CN100562351C - Be used to remove the filter medium and preparation method thereof of Microcystin and the filter core of making by this filter medium - Google Patents
Be used to remove the filter medium and preparation method thereof of Microcystin and the filter core of making by this filter medium Download PDFInfo
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- CN100562351C CN100562351C CNB2007101230585A CN200710123058A CN100562351C CN 100562351 C CN100562351 C CN 100562351C CN B2007101230585 A CNB2007101230585 A CN B2007101230585A CN 200710123058 A CN200710123058 A CN 200710123058A CN 100562351 C CN100562351 C CN 100562351C
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Abstract
A kind of preparation method of filter medium, after comprising that gas generation agent with the modified zeolite powder of the rectorite powder of the active carbon of the ultra-high molecular weight polyethylene of 60～500 weight portions, 20～300 weight portions, 10～150 weight portions, 5～200 weight portions, 0～50 weight portion fully mixes, cool off after 60～150 minutes at 180～280 ℃ of sintering temperatures.Prepare filter medium or filter core with above-mentioned method, can be used to remove Microcystin in the water.The present invention has realized non-secondary pollution, has been used to remove Microcystin expeditiously, and the filter core of making is easy to use, with low cost.Adopt after the present invention purifies water quality after testing, the removal efficient of Microcystin reaches more than 96%.
Description
Technical field
The present invention relates to a kind of filter medium and preparation method thereof, also relate to the filter core that constitutes by this filter medium, also relate to a kind of method that adopts filter medium of the present invention or filter core to remove Microcystin in the water.
Background technology
Many lakes of China's the South and the North and reservoir outburst blue-green alga bloom, one of main harm that pollution causes is the multiple algae toxin that discharges based on Microcystin.(Microcystin MCs) is the frustule endotoxin to Microcystin, and after frustule aging, the death, the algae toxin is discharged in the water body.Microcystin is the algae toxin that class frequency of occurrences in blue-green alga bloom is the highest, work the mischief the most serious, and the mankind's liver is had very strong toxicity, has very strong carcinogenesis.Microcystin is the activity of CKIs phosphatase consumingly, and its toxicity can be suitable with the chemical classes organophosphate nerve agent.Therefore remove the harm of Microcystin to human body, purifying water also seems particularly important.
Publication number is that the Chinese invention patent of CN1562821A discloses the method for eliminating Microcystin in a kind of water body.This method comprises the following steps: at first the algae in the water body to be filtered, clarifies with sandstone, reduces suspension and Microcystis aeruginosa cell number in the water; Next is a plant absorbing process, by cultivation the sandy soil device of hygrophyte is arranged, and absorbs to decompose a part of organic impurities and Microcystin; The 3rd is by absorbent charcoal adsorber, further eliminates suspension and Microcystis aeruginosa cell in the water; The 4th is ozone treatment, takes the logical method that contains the air of high-concentrated ozone; The 5th is the detection of handling Microcystin in the water sample of back, and the method that adopts high performance liquid chromatography to detect detects the content of Microcystin in the drinking water.The method is subject to situation restrictions such as geography, weather, and technology is comparatively complicated, and disposal cost is higher.
Publication number is that the Chinese invention patent of CN1359862A discloses the collaborative method of removing Microcystin in the water of a kind of high ferro-photochemical catalytic oxidation.This method comprises the following steps: to comprise: add ferrate in the algae-containing water of pH=6～10, and stir; Reacted 10～30 minutes; Algae-containing water after handling is changed in the photo catalysis reactor, and the photochemical catalyst of 0～5 grams per liter amount that suspends was regulated pH value to 2～6 of algae-containing water in algae-containing water, with uviol lamp or solar light irradiation 1～3 hour.Owing to will add ferrate and photochemical catalyst in the processing procedure, caused secondary pollution, treatment process is also comparatively complicated.
Summary of the invention
The filter core that the technical problem to be solved in the present invention is to provide a kind of easy to use, non-secondary pollution, high efficiency filter medium and preparation method thereof and is made by this filter medium.The present invention also provides a kind of method that adopts filter medium of the present invention or filter core to remove Microcystin in the water.
In order to solve the problems of the technologies described above, the present invention by the following technical solutions:
A kind of preparation method of filter medium, comprise the ultra-high molecular weight polyethylene of 60～500 weight portions, the active carbon of 20～300 weight portions, the rectorite powder of 10～150 weight portions, the modified zeolite powder of 5～200 weight portions, the gas generation agent of 0～50 weight portion are fully mixed, after the compacting,, be cooled to 30～50 ℃ and obtain after 60～150 minutes at 180～280 ℃ of sintering temperatures.Preferred 190～230 ℃ of sintering temperature.
As preferably, gas generation agent is at least a in Celogen Az, food-grade carbonic hydroammonium, the oxalic acid.Above-mentioned three kinds of gas generation agents can play pore-creating, make the effect in chamber behind sintering, wherein preferred food product level carbonic hydroammonium.
The polyethylene of General Definition 1,500,000～7,000,000 is a ultra-high molecular weight polyethylene, preferred 250～4,000,000 the ultra-high molecular weight polyethylene of the present invention.Compare with low molecular weight polyethylene, a notable feature is that ultra-high molecular weight polyethylene has powerful electrostatic adsorption, trickle, superfine particle that adsorbable microfiltration can not block.As preferably, the molecular weight of ultra-high molecular weight polyethylene is 250～4,000,000, and particle diameter is 74～420 microns.
Active carbon can efficiently adsorb organic matter, heavy metal, the heterochromatic peculiar smell in the drinking-water, selects for use medical activated carbon can guarantee that filter medium is directly used in the processing of drinking water.As preferably, it is 44～178 microns medical activated carbon that active carbon is selected particle diameter for use.
Facts have proved that active carbon mixes with ultra-high molecular weight polyethylene to use and can produce cooperative effect, its filtration, adsorption effect can be more remarkable, and be not only the simple superposition of both performances.
Natural zeolite is the general name of moisture porous silicate, its crystalline texture mainly is to be made of silicon-oxy tetrahedron, wherein part tetravalence silicon ion is replaced by trivalent aluminium ion, cause the negative electrical charge surplus, the ion that therefore alkali metal (or alkaline-earth metal) isoequilibrium electric charge is arranged in the structure, the vestibule and the duct of certain pore size are arranged in the zeolite framework simultaneously, determined it to have character such as absorption, ion-exchange.
During modification, earlier natural zeolite powder is cleaned up with deionized water, dry, take by weighing the zeolite of certain mass, be immersed in the certain density modifier (solution), fully stirring is no less than 2 hours, and the filtration of neutralization back cleans up dry for standby with deionized water.
Modifier can be the HCl of 0.05～0.30mol/L, the H of 0.01～0.05mol/L
2SO
4, the NaCl of 0.2～1.0mol/L, the NaOH of 0.05～0.25mol/L, or the mixed solution of the NaCl of the HCl of 0.03～0.15mol/L and 0.2～1.0mol/L.When modifier was HCl and NaCl mixed solution, optium concentration NaCl was 0.8mol/L, and HCl is 0.09mol/L, adopted modifier should be no less than 2 hours usually to the time that zeolite carries out the modification processing, preferably was no less than 4 hours, and this moment, correctability was fully complete.
Zeolite can be removed impurity contained in the mineral and DDGS after modification is handled, etch abundant hole and vestibule in mineral structure, increases its specific area, thus character such as the absorption of raising zeolite, ion-exchange.As preferably, the particle diameter of modified zeolite powder is 44～124 microns.
As preferably, the rectorite powder directly is 44～124 microns.
The crystal chemistry general formula of rectorite is: K
x(H
2O) { Al
2[Al
xSi
4-xO
10] (OH)
2, be 1: 1 regular interbed mineral of octahedra mica and octahedra montmorillonite, place of production difference, its composition is slightly different, China Hubei (Zhongxiang City, Suixuan County, grand in, the Nanzhang), all there is this mineral matter storage on Guangxi (moral fort), (Leiyang) and other places, Hunan.As the structural formula that calculates according to the chemical composition of Zhongxiang City's rectorite be:
Mica layer: (Na
0.79K
0.39Ca
0.26)
1.14Al
4[Si
6Al
2]
8O
22
Montmorillonite layer: (Ca
0.55Na
0.02K
0.01Mg
0.03)
0.61(Al
4.1Fe
2+ 0.09Mg
0.07)
4.26[Si
6.46Al
1.54]
8O
22
Rectorite has cation exchange as montmorillonite, imbibition, slurrying etc., has again as performances such as the heat-resisting quantity of mica and slickness.Because the montmorillonite layer in the rectorite crystal structure has a layer negative electrical charge, show electrode makes it can adsorb various inorganic ions, polar organic molecule and gas molecule.
Modified zeolite powder and rectorite powder all have extremely strong adsorption capacity to Microcystin.
The adsorption capacity of modified zeolite powder, rectorite powder and active carbon also has much relations with its particle diameter; particle diameter is excessive, the specific area of particle is reduced, and particle diameter is too small meticulous; can influence the sintering effect of filter medium and absorption, filter effect, fine particle is understood block pores and duct.Practice shows that also the particle size distribution range of modified zeolite powder is unsuitable wide, and the difference between particle grain size continuous distributed and the particle diameter is not more than under 50% the situation, can obtain better effect; Also there are same rule in rectorite powder, active carbon.
The present invention also provides following technical scheme: prepare filter medium with above-mentioned method, this filter medium is used to make filter core; Filter medium and filter core can be used for removing Microcystin in the water.
With respect to prior art, the invention has the advantages that the filter medium of preparation and filter core except can purifying water, also realize non-secondary pollution, be used to remove Microcystin expeditiously.Adopt the water quality after the present invention purifies to detect through the method for high performance liquid chromatography, the removal efficient of Microcystin reaches more than 96%.
The specific embodiment
For further understanding technical characterictic of the present invention and content, the preparation of filter core is elaborated below in conjunction with embodiment.
For clearer description the present invention, in specific embodiment, adopted the unit of order number (Mesh).It is generally acknowledged that order is meant the number in every square of hole on the inch screen cloth, except the eyelet of expression screen cloth, it is used to represent to pass through the particle diameter of the particle of screen cloth simultaneously, and the order number is high more, and particle diameter is more little.The present invention is with reference to the data table of comparisons (table 1) of order number in the following table and granularity.
Table 1 particle diameter unit: μ m (micron)
| The order number | Particle diameter μ m | The order number | Particle diameter μ m | The order number | Particle diameter μ m | The order number | Particle diameter μ m |
| 25 | 710 | 50 | 297 | 140 | 104 | 325 | 44 |
| 30 | 590 | 60 | 250 | 170 | 89 | 400 | 38 |
| 35 | 500 | 80 | 178 | 200 | 74 | 460 | 30 |
| 40 | 420 | 100 | 150 | 230 | 61 | 540 | 26 |
| 45 | 350 | 120 | 124 | 270 | 53 | 650 | 21 |
Embodiment 1
Granularity is that 140～170 orders (can be by 140 purpose sieve apertures but cannot pass through 170 purpose sieve apertures, below identical) medical activated carbon 90 gram, molecular weight is 3,000,000, granularity is 100～140 purpose ultra-high molecular weight polyethylenes, 200 grams, granularity is 170～200 purpose modified zeolite powders, 30 grams, Zhongxiang City, granularity 140～170 purpose Hubei produces rectorite powder 20 grams, food-grade carbonic hydroammonium 40 grams, after the agitator of putting into cooling device stirs 90 minutes at a slow speed, pack in the tubular die, extrusion modling, after 120 minutes, be cooled to 40 ℃ of demouldings at 220 ℃ of sintering temperatures, can become the tubulose filter core of many minute apertures.
Embodiment 2
Granularity is 120～140 purpose medical activated carbons, 80 grams, molecular weight is 2,500,000 ultra-high molecular weight polyethylene 150 grams, granularity is 140～170 purpose modified zeolite parts, 10 grams, and granularity is that rectorite powder 40 grams are produced in Leiyang, 170～200 purpose Hunan, food-grade carbonic hydroammonium 45 grams, after the agitator of putting into cooling device stirs 90 minutes at a slow speed, pack in the tubular die, extrusion modling is at 210 ℃ of sintering temperatures after 150 minutes, be cooled to 40 ℃ of demouldings, can become the tubulose filter core of many minute apertures.
More than filter medium provided by the present invention and preparation method thereof and the filter core made by this filter medium are described in detail.Used specific embodiment in this specification principle of the present invention and embodiment have been set forth, for one of ordinary skill in the art, according to the thought of the present invention part that may in implementation process, can change in specific embodiments and applications.In sum, this description should not be construed as limitation of the present invention.
Claims (9)
1, a kind of preparation method of filter medium, comprise with 60～500 weight portion molecular weight being that 250～4,000,000 ultra-high molecular weight polyethylene, the active carbon of 20～300 weight portions, the rectorite powder of 10～150 weight portions, the modified zeolite powder of 5～200 weight portions, the gas generation agent of 0～50 weight portion fully mix, compacting is cooled off after 60～150 minutes at 180～280 ℃ of sintering temperatures then.
2, preparation method according to claim 1, gas generation agent is at least a in Celogen Az, food-grade carbonic hydroammonium, the oxalic acid.
3, preparation method according to claim 1, the particle diameter of rectorite powder is 44～124 microns.
4, preparation method according to claim 1, the particle diameter of modified zeolite powder is 44～124 microns.
5, preparation method according to claim 1, the particle diameter of ultra-high molecular weight polyethylene is 74～420 microns.
6, preparation method according to claim 1, active carbon is that particle diameter is 44～178 microns a medical activated carbon.
7, the filter medium that obtains of preparation method according to claim 1.
8, the filter core that constitutes by the described filter medium of claim 7.
9, a kind of method of removing Microcystin in the water comprises and uses described filter medium of claim 7 or the described filter core of claim 8.
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| CN101596448B (en) * | 2008-06-03 | 2011-07-27 | 周奇迪 | Filter medium for removing nitrate in water and preparation method thereof |
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| CN101844007B (en) * | 2009-03-27 | 2011-10-26 | 周奇迪 | Filter medium and preparation method thereof, filter element and water purification device |
| CN101898115B (en) * | 2009-05-25 | 2011-09-21 | 周奇迪 | Filter medium, preparation method thereof, filter element and water purification device |
| CN101898118B (en) * | 2009-05-25 | 2012-05-23 | 奇迪电器集团有限公司 | Filter medium and preparation method thereof, filter element, water purifier and water dispenser |
| CN102219276B (en) * | 2011-04-29 | 2012-07-25 | 中国地质大学（武汉） | Blue-green algae scavenging agent using polystyrene foam as carrier and capable of floating on water surface |
| CN102249369B (en) * | 2011-04-29 | 2012-07-25 | 中国地质大学（武汉） | Pumice-carried cyanobacteria scavenger capable of floating on water surface |
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