CN107384426A - A kind of renovation agent of cation heavy-metal contaminated soil and preparation method thereof - Google Patents
A kind of renovation agent of cation heavy-metal contaminated soil and preparation method thereof Download PDFInfo
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- CN107384426A CN107384426A CN201710676090.XA CN201710676090A CN107384426A CN 107384426 A CN107384426 A CN 107384426A CN 201710676090 A CN201710676090 A CN 201710676090A CN 107384426 A CN107384426 A CN 107384426A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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Abstract
The invention discloses a kind of renovation agent of cation heavy-metal contaminated soil, it is made up of following raw material according to parts by weight:0.5 3 parts of 45 75 parts of sewage plant sludge, 18 26 parts of flyash, 30 50 parts of stalk, 6 12 parts of dregs of beans, 38 parts of clover, 4 10 parts of bitter leaves, 6 10 parts of pulverized limestone, 8 15 parts of animal wastes, 26 parts of humic acid and chitosan.The present invention also disclosed the preparation method and application method of the renovation agent.For the medicament of the present invention using simple, dosage is few, can be by chelating, precipitating, the compound action such as adsorbing, fast and effeciently reduce the content of heavy metal in soil pollutant, increase soil fertility, secondary pollution will not be caused, there is good Social benefit and economic benefit.
Description
Technical field
The present invention relates to soil remediation field, specifically a kind of renovation agent of cation heavy-metal contaminated soil.
Background technology
With the continuous development of global economy, heavy metal pollution of soil is mainly asked as what global environment quality faced
The t of Hg about 1.5 ten thousand are discharged in topic, the whole world every year on average, and Ni is 1,000,000 t, and Cu is 3,400,000 t, and Pb is 5,000,000 t, and Mn is 15,000,000 t.
China is accounted for the 1/5 of national total area under cultivation by the cultivated area of the heavy metal pollutions such as Cd, As, Pb, Cr, Hg.It is heavy metal-polluted
Dye thing belongs to a kind of priority pollutants, and the heavy metal pollution in environment is decided by the content of heavy metal in the environment with harm
The toxicity of distribution, chemical characteristic, environmental chemical behavio4, Transport And Transformation and heavy metal to biology.Mankind's activity (exploitation of mineral resources,
Metal smelt, sanitary wastewater discharge, use of chemical fertilizer and agricultural chemicals etc.) Biogeochemistry that greatly accelerates heavy metal follows
Ring, it is in ever-increasing trend to make the heavy metal in environment, increases harm of the heavy metal to human health.When in entrance environment
Heavy metal when exceeding its capacity in the environment, you can cause the generation of heavy metal pollution.Heavy metal contaminants are persistence
Pollutant, the harm to environment and human body are difficult to eliminate.Heavy metal ion is cation, has that chemical activity is strong, migration
Property it is big, toxicity is lasting the features such as, in the environment be difficult degraded, its accumulation in soil, migration not only cause composition of the soil,
Structure, changes of function, additionally it is possible to suppress crop root effect and photosynthesis, cause crop failure or even have no harvest, it is prior
It is that heavy metal is migrated into the human body by food chain, is accumulated gradually in human body, cause the chronic heavy metal poisoning of human body, cause kidney
Dirty, liver, lung, bone, reproductive organs, immune system, cardiovascular system injury, high risks are caused to health.
At present, heavy metal-polluted soil recovery technique is broadly divided into phytoremediation, microorganism remediation, physical chemistry reparation and agricultural
Engineering Remediation Techniques.But the reparation floristics of phytoremediation technology is limited, and its reparation speed is slower, accumulates a large amount of weights
The problems such as reprocessing of metal plant is also the principal element for limiting phytoremediation technology large-scale promotion;Microorganism remediation technology
It is general only preferable to the adsorption effect of an independent heavy metal species, and because microorganism organism is smaller, the heavy metal amount of reparation
It is less, therefore which also limits the application that large area field repair is carried out using microorganism;Electric repairing technique at present also in
The experimental study stage, and there is also a series of limiting factor in actual applications because of the physicochemical property difference of different soils;
Soil leaching technical operation is complicated, expensive;Agriculture project recovery technique needs to consume substantial amounts of manpower, financial resources, and to soil
Earth disturbance is big, therefore a kind of soil-repairing agent for various heavy has wide market prospects.
The content of the invention
It is an object of the invention to provide a kind of renovation agent of cation heavy-metal contaminated soil, to solve above-mentioned background skill
The problem of being proposed in art.
To achieve the above object, the present invention provides following technical scheme:
A kind of renovation agent of cation heavy-metal contaminated soil, is made up of following raw material according to parts by weight:Sewage plant sludge
45-75 parts, flyash 18-26 parts, stalk 30-50 parts, dregs of beans 6-12 parts, clover 3-8 parts, bitter leaves 4-10 parts, pulverized limestone 6-10
Part, animal wastes 8-15 parts, humic acid 2-6 parts and chitosan 0.5-3 parts.
As the further scheme of the present invention:The moisture content of sewage plant sludge is not higher than 2%.
As the further scheme of the present invention:Stalk uses soybean stalk, wheat stalk, maize straw, straw and sorghum
One or several kinds of mixtures in stalk, animal wastes use at least one in cow dung, sheep manure, pig manure, chicken manure and duck excrement
Kind.
The preparation method of the renovation agent of the cation heavy-metal contaminated soil, is comprised the following steps that:
Step 1, stalk is immersed in its weight 4-8% silicic acid, in the case where completely cutting off air conditionses, with heating per minute
10-25 degrees Celsius so that temperature is increased to 390-500 degrees Celsius and is kept for 6-8 hours, then keeps isolation air conditionses cooling
To room temperature, modification biological charcoal is obtained;
Step 2, clover and bitter leaves are crushed respectively, the distilled water for adding 8-14 times of its weight carries out high temperature distillation, takes
Go out and be cooled to room temperature, take supernatant, respectively obtain clover extract solution and bitter leaves extract solution;
Step 3, animal wastes, dregs of beans, clover extract solution are well mixed with sewage plant sludge, taken the photograph in temperature for 50-65
It is sealed by fermentation 6-10 days in the fermentation tank of family name's degree, obtains the first mixture;
Step 4, chitosan powder is broken to 150-210 mesh and adds bitter leaves extract solution, humic acid and appropriate thereto
Water, it is mixed evenly, obtains the second mixture;
Step 5, modification biological charcoal, the first mixture, the second mixture and pulverized limestone are sufficiently stirred mixing, and crushed
Cross more than 180 mesh and sieve, conditioner predecessor is made;
Step 6, after conditioner predecessor and flyash are well mixed, water spray is granulated, and finished product is can obtain after drying.
As the further scheme of the present invention:The temperature of step 2 high temperature distillation is 86-105 degrees Celsius, in step 5
Mixing speed is 30-60rpm, and the particle diameter of finished product is 1.3-2.5mm.
The application method of the renovation agent of the cation heavy-metal contaminated soil, is comprised the following steps that:Contaminated soil is dug
Going out, and soil breaking is sieved, gained diameter of soil pellet is 0.1-2cm, is evenly distributed on impervious barrier or hardened ground,
Renovation agent is added in the heavy-metal contaminated soil of crushing and screening and is stirred, adding proportion is the 3- of soil quality
5%, it is 12-18% to add water management soil moisture content, and after being sufficiently mixed, outdoor normal temperature conserves 5-8 days.
Compared with prior art, the beneficial effects of the invention are as follows:Raw material sources of the present invention are extensive, and preparation technology is simple, raw
It is low to produce cost, can be with large-scale industrial production;For the medicament of the present invention using simply, dosage is few, can be by chelating, sinking
The compound actions such as shallow lake, absorption, the content of heavy metal in soil pollutant is fast and effeciently reduced, increases soil fertility, Bu Huizao
Into secondary pollution, there is good Social benefit and economic benefit.
Embodiment
The technical scheme of this patent is described in more detail with reference to embodiment.
Embodiment 1
A kind of renovation agent of cation heavy-metal contaminated soil, is made up of following raw material according to parts by weight:Sewage plant sludge
45 parts, 18 parts of flyash, 30 parts of stalk, 6 parts of dregs of beans, 3 parts of clover, 4 parts of bitter leaves, 6 parts of pulverized limestone, 8 parts of animal wastes, humic acid
2 parts and 0.5 part of chitosan.The moisture content of sewage plant sludge is not higher than 2%.
The preparation method of the renovation agent of the cation heavy-metal contaminated soil, is comprised the following steps that:
Step 1, stalk is immersed in the silicic acid of its weight 6%, in the case where completely cutting off air conditionses, with heating 15 per minute
Degree Celsius so that temperature is increased to 420 degrees Celsius and kept for 6 hours, then keeps isolation air conditionses to be cooled to room temperature, obtains
Modification biological charcoal;
Step 2, clover and bitter leaves are crushed respectively, the distilled water for adding 10 times of its weight carries out high temperature distillation, high temperature
The temperature of distillation is 95 degrees Celsius, takes out and is cooled to room temperature, takes supernatant, respectively obtains clover extract solution and bitter leaves extraction
Liquid;
Step 3, animal wastes, dregs of beans, clover extract solution are well mixed with sewage plant sludge, are 55 Celsius in temperature
It is sealed by fermentation 8 days in the fermentation tank of degree, obtains the first mixture;
Step 4, chitosan powder is broken to 180 mesh and adds bitter leaves extract solution, humic acid and appropriate water thereto,
It is mixed evenly, obtains the second mixture;
Step 5, by modification biological charcoal, the first mixture, the second mixture and pulverized limestone under 45rpm rotating speed fully
Stir and evenly mix, and crushed and more than 180 mesh sieve, conditioner predecessor is made;
Step 6, after conditioner predecessor and flyash are well mixed, water spray is granulated, and finished product is can obtain after drying,
The particle diameter of finished product is 1.5mm.
The application method of the renovation agent of the cation heavy-metal contaminated soil, is comprised the following steps that:Contaminated soil is dug
Go out, and soil breaking is sieved, gained diameter of soil pellet is 0.6cm, is evenly distributed on impervious barrier or hardened ground, will
Renovation agent is added in the heavy-metal contaminated soil of crushing and screening and is stirred, and adding proportion is the 3% of soil quality, is added
Water management soil moisture content is 15%, and after being sufficiently mixed, outdoor normal temperature conserves 6 days.
Embodiment 2
A kind of renovation agent of cation heavy-metal contaminated soil, is made up of following raw material according to parts by weight:Sewage plant sludge
58 parts, 22 parts of flyash, 42 parts of stalk, 9 parts of dregs of beans, 6 parts of clover, 7 parts of bitter leaves, 8 parts of pulverized limestone, 12 parts of animal wastes, humic
2 parts of 4 parts of acid and chitosan.Stalk uses the mixing of pig manure and duck excrement using soybean stalk and the mixture of straw, animal wastes
Thing.
The preparation method of the renovation agent of the cation heavy-metal contaminated soil, is comprised the following steps that:
Step 1, stalk is immersed in the silicic acid of its weight 8%, in the case where completely cutting off air conditionses, with heating 20 per minute
Degree Celsius so that temperature is increased to 450 degrees Celsius and kept for 7 hours, then keeps isolation air conditionses to be cooled to room temperature, obtains
Modification biological charcoal;
Step 2, clover and bitter leaves are crushed respectively, the distilled water for adding 12 times of its weight carries out high temperature distillation, takes out
And room temperature is cooled to, takes supernatant, respectively obtains clover extract solution and bitter leaves extract solution;
Step 3, animal wastes, dregs of beans, clover extract solution are well mixed with sewage plant sludge, are 64 Celsius in temperature
It is sealed by fermentation 7 days in the fermentation tank of degree, obtains the first mixture;
Step 4, chitosan powder is broken to 200 mesh and adds bitter leaves extract solution, humic acid and appropriate water thereto,
It is mixed evenly, obtains the second mixture;
Step 5, modification biological charcoal, the first mixture, the second mixture and pulverized limestone are sufficiently stirred mixing, and crushed
Cross more than 180 mesh and sieve, conditioner predecessor is made;
Step 6, after conditioner predecessor and flyash are well mixed, water spray is granulated, and finished product is can obtain after drying.
The application method of the renovation agent of the cation heavy-metal contaminated soil, is comprised the following steps that:Contaminated soil is dug
Go out, and soil breaking is sieved, gained diameter of soil pellet is 0.8cm, is evenly distributed on impervious barrier or hardened ground, will
Renovation agent is added in the heavy-metal contaminated soil of crushing and screening and is stirred, and adding proportion is the 5% of soil quality, is added
Water management soil moisture content is 18%, and after being sufficiently mixed, outdoor normal temperature conserves 7 days
Embodiment 3
A kind of renovation agent of cation heavy-metal contaminated soil, is made up of following raw material according to parts by weight:Sewage plant sludge
72 parts, it is 26 parts of flyash, 48 parts of stalk, 12 parts of dregs of beans, 8 parts of clover, 10 parts of bitter leaves, 10 parts of pulverized limestone, 15 parts of animal wastes, rotten
Grow 3 parts of 6 parts of acid and chitosan.The moisture content of sewage plant sludge is not higher than 2%.Stalk is using soybean stalk, wheat stalk, corn
The mixture of stalk, straw and broomcorn straw, animal wastes use the mixture of cow dung, sheep manure, pig manure, chicken manure and duck excrement.
The preparation method of the renovation agent of the cation heavy-metal contaminated soil, is comprised the following steps that:
Step 1, stalk is immersed in the silicic acid of its weight 5%, in the case where completely cutting off air conditionses, with heating 18 per minute
Degree Celsius so that temperature is increased to 480 degrees Celsius and kept for 8 hours, then keeps isolation air conditionses to be cooled to room temperature, obtains
Modification biological charcoal;
Step 2, clover and bitter leaves are crushed respectively, the distilled water for adding 11 times of its weight carries out high temperature distillation, high temperature
The temperature of distillation is 100 degrees Celsius, takes out and is cooled to room temperature, take supernatant, respectively obtains clover extract solution and bitter leaves carries
Take liquid;
Step 3, animal wastes, dregs of beans, clover extract solution are well mixed with sewage plant sludge, are 56 Celsius in temperature
It is sealed by fermentation 7 days in the fermentation tank of degree, obtains the first mixture;
Step 4, chitosan powder is broken to 180 mesh and adds bitter leaves extract solution, humic acid and appropriate water thereto,
It is mixed evenly, obtains the second mixture;
Step 5, modification biological charcoal, the first mixture, the second mixture and pulverized limestone are fully stirred with 45rpm rotating speed
Mixing is mixed, and crushed and more than 180 mesh sieve, conditioner predecessor is made;
Step 6, after conditioner predecessor and flyash are well mixed, water spray is granulated, and finished product is can obtain after drying,
The particle diameter of finished product is 2.2mm.
The application method of the renovation agent of the cation heavy-metal contaminated soil, is comprised the following steps that:Contaminated soil is dug
Go out, and soil breaking is sieved, gained diameter of soil pellet is 1.6cm, is evenly distributed on impervious barrier or hardened ground, will
Renovation agent is added in the heavy-metal contaminated soil of crushing and screening and is stirred, and adding proportion is the 4% of soil quality, is added
Water management soil moisture content is 12%, and after being sufficiently mixed, outdoor normal temperature conserves 8 days.
Silicic acid is added in stalk by the present invention in charcoal preparation process, completely cuts off air calcination at a certain temperature,
So that silicic acid is entered in the structure hole of charcoal, and it is big with specific surface area, the features such as hole is more and polarity is strong, have stronger
Adsorptivity, ion exchangeable and dilatancy, have very strong absorption property to the various heavy metal pollutants in soil;It is rotten
Growing acid has larger internal surface area and more active group, such as phenolic hydroxyl group, alcoholic extract hydroxyl group, carboxyl and carbonyl, has stronger
Absorption, exchange, sequestering power, while have the function that to strengthen soil fertility, improved soil structure, humic acid and chitosan are mixed
Close, the adsorption efficiency and adsorption capacity of medicament can be improved;Pulverized limestone provides relatively stable slight alkali environment, increases soil surface
Variable charge soil, promote the absorption of medicament heavy metal ion, the medicament heavy metal stablizing effect is more in the basic conditions
It is good;Loose porous shape is presented in animal wastes, dregs of beans, clover extract solution and sewage plant sludge tunning, is heavy metal adsorption
A large amount of adsorption sites are provided, are advantageous to the absorption, complexing and precipitation of heavy metal in soil, the medicament, can using charcoal as carrier
, can be to Compound Heavy Metals under the conditions of acid or basic soil to give full play to the passivation effect of each active ingredient to various heavy
Contaminated soil carries out passivation while various heavy;The combined pollutions such as agricultural land soil cadmium, arsenic, lead can be carried out simultaneously blunt
Change, it is good with the purpose realized heavy metal passivation and secure agricultural production while carried out, using effect.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (6)
1. a kind of renovation agent of cation heavy-metal contaminated soil, it is characterised in that be made up of following raw material according to parts by weight:It is dirty
Waterworks sludge 45-75 parts, flyash 18-26 parts, stalk 30-50 parts, dregs of beans 6-12 parts, clover 3-8 parts, bitter leaves 4-10 parts, stone
Ashes 6-10 parts, animal wastes 8-15 parts, humic acid 2-6 parts and chitosan 0.5-3 parts.
2. the renovation agent of cation heavy-metal contaminated soil according to claim 1, it is characterised in that the sewage plant is dirty
The moisture content of mud is not higher than 2%.
3. the renovation agent of cation heavy-metal contaminated soil according to claim 1 or 2, it is characterised in that the stalk
Using one or several kinds of mixtures in soybean stalk, wheat stalk, maize straw, straw and broomcorn straw, animal excreta
Just using at least one of cow dung, sheep manure, pig manure, chicken manure and duck excrement.
4. a kind of preparation method of the renovation agent of cation heavy-metal contaminated soil as described in claim 1-3 is any, it is special
Sign is, comprises the following steps that:
Step 1, stalk is immersed in its weight 4-8% silicic acid, in the case where completely cutting off air conditionses, with heating 10-25 per minute
Degree Celsius so that temperature is increased to 390-500 degrees Celsius and is kept for 6-8 hours, then keeps isolation air conditionses to be cooled to room
Temperature, obtain modification biological charcoal;
Step 2, clover and bitter leaves are crushed respectively, the distilled water for adding 8-14 times of its weight carries out high temperature distillation, takes out simultaneously
And room temperature is cooled to, supernatant is taken, respectively obtains clover extract solution and bitter leaves extract solution;
Step 3, animal wastes, dregs of beans, clover extract solution are well mixed with sewage plant sludge, are 50-65 degrees Celsius in temperature
Fermentation tank in be sealed by fermentation 6-10 days, obtain the first mixture;
Step 4, chitosan powder is broken to 150-210 mesh and adds bitter leaves extract solution, humic acid and appropriate water thereto,
It is mixed evenly, obtains the second mixture;
Step 5, modification biological charcoal, the first mixture, the second mixture and pulverized limestone are sufficiently stirred mixing, and crushed 180
More than mesh sieve, conditioner predecessor is made;
Step 6, after conditioner predecessor and flyash are well mixed, water spray is granulated, and finished product is can obtain after drying.
5. the preparation method of the renovation agent of cation heavy-metal contaminated soil according to claim 4, it is characterised in that institute
The temperature for stating the distillation of step 2 high temperature is 86-105 degrees Celsius, and mixing speed is 30-60rpm in step 5, the particle diameter of finished product
For 1.3-2.5mm.
6. a kind of application method of the renovation agent of cation heavy-metal contaminated soil as described in claim 1-3 is any, it is special
Sign is, comprises the following steps that:Contaminated soil is dug out, and soil breaking is sieved, gained diameter of soil pellet is 0.1-
2cm, it is evenly distributed on impervious barrier or hardened ground, renovation agent is added in the heavy-metal contaminated soil of crushing and screening
And be stirred, adding proportion is the 3-5% of soil quality, and it is 12-18% to add water management soil moisture content, after being sufficiently mixed,
Outdoor normal temperature conserves 5-8 days.
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Cited By (9)
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CN108097714A (en) * | 2017-12-29 | 2018-06-01 | 成都新柯力化工科技有限公司 | A kind of heavy metals immobilization stabilizer and preparation method for soil remediation |
CN108251118A (en) * | 2018-01-25 | 2018-07-06 | 武汉瑞景环境修复工程有限公司 | Charcoal, heavy metal-polluted soil stabilization agent and preparation method thereof |
CN108296277A (en) * | 2018-01-23 | 2018-07-20 | 天津科创复兴科技咨询有限公司 | A kind of renovation agent and preparation method thereof for lead-contaminated soil |
CN110153168A (en) * | 2018-03-05 | 2019-08-23 | 苏州睿烁环境科技有限公司 | A kind of renovation agent of heavy-metal contaminated soil and preparation method thereof |
CN110937952A (en) * | 2019-10-28 | 2020-03-31 | 安徽省通源环境节能股份有限公司 | Preparation method of ecological restoration matrix for heavy metal contaminated soil |
CN111171830A (en) * | 2019-12-18 | 2020-05-19 | 浙江慧丰环保科技有限公司 | Passivator for soil heavy metal pollution treatment and preparation method thereof |
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CN108097714B (en) * | 2017-12-29 | 2019-01-22 | 漯河市傅牌农业科技有限公司 | A kind of heavy metals immobilization stabilizer and preparation method for soil remediation |
CN108296277A (en) * | 2018-01-23 | 2018-07-20 | 天津科创复兴科技咨询有限公司 | A kind of renovation agent and preparation method thereof for lead-contaminated soil |
CN108251118A (en) * | 2018-01-25 | 2018-07-06 | 武汉瑞景环境修复工程有限公司 | Charcoal, heavy metal-polluted soil stabilization agent and preparation method thereof |
CN108251118B (en) * | 2018-01-25 | 2021-04-13 | 武汉瑞景环境修复工程有限公司 | Biochar, soil heavy metal stabilizing agent and preparation method thereof |
CN110153168A (en) * | 2018-03-05 | 2019-08-23 | 苏州睿烁环境科技有限公司 | A kind of renovation agent of heavy-metal contaminated soil and preparation method thereof |
CN110937952A (en) * | 2019-10-28 | 2020-03-31 | 安徽省通源环境节能股份有限公司 | Preparation method of ecological restoration matrix for heavy metal contaminated soil |
CN111171830A (en) * | 2019-12-18 | 2020-05-19 | 浙江慧丰环保科技有限公司 | Passivator for soil heavy metal pollution treatment and preparation method thereof |
CN113416551A (en) * | 2021-05-28 | 2021-09-21 | 浙江问源环保科技股份有限公司 | Heavy metal contaminated soil composite repairing agent produced by using agricultural and sewage transport and maintenance wastes and preparation method thereof |
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