CN103949465B - The application of Chinese lantern in remediating heavy metal lead-contaminated soil - Google Patents
The application of Chinese lantern in remediating heavy metal lead-contaminated soil Download PDFInfo
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- CN103949465B CN103949465B CN201410190012.5A CN201410190012A CN103949465B CN 103949465 B CN103949465 B CN 103949465B CN 201410190012 A CN201410190012 A CN 201410190012A CN 103949465 B CN103949465 B CN 103949465B
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Abstract
The invention discloses the application of Chinese lantern in remediating heavy metal lead-contaminated soil, its method is specially in heavy metal lead contaminated soil and plants Chinese lantern, after Chinese lantern maturation, gather in the crops, remove from heavy metal lead contaminated soil by Chinese lantern aerial part or with the whole strain of under ground portion, Chinese lantern to results carries out ashing processing, extract heavy metal lead, thereby heavy metal lead contaminated soil is repaired. The present invention have expense cheap, workable, not spoiled soil physicochemical property, do not cause secondary pollution, can efficiently repair by advantages such as heavy metal lead contaminated soils.
Description
Technical field
The present invention relates to the recovery technique field of Heavy Metals In Environment soil, be specifically related to Chinese lantern (Clerodendrumfortunatum) application in remediating heavy metal lead-contaminated soil.
Background technology
Heavy metal pollution of soil is the environmental problem of domestic and international common concern, is a global thorny problem, and produced pollution effect has disguise, chronicity and irreversibility. Pollutant can not be by the degraded such as microorganism in soil and absorbed by crops. Heavy metal passes to human or animal by food chain after the edible part excess accumulation of crop, and human health is brought to serious harm. As world-famous Japanese minamata disease, Itai-itai diseases are exactly typical illustration. How controlling and alleviating pollution and the harm of heavy metal to environment has become a problem becoming increasingly conspicuous, and the soil method of repairing heavy metal pollution has the methods such as physics, chemistry and phytoremediation at present. But physics, chemical method repairing polluted soil have investment expensive, need to and there is the problem of secondary pollution with complicated appointed condition, can not realize large area repair. But phytoremediation has, cost is low, easy to operate, the feature of non-secondary pollution becomes current most popular reparation means. Phytoremediation is mainly that application super enriching plant is removed the heavy metal in soil, super enriching plant kind more than 500 of finding at present, it is mainly nickel super enriching plant, it is less that but plumbous super enriching plant is but reported, the domestic phytoremediation research to heavy metal lead is more, but a kind of plumbous super enriching plant chenopodium ambrosiodies of having found the people such as real super enriching plant is less, rarely seen Wu Shuan peach reported first in 2004, in its body, plumbous mass fraction is up to 3888mg/kg; Hu Zongda etc. find that little squama sedge is a kind of plumbous super enriching plant for 2007, its aerial part to plumbous enrichment content up to 1834.17mg/kg; Liu Yueli etc. have reported that the Pb content in the plants such as brake fern, C. gracile, large fire weed, Ravenna grass, Horseweed Herb and ox eggplant is all greater than 1000mg/kg, has exceeded the Critical Standard of super enriching plant for 2009; The report in 2010 such as Luo Yuyang utilizes indoor controlled pot experiment, and the enriched character of close hair white lotus wormwood artemisia lead is studied, and its overground part is 2857.86mg/kg to maximum Pb accumulation amount.
China's heavy metal lead contaminated soil area is huge, the kind of having reported plumbous super enriching plant is still very limited, be necessary to find more efficiently plumbous enriching plant and carry out repairing polluted soil, the high rarely seen report of plant of enriching quantity in plumbous enriching plant, therefore filter out that more plumbous enriching quantity is high, transhipment coefficient large plant, reparation for heavy metal lead contaminated soil is significant, and very worth going researched and developed.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiency that prior art exists, the application of a kind of Chinese lantern in remediating heavy metal lead-contaminated soil is provided, have expense cheap, workable, not spoiled soil physicochemical property, do not cause secondary pollution, can efficiently repair by features such as heavy metal lead contaminated soils.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
The application of Chinese lantern in remediating heavy metal lead-contaminated soil, in heavy metal lead contaminated soil, plant Chinese lantern, after Chinese lantern maturation, gather in the crops, remove from heavy metal lead contaminated soil by Chinese lantern aerial part or with the whole strain of under ground portion, Chinese lantern to results carries out ashing processing, extract heavy metal lead, thereby heavy metal lead contaminated soil is repaired.
The spacing in the rows of described Chinese lantern remains in the scope of 10cm ~ 30cm; Be preferably 15cm.
In the growth course of described Chinese lantern, water in time, make soil moisture content remain on 50% ~ 90% of field capacity.
Appropriate fertilising in the growth course of described Chinese lantern. Described fertilising can be carried out in conjunction with watering simultaneously.
In heavy metal lead contaminated soil, lead concentration is in the time of 200.0mg/kg ~ 1600.0mg/kg, and Chinese lantern has good repair ability to heavy metal lead contaminated soil, and Chinese lantern do not show any murder by poisoning phenomenon, and the biomass of Chinese lantern does not also affect; In the time that in heavy metal lead contaminated soil, lead concentration is at 800.0mg/kg ~ 1600.0mg/kg, Chinese lantern has good repair ability to heavy metal lead contaminated soil.
Inventor finds by experimental study, Chinese lantern is in the soil of different lead concentrations, and the transhipment coefficient ratio of under ground portion content of beary metal (above-ground plant parts with) is all greater than 1, all exceedes the standard of super enriching plant, in the time that Pb in Soil concentration is 1600mg/kg, transhipment coefficient can reach 1.41.
Chinese lantern increases with the increase of lead concentration in heavy metal lead contaminated soil plumbous enriching quantity; In the time that Pb in Soil concentration is 1600mg/kg, the aerial part of Chinese lantern reaches 5809mg/kg to plumbous enriching quantity.
The implantation methods of described Chinese lantern, for sowing plantation in ground, garden obtains Chinese lantern seedling, reaches after 5mm ~ 15mm until the height of Chinese lantern seedling, then is transplanted in heavy metal lead contaminated soil; Above-mentioned in ground, garden sowing plantation be preferably, in mid-March in spring, the Chinese lantern seed of preserving that dries in the shade is carried out to drilling in whole good garden, cover slightly suppression after one deck fine earth, the maintenance ground moistening that simultaneously waters, can emerge about 10 days; The harvest time of Chinese lantern the best is mid-October.
Compared with prior art, the invention has the advantages that: the present invention carrys out the lead in absorption extraction soil by plant Chinese lantern in heavy metal lead contaminated soil, can permanent solution Lead Pollution in Soil problem. Have expense cheap, repair efficient, workable, not spoiled soil physicochemical property, do not cause the advantages such as secondary pollution; And can also recycle the heavy metal lead of enrichment, thereby produce certain economic benefit.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1:
Forest farm is tested in Hu'nan Prov. Academy of Forest-Sciences in potted plant experiment place, experimental site does not have pollution sources around, it is the uncontaminated district of heavy metal, belong to subtropical zone monsoon moist climate, 17.2 DEG C of Changsha urban area average temperatures of the whole year, year accumulated temperature is 5457 DEG C, 1361.6 millimeters of urban district average annual precipitations, annual average 275 days of frost-free period.
Potted plant soil picks up from free of contamination topsoil in Hu'nan Prov. Academy of Forest-Sciences's test forest farm, and soil types is red soil. With Pb(NO3）2For analyzing pure supply Pb in Soil, establish altogether five lead concentration processing, be respectively 0mg/kg, 200mg/kg, 400mg/kg, 800mg/kg, 1600mg/kg, the processing that wherein lead concentration is 0mg/kg is in contrast. While preparing lead-contaminated soil, by soil sample natural air drying, cross 4mm sieve after removal impurity, pack in the flowerpot that large ting model is consistent, in each flowerpot, soil loading amount is identical, and processes required Pb(NO with each lead concentration of wanting to reach respectively3）2Amount of powder is fully mixed, is mixed thoroughly, and balance is for subsequent use after 15 days. In mid-March, select the healthy and strong Chinese lantern seedling cultivation that is highly about 10cm in the flowerpot of each lead concentration processing, every basin is planted 4 strains, repeats 3 times. Irregularly water according to lack of water situation in basin, keep soil moisture 50% ~ 90%, until mid-October aerial part and the under ground portion of the Chinese lantern plant after maturation are gathered in the crops respectively. Analyze the rear growing state of Chinese lantern plant of results and the lead content of different parts.
The growing state of gathering in the crops rear Chinese lantern plant is analyzed. Add up each lead concentration and process the average plant height of lower Chinese lantern plant; After Chinese lantern plant is cleaned with running water, rinse well by deionized water again, drain moisture, at 105 DEG C of temperature, complete 30 minutes, then dry to constant weight at 70 DEG C of temperature, weigh its dry weight. Table 1 has shown the growing state of the lower Chinese lantern plant of different lead concentrations processing.
Table 1:
| Lead In Soil concentration (mg/kg) | Average plant height (cm) when results | Dry weight (g) |
| 0 | 43.4 | 264.8 |
| 200 | 43.3 | 257.9 |
| 400 | 44.9 | 272.5 |
| 800 | 43.1 | 268.9 |
| 1600 | 44.6 | 270.2 |
Table 1 result shows that the plant height of Chinese lantern plant is not subject to the impact of Pb in Soil concentration, until whens results, the growing state of Chinese lantern is good, and each processing from appearance sees that difference is little mutually without being injured phenomenon and also irregular variation of plant height. Compared with the control, when Pb in Soil concentration is 800mg/kg, Chinese lantern plant is the shortest, and average plant height is 43.1cm, and when Pb in Soil concentration is 400mg/kg, Chinese lantern plant is the highest, and average plant height is 44.9cm; The dry weight of Chinese lantern plant is irregular variation also, illustrates that Pb in Soil concentration does not also have a significant effect to the dry weight of Chinese lantern plant.
Lead content to the different parts of gathering in the crops rear Chinese lantern plant is analyzed. After the aerial part of Chinese lantern and under ground portion are cleaned with running water respectively, rinse well by deionized water again, drain moisture, at 105 DEG C of temperature, complete 30 minutes, then dry to constant weight at 70 DEG C of temperature, then pulverize. Adopt dry ashing method to extract plumbous, the Chinese lantern plant powdered sample taking after 2.0000g pulverizes is placed in porcelain crucible, on hot plate, carry out pre-ashing, after the most of charing of sample, be moved in high-temperature electric resistance furnace, progressively being warming up to 500 DEG C carries out ashing and (if remaining charcoal is more in ash content, after cooling, splashes into several nitric acid (HNO3), be evaporated to dry after, then in high-temperature electric resistance furnace relaying temperature of continuing rising until ashing completely), the ashing time is 12h. Add 3ml hydrochloric acid (HCl) to dissolve the ash that obtains of ashing, filter if desired, be settled to 50ml with distilled water. Soil sample air-dry is crossed 0.25mm sieve, ashing 6h in the high temperature of 550 DEG C, and adding 5ml volume ratio is 1:3(HNO3-HCl) dense Mixed Acids Digestion, dissolve ash content with HCl, filter constant volume, with the content of aas determination lead. Table 2 has shown the plumbous enrichment condition of Chinese lantern plant under different plumbous concentration for the treatment of.
Table 2:
| Lead concentration (mg/kg) | Aerial part mean lead content (mg/kg) | Under ground portion mean lead content (mg/kg) | Concentration coefficient | Transhipment coefficient |
| 0 | 0 | 0 | 0 | 0 |
| 200 | 518 | 424 | 2.36 | 1.22 |
| 400 | 1145 | 987 | 2.67 | 1.16 |
| 800 | 3950 | 2850 | 4.25 | 1.39 |
| 1600 | 5809 | 4126 | 3.10 | 1.41 |
In table, concentration coefficient is plant heavy metal of body content and the ratio of place heavy metal content in soil, and transhipment coefficient is above-ground plant parts and the ratio of under ground portion content of beary metal. As shown in Table 2, along with the increase of heavy metal in soil concentration, the lead content of Chinese lantern aerial part and under ground portion also presents and increases progressively trend, in the time that Pb in Soil concentration is 1600mg/kg, Chinese lantern aerial part lead content reaches 5809mg/kg, and transhipment coefficient also reaches maximum 1.41. In other lead concentrations are processed, transhipment coefficient is also all greater than 1, shows that Chinese lantern has reached the standard of enriching plant, and has good repairing effect. And at present the high-load of the plumbous enriching plant of report is 3888mg/kg, the best concentration effect of Chinese lantern exceeds nearly 50% than the highest enriching quantity of the plumbous enriching plant of having reported at present, and transhipment coefficient is also apparently higher than the plumbous enriching plant of existing report.
From above-described embodiment, Chinese lantern is planted in the serious soil of heavy metal pollution its normal growth without any poisoning phenomenon, its biomass does not also affect, and transhipment coefficient also substantially exceeds the standard of super enriching plant, be a kind of desirable Lead Pollution in Soil bioprosthetic material, lead-contaminated soil is had to stronger repair ability.
Claims (4)
1. the application of Chinese lantern in remediating heavy metal lead-contaminated soil, it is characterized in that: in heavy metal lead contaminated soil, plant Chinese lantern, after Chinese lantern maturation, gather in the crops, remove from heavy metal lead contaminated soil by Chinese lantern aerial part or with the whole strain of under ground portion, Chinese lantern to results carries out ashing processing, extract heavy metal lead, thereby heavy metal lead contaminated soil is repaired; The spacing in the rows of described Chinese lantern remains in the scope of 10cm ~ 30cm; In the growth course of described Chinese lantern, water in time, make soil moisture content remain on 50% ~ 90% of field capacity; In heavy metal lead contaminated soil, lead concentration is in the time of 200.0mg/kg ~ 1600.0mg/kg, and Chinese lantern has good repair ability to heavy metal lead contaminated soil, and Chinese lantern do not show any murder by poisoning phenomenon, and the biomass of Chinese lantern does not also affect.
2. application according to claim 1, is characterized in that: appropriate fertilising in the growth course of described Chinese lantern.
3. application according to claim 1, is characterized in that: Chinese lantern increases with the increase of lead concentration in heavy metal lead contaminated soil plumbous enriching quantity; In the time that Pb in Soil concentration is 1600mg/kg, the aerial part of Chinese lantern reaches 5809mg/kg to plumbous enriching quantity.
4. application according to claim 1, is characterized in that: the implantation methods of described Chinese lantern, for sowing plantation in ground, garden obtains Chinese lantern seedling, reaches after 10mm ~ 15mm until the height of Chinese lantern seedling, then is transplanted in heavy metal lead contaminated soil.
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| CN104550213A (en) * | 2014-12-04 | 2015-04-29 | 辽宁石油化工大学 | Application of chaenomeles speciosa in repairing of lead-contaminated soil |
| CN104889147A (en) * | 2014-12-04 | 2015-09-09 | 辽宁石油化工大学 | Application of Callistephus chinensis in restoration of lead-contaminated soil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1568668A (en) * | 2003-07-16 | 2005-01-26 | 中国科学院沈阳应用生态研究所 | Screening method for heavy metal enriched / accumulated plant |
| 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 |
| CN103433273A (en) * | 2013-08-12 | 2013-12-11 | 四川农业大学 | Application of willow herb to remediation of heavy metal lead pollution in soil |
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| JP4431072B2 (en) * | 2004-03-17 | 2010-03-10 | 国立大学法人東京農工大学 | Purification method for lead-contaminated soil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1568668A (en) * | 2003-07-16 | 2005-01-26 | 中国科学院沈阳应用生态研究所 | Screening method for heavy metal enriched / accumulated plant |
| 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 |
| CN103433273A (en) * | 2013-08-12 | 2013-12-11 | 四川农业大学 | Application of willow herb to remediation of heavy metal lead pollution in soil |
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| Title |
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| 垃圾堆放场主要杂草对重金属的富集特点;曹华英等;《江西农业学报》;20080615;第20卷(第06期);98-100 * |
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