CN101850359B - Method for remediating lead-contaminated soil or water - Google Patents
Method for remediating lead-contaminated soil or water Download PDFInfo
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- CN101850359B CN101850359B CN2010102047752A CN201010204775A CN101850359B CN 101850359 B CN101850359 B CN 101850359B CN 2010102047752 A CN2010102047752 A CN 2010102047752A CN 201010204775 A CN201010204775 A CN 201010204775A CN 101850359 B CN101850359 B CN 101850359B
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- 239000002689 soil Substances 0.000 title claims abstract description 68
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 241000196324 Embryophyta Species 0.000 claims abstract description 23
- 238000011109 contamination Methods 0.000 claims abstract description 18
- 238000003306 harvesting Methods 0.000 claims abstract description 13
- 235000006386 Polygonum aviculare Nutrition 0.000 claims description 52
- 229910001385 heavy metal Inorganic materials 0.000 claims description 15
- 230000008439 repair process Effects 0.000 claims description 10
- 238000007667 floating Methods 0.000 claims description 7
- 238000005065 mining Methods 0.000 claims description 4
- 210000003608 fece Anatomy 0.000 claims description 3
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- 241001377695 Polygonum arenastrum Species 0.000 claims 15
- 230000007306 turnover Effects 0.000 claims 1
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- 241000205407 Polygonum Species 0.000 abstract description 7
- 238000000605 extraction Methods 0.000 abstract description 3
- 238000005067 remediation Methods 0.000 abstract 1
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- 241000219198 Brassica Species 0.000 description 2
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- 238000012545 processing Methods 0.000 description 2
- 235000010149 Brassica rapa subsp chinensis Nutrition 0.000 description 1
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- 241000499436 Brassica rapa subsp. pekinensis Species 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a method for remediating lead-contaminated soil or water, which comprises the following steps: (1) collecting Polygonum criopolitanum; (2) planting Polygonum criopolitanum in soil or water; (3) periodically harvesting the Polygonum criopolitanum and part of stolons above the ground or water; (4), continuing to plant and harvest the Polygonum criopolitanum till the lead content of the soil or water reaches a safe standard; and (5) performing pollution-free disposal on the harvested Polygonum criopolitanum. In the method of the invention, the Polygonum criopolitanum is planted in the lead-contaminated soil or water, so extraction can be performed continuously, the remediation process of the soil and water is simplified, and the lead contamination problem of soil can be solved radically. The method of the invention is low in cost and high in maneuverability and avoids damaging the structure of the environmental soil and causing secondary pollution.
Description
Technical field
The present invention relates to lead contamination and administer technical field, be specifically related to the method for a kind of remediating lead-contaminated soil or water body.
Background technology
Along with rapid economy development, the increase of human industrial and agricultural production activity, the heavy metal pollution of soil problem is on the rise.According to estimation, at present Chinese contaminated cultivated area is nearly 2,000 ten thousand hectares, account for the total cultivated area 1/5 (Wei Chaoyang, Chen Tongbin. heavy metal super-enriched plant and phytoremediation technology progress. Acta Ecologica Sinica 2001,21 (7): 1196-1203.).Because the generality and the seriousness of soil lead contamination, some scholars classify lead as the most important and typical heavy metal contaminants of China's soil pollution.Sewage irrigation, mud are used, are contained the heavy metal dusts atmospheric sedimentation, contain the use of heavy metal agricultural chemicals, farmland periphery mining and smelting activity and to use doped fuel etc. in history for a long time be to cause China's agricultural land soil to suffer the main cause of heavy metal pollution.
The lead contamination of soil causes day by day seriously that lead exceeds standard seriously in grain, vegetables and the fruit in many places.In the vegetable field heavy metal-polluted soil of Guangzhou, lead contamination the most general (Wei Xiuguo, what Jiang Hua, Chen Junjian, Du Yingqiong, Yang Xiuqin. Guangzhou vegetable field heavy metal pollution of soil status investigation and evaluation. soil and environment 2002,11 (3): 252-254.).The lead content exceeding standard rate is 21.4% in Jiangsu Province's grain, some areas exceeding standard rate reach 66% (Zhao Qiguo, Zhou Ping Zhong, Yang Hao. the research of Jiangsu Province's environmental quality and agriculture safety problem. soil 2002,34 (1): 1-8.).The plumbous exceeding standard rate of the Chinese cabbage that the suburbs, Shenyang City receives to produce on the heavy metal pollution farmland reach 100% (all sparks. strengthen the heavy metal pollution of fertilizer standardized management control vegetables. Environmental Pollution and Control 2003,25 (5): 281-285.).
Lead is compared with other pollutant, and the holdup time in environment is longer.Get into the lead in the soil, be easy to organic the combination, extremely be difficult for dissolving, be prone to almost in the long time, can be absorbed, get into human body through food chain by crop in the accumulation of table soil.Children are poorer than the adult to the defensive ability/resistance ability of lead, therefore become the people at highest risk of lead contamination.According to investigations; China's children blood lead surpasses national standard person and reaches three one-tenth; The big city exceeding standard rate reaches more than 60%, and the urban district generally be higher than the suburb (Xiao Jinhua. heavy metal contamination of urban soils in China progress and countermeasured to bring inflation under control. environmental science with the management .2009,34 (4): 25-28.); Urban Area of Shanghai City industrial area children blood lead exceeding standard rate reaches (http://www.iibaby.net/iibaby61/uuu7.htm) more than 85%; Shenyang 50% above children for the people at highest risk of lead contamination (Wang Chunmei, Ou Yanghua, Wang Jinda, Liu Jingshuan, Zhang Xuelin, Wang Yan. Shenyang City's environment lead contamination is to the influence of children's health. environmental science 2003,24 (5): 17-22.).
The restorative procedure of heavy metal pollution of soil mainly contains: chemosetting method, soil elution method, electronic repairing method and phytoremediation technology.Compare with first three methods; Phytoremediation technology have the investment and maintenance cost low, easy and simple to handle, do not cause secondary pollution, have potential or show characteristics such as economic benefit; Also have simultaneously physics, chemical repair method incomparable cost, not the damage field ground structure, beautify the environment, be prone to advantage such as accepted for society, development prospect, ten minutes was wide.
At present, phytoremediation mainly is meant plant extraction, and studying maximum is the extraction repair of using super enriching plant.Super enriching plant is meant that mainly those have the plant that extremely strong absorption and accumulation ability and itself can not receive its murder by poisoning to heavy metal.But the super enriching plant ubiquity biomass of having found at present is little, problems such as environmental suitability difference.And the plumbous super enriching plant quantity of finding is few, does not occur the real case that puts into production and use both at home and abroad as yet.
Summary of the invention
The super enriching plant that exists in the phytoremediation that the objective of the invention is to administer according to existing lead contamination exists biomass little; Problems such as environmental suitability difference provide a kind of environmental suitability by force, not destroy the method for the remediating lead-contaminated soil or the water body of ambient soil structure.
The object of the invention is achieved through following technical scheme:
Hairy knotweed herb or root, humidogene is a kind ofly can be grown in shallow water, can be grown in the amphibious type plant of mud bank or soil again.It can directly be planted in receiving lead-contaminated soil or shallow water area, carries out the reparation of soil or water body; In deepwater regions, can use fixedly hairy knotweed herb or root of floating bed, plant base portion or bottom are dipped in the water, and the water surface is endured out on top, carries out the reparation of water body.
The present invention is through planting hairy knotweed herb or root in soil that receives lead contamination or water body; By the lead in hairy knotweed herb or root root system and a large amount of absorptions of stolon and activation contaminated soil or the water body; And lead is transferred to the overground part of hairy knotweed herb or root; Treat that overground part forms certain biomass, periodical reaping ground or water body top and part stolon keep root system and part stolon and are beneficial to hairy knotweed herb or root regeneration; Through shifting lead in soil or the water body continuously to the hairy knotweed herb or root overground part and gather in the crops the hairy knotweed herb or root overground part continuously, thereby realize removing the plumbous purpose of pollutant in contaminated soil or the water body.
The concrete steps of the inventive method are following: hairy knotweed herb or root (Polygonum criopolitanum Hance) is gathered in (1); (2) getting hairy knotweed herb or root plants in soil or water body; (3) hairy knotweed herb or root on periodical reaping ground or water body top and part stolon; (4) continue plantation, harvesting hairy knotweed herb or root, the lead content in soil or water body reaches safety standard; (5) hairy knotweed herb or root with harvesting carries out harmless treatment.
As a kind of preferred version, hairy knotweed herb or root is the hairy knotweed herb or root of growing under the natural conditions described in the inventive method step (1).Transplant if temporarily can't carry out cuttage, can the field hairy knotweed herb or root that obtains of gathering temporarily be placed water or Hoagland nutrient solution.
As a kind of preferred version; Hairy knotweed herb or root branch described in the inventive method step (2) soaks 1～3h No. 2 with 30ppm ABT root-inducing powder before cuttage; Perhaps be immersed in water or the Hoagland nutrient solution 2～4 days, treat that it grows tangible root system and carries out cuttage again, to improve the survival rate of cuttage.The cuttage spacing can be 15cm * 15cm, adjusts according to actual conditions.
As a kind of preferred version, in the inventive method step (2), when repair be the shallow water area of lead contamination water body the time, with the hairy knotweed herb or root branch cutting of intercepting in the water body shallow water area; When repair be the deepwater regions of lead contamination water body the time, in the water body deepwater regions floating bed is set, and punching on floating bed, the hairy knotweed herb or root branch is inserted in the hole.Wherein, said floating bed is preferably the polyvinyl chloride foam plate.
As a kind of preferred version; When the hairy knotweed herb or root on periodical reaping ground or water body top and part stolon described in the inventive method step (3); Reserve part stolon in every 10cm * 10cm scope, guaranteeing has 1 growing point in every 10cm * 10cm scope, so that hairy knotweed herb or root can continued growth.
As a kind of preferred version, in the inventive method step (4), said harvesting is harvesting in every month spring 1 time, and per 2～3 months of all the other seasons, harvesting was 1 time.
As a kind of preferred version, harmless treatment described in the inventive method step (5) is that the hairy knotweed herb or root plant is burned, and perhaps turns over to be embedded in the tailing dam of heavy metal mining area, with as the required green manure of mine tailing landfill revegetation.
When repair be lead-contaminated soil the time, in order to improve the speed of growth of hairy knotweed herb or root, thereby improve recovery rate plumbous in lead-contaminated soil or the water body, can before the plantation hairy knotweed herb or root, in soil, apply base manure, and in growth course, topdress.
Compared with prior art, the present invention has following beneficial effect:
It is a kind of plumbous enriching plant that restorative procedure of the present invention has utilized hairy knotweed herb or root, and its growth is rapid, and environmental suitability is strong; Have characteristics such as being prone to breeding, biomass are flooded greatlyyer, anti-, anti-lead contamination; Hairy knotweed herb or root is planted in the soil or water body that receives lead contamination, can regrowth after the harvesting of its aerial part, need not to sow again plantation; Simplify the repair process of soil or water body, and can permanently solve soil lead contamination problem.Restorative procedure cost of the present invention, workable, do not destroy the ambient soil structure, do not cause secondary pollution.
The specific embodiment
Come further to explain the present invention below in conjunction with embodiment, but embodiment does not do any type of qualification to the present invention.
Embodiment 1
This test is carried out in the Shaoguan, Guangdong Province, and the soil lead content is 2718mg kg
-1On this lead-contaminated soil, plant hairy knotweed herb or root, plant a kind of Cruciferae brassica plant simultaneously as check plant (plant that this section belongs to is considered to that heavy metal is had stronger accumulation ability), implantation time is 2008.Result of the test shows, in this trial zone soil, the hairy knotweed herb or root part mean lead content of gathering is 956mg kg
-1, approach critical content standard (the 1000mg kg of plumbous super enriching plant
-1).And the overground part mean lead content of Cruciferae brassica plant is merely 60mg kg
-1, be ten sixths of the plumbous enriching quantity of hairy knotweed herb or root.It is thus clear that hairy knotweed herb or root has extremely strong accumulation ability to lead.
Embodiment 2
This test is carried out in the GuangZhou, Guangdong Province city, is pot experiment.The control soil lead content is 46mg kg
-1, be lower than the Pb content threshold limit value (Pb≤50mg.kg of national food agricultural produce home environment quality standard (HJ 332-2006)
-1).Test soil is established 3 plumbous concentration of treatment, and the low plumbous P in soil b content of handling is 488mg kg
-1, be lower than the Pb content threshold limit value (Pb≤500mg.kg-1) of three grades of soil in the soil environment quality standard (GB 15618-1995).The middle plumbous P in soil b content of handling is 998mg.kg
-1, be 2 times of three grades of soil standards.The high plumbous Pb content of handling is 3103mg kg
-1, near industrial pollution district or mining area Pb contaminated soil.Implantation time is 2009.The branch of clip 5cm left and right sides hairy knotweed herb or root, diameter 25cm is gone in cuttage, in the flowerpot of high 12cm, every basin 5 strains.The back final singling of two weeks, every basin keeps 3 strains.Regularly water the sampling after 60 days of growing according to growth needs.
Result of the test shows that under the control case, the average biomass of hairy knotweed herb or root is 55g pot
-1, and the average biomass under basic, normal, high plumbous the processing is respectively 55,62 and 56g pot
-1, be respectively 100%, 113% and 102% of contrast.It is thus clear that hairy knotweed herb or root has extremely strong patience to lead.
High plumbous the processing down, the hairy knotweed herb or root blade of results and the lead content of stolon are respectively 39mg Kg for the first time
-1With 617mg Kg
-1, after-crop be respectively 92mg kg
-1With 1555mg kg
-1It is thus clear that hairy knotweed herb or root mainly is accumulated in lead in the stolon.Continue growth down, hairy knotweed herb or root significantly increases the accumulation of Pb, and its accumulation ability to Pb is not affected.It is thus clear that behind the plantation hairy knotweed herb or root, gather continuously its overground part and part stolon can constantly reduce the lead content in the soil, the lead content in soil is reduced to National standard.
Claims (10)
1. the method for remediating lead-contaminated soil or water body is characterized in that being to use hairy knotweed herb or root to repair, and said method comprises the steps: that (1) gather hairy knotweed herb or root; (2) getting hairy knotweed herb or root plants in soil or water body; (3) hairy knotweed herb or root on periodical reaping ground or water body top and part stolon; (4) continue plantation, harvesting hairy knotweed herb or root, the lead content in soil or water body reaches safety standard; (5) hairy knotweed herb or root with harvesting carries out harmless treatment.
2. according to the method for said remediating lead-contaminated soil of claim 1 or water body, it is characterized in that hairy knotweed herb or root is the hairy knotweed herb or root of growing under the natural conditions described in the step (1).
3. according to the method for said remediating lead-contaminated soil of claim 1 or water body, it is characterized in that hairy knotweed herb or root branch described in the step (2) soaks 1～3h No. 2 with 30ppm ABT root-inducing powder before cuttage, treat that it grows tangible root system and carries out cuttage again.
4. according to the method for said remediating lead-contaminated soil of claim 1 or water body, it is characterized in that hairy knotweed herb or root branch described in the step (2) was soaked in water or the Hoagland nutrient solution 2～4 days, treated that it grows tangible root system and carries out cuttage again.
5. according to the method for said remediating lead-contaminated soil of claim 1 or water body, it is characterized in that in the step (2), when repair be the shallow water area of lead contamination water body the time, with the hairy knotweed herb or root branch cutting of intercepting in the water body shallow water area; When repair be the deepwater regions of lead contamination water body the time, in the water body deepwater regions floating bed is set, and punching on floating bed, the hairy knotweed herb or root branch is inserted in the hole.
6. according to the method for said remediating lead-contaminated soil of claim 5 or water body, it is characterized in that said floating bed is the polyvinyl chloride foam plate.
7. according to the method for said remediating lead-contaminated soil of claim 1 or water body, when it is characterized in that hairy knotweed herb or root and the part stolon on periodical reaping ground described in the step (3) or water body top, reserve part stolon in every 10cm * 10cm scope.
8. according to the method for said remediating lead-contaminated soil of claim 1 or water body, it is characterized in that in the step (4) that said harvesting is harvesting in every month spring 1 time, per 2～3 months of all the other seasons, harvesting was 1 time.
9. according to the method for said remediating lead-contaminated soil of claim 1 or water body, it is characterized in that harmless treatment is that the hairy knotweed herb or root plant is burned described in the step (5), perhaps turn over and be embedded in the tailing dam of heavy metal mining area.
10. according to the method for any said remediating lead-contaminated soil of claim or water body in the claim 1～4,7～9; It is characterized in that when repair be lead-contaminated soil the time; Before the plantation hairy knotweed herb or root, in soil, apply base manure, in growth course, topdress.
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| CN2010102047752A CN101850359B (en) | 2010-06-18 | 2010-06-18 | Method for remediating lead-contaminated soil or water |
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| CN2010102047752A CN101850359B (en) | 2010-06-18 | 2010-06-18 | Method for remediating lead-contaminated soil or water |
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| CN101850359B true CN101850359B (en) | 2012-11-14 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102125928B (en) * | 2011-01-24 | 2012-11-21 | 四川农业大学 | Application of polygonum runcinatum to remediation of soil contaminated by heavy metals mainly comprising cadmium, zinc, lead and copper |
| CN102423768A (en) * | 2011-11-24 | 2012-04-25 | 福建农林大学 | Method for repairing Pb pollution in soil |
| CN104710016B (en) * | 2015-04-02 | 2017-03-01 | 广西科学院 | A kind of method going heavy metal in eliminating water using Properties of Mangrove Seedlings |
| CN109429603B (en) * | 2018-10-24 | 2021-09-07 | 湖北省烟草公司宜昌市公司 | Method for improving tobacco field soil by using polygonum hydropiper as green manure |
| CN109821886A (en) * | 2018-12-30 | 2019-05-31 | 广州草木蕃环境科技有限公司 | A kind of plant restoration method of Tailings Dam |
| CN110479758A (en) * | 2019-07-09 | 2019-11-22 | 江苏大学 | A kind of ecological method handling nitrate pollution under different niches using amphibious plant Alternanthera philoxeroides |
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|---|---|---|---|---|
| CN1465449A (en) * | 2002-07-05 | 2004-01-07 | 束文圣 | Use of violet in repairing lead and cadmium polluted soil and water and culturing method |
| CN101096033A (en) * | 2007-05-29 | 2008-01-02 | 中山大学 | Method for restoring cadmium polluted soil by using amaranth |
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2010
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1465449A (en) * | 2002-07-05 | 2004-01-07 | 束文圣 | Use of violet in repairing lead and cadmium polluted soil and water and culturing method |
| CN101096033A (en) * | 2007-05-29 | 2008-01-02 | 中山大学 | Method for restoring cadmium polluted soil by using amaranth |
Non-Patent Citations (2)
| Title |
|---|
| 李红艳.酸模、戟叶酸模和小头蓼对某些无机污染物的吸收研究.《中国优秀硕士学位论文全文数据库(电子期刊)》.浙江大学,2004,第2004卷(第03期),第7页第15-28行，第14页第18-29行，第15页第5-15行. |
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