CN102935446A - Method for repairing cooper contaminated soil by using three copper resistance flower plants - Google Patents
Method for repairing cooper contaminated soil by using three copper resistance flower plants Download PDFInfo
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- CN102935446A CN102935446A CN2012103984770A CN201210398477A CN102935446A CN 102935446 A CN102935446 A CN 102935446A CN 2012103984770 A CN2012103984770 A CN 2012103984770A CN 201210398477 A CN201210398477 A CN 201210398477A CN 102935446 A CN102935446 A CN 102935446A
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Abstract
The present invention discloses a method for repairing cooper contaminated soil by using three copper resistance flower plants, and belongs to the technical field of contaminated soil plant repair. According to the method, tagetes patula, garden balsam flower and tuberous sword fern rhizome are planted on cooper contaminated soil, a large amount of cooper is absorbed from the cooper contaminated soil through root systems of the three flowers, and is transferred to the overground part, the plants are harvested and then are sold or subjected to resource utilization, and operations of a plurality of the repair period are repeated to remove copper contamination in the soil. The method has the following beneficial effects that: characteristics of simple process and low cost are provided; physical and chemical properties of the soil are not destroyed, and no secondary pollution is generated; and a good copper contaminated soil repair effect is good, the method is applicable for a large area of copper contaminated soil, and can concurrently provide effects of environment copper contamination treatment and environment beautification, and the harvested plants can be sold to different places or subjected to a centralized plant material resource utilization so as to obtain a certain economic benefit.
Description
Technical field
The invention belongs to the phytoremediation technology field of contaminated soil, relate to a kind of method of utilizing three kinds of copper patience flower plants to repair copper polluted soil.
Background technology
Phytoremediation is one of effective way that solves the copper polluted soil problem, and the screening of hyperaccumulative plant or enriching plant is the precondition that phytoremediation technology is implemented.Though found that more than 400 plant hyperaccumulative plant at present, the Cu hyperaccumulative plant of also identifying according to the field acquisition sample only has 25 kinds, and kind is very limited, and these Cu hyperaccumulative plants mainly are distributed in the copper mine band of African Zaire and Zambia.Therefore, finding and screen new Cu hyperaccumulative plant or enriching plant, is one of problem demanding prompt solution in the Cu polluted soil phyto reparation research.In the past, the screening hyperaccumulative plant mainly was to determine to heavy metal pollution comparatively serious mining area and surrounding area sampling analysis, thereby not seek hyperaccumulative plant in the growing environment when other hyperaccumulative plant is found be theoretic a kind of breakthrough; Simultaneously, the hyperaccumulative plant of seeking in the past seldom has ornamental value and economic benefit as flower plant, thereby seeks hyperaccumulative plant and will open up a new approach for phytoremediation from flower plant.At present, the flower plant recovery technique research of heavy-metal contaminated soil still is in the starting stage, and does not tire out the relevant report of flower plant about the Cu ultraproduct.
Along with increasing that exploitation and the smelting of copper, the long-term use that contains the Cu pesticide and sewage sludge are irrigated, the Cu Pollution in Soil degree is increasingly sharpened, the stable and human safety of the serious threat ecosystem.Phytoremediation is one of effective way that solves the copper polluted soil problem, and the screening of hyperaccumulative plant or enriching plant is the precondition that phytoremediation technology is implemented.
Elsholtzia splendens has been reported in existing many researchs both at home and abroad, and the plants such as garden sorrel, microcephaly's knotweed, pale reddish brown elscholtiza, dayflower and Mi Mao fern have restraining oneself and accumulation ability in various degree to Cu.But do not tire out the relevant report of flower plant about the Cu ultraproduct.China is vast in territory, the flower plant aboundresources, if filter out the tired flower plant of ultraproduct of copper polluted soil being repaired significant and effect in the various Of Flower Resources of can be never contaminated by heavy metals serious mining area and species, then will open up a new approach for phytoremediation.
At present, the flower plant recovery technique research of heavy-metal contaminated soil still is in the starting stage.Study enrichment, the migration situation of the heavy metal element lead in the mud in several flower plants such as the favorable to the people grade of horse, inquired into the possibility with the flower plant restoration of soil polluted by heavy metal.In fact, possess following peculiar advantage take flower plant as screening hyperaccumulative plant object: 1) Of Flower Resources quite enriches, has a high potential, and this just makes screening operation that solid foundation has been arranged; When 2) carrying out soil remediation, can beautify the environment, kill two birds with one stone; 3) flowers belong to ornamental plant, can not enter food chain, can reduce the harm to human body; 4) flowers also have certain effect to human health, can be antibiotic such as flowers aromatic oil, improve body immunity, and can be used as health food or be used for the treatment of disease; 5) the human experiences such as breed breeding, flower culture and the prevention and control of plant diseases, pest control of enriching that in long-term production practices, accumulated.6) many flower plants have suitable patience and accumulation property to pollutant, and this provides foundation for the possibility that flower plant is applied to the contaminated soil reparation.Such as Wang Xiaofei and Liu Jianv etc. the Preliminary screening of flowers hyperaccumulative plant be studies show that, 4 kinds of flower plants of the hollyhock of the balsamine of Balsaminaceae, the pot marigold of composite family, four-o'clock, Malvaceae show very strong patience and accumulation property to heavy metal Cd, Pb Single Pollution and Cd-Pb combined pollution.In sum, the screening rehabilitation plant is feasible from flowers.Use the environment of flower plant repairing heavy metal pollution, should have important theory and practice meaning.
Also utilize hyperaccumulative plant such as Commelina communis, elsholtzia splendens etc. to repair copper polluted soil in the prior art, although the repairing effect of hyperaccumulative plant is better than the tired flower plant of non-ultraproduct, maidenhair, balsamine, tuber fern through experimental verification at 800 mg kg
-1Copper polluted soil equal energy normal growth is also finished its life cycle, does not have significant difference between its upperground part biomass and contrast, illustrates that it has higher patience; Experiment shows that also overground part and the root of maidenhair, balsamine and 3 kinds of flower plants of tuber fern all accumulated relatively large copper, shows that they have certain copper accumulation ability, and these show that all they have the potentiality that larger reparation copper pollutes.In addition, they or ornamental flower plant, copper can be beautified the environment when polluting in rehabilitating soil, can have certain economic benefit with sale of finished goods or recycling.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method of utilizing three kinds of copper patience flower plants to repair copper polluted soil.The present invention is achieved by the following technical solutions: plant maidenhair, balsamine and tuber fern at copper polluted soil, absorb a large amount of copper and shift to aerial part from contaminated soil by the root systems of maidenhair, balsamine and three kinds of flowers of tuber fern, results plant and with its sale or recycling is repeated the copper that the operation of above-mentioned some repairing efficiencies removes in the soil and pollutes.
Further, the step of described plantation maidenhair, balsamine and tuber fern is as follows: in spring 3, April, maidenhair and balsamine are sowed respectively, sowing should be adopted loose seedling medium, hole plate seedling growth, sterile-processed, after planting cover slightly, be transplanted in the copper polluted soil when treating true leaf 5-6 sheet; Tuber fern adopts division propagation, the plant division time is identical with front two kinds of flowers, plant division method: maternal plant is taken out in flowerpot, shake off unnecessary basin soil, dish knot root system is together separated as much as possible, it is cut into open two strains or more than two strains with sharp pocket knife, each strain that branches away all will be with suitable root system, and its blade suitably pruned, dress basin sterilization: the little strain that minute cuts off is soaked in 1500 times of liquid of Bravo after five minutes behind the taking-up airing, be transplanted in the copper polluted soil management after the plant division: filling root or water once permeable after the plant division, after the plant division 3～4 will be controlled in week and water, in order to avoid mashed root.
Further, use the composite fertilizer that promotes maidenhair, balsamine and 3 kinds of flower growths of tuber fern according to soil fertility to be repaired.
The invention has the beneficial effects as follows have small investment, quantities is little, specification requirement advantages of higher not; And as a kind of green in-situ recovery technique, the plant of gathering in the crops can not cause secondary pollution by focusing on; The process of repairing simultaneously not only can the spoiled soil ecological environment, also helps to improve the soil degradation and the productivity that cause because of heavy metal pollution and descends, and recovers and improves its bio-diversity.As a kind of ornamental flower and economic plants, plantation maidenhair, balsamine and tuber fern also can play the effect of beautifying the environment when environment copper pollutes administering, and the institute plant of gathering in the crops is by being sold to the strange land or concentratedly carrying out the vegetable material recycling and obtain certain economic benefit.
Description of drawings
Fig. 1 is the strong but the upperground part biomass (g/ strain) of the flowers that accumulation ability is weak of Cu patience of the present invention;
Fig. 2 is the Cu accumulation characteristic of 3 kinds of flowers of the present invention.
The specific embodiment
The potted plant experiment place is located in the Jining City in Shandong Province Qufu Normal University experiment greenhouse, does not have pollution sources around this experimental site, is the uncontaminated district of heavy metal, belongs to warm temperate zone monsoon continental climate weather.Experiment with soil pick up from Jining City in Shandong Province Qufu Normal University (geographical position be 116 ° 96 of east longitude ', north latitude 35-degree 59 ') farmland in west (for the pollution-free area) table soil (0 –, 20 cm), soil types is cinnamon soil, its basic physical and chemical is: pH value 7.5, the content of organic matter 0.99%, full N amount is 0.0875%, total Cu content 19.73 mgkg
-1
Carry out flower seedling raising at the beginning of 2010 3 months, program request maidenhair and I.balsamina L.seeds in seedling medium keep ground moistening, treat about height of seedling 8cm, contain 5-6 sheet true leaf, select the consistent maidenhair of growing way and balsamine seedling replanting and enter plastic tub (diameter
Ф=20 cm, H=15 cm) in; Tuber fern then adopts the method for division propagation, plant division method: maternal plant is taken out in flowerpot, shake off unnecessary basin soil, dish knot root system is together separated as much as possible, it is cut into open two strains or more than two strains with sharp pocket knife, each strain that branches away all will be with suitable root system, and its blade is suitably pruned, dress basin sterilization: the little strain that minute cuts off is soaked in 1500 times of liquid of Bravo after five minutes behind the taking-up airing, be transplanted in the copper polluted soil.Plastic tub has filled native 1kg/ basin before this, and sneaks into solid-state CuSO
4.5H
2O, and Cu pollution concentration for the treatment of is made as 800 mg kg
-1, be equivalent to 2 times of national soil Cu environmental quality grade III Standard, balance one month.
Maidenhair, balsamine and tuber fern are gathered in the crops after growing into florescence or maturity period.To gather in the crops sample and be divided into root, stem and leaf 3 parts, and fully wash to remove earth and the dirt that adheres on the plant sample with running water respectively, and then use deionized water rinsing, drain moisture, at 105 ℃ of 30min that complete; Then dry to constant weight under 70 ℃, weigh up the dry weight of every Plants each several part with electronic analytical balance, the plant sample after weighing is pulverized for subsequent use.The mensuration of Cu constituent content in the plant sample: use its HNO
3-HClO
4Mixed liquor disappears and boils
[31], HCl dissolving, constant volume, atomic absorption spectrophotometer (AAS) is measured the content of Cu element.
Experimental result is as follows:
Experiment shows: maidenhair, balsamine and tuber fern are at copper pollution concentration 800 mg kg
-1All its life cycle can be finished, florescence can be arrived; Fig. 1 shows between the upperground part biomass (dry weight) of maidenhair, balsamine and 3 kinds of flowers crops of tuber fern and the contrast the difference without obvious (p〉0.05), shows stronger patience.
Studies show that (Fig. 2) although the concentration coefficient of maidenhair, balsamine and 3 kinds of flower plants of tuber fern and transfer ratio all less than 1, and overground part copper content also surpasses the desired critical content 1000 mg kg of hyperaccumulative plant
-1Standard, namely do not meet the standard of hyperaccumulative plant, but plant absorbing coefficient of discharge (AC) (refers within growth period, the ratio of this yuan content in the pollution element total amount that plant shoot divides absorption and the soil) is respectively 0.744,0.516 and 0.496, can be higher if calculate the uptake coefficient of root, show that these 3 kinds of flower plants of maidenhair, balsamine and tuber fern still have larger accumulation ability to copper, belong to the copper enriching plant, thereby illustrate that also there is larger reparative potential in they to the copper pollution.
The above person is preferred embodiment of the present invention only, is not to limit practical range of the present invention, and namely all equalizations of doing according to the present invention change and modify, and are all claim scope of the present invention and contain, and give an example no longer one by one here.
Claims (3)
1. method of utilizing three kinds of copper patience flower plants to repair copper polluted soils, it is characterized in that: plant maidenhair, balsamine and tuber fern at copper polluted soil, absorb a large amount of copper and shift to aerial part from contaminated soil by the root systems of maidenhair, balsamine and three kinds of flowers of tuber fern, results plant and with its sale or recycling is repeated the copper that the operation of above-mentioned some repairing efficiencies removes in the soil and pollutes.
2. the method for utilizing three kinds of copper patience flower plants to repair copper polluted soils according to claim 1, the step that it is characterized in that described plantation maidenhair, balsamine and tuber fern is as follows: in spring 3, April, maidenhair and balsamine are sowed respectively, sowing should be adopted loose seedling medium, hole plate seedling growth, sterile-processed, after planting cover slightly, be transplanted in the copper polluted soil when treating true leaf 5-6 sheet; Tuber fern adopts division propagation, the plant division time is identical with front two kinds of flowers, plant division method: maternal plant is taken out in flowerpot, shake off unnecessary basin soil, dish knot root system is together separated as much as possible, it is cut into open two strains or more than two strains with sharp pocket knife, each strain that branches away all will be with suitable root system, and its blade suitably pruned, dress basin sterilization: the little strain that minute cuts off is soaked in 1500 times of liquid of Bravo after five minutes behind the taking-up airing, be transplanted in the copper polluted soil management after the plant division: filling root or water once permeable after the plant division, after the plant division 3～4 will be controlled in week and water, in order to avoid mashed root.
3. the method for utilizing three kinds of copper patience flower plants to repair copper polluted soil according to claim 1 is characterized in that using the composite fertilizer that promotes maidenhair, balsamine and 3 kinds of flower growths of tuber fern according to soil fertility to be repaired.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107398469A (en) * | 2017-09-26 | 2017-11-28 | 湖南匡楚科技有限公司 | A kind of method using complementary plant in treating heavy-metal contaminated soil |
| CN110252800A (en) * | 2019-07-08 | 2019-09-20 | 广西博世科环保科技股份有限公司 | A method of utilizing essential oil class phytoremediation heavy metal pollution farming land |
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Patent Citations (1)
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| CN101462119A (en) * | 2007-12-19 | 2009-06-24 | 中国科学院沈阳应用生态研究所 | Method for repairing and treating soil with cadmium pollution using flowering plant Indian marigold |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107398469A (en) * | 2017-09-26 | 2017-11-28 | 湖南匡楚科技有限公司 | A kind of method using complementary plant in treating heavy-metal contaminated soil |
| CN110252800A (en) * | 2019-07-08 | 2019-09-20 | 广西博世科环保科技股份有限公司 | A method of utilizing essential oil class phytoremediation heavy metal pollution farming land |
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Application publication date: 20130220 |