CN106238450A - The method utilizing the restoring cadmium polluted agricultural land soil of Radix Notoginseng Herba hylotelephii erythrosticti - Google Patents
The method utilizing the restoring cadmium polluted agricultural land soil of Radix Notoginseng Herba hylotelephii erythrosticti Download PDFInfo
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- CN106238450A CN106238450A CN201610798044.2A CN201610798044A CN106238450A CN 106238450 A CN106238450 A CN 106238450A CN 201610798044 A CN201610798044 A CN 201610798044A CN 106238450 A CN106238450 A CN 106238450A
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- radix notoginseng
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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
- B09C2101/00—In situ
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Abstract
The invention discloses a kind of method utilizing the restoring cadmium polluted agricultural land soil of Radix Notoginseng Herba hylotelephii erythrosticti, including step: (1) plants Radix Notoginseng Herba hylotelephii erythrosticti in Cd-polluted farmland soil；(2) cradle and remove the ground plant part of Radix Notoginseng Herba hylotelephii erythrosticti,.The method utilizing the restoring cadmium polluted agricultural land soil of Radix Notoginseng Herba hylotelephii erythrosticti that the present invention proposes, in agricultural land soil by cadmium pollution that Radix Notoginseng Herba hylotelephii erythrosticti is planted to, Radix Notoginseng Herba hylotelephii erythrosticti is quick survival and growth in soil, utilize its accumulation ability to heavy metal in soil cadmium, by the cadmium in Root Absorption contaminated soil the aerial parts that is transferred to plant, to reach to reduce the content of heavy metal in soil cadmium, the purpose of restoring cadmium polluted agricultural land soil.
Description
Technical field
The invention belongs to technical field of environment pollution control, be specifically related to the phytoremediation that a kind of heavy metal in soil pollutes
Technology, especially with regard to a kind of method utilizing the restoring cadmium polluted agricultural land soil of Radix Notoginseng Herba hylotelephii erythrosticti.
Background technology
Soil is the natural environment depended on for existence of the mankind and the valuable source of agricultural production, and soil environment is healthy concerning agricultural production
Quality and health.In recent years, heavy metal pollution of soil has become the serious environmental problem that the whole world faces.At present, I
State's agricultural land soil is serious by heavy metal pollution, shows according to First National Soil Pollution Investigation result, China's arable soil
Point position exceeding standard rate is 19.4%, the most slightly, slightly, moderate and serious pollution point position ratio be respectively 13.7%, 2.8%,
1.8% and 1.1%；And from the point of view of pollutant exceed standard situation, heavy metal cadmium point position exceeding standard rate is 7.0%.China is by a huge sum of money now
Belong to the agricultural land soil about 25,000,000 hectares polluted, up to 12,000,000 tons of the most contaminated by heavy metals grain, the direct warp caused
Ji loss is more than 10,000,000,000 yuan.
Traditional administration way of cadmium pollution soil mainly has engineering control measure and physical chemistry restorative procedure, peripheral doses
Technology mainly carrys out rehabilitating soil by the method for improving the soil, Vitrification, electric driving method and thermal desorption method etc.；Chemical remediation technology mainly includes
Chemical curing method, chemical leaching method etc., but it often has with high costs, big to environmental perturbation and is likely to result in secondary pollution etc.
Drawback.In recent years, utilize phytoremediation technology to administer heavy metal pollution of soil in situ and be increasingly becoming main flow, plant in this area
The advantages such as recovery technique has that rehabilitation cost is relatively low, little to environmental perturbation, non-secondary pollution and sustainability, have concurrently simultaneously and beautify
The effect of environment, these advantages are not available for engineering control measure and physical chemistry restorative procedure.
In phytoremediation technology, the heavy metal utilizing super enriching plant to absorb in contaminated soil is relatively conventional skill
Art, but the super enriching plant having now been found that generally has soil climate adapts to ability, poor growth, Biomass are little etc. asks
Topic, limits its remediation efficiency and application value, becomes the bottleneck urgently broken through in phytoremediation technology.Therefore, seek
Plant adaptable, that Biomass is big, growth cycle is short, heavy metal accumulation ability is strong, remediation efficiency is high, and research and develop
Supporting recovery technique becomes the research emphasis of this area.
Summary of the invention
In view of this, it is an object of the invention to provide a kind of method utilizing the restoring cadmium polluted agricultural land soil of Radix Notoginseng Herba hylotelephii erythrosticti,
To solving at least one technical problem present in above-mentioned prior art.
For achieving the above object, the present invention provides a kind of method utilizing the restoring cadmium polluted agricultural land soil of Radix Notoginseng Herba hylotelephii erythrosticti, bag
Include step:
(1) plant in Cd-polluted farmland soil Radix Notoginseng Herba hylotelephii erythrosticti；
(2) cradle and remove the ground plant part of Radix Notoginseng Herba hylotelephii erythrosticti,.
In the present invention, described Radix Notoginseng Herba hylotelephii erythrosticti, it is Crassulaceae sengreen, and for perennial meat draft, mountain is born in happiness
On the rock of slope or in thick grass, also referred to as Herba sedi kamtschatici (Sedum aizoon L.).
Described Cd-polluted farmland soil refers to that, by the agricultural land soil of cadmium pollution, wherein the concentration of cadmium is the general water of this area
Flat, generally between 0.6～2.0mg/kg, also there is indivedual place polluting especially severe, it is left that its concentration may be up to 100mg/kg
Right.In the preferred agricultural land soil of the present invention, the concentration of cadmium is 1～2mg/kg, is capable of more preferably removing in the range of this is preferred
Repairing effect.
In step (1), described in the method planted be that this area is conventional, as planting seed, root division, cuttage are planted,
Preferably cuttage is planted.
In step (1), described in plant preferably by distance between rows and hills 30 × 15cm dig cave sit water plant, the depth of planting is 5cm, earthing
After tread.Wherein, digging cave and sitting water and plant is the conventional term in this area, and it is a kind of comparison drought resisting planting skill remote that spreads
Art, applies as far back as Arid Regions of Northern, can help to spend period of drought, be timely completed the operation of planting of sowing season.
In step (1), after Radix Notoginseng Herba hylotelephii erythrosticti of planting, it is preferable that also impose citric acid (CA) in Cd-polluted farmland soil
Solution, the amount of application of described citric acid solution more preferably 1mmol/kg soil.
In step (2), described in cradle as the conventional operation in this area.Preferably, treat that Radix Notoginseng Herba hylotelephii erythrosticti plant part on the ground is raw
Long cradle described in carrying out during 30-50cm, and remove and cradle the ground plant part obtained,.
It is highly preferred that retain Radix Notoginseng Herba hylotelephii erythrosticti plant part 4-5cm on the ground when cradling.
It will be appreciated by those skilled in the art that in step (2), after to Radix Notoginseng Herba hylotelephii erythrosticti, plant part cradles on the ground,
By the growth rhythm of plant, plant part can be with continued growth on the ground for Radix Notoginseng Herba hylotelephii erythrosticti, can be again in time regrowing to 30-50cm
Secondary cradling, therefore, step (2) can be the operation that a circulation is carried out.
Preferably, present invention additionally comprises step (3): the Radix Notoginseng Herba hylotelephii erythrosticti plant cradling results is carried out harmless treatment.Excellent
Selection of land, described harmless treatment is for burning or making innoxious landfill after compression.
Therefore, the operation that the present invention is general is, will cradle the Radix Notoginseng Herba hylotelephii erythrosticti plant part on the ground of results from by cadmium pollution
Remove on agricultural land soil, to remove the cadmium in contaminated soil；And Radix Notoginseng Herba hylotelephii erythrosticti remainder can continued growth being continued by root system
Continue the cadmium absorbed in soil and transfer them to the aerial parts of plant, when the aerial parts of plant regrows 30-50cm
Shi Jinhang cradles again, the cadmium content in sustainable reduction soil.The Radix Notoginseng Herba hylotelephii erythrosticti of results plant part on the ground, can be sent
Concentrate to exclusive place and do harmless treatment.
Present invention achieves following beneficial effect:
The method utilizing the restoring cadmium polluted agricultural land soil of Radix Notoginseng Herba hylotelephii erythrosticti that the present invention proposes, by planting Radix Notoginseng Herba hylotelephii erythrosticti
In the agricultural land soil of cadmium pollution, Radix Notoginseng Herba hylotelephii erythrosticti is quick survival and growth in soil, utilizes its enrichment to heavy metal in soil cadmium
Ability, by the cadmium in Root Absorption contaminated soil the aerial parts that is transferred to plant, to reach to reduce heavy metal in soil
The content of cadmium, the purpose of restoring cadmium polluted agricultural land soil.
Radix Notoginseng Herba hylotelephii erythrosticti used in technical solution of the present invention has drought-enduring, cold-resistant, barren-resistant, adaptable, growth soon
The characteristics such as speed, Biomass are big, and heavy metal in soil cadmium is had stronger accumulation ability, utilize Radix Notoginseng Herba hylotelephii erythrosticti restoring cadmium polluted
Agricultural land soil also has that input cost is low, extensive management, winter can prevent the features such as soil bareness, simultaneously because pattern is gorgeous,
Florescence is longer, has preferable ornamental value and an economic benefit, therefore the having a extensive future of its reparative potential and popularization and application.
Accompanying drawing explanation
Fig. 1 is that the present invention utilizes Radix Notoginseng Herba hylotelephii erythrosticti to administer the schematic flow sheet of Cd-polluted farmland soil remediation method；
Fig. 2 be Henan moderate Cd-polluted farmland Cadmium in Soil content and plantation 60 days after Radix Notoginseng Herba hylotelephii erythrosticti overground part cadmium contain
Amount；
Fig. 3 be the slight Cd-polluted farmland in Guangxi Cadmium in Soil content and plantation 60 days after Radix Notoginseng Herba hylotelephii erythrosticti overground part cadmium contain
Amount；
Fig. 4 be heavy Cd contamination farmland, Yunnan Cadmium in Soil content and plantation 60 days after Radix Notoginseng Herba hylotelephii erythrosticti overground part cadmium contain
Amount；
Fig. 5 is with Henan moderate Cd-polluted farmland soil as experimental subject, and plantation Radix Notoginseng Herba hylotelephii erythrosticti is also aided with and uses citric acid
The cadmium content ratio of the experimental group (CA group) of solution and only the ground plant part of the matched group (CK group) of plantation Radix Notoginseng Herba hylotelephii erythrosticti plant
Relatively scheme.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in further detail.
In view of the technical problem described in background section, it is necessary to screening one is adaptable, Biomass big, life
The plant that long period is short and heavy metal accumulation ability is strong, this not only contributes to the repairing and treating of Cd-polluted farmland soil, simultaneously
Be conducive to improving phytoremediation efficiency, reduce and repair the time limit, make farmland resource return normal use as early as possible.
Inventor finds after having carried out substantial amounts of experimental exploring, uses Radix Notoginseng Herba hylotelephii erythrosticti can reach preferably to repair effect
Really, simultaneously during constantly practice, the most surprisingly finding, if being aided with certain ancillary method again, being up to more manage
The effect thought.
Radix Notoginseng Herba hylotelephii erythrosticti is Crassulaceae, Sedum perennial meat herbaceous plant, and root stock is short, and thick stem height 20-50cm has 1-
Article 3, stem, uprightly, without hair, not branch.Leaf alternate, narrow lanceolar, ellipticity lanceolar to ovum shape fall lanceolar, long 3.5-8cm,
Wide 1.2-2cm, tip is tapering, base portion wedge shape, and there is irregular sawtooth at edge；Leaf is solid, nearly keratin.Cyme is spent more,
Horizontal branch, open and flat, pattern is yellow, beautiful in colour.
Radix Notoginseng Herba hylotelephii erythrosticti strong adaptability, does not select soil, weather, and all parts of the country all can be planted, and the most alive, manageability.Typically adopt
Using plant division cottage propagation, spring and summer is the most alive with early autumn and booth cuttage in winter, and survival rate is up to 99%.Field planting then, has a good harvest then,
Next year just enters the phase of abounding with.Field planting, can gather in the crops 20 years fresh stem and leaf continuously, with cutting with length, underground block just as Folium Allii tuberosi
Root is rare Chinese crude drug.
Additionally, because of had drought-enduring, cold-resistant, barren-resistant, adaptable of Radix Notoginseng Herba hylotelephii erythrosticti and growth quickly so that it is can
Cultivating in region the most widely, low level management then makes it easier to promote.And substantial amounts of Biomass, repeatedly cradle, constant absorption
Heavy metal cadmium in soil, cadmium pollution soil repair that can be more efficient.Radix Notoginseng Herba hylotelephii erythrosticti is as ornamental plant simultaneously, is often used as
Flower bed is built and cover plant, makes Cd-polluted farmland in the period utilizing Radix Notoginseng Herba hylotelephii erythrosticti to repair, it is also possible to produce certain economy
It is worth.Therefore, Radix Notoginseng Herba hylotelephii erythrosticti has broad application prospects as the phytoremediation of cadmium pollution soil.
Specifically, refer to shown in Fig. 1, the present invention utilize the method for the restoring cadmium polluted agricultural land soil of Radix Notoginseng Herba hylotelephii erythrosticti include as
Lower step:
S1: in Qing Ming Day i.e. the beginning of April, Radix Notoginseng Herba hylotelephii erythrosticti maternal plant is dug out root, how many by radical bud, if being cut into
Dry strain, more than 2 radical buds of every strain band, then to dig cave seat water by distance between rows and hills 30 × 15cm and plant, planting depth is 5cm, after earthing
Tread.
S2: Radix Notoginseng Herba hylotelephii erythrosticti is by the cadmium in Root Absorption soil and is transferred to overground part, treats that its plant height reaches 30-50cm
Time, cradling at overground part 4-5cm, the aerial parts of results performs the operation of step S4.
S3: after step S2 cradles, residue aerial parts may proceed to growth the cadmium that absorbs in soil, and vice-minister is extremely again to treat it
During about 30-50cm, carrying out second time according to the method for step S2 and cradle, the aerial parts of results performs the operation of step S4.
S4: the Radix Notoginseng Herba hylotelephii erythrosticti aerial parts gathered in the crops is delivered to exclusive place concentration and does harmless treatment.
Below by way of instantiation, the present invention will be further described.
Embodiment 1
The present embodiment uses potted plant simulation experiment method, chooses Henan moderate Cd-polluted farmland (HN), Guangxi is slight cadmium dirty
Dye farmland (GX) and three kinds of heavy Cd contamination farmland, Yunnan (YN) 0-20cm topsoil soils, by its natural air drying, smash to pieces, reject miscellaneous
Thing, crosses 5mm sieve, first measures the content of its heavy metal in soil cadmium.Then weigh 1kg soil and load diameter with high respectively
In the plastic tub of 19cm × 16cm, add water and irrigate.Seedling maternal plant high for 10cm is divided into 3 buds according to natural texture and is transplanted to plastics
In basin, according to hydropenia situation, irregularly water, it is ensured that ground moistening but not accumulated water.Every kind of soil sets 3 repetitions.
Henan moderate Cd-polluted farmland (HN), Guangxi is slight Cd-polluted farmland (GX) and heavy Cd contamination farmland, Yunnan (YN)
After the bimester of soil plantation, plant height has been grown to 30-50cm high, cradles (plant 4-5cm on reservation when cradling) results aerial parts,
Rinse, dry and pulverized 100 mesh well with deionized water.Plant sample nitric acid perchloric acid resolution method is cleared up, and uses stone
Ink stove AAS method measures cadmium content.
Fig. 2 is Radix Notoginseng Herba hylotelephii erythrosticti plant part on the ground after the Cadmium in Soil content of Henan moderate Cd-polluted farmland and plantation 60 days
Cadmium content, as shown in Figure 2, the content of Henan moderate Cd-polluted farmland Cadmium in Soil is 1.95mg/kg, Radix Notoginseng after planting 60 days
The cadmium content of Herba hylotelephii erythrosticti overground part reaches 33.12mg/kg.
Fig. 3 is Radix Notoginseng Herba hylotelephii erythrosticti plant part on the ground after the Cadmium in Soil content of the slight Cd-polluted farmland in Guangxi and plantation 60 days
Cadmium content, from the figure 3, it may be seen that the content of Guangxi slight Cd-polluted farmland Cadmium in Soil is 1.06mg/kg, Radix Notoginseng after planting 60 days
The cadmium content of Herba hylotelephii erythrosticti overground part reaches 2.70mg/kg.
Fig. 4 be heavy Cd contamination farmland, Yunnan Cadmium in Soil content and plantation 60 days after Radix Notoginseng Herba hylotelephii erythrosticti overground part cadmium contain
Amount, in the heavy Cd contamination agricultural land soil of Yunnan, the content of cadmium is 97.97mg/kg, the cadmium of Radix Notoginseng Herba hylotelephii erythrosticti overground part after planting 60 days
Content reaches 85.08mg/kg.
Meanwhile, the present embodiment characterizes Radix Notoginseng Herba hylotelephii erythrosticti to the richness of cadmium in different cadmium pollution soils by heavy metal accumulation coefficient
Collection ability.Bio-concentration factor, also known as living being concentration ratio (Bio-concentration Factor, BCF), it can reflect
The plant enrichment characteristics to heavy metal in soil, concentration coefficient is one of standard judging super enriching plant more than 1, and heavy metal is rich
Collection coefficient can be calculated by below equation:
Heavy metal accumulation coefficient=plant in-vivo heavy metal content/heavy metal in soil content
Calculating and understand, after planting 60 days in the soil of Henan moderate Cd-polluted farmland, Radix Notoginseng Herba hylotelephii erythrosticti concentration coefficient is
16.98；After planting 60 days in the soil of the slight Cd-polluted farmland in Guangxi, Radix Notoginseng Herba hylotelephii erythrosticti concentration coefficient is 2.55；At Yunnan weight
After planting 60 days in the soil of degree Cd-polluted farmland, Radix Notoginseng Herba hylotelephii erythrosticti concentration coefficient is 0.87.
Above example illustrates, Radix Notoginseng Herba hylotelephii erythrosticti concentration coefficient in the moderate Cd-polluted farmland soil of Henan is the highest, at cloud
In south heavy degree Cd-polluted farmland soil, overground part absorbs the content maximum of cadmium, and it is rich in the slight Cd-polluted farmland soil of Guangxi
Collection coefficient have also exceeded 1, shows stronger accumulation ability and preferable repairing effect.
Embodiment 2
The same manner as in Example 1ly, the present embodiment is also adopted by potted plant simulation experiment method, and all operations is all with embodiment 1,
The difference is that only, after Radix Notoginseng Herba hylotelephii erythrosticti of planting, in the growth course of plant, also in Cd-polluted farmland soil, impose lemon
Lemon acid (CA) solution, amount of application is 1mmol/kg soil.
When plant to be planted plant height length is to 30-50cm height, cradle (plant 4-5cm on reservation when cradling) results aerial parts,
Rinse, dry and pulverized 100 mesh well with deionized water.Plant sample nitric acid perchloric acid resolution method is cleared up, and uses stone
Ink stove AAS method measures the cadmium content in plant.Result shows, imposes citric acid solution if coordinated, additionally it is possible to increase substantially
The Radix Notoginseng Herba hylotelephii erythrosticti accumulation ability to cadmium, specifically refers to Fig. 5 and (only illustrates Henan moderate Cd-polluted farmland soil, Yunnan weight in figure
The concrete data of degree and Guangxi slight Cd-polluted farmland soil are not shown).Fig. 5 shows with the Henan moderate cadmium in embodiment 1 dirty
Dye agricultural land soil is experimental subject, and plantation Radix Notoginseng Herba hylotelephii erythrosticti is also aided with and uses the experimental group (CA group) of citric acid solution and only plant three
The cadmium content comparison diagram of the ground plant part of the matched group (CK group) of seven Herba hylotelephii erythrosticti plant, from figure 5 it can be seen that CA group compares CK
The cadmium content that group is adsorbed to exceed 27.8%, and this result shows, after using citric acid solution, can significantly improve Radix Notoginseng scape
It absorption efficiency to cadmium.
Particular embodiments described above, has been carried out the purpose of the present invention, technical scheme and beneficial effect the most in detail
Describe in detail bright it should be understood that the foregoing is only the specific embodiment of the present invention, be not limited to the present invention, all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. the method utilizing the restoring cadmium polluted agricultural land soil of Radix Notoginseng Herba hylotelephii erythrosticti, it is characterised in that include step:
(1) plant in Cd-polluted farmland soil Radix Notoginseng Herba hylotelephii erythrosticti；
(2) cradle and remove the ground plant part of Radix Notoginseng Herba hylotelephii erythrosticti,.
Method the most according to claim 1, it is characterised in that the concentration of described Cd-polluted farmland Cadmium in Soil be 1～
2mg/kg。
Method the most according to claim 1, it is characterised in that in step (1), described in the method planted be that cuttage is planted.
Method the most according to claim 1, it is characterised in that in step (1), described in plant and dig by distance between rows and hills 30 × 15cm
Cave is sat water and is planted, and the depth of planting is 5cm, treads after earthing.
Method the most according to claim 1, it is characterised in that in step (1), after Radix Notoginseng Herba hylotelephii erythrosticti of planting, also dirty to cadmium
Dye agricultural land soil imposes citric acid solution.
Method the most according to claim 5, it is characterised in that in step (1), the amount of application of described citric acid solution is
1mmol/kg soil.
Method the most according to claim 1, it is characterised in that in step (2), treats the plant part growth on the ground of Radix Notoginseng Herba hylotelephii erythrosticti
Cradle described in carrying out during 30-50cm.
Method the most according to claim 1, it is characterised in that in step (2), retains Radix Notoginseng Herba hylotelephii erythrosticti and plants on the ground when cradling
Strain part 4-5cm.
Method the most according to claim 1, it is characterised in that also include step (3): the Radix Notoginseng Herba hylotelephii erythrosticti cradling results is planted
Strain carries out harmless treatment.
Method the most according to claim 9, it is characterised in that described harmless treatment is for burning or making harmless after compression
Change landfill.
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| CN109746255A (en) * | 2019-03-19 | 2019-05-14 | 东南大学 | A kind of method of activator joint Phytoremediation of Soils Contaminated by Heavy Metals |
| CN110743908A (en) * | 2019-11-26 | 2020-02-04 | 西北师范大学 | Method for restoring cadmium-polluted soil by using sedum alfredii hance, soil dressing method and low-absorption corn |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107876551A (en) * | 2017-08-24 | 2018-04-06 | 中国科学院地理科学与资源研究所 | Eight treasures (choice ingredients of certain special dishes) red-spotted stonecrop repairs method, activator and the application of cadmium and/or lead-contaminated soil |
| CN109746255A (en) * | 2019-03-19 | 2019-05-14 | 东南大学 | A kind of method of activator joint Phytoremediation of Soils Contaminated by Heavy Metals |
| CN110743908A (en) * | 2019-11-26 | 2020-02-04 | 西北师范大学 | Method for restoring cadmium-polluted soil by using sedum alfredii hance, soil dressing method and low-absorption corn |
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Application publication date: 20161221 |
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