CN109092885A - Utilize the method for Pu root repairing heavy metal in soil cadmium pollution - Google Patents
Utilize the method for Pu root repairing heavy metal in soil cadmium pollution Download PDFInfo
- Publication number
- CN109092885A CN109092885A CN201810859283.3A CN201810859283A CN109092885A CN 109092885 A CN109092885 A CN 109092885A CN 201810859283 A CN201810859283 A CN 201810859283A CN 109092885 A CN109092885 A CN 109092885A
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- Prior art keywords
- root
- soil
- heavy metal
- cadmium
- repairing heavy
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
The present invention provides a kind of method using Pu root repairing heavy metal in soil cadmium pollution.The method using Pu root repairing heavy metal in soil cadmium pollution is the following steps are included: deep plough to heavy metal cadmium contaminated soil；Earthworm and its culture medium are added in soil after deep ploughing, and is cured under conditions of keeping soil moisture content is 50-75%；Pu root is planted in soil after curing, and heavy metal cadmium contaminated soil is repaired；Harvesting Pu takes root in strain.Method provided by the invention using Pu root repairing heavy metal in soil cadmium pollution can improve Pu root to the bioaccumulation efficiency of cadmium, be effectively retained soil fertility and improve soil texture.
Description
Technical field
The present invention relates to the phytoremediation technology fields of heavy metal pollution, specifically, being related to a kind of utilization Pu root reparation
The method of soil heavy metal cadmium.
Background technique
With the development of the industrial and agricultural productions such as smelting, plating, leather, fertilizer, cultivation, Cadmium Pollution in Soils is on the rise.Ring
Heavy metal cadmium has the characteristics that chronicity, concealment and irreversibility in border, pollutant poor mobility, stagnant in the medium
It stays time length, cannot be degraded by microorganisms, can also finally will affect environmental quality through approach such as food chain transmitting, harmful to human is strong
Health.Therefore, new cadmium pollution soil recovery technique is studied to have important practical significance.
It is carried out using the plant (including enriching plant or super enriching plant) to heavy metal with reparative potential heavy metal-polluted
The reparation of dye soil is one of the research hotspot of current environmental science, is had in soil pollution by heavy metal recovery technique biggish
Potentiality.The technology is that using to heavy metal there is the plant of enrichment or super enrichment ability to play the Metal uptake in contaminated soil
Come, be transported to above-ground plant parts organ, by periodically gathering in or harvesting above-ground plant parts, and is ashed an extraction huge sum of money
Belong to.Therefore, it has the various features such as small investment, high-efficient.
Develop that can be used for the plant of repairing heavy metal in soil cadmium pollution include Pu root at present, it has cadmium stronger
Patience and accumulation ability.However, the existing method using Pu root repairing heavy metal in soil cadmium pollution is only limitted to Pu root
It plants on contaminated soil, this mode needs repeatedly enrichment to can be only achieved preferable regulation effect, and it is not only time-consuming and laborious,
Also the cost of cadmium recycling can be improved, and is administering the fertility that will be greatly reduced soil while cadmium pollution.
Therefore, it is necessary to provide the new method using Pu root repairing heavy metal in soil cadmium pollution of one kind to avoid above-mentioned
Problem.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of sides using Pu root repairing heavy metal in soil cadmium pollution
Method, this method can improve Pu root to the bioaccumulation efficiency of cadmium, be effectively retained soil fertility and improve soil texture.
Technical scheme is as follows:
A method of utilizing Pu root repairing heavy metal in soil cadmium pollution, comprising the following steps:
It deep ploughs to heavy metal cadmium contaminated soil；
Earthworm and its culture medium are added in soil after deep ploughing, and is the condition of 50-75% keeping soil moisture content
Under cured；
Pu root is planted in soil after curing, and heavy metal cadmium contaminated soil is repaired；
Harvesting Pu takes root in strain.
Preferably, the additional amount of earthworm and its culture medium is 1500-2000Kg/ mus, and the weight of earthworm and earthworm culture medium
Amount is than being 1:30-1:50, and the cadmium content of earthworm culture medium is no more than 50.00 μ g/Kg.
Preferably, abscisic acid, auximone, the basic element of cell division, ethylene, red mould is sprayed within the growth period of Pu root
At least one of element, oligosaccharide and rape steroid gamma-lactone.
Preferably, spray plant hormone within the growth period of Pu root, the plant hormone include auxin, gibberellin,
At least one of the basic element of cell division, abscisic acid, ethylene and rape element sterol.
Preferably, the sprinkling period is 15-20 days, and fountain height is 8-12g/ mus.
Preferably, the method for Pu root repairing heavy metal in soil cadmium pollution is utilized further include:
Strain is taken root in using Pu and carries out biomass ferment production biogas, and collects the raffinate and residue after fermentation；Residue is dry
Ashing processing is carried out after dry, and soaks the product after ashing to obtain mixture, which is obtained by filtration solid product；Filtrate
Evaporation obtains crystallized product, wherein solid product and crystallized product can be used for extracting cadmium metal.
Preferably, the method for Pu root repairing heavy metal in soil cadmium pollution is utilized further include:
Ashing processing is carried out after Pu is taken root in strain drying, and soaks the product after ashing to obtain mixture, the mixing
Solid product is obtained by filtration in object；Filtrate evaporates to obtain crystallized product, wherein solid product and crystallized product can be used for extracting metal
Cadmium.
Preferably, filtrate obtains crystallized product using low-pressure distillation.
Preferably, Pu is taken root in into strain before processing and is cut into particle.
Preferably, the implantation methods of the Pu root are by the plantation of Pu root seed in soil after curing or by Pu
Youngster's root seedling replanting is in the soil after curing；The spacing in the rows of Pu root plantation is 25-35cm, line-spacing 35-40cm.
Method provided in an embodiment of the present invention using Pu root repairing heavy metal in soil cadmium pollution has following technology effect
Fruit: the method using Pu root repairing heavy metal in soil cadmium pollution includes deep ploughing to heavy metal cadmium contaminated soil；
Earthworm and its culture medium are added in soil after deep ploughing, and keeps soil moisture content to be cured under conditions of 50-75%；
Pu root is planted in soil after curing, and the soil of huge sum of money cadmium pollution is repaired；Harvesting Pu takes root in strain.It utilizes in this way
Deep ploughing and earthworm chesson are to improve soil texture, so as to promote the growth of Pu root root system to improve Pu root root system
The root content in the depth and unit soil volume of soil is penetrated, and Pu root root system is more flourishing, so that Pu root root system is to dirt
The assimilation effect for contaminating the cadmium metal in soil is better, so that being transported to the cadmium metal in Pu root above-ground plant parts organ
It is more, to achieve the effect that improve Pu root to the bioaccumulation efficiency of cadmium；Meanwhile decomposition product and the earthworm feeding of earthworm culture medium
Excreta after earthworm culture medium can also improve soil fertility and improve soil texture.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
The method using Pu root repairing heavy metal in soil cadmium pollution the following steps are included:
Step 1: deep ploughing to cadmium metal contaminated soil.Deep ploughing depth is generally 20-40cm, for example, can choose
Depth is 20cm, 25cm, 30cm, 40cm etc..
It Step 2: earthworm and its culture medium are added in soil after deep ploughing, and is 50-75% keeping soil moisture content
Under conditions of cured.Soil moisture content can be 50%, 60%, 70%, 75% etc., and the holding of soil moisture content can be with
Water management is sprayed by moisture transducer real-time monitoring soil moisture content, and by existing automated machine；Curing time one
As be 5-10 days, can be 5 days, 6 days, 7 days, 10 days etc., the specific curing time can work as Horizon according in the maturation period
Equal temperature selection, when temperature on average is relatively high, can suitably reduce the curing time.
Wherein, earthworm culture medium includes at least animality culture medium, vegetalitas culture medium, rubbish culture medium and Industry Waste
One of gurry culture medium.
Animality culture medium can choose the feces of livestock and poultry such as cow dung, horsehit, pig manure, chicken manure, duck excrement, sheep dung, rabbit excrement,
In, the excrement such as chicken, duck, sheep, rabbit are more containing nitrogen, when configuring earthworm culture medium no more than earthworm total weight of medium
25%.
Vegetalitas culture medium can choose stalk or various weeds, leaf of the crops such as corn, wheat, rice etc..
Vegetalitas culture medium can choose rotten Banana Leaf and bar, banana skin, rotten vegetable leaf, rotten fruit, watermelon peel, rotten tomato
Deng.
Industrial waste physical property culture medium can choose sugar residue, beer residue, edible fungus culturing material residue, furfural dregs, vinasse, sawdust
Deng.
It should be noted that the carbon-nitrogen ratio of earthworm culture medium controls between 20-30 for the ease of the growth of earthworm, and
Guarantee that it is not loosely hardened.
In the present embodiment, earthworm culture medium includes the following component with weight: agricultural crop straw powder 30-40
Part, cow dung, pig manure and 20-40 parts of 50-60 parts of powder, the wheat bran of chicken manure, 8-12 parts of shaddock peel powder, 2-5 parts of EM bacterium dry powder and phosphoric acid
5-10 parts of ammonium dihydrogen.Wherein, agricultural crop straw includes rice straw, wheat stalk and corn stover, and rice straw powder: small
Wheat Straw powder: the weight ratio of maize straw powder is 1:1.5:1；Cow dung powder: pig manure powder: the weight ratio of chicken manure powder is
2:1:1。
Step 3: planting Pu root in soil after curing, heavy metal cadmium contaminated soil is repaired.
Step 4: harvesting Pu takes root in strain.
In the present embodiment, the weight of earthworm and its culture medium is 1500-2000Kg/ mus, and earthworm and earthworm culture medium
Weight ratio be 1:30-1:50, the cadmium content of earthworm culture medium is no more than 50.00 μ g/Kg.Can for 1500Kg/ mus,
1600Kg/ mus, 1750Kg/ mus, 2000Kg/ mus etc.；
In the present embodiment, within the growth period of Pu root spray abscisic acid, auximone, the basic element of cell division, ethylene,
At least one of gibberellin, oligosaccharide and rape steroid gamma-lactone, alternatively, plant hormone is sprayed within the growth period of Pu root,
The plant hormone includes at least one of auxin, gibberellin, the basic element of cell division, abscisic acid, ethylene and rape element sterol.
The growth of Pu root root system can be promoted to penetrate in the depth and unit soil volume of soil to improve Pu root root system in this way
Root content, so as to improve every plant of Pu root to the enriching quantity of cadmium metal.
In the present embodiment, the sprinkling period is 15-20 days, and fountain height is 8-12g/ mus.For example, the sprinkling period can choose
It is 15 days, 16 days, 17 days, 20 days etc.；Fountain height is 8g/ mus, 9g/ mus, 10g/ mus, 12g/ mus etc..
In the present embodiment, the method for Pu root repairing heavy metal in soil cadmium pollution is utilized further include:
Strain is taken root in using Pu and carries out biomass ferment production biogas, and collects the raffinate and residue after fermentation；Residue is dry
Ashing processing is carried out after dry, and soaks the product after ashing to obtain mixture, which is obtained by filtration solid product；Filtrate
Evaporation obtains crystallized product, wherein solid product and crystallized product can be used for extracting cadmium metal.It is done alternatively, Pu is taken root in strain
Ashing processing is carried out after dry, and soaks the product after ashing to obtain mixture, which is obtained by filtration solid product；Filtrate
Evaporation obtains crystallized product, wherein solid product and crystallized product can be used for extracting cadmium metal.
In the present embodiment, by Pu take root in strain carry out biomass ferment production biogas in the way of Pu not only can be improved
The economic use value of youngster's root, and ashing processing can also reduce energy consumption；Meanwhile the present invention extract the method for cadmium metal can be with
The Pu for improving Unit Weight takes root in the rate of recovery of cadmium metal in strain, so as to residue after avoiding the occurrence of recycling to environment
Secondary pollution.
In the present embodiment, filtrate obtains crystallized product using low-pressure distillation.
In the present embodiment, Pu is taken root in into strain before processing and is cut into particle.The cutting that Pu takes root in strain, which can use, cuts
Careless machine, crusher etc..
In the present embodiment, the implantation methods of the Pu root are in the soil by the plantation of Pu root seed after curing
Or by Pu root seedling replanting in the soil after curing；The spacing in the rows of Pu root plantation is 25-35cm, line-spacing 35-40cm.Its
In, the implantation methods and Pu root seedling replanting method of Pu root seed plantation use conventional method in the prior art, to this
It does not illustrate.
Before the soil remediation in same contaminated regional choice multiple regions, multiple regions cadmium content be 10.00 ±
0.02mg/Kg), wherein Pu root is directly planted in embodiment as a comparison on contaminated soil, separately by a part of region
Pu root is planted in after contaminated reparation on soil using as the embodiment of the present invention by a part by means of the present invention.
Experiment discovery: the cadmium content of the contaminated soil of comparative example is 6.00 ± 0.02mg/Kg；The soil of embodiment
Cadmium content after reparation is 1.00 ± 0.02mg/Kg to 3.50 ± 0.02mg/Kg, and in 1500-2000Kg/ mus of ranges, with
The increase of the weight of earthworm and its culture medium, the cadmium content after soil remediation it is lower.In addition, experiment it has also been found that, when earthworm and
The weight of its culture medium is more than with the increase of earthworm and its weight of culture medium, to contain cadmium after soil remediation after 2000Kg/ mus
Amount variation is little.
It should be noted that testing soil is the pedotheque of the multiple point acquisitions in each region point, and sampling depth is
45cm；The measurement of cadmium is measured using GB17141-1997 " soil quality lead, Cadmium detrmination " in soil；In different embodiments, earthworm
The amount of earthworm and its culture medium, the amount of spray, curing time, deep ploughing depth and sprinkling period are different, and other conditions and comparison
Embodiment is identical.
Method provided by the above embodiment using Pu root repairing heavy metal in soil cadmium pollution at least has following technology
Effect: the method using Pu root repairing heavy metal in soil cadmium pollution includes carrying out deeply to heavy metal cadmium contaminated soil
It ploughs；Earthworm and its culture medium are added in soil after deep ploughing, and keeps soil moisture content ripe to carry out under conditions of 50-75%
Change；Pu root is planted in soil after curing, and the soil of huge sum of money cadmium pollution is repaired；Harvesting Pu takes root in strain.In this way
Using deep ploughing and earthworm chesson to improve soil texture, so as to promote the growth of Pu root root system to improve Pu root
Root system penetrates the root content in the depth and unit soil volume of soil, and Pu root root system is more flourishing, so that Pu root root system
It is better to the assimilation effect of the cadmium metal in contaminated soil, so that being transported to the gold in Pu root above-ground plant parts organ
Category cadmium is more, to have the function that improve Pu root to the bioaccumulation efficiency of cadmium；Meanwhile decomposition product and the earthworm of earthworm culture medium
Excreta after feeding earthworm culture medium can also improve soil fertility and improve soil texture.
More than, it is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, although this
Invention has been disclosed in the preferred embodiments as above, and however, it is not intended to limit the invention, any person skilled in the art,
Without departing from the scope of the present invention, when the technology contents using above-mentioned prompt make a little change or are modified to
With the equivalent embodiment of variation, but without departing from the technical solutions of the present invention, according to the technical essence of the invention to above
Any simple modification, equivalent change and modification made by embodiment, all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. a kind of method using Pu root repairing heavy metal in soil cadmium pollution, which comprises the following steps:
It deep ploughs to cadmium metal contaminated soil；
Earthworm and its culture medium are added in soil after deep ploughing, and under conditions of keeping soil moisture content is 50-75% into
Row curing；
Pu root is planted in soil after curing, and heavy metal cadmium contaminated soil is repaired；
Harvesting Pu takes root in strain.
2. the method according to claim 1 using Pu root repairing heavy metal in soil cadmium pollution, which is characterized in that described
The additional amount of earthworm and its culture medium is 1500-2000Kg/ mus, and the weight ratio of earthworm and culture medium is 1:30-1:50, described
The cadmium content of culture medium is no more than 50.00 μ g/Kg.
3. the method according to claim 1 using Pu root repairing heavy metal in soil cadmium pollution, which is characterized in that in Pu
In the growth period of youngster's root in sprinkling abscisic acid, auximone, the basic element of cell division, ethylene, gibberellin, oligosaccharide and rape sterol
At least one of ester.
4. the method according to claim 1 using Pu root repairing heavy metal in soil cadmium pollution, which is characterized in that in Pu
Plant hormone is sprayed in the growth period of youngster's root, the plant hormone includes auxin, gibberellin, the basic element of cell division, abscisic acid, second
At least one of alkene and rape element sterol.
5. the method according to claim 3 or 4 using Pu root repairing heavy metal in soil cadmium pollution, which is characterized in that
Spraying the period is 15-20 days, and fountain height is 8-12g/ mus.
6. the method according to claim 1 using Pu root repairing heavy metal in soil cadmium pollution, which is characterized in that also wrap
It includes:
Strain is taken root in using Pu and carries out biomass ferment production biogas, and collects the raffinate and residue after fermentation；After residue is dry
Ashing processing is carried out, and soaks the product after ashing to obtain mixture, which is obtained by filtration solid product；Filtrate evaporation
Obtain crystallized product, wherein solid product and crystallized product can be used for extracting cadmium metal.
7. the method according to claim 1 using Pu root repairing heavy metal in soil cadmium pollution, which is characterized in that also wrap
It includes:
Ashing processing is carried out after Pu is taken root in strain drying, and soaks the product after ashing to obtain mixture, the mixture mistake
Filter obtains solid product；Filtrate evaporates to obtain crystallized product, wherein solid product and crystallized product can be used for extracting cadmium metal.
8. the method according to claim 6 or 7 using Pu root repairing heavy metal in soil cadmium pollution, which is characterized in that
Filtrate obtains crystallized product using low-pressure distillation.
9. the method according to claim 6 or 7 using Pu root repairing heavy metal in soil cadmium pollution, which is characterized in that
Pu is taken root in into strain before processing and is cut into particle.
10. the method according to claim 1 using Pu root repairing heavy metal in soil cadmium pollution, which is characterized in that institute
The implantation methods for the Pu root stated are to plant Pu root seed in the soil after curing or by Pu root seedling replanting in ripe
In soil after change；The spacing in the rows of Pu root plantation is 25-35cm, line-spacing 35-40cm.
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| CN201810859283.3A CN109092885A (en) | 2018-07-31 | 2018-07-31 | Utilize the method for Pu root repairing heavy metal in soil cadmium pollution |
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