CN109134146A - A kind of soil-repairing agent containing loading nano-titania - Google Patents
A kind of soil-repairing agent containing loading nano-titania Download PDFInfo
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- CN109134146A CN109134146A CN201811058047.8A CN201811058047A CN109134146A CN 109134146 A CN109134146 A CN 109134146A CN 201811058047 A CN201811058047 A CN 201811058047A CN 109134146 A CN109134146 A CN 109134146A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
- C05B1/02—Superphosphates
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of soil-repairing agents containing loading nano-titania, can be used for by the reparation of heavy metal, organic pollutant contaminated soil.The soil-repairing agent includes loading nano-titania and straw powder, and wherein loading nano-titania is that nanometer anatase titania, the modified nanometer anatase titania of tin dope are carried on gas-phase silica and flyash and are prepared.The soil-repairing agent can not only effectively go back the heavy metal ion in native soil, reduce content of beary metal in long-term cropping, moreover it is possible to which the organic pollutant effectively in degradation soil significantly improves the pollution level of contaminated soil, improves the performance of soil tilth.It is also an option that the addition inorganic fertilizer and/or organic fertilizer of property, increase the nutrition fertility of soil in soil-repairing agent provided by the invention, promotes the growth of crop, realize the effect for improving Crop yield and quality.
Description
Technical field
The invention belongs to technical field of soil remediation, and in particular to a kind of soil containing loading nano-titania is repaired
Multiple agent, can be used for repairing by heavy metal and organic pollutant contaminated soil.
Background technique
With increasingly sharpening for mankind's activity, soil for the survival of mankind is also gradually destroyed, and soil pollution is more next
It is more serious, and then cause the yield and quality of crops sharply to decline, finally jeopardize human health and jeopardize the life of the mankind at last
It deposits and develops.At present in the pollution of country's soil, heavy metal (mainly including Hg, Pb, As, Cd, Cr etc.) pollution and organic contamination
The pollution of object (mainly including pesticide residue, fertilizer residue, phenols, petroleum pollution etc.) is more universal, the reparation of such soil
Problems demand solves.
In the prior art, peripheral doses are generallyd use for the reparation of heavy metal, organic pollutant contaminated soil, chemistry is repaired
Multiple, photocatalytic degradation reparation method.
Peripheral doses mostly use soil washing, and the heavy metal in soil is dissolved into soil rinsing liquid using leacheate
In, then a kind of soil remediation method that the heavy metal ion in rinsing liquid is cemented out.Zhao Na etc. research shows that EDTA and
Two kinds of chelating agents of EDDS respectively reach 82% and 46% to the removal rate of cadmium.But greatest problem existing for physical restoration is
Processing cost is high, and there is the risk polluted again.
Chemical remediation refers to change that quilt is added in the organic matter of heavy metal-polluted soil property and other allogenic materials
The soil of heavy metal pollution.Such as: use CaCO3Or Ca (OH)2, adjust the acid-base property of soil, promote cadmium in soil, copper,
The formation such as mercury, zinc precipitating.Sulphur-containing substance is added, the cadmium in soil, mercury can be made to generate sulfide precipitation, and then reduce heavy metal
Pollution to soil.Since the migration of each metal ion species is different, different metal ions are needed to consolidate using different
Earnest matter, rehabilitation cost are higher.
Many studies have shown that TiO of existing Photocatalyst2There is certain degradation effect to organic pollutant,
Also there is certain reduction adsorption effect to the heavy metal in soil, but uses single TiO2, efficiency is poor.Nanoscale TiO2It mentions
High TiO2Specific surface area so that its be catalyzed reducing heavy metal ion activity and degradable organic pollutant activity have one
Fixed raising, but since particle is smaller, it is easy to be lost, utilization rate is lower, causes final catalytic effect still poor.
Summary of the invention
The present invention is directed to by heavy metal and/or organic pollutant contaminated soil, is provided one kind and is contained loaded nano
The soil-repairing agent of titanium dioxide, the soil-repairing agent can not only effectively go back the heavy metal ion in native soil, moreover it is possible to effectively
Organic pollutant in degradation soil, significantly improves the pollution level of contaminated soil, improves the performance of soil tilth.
In order to achieve the object of the present invention, following technical scheme is inventor provided.
A kind of soil-repairing agent containing loading nano-titania, in terms of mass fraction, including loaded nano two
4-5 parts of titanium oxide, 2-4 parts of straw powder, the loading nano-titania are modified by nanometer anatase titania, tin dope
Nanometer anatase titania, gas-phase silica, flyash composition.
In the above-mentioned soil-repairing agent containing loading nano-titania, the loading nano-titania, with matter
Number meter is measured, by 5-6 parts of nanometer anatase titania, tin dope modified nanometer anatase titania 3-4 parts, gas phase hard charcoal
8-9 parts black, 2-3 parts of flyash compositions.
When preparing loading nano-titania of the present invention, be by the nanometer anatase titania of composition amounts,
Tin dope is modified nanometer anatase titania, gas-phase silica, flyash are placed in high-speed mixer, with revolving speed 2000rpm,
High-speed stirred is uniformly mixed and obtains.
The modified nanometer anatase titania of tin dope of the present invention the preparation method comprises the following steps:
Under normal temperature condition, a certain amount of butyl titanate is added in dehydrated alcohol first, SnCl is then added4, with Sn
Meter, SnCl4Additional amount be Butyl Phthalate (with TiO2Meter) quality 6%, after mixing evenly, then distilled water is added into solution,
It is stirring while adding, until solution presentation white opacity shape, the nitric acid of 0.015mol/L is then added, it is stirring while adding, until
Solution is in pale yellow transparent sol form, is then warming up to 80 DEG C again, and constant temperature is stirred to react 50min, the dry 3h at 80 DEG C, then
400 DEG C of calcining 2h in Muffle furnace are put into, the modified nanometer anatase titania of tin dope is obtained.
Nanometer anatase titania of the present invention, TiO2Mass percentage >=98%, disappears at average grain diameter≤50nm
Color power (Reynolds number) >=1300, anatase titanium dioxide TiO2Mass percentage >=99%, specific surface area BET >=45m2·g-1, pH value be
7.5~8.5.
Gas-phase silica of the present invention, SiO2Mass percentage >=99%, average grain diameter≤20nm, specific surface area
BET≥220m2·g-1, bulk density≤0.20gcm-3, pH value be 6.5~7.0.
The flyash that the present invention uses is the fine ash that the flue gas catching in thermal power plant after coal combustion is got off, average grain diameter
≤0.5μm。
Soil-repairing agent of the present invention containing loading nano-titania, can also include inorganic fertilizer and/
Or organic fertilizer.
The soil-repairing agent containing loading nano-titania, including 4-5 parts of loading nano-titania,
Straw powder 2-4,5-6 parts of inorganic fertilizer, 6-8 parts of organic fertilizer.
The straw powder is by corn stalk powder, wheat stalk powder, cotton stalk powder, sunflower straw powder, peanut straw powder
Composition.
The straw powder, is calculated in mass percent, by corn stalk powder 25-35%, wheat stalk powder 15-20%, cotton
Straw powder 10-20%, sunflower straw powder 10-20%, peanut straw powder 10-20% composition.
Straw powder average diameter≤the 2.0mm, average length≤5.0mm, water content≤10%.
The straw powder be by the corn stalk powder of composition amounts, wheat stalk powder, cotton stalk powder, sunflower straw powder,
Peanut straw powder is placed in high-speed mixer, and with revolving speed 1500rpm, high-speed stirred is uniformly mixed and obtains.
Soil-repairing agent of the present invention containing loading nano-titania, the inorganic fertilizer is by di(2-ethylhexyl)phosphate
Ammonium, potassium dihydrogen phosphate, ammonium chloride, ammoniated superphosphate, magnesium nitrate, potassium humate composition.
The inorganic fertilizer, is calculated in mass percent, by Diammonium phosphate (DAP) 20-30%, potassium dihydrogen phosphate 15-20%, chlorination
Ammonium 10-20%, ammoniated superphosphate 10-15%, magnesium nitrate 10-15%, potassium humate 10-15% composition.
Inorganic fertilizer of the present invention is prepared, first by the Diammonium phosphate (DAP) of composition amounts, potassium dihydrogen phosphate, ammonium chloride, ammonification
Calcium superphosphate, magnesium nitrate, potassium humate are crushed in pulverizer, then in high-speed mixer, with revolving speed 1200rpm,
High-speed stirred be uniformly mixed to get.
The organic fertilizer, is calculated in mass percent, by chicken manure 25-30%, pig manure 30-35%, cow dung 20-30%, corruption
Grow sour 10-15% composition, wherein chicken manure, pig manure, cow dung water content difference≤10%.Chicken manure, pig manure, cow dung are both from feeding
Grow the product after field is dried.
Organic fertilizer of the present invention is prepared, the chicken manure of composition amounts, pig manure, cow dung are first subjected to powder in pulverizer
It is broken, then in high-speed mixer, with revolving speed 1800rpm, high-speed stirred be uniformly mixed to get.
The soil-repairing agent of the present invention containing loading nano-titania is prepared, is by the negative of above-mentioned composition amounts
Load type nano-titanium dioxide and straw powder can also add inorganic fertilizer and/or organic fertilizer, be placed in high-speed mixer,
With revolving speed 2400rpm, high-speed stirred be uniformly mixed to get.
Loading nano-titania of the present invention, which refers to for nano-titanium dioxide to be fixed to, has porous adsorptivity
Carrier on, carrier can increase the effective ratio area to react, so that the light for further increasing nano-titanium dioxide is urged
Change efficiency.
Beneficial effects of the present invention are specific as follows:
(1) nano-titanium dioxide can absorb the radiation energy of ultraviolet light of the sunlight medium wavelength lower than 387nm, in valence band
Electronics transitted to conduction band by excitation, form high activity electronics on conduction band, while generating positively charged hole in valence band,
Electron-hole can be adsorbed on the dissolved oxygen on nano-titanium dioxide surface, that a series of chemical reaction occurs for hydrone is final
Hydroxyl radical free radical and superoxide ion are generated, with this oxygenolysis organic pollutant.Nano-titanium dioxide can also be in soil
Heavy metal ion is restored, and then reduces the content of beary metal in crop.In addition, under field conditions (factors), direct light drop
Solution effect is only limitted to soil surface, and the drop of organic pollutant at 4~10cm of soil surface or less can be improved in nano-titanium dioxide
Solve efficiency.In addition to this, nano-titanium dioxide can also assist organic fertilizer in microorganism accelerated degradation soil and other
Organic matter promotes absorption of the crop to soil with organic matter nutrient.
The chemical stability of nanometer anatase titania is preferable, nontoxic to the human body, no pollution to the environment.
In the modified nanometer anatase titania of tin dope, due to the doping of tin ion, so that the light of nano-titanium dioxide
Response wave length scope generates obvious red shift, to extend the range of the photoresponse wavelength of nanometer anatase titania, effectively
Improve its photocatalysis performance.
If nanometer anatase titania is used alone, since its photoresponse wave-length coverage is mainly ultraviolet light, to too
The utilization rate of sunlight is lower, and the present invention is by being modified nanometer anatase titania for nanometer anatase titania and tin dope
Two kinds of substances are used cooperatively, and are effectively extended nanometer anatase titania to the wavelength response range of sunlight, are improved it
To the utilization efficiency of sunlight, mixed material exhibits is finally made to go out higher photocatalysis performance.
(2) carrier for the fixation nano-titanium dioxide that the present invention selects is gas-phase silica and flyash.Gas-phase silica
Have the characteristics that it is loose porous, it is easy dispersion and it is prevented from caking.Flyash mean porosities are greater than 80%, it may have loose porous
Feature, while flyash also has certain passivation effect to heavy metal pollution of soil, moreover, also containing to soil in ingredient
The beneficial microelement of earth, is conducive to the growth of crop.
The present invention is used using gas-phase silica and flyash as the load agent of nano-titanium dioxide, loose can not only be received
Rice titanium dioxide improves the catalytic efficiency of nano-titanium dioxide, and degradation Soil Microorganism is difficult to the organic pollutant degraded, also
Certain repair can be played to the hardened of soil, water conservation, microelement etc..
In addition, the flyash that the present invention uses is the fine ash that the flue gas catching in thermal power plant after coal combustion is got off, belong to
In waste utilization, energy conservation and environmental protection.
(3) straw powder selected by the present invention is corn stalk powder, wheat stalk powder, cotton stalk powder, sunflower straw
The mixture of powder and peanut straw powder.Due to containing a large amount of cellulose in straw powder, soil texture can be improved, soil is dredged
Pine, water conservation, porosity increase, are not easy to harden, promote the development of crop root.Also have in different types of straw powder different
The content of organic matter and corps nutrient microelement can cooperate with the vigor for promoting Soil Microorganism, increase the soil organism.
In addition, the use of straw powder also belongs to refuse reclamation, reduce environmental pollution.
(4) soil-repairing agent of the present invention can selective addition inorganic fertilizer according to actual needs.It is selected
Inorganic fertilizer be Diammonium phosphate (DAP), potassium dihydrogen phosphate, ammonium chloride, ammoniated superphosphate, magnesium nitrate, potassium humate mixture,
The combination of these inorganic fertilizer has sufficiently ensured the nutrients such as N P and K magnesium calcium required for plant growth, and ingredient is comprehensive, and proportion is closed
Reason, fertilizer efficiency is fast, utilizes convenient for being absorbed by crops, increase yield significantly.
(5) soil-repairing agent of the present invention can also selective addition organic fertilizer according to actual needs.It is used
Organic fertilizer is the mixture of chicken manure, pig manure, cow dung, humic acid, through microbial action, can slowly release a variety of nutrition members
Element, continuously by nutrient supply crop, the addition of humic acid not only increases the nutrient of organic fertilizer, additionally it is possible to improve
The activity of enzyme in plant, reinforces its photosynthesis, to increase the quality of fruit, moreover, humic acid also has complexing
The effect of minor metallic element is conducive to nutrient and transmits to crop, can be avoided the loss of microelement in the soil, full
Foot demands of the crops to minor metallic element.Chicken manure, pig manure, cow dung in organic fertilizer both from farm, and
Waste utilization product, reduces environmental pollution.
Soil-repairing agent provided by the present invention can be used for repairing by heavy metal, organic pollutant contaminated soil.With biography
The soil restoring technology of system is compared, and soil-repairing agent provided by the invention has huge specific surface area, superpower absorption chelating
Ability, efficient sun light utilization efficiency and high catalytic activity, show high remediation efficiency in soil remediation, can not only
Degrading microorganism is difficult to the organic pollutant degraded, and reduces the content of heavy metal in soil, moreover it is possible to be effectively improved the plate of soil
Knot situation.It is also an option that the addition inorganic fertilizer and/or organic fertilizer of property, increase soil in soil-repairing agent provided by the invention
The nutrition fertility of earth promotes the growth of crop, realizes the effect for improving Crop yield and quality.Prepare soil of the present invention
The waste material that the plurality of raw materials of renovation agent generates in industrial and agricultural production, waste utilization, energy conservation and environmental protection.
Specific embodiment
The content in order to further illustrate the present invention, inventor provides following technical scheme.
Embodiment 1
Weigh nanometer anatase titania 5kg, tin dope modified nanometer anatase titania 3kg, gas-phase silica
8kg, flyash 2kg, are placed in high-speed mixer, and with revolving speed 2000rpm, high-speed stirred is uniformly mixed, and loaded nano is made
Titanium dioxide mixed powder.
Weigh corn stalk powder 2.5kg (25%), wheat stalk powder 1.5kg (15%), cotton stalk powder 2.0kg
(20%), sunflower straw powder 2.0kg (20%), peanut straw powder 2.0kg (20%), the average diameter of every kind of straw powder≤
2.0mm, average length≤5.0mm, water content≤10% are placed in high-speed mixer, and with revolving speed 1500rpm, high-speed stirred is mixed
It closes uniformly, mixed straw powder is made.
Loading nano-titania mixed powder 4kg, mixed straw powder 2kg are weighed, is placed in high-speed mixer, with revolving speed
2400rpm, high-speed stirred are uniformly mixed, and soil-repairing agent is made.
Embodiment 2
Weigh nanometer anatase titania 6kg, tin dope modified nanometer anatase titania 4kg, gas-phase silica
9kg, flyash 3kg, are placed in high-speed mixer, and with revolving speed 2000rpm, high-speed stirred is uniformly mixed, and loaded nano is made
Titanium dioxide mixed powder.
Weigh corn stalk powder 3.0kg (30%) wheat stalk powder 1.5kg (15%), cotton stalk powder 1.5kg
(15%), sunflower straw powder 2.0kg (20%), peanut straw powder 2.0kg (20%), the average diameter of every kind of straw powder≤
2.0mm, average length≤5.0mm, water content≤10% are placed in high-speed mixer, and with revolving speed 1500rpm, high-speed stirred is mixed
It closes uniformly, mixed straw powder is made.
Loading nano-titania mixed powder 5kg, mixed straw powder 4kg are weighed, is placed in high-speed mixer, with revolving speed
2400rpm, high-speed stirred are uniformly mixed, and soil-repairing agent is made.
Embodiment 3
Weigh nanometer anatase titania 6kg, tin dope modified nanometer anatase titania 4kg, gas-phase silica
8kg, flyash 2kg, are placed in high-speed mixer, and with revolving speed 2000rpm, high-speed stirred is uniformly mixed, and loaded nano is made
Titanium dioxide mixed powder.
Weigh corn stalk powder 3.5kg (35%), wheat stalk powder 2.0kg (20%), cotton stalk powder 1.0kg
(10%), sunflower straw powder 1.5kg (15%), peanut straw powder 2.0kg (20%), the average diameter of every kind of straw powder≤
2.0mm, average length≤5.0mm, water content≤10% are placed in high-speed mixer, and with revolving speed 1500rpm, high-speed stirred is mixed
It closes uniformly, mixed straw powder is made.
Loading nano-titania mixed powder 4.5kg, mixed straw powder 3kg are weighed, is placed in high-speed mixer, to turn
Fast 2400rpm, high-speed stirred are uniformly mixed, and soil-repairing agent is made.
Embodiment 4
Weigh nanometer anatase titania 5kg, tin dope modified nanometer anatase titania 3kg, gas-phase silica
9kg, flyash 3kg, are placed in high-speed mixer, and with revolving speed 2000rpm, high-speed stirred is uniformly mixed, and loaded nano is made
Titanium dioxide mixed powder.
Weigh corn stalk powder 2.8kg (28%), wheat stalk powder 1.8kg (18%), cotton stalk powder 2.0kg
(20%), sunflower straw powder 1.9kg (19%), peanut straw powder 1.5kg (15%), the average diameter of every kind of straw powder≤
2.0mm, average length≤5.0mm, water content≤10% are placed in high-speed mixer, and with revolving speed 1500rpm, high-speed stirred is mixed
It closes uniformly, mixed straw powder is made.
Weigh Diammonium phosphate (DAP) 2.0kg (20%), potassium dihydrogen phosphate 2.0kg (20%), ammonium chloride 2.0kg (20%), ammonification
Calcium superphosphate 1.5kg (15%), magnesium nitrate 1.5kg (15%), potassium humate 1.0kg (10%), are first respectively placed in pulverizer
It is crushed, then in high-speed mixer, with revolving speed 1200rpm, high-speed stirred is uniformly mixed, and obtains the mixed of inorganic fertilizer
Powder.
Weigh chicken manure 2.5kg (25%), pig manure 3.0kg (30%), cow dung 3.0kg (30%), humic acid 1.5kg
(15%), wherein chicken manure, pig manure, cow dung water content≤10%, chicken manure, pig manure, cow dung are first subjected to powder in pulverizer
It is broken, then in high-speed mixer, with revolving speed 1800rpm, the uniformly mixed mixed powder to get organic fertilizer of high-speed stirred.
Weigh the mixed powder 5kg, organic of loading nano-titania mixed powder 4kg, mixed straw powder 2kg, inorganic fertilizer
The mixed powder 6kg of fertilizer, is placed in high-speed mixer, and with revolving speed 2400rpm, high-speed stirred is uniformly mixed, and soil-repairing agent is made.
Embodiment 5
Weigh nanometer anatase titania 5kg, tin dope modified nanometer anatase titania 4kg, gas-phase silica
8kg, flyash 3kg, are placed in high-speed mixer, and with revolving speed 2000rpm, high-speed stirred is uniformly mixed, and loaded nano is made
Titanium dioxide mixed powder.
Weigh corn stalk powder 3.2kg (32%), wheat stalk powder 2.0kg (20%), cotton stalk powder 2.0kg
(20%), sunflower straw powder 1.0kg (10%), peanut straw powder 1.8kg (18%), the average diameter of every kind of straw powder≤
2.0mm, average length≤5.0mm, water content≤10% are placed in high-speed mixer, and with revolving speed 1500rpm, high-speed stirred is mixed
It closes uniformly, mixed straw powder is made.
Weigh Diammonium phosphate (DAP) 3.0kg (30%), potassium dihydrogen phosphate 2.0kg (20%), ammonium chloride 1.0kg (10%), ammonification
Calcium superphosphate 1.5kg (15%), magnesium nitrate 1.0kg (10%), potassium humate 1.5kg (15%), are first respectively placed in pulverizer
It is crushed, then in high-speed mixer, with revolving speed 1200rpm, high-speed stirred is uniformly mixed, and obtains the mixed of inorganic fertilizer
Powder.
Weigh chicken manure 3.0kg (30%), pig manure 3.5kg (35%), cow dung 2.0kg (20%), humic acid 1.5kg
(15%), wherein chicken manure, pig manure, cow dung water content≤10%, chicken manure, pig manure, cow dung are first subjected to powder in pulverizer
It is broken, then in high-speed mixer, with revolving speed 1800rpm, the uniformly mixed mixed powder to get organic fertilizer of high-speed stirred.
Weigh the mixed powder 6kg, organic of loading nano-titania mixed powder 5kg, mixed straw powder 4kg, inorganic fertilizer
The mixed powder 8kg of fertilizer, is placed in high-speed mixer, and with revolving speed 2400rpm, high-speed stirred is uniformly mixed, and soil-repairing agent is made.
Embodiment 6
It is white to weigh the modified nanometer anatase titania 3.5kg of nanometer anatase titania 5.5kg, tin dope, gas phase
Carbon black 8.5kg, flyash 2.5kg, are placed in high-speed mixer, and with revolving speed 2000rpm, high-speed stirred is uniformly mixed, and are made negative
Load type nano-titanium dioxide mixed powder.
Weigh corn stalk powder 3.5kg (35%), wheat stalk powder 2.0kg (20%), cotton stalk powder 1.8kg
(18%), sunflower straw powder 1.7kg (17%), peanut straw powder 1.0kg (10%), the average diameter of every kind of straw powder≤
2.0mm, average length≤5.0mm, water content≤10% are placed in high-speed mixer, and with revolving speed 1500rpm, high-speed stirred is mixed
It closes uniformly, mixed straw powder is made.
Weigh Diammonium phosphate (DAP) 2.5kg (25%), potassium dihydrogen phosphate 1.8kg (18%), ammonium chloride 2.0kg (20%), ammonification
Calcium superphosphate 1.2kg (12%), magnesium nitrate 1.3kg (13%), potassium humate 1.2kg (12%), are first respectively placed in pulverizer
It is crushed, then in high-speed mixer, with revolving speed 1200rpm, high-speed stirred is uniformly mixed, and obtains the mixed of inorganic fertilizer
Powder.
Weigh chicken manure 2.7kg (27%), pig manure 3.3kg (33%), cow dung 2.8kg (28%), humic acid 1.2kg
(12%), wherein chicken manure, pig manure, cow dung water content≤10%, chicken manure, pig manure, cow dung are first subjected to powder in pulverizer
It is broken, then in high-speed mixer, with revolving speed 1800rpm, the uniformly mixed mixed powder to get organic fertilizer of high-speed stirred.
Weigh loading nano-titania mixed powder 4.5kg, mixed straw powder 3kg, inorganic fertilizer mixed powder 5.5kg,
The mixed powder 7kg of organic fertilizer, is placed in high-speed mixer, and with revolving speed 2400rpm, high-speed stirred is uniformly mixed, and obtained soil is repaired
Multiple agent.
Embodiment 7
In order to illustrate the using effect of soil-repairing agent provided by the present invention, inventor has carried out practical application examination
It tests, particular content is as follows:
Application test selects the contaminated soil of Hebei Shijiazhuang District, is repaired using the soil that the embodiment of the present invention is prepared
Multiple agent carries out the reparation of soil, and renovation agent is added in when plowed soils, samples after being added 3 months, repairs the separately sampled progress in front and back
The detection of soil function index, specific testing result are as shown in table 1.
The maize planting on selected plot, the plantation of corn select summer and autumn, to divide after mature respectively before and after soil remediation
The detection of corn yield and quality Qu Yang not be carried out, specific testing result is as shown in table 2.
Corn planting and soil sample require reference standard NY/T 2271-2016 to carry out, and state heavy metal is extracted in soil is
The form for being be easily moved and being directly absorbed and utilized in the soil by crop is the finger for evaluating heavy metal in soil pollution level
One of mark.Organic pollutant is mainly the organic pollutants such as common pesticide residue, fertilizer residue, phenols, petroleum pollution
Summation.The performance indicator tested is average value, and measuring method is carried out with reference to relevant national standard.
The sample of 1-6 is successively taken from the soil that joined renovation agent prepared by embodiment 1-6 respectively after reparation.
Table 1
As can be seen from Table 1, the soil after soil-repairing agent of the present invention reparation, bulk density substantially reduce, explanation
The porosity of soil increases；The pH value variation of soil is little, slightly meta-alkalescence；The degradation rate of organic pollutant reached 80% with
On；Heavy Metals in Contaminated Soils Hg, Pb, Cd are seriously more than II grade of the Soil-environmental standard value of GB15618-1995 defined
Standard, content is greatly reduced after reparation, and repairing effect is obvious.In addition, in renovation agent of the present invention organic fertilizer addition, it is also obvious
The content of the organic matter in contaminated soil is improved, inorganic fertilizer also improves the content of Available N-P-K etc. in soil, favorably
In crop growth.
Table 2
As can be seen from Table 2, the corn directly planted by contaminated soil, according to grain health standard GB/T 2715-
2005, heavy metal Hg, Pb, Cd content has severely exceeded in corn, and the content that As is limited also close to standard, corn per mu yield compares
Low, the quality index such as protein, fat, starch and lysine are unqualified, will seriously affect human health after edible.
The corn of grown on soil after renovation agent of the present invention reparation, the content of beary metal in corn is substantially reduced, much low
The content's index standard of heavy metal, per mu yield are also clearly not available in the corn of standard GB/T 2715-2005 defined
It improves, it has been more than index that the quality index such as protein, fat, starch and lysine, which are also obviously improved, in corn
Standard, corn quality improve.The renovation agent for adding inorganic fertilizer and organic fertilizer is brighter compared to the fertility effect that do not add
Aobvious, the corn yield and quality of the grown on soil after its reparation are also more preferable.
In conclusion the soil-repairing agent provided by the invention containing loading nano-titania, can not only effectively drop
The organic pollutant in contaminated soil is solved, the content for the heavy metal being absorbed by crops can be also reduced, the hole of soil can also be increased
The addition of gap rate, inorganic fertilizer and organic fertilizer also effectively supplements the fertility of soil, makes the yield and quality of crop while obtaining
To raising.
Claims (10)
1. a kind of soil-repairing agent containing loading nano-titania, which is characterized in that in terms of mass fraction, including load
4-5 parts of type nano-titanium dioxide, 2-4 parts of straw powder, the loading nano-titania is by nanometer anatase titania, tin
Doping vario-property nanometer anatase titania, gas-phase silica, flyash composition.
2. the soil-repairing agent according to claim 1 containing loading nano-titania, which is characterized in that described negative
Load type nano-titanium dioxide, in terms of mass fraction, by 5-6 parts of nanometer anatase titania, the modified dichloride in anatase type of tin dope
3-4 parts of titanium dioxide, 8-9 parts of gas-phase silica, 2-3 parts of flyash compositions.
3. the soil-repairing agent according to claim 1 containing loading nano-titania, which is characterized in that further include
Any one in inorganic fertilizer, organic fertilizer or two kinds.
4. the soil-repairing agent according to claim 1 containing loading nano-titania, which is characterized in that including negative
4-5 parts of load type nano-titanium dioxide, straw powder 2-4,5-6 parts of inorganic fertilizer, 6-8 parts of organic fertilizer.
5. the soil-repairing agent according to claim 1 containing loading nano-titania, which is characterized in that the straw
Stalk powder is made of corn stalk powder, wheat stalk powder, cotton stalk powder, sunflower straw powder, peanut straw powder.
6. the soil-repairing agent according to claim 1 containing loading nano-titania, which is characterized in that the straw
Stalk powder, is calculated in mass percent, by corn stalk powder 25-35%, wheat stalk powder 15-20%, cotton stalk powder 10-20%,
Sunflower straw powder 10-20%, peanut straw powder 10-20% composition.
7. the soil-repairing agent according to claim 1 containing loading nano-titania, which is characterized in that the straw
Stalk powder average diameter≤2.0mm, average length≤5.0mm, water content≤10%.
8. the soil-repairing agent according to claim 3 or 4 containing loading nano-titania, which is characterized in that institute
Inorganic fertilizer is stated to be made of Diammonium phosphate (DAP), potassium dihydrogen phosphate, ammonium chloride, ammoniated superphosphate, magnesium nitrate, potassium humate.
9. the soil-repairing agent according to claim 3 or 4 containing loading nano-titania, which is characterized in that institute
State inorganic fertilizer, be calculated in mass percent, by Diammonium phosphate (DAP) 20-30%, potassium dihydrogen phosphate 15-20%, ammonium chloride 10-20%,
Ammoniated superphosphate 10-15%, magnesium nitrate 10-15%, potassium humate 10-15% composition.
10. the soil-repairing agent according to claim 3 or 4 containing loading nano-titania, which is characterized in that institute
Organic fertilizer is stated, is calculated in mass percent, by chicken manure 25-30%, pig manure 30-35%, cow dung 20-30%, humic acid 10-15%
Composition, wherein chicken manure, pig manure, cow dung water content difference≤10%.
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Application publication date: 20190104 |