CN101734775A - Method for treating algal bloom by using modified attapulgite as flocculant - Google Patents
Method for treating algal bloom by using modified attapulgite as flocculant Download PDFInfo
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- CN101734775A CN101734775A CN200910251731A CN200910251731A CN101734775A CN 101734775 A CN101734775 A CN 101734775A CN 200910251731 A CN200910251731 A CN 200910251731A CN 200910251731 A CN200910251731 A CN 200910251731A CN 101734775 A CN101734775 A CN 101734775A
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- flocculation agent
- attapulgite
- algae
- hydrochloric acid
- flco
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Abstract
The invention discloses a method for treating algal bloom by using modified attapulgite as flocculant, comprising the following steps: dipping the attapulgite powder into hydrochloric acid for 23-25h according to the ratio of solid to liquid being 1-3:2-4, drying, pulverizing into powder to obtain flocculant; adding the flocculant into algae water, stirring, standing, and then removing algae floc by a filtering or spooning method. The invention can effectively adsorb flocculating algae, thereby being convenient to remove algae floc by the filtering or spooning method, and having obvious effect on removing nitrogen and phosphorus in water body; the method can treat both the principal and secondary aspects, fundamentally removes danger caused by algal bloom storm, and has low cost, thereby having great application value and market potential.
Description
Technical field
The present invention relates to biological environmental production material field, specifically is attapulgite modified method of administering algal tufa as flocculation agent.
Background technology
In recent years, China's water body in lake algal tufa frequently breaks out, and grows in intensity, and life brings inconvenience to human being's production, has had a strong impact on social and economic development, has become a kind of eco-catastrophe.Cause that main nutrient elements that algal tufa breaks out is that nitrogen, phosphorus, particularly phosphorus in the water body plays critical effect.Remove the algal bloom method than popular at present and roughly can be summed up as physics method, chemical method and biological process:
The physics method: physical method is (as high pressure ionization, high-voltage pulse, alternating intense magnetic field, ultraviolet ray, ultrasonic wave etc.) be to be converted into chemical energy with electric energy, change molecular structure and the character enter water body or water body material, reach and kill and wound, kill impurity in algae and decomposition, the adsorbed water body, reach the purpose that purifies water system.This advantage is not destroyed water body, noresidue, but physics to kill and wound be relation of equal quantity, it is big more to kill and wound life entity, consumption is many more, it is many more to kill and wound many more energy consumptions, water quality impurity is many more, it is many more to consume energy.The method that comprises mechanical process in addition or manually salvage algae and take to dredge, the former can only can not tackle the problem at its root as easy supplementary means, and expends a large amount of manpower and materials, has little effect.
Chemical method: mainly be to adopt various chemical algae removing agent, its most pronounced effects, but also have most danger, thus very prudent when using, in strict accordance with the consumption operation that requires, otherwise can cause serious consequence.Because the chemical ingredients of these algicide is the copper compound of processable, perhaps chelated copper class material, these compounds produce injury to a certain degree even cause death the Shui nationality such as fish pasture and water are biological, and carcinogenesis is arranged, and also can produce other some uncertain bad sequela.
Biological process: the biological restoration algicide is at tens kinds of living microorganisms and the corresponding enzyme of handling eutrophication water, it is a kind of pure biotechnological formulation of All Pure Nature, the hydrobiont in the water body and the mankind etc. are not produced any harm and side effect, in a single day product drops into water body, the algae competition nutrition source in rapid activation of the microorganism in the product and the water, thus make algae lack nutrition death, sink under water, increasing microorganism continues the dead algae of degraded, until elimination, makes water body become clear.But biological process particularly the method for restoration of the ecosystem among a small circle, the control of algal tufa is an important method in the FX, but these class methods often need to drop in advance huge artificial engineering, to create and control suppresses the condition of required waterplant of algal tufa (bottom low in transparency as submerged plant or that lack suitable bed mud is difficult to existence) or animal survival, thereby take effect slow, cost is high, the difficult improvement that generally is applicable to big area, sudden algal tufa.
Above several method, though can play the effect of alleviation to a certain extent to wawter bloom, they exist cost height, operation inconvenience or cause secondary pollution problems, become the bottleneck that restricts their large-scale application.
Attapulgite is earthy, compact mass originates in sedimentogeneous rock and the weathering crust, be white in color, canescence, Steel Gray, greyish-green or weak satin luster, the soil property exquisiteness has oily soapy, light weight, property are crisp, fracture is conchoidal or irregular shape, and water-absorbent is strong, toughness and plasticity-when wet, dry post shrinkage is little, the little crackle that shows, the water logging bubble collapses diffusing, and suspension is met not flocculation sediment of dielectric medium.Because of place of production difference, the composition of attapulgite clay is slightly different, generally speaking, the attapulgite that contains 70-80% in the attapulgite original soil, the montmorillonite of 10-15% and sepiolite and other clay, the quartz of 4-8%, the calcite of 1-5% or rhombspar, the non-clay composition is removed in the process of processing.Therefore, the attapulgite that contains 85-90% in the final product.W.F.Bradley in 1940 have proposed the crystal structure model of attapulgite first.The essential structure unit of attapulgite is formed by the silicon-oxy tetrahedron that is parallel to the carbon axle is double-stranded, and each interchain connects by Sauerstoffatom, and the sexavalence coordination by one deck magnesium atom between each double-stranded levels connects.The every quartet alternatively up and down of the sensing of silicon-oxy tetrahedron active oxygen atom (being the top, angle of silicon-oxy tetrahedron) is arranged, the result of Pai Lieing like this, tetrahedral sheet is linked continuously at interchain, constitute and connect layered silicate, yet octahedral sheet is discontinuous, forms a lot of rectangles duct, the cross-sectional sizes in each duct equates, is approximately 0.38nm * 0.63nm.The desirable chemical formula of attapulgite is Al (OH
2)
4(OH)
2Mg
5Si
84H
2O, Si wherein
4+Can be on a small quantity by Fe
3+And Al
3+Ion substitution, Mg
2+Can be on a small quantity by Fe
2+, Fe
3+And Al
3+Ion substitution.The synthesis result of various ion substitutions is that attapulgite usually is with a spot of negative charge, and this kind electric charge belongs to structure charge.
Summary of the invention
The invention provides a kind of attapulgite modified method of administering algal tufa as flocculation agent, with the attapulgite is base mateiral, prepare a kind of flocculation agent, adsorption-flocculation algae effectively, thereby be convenient to the algae flco be shifted out water body, and, can accomplish to treat both principal and secondary aspect of disease nitrogen, phosphorus removal effect highly significant in the water body by the method for filtering or salvage, fundamentally remove algal tufa and break out the harm that brings, have bigger using value and market potential.
Technical scheme of the present invention is:
Attapulgite modified method of administering algal tufa as flocculation agent is characterized in that: be with the attapulgite powder according to (1-3): solid-liquid volume ratio (2-4) is immersed in 23-25h in the hydrochloric acid, and is dry then, pulverize powdered and get flocculation agent; This flocculation agent added in the algae water stir, leave standstill, by the method for filtering or salvage the algae flco is shifted out water body then.
Described attapulgite modified method of administering algal tufa as flocculation agent, it is characterized in that: described attapulgite powder is according to (1-3): solid-liquid volume ratio (2-4) is immersed in 23-25h in the hydrochloric acid, and dry under 100-110 ℃, pulverize powdered to be flocculation agent; This flocculation agent added in the algae water according to the ratio of 0.5-2g/L stir, leave standstill, pull flco out water body with 10-50 order gauze until there being obvious flco to generate.
Described attapulgite modified method of administering algal tufa as flocculation agent, it is characterized in that: described attapulgite powder is according to (1-3): solid-liquid volume ratio (2-4) is immersed in 23-25h in the hydrochloric acid, and dry under 100-110 ℃, pulverize powdered to be flocculation agent; This flocculation agent added in the algae water according to the ratio of 0.5-2g/L stir, leave standstill until there being obvious flco to generate, the quartz sand filtering layer by 0.2-1 rice thickness filters.
Described attapulgite modified method of administering algal tufa as flocculation agent, it is characterized in that: the particle diameter of described attapulgite powder is the 100-300 order; The concentration of described hydrochloric acid is 5-7mol/L.
Principle of the present invention is that hydrochloric acid is attapulgite modified, can be used as flocculation agent and handle algae water, specifically be that hydrochloric acid can change into the material with flocculation activity with elements such as the iron in the attapulgite crystalline structure, aluminium and silicon, can with the frustule in the water body and other suspended contaminant by polymer build bridge, volume is swept, net is caught and the effect of charge neutrality is flocculated, the flco that formation has the complex three-dimensional network structure.The pore passage structure of the nano stick crystal inside of attapulgite and the micro-nano level gap structure between the excellent crystalline substance have determined it to have bigger specific surface area, pollutents such as nitrogen, phosphorus had stronger adsorption activity, both they can be adsorbed on its inside, duct, also can be adsorbed onto in the space between the excellent crystalline substance, thereby can it be shifted out water body by salvaging or filtering method, reach the effect of removal.
Useful achievement of the present invention and innovation part:
1, with low cost: the attapulgite reserves are abundant, and production cost is low, are fit to large-scale application;
2, remove the efficient height: the attapulgite specific surface area is big, has higher absorption and removes activity, and the frustule clearance reaches more than 90%; Total nitrogen, total tp removal rate reach more than 40%; The COD clearance reaches more than 50%; Turbidity removes rate and reaches more than 60%;
3, environmental friendliness: attapulgite is natural nonpollution material, adds water body to, can not cause secondary pollution to environment.
Embodiment
Attapulgite modified method of administering algal tufa as flocculation agent:
Embodiment 1
100-300 purpose attapulgite powder is immersed in 24h in the hydrochloric acid of 6mol/L according to the solid-liquid volume ratio of 1-3: 2-4, and in 105 ℃ dry down, pulverize powdered and be flocculation agent.This flocculation agent is added in the algae water according to the ratio of 0.5-2g/L, stirred 2-5 minute, leave standstill, pull flco out water body with 10-50 order gauze until there being obvious flco to generate with 60-120 rev/min of speed.
Embodiment 2
100-300 purpose attapulgite powder is immersed in 24h in the hydrochloric acid of 6mol/L according to the solid-liquid volume ratio of 1-3: 2-4, and in 105 ℃ dry down, pulverize powdered and be flocculation agent.This flocculation agent is added in the algae water according to the ratio of 0.5-2g/L, stirred 2-5 minute with 60-120 rev/min of speed, leave standstill until there being obvious flco to generate, the quartz sand filtering layer by 0.2-1 rice thickness filters flco.
Claims (3)
1. attapulgite modified method of administering algal tufa as flocculation agent is characterized in that: be with the attapulgite powder according to (1-3): solid-liquid volume ratio (2-4) is immersed in 23-25h in the hydrochloric acid, and is dry then, pulverize powdered and get flocculation agent; This flocculation agent added in the algae water stir, leave standstill, by the method for filtering or salvage the algae flco is shifted out water body then.
2. attapulgite modified method of administering algal tufa as flocculation agent according to claim 1, it is characterized in that: described attapulgite powder is according to (1-3): solid-liquid volume ratio (2-4) is immersed in 23-25h in the hydrochloric acid, and dry under 100-110 ℃, pulverize powdered to be flocculation agent; This flocculation agent added in the algae water according to the ratio of 0.5-2g/L stir, leave standstill, pull flco out water body with 10-50 order gauze until there being obvious flco to generate.
3 attapulgite modified methods of administering algal tufa as flocculation agent according to claim 1, it is characterized in that: described attapulgite powder is according to (1-3): solid-liquid volume ratio (2-4) is immersed in 23-25h in the hydrochloric acid, and dry under 100-110 ℃, pulverize powdered to be flocculation agent; This flocculation agent added in the algae water according to the ratio of 0.5-2g/L stir, leave standstill until there being obvious flco to generate, the quartz sand filtering layer by 0.2-1 rice thickness filters.
4. according to the described attapulgite modified method of administering algal tufa as flocculation agent of one of claim 1 to 3, it is characterized in that: the particle diameter of described attapulgite powder is the 100-300 order; The concentration of described hydrochloric acid is 5-7mol/L.
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Cited By (12)
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CN102219334A (en) * | 2011-03-04 | 2011-10-19 | 扬州大学 | Method and device for processing in-situ pollutant at tail end of rainwater pipe network |
CN103145210A (en) * | 2013-03-25 | 2013-06-12 | 苏州绿世界园林发展有限公司 | Environment-friendly sewage nitrogen and phosphorus removal cleaning agent and preparation method thereof |
CN103274509A (en) * | 2013-05-27 | 2013-09-04 | 天津市金鳞水处理科技有限公司 | Preparation method of composite flocculant capable of adsorbing heavy metal ions and composite flocculant product through |
CN103449586A (en) * | 2013-09-05 | 2013-12-18 | 合肥市东方美捷分子材料技术有限公司 | Fiber base modified non-metallic mineral soil flocculant |
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CN105776479A (en) * | 2016-05-16 | 2016-07-20 | 叶君芝 | Efficient sewage treatment agent |
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CN108383220A (en) * | 2018-02-09 | 2018-08-10 | 同济大学 | A kind of method of sewage microalgae and synchronous nitrogen and phosphorus trapping recycling |
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CN111320225A (en) * | 2020-03-04 | 2020-06-23 | 生态环境部华南环境科学研究所 | Method for rapidly treating algae in eutrophic water body |
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CN102219334A (en) * | 2011-03-04 | 2011-10-19 | 扬州大学 | Method and device for processing in-situ pollutant at tail end of rainwater pipe network |
CN103145210A (en) * | 2013-03-25 | 2013-06-12 | 苏州绿世界园林发展有限公司 | Environment-friendly sewage nitrogen and phosphorus removal cleaning agent and preparation method thereof |
CN103274509A (en) * | 2013-05-27 | 2013-09-04 | 天津市金鳞水处理科技有限公司 | Preparation method of composite flocculant capable of adsorbing heavy metal ions and composite flocculant product through |
CN103449586B (en) * | 2013-09-05 | 2015-07-15 | 合肥市东方美捷分子材料技术有限公司 | Fiber base modified non-metallic mineral soil flocculant |
CN103449586A (en) * | 2013-09-05 | 2013-12-18 | 合肥市东方美捷分子材料技术有限公司 | Fiber base modified non-metallic mineral soil flocculant |
CN103601278A (en) * | 2013-11-29 | 2014-02-26 | 安徽师范大学 | Algaecide, and preparation method and application thereof |
CN103601278B (en) * | 2013-11-29 | 2015-07-08 | 安徽师范大学 | Algaecide, and preparation method and application thereof |
CN105776479A (en) * | 2016-05-16 | 2016-07-20 | 叶君芝 | Efficient sewage treatment agent |
CN106035395A (en) * | 2016-06-02 | 2016-10-26 | 安徽师范大学 | Preparing method of algicide base material, algicide and preparing method and application of algicide |
CN108383220A (en) * | 2018-02-09 | 2018-08-10 | 同济大学 | A kind of method of sewage microalgae and synchronous nitrogen and phosphorus trapping recycling |
CN108423781A (en) * | 2018-03-21 | 2018-08-21 | 安徽雷克环境科技有限公司 | A kind of preparation method and application of magnetic flocculant |
CN111320225A (en) * | 2020-03-04 | 2020-06-23 | 生态环境部华南环境科学研究所 | Method for rapidly treating algae in eutrophic water body |
CN111410282A (en) * | 2020-03-31 | 2020-07-14 | 华南理工大学 | Superfine powder flocculant for treating algae in eutrophic water and preparation method thereof |
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CN112079481A (en) * | 2020-09-04 | 2020-12-15 | 南京理工大学 | Water target way circulating water treatment system |
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