnesium-aluminum hydrotalcite, polymerize aluminum chloride, magnesium sulfate (quality is in Mg element) quality than proportioning be 0.2:2:2 mixing, be that 1:5 adds water stirring by solid-to-liquid ratio after mixing, obtained flocculation agent; This flocculation agent is 280mg/L acid scarlet anionic dye waste water by the initial COD of 0.2mL/L dosage process, and effluent COD concentration can be down to 69mg/L.
Embodiment 5
By binary magnesium-aluminum hydrotalcite through 400 DEG C of roastings 2.2 hours, then according to binary magnesium-aluminum hydrotalcite, polymerize aluminum chloride, magnesium sulfate (quality is in Mg element) quality than proportioning be 0.8:3:5 mixing, be that 1:4 adds water stirring by solid-to-liquid ratio after mixing, obtained flocculation agent; This flocculation agent is 270mg/L acid scarlet anionic dye waste water by the initial COD of 0.3mL/L dosage process, and effluent COD concentration can be down to 55mg/L.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. for the treatment of a preparation method for the composite flocculation agent of anionic dye waste water, it is characterized in that, comprise the following steps:
(1) be that 0.1 ~ 1:2 ~ 5:1 ~ 5 mixes by hydrotalcite, polymerize aluminum chloride, magnesium salts according to quality proportioning, wherein magnesium salts is in Mg element quality;
(2), after the mixture obtained by described step (1) mixes according to solid-to-liquid ratio 1:2 ~ 5 with water, stir, obtained flocculation agent.
2. according to claim 1 for the treatment of the preparation method of the composite flocculation agent of anionic dye waste water, it is characterized in that, step (1) described magnesium salts is magnesium chloride or magnesium sulfate.
3. according to claim 1 for the treatment of the preparation method of the composite flocculation agent of anionic dye waste water, it is characterized in that, the proportioning of described hydrotalcite, polymerize aluminum chloride, magnesium salts is 0.2:2:1(mass ratio), wherein magnesium salts is in Mg element quality.
4. according to claim 1 or 2 or 3 for the treatment of the preparation method of the composite flocculation agent of anionic dye waste water, it is characterized in that, the obtained mixture of described step (1) is, after 1:3 mixes, stir with water according to solid-to-liquid ratio.
5. according to claim 1 or 2 or 3 for the treatment of the preparation method of the composite flocculation agent of anionic dye waste water, it is characterized in that, described hydrotalcite is binary magnesium-aluminum hydrotalcite.
6. according to claim 5 for the treatment of the preparation method of the composite flocculation agent of anionic dye waste water, it is characterized in that, described binary magnesium-aluminum hydrotalcite, needing before using through pulverizing, and through 350-600 DEG C of roasting 1-3 hour.
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| 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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| 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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Families Citing this family (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 |
| CN105668736B (en) * | 2016-01-25 | 2018-12-11 | 上海艾耐基科技股份有限公司 | Modified micaceous powder inorganic composite flocculant of frerrous chloride and preparation method thereof |
| CN106542626B (en) * | 2016-12-08 | 2020-05-19 | 江苏融汇环境工程有限公司 | Printing and dyeing 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142811A (en) * | 1993-12-23 | 1997-02-12 | 克罗斯菲尔德有限公司 | Effluent treatment with hydrotalcite |
| 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 |
| 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 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1257847C (en) * | 2003-07-24 | 2006-05-31 | 合肥工业大学 | Water treatment method for instant synthesis of laminated bis-hydroxide |
| JP4515273B2 (en) * | 2005-01-27 | 2010-07-28 | 株式会社ミクニ | Condensation separation purification agent and purification method of polluted waste 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 |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142811A (en) * | 1993-12-23 | 1997-02-12 | 克罗斯菲尔德有限公司 | Effluent treatment with hydrotalcite |
| 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 |
| 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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