CN102671929A - Application of eucalyptus grandis in remediation for soil polluted by heavy metals of copper, lead and zinc - Google Patents
Application of eucalyptus grandis in remediation for soil polluted by heavy metals of copper, lead and zinc Download PDFInfo
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- CN102671929A CN102671929A CN2012101610180A CN201210161018A CN102671929A CN 102671929 A CN102671929 A CN 102671929A CN 2012101610180 A CN2012101610180 A CN 2012101610180A CN 201210161018 A CN201210161018 A CN 201210161018A CN 102671929 A CN102671929 A CN 102671929A
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Abstract
The invention relates to a plant remediation technology for soil polluted by heavy metals of copper, lead and zinc, and discloses a method for remediation for a soil polluted by copper, lead and zinc by utilizing eucalyptus grandis of Myrtaceidites. In the technology, the eucalyptus grandis is planted in the soil polluted by the heavy metals of copper, lead and zinc, and the accumulated heavy metals of copper, lead and zinc are absorbed by virtue of the enrichment characteristic of the plants of the eucalyptus grandis on the copper, lead and zinc, and are transported to the overground parts of the plants; and the plants are intermediately cut by 50% after being planted for two years and completely cut after being planted for four years, an ashing treatment is performed and the heavy metals are extracted, so as to achieve a purpose of remediation for the soil polluted by the copper, lead and zinc. The eucalyptus grandis is one of the three fast-growing tress species in the world, as well as is high in biomass, flourishing in root system, and capable of absorbing and holding lots of heavy metals and water, so as to play roles in preventing the dispersion of pollution and raising the virescence level of polluted districts.
Description
Technical field
The present invention relates to the recovery technique field of heavy metal pollution in the environment, especially the application of kind of plant alpine ash in repairing heavy metal in soil copper, lead, zinc pollution.
Background technology
Along with the influence of mankind's activity, heavy metal pollutions such as Cu, Pb, Zn harm is increasing, and pollution range also presents the trend of continuous diffusion.Improvement behind the mining has also caused everybody extensive concern.Therefore, reparation and the improvement to heavy metal pollutions such as Cu, Pb, Zn has become one of problem demanding prompt solution.
Phytoremediation technology is a kind of green ecological recovery technique of removing heavy metal pollution of soil that is mainly used in that development in recent years is got up.This technology have efficient low-consume, engineering little, conserve water and soil, non-secondary pollution, can reduce the soil erosion, beautify advantage such as view, having a wide range of applications aspect the heavy metal pollution of soil removing, become the focus of international academic community research.
Phytoremediation comprises plant extraction, and rhizosphere filters, and phytovolatilization and plant are fixed.Research before much all is to concentrate on to choose enrichment and the purpose (like patent 200810045743.5) of super enriching plant to reach extracting heavy metal.Yet heavy metal pollution area (especially mining area) often vegetation is rare; The greening level is low; Not only cause soil erosion easily; Therefore also can cause the diffusion of heavy metal pollution, seek more that the multi-to-multi heavy metal species all has good patience and enriched character, the plant that has economic benefit and environmental benefit concurrently becomes a possible technique scheme of heavy metal reparation.
Summary of the invention
The inventor finds in the research work of being engaged in the heavy metal pollution reparation: (Latin is by name for Myrtaceae eucalyptus plant alpine ash
Eucalyptus grandis), the heavy metal copper in the soil environment, lead, zinc are had significant patience and enriched character.Therefore, the object of the invention provides a kind of new application of plant variety alpine ash in rehabilitating soil copper, lead, zinc pollution with regard to being to heavy metal pollution of soil phytoremediation and the problem of administering deficiency.
In order to realize the foregoing invention purpose, the technical scheme that the present invention adopts is following:
The application of alpine ash in repairing heavy metal in soil copper, lead, zinc pollution; Alpine ash is planted in the soil of heavy metal copper, lead, zinc pollution; Utilize enriched character absorption and accumulation heavy metal copper, lead, the zinc of its plant, and it is transported to above-ground plant parts copper, lead, zinc; Regularly alpine ash is carried out the repairing of leaf and limb, and concentrate the leaf and the limb of repairing are carried out ashing treatment, the soil of heavy metal copper, lead, zinc pollution is repaired and fixed.To reach the purpose of repairing copper, lead, zinc pollution soil.
Its concrete steps comprise:
1. put in order the ground basal dressing: last month of spring in winter, whole ground was cultivated in the cave at the beginning, and planting density is 1.5m * 1.5m, cave diameter 50cm, degree of depth 30cm (in the area, mine of many chads, the cave can be dug greatly, the soil amount of the every strain sapling of increase plantation).Every mu to use the base fertilizer amount following: purity nitrogen 10kg, phosphorus (P
2O
5) 8.5kg, potassium (K
2O) 7kg.If repairing the place is neutral soil or alkaline soil, every square metre of ferrous sulfate powder that should apply 200g is modified to acid soil, helps the survival and the growth of alpine ash.
2. plant seedling: at annual three the end of month, perhaps overcast and rainy when selecting ground moistening, with the alpine ash seedling of plant height 25-30cm, direct transplanting is in the middle of the soil of heavy metal copper, lead, zinc pollution.
3. management: dig long 25cm at tree 40-50cm place, both sides annual 6 the end of month, wide 20cm, and whenever spread manuer in holes and use fertilizer dedicated to eucalyptus 0.45kg in the cave of dark 15cm.In the season of rainwater deficiency, in time pour water, each every mu of 40-50 side of pouring water remains on about 75% the water content of soil.
4. extract and handle: intermediate cutting 50% after planting 2 years, in plantation all felling after 4 years, carry out ashing treatment, extract heavy metal.
The intermediate cutting 50% of step described in 4. is meant that 50%, the three year of disposable felling aerial part biomass at behind plantation alpine ash year end second is not cut down.
When the soil of heavy metal copper, lead, zinc pollution is neutral soil or alkaline soil, add the ferrous sulfate powder and be modified to acid soil, undertaken by every square metre of ferrous sulfate powder that applies 200g.Every square metre of ferrous sulfate powder that applies 200g reduces the pH value of 1.0 units approximately.
Compared with prior art, the invention has the beneficial effects as follows:
The inventor finds that through experimental study alpine ash has significant patience and enriched character to heavy metals such as copper, lead, zinc.Alpine ash vitality is indomitable, in the soil of high concentration heavy metal pollution, still can grow preferably, and heavy metals such as copper, lead, zinc are had good patience.The alpine ash well developed root system can be stablized the face of land, and fixing moisture can effectively be controlled the diffusion of pollutant in a large number; Utilize the fast natural disposition of alpine ash, can improve the green ring level of IA of repairing as early as possible, improve environmental benefit; The alpine ash plantation is simple to operate, and cost is lower, is a kind of plant that supplies the large tracts of land engineering control.
The specific embodiment
Below in conjunction with the specific embodiment the present invention is made further detailed description.
But should this be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following embodiment.
Embodiment 1 sub-district soil remediation test
The test place is teaching and scientific research farm, school district, Sichuan Agricultural University Yaan, and sub-district soil picks up from Hanyuan, Yaan Mount Putuo lead-zinc ore tailings dregs, and soil pH is 7.43, and copper, lead, zinc content are respectively 216.99 mg kg
-1, 248.30 mg kg
-1, 266.79mg kg
-1The concrete practice is: press every mu of purity nitrogen 10kg, phosphorus (P at the beginning of March
2O
5) 8.5kg, potassium (K
2O) standard of 7kg is used base manure, fertilizer and soil mixing.Divide 4 sub-districts, it is 50cm that diameter is dug by the planting density of 1.0m * 1.0m, 1.5m * 1.5m, 1.5m * 1.5m, 2.0m * 2.0m respectively in sub-district 1,2,3,4, and the degree of depth is the 30cm nest.Wherein, sub-district 1,2,4 is applied 200g ferrous sulfate powder by every square metre carry out soil improvement, the soil pH after the improvement is reduced to 6.31.The moistening soil of pouring water in advance at three the end of month, in the cave, dig long 25cm at tree 40-50cm place, both sides 6 the end of month with the alpine ash seedling cultivation of plant height 20-25cm, wide 20cm, whenever spread manuer in holes and use fertilizer dedicated to eucalyptus 0.45kg in the cave of 15cm deeply.360 days post-samplings, each sub-district are randomly drawed wherein 3 strain plants, measure result such as table 1:
The alpine ash of table 1. different districts is to the enrichment characteristics of Cu, Pb, Zn
Can find out that from table 1 accumulation ability of sub-district 1,2,4 is better than sub-district 3, this explanation alpine ash has shown better accumulation ability under the acid ground condition.Contrast sub-district 1,2,4 can find out that the alpine ash of sub-district 2 all is the strongest to the accumulation ability of Cu, Pb, Zn, and therefore, when alpine ash was 1.5m * 1.5m in planting density, repairing effect was best.
Embodiment 2 is potted plant to coerce test
The test place is located at Sichuan Agricultural University teaching and scientific research farm.
Adopt the method for potted plant simulated soil heavy metal pollution, (Latin is by name with Myrtaceae eucalyptus plant alpine ash
Eucalyptus grandis) seedling replanting is in adding the potted plant soil that gradient concentration heavy metal copper, lead, zinc pollution cross.This was tested November, and transplanting the alpine ash seedling is the group training seedling of picking up from Mingshan County, Ya'an, Sichuan Province, 2 in every basin, 4 repetitions.In the test, heavy metal copper is established 5 processing altogether, is respectively the different concentration that add with 4 of CK (not adding Cu) and tests, and adding concentration is 100mg kg
-1(T1), 600 mg kg
-1(T2), 900 mg kg
-1(T3), 1200 mg kg
-1(T4), the heavy metal form that adds is CuSO
45H
2O; Heavy metal lead is established 6 processing altogether, is respectively the different concentration that add with 5 of CK (not adding Pb) and tests, and adding concentration is 100mg kg
-1(T1), 300 mg kg
-1(T2), 600 mg kg
-1(T3), 900 mg kg
-1(T4), 1200 mg kg
-1(T5), the heavy metal form that adds is Pb (NO
3)
2Heavy metal zinc is established 5 processing altogether, is respectively the different concentration that add with 4 of CK (not adding Cu) and tests, and adding concentration is 300mg kg
-1(T1), 600 mg kg
-1(T2), 900 mg kg
-1(T3), 1500 mg kg
-1(T4), the heavy metal form that adds is ZnSO
47H
2O.More than used medicine be AR, join in the soil with solid-state, abundant mixing, the back is for use around the balance.Plant is cultivated in the solarium, and way to manage is identical with the alpine ash general management.The sample of gathering after 9 months is measured biomass and the aerial part of the alpine ash cumulant to heavy metal Cd.
Result of the test is following:
Alpine ash is to the enrichment characteristics of Cu, Pb, Zn under the table 2. different disposal concentration
Can find out that from table 2 heavy metal Cu concentration reaches 600 mg kg
-1The time, alpine ash still can be grown, and the cumulant of root has reached 2206.39 μ g/ basins; Pb concentration reaches 1200 mg kg
-1The time, the cumulant of root has reached 34166.88 μ g/ basins; Zn concentration reaches 1500 mg kg
-1The time, the cumulant of root has reached 10482.44 μ g/ basins, and the overground part cumulant has also reached 27990.26 μ g/ basins.Therefore, alpine ash all has stronger patience and certain accumulation ability to Cu, Pb, Zn.In addition, the well developed root system of alpine ash can obviously be found from table 1, its fixing a large amount of heavy metals; The mine is vegetation sparse often, and the growth of alpine ash is water and soil more fixedly, plays preventing contamination, the effect of greening environment.Particularly alpine ash is 600 mg kg in Cu concentration
-1, Pb concentration is 1200 mg kg
-1, Zn concentration is 1500 mg kg
-1The time, repairing effect is best.
Comprehensive alpine ash is to patience and the enrichment characteristics of Cu, Pb, Zn; Alpine ash is the plant of strong patience and the strong enrichment characteristics of Cu, Pb, Zn; Contaminated soil had stronger repair ability; Of particular concern is living ability of root system, speed and the strong patience that to utilize alpine ash flourishing, improve the greening level of IA, prevent the diffusion of heavy metal pollution and the loss of water and soil.
Claims (4)
1. the application of alpine ash in repairing heavy metal in soil copper, lead, zinc pollution; It is characterized in that: alpine ash is planted in the soil of heavy metal copper, lead, zinc pollution; Regularly alpine ash is carried out leaf and limb repairing; And concentrate the leaf and the limb of repairing are carried out ashing treatment, the soil of heavy metal copper, lead, zinc pollution is repaired and fixed.
2. the application of alpine ash according to claim 1 in repairing heavy metal in soil copper, lead, zinc pollution is characterized in that: alpine ash is transplanted in the soil of copper, lead, zinc pollution, and its concrete steps comprise:
1. whole ground basal dressing: last month of spring in winter, whole ground was cultivated in the cave at the beginning, and planting density is 1.5m * 1.5m, cave diameter 50cm, and degree of depth 30cm, every mu to use the base fertilizer amount following: purity nitrogen 10kg, phosphorus pentoxide 8.5kg, potassium oxide 7kg;
2. plant seedling: at annual three the end of month, perhaps overcast and rainy when selecting ground moistening, with the alpine ash seedling of plant height 25-30cm, direct transplanting is in the middle of the soil of heavy metal copper, lead, zinc pollution;
3. management: dig long 25cm at tree 40-50cm place, both sides annual 6 the end of month, wide 20cm, and whenever spread manuer in holes with the fertile 0.45kg of eucalyptus in the cave of dark 15cm;
4. extract and handle: intermediate cutting 50% after planting 2 years, huge by carrying out ashing treatment in plantation all felling after 4 years to what cut down, extract heavy metal.
3. the application of alpine ash according to claim 2 in repairing heavy metal in soil copper, lead, zinc pollution; It is characterized in that: the intermediate cutting 50% of step described in 4.; Be meant not cutting down in 50%, the three year of behind the plantation alpine ash disposable felling aerial part biomass at the year end second.
4. the application of alpine ash according to claim 2 in repairing heavy metal in soil copper, lead, zinc pollution; It is characterized in that: when the soil of heavy metal copper, lead, zinc pollution is neutral soil or alkaline soil; Add the ferrous sulfate powder and be modified to acid soil, undertaken by every square metre of ferrous sulfate powder that applies 200g.
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Cited By (9)
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| CN103406349A (en) * | 2013-08-21 | 2013-11-27 | 广西壮族自治区环境保护科学研究院 | Method for remediating acid/heavy metal lead composite polluted soil by using Pennisetum hydridum |
| CN103493712A (en) * | 2013-09-24 | 2014-01-08 | 温奕区 | Wind-resistance strip-shaped furrow planting method for eucalyptuses |
| CN104126405A (en) * | 2014-08-06 | 2014-11-05 | 兰州大学 | Method for remedying calcicolous soil polluted by heavy metals of copper and lead through phytostabilization |
| CN107695086A (en) * | 2017-09-20 | 2018-02-16 | 绍兴鑫广科技有限公司 | The depth restorative procedure of soil near chemical plant |
| CN108246798A (en) * | 2017-12-28 | 2018-07-06 | 青岛冠中生态股份有限公司 | Utilize the method for spray seeding technique restoration of soil polluted by heavy metal |
| CN108781579A (en) * | 2018-06-01 | 2018-11-13 | 江西绿巨人生态环境股份有限公司 | A kind of ecological environment reparation plantation technique |
| CN109158412A (en) * | 2018-06-26 | 2019-01-08 | 昆明理工大学 | A kind of method of harmless treatment heavy metal soil |
| CN109702009A (en) * | 2018-12-12 | 2019-05-03 | 安徽农业大学 | The application and method of a kind of Festuca Arundinacea in processing municipal sludge heavy metal pollution |
| CN113560335A (en) * | 2021-08-16 | 2021-10-29 | 桂林理工大学 | Method for restoring heavy metal contaminated soil by enhanced super-accumulation plants |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103406349A (en) * | 2013-08-21 | 2013-11-27 | 广西壮族自治区环境保护科学研究院 | Method for remediating acid/heavy metal lead composite polluted soil by using Pennisetum hydridum |
| CN103406349B (en) * | 2013-08-21 | 2015-08-19 | 广西壮族自治区环境保护科学研究院 | Hybrid giant napier is utilized to repair the method for acid and heavy metal lead combined contamination soil |
| CN103493712A (en) * | 2013-09-24 | 2014-01-08 | 温奕区 | Wind-resistance strip-shaped furrow planting method for eucalyptuses |
| CN104126405A (en) * | 2014-08-06 | 2014-11-05 | 兰州大学 | Method for remedying calcicolous soil polluted by heavy metals of copper and lead through phytostabilization |
| CN104126405B (en) * | 2014-08-06 | 2016-05-25 | 兰州大学 | The fixing restorative procedure of plant of heavy metal copper, lead contamination calcareous soil |
| CN107695086A (en) * | 2017-09-20 | 2018-02-16 | 绍兴鑫广科技有限公司 | The depth restorative procedure of soil near chemical plant |
| CN108246798A (en) * | 2017-12-28 | 2018-07-06 | 青岛冠中生态股份有限公司 | Utilize the method for spray seeding technique restoration of soil polluted by heavy metal |
| CN108781579A (en) * | 2018-06-01 | 2018-11-13 | 江西绿巨人生态环境股份有限公司 | A kind of ecological environment reparation plantation technique |
| CN109158412A (en) * | 2018-06-26 | 2019-01-08 | 昆明理工大学 | A kind of method of harmless treatment heavy metal soil |
| CN109702009A (en) * | 2018-12-12 | 2019-05-03 | 安徽农业大学 | The application and method of a kind of Festuca Arundinacea in processing municipal sludge heavy metal pollution |
| CN113560335A (en) * | 2021-08-16 | 2021-10-29 | 桂林理工大学 | Method for restoring heavy metal contaminated soil by enhanced super-accumulation plants |
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Application publication date: 20120919 |