CN104759456A - Method for repairing soil heavy mental lead pollution by virtue of high-lead-enrichment maize varieties - Google Patents
Method for repairing soil heavy mental lead pollution by virtue of high-lead-enrichment maize varieties Download PDFInfo
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- CN104759456A CN104759456A CN201510155659.9A CN201510155659A CN104759456A CN 104759456 A CN104759456 A CN 104759456A CN 201510155659 A CN201510155659 A CN 201510155659A CN 104759456 A CN104759456 A CN 104759456A
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Abstract
The invention discloses a method for repairing the soil heavy mental lead pollution by virtue of high-lead-enrichment maize varieties. The method comprises the following steps: measuring the content of lead in soil with heavy mental lead pollution firstly, and then selecting proper maize varieties, carrying out conventional planting water and fertilizer management, harvesting whole maize strains after a mature period is reached, and measuring the content of lead of seeds; preparing feeds from the seeds and carrying out ashing treatment on the remainder roots, stems and leaves if the lead content does not exceed the standard; and carrying out the ashing treatment on the whole strains and extracting heavy metal lead if the content of lead exceeds the standard. Repair and treatment are carried out on the soil with the heavy mental lead pollution by virtue of the high-lead-enrichment maize, so that environment disturbance is low, the physical and chemical properties of the soil are not damaged, secondary pollution is not caused, and expense is low; meanwhile, the maize is high in biomass, vigorous in vitality, short in growth period, and easy to cultivate and manage, is suitable for mechanized harvesting and large-area planting, and is capable of recycling the accumulated heavy metal lead, and thus further economic benefits are increased.
Description
Technical field
The invention belongs to the phytoremediation technology field of heavy metal pollution of soil, particularly relate to the method for a kind of lead high enrichment corn variety repairing heavy metal in soil lead contamination.
Background technology
Plumbous (Pb) pollutes one of the most serious heavy metal element in existing environment, brings serious harm, especially become very severe in Southwestern China, ALFISOL IN CENTRAL to animals and plants and the mankind.After Pb accumulates in soil, not only affect the seed output and quality of crops, and affect human health by food chain.There will be after lead poisoning have a stomach-ache, have a headache, the symptom such as to tremble, can causing death time serious.Research in recent years shows, lead contamination phenomenon is commonplace, particularly at Qian Xinwu ore deposit mining area, irrigating region and both sides of highway.At present, China, by nearly 2,000 ten thousand hectares of the cultivated area of the heavy metal pollutions such as Pb, accounts for 1/5 of total area under cultivation.Consider the catholicity and seriousness that Pb pollutes Pb in the harm of human body and soil, how to repair the study hotspot that Pb contaminated soil has become countries in the world scientist.
In the soil of heavy metal pollution, traditional improvement restorative procedure is generally the method for physics and chemistry, as dilution and covering method, vitrification, heat treatment technics, elution method, electrochemical process etc., although traditional restorative procedure regulation effect is good, last shorter, all there is many defects, as cost is high, be difficult to management, easily cause secondary pollution, large etc. to environmental perturbation.Substituting traditional administering method for finding new method, having a kind of economic and efficient phytoremediation technology to be used widely at present.
Phytoremediation technology refers to utilize plant and rhizosphere microorganism thereof to the absorption of soil pollutant, volatilization, conversion, degraded, fixation and remove the recovery technique of pollutant in soil.Phytoremediation is the principal mode solving heavy metal pollution at present, but it is lower to there is biological yield in traditional phytoremediation, the Pb total amount of whole strain accumulation is limited, therefore fail always large-scale promotion use, and it is longer to repair the time limit, causing ploughs leaves unused, and is not suitable for the heavy metal reparation of ploughing long-term in agriculture district.And plumbous high enrichment corn has good patience to Pb, and well developed root system, Aboveground Biomass of Young is large, be easy to cultivation management and mechanical harvest, and different cultivars, different tissues position heavy metal enrichment degree exist obvious difference, potentially becomes a kind of new rehabilitation plant.
Summary of the invention
The object of the present invention is to provide the method for a kind of lead high enrichment corn variety repairing heavy metal in soil lead contamination, be intended to solve traditional heavy metal lead pollution restorative procedure cost high, be difficult to management, easily cause secondary pollution, the problem large to environmental perturbation.
The present invention is achieved in that the method for a kind of lead high enrichment corn variety repairing heavy metal in soil lead contamination, comprising:
The content of step one, mensuration heavy metal lead pollution Lead In Soil;
Step 2, select suitable maize kind for heavy metal lead pollution degree, general planting water and fertilizer management;
Step 3, after the maturity period, whole strain harvesting is carried out to corn, Determination of Pb is carried out to seed simultaneously;
Step 4, lead content do not exceed standard, and seed is used for feed, and residue root, stem and leaf carries out ashing process, and what seed lead content exceeded standard carries out ashing process to whole strain, extracts heavy metal lead.
Further, different corn variety is different to plumbous enriching quantity coefficient, to soil remediation degree, repairs time limit difference.
The soil that the present invention is directed to different pollution level plants the different corn variety of plumbous enrichment degree, determining whether that whole strain is gathered in, extracting heavy metal lead, thus solving Lead Pollution in Soil problem after ripe by measuring seed lead content.Utilize plumbous high enrichment corn to lead-contaminated soil repairing and treating, there is, not spoiled soil physicochemical property few to environmental perturbation, do not cause secondary pollution, low cost, meanwhile, Corn Biomass is large, and vitality is vigorous, growth cycle is short, be easy to cultivation management, be suitable for mechanized harvest, be suitable for establishing in large scale, and can recycle the heavy metal lead of its accumulation, increase economic efficiency further.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of the lead high enrichment corn variety repairing heavy metal in soil lead contamination that the embodiment of the present invention provides.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Below in conjunction with drawings and the specific embodiments, application principle of the present invention is further described.
Refer to Fig. 1:
The present invention is achieved in that the method for a kind of lead high enrichment corn variety repairing heavy metal in soil lead contamination, comprising:
The content of S101, mensuration heavy metal lead pollution Lead In Soil;
S102, select suitable maize kind for heavy metal lead pollution degree, general planting water and fertilizer management;
S103, after the maturity period, whole strain harvesting is carried out to corn, Determination of Pb is carried out to seed simultaneously;
S104, lead content do not exceed standard, and seed is used for feed, and residue root, stem and leaf carries out ashing process, and what seed lead content exceeded standard carries out ashing process to whole strain, extracts heavy metal lead.
Further, different corn variety is different to plumbous enriching quantity coefficient, to soil remediation degree, repairs time limit difference.
Embodiment one
Test site is Sichuan Agricultural University Duo Ying farm warmhouse booth, and load for examination soil in the plastic tub of diameter 28cm, dark 25cm, every basin fills native 15kg.According to national standard of soil environment quality, test arranges 3 levels of pollution, and level of pollution 1 does not add Pb (NO
3)
2solution in contrast, then adds quantitative Pb (NO respectively level of pollution 2 and 3 times
3)
2solution.After mixing, final actual measurement level of pollution 1,2,3 concentration is respectively 50.65mgkg
-1(Soil Background Pb concentration), 333.32mgkg
-1and 715.46mgkg
-1(be greater than national regulation three grades of P in soil b threshold limit value 500mgkg
-1).
For 66 cross combinations (F1) that examination material obtains by the assembly of Griffing4 pattern for 12 self-mating systems provided by corn research institute of Sichuan Agricultural University.
Select for examination material seed of the same size, adopt the mode of seedlings nursing plate nursery, when seedling grows to 2-3 sheet leaf, select the seedling that growing way is consistent to move in plastic tub, in equilateral triangle arrangement, the strain of every basin 3,4 basins planted by every part of material.Water and fertilizer management is undertaken by corn Routine Management.
Gather after maturity period for examination material fringe position blade, complete with 105 DEG C after clean dirt, dry to constant weight through 65 DEG C after fruit ear harvest-seed extraction.Sample Universalpulverizer (model: Z-750) is pulverized, and crosses 40 mesh sieves, loads polybag for subsequent use.
Flame atomic absorption spectrometry (SHIMADZUAA-6600, Japan) is adopted to measure the heavy metal Pb content of maize leaf and seed.Pb standard liquid adopts national standard, and every increment product repeat for 3 times, and average, unit is mgkg
-1, the blank sample (5%HNO of overall process
3) contrast.
Under lead at different concentrations process, corn various combination aerial part dry weight sees the following form 1, and the result of multiple comparisons is in table 2.As shown in Table 2, be 50.65mgkg in P in soil b concentration
-1time, there is pole significant difference in the dry weight under milpa upper part dry weight and all the other two concentration Pb levels, and is 333.32 and 715.46mgkg in P in soil b concentration
-1under condition, milpa upper part dry weight, without significant difference, illustrates the Pb better resistance of corn to soil middle and high concentration.Pollute in high-concentration lead and (be greater than 333.32mgkg
-1) soil in the plumbous high enrichment breed organism amount of some corns do not have too large change.
Select Pb enriching quantity coefficient (in overground part plant element mass fraction × overground part phytomass/elements in Soil mass fraction) as the evaluation index of corn Pb accumulation ability, this index compares traditional concentration coefficient, certain aboveground vegetation part can not only be indicated preferably to accumulate the ability of heavy metal, more can reflect the adaptive capacity of plant heavy metal contaminated soil, Different Cross Combinations Pb enriching quantity coefficient is in table 3.
The plumbous high enrichment Combination application potentiality of cauline leaf is evaluated.Choose 5 combinations that enriching quantity coefficient under 3 Pb levels is maximum respectively, carry out soil remediation evaluation (table 4).Plant 50000 strains by per hectare, in 1 year 2 season of plantation, Pb contaminated soil degree of depth 15cm, soil density is with 2.57kgm
-3meter.
Comprehensive cauline leaf, seed Pb content and the reparation time limit, depollution level have for 3 times 4 combinations (Zheng 58 × prosperous 7-2, Zheng 58 × ES40, combine 31 × 178, Mo17 × R08) seed Pb content overproof outside, the combination that cauline leaf enriching quantity coefficient under all the other levels is higher all can while reparation Pb contaminated soil, take into account seed and be not subject to Pb pollution, ensure grain security production, although along with the rising of P in soil b concentration, repair the time limit to increase to some extent, but still within the acceptable range.
The soil remediation evaluation that table 4 cauline leaf height Pb combines
The plumbous low enrichment Combination application potentiality of cauline leaf is evaluated.Choose 5 combinations that cauline leaf Pb content under 3 Pb levels of pollution is minimum, carry out the evaluation of application potentiality, as can be seen from Table 5,3 combinations (Shen 137 × B73, Shen 137 × S37, prosperous 7-2 × ES40) under level of pollution 1 do not exceed the limit value (8mgkg of national forage health standard
-1), these three combinations are applicable to low Pb Polluted area, have both taken into account the feeding value of corn stem leaf, also avoid seed to be subject to Pb simultaneously and pollute.Although level of pollution 2 is still within the scope of the second grade soil of country's permission, but level of pollution 2 and 3 times, the cauline leaf Pb content superstate standard all far away of all combinations, level of pollution 1 time, also the combination cauline leaf of 95.45% is had to exceed standard, therefore this research shows the corn variety of preferably planting cauline leaf high accumulation of Pb in the soil of heavy metal lead pollution, because corn variety cauline leaf all can exceed standard mostly, answers ashing process after maturation.
The application potentiality of the low Pb combination of table 5 cauline leaf is evaluated
Above-mentioned example shows, corn has stronger patience to Lead sweet and has stronger accumulation capability to the lead in contaminated soil, the patience of different corn variety to lead is different with accumulation capability simultaneously, lead-contaminated soil for different pollution level can select suitable corn variety to carry out soil remediation, part kind seed does not exceed standard, and can also be used for feed and grain security production.
Utilize super enriching plant to the Principles of soil, the present invention absorbs by planting plumbous high enrichment corn and extracts by the lead in heavy metal lead pollution soil, thus solves Lead Pollution in Soil problem.Utilize plumbous high enrichment corn to lead-contaminated soil repairing and treating, there is, not spoiled soil physicochemical property few to environmental perturbation, do not cause secondary pollution, low cost, meanwhile, Corn Biomass is large, and vitality is vigorous, growth cycle is short, be easy to cultivation management, be suitable for mechanized harvest, be suitable for establishing in large scale, and can recycle the heavy metal lead of its accumulation, increase economic efficiency further.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a method for lead high enrichment corn variety repairing heavy metal in soil lead contamination, is characterized in that, high for lead enrichment corn variety is planted rehabilitating soil lead contamination in the soil of heavy metal lead pollution, method comprises:
The content of step one, mensuration heavy metal lead pollution Lead In Soil;
Step 2, for the low 50.65mgkg of heavy metal lead pollution degree
-1, middle 333.32mgkg
-1, high 715.46mgkg
-1, select the kind of the high plumbous enrichment of cauline leaf, the low accumulation of seed, general planting water and fertilizer management;
Step 3, after the maturity period, whole strain harvesting is carried out to corn, Determination of Pb is carried out to seed simultaneously;
Step 4, lead content do not exceed standard, and seed is used for feed, and residue root, stem and leaf carries out ashing process, and what seed lead content exceeded standard carries out ashing process to whole strain, extracts heavy metal lead.
2. the method for plumbous high enrichment corn variety repairing heavy metal in soil as claimed in claim 1 lead contamination, is characterized in that, different corn variety is different to plumbous enriching quantity coefficient, to soil remediation degree, repairs time limit difference.
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| CN201510155659.9A CN104759456A (en) | 2015-04-03 | 2015-04-03 | Method for repairing soil heavy mental lead pollution by virtue of high-lead-enrichment maize varieties |
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|---|---|---|---|
| CN201510155659.9A CN104759456A (en) | 2015-04-03 | 2015-04-03 | Method for repairing soil heavy mental lead pollution by virtue of high-lead-enrichment maize varieties |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109174952A (en) * | 2018-07-27 | 2019-01-11 | 江苏隆昌化工有限公司 | A kind of passivation of cadmium lead contamination farmland plus low-accumulation plants restorative procedure |
| CN109967518A (en) * | 2017-12-27 | 2019-07-05 | 中环沃野环保有限公司 | A method of polluted soil is quickly repaired using MP Matrix Technology |
| CN111235305A (en) * | 2020-03-27 | 2020-06-05 | 四川农业大学 | SNP molecular markers related to lead transport coefficient of corn plants and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5927005A (en) * | 1997-04-09 | 1999-07-27 | Board Of Regents, The University Of Texas | Phytoremediation of heavy metals with creosote plants |
| CN101185937A (en) * | 2007-10-30 | 2008-05-28 | 浙江大学 | Method for reducing coexist crop Pb accumulation |
| CN102934580A (en) * | 2012-11-21 | 2013-02-20 | 中国科学院亚热带农业生态研究所 | Planting method of jute in heavy-metal contaminated soil |
-
2015
- 2015-04-03 CN CN201510155659.9A patent/CN104759456A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5927005A (en) * | 1997-04-09 | 1999-07-27 | Board Of Regents, The University Of Texas | Phytoremediation of heavy metals with creosote plants |
| CN101185937A (en) * | 2007-10-30 | 2008-05-28 | 浙江大学 | Method for reducing coexist crop Pb accumulation |
| CN102934580A (en) * | 2012-11-21 | 2013-02-20 | 中国科学院亚热带农业生态研究所 | Planting method of jute in heavy-metal contaminated soil |
Non-Patent Citations (1)
| Title |
|---|
| 代全林 等: "玉米各器官积累Pb能力的品种间差异", 《植物生态学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109967518A (en) * | 2017-12-27 | 2019-07-05 | 中环沃野环保有限公司 | A method of polluted soil is quickly repaired using MP Matrix Technology |
| CN109174952A (en) * | 2018-07-27 | 2019-01-11 | 江苏隆昌化工有限公司 | A kind of passivation of cadmium lead contamination farmland plus low-accumulation plants restorative procedure |
| CN111235305A (en) * | 2020-03-27 | 2020-06-05 | 四川农业大学 | SNP molecular markers related to lead transport coefficient of corn plants and application thereof |
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Application publication date: 20150708 |