CN103820123A - Microbial sand-fixing dust depressor and preparation method thereof - Google Patents
Microbial sand-fixing dust depressor and preparation method thereof Download PDFInfo
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- CN103820123A CN103820123A CN201410042688.XA CN201410042688A CN103820123A CN 103820123 A CN103820123 A CN 103820123A CN 201410042688 A CN201410042688 A CN 201410042688A CN 103820123 A CN103820123 A CN 103820123A
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Abstract
The invention provides a microbial sand-fixing dust depressor and a preparation method thereof. The microbial sand-fixing dust depressor comprises the following components in percentage by mass: 0.8-2.5% of microbial powder, 3.0-5.0% of urea, 8.1-10.1% of calcium chloride and the balance of deionized water, wherein the microorganism in the microbial sand-fixing dust depressor is bacillus pasteurii powder. The preparation method comprises the following steps: proportionally mixing the calcium chloride with the deionized water, stirring till the calcium chloride is completed dissolved, adding the urea, and after the urea is dissolved, adding the bacillus pasteurii powder till the bacillus pasteurii powder is completely dissolved, thereby obtaining a mixed solution, namely the microbial sand-fixing dust depressor. Compared with the traditional inorganic sand-fixing agent, the microbial sand-fixing dust depressor is high in permeability; compared with the traditional organic sand-fixing agent, the microbial sand-fixing dust depressor has the characteristics of high ageing resistance, simplicity in preparation, convenience in construction and the like. Proved by desert sample tests, the sand-fixing dust depressor is high in ageing resistance and wind erosion resistance and has unconfined compressive strength higher than 1MPa. Proved by raise dust sample tests, the sand-fixing dust depressor has a good dust fixing effect.
Description
Technical field
The invention belongs to preventing and fixing sand, environmental pollution treatment technology field.Relate to a kind of microorganism and fix the sand dust-inhibitor, specifically microorganism and the composite a kind of novel microorganism of substrate are fixed the sand to dust-inhibitor.Microorganism is fixed the sand dust-inhibitor and is applicable to the domatic ecological protection of the particle side slopes such as loose sand, soil, the airborne dust in the places such as the desert treatment in control soil drifting, sandstorm area, building, road.
Background technology
In recent years, along with the accelerated development of desertification, cause increasing sandstorm.The airborne dust causing in various foundation works construction simultaneously and economical activities of mankind process, causes serious environmental pollution to atmospheric environment.Current conventional sand prevention dust-suppression method mainly contains three kinds of machinery, biological and chemicals.In above-mentioned three kinds of methods, mechanical sand prevention dust suppression cost is high, construction trouble; Although chemical process has, cost is low, instant effect, strong adaptability, in widespread attention, application and development, due to its common used material (grout class, easily drying shrinkage, be full of cracks, affect vegetation growth; Water glass class, gelation time is short, poor permeability, and bonding course intensity is low, destructible, poor durability; Other exist the easily problem such as aging take organic composition as the main dust-inhibitors that fix the sand) exist problem of all kinds to block it to further develop and apply.Sand control with biological measures is dustproof is the method for Zhi Genzhiben a kind of, but it is comparatively strict to region environmental requirement.And microorganism is fixed the sand dust-inhibitor and combines sand control with biological measures and Chemo-Therapy method for determining sand advantage, solved that environmental compatibility is poor, poor permeability, the shortcoming such as easily drying shrinkage, cracking, aging be poor, have that use properties is good, natural resources and energy resources consumption is few, with the plurality of advantages such as ecotope consistency is good, cheap, there is larger development potentiality and practicality.
Summary of the invention
Technical problem: the object of the invention is to provide that a kind of sand-fixing effect is good, perviousness is strong, resistance to deterioration is strong, environmentally safe, microorganism with low cost, that be convenient to preparation construction fix the sand dust-inhibitor and preparation method thereof, can effectively solve the problems such as Desertification, slope reinforcement and city raised dust.
Technical scheme: microorganism of the present invention is fixed the sand the technical scheme that dust-inhibitor takes and is:
By mass percentage, this dust-inhibitor is made up of following raw material:
Microbial germ powder 0.8%～2.5%, urea 3.0～5.0%, calcium chloride 8.1～10.1%, surplus is deionized water.
Described microbial germ powder be by Pasteur genus bacillus bacterium liquid after lyophilize, the bacterium powder of acquisition.
Microorganism of the present invention is fixed the sand the preparation method of dust-inhibitor and is: in proportion by calcium chloride and deionized water mix and blend, until after calcium chloride dissolves completely, add therein again urea, after urea dissolves, add again Pasteur genus bacillus bacterium powder, until bacterium powder dissolves completely, gained mixing solutions is that microorganism is fixed the sand dust-inhibitor.
When construction, the microorganism preparing is fixed the sand to dust-inhibitor and be evenly sprayed on sand grain, airborne dust surface, fixing the sand dust-inhibitor infiltrates after the 1～5cm thickness of surface, forms the bonding course of suitable thickness, cuts off drift sand, airborne dust contacts with wind, play fix the sand, the effect of dust suppression.
The present invention fixes the sand dust suppression mechanism and is: microorganism (Pasteur genus bacillus) is fixed the sand to dust-inhibitor and be sprayed onto after sand, soil, airborne dust, due to Pasteur genus bacillus urease-producing, can promote that urea decomposition forms carbanion, the while reacts with the calcium ion in solution, forms calcium carbonate.The precipitation of calcium carbonate forming is fast at husky, soil, the surperficial and inner formation spacial framework of airborne dust, and filler particles internal void also wraps up sandy soil particle, soil particle is bonded to network-like structural entity, and then forms certain thickness bonding course on top layer.
Beneficial effect: the present invention, has the following advantages compared with dust-inhibitor with existing fixing the sand:
1, fix the sand compared with dust-inhibitor with conventional grout, water glass etc. is inorganic, it is comparatively slow that microorganism cells regulation and control form calcium carbonate crystal speed, and the crystalline size less (10 μ m left and right) simultaneously forming, has better perviousness, and then making it process degree of depth raising, treatment effect increases;
2, fix the sand compared with dust-inhibitor with at present conventional organic polymer material class etc. is organic, it is simple that microorganism is fixed the sand dust-inhibitor moiety, and preparation technology is easy.What form on sand grain, airborne dust surface in addition is inorganic mineral calcium carbonate, and then makes its ageing resistance good.
3, compared with existing sand consolidation with biologic dust suppression, microorganism is fixed the sand dust-inhibitor does not have special requirement to territorial environment, simultaneously low, the instant effect of cost, strong adaptability.
4, adopt the present invention to fix the sand dust-inhibitor and fix the sand after dust suppression, the cured layer forming has good weather-proof, resistance to deterioration, frost resistance, and has better water-permeable, water-absorbent, is beneficial to vegetation growth.Microorganism fix the sand dust-inhibitor combine biology, chemistry two kinds of methods advantage, embodied the double benefit that ecological, environmental protective and processing efficiency are high.In addition, easy construction of the present invention, practical, can be applicable to desert treatment, the fields such as control airborne dust.
Embodiment
Embodiment 1:
(1) by mass percentage, 9.3% calcium chloride is joined in 85% water, stir after it dissolves completely, add therein again 5.0% urea, after it dissolves completely, then add 1.7% Pasteur genus bacillus bacterium powder, stirring treats that it dissolves completely, can obtain sand-fixation agent of the present invention.Whole reaction process is all carried out at normal temperatures.
(2) sand-fixation agent the present embodiment being made carries out bonding course hardness and unconfined compressive strenght test.
1. bonding course hardness test
Adopt LX-D type Shore durometer to carry out hardness test to the husky sample after solidifying.Method is as follows: getting husky sample 100g(particle diameter is 0.15～0.30mm), putting into diameter is 95mm culture dish, paves compacting.Then measuring 15mL microorganism fixes the sand dust-inhibitor and is evenly sprayed on husky sample surface.To be infiltrated completely after, then repeat to spray microorganism and fix the sand dust-inhibitor.Then put it into (60 ℃) in baking oven, after 48 hours, its taking-up is carried out to hardness test, its result is as shown in table 1.
Table 1 microorganism is fixed the sand dust-inhibitor and fixes the sand rear bonding course hardness
As can be known from Table 1, after adding the sand-fixation agent prepared of the present invention 2 times, husky sample bonding course hardness has had and has increased substantially, when sand-fixation agent consumption reaches 4L/m
2time, husky sample bonding course hardness is increased to 28 by 0.
2. unconfined compressive strenght test
Getting husky sample 33g(particle diameter is 0.15～0.30mm), put into the syringe that diameter is 3cm, pave compacting.Then measuring 15mL microorganism fixes the sand dust-inhibitor and is evenly sprayed on husky sample surface.To be infiltrated completely after, then repeat to spray microorganism and fix the sand dust-inhibitor.Then put it into (60 ℃) in baking oven, after 48 hours, its taking-up is polished to surface to be measured.Adopt SANSCMT8502 microcomputer controlled electronic universal tester to measure its ultimate compression strength, loading rate is 1mm/min.Result is as shown in table 2.
Table 2 microorganism is fixed the sand the unconfined compression strength of dust-inhibitor after fixing the sand
As can be seen from Table 2, add sand-fixation agent prepared by the present invention, the ultimate compression strength of husky sample is all improved largely.In the time spraying 3 times, the ultimate compression strength of solidifying husky sample meets the requirement to sand fixing strength (1MPa) in the world.
Embodiment 2:
(1) by mass percentage, 10.1% calcium chloride is joined in 84% water, stirring is after it dissolves completely, add therein again 3.0% urea, after it dissolves completely, then add 2.5% Pasteur genus bacillus bacterium powder, stir and treat that it dissolves completely, can obtain sand-fixation agent of the present invention.Whole reaction process is all carried out at normal temperatures.
(2) sand-fixation agent the present embodiment being made carries out ageing resistance test.
Getting husky sample 33g(particle diameter is 0.15～0.30mm), put into the syringe that diameter is 3cm, pave compacting.Then measuring 15mL microorganism fixes the sand dust-inhibitor and is evenly sprayed on husky sample surface.To be infiltrated completely after, then repeat to spray microorganism and fix the sand dust-inhibitor.Then put it into (60 ℃) in baking oven, after 48 hours, its taking-up is polished to surface to be measured.Then the curing husky sample at 20cm place under the UV-lamp that is 300W with power irradiation is placed on.Under ultra violet lamp, the loss of strength of periodic measurement sample, result is as shown in table 3.
Table 3 microorganism is fixed the sand the weathering test result of dust-inhibitor after fixing the sand
As shown in Table 3, along with the prolongation of time of ultraviolet irradiation, solidify husky sample loss of strength rate and increase gradually.After irradiation 100h, solidifying husky sample ultimate compression strength rate of loss is that 1.9%, 200h is that 6.2%, 300h is 11.8%.Observe the aging pattern that solidifies husky sample simultaneously, find that husky sample does not have considerable change.This shows to adopt microorganism to fix the sand dust-inhibitor to have better resistance to deterioration.
Embodiment 3:
(1) by mass percentage, 8.3% calcium chloride is joined in 85% water, stir after it dissolves completely, add therein again 4.9% urea, after it dissolves completely, then add 2.0% Pasteur genus bacillus bacterium powder, stirring treats that it dissolves completely, can obtain sand-fixation agent of the present invention.Whole reaction process is all carried out at normal temperatures.
(2) sand-fixation agent the present embodiment being made carries out weathering test.
Getting husky sample 3000g(particle diameter is 0.15～0.30mm), put into the square iron pan that is of a size of 32cm × 22cm × 4.8cm, pave compacting.Then measuring 500mL microorganism fixes the sand dust-inhibitor and is evenly sprayed on husky sample surface.To be infiltrated completely after, then repeat to spray microorganism and fix the sand dust-inhibitor.Then put it into (60 ℃) in baking oven, after oven dry, be placed on the different angle of the front placement of industrial electric fan, carry out deflation with different wind speed, and measure the wind erosion quantity of different wind erosion times.By spraying number of times, wind erosion time, wind erosion angle and four factor design L9 (3 of wind erosion speed
4) orthogonal experiment.The content design of orthogonal experiment is in table 4.
Table 4 factor and level
With sand table simulation desert drift sand, the different angle of air-dry rear placement, carries out deflation with different wind speed, and measures the wind erosion quantity of its different wind erosion times.Test-results is as shown in table 5.
Table 5 microorganism is fixed the sand the wind erosion effect of dust-inhibitor after fixing the sand
As shown in Table 5, adopt microorganism to fix the sand dust-inhibitor husky sample after treatment surface all less than the vestige of significantly eroding, there is good wind erosion-resistance performance.
Embodiment 4:
(1) by mass percentage, 9.0% calcium chloride is joined in 85% water, stir after it dissolves completely, add therein again 4.5% urea, after it dissolves completely, then add 1.5% Pasteur genus bacillus bacterium powder, stirring treats that it dissolves completely, can obtain sand-fixation agent of the present invention.Whole reaction process is all carried out at normal temperatures.
(2) in the square iron pan that is of a size of 32cm × 22cm × 4.8cm, put into respectively building airborne dust and dust on the roads, then erode respectively and water washout test.
1. weathering test
Get a certain amount of building airborne dust and dust on the roads, place and be of a size of in the square iron pan of 32cm × 22cm × 4.8cm respectively, pave compacting.Then measuring respectively 100mL microorganism fixes the sand dust-inhibitor and is evenly sprayed on building airborne dust and dust on the roads surface.To be infiltrated completely after, then repeat to spray 3 microorganisms and fix the sand dust-inhibitor.Then the iron pan that building airborne dust and dust on the roads are housed is put into respectively to baking oven (60 ℃), after oven dry, be placed on distance industrial electric fan 20cm place, carry out deflation with 10m/s wind speed, after deflation 30min, measure residue building airborne dust and dust on the roads amount in iron pan, judge its wind erosion-resistance performance.After wind erosion, test-results is as shown in table 6.
Table 6 microorganism is fixed the sand the wind erosion result after dust-inhibitor dust suppression
As shown in Table 6, fix the sand through microorganism the airborne dust that dust-inhibitor processed for 4 times, it is at 10m/s wind speed, is blown under 0 ° of angle and can suppresses airborne dust completely, and effect is remarkable.
2. water washout test
Get a certain amount of building airborne dust and dust on the roads, place and be of a size of in the square iron pan of 32cm × 22cm × 4.8cm respectively, pave compacting.Then measuring respectively 100mL microorganism fixes the sand dust-inhibitor and is evenly sprayed on building airborne dust and dust on the roads surface.To be infiltrated completely after, then repeat to spray 3 microorganisms and fix the sand dust-inhibitor.Then the iron pan that building airborne dust and dust on the roads are housed is put into respectively to baking oven (60 ℃), after oven dry, be positioned under water tap and carry out washout test.Iron pan placed angle is 30 °, and simulated rainfall intensity is 3L/min, and rain time is 1min.Finally the sample after having washed away is put into oven for drying 24h, claim its residue airborne dust quality, calculate its mass loss rate.
Airborne dust water washout test result is as shown in table 7.Microorganism is fixed the sand dust-inhibitor and has improved to a great extent airborne dust erosion resistibility as can be seen from the table.
Table 7 microorganism is fixed the sand dust-inhibitor dust suppression washout test result
Claims (3)
1. microorganism is fixed the sand a dust-inhibitor, it is characterized in that, by mass percentage, this dust-inhibitor is made up of following raw material:
Microbial germ powder 0.8%～2.5%, urea 3.0～5.0%, calcium chloride 8.1～10.1%, surplus is deionized water.
2. microorganism according to claim 1 is fixed the sand dust-inhibitor, it is characterized in that described microbial germ powder for by Pasteur genus bacillus bacterium liquid after lyophilize, the bacterium powder of acquisition.
3. a microorganism as claimed in claim 1 is fixed the sand the preparation method of dust-inhibitor, it is characterized in that: in proportion by calcium chloride and deionized water mix and blend, until after calcium chloride dissolves completely, add therein again urea, after urea dissolves, add Pasteur genus bacillus bacterium powder, until bacterium powder dissolves completely, gained mixing solutions is that microorganism is fixed the sand dust-inhibitor again.
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| CN104926167A (en) * | 2015-05-21 | 2015-09-23 | 天津城建大学 | Method for consolidating waste incineration fly ash heavy metal through microorganism cement mineralization |
| CN105903738A (en) * | 2016-04-14 | 2016-08-31 | 河海大学 | Dredged mud stock yard in-situ environmental protection and dust prevention method based on microorganism solidification |
| CN106753248A (en) * | 2016-11-28 | 2017-05-31 | 东南大学 | A kind of multi-functional compounded Fugitive dust inhibiting agent prepared based on organized enzyme |
| CN107021658A (en) * | 2016-01-29 | 2017-08-08 | Daw集团 | The powder mixture of dust reduction |
| CN107033847A (en) * | 2017-04-25 | 2017-08-11 | 东南大学 | A kind of microorganism dust suppressant and its application |
| CN107057643A (en) * | 2017-03-20 | 2017-08-18 | 东南大学 | A kind of Fugitive dust inhibiting agent and application method based on Bacillus pasteurii culture |
| CN108004161A (en) * | 2017-11-30 | 2018-05-08 | 河海大学 | A kind of method and its microorganism reinforcing liquid that liquid prevention bump at bridgehead is reinforced using microorganism |
| CN108147631A (en) * | 2017-12-23 | 2018-06-12 | 郭舒洋 | A kind of compound sludge curing agent |
| CN108300348A (en) * | 2018-02-10 | 2018-07-20 | 张芸 | A kind of preparation method of Breathable medical adhesive tape |
| CN108360537A (en) * | 2018-01-31 | 2018-08-03 | 河海大学 | A kind of microorganism consolidates the bank protection anchor structure used in sand engineering and its application method |
| CN108842747A (en) * | 2018-06-25 | 2018-11-20 | 重庆大学 | A kind of construction method of the anti-dust biological overlay film of arid region |
| CN109540614A (en) * | 2018-10-26 | 2019-03-29 | 中国地质大学（武汉） | A kind of method and device preparing drift-sand mechanical test test specimen based on microorganism |
| CN109706094A (en) * | 2018-12-29 | 2019-05-03 | 中国水利水电科学研究院 | A kind of dust suppressant and preparation method thereof and application method |
| CN110305629A (en) * | 2019-07-02 | 2019-10-08 | 山东科技大学 | A kind of the coal mine compound dust suppressant of surfactant-microorganism and its application method |
| CN110820454A (en) * | 2019-10-24 | 2020-02-21 | 同济大学 | Water-permeable soil-based curing liquid and application thereof in preparation of water-permeable soil-based |
| CN111607361A (en) * | 2020-06-30 | 2020-09-01 | 河南大学 | Enzyme-based composite environment-friendly dust suppressant and preparation method and use method thereof |
| CN112205273A (en) * | 2020-09-25 | 2021-01-12 | 江苏澳洋生态园林股份有限公司 | Spray-seeding base material for high and steep slope of bare leaking limestone in laterite area and preparation method thereof |
| CN112409989A (en) * | 2020-11-30 | 2021-02-26 | 中冶南方都市环保工程技术股份有限公司 | Spherical lysine bacillus based tailing surface layer consolidation material and application |
| CN113355052A (en) * | 2021-05-26 | 2021-09-07 | 山东科技大学 | Microbial coal dust solidifying agent and preparation method and application thereof |
| CN115029107A (en) * | 2022-06-24 | 2022-09-09 | 太原理工大学 | Microbial dust suppressant based on coal storage and transportation and use method thereof |
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| CN104926167A (en) * | 2015-05-21 | 2015-09-23 | 天津城建大学 | Method for consolidating waste incineration fly ash heavy metal through microorganism cement mineralization |
| CN107021658A (en) * | 2016-01-29 | 2017-08-08 | Daw集团 | The powder mixture of dust reduction |
| CN105903738A (en) * | 2016-04-14 | 2016-08-31 | 河海大学 | Dredged mud stock yard in-situ environmental protection and dust prevention method based on microorganism solidification |
| CN106753248A (en) * | 2016-11-28 | 2017-05-31 | 东南大学 | A kind of multi-functional compounded Fugitive dust inhibiting agent prepared based on organized enzyme |
| CN107057643A (en) * | 2017-03-20 | 2017-08-18 | 东南大学 | A kind of Fugitive dust inhibiting agent and application method based on Bacillus pasteurii culture |
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| CN115029107B (en) * | 2022-06-24 | 2023-06-16 | 太原理工大学 | Microbial dust suppressant based on coal storage and transportation and application method thereof |
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Application publication date: 20140528 |