CN109731907A - A method of with industrial hemp remediating lead-contaminated soil - Google Patents
A method of with industrial hemp remediating lead-contaminated soil Download PDFInfo
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- CN109731907A CN109731907A CN201910020144.6A CN201910020144A CN109731907A CN 109731907 A CN109731907 A CN 109731907A CN 201910020144 A CN201910020144 A CN 201910020144A CN 109731907 A CN109731907 A CN 109731907A
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- lead
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Abstract
The invention discloses a kind of methods with industrial hemp remediating lead-contaminated soil, belong to the phytoremediation technology field of heavy metal pollution of soil, comprising: choose industrial hemp seed；Site preparation is carried out to lead-contaminated soil to be repaired, is applied fertilizer to the subsoil, and apply soil conditioner；The industrial hemp seed of selection is subjected to drilling in 4~June；Industrial hemp kind seedling stage carries out top dressing；Gather in mature industrial hemp, after measurement is repaired in lead-contaminated soil lead content, is repaired when the content of lead is less than or equal to 80mg/kg in lead-contaminated soil after the reparation successfully, if more than 80mg/kg then repeatedly step S1-S5.Method of the invention is good to the repairing effect of lead-contaminated soil, can practice, and have preferable economic value.
Description
Technical field
It a kind of is repaired the present invention relates to the phytoremediation technology field of heavy metal pollution of soil more particularly to industrial hemp
The method of lead-contaminated soil.
Background technique
Lead is a kind of heavy metal contaminants common in soil, with contaminated area is big, the residence time is long, is not easy in nature
Under the conditions of the features such as being removed, not only influence the yield and quality of crops but also human body entered by food chain, influence people's
Health.Currently, the recovery technique of heavy metal lead pollution soil can be divided into two classes: physical chemistry reparation and plant technology are repaired
It is multiple.Physical chemistry reparation includes soil moved in improve the original deep ploughing, isolation method, leaching method etc..Physical chemistry restorative procedure have it is at high cost, be difficult to
The limitations such as use, be difficult to manage on a large scale.Phytoremediation technology includes plant degradation, phytovolatilization, plant extraction and super rich
Collect plant.
Phytoremediation technology refer to using plant to the absorption of soil pollutant, volatilization, conversion, degradation, fixed function and go
Except the recovery technique of pollutant in soil.Phytoremediation is the current principal mode for solving heavy metal pollution, but traditional plant
Recovery technique mainly screens super enriching plant, utilizes super enriching plant rehabilitating soil.And the super enrichment that people find at present is planted
Object has the shortcomings that slow growth, biomass are small, also needs post-processing, therefore the lead total amount of whole strain accumulation without economic value
Limited, the reparation time limit is longer, causes arable land idle, is not appropriate for the heavy metal reparation that agriculture district is ploughed long-term, therefore cannot advise greatly
Mould promotes the use.
Summary of the invention
(1) goal of the invention
The object of the present invention is to provide a kind of methods with industrial hemp remediating lead-contaminated soil, it is intended to solve traditional plant
Restorative procedure biomass is small, repairs year limit for length, leads to not the problem of practical large-scale promotion is used without economic value.This hair
It is bright mainly by planting industrial hemp in lead contamination area, and using coating agent, soil conditioner and reasonable implantation methods,
And achieve the effect that repair that the time limit is short, have certain economic benefit, being capable of the utilization of practical large-scale promotion.
(2) technical solution
To solve the above problems, one aspect of the present invention provides a kind of side with industrial hemp remediating lead-contaminated soil
Method, comprising:
S1: industrial hemp seed is chosen.
S2: site preparation is carried out to lead-contaminated soil to be repaired, is applied fertilizer to the subsoil, and apply soil conditioner.
S3: the industrial hemp seed of selection is subjected to drilling in 4~June.
S4: top dressing is carried out in industrial hemp seed seedling stage.
S5: gathering in mature industrial hemp, and lead contamination is native after the content and reparation of lead in measurement industrial hemp respectively
The content of lead in earth, after the reparation in lead-contaminated soil the content of lead be less than or equal to repair when 80mg/kg successfully, if more than
80mg/kg then repeats step S1-S5.
Further, industrial hemp seed described in step S1 is fibrous type industrial hemp seed.
Further, industrial hemp seed described in step S1 can be selected from cloud fiber crops No. 1, cloud fiber crops No. 2, cloud fiber crops No. 3, cloud fiber crops
No. 4, cloud fiber crops No. 5, cloud fiber crops No. 6, cloud fiber crops No. 7, cloud fiber crops No. 8, cloud fiber crops miscellaneous No. 2 and cloud fiber crops one of miscellaneous No. 3 or a variety of industry
Cannabis seeds.
Further, step S1 is specifically included:
Further, in the step S2,
The base fertilizer includes urea, calcium superphosphate, potassium sulfate.
The soil conditioner includes one of disodium ethylene diamine tetraacetate, citric acid, organic fertilizer, earthworm liquid or more
Kind.
Further, step S2 is specifically included:
S21: it deep ploughed, carefully harrowed, flattened to lead-contaminated soil to be repaired.
S22: apply 12~14 ㎏ urea, 20~22 ㎏ calcium superphosphate, 7~9 ㎏ potassium sulfates per acre.
S23: it is organic to apply the disodium ethylene diamine tetraacetate of 17~20kg, the citric acid of 8~10kg, 50~70kg per acre
One of fertilizer, 3~5kg earthworm liquid are a variety of.
Further, the step S3 is specifically included:
In 4~June, the kind planting ditch of deep 4~6cm, 20~40cm of line-spacing are dug out in lead-contaminated soil to be repaired, is being planted
The industrial hemp seed of 1.5~2kg selection is sowed in ditch per acre, then drilling covers thickness 2~3cm fine grained soil.
Further, the step S4 is specifically included:
Top dressing is carried out in 2~3 pairs of leaf periods of industrial hemp, applies 6~8kg of urea per acre.
It digs trenches to drain the water away when flooded.
Further, wherein step S5 is specifically included:
S51: industrial hemp is gathered in 8~early September.
S52: the content of lead in lead-contaminated soil after industrial hemp is repaired is measured.
S53: the content of lead is less than or equal to repair successfully when 80mg/kg in lead-contaminated soil after the reparation, if more than 80mg/
Kg then repeats step S1-S5.
Industrial hemp biomass is big, resistance is strong, easy Cultivate administration, resistance to dense planting, drought-enduring, resistance to lean, well developed root system, growth speed
Spend the good characteristics such as fast feature.And have stronger patience and accumulation ability to heavy metal lead, it is a kind of more satisfactory for repairing
The plant of multiple heavy metal lead pollution soil.And industrial hemp is suitable for mechanized harvest, is suitable for large area and plants, to reduce
Maintenance cost.Using reasonable implantation methods, and to industrial hemp seed using coating agent, to soil application soil conditioner
It can promote enrichment of the industrial hemp to heavy metal lead, shorten and repair the time limit.The control in watering period can be improved industrial big
Numb yield and fiber quality.Industrial hemp is not edible-type crop, and repaired heavy metal lead contaminated soil also can be carried out conjunction later
The utilization of reason reaches certain economic value.
(3) beneficial effect
Above-mentioned technical proposal of the invention has following beneficial technical effect:
(1) the industrial hemp lead accumulation ability for the remediating lead-contaminated soil that the present invention uses by force can be complete in lead-contaminated soil
At normal growth cycle, the content of lead in soil is effectively reduced；Biomass can shorten greatly the reparation time limit；It is drought-enduring, resistance to lean, anti-
Worm disease-resistant performance is good convenient for management, at low cost；And certain economic benefit can be generated.
(2) present invention uses coating agent, improves industrial hemp in the germination percentage and survival rate of lead-contaminated soil, effective drop
Low cost.
(3) present invention uses soil conditioner prior to seeding, promotes enrichment of the industrial hemp to lead, shortens and repair year
Limit.
(4) present invention carries out field management appropriate in planting process, big by the means management industry such as applying fertilizer, draining
The growth cycle of fiber crops, improves the repairing effect of lead-contaminated soil.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment, to this
Invention is further described.It should be understood that these descriptions are merely illustrative, and it is not intended to limit the scope of the invention.This
Outside, in the following description, descriptions of well-known structures and technologies are omitted, so as not to unnecessarily obscure the concept of the present invention.
Experimental method in following embodiments is unless otherwise specified conventional method, material used in following embodiments, reagent
Deng being commercially available unless otherwise specified.
According to the application embodiment, a kind of method of remediating lead-contaminated soil, comprising the following steps:
S1: industrial hemp seed is chosen.
Different industrial hemps is different to the concentration effect of different heavy metals, and choosing suitable industrial hemp can be preferably
Remediating lead-contaminated soil.Hemp (Cannabis sativa L) is Cannabaceae Cannabis, and annual herb plant is China
Traditional industrial crops originate in ground, the countries and regions such as present Asia, Europe and South America such as India, Bhutan and plant extensively.And work
Sparetime university fiber crops (Industrial Hemp) are a kind of Hemp Varieties by improvement No Poison utility value, tetrahydrocannabinol (THC)
Content is lower than 0.3%.Industrial hemp plant itself can secret out of more than 140 kinds of phenolic substancess, the energy with good disease and insect resistance
Power, so not needing sporadicly to occur some pest and disease damages using insecticidal bactericide and nor affect on its yield and matter in planting process
It measures, therefore use industrial hemp to carry out remediating lead-contaminated soil as rehabilitation plant can further reduce cost.On tropical ground
The suitable area such as area or Yunnan can plant for two seasons in 1 year, can reduce the soil remediation time limit.
S2: site preparation is carried out to lead-contaminated soil to be repaired, is applied fertilizer to the subsoil, and apply soil conditioner.
Wherein soil refer to positioned at Terrestrial be capable of the loose porous substance of growing plant at and related physical geography want
Plain synthesis.And working as lead content in agricultural land is more than certain value, agricultural product will not meet quality and safety standard and generate risk.
Present implementation also has and repairs well to the soil of cadmium, mercury, arsenic, chromium, copper, nickel contamination other than can be with remediating lead-contaminated soil
Multiple effect, such as cloud fiber crops No. 2 have preferable repair to cadmium, copper contaminated soil.
S3: the industrial hemp seed of selection is subjected to drilling in 4~June.
Wherein the sowing time can be early April, mid-April, late April, the first tenday period of a month in May, mid-May, late May, June
The first tenday period of a month, mid-June, late June etc. but be not limited to it is above-mentioned enumerate, can according to practical soil tilth and locality weather and
The adjustment appropriate of the case where weather is preferably the first tenday period of a month in May, mid-May or late May in Yunnan.
S4: industrial hemp seedling stage carries out top dressing.
S5: gathering in mature industrial hemp, and lead contamination is native after the content and reparation of lead in measurement industrial hemp respectively
The content of lead in earth, after the reparation in lead-contaminated soil the content of lead be less than or equal to repair when 80mg/kg successfully, if more than
80mg/kg then repeats step S1-S5.The content for measuring lead in the industrial hemp fibers of harvest, can determine this batch of industrial hemp
Purposes, further increase economic value.
In an optional embodiment, industrial hemp seed described in step S1 is fibrous type industrial hemp seed.
In the cropping pattern of industrial hemp, wherein having fibrous type, the plantation of seed type, seed bar dual-purpose type and flower leaf type kind
Isotype is planted, is planted to prevent heavy metal from entering the food chain present invention using fibrous type.The industrial hemp of fibrous type plantation is in work
Skill maturity period, that is, fiber maturation phase is just gathered in.
In an optional embodiment, industrial hemp seed described in step S1 can be selected from cloud fiber crops No. 1, cloud numb No. 2, cloud
Fiber crops No. 3, cloud fiber crops No. 4, cloud fiber crops No. 5, cloud fiber crops No. 6, cloud fiber crops No. 7, cloud fiber crops No. 8, cloud fiber crops miscellaneous No. 2 and cloud fiber crops one of miscellaneous No. 3 or
A variety of industrial hemp seeds.The industrial hemp kind genetic resources source explanation:
Cloud fiber crops No. 1, Yunnan Agriculatural Academy's breeding forms, and in July, 2001 is made a joint checkup by Yunnan Province's variety certification committee member
It is fixed.
Cloud fiber crops No. 2, Inst of Economic Crops, Yunnan Provincia Academy Agriculture Sciences's breeding forms, and is examined by Yunnan Province's kind within 2007
Determine committee's authorization.
Cloud fiber crops No. 3, Inst of Economic Crops, Yunnan Provincia Academy Agriculture Sciences's breeding forms, and is examined by Yunnan Province's kind within 2007
Determine committee's authorization.
Cloud fiber crops No. 4, Inst of Economic Crops, Yunnan Provincia Academy Agriculture Sciences pass through Yunnan Province's variety certification committee in 2007
Authorization.
Cloud fiber crops No. 5, Inst of Economic Crops, Yunnan Provincia Academy Agriculture Sciences's breeding forms, and is examined by Yunnan Province's kind within 2013
Determine committee's authorization.
Cloud fiber crops No. 6, Inst of Economic Crops, Yunnan Provincia Academy Agriculture Sciences's breeding forms, and is examined by Yunnan Province's kind within 2014
Determine committee's authorization.
Cloud fiber crops No. 7, Inst of Economic Crops, Yunnan Provincia Academy Agriculture Sciences's breeding forms, and is examined by Yunnan Province's kind within 2014
Determine committee's authorization.
Cloud fiber crops No. 8, Yunnan Agriculatural Academy's breeding forms, and is authorized by Yunnan Province's variety certification committee within 2018.
Cloud fiber crops miscellaneous No. 2, Inst of Economic Crops, Yunnan Provincia Academy Agriculture Sciences's breeding forms, and passes through Yunnan Province's kind within 2015
Validation board's authorization.
Cloud fiber crops miscellaneous No. 3, Inst of Economic Crops, Yunnan Provincia Academy Agriculture Sciences's breeding forms, and passes through Yunnan Province's kind within 2015
Validation board's authorization.
Select the strong industrial hemp kind of lead accumulation ability can lead enriching quantity, reduce and repair the time limit.For an a variety of huge sum of moneys
The soil for belonging to combined pollution can also repair the soil by heavy metal pollution using kind between a variety of different industrial hemps simultaneously.
In an optional embodiment, in the step S2, the base fertilizer includes urea, calcium superphosphate, potassium sulfate.Rationally
Fertilising industrial hemp growth can be made more vigorous, improve to the resistance of heavy metal lead, increase lead enriching quantity.Base fertilizer can be with
Urea, calcium superphosphate, potassium sulfate are changed to the compound fertilizer of equal volume.
The soil conditioner includes one of disodium ethylene diamine tetraacetate, citric acid, organic fertilizer, earthworm liquid or more
Kind.Disodium ethylene diamine tetraacetate (EDTA-2Na, ethylenediaminetetraacetic acid) is a kind of common artificial chelating agent, can be with the lead in soil
Chelating, is allowed to activate, and improves absorption of the plant to lead.Citric acid is natural small molecule organic acid, can reduce soil pH value, favorably
In the absorption of plant pair heavy metal lead.Earthworm liquid is the water soluble fertilizer containing humic acid.Earthworm liquid can promote plant growth and subtract
Light pollutant stress effect.Three, which is applied in combination, can generate synergistic effect, enrichment of the enhancing industrial hemp to lead.
In an optional embodiment, step S2 is specifically included:
S21: it deep ploughed, carefully harrowed, flattened to lead-contaminated soil to be repaired.
S22: apply 12~14 ㎏ urea, 20~22 ㎏ calcium superphosphate, 7~9 ㎏ potassium sulfates per acre.Wherein to lead contamination soil
It is routine operation that earth, which is deep ploughed, carefully harrowed, flattened,.
Wherein the parts by weight of urea can for 12 ㎏, 13 ㎏, 14 ㎏ etc. but be not limited to it is above-mentioned enumerate, can be according to reality
Soil fertility carries out adjustment appropriate.
Wherein the parts by weight of calcium superphosphate can for 20 ㎏, 21 ㎏, 22 ㎏ etc. but be not limited to it is above-mentioned enumerate, can basis
Practical soil fertility carries out adjustment appropriate.
Wherein the parts by weight of potassium sulfate can for 7 ㎏, 8 ㎏, 9 ㎏ etc. but be not limited to it is above-mentioned enumerate, can be according to reality
The fertility of soil carries out adjustment appropriate.
S23: it is organic to apply the disodium ethylene diamine tetraacetate of 17~20kg, the citric acid of 8~10kg, 50~70kg per acre
One of fertilizer, 3~5kg earthworm liquid are a variety of.Wherein the parts by weight of disodium ethylene diamine tetraacetate can for per acre apply 17,
18,19,20kg, the aqueous solution that need to be configured to 2.0mmol/L are applied, and can also carry out tune appropriate according to actual effect
It is whole.
Wherein the parts by weight of citric acid can need to be configured to aqueous solution and be applied, specifically to apply 8,9,10kg per acre
Concentration is determines according to actual conditions.The parts by weight of citric acid, which add, to carry out adjustment appropriate according to actual effect.
Wherein the parts by weight of organic fertilizer can be to apply 50 ㎏, 55 ㎏, 60 ㎏, 65 ㎏, 70 ㎏, 75 ㎏, 80 ㎏ per acre
Deng but be not limited to it is above-mentioned enumerate, adjustment appropriate can be carried out according to actual effect, preferably 55~65 ㎏ can also be
Other parts by weight, such as can be 45~76 ㎏, 65~77 ㎏ or 54~60 ㎏.
Wherein the parts by weight of earthworm liquid can be to apply 3 ㎏, 3.5 ㎏, 4 ㎏, 4.5 ㎏, 5 ㎏ etc. per acre but be not limited to
It states and enumerates, adjustment appropriate can be carried out according to actual effect.
In an optional embodiment, the step S3 is specifically included:
In 4~June, the kind planting ditch of deep 4~6cm, 25~40cm of line-spacing are dug out in lead-contaminated soil to be repaired, is being planted
The industrial hemp seed of 1.5~2kg selection is sowed in ditch per acre, then drilling covers thickness 2~3cm fine grained soil.
Wherein line-spacing can for 25cm, 30cm, 35cm, 40cm etc. but be not limited to it is above-mentioned enumerate, can be according to local practical
Weather conditions and the adjustment appropriate of industrial hemp upgrowth situation, preferably 25~35cm, such line-spacing can be big for industry
The growth of fiber crops provides sufficient space, can quickly cover in this range after industrial hemp germination, save space, and protecting
More industrial hemps are planted under the normal hemp growing state of card industry, can be improved mu biomass in this way to improve to a huge sum of money
Belong to the enriching quantity of lead, reduces and repair the time limit.
Seed is equably broadcast strip by drilling, a kind of method of sowing, capable to keep certain distance between row, and can
Plot area is arranged as 30-60 square metres, it there are 1 meter of way between cell and cell, both can guarantee ventilation and penetrating light, grasp
Also facilitate.
Sowing time can be judged that Yunnan generally can be 4~June, preferably May according to soil soil moisture content.
The specific sowing time carries out adjustment appropriate according to local specific weather conditions, temperature, soil moisture content.
Wherein soil moisture content refers to the case where the case where water content number in crop topsoil soils, soil moisture, soil moisture by
The influence of the conditions such as atmosphere, soil property, vegetation is irrigating, is having reference value in sowing.
Per acre sowing 1.5~2kg industrial hemp capsuled seed can for 1.5,1.6,1.7,1.8,1.9,2kg etc. but unlimited
It is enumerated in above-mentioned, adjustment appropriate can be carried out according to the actual situation.The application rate of industrial hemp seed can guarantee to obtain every
Preferably per acre 2.8~30,000 plants of the industrial hemp of 2.5~3.5 ten thousand plants of mu, at this moment industrial hemp yield is best.
By GBJl45-90 standard, particle (particulate group) quality that particulate class soil is partial size less than or equal to 0.075mm be greater than or
Equal to the soil of gross mass 50%；Fine grained soil is that content is or not particle (coarse grain group) of the partial size more than or equal to 0.075mm but small dry 60mm
Soil greater than 25%.
In an optional embodiment, the step S4 is specifically included:
Top dressing is carried out in 2~3 pairs of leaf periods of industrial hemp, applies 6~8kg of urea per acre.It digs trenches to drain the water away when flooded.In soil moisture content
Watering can also be carried out when insufficient by 4~10 days/time of period and mends moisture in the soil, the parts by weight for the urea that wherein top dressing applies can be
Per acre 6,7,8kg etc. but be not limited to it is above-mentioned enumerate, adjustment appropriate can be carried out according to soil actual fertilizer.
Wherein the watering period can for 4 days, 5 days, 6 days, 7 days, 8 days, 9 days, 10 days etc. but be not limited to it is above-mentioned enumerate, can be with
Adjustment appropriate is carried out according to soil moisture content, preferably 5~7 days.
It can be improved the content and fibre length of industrial hemp fibers by certain watering period watering.Inventor's discovery exists
It is slightly different in influence and greenhouse of the industrial hemp watering period to industrial hemp fibers in field experiment, it is steamed in field planting
The effect of rising is more obvious, and show that the watering period is 4~10 days in conjunction with management cost, is further preferably 5~7 days.According to
The watering period of present implementation can make the content of industrial hemp fibers and fibre length preferable, and content of lignin is lower,
And it is more water-saving.
Wherein industrial hemp is afraid of flood, it is necessary to dig trenches to drain the water away in flood, can also ditch prevention waterlogging in advance.Specific prevention waterlogging mode can
To be adjusted according to practical weather and weather condition.
In an optional embodiment, wherein step S5 is specifically included:
S51: industrial hemp is gathered in 8~September.
It is wherein to be gathered in the industrial hemp industrial maturity period i.e. fiber maturation phase in the present invention, the harvesting of industrial hemp
Time is 8~September, and at this moment industrial hemp is the fiber maturation phase, i.e. staminiferous plant full-bloom stage.Harvesting generally by the end of August with September at the beginning of can
Harvest, aerial part are gathered in using reaping hook or machinery from basal part of stem, and every about 150 plants of bundle, 4~5 bundles are barricaded as a canopy and dry；Ground
Lower part can be dug out with hoe or machinery, dry harvest.
Wherein determine the content of lead in industrial hemp fibers in experimental stage, the pleasantly surprised discovery of inventor no matter lead contamination
Lead content is that lead content is always between 20~40mg/kg in how many industrial hemp fibers in soil, therefore remediating lead-contaminated soil
It no longer needs to measure lead content in industrial hemp again later, has saved cost.
Wherein in industrial hemp fibers lead measuring method are as follows: plant sample finishes 0.5h at 105 DEG C, and 70 DEG C of baking ovens dry
It does to constant weight, weighs each section dry mass with electronic balance, drying sample comminution standby is surveyed, with V (HNO3): V (HClO4)=5:
1 mixed liquor carries out micro-wave digestion, constant volume.With the content of the lead in atomic absorption spectrophotometer method measurement sample.
S52: the content of lead in lead-contaminated soil after industrial hemp is repaired is measured.
S53: the content of lead is less than or equal to repair successfully when 80mg/kg in lead-contaminated soil after the reparation, if more than 80mg/
Kg then repeats step S1-S5.Wherein graphite furnace atomic absorption spectrometry can be used in the measuring method of lead in soil.
When lead content is less than 80mg/kg in soil, which has met " farming land soil pollution risk management and control standard
(tentative) " requirement, can plant other crops or continue plant industrial hemp.It repeats step S1-S5 and continues to use work
Sparetime university fiber crops carry out lead contamination reparation to the soil, until lead content reaches standard requirements in the soil.
According to the another embodiment of the application, a kind of industrial hemp for remediating lead-contaminated soil, by above-mentioned
The method plantation of one remediating lead-contaminated soil is grown.Obtained industrial hemp has certain economic benefit.
According to the another embodiment of the application, a kind of application of remediating lead-contaminated soil industrial hemp, feature exists
In will repair after the industrial hemp harvesting of lead-contaminated soil as construction material.
In the industrial hemp fibers that inventor's discovery repaired lead-contaminated soil when lead content is higher in polluted soil
Lead content in 20~30mg/kg, lead content increases after using chelating agent, but also 30mg/kg or so.Therefore lead dirt was repaired
The industrial hemp of dye soil can be used as construction material use, be fully able to reach environmental protection standard.Construction material can be wallpaper,
Floor etc..The content that lead in measurement industrial hemp is not needed during soil remediation, has saved the cost of detection.It is repaired with other
Multiple plant can also use compared to industrial hemp after repairing lead-contaminated soil as construction material, greatly increase economic value.
And this economic value can be generated in entire repair process.
Industrial materials are not suitable as when the content of lead is greater than 90mg/kg in industrial hemp fibers, but can be used for its lead
The other materials of content no requirement (NR), which also can be used, repaired the industrial hemp of lead-contaminated soil to manufacture, such as pollutant process
Filtering material, such as Non-aqueous processing filter core, after use can a logical processing, save the cost.And other rehabilitation plants are generally repaired
It crosses after lead-contaminated soil and is directly ashed processing or is handled using other methods, treatment process also needs certain economic throwing
Enter.
Embodiment 1
Test place: Yunnan Province, the stockaded village great Tun Zhang Jia, Geju City, ground, mining area crop field 1
Yunnan Province, the stockaded village great Tun Zhang Jia, Geju City mining area field soil is sampled, the content for measuring wherein lead is
280.56mg/kg。
It deep ploughed, carefully harrowed, flattened to lead-contaminated soil to be repaired；Apply per acre 12 ㎏ urea, 20 ㎏ calcium superphosphate,
7 ㎏ potassium sulfates；Apply the disodium ethylene diamine tetraacetate of 17kg, the citric acid of 8kg, 50kg organic fertilizer and 3kg earthworm liquid per acre.Its
Middle disodium ethylene diamine tetraacetate is formulated as the solution of concentration 2.0mmol/L.
May 7, the seed furrow of deep 6cm, line-spacing 25cm are dug out in lead-contaminated soil to be repaired, according to sowing per acre
The numb No. 1 industrial hemp seed drilling of 1.5kg cloud, then covers thickness 2-3cm fine grained soil.
Top dressing is carried out to leaf period in industrial hemp 2, applies urea 6kg per acre；And it digs trenches to drain the water away.
It is gathered in industrial hemp of the early September to the fiber maturation phase, lead in soil after measurement industrial hemp is repaired
Content, measuring lead content is 265.32mg/kg, than reducing 15.24mg/kg before repairing, but also needs to repeat step S1-S5 to this
Continued to repair by the soil of lead contamination.Content by lead in measurement industrial hemp fibers is 28.30mg/kg.
Embodiment 2
Test place: Yunnan Province, the stockaded village great Tun Zhang Jia, Geju City, ground, mining area crop field 2
Yunnan Province, the stockaded village great Tun Zhang Jia, Geju City mining area field soil is sampled, the content for measuring wherein lead is
312.63mg/kg。
It deep ploughed, carefully harrowed, flattened to lead-contaminated soil to be repaired；Apply per acre 13 ㎏ urea, 21 ㎏ calcium superphosphate,
8 ㎏ potassium sulfates；Apply per acre the disodium ethylene diamine tetraacetate of 18kg, the citric acid of 9kg, 60kg organic fertilizer, in 4kg earthworm liquid
It is one or more.It is the solution that 2.0mmol/L applies that wherein disodium ethylene diamine tetraacetate, which is formulated as concentration,.
May 16, the kind planting ditch of deep 6cm, line-spacing 30cm are dug out in lead-contaminated soil to be repaired, it is every in kind of planting ditch
Then the numb No. 1 industrial hemp seed of mu sowing 1.8kg cloud, drilling cover thickness 3cm fine grained soil.
Top dressing is carried out to leaf period in industrial hemp 3, applies urea 7kg per acre；It digs trenches to drain the water away when flooded.
Technical maturity industrial hemp is gathered in early September；It measures after industrial hemp is repaired in lead-contaminated soil
The content of lead, measuring lead content is 285.07mg/kg, than reducing 27.56mg/kg before repairing；Need to repeat step S1-S5 to this
Continued to repair by the soil of lead contamination.Content by lead in measurement industrial hemp fibers is 30.89mg/kg
Embodiment 3
Test place: Yunnan Province, the stockaded village great Tun Zhang Jia, Geju City, ground, mining area crop field 3
Yunnan Province, the stockaded village great Tun Zhang Jia, Geju City mining area field soil is sampled, the content for measuring wherein lead is
Crop field is equally divided into 10 cells, and is numbered as 1-10 cell by 266.31mg/kg.
It deep ploughed, carefully harrowed, flattened to 1-10 cell；Apply 14 ㎏ urea, 22 ㎏ calcium superphosphate, 9 ㎏ sulfuric acid per acre
Potassium；Apply the disodium ethylene diamine tetraacetate of 20kg, the citric acid of 10kg, 70kg organic fertilizer, 5kg earthworm liquid per acre.Wherein second two
It is the solution that 2.0mmol/L applies that amine tetraacethyl disodium, which is formulated as concentration,.
May 25, the kind planting ditch of deep 6cm, line-spacing 40cm are dug out in 1-10 cell, is sowed per acre in kind of planting ditch
Then 2kg industrial hemp seed, drilling cover thickness 3cm fine grained soil, the industrial hemp of each cell sowing is shown in Table 1.
Top dressing is carried out to leaf period in industrial hemp 3, applies urea 8kg per acre；It digs trenches to drain the water away.
Industrial hemp is gathered at September 7th, measures the content such as table of lead in lead-contaminated soil after industrial hemp is repaired
Shown in 1, the content for measuring lead in industrial hemp fibers is as shown in table 1.
Situation is repaired in different community in 1 embodiment 3 of table
Cloud fiber crops No. 1, cloud fiber crops No. 2, cloud fiber crops No. 3, cloud fiber crops No. 4, cloud fiber crops No. 5, cloud numb No. 6, cloud fiber crops 7 after remediating lead-contaminated soil
Number, cloud fiber crops No. 8, cloud fiber crops miscellaneous No. 2 and miscellaneous No. 3 fibers of cloud fiber crops be used as construction material, other parts focus on.
It should be understood that above-mentioned specific embodiment of the invention is used only for exemplary illustration or explains of the invention
Principle, but not to limit the present invention.Therefore, that is done without departing from the spirit and scope of the present invention is any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.In addition, appended claims purport of the present invention
Covering the whole variations fallen into attached claim scope and boundary or this range and the equivalent form on boundary and is repairing
Change example.
Claims (9)
1. a kind of method with industrial hemp remediating lead-contaminated soil characterized by comprising
S1: industrial hemp seed is chosen；
S2: site preparation is carried out to lead-contaminated soil to be repaired, is applied fertilizer to the subsoil, and apply soil conditioner；
S3: the industrial hemp seed of selection is subjected to drilling in 4~June；
S4: industrial hemp seedling stage carries out top dressing；
S5: gathering in mature industrial hemp, the content of lead in lead-contaminated soil after repairing is measured, after reparation in lead-contaminated soil
The content of lead is less than or equal to repair when 80mg/kg successfully, then repeats step S1-S5 if more than 80mg/kg.
2. the method according to claim 1 with industrial hemp remediating lead-contaminated soil, which is characterized in that institute in step S1
Stating industrial hemp seed is fibrous type industrial hemp seed.
3. the method according to claim 2 with industrial hemp remediating lead-contaminated soil, which is characterized in that institute in step S1
Stating industrial hemp seed can be selected from cloud fiber crops No. 1, cloud fiber crops No. 2, cloud fiber crops No. 3, cloud fiber crops No. 4, cloud fiber crops No. 5, cloud numb No. 6, cloud fiber crops 7
Number, cloud fiber crops No. 8, cloud fiber crops miscellaneous No. 2 and cloud fiber crops one of miscellaneous No. 3 or a variety of.
4. the method according to claim 1 with industrial hemp remediating lead-contaminated soil, which is characterized in that the step S2
In,
The base fertilizer includes urea, calcium superphosphate, potassium sulfate；
The soil conditioner includes one of disodium ethylene diamine tetraacetate, citric acid, organic fertilizer, earthworm liquid or a variety of.
5. the method according to claim 4 with industrial hemp remediating lead-contaminated soil, which is characterized in that step S2 is specific
Include:
S21: it deep ploughed, carefully harrowed, flattened to lead-contaminated soil to be repaired；
S22: apply 12~14 ㎏ urea, 20~22 ㎏ calcium superphosphate, 7~9 ㎏ potassium sulfates per acre；
S23: per acre apply the disodium ethylene diamine tetraacetate of 17~20kg, the citric acid of 8~10kg, 50~70kg organic fertilizer, 3~
One of 5kg earthworm liquid is a variety of.
6. the method according to claim 1 with industrial hemp remediating lead-contaminated soil, which is characterized in that the step S4
It specifically includes:
Top dressing is carried out in 2~3 pairs of leaf periods of industrial hemp, applies 6~8kg of urea per acre；It digs trenches to drain the water away when flooded.
7. the method according to claim 1 with industrial hemp remediating lead-contaminated soil, which is characterized in that wherein step S5
It specifically includes:
S51: industrial hemp is gathered in 8~September；
S52: the content of lead in lead-contaminated soil after industrial hemp is repaired is measured；
S53: the content of lead is less than or equal to repair successfully when 80mg/kg in lead-contaminated soil after the reparation, then if more than 80mg/kg
Repeat step S1-S5.
8. a kind of industrial hemp for remediating lead-contaminated soil, which is characterized in that described in any item using claim 1-7
The method plantation of remediating lead-contaminated soil is grown.
9. a kind of application of remediating lead-contaminated soil industrial hemp, which is characterized in that the industry for repairing lead-contaminated soil is big
Construction material is used as after fiber crops harvesting.
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Application publication date: 20190510 |