CN101693252B - Application of siegesbeckia herb in remediation of soil contaminated with heavy metal cadmium - Google Patents
Application of siegesbeckia herb in remediation of soil contaminated with heavy metal cadmium Download PDFInfo
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- CN101693252B CN101693252B CN2009103091251A CN200910309125A CN101693252B CN 101693252 B CN101693252 B CN 101693252B CN 2009103091251 A CN2009103091251 A CN 2009103091251A CN 200910309125 A CN200910309125 A CN 200910309125A CN 101693252 B CN101693252 B CN 101693252B
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Abstract
The invention discloses application of feverfew siegesbeckia herb in remediation of soil contaminated with the heavy metal cadmium, which is realized through planting siegesbeckia herb in soil contaminated with the heavy metal cadmium. The siegesbeckia herb has an excellent property of accumulating the heavy metal cadmium, can absorb and accumulate the heavy metal cadmium, and transfer most of the heavy metal cadmium above the ground in order to realize remediation of soil contaminated with the heavy metal cadmium through being planted in the soil. The invention not only has the characteristics of low cost and strong operability because the siegesbeckia herb needs no special treatment during the growing process but also can increase the remediation effect of heavy metal in soil of unit area because the siegesbeckia herb has a large quantity, and develops a new plant resource applied for plant remediation of soil contaminated with heavy metal.
Description
Technical field
The present invention relates to the recovery technique field of heavy metal pollution in the environment, the especially application of a plant pig Xian in the repairing heavy metal in soil cadmium pollution.
Background technology
Heavy metal cadmium in the environment (Cd) pollutes and has characteristics such as disguise, chronicity and irreversibility, its pollutant poor mobility, holdup time in medium are grown, can not be degraded by microorganisms, also can influence human health the most at last, cause immeasurable influence through approach such as food chain transmission.World-shaking Japanese Itai-itai diseases incident is polluted by the cadmium element in the soil and is caused.Therefore, cadmium pollution soil is badly in need of administering.
Utilizing heavy metal accumulation plant or super enriching plant (hyperaccumulator) to carry out phytoremediation is one of research focus of current environmental science, it has small investment, efficient height, and do not cause multifrequency natures such as secondary pollution, in the remediating heavy metal soil pollution, shown great potentiality.Enriching plant or hyperaccumulative plant mostly are gathered in the field in group's mode, mainly in the mine district, the mineralization band, be rich in the metallic element rock decay and form on the soil.Therefore, abandoned mine or metallic ore being appeared that the plant that goes up self-sow investigates is one of effective way of seeking enriching plant or hyperaccumulative plant.
The cadmium hyperaccumulative plant of finding is more rare at present, comprises a few plant that penny cress belongs to; The enriching plant of cadmium has been found vetiver, ramie, black nightshade, little liquor, a bur beggar-ticks etc., and single and combined pollution all has stronger patience and accumulation ability to cadmium for they.But at present most of cadmium enriching plant poor growths of finding, plant is short and small, the upperground part biomass is little etc., be restricted in actual applications.Therefore, seeking other cadmium enriching plants to overcome existing rehabilitation plant poor growth, the short and small shortcoming of plant, cultivate the kind that growth is rapid, plant is high, biomass is big, is cadmium pollution soil phytoremediation technology problem demanding prompt solution.
Meanwhile, along with the development of industrial and agricultural production, Cadmium Pollution in Soils is the situation that increases the weight of, and especially agricultural soil cadmium pollution situation is troubling.And the plant variety resource that can be used for the cadmium pollution soil reparation at present is difficult to satisfy actual needs, suddenly treats further research and enlarges available resources.In addition, plant resources is quite abundant on the earth, determine which plant whether have corresponding enriched character to cadmium, needs a large amount of human and material resources of cost and financial resources, also may not just the plant variety that suits the requirements be can filter out, thereby the efficient and the application of phytoremediation restricted.
(Latin is by name for pig Xian
Siegesbeckia orientalisL.) draft a document this plant for Ju Ke pig Xian, main product in the Hunan, ground such as Fujian, Jiangsu, Zhejiang, Hubei, Sichuan.Its herb has the rheumatism of dispeling, strong muscles and bones, effect such as clearing heat and detoxicating.
Summary of the invention
The inventor is in the research work of being engaged in the heavy metal pollution reparation, and after the heavy metal accumulation plants such as the existing slenderstalk dicranostigma herb of secondary, wild crowndaisy chrysanthemum, find once more: the pig Xian of chrysanthemum section genus is planted thing pig Xian, and (Latin is by name
Siegesbeckia orientalisL.), the cadmium heavy metal in the soil environment had significant enriched character.Therefore, purpose of the present invention is exactly the problem that can be used for the plant variety inadequate resource of heavy metal pollution of soil biological restoration at above-mentioned, and a kind of new application of Zhi article Zhong pig Xian in the repairing heavy metal in soil cadmium pollution is provided.
In order to realize the foregoing invention purpose, the technical solution used in the present invention is as follows:
The application ， of pig Xian in the rehabilitating soil cadmium pollution Jiang pig Xian (
Siegesbeckia orientalisL.) plant in the soil of heavy metal cadmium, plantation De pig Xian is carried out the aerial part of periodical reaping plant.Tong Guo Radix siegesbeckiae system absorbs the Cd in the contaminated soil in a large number, and it is transferred to overground part organs such as stem and leaf, thereby realizes removing the purpose of pollutant in soil heavy metal Cd.
The vitality of pig Xian is very vigorous, is easy to survive, and can directly transplant or seed sowing be grown; Can survive under field conditions (factors), in its whole growth process, not need to carry out special management.
Treat can carry out periodical reaping when aerial part forms certain biomass, heavy metal Cd is along with the harvesting of aerial part is removed in a large number.Its seed natural propagation growth is quick, but the yet continued growth of toothing part does not need annual plantation, can effectively reduce the content of Cd in the contaminated soil, thus repairing polluted soil.
Zhong De pig Xian of the present invention (
Siegesbeckia orientalisL.), for Ju Ke pig Xian belongs to the annual herb plant,, prove that it mainly has enriched character to cadmium (Cd) heavy metal through experimental study.The present invention makes full use of the enriched character of pig Xian to the Cd heavy metal, with its seedling replanting or with its seed sowing to by in the soil of heavy metal cadmium, Cd heavy metal in the absorption and accumulation contaminated soil, and its major part is transported to aerial part, reduce the content of Cd in the soil, when treating that aerial part forms certain biomass, but the toothing harvesting extract continuously, thereby reach the purpose that reduces Cd content in the contaminated soil.
Compared with prior art, the invention has the beneficial effects as follows:
The inventor finds that by experimental study pig Xian has significant enriched character to heavy metal cadmium.The present invention is sharp just to plant it in cadmium pollution soil with this enriched character of pig Xian to heavy metal cadmium, but the absorption and accumulation heavy metal cadmium, and its major part is transported to aerial part, to reach the purpose of repairing polluted soil.And the vitality of You Yu pig Xian is very vigorous, is easy to survive, and all do not need to carry out special management in its whole growth process, thereby cost is lower, workable; With the time pig Xian individual biomass big, can improve unit are heavy metal-polluted soil remediation efficiency, for the phytoremediation of heavy-metal contaminated soil has been developed new plant resource variety.
Description of drawings
Fig. 1 is different Cd concentration treatment conditions Xia pig Xian the upperground part biomass among the embodiment.
The specific embodiment
The present invention is described in further detail below in conjunction with the specific embodiment.
But this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following embodiment.
Embodiment 1
The application of present embodiment Wei pig Xian in the repairing heavy metal in soil cadmium pollution:
Test site is located at soil and fertilizer experiment station, Sichuan Agricultural University teaching and scientific research farm.
Adopt the method for potted plant simulated soil heavy metal pollution, with Ju Ke pig Xian Shu Zhi Wu pig Xian (
Siegesbeckia orientalisL.) plant in adding the potted plant soil that the gradient concentration heavy metal cadmium crosses, adopt transplanting method, pig Xian seedling replanting is grown in potted plant; Carry out the aerial part of toothing harvesting plant after 85 days, survey the wherein weight percentage of heavy metal Cd.
8 processing are established in test altogether, are respectively CK(and do not add Cd) the different concentration that add with 7 test, and adding concentration is 10 mg kg
-1(T1), 30 mg kg
-1(T2), 60 mg kg
-1(T3), 90 mg kg
-1(T4), 120 mg kg
-1(T5), 150mg kg
-1(T6), 180mg kg
-1(T7), the heavy metal form that adds is CdCl
25H
2O is AR, joins in the soil with solid-state, abundant mixing, and the back is stand-by around the balance.
This was tested spring, and Yi Zai pig Xian seedling is the atavism seedling that picks up from mining area, Dardo County south, state, Ganzi, Sichuan Province, 6 in every basin, 3 repetitions.In the solarium, cultivate, irregularly water according to the soil moisture actual conditions and guarantee that soil moisture remains on about 80% of field capacity, treat to gather in the crops the heavy metal cadmium content of measuring wherein after the plant maturation.
Result of the test is as follows:
Fig. 1 is different Cd concentration treatment conditions Xia pig Xian the upperground part biomass.The least significant difference method significance of difference the analysis showed that it is 10,30,60 mg kg that Cd adds concentration
-1Processing in, the upperground part biomass compared with the control, there was no significant difference (
P＜0.05), shows stronger patience.But pollute under the processing horizontal at higher Cd, promptly add concentration greater than 90 mg kg
-1After, the upperground part biomass descend to some extent (
P＜0.05), though it is strong but certain limit is arranged to Shuo Ming pig Xian patience, in Cd concentration greater than 90 mg kg
-1After, the growth of plant can be suppressed.
The Cd assay the results are shown in following table 1 in the plant:
Table 1. different disposal Nong Du Xia pig Xian is to the enrichment characteristics of cadmium
TF is a transfer ratio, and BCF is a concentration coefficient
Table 1 is the result show, cadmium adds concentration in that T1～T7 concentration Shi ， pig Xian overground part concentration coefficient is all greater than 1 in the soil, and transfer ratio is also all greater than 1, and adding concentration in soil is 60 mg kg
-1The time, plant overground part content is greater than 100 mg kg
-1, reached the critical standard of super enriching plant content, and in the plant body cadmium content with adding increasing and increasing of concentration.
Zong He pig Xian is the super enriching plant of cadmium to the patience and the enrichment characteristics ， pig Xian of cadmium, and the Cd contaminated soil is had stronger repair ability.
Claims (2)
1. the application of pig Xian in the repairing heavy metal in soil cadmium pollution is characterized in that: pig Xian kind is planted in the soil of heavy metal cadmium, the pig Xian of plantation is carried out the aerial part of periodical reaping plant.
2. application according to claim 1 is characterized in that: with Suo Shu De pig Xian directly transplant, Huo plants pig Xian seed sowing in the soil of heavy metal cadmium.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009103091251A CN101693252B (en) | 2009-10-30 | 2009-10-30 | Application of siegesbeckia herb in remediation of soil contaminated with heavy metal cadmium |
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| CN2009103091251A CN101693252B (en) | 2009-10-30 | 2009-10-30 | Application of siegesbeckia herb in remediation of soil contaminated with heavy metal cadmium |
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| CN101693252A CN101693252A (en) | 2010-04-14 |
| CN101693252B true CN101693252B (en) | 2011-04-27 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101954372A (en) * | 2010-09-14 | 2011-01-26 | 南京农业大学 | Application of jerusalem artichokes in repairing cadmium (Cd) polluted environment |
| CN102172608B (en) * | 2011-01-24 | 2012-07-04 | 四川农业大学 | Application of artemisia stolonifera in repairing of heavy metal cadmium polluted soil |
| CN102814319B (en) * | 2012-03-01 | 2013-06-19 | 四川农业大学 | Application of nitrilotriacetic acid for reinforcing capability of siegesbeckia orientalis in restoring cadmium-polluted soil |
| CN103071669B (en) * | 2013-01-08 | 2014-03-05 | 华东师范大学 | Method for soil heavy metal pollution remediation through grass family with enrichment capacity |
| CN103143559A (en) * | 2013-04-02 | 2013-06-12 | 艾特克控股集团有限公司 | Method for remediation of heavy metal contaminated soil |
| CN103736721B (en) * | 2014-01-23 | 2016-07-13 | 雷学军 | Method by biological restoration water body with soil and comprehensive utilization of resources |
| CN105290092A (en) * | 2014-10-21 | 2016-02-03 | 苗庆龄 | Method for remediating heavy metal polluted soil comprehensively |
| CN109772880A (en) * | 2019-02-27 | 2019-05-21 | 广西壮族自治区农业科学院 | Application of eight king of river in remediating heavy metal cadmium zinc-copper lead-contaminated soil |
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