CN109365494A - A kind of plant restoration method for administering cadmium manganese chromium combined contamination soil - Google Patents
A kind of plant restoration method for administering cadmium manganese chromium combined contamination soil Download PDFInfo
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- CN109365494A CN109365494A CN201811464797.5A CN201811464797A CN109365494A CN 109365494 A CN109365494 A CN 109365494A CN 201811464797 A CN201811464797 A CN 201811464797A CN 109365494 A CN109365494 A CN 109365494A
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- manganese chromium
- cadmium manganese
- feather cockscomb
- combined contamination
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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
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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Abstract
The invention discloses a kind of plant restoration methods for administering cadmium manganese chromium combined contamination soil.The application selects super enriching plant feather cockscomb and paniculate rockcress seed as test plant, it is planted in cadmium manganese chromium combined contamination soil in a manner of work, it was found that feather cockscomb and paniculate rockcress seed can have good absorption and concentration effect in cadmium manganese chromium combined contamination soil normal growth, and to the cadmium manganese chromium in contaminated soil.Meanwhile the application improves the Tiny ecosystem of soil, strengthens feather cockscomb and paniculate rockcress seed to the assimilation effect of cadmium manganese chromium, improve the remediation efficiency of cadmium manganese chromium combined contamination soil by applying biomass carbon and composite soil modifier.
Description
Technical field
The present invention relates to heavy metal-polluted soil recovery technique fields, and in particular to a kind of to administer cadmium manganese chromium combined contamination soil
Plant restoration method.
Background technique
In general the heavy metal element in soil mainly include cadmium (Cd), chromium (Cr), mercury (Hg), nickel (Ni), arsenic (As),
Copper (Cu), lead (Pb) and manganese (Mn) etc., these heavy metals have in the soil the poly- property of generality, concealment, table, refractory organics and
The features such as irreversibility, these features make heavy metal pollution become the one kind for being least easy to repair in all kinds of pollutions of soil.By
How, reparation difficulty big in heavy-metal contaminated soil harmfulness, therefore, repair contaminated by heavy metals soil and now have become entirely
The problem of ball many scientist's primary studies.
The method that heavy metal pollution is widely used is administered under the conditions of existing domestic technique mainly includes two aspects that one is make
The occurrence patterns of heavy metal ions in soil change, and these heavy metal elements are fixed, and are existed with weakening heavy metal
The ability of migration and bioavailability in soil environment；Another main method is using engineering or biology, plant
Object technology clears out the heavy metal in soil, keeps the content of heavy metal close or is less than background value.Based on above two
Thinking, different restorative procedures come into being with measure, and generally speaking have following several: physical method, chemical method, biology are repaired
Multiple method.But compared to the biological method of environment-friendly type for, traditional physical chemistry restorative procedure rehabilitating soil it is at high cost, hold
Destructible soil script ecologic structure and serious secondary pollution can be caused.So these types of method is compared, biology is repaired
Multiple method will be the following optimal repairing polluted soil method.Phytoremediation belongs to biological prosthetic important a member, and phytoremediation is
Refer to by certain specific planting on the soil of heavy metal pollution, and the plant to the pollution element in soil have it is special
Absorption accumulation ability, plant harvest and carrying out is dealt carefully with into set, the heavy metal element is removed into soil, to reach dirty
Dye administers the purpose with restoration of the ecosystem.However, most of over-accumulated plant, is only capable of accumulating one or two kinds of heavy metal elements,
It cannot achieve the improvement requirement that various heavy pollutes in practical soil.
Summary of the invention
It is an object of the invention to a kind of improvement cadmium manganese chromium combined pollution soil is provided in place of overcome the deficiencies in the prior art
The plant restoration method of earth improves the remediation efficiency of soil, realizes the improvement of various heavy pollution in soil.
To achieve the above object, the technical solution adopted by the present invention is as follows:
A kind of plant restoration method for administering cadmium manganese chromium combined contamination soil, comprising the following steps:
(1) biomass carbon is added in cadmium manganese chromium combined contamination soil, the applied amount of biomass carbon is the compound dirt of cadmium manganese chromium
Contaminate the 3%~6% of soil quality；
(2) feather cockscomb seedling and paniculate rockcress seed seedling are planted into cadmium manganese chromium combined contamination soil, is led in a manner of work
Cross the cadmium manganese chromium in the root system absorption contaminated soil of feather cockscomb and paniculate rockcress seed；
(3) when feather cockscomb grows to the maturity period, apply composite soil modifier, composite earth to cadmium manganese chromium combined contamination soil
The applied amount of earth modifying agent is the 3%~4.5% of cadmium manganese chromium combined contamination soil quality, and the composite soil modifier includes alkane
Base glucosides and aspartic acid diethoxy succinic acid；
(4) when feather cockscomb grows to floor portion biomass maximum, feather cockscomb above-ground organs are removed from contaminated soil, is carried out
Harmless treatment；When paniculate rockcress seed grows to floor portion biomass maximum, by paniculate rockcress seed above-ground organs from contaminated soil
It removes, carries out harmless treatment；
(5) it after feather cockscomb and paniculate rockcress seed gather in, digs again, repeats the operation of step (1) to (4), by 10~
After 15 continuous plantations and harvest, the active cadmium manganese chromium in soil is remarkably decreased.
The preferred super enriching plant feather cockscomb of the application and paniculate rockcress seed are as test plant, and in a manner of work, cadmium is arrived in plantation
In manganese chromium combined contamination soil, it is found that feather cockscomb and paniculate rockcress seed can be in cadmium manganese chromium combined contamination soil normal growths, and to dirt
The cadmium manganese chromium contaminated in soil has good absorption and concentration effect.Meanwhile the application is by applying biomass carbon and composite earth
Earth modifying agent strengthens feather cockscomb and paniculate rockcress seed to the assimilation effect of cadmium manganese chromium, improves the reparation effect of cadmium manganese chromium combined contamination soil
Rate.Alkyl glycosides is a kind of nonionic surface active agent of green, and aspartic acid diethoxy succinic acid is degradability chelating
Agent, the two compounding, can be used as the modifying agent for strengthening feather cockscomb and paniculate rockcress seed remediating heavy metal.
As the preferred embodiment of the plant restoration method of the present invention for administering cadmium manganese chromium combined contamination soil, institute
It states in step (2), makees 1 row feather cockscomb between 1~2 row paniculate rockcress seed of plantation.
As the preferred embodiment of the plant restoration method of the present invention for administering cadmium manganese chromium combined contamination soil, institute
State in step (2), when feather cockscomb seedling it is long to 8~10cm when, cut off the terminal bud of feather cockscomb seedling.
The inhibiting effect that feather cockscomb and paniculate rockcress seed terminal bud grow lateral bud can be effectively relieved by abolishing apical dominance, promote to plant
Object growth, increases the increment of plant, dramatically increases the content of beary metal in feather cockscomb and paniculate rockcress seed blade, effectively improves a huge sum of money
Belong to polluted soil phyto repairing effect, and easy to operate, it is economical, it is pollution-free.
As the preferred embodiment of the plant restoration method of the present invention for administering cadmium manganese chromium combined contamination soil, institute
State in step (2), when paniculate rockcress seed seedling it is long to 5~12cm when, cut off the terminal bud of paniculate rockcress seed seedling.
As the preferred embodiment of the plant restoration method of the present invention for administering cadmium manganese chromium combined contamination soil, institute
The mass ratio for stating alkyl glycosides and aspartic acid diethoxy succinic acid is 1:1~2.5.
As the preferred embodiment of the plant restoration method of the present invention for administering cadmium manganese chromium combined contamination soil, institute
The mass ratio for stating alkyl glycosides and aspartic acid diethoxy succinic acid is 1:1.5.
The application passes through the mass ratio of experimental control alkyl glycosides and aspartic acid diethoxy succinic acid, is advantageously implemented
The chelating of cadmium manganese chromium and passivation in soil, can significantly strengthen feather cockscomb and paniculate rockcress seed repairs the effect of cadmium manganese chromium combined contamination soil
Fruit.
As the preferred embodiment of the plant restoration method of the present invention for administering cadmium manganese chromium combined contamination soil, institute
The raw material for stating biomass carbon is pine bark and peanut shell.
As the preferred embodiment of the plant restoration method of the present invention for administering cadmium manganese chromium combined contamination soil, institute
State 2~5:1 of mass ratio of pine bark and peanut shell.
Raw material is used to be conducive to the cadmium manganese chromium in degradation soil, effective activation soil for the biomass carbon of pine bark and peanut shell
Earth promotes the good biosphere of Zinc fractions, improves the environment of soil.
As the preferred embodiment of the plant restoration method of the present invention for administering cadmium manganese chromium combined contamination soil, institute
Stating harmless treatment includes innoxious landfill after burning and compressing.
The present invention also provides feather cockscombs and paniculate rockcress seed in the application administered in cadmium manganese chromium combined contamination soil.Feather cockscomb and circle
Boring southern mustard has collaboration
Compared with prior art, the invention has the benefit that
The preferred super enriching plant feather cockscomb of the application and paniculate rockcress seed plant cadmium manganese in a manner of work as test plant
In chromium combined contamination soil, it is found that feather cockscomb and paniculate rockcress seed can be in cadmium manganese chromium combined contamination soil normal growths, and to pollution
Cadmium manganese chromium in soil has good absorption and concentration effect.Meanwhile the application is by applying biomass carbon and composite soil
Modifying agent improves the Tiny ecosystem of soil, strengthens feather cockscomb and paniculate rockcress seed to the assimilation effect of cadmium manganese chromium, improves the compound dirt of cadmium manganese chromium
Contaminate the remediation efficiency of soil.
Detailed description of the invention
Fig. 1 is the number of blade of feather cockscomb and the paniculate rockcress seed growth 50 days of embodiment 1 and embodiment 2.
Fig. 2 is the root dry weight of feather cockscomb and the paniculate rockcress seed growth 50 days of embodiment 1 and embodiment 2.
Fig. 3 is the stem weight of feather cockscomb and the paniculate rockcress seed growth 50 days of embodiment 1 and embodiment 2.
Fig. 4 is the leaf dry weight of feather cockscomb and the paniculate rockcress seed growth 50 days of embodiment 1 and embodiment 2.
Specific embodiment
Purposes, technical schemes and advantages in order to better illustrate the present invention, below in conjunction with specific embodiment to the present invention
It further illustrates.It will be appreciated by those skilled in the art that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Soil quality in the present invention refers to the quality of topsoil (0~20cm).
In embodiment, used experimental method is conventional method unless otherwise specified, material used, reagent etc.,
It is commercially available unless otherwise specified.
Embodiment 1
A kind of plant restoration method for administering cadmium manganese chromium combined contamination soil, comprising the following steps:
(1) in Guangdong mining area periphery vegetable plot, implement to repair with the plot 2m × 4m；It is compound in cadmium manganese chromium after clearing up weeds
Biomass carbon is added in contaminated soil, the applied amount of biomass carbon is the 3% of cadmium manganese chromium combined contamination soil quality, the biology
The raw material of matter charcoal is the pine bark and peanut shell of mass ratio 2:1；
(2) it selects the seed of full wild feather cockscomb (Celosia argentea Linn) to be equably seeded in and fills with sand
It in the seed plate of grain, is cultivated between 20 DEG C -35 DEG C, watering daily keeps wet, can obtain feather cockscomb seedling within one week；Paniculate rockcress seed
(Arabis Paniculata) seed is dipped in 5 hours, and after opening in dark place germination 4 days, the nursery in the normal soil in greenhouse is obtained
Paniculate rockcress seed seedling；By feather cockscomb seedling and paniculate rockcress seed seedling in a manner of work, plant into cadmium manganese chromium combined contamination soil,
Wherein, plant and make 1 row feather cockscomb between 1 row paniculate rockcress seed, line space is 30~40cm, and column pitch is 30~40cm, by feather cockscomb and
The root system of paniculate rockcress seed absorbs the cadmium manganese chromium in contaminated soil；
(3) when feather cockscomb grows to the maturity period, apply composite soil modifier, composite earth to cadmium manganese chromium combined contamination soil
The applied amount of earth modifying agent is the 3% of cadmium manganese chromium combined contamination soil quality, and the composite soil modifier includes alkyl glycosides
With aspartic acid diethoxy succinic acid, the mass ratio of the alkyl glycosides and aspartic acid diethoxy succinic acid is 1:1.5；
(4) when feather cockscomb grows to floor portion biomass maximum, feather cockscomb above-ground organs are removed from contaminated soil, is carried out
Harmless treatment；When paniculate rockcress seed grows to floor portion biomass maximum, by paniculate rockcress seed above-ground organs from contaminated soil
It removes, carries out harmless treatment；
(5) it after feather cockscomb and paniculate rockcress seed gather in, digs again, the operation of step (1) to (4) is repeated, by 15 times
After continuous plantation and harvest, the active cadmium manganese chromium in soil is remarkably decreased.
Embodiment 2
A kind of plant restoration method for administering cadmium manganese chromium combined contamination soil, comprising the following steps:
(1) in Guangdong mining area periphery vegetable plot, implement to repair with the plot 2m × 4m；It is compound in cadmium manganese chromium after clearing up weeds
Biomass carbon is added in contaminated soil, the applied amount of biomass carbon is the 3% of cadmium manganese chromium combined contamination soil quality, the biology
The raw material of matter charcoal is the pine bark and peanut shell of mass ratio 2:1；
(2) it selects the seed of full wild feather cockscomb (Celosia argentea Linn) to be equably seeded in and fills with sand
It in the seed plate of grain, is cultivated between 20 DEG C -35 DEG C, watering daily keeps wet, can obtain feather cockscomb seedling within one week；Paniculate rockcress seed
(Arabis Paniculata) seed is dipped in 5 hours, and after opening in dark place germination 4 days, the nursery in the normal soil in greenhouse is obtained
Paniculate rockcress seed seedling；By feather cockscomb seedling and paniculate rockcress seed seedling in a manner of work, plant into cadmium manganese chromium combined contamination soil,
Wherein, make 1 row feather cockscomb between 1 row paniculate rockcress seed of plantation, line space is 30~40cm, and column pitch is 30~40cm；When feather cockscomb seedling
It is long to 8~10cm when, cut off the terminal bud of feather cockscomb seedling；When paniculate rockcress seed seedling it is long to 5~12cm when, cut off paniculate rockcress seed seedling
Terminal bud；The cadmium manganese chromium in contaminated soil is absorbed by the root system of feather cockscomb and paniculate rockcress seed；
(3) when feather cockscomb grows to the maturity period, apply composite soil modifier, composite earth to cadmium manganese chromium combined contamination soil
The applied amount of earth modifying agent is the 3% of cadmium manganese chromium combined contamination soil quality, and the composite soil modifier includes alkyl glycosides
With aspartic acid diethoxy succinic acid, the mass ratio of the alkyl glycosides and aspartic acid diethoxy succinic acid is 1:1.5；
(4) when feather cockscomb grows to floor portion biomass maximum, feather cockscomb above-ground organs are removed from contaminated soil, is carried out
Harmless treatment；When paniculate rockcress seed grows to floor portion biomass maximum, by paniculate rockcress seed above-ground organs from contaminated soil
It removes, carries out harmless treatment；
(5) it after feather cockscomb and paniculate rockcress seed gather in, digs again, the operation of step (1) to (4) is repeated, by 15 times
After continuous plantation and harvest, the active cadmium manganese chromium in soil is remarkably decreased.
Embodiment 3
A kind of plant restoration method for administering cadmium manganese chromium combined contamination soil, comprising the following steps:
(1) in Guangdong mining area periphery vegetable plot, implement to repair with the plot 2m × 4m；It is compound in cadmium manganese chromium after clearing up weeds
Biomass carbon is added in contaminated soil, the applied amount of biomass carbon is the 3% of cadmium manganese chromium combined contamination soil quality, the biology
The raw material of matter charcoal is the pine bark and peanut shell of mass ratio 2:1；
(2) it selects the seed of full wild feather cockscomb (Celosia argentea Linn) to be equably seeded in and fills with sand
It in the seed plate of grain, is cultivated between 20 DEG C -35 DEG C, watering daily keeps wet, can obtain feather cockscomb seedling within one week；Paniculate rockcress seed
(Arabis Paniculata) seed is dipped in 5 hours, and after opening in dark place germination 4 days, the nursery in the normal soil in greenhouse is obtained
Paniculate rockcress seed seedling；By feather cockscomb seedling and paniculate rockcress seed seedling in a manner of work, plant into cadmium manganese chromium combined contamination soil,
Wherein, make 1 row feather cockscomb between 1~2 row paniculate rockcress seed of plantation, line space is 30~40cm, and column pitch is 30~40cm；As feather cockscomb children
Seedling it is long to 8~10cm when, cut off the terminal bud of feather cockscomb seedling；When paniculate rockcress seed seedling it is long to 5~12cm when, cut off paniculate rockcress seed children
The terminal bud of seedling；The cadmium manganese chromium in contaminated soil is absorbed by the root system of feather cockscomb and paniculate rockcress seed；
(3) when feather cockscomb grows to the maturity period, apply composite soil modifier, composite earth to cadmium manganese chromium combined contamination soil
The applied amount of earth modifying agent is the 3% of cadmium manganese chromium combined contamination soil quality, and the composite soil modifier includes alkyl glycosides
With aspartic acid diethoxy succinic acid, the mass ratio of the alkyl glycosides and aspartic acid diethoxy succinic acid is 1:1；
(4) when feather cockscomb grows to floor portion biomass maximum, feather cockscomb above-ground organs are removed from contaminated soil, is carried out
Harmless treatment；When paniculate rockcress seed grows to floor portion biomass maximum, by paniculate rockcress seed above-ground organs from contaminated soil
It removes, carries out harmless treatment；
(5) it after feather cockscomb and paniculate rockcress seed gather in, digs again, the operation of step (1) to (4) is repeated, by 15 times
After continuous plantation and harvest, the active cadmium manganese chromium in soil is remarkably decreased.
Embodiment 4
A kind of plant restoration method for administering cadmium manganese chromium combined contamination soil, comprising the following steps:
(1) in Guangdong mining area periphery vegetable plot, implement to repair with the plot 2m × 4m；It is compound in cadmium manganese chromium after clearing up weeds
Biomass carbon is added in contaminated soil, the applied amount of biomass carbon is the 3% of cadmium manganese chromium combined contamination soil quality, the biology
The raw material of matter charcoal is the pine bark and peanut shell of mass ratio 2:1；
(2) it selects the seed of full wild feather cockscomb (Celosia argentea Linn) to be equably seeded in and fills with sand
It in the seed plate of grain, is cultivated between 20 DEG C -35 DEG C, watering daily keeps wet, can obtain feather cockscomb seedling within one week；Paniculate rockcress seed
(Arabis Paniculata) seed is dipped in 5 hours, and after opening in dark place germination 4 days, the nursery in the normal soil in greenhouse is obtained
Paniculate rockcress seed seedling；By feather cockscomb seedling and paniculate rockcress seed seedling in a manner of work, plant into cadmium manganese chromium combined contamination soil,
Wherein, make 1 row feather cockscomb between 1~2 row paniculate rockcress seed of plantation, line space is 30~40cm, and column pitch is 30~40cm；As feather cockscomb children
Seedling it is long to 8~10cm when, cut off the terminal bud of feather cockscomb seedling；When paniculate rockcress seed seedling it is long to 5~12cm when, cut off paniculate rockcress seed children
The terminal bud of seedling；The cadmium manganese chromium in contaminated soil is absorbed by the root system of feather cockscomb and paniculate rockcress seed；
(3) when feather cockscomb grows to the maturity period, apply composite soil modifier, composite earth to cadmium manganese chromium combined contamination soil
The applied amount of earth modifying agent is the 3% of cadmium manganese chromium combined contamination soil quality, and the composite soil modifier includes alkyl glycosides
With aspartic acid diethoxy succinic acid, the mass ratio of the alkyl glycosides and aspartic acid diethoxy succinic acid is 1:2.5；
(4) when feather cockscomb grows to floor portion biomass maximum, feather cockscomb above-ground organs are removed from contaminated soil, is carried out
Harmless treatment；When paniculate rockcress seed grows to floor portion biomass maximum, by paniculate rockcress seed above-ground organs from contaminated soil
It removes, carries out harmless treatment；
(5) it after feather cockscomb and paniculate rockcress seed gather in, digs again, the operation of step (1) to (4) is repeated, by 15 times
After continuous plantation and harvest, the active cadmium manganese chromium in soil is remarkably decreased.
Embodiment 5
A kind of plant restoration method for administering cadmium manganese chromium combined contamination soil, comprising the following steps:
(1) in Guangdong mining area periphery vegetable plot, implement to repair with the plot 2m × 4m；It is compound in cadmium manganese chromium after clearing up weeds
Biomass carbon is added in contaminated soil, the applied amount of biomass carbon is the 5% of cadmium manganese chromium combined contamination soil quality, the biology
The raw material of matter charcoal is the pine bark and peanut shell of mass ratio 4:1；
(2) it selects the seed of full wild feather cockscomb (Celosia argentea Linn) to be equably seeded in and fills with sand
It in the seed plate of grain, is cultivated between 20 DEG C -35 DEG C, watering daily keeps wet, can obtain feather cockscomb seedling within one week；Paniculate rockcress seed
(Arabis Paniculata) seed is dipped in 5 hours, and after opening in dark place germination 4 days, the nursery in the normal soil in greenhouse is obtained
Paniculate rockcress seed seedling；By feather cockscomb seedling and paniculate rockcress seed seedling in a manner of work, plant into cadmium manganese chromium combined contamination soil,
Wherein, make 1 row feather cockscomb between 1~2 row paniculate rockcress seed of plantation, line space is 30~40cm, and column pitch is 30~40cm；As feather cockscomb children
Seedling it is long to 8~10cm when, cut off the terminal bud of feather cockscomb seedling；When paniculate rockcress seed seedling it is long to 5~12cm when, cut off paniculate rockcress seed children
The terminal bud of seedling；The cadmium manganese chromium in contaminated soil is absorbed by the root system of feather cockscomb and paniculate rockcress seed；
(3) when feather cockscomb grows to the maturity period, apply composite soil modifier, composite earth to cadmium manganese chromium combined contamination soil
The applied amount of earth modifying agent is the 4% of cadmium manganese chromium combined contamination soil quality, and the composite soil modifier includes alkyl glycosides
With aspartic acid diethoxy succinic acid, the mass ratio of the alkyl glycosides and aspartic acid diethoxy succinic acid is 1:1.5；
(4) when feather cockscomb grows to floor portion biomass maximum, feather cockscomb above-ground organs are removed from contaminated soil, is carried out
Harmless treatment；When paniculate rockcress seed grows to floor portion biomass maximum, by paniculate rockcress seed above-ground organs from contaminated soil
It removes, carries out harmless treatment；
(5) it after feather cockscomb and paniculate rockcress seed gather in, digs again, the operation of step (1) to (4) is repeated, by 15 times
After continuous plantation and harvest, the active cadmium manganese chromium in soil is remarkably decreased.
Embodiment 6
A kind of plant restoration method for administering cadmium manganese chromium combined contamination soil, comprising the following steps:
(1) in Guangdong mining area periphery vegetable plot, implement to repair with the plot 2m × 4m；It is compound in cadmium manganese chromium after clearing up weeds
Biomass carbon is added in contaminated soil, the applied amount of biomass carbon is the 5% of cadmium manganese chromium combined contamination soil quality, the biology
The raw material of matter charcoal is the pine bark and peanut shell of mass ratio 5:1；
(2) it selects the seed of full wild feather cockscomb (Celosia argentea Linn) to be equably seeded in and fills with sand
It in the seed plate of grain, is cultivated between 20 DEG C -35 DEG C, watering daily keeps wet, can obtain feather cockscomb seedling within one week；Paniculate rockcress seed
(Arabis Paniculata) seed is dipped in 5 hours, and after opening in dark place germination 4 days, the nursery in the normal soil in greenhouse is obtained
Paniculate rockcress seed seedling；By feather cockscomb seedling and paniculate rockcress seed seedling in a manner of work, plant into cadmium manganese chromium combined contamination soil,
Wherein, make 1 row feather cockscomb between 1~2 row paniculate rockcress seed of plantation, line space is 30~40cm, and column pitch is 30~40cm；As feather cockscomb children
Seedling it is long to 8~10cm when, cut off the terminal bud of feather cockscomb seedling；When paniculate rockcress seed seedling it is long to 5~12cm when, cut off paniculate rockcress seed children
The terminal bud of seedling；The cadmium manganese chromium in contaminated soil is absorbed by the root system of feather cockscomb and paniculate rockcress seed；
(3) when feather cockscomb grows to the maturity period, apply composite soil modifier, composite earth to cadmium manganese chromium combined contamination soil
The applied amount of earth modifying agent is the 4.5% of cadmium manganese chromium combined contamination soil quality, and the composite soil modifier includes alkyl sugar
The mass ratio of glycosides and aspartic acid diethoxy succinic acid, the alkyl glycosides and aspartic acid diethoxy succinic acid is 1:1.5；
(4) when feather cockscomb grows to floor portion biomass maximum, feather cockscomb above-ground organs are removed from contaminated soil, is carried out
Harmless treatment；When paniculate rockcress seed grows to floor portion biomass maximum, by paniculate rockcress seed above-ground organs from contaminated soil
It removes, carries out harmless treatment；
(5) it after feather cockscomb and paniculate rockcress seed gather in, digs again, the operation of step (1) to (4) is repeated, by 15 times
After continuous plantation and harvest, the active cadmium manganese chromium in soil is remarkably decreased.
Embodiment 7
A kind of plant restoration method for administering cadmium manganese chromium combined contamination soil, comprising the following steps:
(1) in Guangdong mining area periphery vegetable plot, implement to repair with the plot 2m × 4m；It is compound in cadmium manganese chromium after clearing up weeds
Biomass carbon is added in contaminated soil, the applied amount of biomass carbon is the 6% of cadmium manganese chromium combined contamination soil quality, the biology
The raw material of matter charcoal is the pine bark and peanut shell of mass ratio 5:1；
(2) it selects the seed of full wild feather cockscomb (Celosia argentea Linn) to be equably seeded in and fills with sand
It in the seed plate of grain, is cultivated between 20 DEG C -35 DEG C, watering daily keeps wet, can obtain feather cockscomb seedling within one week；Paniculate rockcress seed
(Arabis Paniculata) seed is dipped in 5 hours, and after opening in dark place germination 4 days, the nursery in the normal soil in greenhouse is obtained
Paniculate rockcress seed seedling；By feather cockscomb seedling and paniculate rockcress seed seedling in a manner of work, plant into cadmium manganese chromium combined contamination soil,
Wherein, make 1 row feather cockscomb between 1~2 row paniculate rockcress seed of plantation, line space is 30~40cm, and column pitch is 30~40cm；As feather cockscomb children
Seedling it is long to 8~10cm when, cut off the terminal bud of feather cockscomb seedling；When paniculate rockcress seed seedling it is long to 5~12cm when, cut off paniculate rockcress seed children
The terminal bud of seedling；The cadmium manganese chromium in contaminated soil is absorbed by the root system of feather cockscomb and paniculate rockcress seed；
(3) when feather cockscomb grows to the maturity period, apply composite soil modifier, composite earth to cadmium manganese chromium combined contamination soil
The applied amount of earth modifying agent is the 4% of cadmium manganese chromium combined contamination soil quality, and the composite soil modifier includes alkyl glycosides
With aspartic acid diethoxy succinic acid, the mass ratio of the alkyl glycosides and aspartic acid diethoxy succinic acid is 1:1.5；
(4) when feather cockscomb grows to floor portion biomass maximum, feather cockscomb above-ground organs are removed from contaminated soil, is carried out
Harmless treatment；When paniculate rockcress seed grows to floor portion biomass maximum, by paniculate rockcress seed above-ground organs from contaminated soil
It removes, carries out harmless treatment；
(5) it after feather cockscomb and paniculate rockcress seed gather in, digs again, the operation of step (1) to (4) is repeated, by 15 times
After continuous plantation and harvest, the active cadmium manganese chromium in soil is remarkably decreased.
Comparative example 1
The plant restoration method of the improvement cadmium manganese chromium combined contamination soil of this comparative example is substantially the same manner as Example 2, different
Place is that this comparative example only plants feather cockscomb.
Comparative example 2
The plant restoration method of the improvement cadmium manganese chromium combined contamination soil of this comparative example is substantially the same manner as Example 2, different
Place is that this comparative example only plants paniculate rockcress seed.
Growth period is selected to be gathered in for the feather cockscomb and paniculate rockcress seed of 50d respectively, the plant after harvest is divided into root, stem, leaf
5mmolL-1Ca (NO is first used in three parts, root3)2Solution impregnates 15min, after ultrasonic washing instrument cleans 10min, then spends
Ionized water rinses 3 times.Stem and leaf are directly cleaned 3 times with deionized water.Clean sample is in 105 DEG C of water-removing 30min, 60 DEG C of drying
To constant weight, plant is taken out, measures leaf portion, the dry weight of stem and root, is crushed, 5mm sieve is crossed.The sample HNO of crushing3+
HClO4After (9:1) resolution, Cd, Mn, Cr content are measured using Atomic Absorption Spectrometer (PE-AA700).Plant sample resolution and
Quality control is carried out using national standard reference material (GBW10015 (GSB-6)) with parallel full blank sample, to guarantee result
Accurately, recovery of standard addition control is 95%~105%.
The feather cockscomb and paniculate rockcress seed of embodiment 1 and embodiment 2 grow 50 days numbers of blade as shown in Figure 1, root dry weight such as Fig. 2
Shown, stem weight is as shown in figure 3, leaf dry weight is as shown in Figure 4.
The feather cockscomb of embodiment 1 and embodiment 2 grow 50 days root, stem, leaf cadmium content the results are shown in Table 1.
Table 1
The paniculate rockcress seed of embodiment 1 and embodiment 2 grow 50 days root, stem, leaf cadmium content the results are shown in Table 2.
Table 2
By embodiment 1 and embodiment 2 the result shows that, feather cockscomb and paniculate rockcress seed top can be effectively relieved by abolishing apical dominance
The inhibiting effect that bud grows lateral bud promotes plant growth, increases plant growth amount, dramatically increases feather cockscomb and paniculate rockcress seed blade
In content of beary metal, effectively improve heavy-metal contaminated soil effect of plant restoration, and easy to operate, it is economical, it is pollution-free.
Alkyl glycosides is a kind of nonionic surface active agent of green, and aspartic acid diethoxy succinic acid is degradability
Chelating agent, the two compounding, can be used as the modifying agent for strengthening feather cockscomb and paniculate rockcress seed remediating heavy metal.By the result of embodiment 2~4
Show that feather cockscomb and paniculate rockcress seed can be strengthened to cadmium manganese by regulating and controlling alkyl glycosides and the mass ratio of aspartic acid diethoxy succinic acid
The assimilation effect of chromium improves the remediation efficiency of cadmium manganese chromium combined contamination soil.
It measures embodiment 2~7 and comparative example 1~2 is implemented to repair the average content of the cadmium of the soil of front and back, manganese, chromium, as a result
As shown in table 3.
Table 3
The above result shows that using super enriching plant feather cockscomb and paniculate rockcress seed in a manner of work, plantation is multiple to cadmium manganese chromium
It closes in contaminated soil, there is good absorption and concentration effect to the cadmium manganese chromium in contaminated soil, remediation efficiency is higher.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than protects to the present invention
The limitation of range is protected, although the invention is described in detail with reference to the preferred embodiments, those skilled in the art should
Understand, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the essence of technical solution of the present invention
And range.
Claims (10)
1. a kind of plant restoration method for administering cadmium manganese chromium combined contamination soil, which comprises the following steps:
(1) biomass carbon is added in cadmium manganese chromium combined contamination soil, the applied amount of biomass carbon is cadmium manganese chromium combined pollution soil
The 3%~6% of loamy texture amount；
(2) feather cockscomb seedling and paniculate rockcress seed seedling are planted into cadmium manganese chromium combined contamination soil in a manner of work, is passed through blueness
The root system of feather cockscomb and paniculate rockcress seed absorbs the cadmium manganese chromium in contaminated soil；
(3) when feather cockscomb grows to the maturity period, apply composite soil modifier to cadmium manganese chromium combined contamination soil, composite soil changes
Good dose of applied amount is the 3%~4.5% of cadmium manganese chromium combined contamination soil quality, and the composite soil modifier includes alkyl sugar
Glycosides and aspartic acid diethoxy succinic acid；
(4) when feather cockscomb grows to floor portion biomass maximum, feather cockscomb above-ground organs are removed from contaminated soil, is carried out harmless
Change processing；When paniculate rockcress seed grows to floor portion biomass maximum, paniculate rockcress seed above-ground organs are removed from contaminated soil,
Carry out harmless treatment；
(5) it after feather cockscomb and paniculate rockcress seed gather in, digs again, the operation of step (1) to (4) is repeated, by 10~15 times
After continuous plantation and harvest, the active cadmium manganese chromium in soil is remarkably decreased.
2. the plant restoration method according to claim 1 for administering cadmium manganese chromium combined contamination soil, which is characterized in that described
In step (2), make 1 row feather cockscomb between 1~2 row paniculate rockcress seed of plantation.
3. the plant restoration method according to claim 1 for administering cadmium manganese chromium combined contamination soil, which is characterized in that described
In step (2), when feather cockscomb seedling it is long to 8~10cm when, cut off the terminal bud of feather cockscomb seedling.
4. the plant restoration method according to claim 1 for administering cadmium manganese chromium combined contamination soil, which is characterized in that described
In step (2), when paniculate rockcress seed seedling it is long to 5~12cm when, cut off the terminal bud of paniculate rockcress seed seedling.
5. the plant restoration method according to claim 1 for administering cadmium manganese chromium combined contamination soil, which is characterized in that described
The mass ratio of alkyl glycosides and aspartic acid diethoxy succinic acid is 1:1~2.5.
6. the plant restoration method according to claim 5 for administering cadmium manganese chromium combined contamination soil, which is characterized in that described
The mass ratio of alkyl glycosides and aspartic acid diethoxy succinic acid is 1:1.5.
7. the plant restoration method according to claim 1 for administering cadmium manganese chromium combined contamination soil, which is characterized in that described
The raw material of biomass carbon is pine bark and peanut shell.
8. the plant restoration method according to claim 7 for administering cadmium manganese chromium combined contamination soil, which is characterized in that described
2~5:1 of mass ratio of pine bark and peanut shell.
9. the plant restoration method according to claim 1 for administering cadmium manganese chromium combined contamination soil, which is characterized in that described
Harmless treatment includes innoxious landfill after burning and compressing.
10. feather cockscomb and paniculate rockcress seed are in the application administered in cadmium manganese chromium combined contamination soil.
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