CN106903157A - A kind of plant extract restorative procedure of the calcareous agricultural land soil of heavy metal cadmium - Google Patents
A kind of plant extract restorative procedure of the calcareous agricultural land soil of heavy metal cadmium Download PDFInfo
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- CN106903157A CN106903157A CN201710120964.3A CN201710120964A CN106903157A CN 106903157 A CN106903157 A CN 106903157A CN 201710120964 A CN201710120964 A CN 201710120964A CN 106903157 A CN106903157 A CN 106903157A
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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
- B09C1/08—Reclamation of contaminated soil chemically
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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 plant extract restorative procedure of the calcareous agricultural land soil of heavy metal cadmium in the phytoremediation technology field of contaminated soil, the plant extract restorative procedure of the calcareous agricultural land soil of the heavy metal cadmium is comprised the following steps that：S1：Choose concentration coefficient and the transhipment standard compliant hyperaccumulative plant of coefficient is planted in the calcareous soil of heavy metal cadmium；S2：Chelating agent is added to improve the biological effectiveness of heavy metal；S3：The upgrowth situation of routine observation plant；S4：To the content of the crome metal of plant sampling analysis its diverse location; the invention belongs to based technique for in-situ remediation; disturbance to environment is small; landscape ecological will not be destroyed; can greening environment, it is simple to operate, had broad application prospects in environmental protection; the present invention soil fertility and ecologic structure will not be destroyed during soil remediation, without carrying out after-treatment can plantation other crops.
Description
Technical field
The present invention relates to the phytoremediation technology field of contaminated soil, specially a kind of calcareous farmland soil of heavy metal cadmium
The plant extract restorative procedure of earth.
Background technology
Cadmium is a kind of dangerous environmental pollution element, when cadmium enters plant and accumulates to a certain extent, will produce poison
Evil symptom, shows growth is suppressed, plant is short and small, chlorosis, yield decline etc..Its influence to plant includes two sides
Face：One influences it to grow and yield, such as makes rate of photosynthisis reduction chlorophyll content of the paddy rice in physiological and biochemical procedure
Decline causes chlorosis, and tiller of turning green is postponed, and root system is short of；Secondly influence quality, shows that the cadmium content in crop can with soil
, up to 0.997, this not only makes rice for the notable positive correlation of solvent cadmium content poling, such as coefficient correlation of rice cadmium and soil soluble state cadmium
Harmful components increase, and have an effect on the amylopectin in the amino acid and starch of rice and amylose ratio and change, make
Its quality variation.
If the excessive cadmium of intake in human body, the enzyme system and the chemical reaction by zinc for needing zinc are interfered with, caused
The generation of various diseases, the excessive cadmium of intake in human body, then combination that can be strong with the phosphorus in human body, so as to by sclerotin calcium phosphate
In calcium eject to enter urine, make its urinary calcium content increase, in human body the excessive emissions of calcium can make osteoporosis soften, become
Shape, pain and fracture.The heavy metal pollution major project of current soil is administered with chemical harnessing to be improved, and wherein engineering is controlled
Reason method refers to that the heavy metal pollution of soil is administered using physics or physicochemical principle, and the method for physics mainly has visitor
Soil, soil removal and replacement, table soil and deep ploughing is gone the measure such as to dig, heavy metal pollution of soil is directed to add substantial amounts of clean soil in contaminated soil, and covers
Cover well mixed on top layer, pollutant concentration is reduced to below harm concentration or reduce contact of the pollutant with root system of plant,
Mitigate the purpose of harm so as to reach；Soil replacement method is exactly that contaminated soil is taken away, changes to new, clean soil, this side
Method is brighter to the regulation effect compared with small area, severe contamination and pollutant with radioactivity or the easily soil that diffusion, hardly possible are decomposed
It is aobvious；Rule of digging is to plough deeply soil, the pollutant for being gathered in top layer is distributed to deeper level, reaches the mesh of dilution pollutant
, the method is applied to the deeper soil of soil layer, and to coordinate increase dose, to make up the damage of topsoil soils nutrients loss
Lose；And chemical harnessing method is exactly organic matter, the cation exchange capacity for increasing soil to input modifying agent, inhibitor in soil
With the content of clay, make the composition situation of its acid-base property, redox of soil condition or soil intermediate ion that change soil, and then
The suction-operated of heavy metal, redox, antagonism or precipitation produce influence, the final pollution for reducing heavy metal,
But these administering method early stage control expenses are larger, and the DeGrain administered, therefore, we have proposed a heavy metal species
The plant extract restorative procedure of the calcareous agricultural land soil of cadmium pollution solves the pollution of cadmium in agricultural land soil.
The content of the invention
It is an object of the invention to provide a kind of plant extract restorative procedure of the calcareous agricultural land soil of heavy metal cadmium, with
Solve the problems, such as to be proposed in above-mentioned background technology.
To achieve the above object, the present invention provides following technical scheme：A kind of calcareous agricultural land soil of heavy metal cadmium
Plant extract restorative procedure, the plant extract restorative procedure of the calcareous agricultural land soil of the heavy metal cadmium is comprised the following steps that：
S1：Choose the calcium soil of concentration coefficient and the standard compliant hyperaccumulative plant of transhipment coefficient in heavy metal cadmium
Planted in earth；
S2：After hyperaccumulative plant is planted, annular pit is dug in its root, and to adding chelating agent inside annular pit
To improve the biological effectiveness of heavy metal, promote absorption of the hyperaccumulative plant to cadmium；
S3：Using outdoor cultivation, the upgrowth situation of routine observation plant, it is indefinite that the water shortage situation according to plant is carried out to it
Phase keeps the skin wet；
S4：After its plant strain growth phase terminates, to the content of the crome metal of plant sampling analysis its diverse location.
Preferably, in the step S1, concentration coefficient=plant in-vivo heavy metal content/heavy metal in soil content turns
Content of beary metal/root content of beary metal in fortune coefficient=cauline leaf.
Preferably, in the step S1, hyperaccumulative plant is that youth-and-old-age or maidenhair or alfalfa or camellia phoenix are celestial.
Preferably, in the step S2, chelating agent is ethylenediamine tetra-acetic acid, citric acid, ethyl pentaacetic acid and second two
Diethylene glycol diethyl ether ethylenediamine tetraacetic acid (EDTA) mixture, wherein ethylenediamine tetra-acetic acid：Citric acid：Ethyl pentaacetic acid：Ethylene glycol diethyl ether
Ethylenediamine tetraacetic acid (EDTA) mixture=0.4:0.9:1:1.3.
Preferably, in the step S4, it is in the analysis method to plant interior metal chromium content：
S41：When plant harvests, point take plant root, stem, the part of leaf three, with water wash off surface soil and other
After pollutant, cleaned with distilled water, 65~70 DEG C of constant temperature are baked to and are completely dried in an oven；
S42：By dried plant sample respectively as in mortar and being ground into powder standby；
S43：Sample is taken out, in moving it to plastic beaker, and the perchloric acid of 0.5ml is added, is heated on electric hot plate and disappeared
Solution, until when solution is close to water white transparency and without oil reservoir, removing sample, cools down and adds the salpeter solution of 4ml6% to dissolve；
S44：Sample is settled in the volumetric flask of 50ml respectively, while blank is done, and in atomic absorption spectrophotometry light
The metal cadmium content in plant is determined on degree meter, when wavelength is 228.8nm.
Compared with prior art, the beneficial effects of the invention are as follows：Improvement with traditional heavy-metal contaminated soil of the invention
Method, the invention belongs to based technique for in-situ remediation, is not required to compared to having the advantages that processing cost is cheap, simple to operate, effect is lasting
Excavate, transport and huge treatment place, the disturbance to environment is small, will not destroy landscape ecological, being capable of greening environment, operation
Simply, had broad application prospects in environmental protection, the present invention will not destroy soil fertility during soil remediation
And ecologic structure, without carrying out after-treatment by plant other crops.
Brief description of the drawings
Fig. 1 is workflow diagram of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1 is referred to, the present invention provides a kind of technical scheme：A kind of plant of the calcareous agricultural land soil of heavy metal cadmium carries
Restorative procedure is taken, the plant extract restorative procedure of the calcareous agricultural land soil of the heavy metal cadmium is comprised the following steps that：
S1：Choose the calcium soil of concentration coefficient and the standard compliant hyperaccumulative plant of transhipment coefficient in heavy metal cadmium
Planted in earth, concentration coefficient=plant in-vivo heavy metal content/heavy metal in soil content, heavy metal in transhipment coefficient=cauline leaf
Content/root content of beary metal, hyperaccumulative plant is that youth-and-old-age or maidenhair or alfalfa or camellia phoenix are celestial；
S2：After hyperaccumulative plant is planted, annular pit is dug in its root, and to adding chelating agent inside annular pit
To improve the biological effectiveness of heavy metal, promote absorption of the hyperaccumulative plant to cadmium, chelating agent is ethylenediamine tetra-acetic acid, lemon
Acid, ethyl pentaacetic acid and ethylene glycol diethyl ether ethylenediamine tetraacetic acid (EDTA) mixture, wherein ethylenediamine tetra-acetic acid：Citric acid：Ethyl
Pentaacetic acid：Ethylene glycol diethyl ether ethylenediamine tetraacetic acid (EDTA) mixture=0.4:0.9:1:1.3；
S3：Using outdoor cultivation, the upgrowth situation of routine observation plant, it is indefinite that the water shortage situation according to plant is carried out to it
Phase keeps the skin wet；
S4：After its plant strain growth phase terminates, to the content of the crome metal of plant sampling analysis its diverse location, to planting
Strain interior metal chromium content analysis method be：
S41：When plant harvests, point take plant root, stem, the part of leaf three, with water wash off surface soil and other
After pollutant, cleaned with distilled water, 65~70 DEG C of constant temperature are baked to and are completely dried in an oven；
S42：By dried plant sample respectively as in mortar and being ground into powder standby；
S43：Sample is taken out, in moving it to plastic beaker, and the perchloric acid of 0.5ml is added, is heated on electric hot plate and disappeared
Solution, until when solution is close to water white transparency and without oil reservoir, removing sample, cools down and adds the salpeter solution of 4ml6% to dissolve；
S44：Sample is settled in the volumetric flask of 50ml respectively, while blank is done, and in atomic absorption spectrophotometry light
The metal cadmium content in plant is determined on degree meter, when wavelength is 228.8nm.The present invention can be by youth-and-old-age, maidenhair, purple
Russian fenugreek herb and camellia phoenix celestial being repeat the above steps and do contrast test, and choosing suitable local hyperaccumulative plant carries out the reparation of soil
Administer, to reach good mass effect.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding can carry out various changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention be defined by the appended.
Claims (5)
1. the plant extract restorative procedure of the calcareous agricultural land soil of a kind of heavy metal cadmium, it is characterised in that：The heavy metal cadmium is dirty
The plant extract restorative procedure for contaminating calcareous agricultural land soil is comprised the following steps that：
S1：Selection concentration coefficient and the standard compliant hyperaccumulative plant of transhipment coefficient are in the calcareous soil of heavy metal cadmium
Plantation；
S2：After hyperaccumulative plant is planted, annular pit is dug in its root, and to adding chelating agent inside annular pit to carry
The biological effectiveness of heavy metal high, promotes absorption of the hyperaccumulative plant to cadmium；
S3：Using outdoor cultivation, the upgrowth situation of routine observation plant, the water shortage situation according to plant carries out irregular to it
Keep the skin wet；
S4：After its plant strain growth phase terminates, to the content of the crome metal of plant sampling analysis its diverse location.
2. the plant extract restorative procedure of the calcareous agricultural land soil of a kind of heavy metal cadmium according to claim 1, it is special
Levy and be：In the step S1, concentration coefficient=plant in-vivo heavy metal content/heavy metal in soil content, transhipment coefficient=
Content of beary metal/root content of beary metal in cauline leaf.
3. the plant extract restorative procedure of the calcareous agricultural land soil of a kind of heavy metal cadmium according to claim 1, it is special
Levy and be：In the step S1, hyperaccumulative plant is that youth-and-old-age or maidenhair or alfalfa or camellia phoenix are celestial.
4. the plant extract restorative procedure of the calcareous agricultural land soil of a kind of heavy metal cadmium according to claim 1, it is special
Levy and be：In the step S2, chelating agent is ethylenediamine tetra-acetic acid, citric acid, ethyl pentaacetic acid and ethylene glycol diethyl ether
Ethylenediamine tetraacetic acid (EDTA) mixture, wherein ethylenediamine tetra-acetic acid：Citric acid：Ethyl pentaacetic acid：Ethylene glycol diethyl ether diamines tetrem
Acid blend=0.4:0.9:1:1.3.
5. the plant extract restorative procedure of the calcareous agricultural land soil of a kind of heavy metal cadmium according to claim 1, it is special
Levy and be：In the step S4, it is in the analysis method to plant interior metal chromium content：
S41：When plant harvests, divide and take plant root, stem, the part of leaf three, soil and other pollutions on surface are washed off with water
After thing, cleaned with distilled water, 65~70 DEG C of constant temperature are baked to and are completely dried in an oven；
S42：By dried plant sample respectively as in mortar and being ground into powder standby；
S43：Sample is taken out, in moving it to plastic beaker, and the perchloric acid of 0.5ml is added, is heated on electric hot plate and cleared up, directly
During to solution close to water white transparency and without oil reservoir, sample is removed, cool down and add the salpeter solution of 4ml6% to dissolve；
S44：Sample is settled in the volumetric flask of 50ml respectively, while blank is done, and in atomic absorption spectrophotometer
On, the metal cadmium content in plant is determined when wavelength is 228.8nm.
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Cited By (7)
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| CN107567871A (en) * | 2017-09-13 | 2018-01-12 | 李智凡 | A kind of modularization cultural method of heavy metal hyperaccumulative plant |
| CN107774705A (en) * | 2017-11-14 | 2018-03-09 | 中国环境科学研究院 | A kind of crop restorative procedure for cutting down agricultural land soil cadmium pollution |
| CN112114113A (en) * | 2020-08-26 | 2020-12-22 | 西藏自治区农牧科学院农业质量标准与检测研究所 | Agricultural product heavy metal risk assessment method based on soil-crop system |
| CN112275795A (en) * | 2020-10-10 | 2021-01-29 | 山东省科学院生态研究所 | Method for remedying heavy metal contaminated soil by combining alfalfa and bacillus |
| CN112404122A (en) * | 2020-10-28 | 2021-02-26 | 武汉市秀谷科技有限公司 | Planting and cultivating method for farmland heavy metal-enriched plants |
| CN114160570A (en) * | 2021-12-08 | 2022-03-11 | 中国农业科学院农田灌溉研究所 | Remediation method for heavy metal cadmium contaminated soil |
| CN115362798A (en) * | 2022-09-07 | 2022-11-22 | 江西省科学院微生物研究所(江西省流域生态研究所) | Plant interplanting planting system and equipment for heavy metal soil improvement |
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| CN107567871A (en) * | 2017-09-13 | 2018-01-12 | 李智凡 | A kind of modularization cultural method of heavy metal hyperaccumulative plant |
| CN107774705A (en) * | 2017-11-14 | 2018-03-09 | 中国环境科学研究院 | A kind of crop restorative procedure for cutting down agricultural land soil cadmium pollution |
| CN112114113A (en) * | 2020-08-26 | 2020-12-22 | 西藏自治区农牧科学院农业质量标准与检测研究所 | Agricultural product heavy metal risk assessment method based on soil-crop system |
| CN112275795A (en) * | 2020-10-10 | 2021-01-29 | 山东省科学院生态研究所 | Method for remedying heavy metal contaminated soil by combining alfalfa and bacillus |
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| CN112404122A (en) * | 2020-10-28 | 2021-02-26 | 武汉市秀谷科技有限公司 | Planting and cultivating method for farmland heavy metal-enriched plants |
| CN114160570A (en) * | 2021-12-08 | 2022-03-11 | 中国农业科学院农田灌溉研究所 | Remediation method for heavy metal cadmium contaminated soil |
| CN115362798A (en) * | 2022-09-07 | 2022-11-22 | 江西省科学院微生物研究所(江西省流域生态研究所) | Plant interplanting planting system and equipment for heavy metal soil improvement |
| CN115362798B (en) * | 2022-09-07 | 2024-03-15 | 江西省科学院微生物研究所(江西省流域生态研究所) | Plant interplanting system and equipment for heavy metal soil improvement |
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Application publication date: 20170630 |