CN101362613B - Agent for magnetically separating and purifying algal bloom and preparation method thereof - Google Patents
Agent for magnetically separating and purifying algal bloom and preparation method thereof Download PDFInfo
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- CN101362613B CN101362613B CN2007100497226A CN200710049722A CN101362613B CN 101362613 B CN101362613 B CN 101362613B CN 2007100497226 A CN2007100497226 A CN 2007100497226A CN 200710049722 A CN200710049722 A CN 200710049722A CN 101362613 B CN101362613 B CN 101362613B
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Abstract
The invention relates to a magnetic separation and purification algal bloom medicament and a preparation method thereof, and the preparation method is mainly realized by adding a certain proportion of clay and magnetic powder in chitosan solution, stirring, ultrasonic treatment and evenly mixing. Chitosan in the medicament plays the main flocculation role, the clay and the magnetic powder play the auxiliary flocculation role and the accelerated sedimentation role, the feeding amount of the medicament is small, and algal bloom flocks are formed through the electrical neutralization and the bridge erection within 3min. In addition, the formed flocks are magnetic through the added magnetic powder, a water body can be rapidly removed from the flocks within 2 to 5s through the prior industrial large-flow magnetic separation device, and the removal rate of the algal bloom can be more than 95 percent.
Description
Affiliated technical field
The invention belongs to wastewater treatment, pollutant purification field, particularly relate to a kind of medicament and preparation method that can come purifying algal bloom by magnetic separation technique.
Background technology
China lake is subjected to pollutions such as industry, agricultural effluent and culture fishery, and the ecosystem of water has suffered havoc.Some lakes are serious because of water quality eutrophication degree, break out the water body in large algal tufa, the water quality greening occurs and turn blue smellyly, not only influenced water landscape, the development of culture fishery, and also algae toxicity constitutes waterhead area is threatened.Only Taihu Lake, Chaohu, Dian Chi algal tufa surpass billions of units for country and the local financial loss that causes every year, so the outburst of algae has become a kind of disaster.
Remove the algal tufa method at present and can be divided into two classes, a class is a digestion method: the method for circulation digestion algal tufa in lake water, another kind of is the taking-up method: the method for directly taking out algal tufa from lake water.
Digestion method has ultraviolet to kill algae, ultrasonic wave is killed physics methods such as algae, high pressure ionization, high-voltage pulse, alternating intense magnetic field, and chemistry kills chemical methods such as algae method, flocculent precipitation, biological processes such as biological restoration.Digestion method is cured the symptoms, not the disease, and nitrogen, phosphorus and algal tufa corruption nutritive substance such as plant still in water body, handle take effect slow, cost is high, the difficult improvement that generally is applicable to big area, sudden algal tufa.
The taking-up method has that machinery drags for the algae method, the desilting method of dredging, change water law etc., belongs to physical method and physical chemistry method.
In flocculent precipitation, have and adopt general chemistry flocculation agent (poly-aluminium, poly-iron etc.), but the destructible eubiosis of medicament own causes hydrobiont death; Be exactly to adopt modified clay flocculating settling algae in addition.Adopting modified clay to remove in the method for algae, Ecological Environment Research Center, Chinese Academy of Sciences is 02155284.3 patent " a kind of highly effective alga flocculating agent extremely is used for administering the method for red tide and wawter bloom " at application number, announced corresponding flocculation medicaments preparation method, mainly realized by chitin modified clay.Its medicament is environmentally friendly, has advantages such as consumption is few, flocculating effect is good.
In the taking-up method, Hefei Inst. of Plasma Physics, Chinese Academy of Sciences is in application number is 200610038151.1 patent " method of composite type inorganic polymer water quality purifier and magnetic gathering algae eliminating ", a kind of water quality cleansing agent and algal tufa removing method have been announced, its water quality cleansing agent is for to add magnetic in chitosan, algal tufa takes out from water body and can realize by magnetic response.
But there are some shortcomings respectively in flocculation medicament and algal tufa improvement method thereof that above patent is mentioned.As in 02155284.3 patent, flocculate precipitate can not adopt simple method to take out water body, sinks to the bottom that algae can continue breeding and the algae toxin can't decompose, and causes secondary pollution etc.; In 200610038151.1 patents, what really play throwing out is single chitosan, and magnetic itself does not possess throwing out, and its flocculating effect is not good enough, and settling velocity is slower, requires the magnetic consumption many, makes that the water quality cleansing agent consumption is big, the treatment cost height.
Summary of the invention
At the deficiency that exists in the medicament of above-mentioned improvement algal tufa and the method, the present invention proposes a kind of agent for magnetically separating and purifying algal bloom and preparation method thereof.It can solve the deficiencies in the prior art effectively this medicament, not only has good flocculating effect, and the flco that uses this medicament to produce, magnetic is big, good by the isolating performance of magnetic, can in 2～5s, flco be shifted out water body by the magnetic separating apparatus of big flow, eutrophication materials such as the nitrogen in the reduction water body, phosphorus, 95% above algae itself also is moved out of water body simultaneously.
The present invention is achieved through the following technical solutions:
A kind of agent for magnetically separating and purifying algal bloom, it is characterized in that this medicament is to make with clay and magnetic modified natural polymer polymer shell glycan, wherein the weight ratio of chitosan and clay is 1: 5～1: 20, and the weight ratio of chitosan and magnetic is 1: 2～1: 20, and magnetic is Fe
3O
4Powder, Fe
2O
3In powder, the magnetite powder one or more, particle diameter are 20～150 microns, and are not premagnetization.
Clay in this medicament is one or more in sepiolite, montmorillonite, Attapulgite, the diatomite.
The method for preparing above-mentioned agent for magnetically separating and purifying algal bloom, it is characterized in that after in chitosan solution, adding clay and magnetic, the high-speed stirring 10min of elder generation, handling the 1min mixing by ultrasonic water bath then makes, wherein the weight ratio of chitosan and clay is 1: 5～1: 20, the weight ratio of chitosan and magnetic is 1: 2～1: 20, and used magnetic is Fe
3O
4Powder, Fe
2O
3In powder, the magnetite powder one or more, particle diameter are 20～150 microns, and are not premagnetization.
Used clay is one or more in sepiolite, montmorillonite, Attapulgite, the diatomite in this method.
At first, compound concentration is 0.1～0.15% chitosan solution, then magnetic and clay is added, and gets final product by high-speed stirring or supersound process mixing.The granularity that adds magnetic is 20～150 microns, and the principal item of clay is Attapulgite, sepiolite, diatomite etc.In every liter of concentration was 0.1～0.15% chitosan solution, the add-on of magnetic was 2～20g, and the add-on of clay is 10～20g.
More than how many Pei Zhi medicaments that is used for magnetically separating and purifying algal bloom looks frustule size and algae content, and dosage is 3～20ppm.Medicament and algal tufa can be in 3～5min be built bridge fast, form little magnetic algal tufa floc sedimentation, by the strong magnetic of rare-earth magnetic disc, in 2～5s, lake water is separated with little magnetic algal tufa floc sedimentation, and flow fast processing lake water greatly, the algal tufa clearance is greater than 95%.
Agent for magnetically separating and purifying algal bloom of the present invention is characterized in:
1. flocculating effect is good, and settling velocity is fast.The clay and the magnetic that add can be used as nuclear, and the effect of auxiliary flocculation is arranged, and take off steady and bridging action by the electrical neutralization of chitosan, and its flocculating effect is better than single chitosan, add the action of gravity of the flocculation nuclear of clay and magnetic, and settling velocity is fast.
2. the magnetic amount is few, and the magnetic separation performance is good.The magnetic amount that adds is few, but granularity is suitable for the rare earth magnetic field separation.Magnetic flco can directly adopt and be used for industrial big flow magnetic separating apparatus (as rare-earth magnetic disc isolation of purified waste fitment) and separate, and has solved the problem that shifts out water body that contains the algae flco.
3. the more common chitosan magnetic flocculation agent of cost is cheap.Add certain amount of clay, can be used as flocculation nuclear and quicken sedimentation, reduced the usage quantity of chitosan, reduced reagent cost.
Agent for magnetically separating and purifying algal bloom of the present invention, its preparation method is simple, and it is good to have a flocculating effect, and settling velocity is fast, the magnetic algal tufa flco that forms can directly be handled by existing magnetic separating apparatus, is the medicament that algal tufa is handled in a kind of more satisfactory being used at present.
Description of drawings
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Embodiment
Below by embodiment technology of the present invention is further described.
Example 1: take by weighing technical grade water-soluble chitosan 1g, thin up stirred 5 minutes to 1000ml, got homogeneous 0.1% chitosan solution.Take by weighing sepiolite 10g respectively, granularity is 100 microns magnetic 5g, adds in the chitosan solution for preparing, and high-speed stirring 10min places ultrasonic water bath to handle 1min then, promptly gets agent for magnetically separating and purifying algal bloom of the present invention.
Example 2: take by weighing general industry level chitosan 1.5g, add a certain amount of dilute hydrochloric acid, adjust pH=3, after the chitosan dissolving, thin up stirs to 1000ml, gets 0.15% chitosan solution.Take by weighing attapulgite 20g respectively, granularity is 50 microns magnetic 10g, joins in the chitosan solution for preparing, and high-speed stirring 10min places ultrasonic water bath to handle 1min then, promptly gets agent for magnetically separating and purifying algal bloom of the present invention.
Claims (4)
1. agent for magnetically separating and purifying algal bloom, it is characterized in that this medicament is to make with clay and magnetic modified natural polymer polymer shell glycan, wherein the weight ratio of chitosan and clay is 1: 5～1: 20, and the weight ratio of chitosan and magnetic is 1: 2～1: 20, and magnetic is Fe
3O
4Powder, Fe
2O
3In powder, the magnetite powder one or more, particle diameter are 20～150 microns, and are not premagnetization.
2. agent for magnetically separating and purifying algal bloom according to claim 1 is characterized in that clay in this medicament is one or more in sepiolite, montmorillonite, Attapulgite, the diatomite.
3. method for preparing each described agent for magnetically separating and purifying algal bloom in the claim 1, it is characterized in that after in chitosan solution, adding clay and magnetic, the high-speed stirring 10min of elder generation, handling the 1min mixing by ultrasonic water bath then makes, wherein the weight ratio of chitosan and clay is 1: 5～1: 20, the weight ratio of chitosan and magnetic is 1: 2～1: 20, and used magnetic is Fe
3O
4Powder, Fe
2O
3In powder, the magnetite powder one or more, particle diameter are 20～150 microns, and are not premagnetization.
4. the method for preparing agent for magnetically separating and purifying algal bloom according to claim 3 is characterized in that clay used in this method is one or more in sepiolite, montmorillonite, Attapulgite, the diatomite.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100497226A CN101362613B (en) | 2007-08-10 | 2007-08-10 | Agent for magnetically separating and purifying algal bloom and preparation method thereof |
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|---|---|---|---|
| CN2007100497226A CN101362613B (en) | 2007-08-10 | 2007-08-10 | Agent for magnetically separating and purifying algal bloom and preparation method thereof |
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| Publication Number | Publication Date |
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| CN101362613A CN101362613A (en) | 2009-02-11 |
| CN101362613B true CN101362613B (en) | 2011-06-29 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102627342A (en) * | 2012-04-19 | 2012-08-08 | 宁夏兴平精细化工股份有限公司 | Magnetic powder flocculating agent and application method thereof |
| CN104211226B (en) * | 2014-09-16 | 2016-02-10 | 上海交通大学 | A kind of method utilizing nano-iron material to remove Measures of Algae in Water Body |
| CN104211227A (en) * | 2014-09-16 | 2014-12-17 | 上海交通大学 | Method for removing algal toxin in water body by using nano-iron material |
| CN107162143A (en) * | 2017-07-01 | 2017-09-15 | 辽东学院 | Dyeing waste water purifies flocculant and its dyeing waste water purification applications |
| CN108048330B (en) * | 2017-11-28 | 2021-05-11 | 东华大学 | Method for collecting selenium-rich chlorella product by using diatomite-based positively charged green flocculant |
| CN113697920B (en) * | 2021-09-18 | 2023-08-22 | 中冶华天南京工程技术有限公司 | Sludge treatment method for resource utilization, water body purifying agent and application |
| CN113860447B (en) * | 2021-09-26 | 2023-06-20 | 中冶华天南京工程技术有限公司 | Method for removing algae in whole life cycle of blue algae |
| CN114212890A (en) * | 2021-11-30 | 2022-03-22 | 华中科技大学 | High-value utilization method of microalgae energy |
| CN117486326B (en) * | 2023-11-02 | 2024-05-17 | 安徽萃英兰萌生物科技有限公司 | Novel high-efficiency biological algistat |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1824611A (en) * | 2006-01-26 | 2006-08-30 | 中国科学院等离子体物理研究所 | Composite type inorganic polymer water quality purifier and method of magnetic gathering algae eliminating |
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2007
- 2007-08-10 CN CN2007100497226A patent/CN101362613B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1824611A (en) * | 2006-01-26 | 2006-08-30 | 中国科学院等离子体物理研究所 | Composite type inorganic polymer water quality purifier and method of magnetic gathering algae eliminating |
Non-Patent Citations (3)
| Title |
|---|
| Donald M. Anderson.Turning back the harmful red tide.Nature388.1997,388513-514. * |
| 刘振儒等.壳聚糖复合粘土矿凝聚铜绿微囊藻的研究.环境工程22 3.2004,22(3),80-82. |
| 刘振儒等.壳聚糖复合粘土矿凝聚铜绿微囊藻的研究.环境工程22 3.2004,22(3),80-82. * |
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| CN101362613A (en) | 2009-02-11 |
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Address after: 610045 No. 3, Wu Xing Road, Chengdu, Sichuan, Wuhou District Patentee after: CSCEC Huanneng Technology Co., Ltd Address before: 610045 No. 3, Wu Xing Road, Chengdu, Sichuan, Wuhou District Patentee before: Ring energy Polytron Technologies Inc |
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