CN110038884A - It is a kind of to improve bluish dogbane to the processing method of heavy metal cadmium remediation efficiency in acid soil - Google Patents
It is a kind of to improve bluish dogbane to the processing method of heavy metal cadmium remediation efficiency in acid soil Download PDFInfo
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- CN110038884A CN110038884A CN201910484567.3A CN201910484567A CN110038884A CN 110038884 A CN110038884 A CN 110038884A CN 201910484567 A CN201910484567 A CN 201910484567A CN 110038884 A CN110038884 A CN 110038884A
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- bluish dogbane
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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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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- Health & Medical Sciences (AREA)
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Abstract
The present invention provides a kind of raising bluish dogbanes to the processing method of heavy metal cadmium remediation efficiency in acid soil, the described method includes: step a, acid soil improvement: in the acid soil of pH value < 6, before arable land, spread fertilizer over the fields lime and organic fertilizer or farmyard manure in soil surface, it is then that Soil tillage is uniform；Step b sprays activator: pressing the bluish dogbane season of growth, in the acid soil that kenaf seeds are sowed to the heavy metal pollution of soil to after turning over, to bluish dogbane normal plants to 2 meter Gao Hou, sprays citric acid solution into bluish dogbane crop root soil.Step c harvests bluish dogbane plant: according to bluish dogbane normal growth periods, bluish dogbane plant being harvested.Effect of the invention is mainly reflected in: under the premise of not influencing bluish dogbane normal growth, being remarkably improved bluish dogbane to the efficiency of heavy metal cadmium reparation in acid soil.
Description
Technical field
The invention belongs to the technical field of biological remediation of heavy metal pollution of soil, and in particular to a kind of raising bluish dogbane is to acidity
The processing method of heavy metal in soil cadmium pollution remediation efficiency.
Background technique
Soil is the means of production necessary to mankind's plant development is lived, continuous development and the mankind with modern industrialization
The lasting development of social activities, the various substances containing heavy metal enter in soil through a variety of ways.It causes a variety of heavy in soil
The enrichment of metal has seriously endangered the safety of soil and the food safety of plantation crops.Heavy metal in soil mainly has
Cadmium (Cd), copper (Cu), lead (Pb), chromium (Cr), mercury (Hg), zinc (Zn) and metalloid arsenic (As) etc..Heavy metal element exists
Have in soil it is relatively stable, the characteristics such as be easy to accumulate and be not easy to remove, and can enter the health that food chain jeopardizes the mankind.
Acid soil is soil general name, including red soil, yellow earth, laterite, red earth etc. of the pH value less than 7.Acid soil
Regional precipitation is abundant, and eluviation is strong, and degree of base saturation is lower, and acidity is higher.Hunan, Hubei, Guangdong, the Guangxi in China etc.
The more acid soils in area.The acid soil of pH value < 6 causes some adverse effects to agricultural production, makes the effective of soil nutrient
Property reduce, the benign development of unfavorable soil, destroy soil texture, the activity of unfavorable edaphon, unfavorable crop growth hair
It educates.
Cadmium is human body non-essential element, and in nature often with the presence of compound state, general content is very low, normal environment
Under state, human health will not influence.After soil environment is by cadmium pollution, cadmium can be enriched in vivo, pass through food chain
Cause slow poisoning into human body.After cadmium is absorbed by the body, cadmium sulfoprotein is formed in vivo, selectively accumulates liver, in kidney.By
Renal tubule is damaged in cadmium, glycosuria, albuminuria and acidaminuria occurs in patient.Especially tool makes the metabolism of bone be obstructed, and causes sclerotin
The a series of symptoms such as loose, atrophy, deformation.
Currently, common heavy metal pollution of soil recovery technique mainly has peripheral doses technology, chemical remediation technology and life
Object recovery technique.Peripheral doses technology and chemical remediation technology are the physically or chemically characteristics using pollutant or pollution medium,
There is short implementation cycle with destruction (such as change chemical property), separation or assimilation pollutant, can be used for handling various pollutants
Advantage.But there is processing cost height, processing engineering disadvantage bigger than normal.Phytoremediation technology belongs to one in bioremediation technology
Kind, compare peripheral doses technology, chemical remediation technology, phytoremediation technology has Ecological Sustainability, highly-safe and will not
The advantages that having a negative impact to soil.Future will become the side of most potential in heavy metal pollution of soil recovery technique and prospect
One of method.
Bluish dogbane, Malvaceae rose of Sharon race plant.Annual herb bast fiber crop.Bluish dogbane stem is upright, 3~5 meters high, slightly
1.5~4.0 centimetres, be in green, purple, red or light red.It is mainly used for the fibrous material production rope made of hemp, gunnysack or other composite materials
Deng not entering food chain, as being applied to phytoremediation technology repairs field for heavy metal pollution of soil, then have only
It obtains thick inherent advantage.Bluish dogbane has certain accumulation ability to soil heavy metal cadmium, but how to improve bluish dogbane in soil
The then rare research of the repairing effect of heavy metal cadmium.
Phytoremediation technology: the plant of plantation super enrichment or a capability enriching heavy metal is absorbed dirty using root system of plant
It contaminates heavy metal in soil and migrates to plant, a kind of method of heavy metal in soil is removed by harvesting plant.Technology benefit
It is that some pairs of heavy metals have the special plant restrained oneself more by force with certain accumulation ability, it is desirable that plant used has biomass
Greatly, the feature attribute that growth is fast and diseases and insect pests resistance is strong, and have and have stronger accumulation ability to various heavy.Plantation is planted
In object repair process, specific chelating agent is added into soil can activate release fixed heavy metal ion in the soil, make
It is dissolved into the soil liquid, to improve plant to the remediation efficiency of heavy metal pollution.
The type of chelating agent has two major class of more carboxyamino acid and natural low molecular weight organic acid, and more carboxyamino acids are such as
EDTA is used more widely since its sequestering power is relatively strong, but since EDTA is that artificial synthesized chelating agent is not easy by soil certainly
So degradation need study tour in terms of environmentally safe influence is widely applied.And natural low molecular weight organic acid such as lemon
The features such as lemon acid, natural attribute make it have easily biological-degradable, and environmental risk is small, can be by forming solubility with metal ion
Complex compound promotes suction-operated of the metal ion to soil particle, to enhance the activity and mobility of metal ion, counterweight
The desorption of metal ion can play facilitation, to improve plant to the remediation efficiency of heavy metal pollution.
Summary of the invention
The object of the present invention is to provide a kind of raising bluish dogbanes to the place of heavy metal cadmium remediation efficiency in acid soil
Reason method reaches and improves its reparation to acid soil heavy metal pollution cadmium under the premise of not influencing bluish dogbane normal plants
The purpose of effect.
For achieving the above object, the present invention uses following technical scheme.
A kind of processing method the present invention provides raising bluish dogbane to heavy metal cadmium remediation efficiency in acid soil, institute
The method of stating includes the following steps.
Step a: acid soil improvement: in the acid soil of pH value < 6, before arable land, lime and organic fertilizer or farmers' are spread fertilizer over the fields
Fertilizer is then uniform by Soil tillage in soil surface.The heavy metal cadmium acid soil is: cadmium content range is in 0.2-
100mg/kg, pH value < 6.
Step b: sprinkling activator: the bluish dogbane season of growth is pressed, kenaf seeds are sowed into the soil heavy metal cadmium to after turning over
In the acid soil of pollution, to bluish dogbane normal plants to 2 meter Gao Hou, it is molten that citric acid is sprayed into bluish dogbane crop root soil
Liquid.
Step c: harvest bluish dogbane plant: according to bluish dogbane normal growth periods, bluish dogbane plant is harvested.
Further, lime is spread fertilizer over the fields in step a base applies 50 ~ double centner per acre, the calcium oxide of lime primary every application in 2 years
Content requirement is 70% or more, and moisture is below 5%.
Further, the depth turned in step a is 20 ~ 30 centimetres.
Further, when spraying citric acid in step b, after bluish dogbane height growth to 2m, branches and leaves are luxuriant, no disease and pests harm.
Further, citric acid solution concentration is 8mmol/L in step b.
Further, citric acid solution sprinkling dosage is 3000ml/ squares in step b.
Compared with prior art, the technical program has the following advantages that.
When bluish dogbane grows into certain altitude in heavy metal cadmium soil in the present invention, citric acid is sprayed into soil
Afterwards, heavy metal in soil cadmium ion is activated, and bluish dogbane largely absorbs heavy metal cadmium from soil, while heavy metal cadmium accumulation being existed
The each position of bluish dogbane plant, to improve the enriching quantity of heavy metal cadmium in bluish dogbane plant.
Citric acid belongs to natural low molecular weight organic acid, and natural attribute makes it have easily biological-degradable, and environmental risk is small
The features such as, under certain conditions, bluish dogbane can be preferably improved to the remediation efficiency of heavy metal pollution cadmium.
After spraying citric acid into soil, bluish dogbane growth is normal, does not influence the biological yield and fiber utilization of bluish dogbane.
Effect of the invention is mainly reflected in:, can be significant under the premise of not influencing bluish dogbane normal growth and fiber utilization
Bluish dogbane is improved to the remediation efficiency of heavy metal pollution of soil cadmium.
Detailed description of the invention
Fig. 1 is influence of the citric acid spray concentration to bluish dogbane heavy metal cadmium enriching quantity.
Fig. 2 is influence of the citric acid spray concentration to bluish dogbane biomass.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.
Embodiment.
The heavy metal cadmium acid soil base that need to be repaired is located at zhuzhou, hunan province Li- ling city Zuoquan, the village Hua Qiao, town, soil
Sampling depth is 10-20cm, and after measured, the ground soil physico-chemical property is as follows: pH value 5.1, content of organic matter 38.6g/kg, cadmium
0.31mg/kg, the present embodiment Demonstration Base uses bluish dogbane conventional agriculture cropping pattern, before arable land, spread fertilizer over the fields lime and organic fertilizer or
Farmyard manure is then uniform by Soil tillage in soil surface；By the bluish dogbane season of growth, kenaf seeds are sowed into the soil to after turning over
In the acid soil of earth heavy metal pollution, to bluish dogbane normal plants to 2 meter Gao Hou, sprayed into bluish dogbane crop root soil
Citric acid solution.Period carries out conventional bluish dogbane and plants field management.
Exemplary treatments: each processing is 10 compartments, if 5 cells, each cell is 2 compartments.First cell is control group
(CK), the 2nd ~ 5 cell is respectively demonstration group 1 ~ 4.Control group: citric acid is not sprayed, demonstration group 1 ~ 4: sprinkling citric acid concentration
Respectively 2,5,8,11mmol/L；It is 3000ml/ squares that citric acid solution, which sprays dosage,.
Processing method: configuration citric acid solution concentration is respectively 2,5,8,11mmol/L, according to 3000ml/ squares of dosage
It is sprayed near each demonstration group bluish dogbane plant root in soil, after harvesting bluish dogbane plant, makes plant up to constant weight with baking oven drying, it is right
Bluish dogbane plant is weighed, and is then crushed and is crossed 40 mesh (0.42mm) sieve again, mixed using concentrated nitric acid with perchloric acid (3:1)
Acid resolution measures cadmium content with AAnalyst300 type atomic absorption spectrophotometer.The result is shown in Figure 1 and Fig. 2.
The citric acid solution of sprinkling various concentration known to exemplary treatments, compared with control group (CK), bluish dogbane plant biology
Measure that difference is little, but heavy metal accumulation amount all increased in bluish dogbane plant, and 3 citric acid concentration of demonstration group be 8mmol/L and
Other concentration compare, and cadmium enriching quantity is apparently higher than other each groups.Therefore, it is most that in contrast citric acid concentration, which is 8mmol/L,
Suitable concentration.
Although the invention has been described by way of example and in terms of the preferred embodiments, but it is not for limiting the present invention, any this field
Technical staff without departing from the spirit and scope of the present invention, may be by the methods and technical content of the disclosure above to this hair
Bright technical solution makes possible variation and modification, therefore, anything that does not depart from the technical scheme of the invention, and according to the present invention
Technical spirit any simple modifications, equivalents, and modifications to the above embodiments, belong to technical solution of the present invention
Protection scope.
Claims (6)
1. a kind of improve bluish dogbane to the processing method of heavy metal cadmium remediation efficiency in acid soil, which is characterized in that specific
Steps are as follows:
Acid soil improvement: step a in the acid soil of pH value < 6, before arable land, spreads fertilizer over the fields lime and organic fertilizer or farmyard manure exists
Soil surface, then that Soil tillage is uniform, the heavy metal cadmium acid soil is: cadmium content range is in 0.2-100mg/
Kg, pH value < 6；
Step b sprays activator: pressing the bluish dogbane season of growth, kenaf seeds are sowed the heavy metal pollution of soil to after turning over
In acid soil, to bluish dogbane normal plants to 2 meter Gao Hou, citric acid solution is sprayed into bluish dogbane crop root soil；
Step c harvests bluish dogbane plant: according to bluish dogbane normal growth periods, bluish dogbane plant being harvested.
2. a kind of raising bluish dogbane according to claim 1 is to the processing side of heavy metal cadmium remediation efficiency in acid soil
Method, which is characterized in that described to spread fertilizer over the fields lime base applies 50 ~ double centner per acre, the calcium oxide content of lime primary every application in 2 years
It is required that moisture is below 5% 70% or more.
3. a kind of raising bluish dogbane according to claim 1 is to the processing side of heavy metal cadmium remediation efficiency in acid soil
Method, which is characterized in that the depth turned over is 20 ~ 30 centimetres.
4. a kind of raising bluish dogbane according to claim 1 is to the processing side of heavy metal cadmium remediation efficiency in acid soil
Method, which is characterized in that when sprinkling citric acid, after bluish dogbane height growth to 2m, branches and leaves are luxuriant, no disease and pests harm.
5. a kind of raising bluish dogbane according to claim 1 is to the processing side of heavy metal cadmium remediation efficiency in acid soil
Method, which is characterized in that citric acid solution concentration is 8mmol/L.
6. a kind of raising bluish dogbane according to claim 1 is to the processing side of heavy metal cadmium remediation efficiency in acid soil
Method, which is characterized in that it is 3000ml/ squares that citric acid solution, which sprays dosage,.
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| CN201910484567.3A CN110038884A (en) | 2019-06-05 | 2019-06-05 | It is a kind of to improve bluish dogbane to the processing method of heavy metal cadmium remediation efficiency in acid soil |
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| CN201910484567.3A CN110038884A (en) | 2019-06-05 | 2019-06-05 | It is a kind of to improve bluish dogbane to the processing method of heavy metal cadmium remediation efficiency in acid soil |
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Cited By (2)
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| CN111410237A (en) * | 2020-05-09 | 2020-07-14 | 中南林业科技大学 | Resource utilization method for waste polluted biomass |
| CN115382901A (en) * | 2022-09-06 | 2022-11-25 | 生态环境部南京环境科学研究所 | Cadmium-polluted soil remediation method by combining plants and microorganisms |
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Application publication date: 20190723 |