CN104438304A - Application of mesembrianthemum to repairing of lead polluted soil - Google Patents
Application of mesembrianthemum to repairing of lead polluted soil Download PDFInfo
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- CN104438304A CN104438304A CN201410728096.3A CN201410728096A CN104438304A CN 104438304 A CN104438304 A CN 104438304A CN 201410728096 A CN201410728096 A CN 201410728096A CN 104438304 A CN104438304 A CN 104438304A
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- mesembrianthemum
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Abstract
The invention relates to a plant repairing technology of lead polluted soil and particularly relates to application of mesembrianthemum to repairing of the lead polluted soil. Mesembrianthemum is planted on the soil containing pollutant lead and a lot of the lead in the polluted soil is absorbed by a mesembrianthemum root system and is transferred to organs of an over-ground part; and when the plant grows until the biomass of the over-ground part is maximum, the organs of the over-ground part of the plant are removed from the polluted soil so that the aim of removing the pollutant lead in the soil is realized. According to the application, the lead polluted soil is managed by enriching the plant mesembrianthemum; and the application has the advantages that the cost is low, the operability is high, the physicochemical property of the soil is not damaged, the secondary pollution is not caused, and the effects for preventing soil wind erosion and water erosion are good.
Description
Technical field
The present invention relates to lead-contaminated soil phytoremediation technology, is exactly a kind of method utilizing mesembrianthemum remediating lead-contaminated soil strictly speaking, i.e. the application of mesembrianthemum in remediating lead-contaminated soil.
Background technology
Lead is one of a kind of main heavy metal contaminants in environment, and China and all over the world ubiquity Lead Pollution in Soil situation, especially around mine, smeltery and highway, Situation of Lead Pollution is even more serious.Plumbous once after entering human body, by the normal work by blood interference nerve cell, destroy the existence of ferroheme and the permeability of cerebral microvascular in blood, brain development can be caused slow, unsound, the final intelligence affecting people, therefore to improvement and the reparation of lead-contaminated soil, be very urgent task.Phytoremediation technology of polluted soil low cost, not damage field ground structure, do not cause groundwater environment secondary pollution, beautify the environment, be easy to, by society is accepted, become the focus problem in science outside Present Domestic and forward position research direction.Nowadays, the requirement of people to environment is higher, not only will meet human settlements requirement, but also will reach certain Aesthetic Standards, while reduction level of pollution, also wishes to see beautifying of contaminated environment, and the flower plant first-selection that yes beautifies the environment.China's Of Flower Resources enriches, and particularly one, biennial herb flowers, of a great variety, widely distributed, cultivation history is long, and cultivation condition is clear and definite, has the features such as and good resistance not tight to the requirement such as water, fertilizer.Increasingly serious along with Situation of Lead Pollution, the research resistance of flowers to lead and the enriched character to lead, can be the toxic action stockpile of environmental contaminants on the one hand, material can be provided on the other hand for the purification of Lead pollution environment and landscape, enrich resistance to plumbous plant gene storehouse, for following genetic engineering enhancement technology provides material.But regulation effect is not very desirable in prior art.
Summary of the invention
The invention provides a kind of low cost, workable, not spoiled soil physicochemical property, do not cause secondary pollution and preventing pollution soil drifting, water erosion all had to the method for the improvement lead-contaminated soil of good effect, i.e. the application of mesembrianthemum in remediating lead-contaminated soil.
In order to realize foregoing invention object, the technical solution used in the present invention is as follows:
The grown on soil mesembrianthemum containing pollutant lead, the lead in contaminated soil is absorbed in a large number by mesembrianthemum root system, and transfer them to overground part organ, when plant grow to the upperground part biomass maximum time, plant shoot organ is removed from contaminated soil, thus realizes the object of removing pollutant in soil lead.
The mesembrianthemum planted to refer on soil directly sowing mesembrianthemum seed or be transplanted in lead-contaminated soil by the mesembrianthemum of Seedling Stage.
Describedly in lead-contaminated soil, plant mesembrianthemum, the mode of multiple cropping can be taked, namely first batch of mesembrianthemum grow to biomass maximum time, plant shoot organ is removed from contaminated soil, then repeats said process, until final remediating lead-contaminated soil.
Experiment proves that mesembrianthemum is a kind of plumbous enriching plant that can be used for lead-contaminated soil and repair, the present invention utilizes mesembrianthemum to the enrichment extraction effect of Pb in Soil, by planting mesembrianthemum on lead-contaminated soil, can at stable lead-contaminated soil, reduce the soil erosion and while not causing underground water secondary pollution, make lead-contaminated soil repaired.Compared with prior art, neither destroy the soil texture in existing lead contamination soil, greatly reduce rehabilitation expense again.
Detailed description of the invention
The grown on soil mesembrianthemum containing pollutant lead, the lead in contaminated soil is absorbed in a large number by mesembrianthemum root system, and transfer them to overground part organ, when plant grow to the upperground part biomass maximum time, plant shoot organ is removed from contaminated soil, thus realizes the object of removing pollutant in soil lead.
The mesembrianthemum planted to refer on soil directly sowing mesembrianthemum seed or be transplanted in lead-contaminated soil by the mesembrianthemum of Seedling Stage.
Describedly in lead-contaminated soil, plant mesembrianthemum, the mode of multiple cropping can be taked, namely first batch of mesembrianthemum grow to biomass maximum time, plant shoot organ is removed from contaminated soil, then repeats said process, until final remediating lead-contaminated soil.
The potted plant concentration gradient experiment of embodiment 1
4 process have been established in experiment altogether, and be respectively contrast (CK) and the process of three Pb concentration gradients, Pb adds concentration and is respectively: 1000mg kg
-1(T1), 3000mg kg
-1(T2), 5000mg kg
-1(T3), be respectively 2,6 and 10 times of national soil environment quality grade III Standard, the Heavy Metals added is Pb (NO
3)
2, be AR, join in soil with solid-state, fully mix, balance stand-by after one month.
Pot flowers is mesembrianthemum, grows after 5-6 sheet leaf be transplanted in above-mentioned process soil until seedling.3, every basin, repeats for 3 times.Water according to soil lack of water situation, make soil moisture content remain on about 70% of field capacity.Gather in the crops after plant maturation.
Experimental result is as follows:
As can be seen from Table 1, mesembrianthemum the upperground part biomass is less by the impact of Lead Pollution in Soil, along with lead adds the rising of concentration, its the upperground part biomass increases to some extent, but when lead concentration is too high, biomass starts to decline, and respectively processes and contrasts all without significant difference (p>0.05), showing stronger patience.
Under different Pb concentration gradient, the amount that mesembrianthemum absorbs Pb increases along with the rising adding Pb concentration in soil.In soil, Pb concentration is elevated to 5000mg kg
-1when, mesembrianthemum overground part Pb content reaches the critical content standard 1000mg kg that plumbous hyperaccumulative plant needs to reach substantially
-1, met a feature of plumbous hyperaccumulative plant.
Along with the raising of Pb pollution level, mesembrianthemum Pb transfer ratio (TF) becomes greatly gradually, and the ability to overground part transport Pb is strengthened gradually.In soil, Pb concentration reaches 5000mg kg
-1time, mesembrianthemum does not meet another feature of plumbous hyperaccumulative plant---transfer ratio >1.
Under different Pb concentration gradient, the Pb concentration coefficient (EC) of mesembrianthemum is less than 1, does not reach another feature of Pb hyperaccumulative plant---concentration coefficient >1.
Therefore, comprehensive plant is to the patience of lead and enrichment characteristics, and mesembrianthemum does not reach hyperaccumulative plant standard completely, is plumbous enriching plant.
Embodiment 2 smelts contaminated area soil potted plant experiment
Utilize the contaminated soil adopted in discarded Shenyang Smeltery Factory in 2007 to do potted plant experiment, lead content is 4020mg kg
-1(Y).Pollution-free soil is set for contrast (CK).Pot flowers is mesembrianthemum, grows after 5-6 sheet leaf be transplanted in above-mentioned process soil until seedling.3, every basin, repeats for 3 times.Gather in the crops after plant maturation.
Result of the test is as follows:
As can be seen from Table 2, mesembrianthemum smeltery's contaminated soil grown is similar to artificially contaminated soil rule to the enrichment characteristics of lead.Its upperground part biomass slightly declines, but with contrast all without significant difference (P>0.05), show stronger patience.Mesembrianthemum overground part Pb content has exceeded the critical content standard 1000mg kg that plumbous hyperaccumulative plant needs reach
-1, met a feature of plumbous hyperaccumulative plant.Mesembrianthemum Pb transfer ratio (TF) is greater than 1, and overground part Pb content is greater than root, meets another feature of plumbous hyperaccumulative plant---transfer ratio >1.Mesembrianthemum Pb concentration coefficient (EC) is less than 1, does not reach another feature of Pb hyperaccumulative plant---concentration coefficient >1.
Experimental result test with potted plant concentration gradient in the enrichment characteristics of mesembrianthemum to lead more consistent.
As can be seen from above 2 embodiments, mesembrianthemum no matter under manual simulation's pollutional condition, or grows in smeltery's lead-contaminated soil, all shows the feature of Pb enriching plant.Therefore can think that mesembrianthemum is Pb enriching plant, have stronger repair ability to Pb contaminated soil, can be used for the phytoremediation of lead-contaminated soil.
In table 1 artificially contaminated soil, mesembrianthemum is to the enrichment characteristics of lead
Table 2 to smelt in contaminated soil mesembrianthemum to the enrichment characteristics of lead
Claims (3)
1. the application of mesembrianthemum in remediating lead-contaminated soil, it is characterized in that: the grown on soil mesembrianthemum containing pollutant lead, the lead in contaminated soil is absorbed in a large number by mesembrianthemum root system, and transfer them to overground part organ, when plant grow to the upperground part biomass maximum time, plant shoot organ is removed from contaminated soil, thus realizes the object of removing pollutant in soil lead.
2. by the application of mesembrianthemum in remediating lead-contaminated soil described in claim 1, it is characterized in that: the mesembrianthemum planted to refer on soil directly sowing mesembrianthemum seed or be transplanted in lead-contaminated soil by the mesembrianthemum of Seedling Stage.
3. by the application of mesembrianthemum in remediating lead-contaminated soil described in claim 1, it is characterized in that: describedly in lead-contaminated soil, plant mesembrianthemum, the mode of multiple cropping can be taked, namely first batch of mesembrianthemum grow to biomass maximum time, plant shoot organ is removed from contaminated soil, repeat said process again, until final remediating lead-contaminated soil.
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| CN201410728096.3A CN104438304A (en) | 2014-12-04 | 2014-12-04 | Application of mesembrianthemum to repairing of lead polluted soil |
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| CN201410728096.3A CN104438304A (en) | 2014-12-04 | 2014-12-04 | Application of mesembrianthemum to repairing of lead polluted soil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109174937A (en) * | 2018-10-15 | 2019-01-11 | 上海邻肯园林科技有限公司 | A kind of heavy-metal contaminated soil restorative procedure |
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| CN1887457A (en) * | 2006-07-14 | 2007-01-03 | 云南省环境科学研究院 | Application and method of utilizing enriching plant in repairing lead polluted soil |
| CN101524702A (en) * | 2009-04-21 | 2009-09-09 | 辽宁石油化工大学 | Method for restoring lead polluted soil by in-situ strengthening plant |
| CN101745523A (en) * | 2008-12-15 | 2010-06-23 | 中国科学院沈阳应用生态研究所 | Method for repairing cadmium polluted soil by utilizing enrichment plant bidens tripartita |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1887457A (en) * | 2006-07-14 | 2007-01-03 | 云南省环境科学研究院 | Application and method of utilizing enriching plant in repairing lead polluted soil |
| CN101745523A (en) * | 2008-12-15 | 2010-06-23 | 中国科学院沈阳应用生态研究所 | Method for repairing cadmium polluted soil by utilizing enrichment plant bidens tripartita |
| CN101524702A (en) * | 2009-04-21 | 2009-09-09 | 辽宁石油化工大学 | Method for restoring lead polluted soil by in-situ strengthening plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109174937A (en) * | 2018-10-15 | 2019-01-11 | 上海邻肯园林科技有限公司 | A kind of heavy-metal contaminated soil restorative procedure |
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