CN101638259B - Method for preparing synthesized high iron-based silicon compound high-molecular coagulant adopting flyash extract - Google Patents
Method for preparing synthesized high iron-based silicon compound high-molecular coagulant adopting flyash extract Download PDFInfo
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- CN101638259B CN101638259B CN2009100186029A CN200910018602A CN101638259B CN 101638259 B CN101638259 B CN 101638259B CN 2009100186029 A CN2009100186029 A CN 2009100186029A CN 200910018602 A CN200910018602 A CN 200910018602A CN 101638259 B CN101638259 B CN 101638259B
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Abstract
A method for preparing synthesized high iron-based silicon compound inorganic high-molecular coagulant adopting flyash extract comprises the following steps: first taking 600-650 parts of flyash by weight, soaking the flyash in 200-250 parts of potassium hydroxide solution at a concentration of 20-40g/L by weight, then heating the flyash in water bath for 20-40h, mixing obtained flyash extract with sulfuric acid in a ratio of 1:2, adjusting pH value from 1 to 3, standing for 1-3h, heating the mixture to 40-60 DEG C, enabling the mixture to fully react with 95-198 parts of ferrate by weight, then adding 2-5 parts of stabilizing agents by weight and carrying out aging for 1-3h, thus preparing the compound inorganic high-molecular coagulant. The compound inorganic high-molecular coagulant prepared by using the method takes flyash as the raw material, dispenses with high temperature roasting, enjoys simple and practicable preparation technology and low production cost, contains no substances harmful to organisms, can substantially improve the removal effect of heavy metals and ensures the removal rate of lead to reach 89-99%.
Description
Technical field
The present invention relates to a kind of preparation method of composite macromolecule coagulant, especially a kind of preparation method of flyash extract synthesized high iron-based silicon composite inorganic high molecular coagulating agent.
Background technology
The composite inorganic high molecular coagulating agent is widely used in the middle of the water treatment field at present.Mainly be higher on treatment effect to the clearance of turbidity, colourity, COD, effect is remarkable in the application of treatment of dyeing and printing, paper waste, and do not have positive effect, thereby in the application that heavy metal industrial effluent is handled, has certain limitation for the removal of heavy metal in the trade effluent.
Summary of the invention
For overcoming the composite inorganic high molecular coagulating agent in the deficiency of removing aspect the heavy metal, the invention provides a kind of is the high iron-based silicon composite inorganic high molecular coagulating agent and preparation method thereof of main raw material with the flyash extract.
A kind of preparation method of flyash extract synthesized high iron-based silicon composite inorganic high molecular coagulating agent comprises the steps (below be weight part):
(1) getting flyash 600-650 part, is after potassium hydroxide solution 200-250 part of 20-40g/L is soaked through concentration, heating in water bath 20-40h, flyash extract;
(2) sulfuric acid of above-mentioned steps gained flyash extract with 1: 2 is mixed, regulate PH, leave standstill 1-3h, get mixed solution at 1-3;
(3) above-mentioned steps gained mixed solution is heated to 40 ℃-60 ℃, fully reacts, get coagulating agent with ferrate 95-198 part;
(4) will add stablizer 2-5 part in the coagulating agent of above-mentioned steps preparation, slaking 1-3h promptly makes the composite inorganic high molecular coagulating agent.
Described ferrate is a kind of in ferric acid tripotassium sodium, the Na2Fe04.
Described stablizer is Sodium phosphate dibasic (Na
2HPO
4), a kind of in the Trisodium Citrate, sodium tartrate.
By the composite inorganic high molecular coagulating agent of above-mentioned preparation method's preparation, getting flyash is raw material, does not need high-temperature roasting, and preparation is simple, and production cost is low, does not contain biological objectionable impurities, and is safe and reliable.The main component of flyash is silicon-dioxide (SO
2), silicon-dioxide can form very strong chemical bond with the arc electronics on the organism hydroxyl oxygen, and physical and chemical adsorption takes place, thereby has the effect of significant decolouring and removal COD.Extracting solution main component after potassium hydroxide solution is handled flyash is a silicon-dioxide, and the high iron-based silicon composite inorganic high molecular coagulating agent that reacts generation with ferrate under certain condition can increase substantially removal rate of heavy metal.This composite inorganic high molecular coagulating agent can increase substantially the removal effect of heavy metal on the clearance basis that guarantees colourity, turbidity, COD.For lead-containing industrial wastewater, the COD clearance reaches 74%-93.5%, and colourity drops to below 3, and the SS clearance reaches 85%-98%, and plumbous clearance reaches 89%-99%.
Flyash extract synthesized high iron-based silicon composite inorganic high molecular coagulating agent provided by the invention and preparation method thereof, do not need high-temperature roasting technology, do not consume the coal energy, do not need complicated technology, equipment simultaneously yet, meet the environmental protection policy of current national energy-saving and emission-reduction.The composite inorganic high molecular coagulating agent of preparation has overcome existing composite inorganic high molecular coagulating agent contains DeGrain aspect the heavy metal industrial effluent in processing shortcoming.And its dosage is few, and stable chemical performance is saved the Industrial Wastewater Treatment cost, is a kind of new and effective composite inorganic high molecular coagulating agent.
Embodiment
Embodiment one:
Heating in water bath 20h takes out extracting solution after 200 parts of immersions of potassium hydroxide solution that to get 600 parts of flyash concentration be 20g/L, mix with 1: 2 sulfuric acid, transfer pH value to 1, leave standstill 1h, be heated to 40 ℃, fully react, add 2 parts of Sodium phosphate dibasics with 198 parts ferric acid tripotassium sodium, slaking 1h gets high iron-based silicon composite inorganic high molecular coagulating agent.
The coagulating agent of this embodiment preparation is for the treatment effect of lead-containing industrial wastewater: the COD clearance is 74%, and colourity drops to 3, and the SS clearance is 85%, and plumbous clearance is 89%.
Embodiment two:
Heating in water bath 26h takes out extracting solution after 210 parts of immersions of potassium hydroxide solution that to get 620 parts of flyash concentration be 25g/L, mix with 1: 2 sulfuric acid, transfer pH value to 1.5, leave standstill 2h, be heated to 50 ℃, fully react, add 3 parts Trisodium Citrate with 167 parts Na2Fe04, slaking 2h gets high iron-based silicon composite inorganic high molecular coagulating agent.
The coagulating agent of this embodiment preparation is for the treatment effect of lead-containing industrial wastewater: the COD clearance is 80%, and colourity drops to 2, and the SS clearance is 90%, and plumbous clearance is 92%.
Embodiment three:
Heating in water bath 30h takes out extracting solution after 220 parts of immersions of potassium hydroxide solution that to get 640 parts of flyash concentration be 35g/L, mix with 1: 2 sulfuric acid, transfer pH value to 2, leave standstill 2.5h, be heated to 55 ℃, fully react, add 4 parts sodium tartrate with 136 parts ferric acid tripotassium sodium, slaking 2.5h gets high iron-based silicon composite inorganic high molecular coagulating agent.
The coagulating agent of this embodiment preparation is for the treatment effect of lead-containing industrial wastewater: the COD clearance is 90%, and colourity drops to 2, and the SS clearance is 95%, and plumbous clearance is 96%.
Embodiment four:
Get 650 parts of flyash and take out extracting solution with heating in water bath 40h after 250 parts of immersions of potassium hydroxide solution of 40g/L, mix with 1: 2 sulfuric acid, transfer pH value to 3, leave standstill 3h, be heated to 60 ℃, fully react, add 5 parts sodium tartrate with 95 parts Na2Fe04, slaking 3h gets high iron-based silicon composite inorganic high molecular coagulating agent.
The coagulating agent of this embodiment preparation is for the treatment effect of lead-containing industrial wastewater: the COD clearance is 93.5%, and colourity drops to 1, and the SS clearance is 98%, and plumbous clearance is 99%.
(more than be weight part)
Claims (3)
1. the preparation method of a flyash extract synthesized high iron-based silicon compound high-molecular coagulant adopting is characterized in that, comprises the steps (below be weight part):
(1) getting flyash 600-650 part, is after potassium hydroxide solution 200-250 part of 20-40g/L is soaked through concentration, heating in water bath 20-40h, flyash extract;
(2) sulfuric acid of above-mentioned steps gained flyash extract with 1: 2 is mixed, regulate PH, leave standstill 1-3h, get mixed solution at 1-3;
(3) above-mentioned steps gained mixed solution is heated to 40 ℃-60 ℃, fully reacts, get coagulating agent with ferrate 95-198 part;
(4) will add stablizer 2-5 part in the coagulating agent of above-mentioned steps preparation, slaking 1-3h promptly makes the composite inorganic high molecular coagulating agent.
2. the preparation method of flyash extract synthesized high iron-based silicon compound high-molecular coagulant adopting as claimed in claim 1 is characterized in that, wherein ferrate is a kind of in ferric acid tripotassium sodium, the Na2Fe04.
3. the preparation method of flyash extract synthesized high iron-based silicon compound high-molecular coagulant adopting as claimed in claim 1 is characterized in that, stablizer is a kind of in Sodium phosphate dibasic, Trisodium Citrate, the sodium tartrate.
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| CN2009100186029A CN101638259B (en) | 2009-09-02 | 2009-09-02 | Method for preparing synthesized high iron-based silicon compound high-molecular coagulant adopting flyash extract |
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| CN101638259A CN101638259A (en) | 2010-02-03 |
| CN101638259B true CN101638259B (en) | 2011-11-09 |
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| CN101955214B (en) * | 2010-09-30 | 2012-08-01 | 济南大学 | Silicon aluminum polysulphate coagulant prepared from red mud |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1160682A (en) * | 1996-04-01 | 1997-10-01 | 国家海洋局海洋环境保护研究所 | Composite coagulant for water treatment and its preparation process |
| CN1403388A (en) * | 2001-08-31 | 2003-03-19 | 姚钢 | Production process of inorganic Al-Fe polymerized coagulant with flyash |
| CN1672821A (en) * | 2005-04-08 | 2005-09-28 | 张彭成 | Compound treating method of waste industrial sulfuric acid and flyash |
| CN1762848A (en) * | 2005-08-26 | 2006-04-26 | 南京工业大学 | Coagulant for disposing dying waste water and its production method |
-
2009
- 2009-09-02 CN CN2009100186029A patent/CN101638259B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1160682A (en) * | 1996-04-01 | 1997-10-01 | 国家海洋局海洋环境保护研究所 | Composite coagulant for water treatment and its preparation process |
| CN1403388A (en) * | 2001-08-31 | 2003-03-19 | 姚钢 | Production process of inorganic Al-Fe polymerized coagulant with flyash |
| CN1672821A (en) * | 2005-04-08 | 2005-09-28 | 张彭成 | Compound treating method of waste industrial sulfuric acid and flyash |
| CN1762848A (en) * | 2005-08-26 | 2006-04-26 | 南京工业大学 | Coagulant for disposing dying waste water and its production method |
Non-Patent Citations (1)
| Title |
|---|
| 付英，等人.聚硅酸铁混凝剂絮凝与破碎的定量研究.《环境科学》.2008,第29卷(第1期),第92-98页. * |
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