CN101704016A - Phytochemically combined remediation technology for soil contaminated by heavy metals, Mn, Pb, Cr and Zn - Google Patents
Phytochemically combined remediation technology for soil contaminated by heavy metals, Mn, Pb, Cr and Zn Download PDFInfo
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- CN101704016A CN101704016A CN200910198915A CN200910198915A CN101704016A CN 101704016 A CN101704016 A CN 101704016A CN 200910198915 A CN200910198915 A CN 200910198915A CN 200910198915 A CN200910198915 A CN 200910198915A CN 101704016 A CN101704016 A CN 101704016A
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Abstract
The invention discloses phytochemically combined remediation technology for soil contaminated by heavy metals, Mn, Pb, Cr and Zn, which remedies the soil contaminated by the heavy metals by applying pokeberry root and chelating agent and comprises the following steps of: seeding the pokeberry root in the soil contaminated by the heavy metals and irrigating chelating agent EDTA solution in the soil in the growth metaphase of the pokeberry root, wherein the concentration of the chelating agent EDTA solution is 500 to 1,000mg/kg. After the pokeberry root is planted continuously for 2 to 3 years, the soil can be used for agriculture.
Description
Technical field
The present invention relates to a heavy metal species soil remediation technology, particularly relate to a kind of technology of Phytochemistry renovation of heavy metal polluted soil with combined.
Background technology
Along with development of industry and agriculture, " three wastes " pollute serious day by day, particularly a large amount of release severe contaminations of heavy metal soil, water body and atmosphere.After soil was subjected to heavy metal pollution, heavy metal element can enter human body by all means, is detrimental to health.Soil receives and is difficult to after the heavy metal pollution eliminate in the short time again, and can enrichment in food chain, become the significant problem that threatens human health.At serious day by day heavy metal pollution at present, the prophylactico-therapeutic measures that people take mainly comprises:
Physics method: casting, soil removal and replacement, go measures such as table soil, soil moved in to improve the original, deep ploughing are digged, high-temperature process soil, but the quantities of these measures is big, costly.Chemical method: add modifying agent (inhibitor), apply heavy metal chelant, use heavy metal antagonist, these measures can play a role, but no matter utilize chemical reagent fixedly or the antagonism operation, these methods all can't be taken away heavy metal from soil, accomplish real soil remediation, remove heavy metal.
Phytoremediation be a kind of green cheap, by the effective control measures that people institute is extensively approved, comprise three kinds of modes: plant is fixed, phytovolatilization and plant absorbing.Seeking the high heavy metal hyperaccumulative plant of concentration coefficient is the basic and crucial of phytoremediation technology.Heavy metal excess accumulator plant is meant and can excess absorbs and the plant of accumulation heavy metal, content of beary metal in the hyperaccumulative plant body will reach more than 100 times of general plant, different units have different critical values, generally the recognized standard is in the industry, cadmium 1000mg/kg, copper, nickel, lead etc. are 1000mg/kg, and manganese, zinc are 10000mg/kg.
Phytolacca acinosa (Phytolacca acinosa Roxb.) has another name called: amaranth land, horse hair, normal knotweed, Zhang Lu, Zhang Liu, big three-coloured amaranth, wet three-coloured amaranth, small hill paddy, Jin Qiniang, red three-coloured amaranth, golden pheasant nurse, pig nurse ear, three-coloured amaranth indigo plant, big porker dish.Perennial herb, high 70～100 centimetres, complete stool does not have hair, and root is sturdy, meat, taper shape, crust is faint yellow.Stem is upright, multi-branched, green or aubergine, tool longitudinal furrow.The leaf alternate, ellipse or ovum shape ellipse, long 12～25 centimetres, wide 5～10 centimetres, the anxious point of tip, base portion wedge shape and downward, full edge, lateral vein pinniform, master pulse is sturdy; Petiole is long 1.5～3 centimetres, last mask slot, below semicircle.Give birth to or adnation on the raceme top, long 10～15 centimetres; The flower both sexes, about 8 millimeters of footpath, the tool stigma, the stigma base portion has bract 1 and squamella 2; Common 5 of calyx, idol is 4, avette or rectangular shape ellipse is just white, the thin out redness in back: no petal: stamen 8, flower pesticide is rose pink; Carpel 8～10 is from life.The berry oblate spheroid, atropurpureus when ripe is made of in about 7 millimeters of footpath usually 8 schizocarps.Seed kidney circle, flat, black.6～August of florescence.The fruit 8～October of phase.Be born under the sparse woods more, moistening place such as border, roadside, gully.
Have the research report to show that Phytolacca acinosa helps to repair the soil that is subjected to pollution by manganese, Phytolacca acinosa reaches 11.4% tailing waste ground well-grown at manganese content, and leaf manganese content is up to 1.93%; Greenhouse 45 days Phytolacca acinosa aerial part manganese accumulation of growth is 258.2 milligrams/strain, and leaf manganese content is up to 3.64%, and the manganese that plant draws has 87%～95% to be transferred to aerial part.Phytolacca acinosa population from contaminated area and uncontamination district is showing difference in the manganese accumulation existence of natural conditions, but under the manual control condition, but show similar anti-manganese and accumulation ability, leaf manganese content is up to 3.4%, and the tired ability of the manganese patience of Phytolacca acinosa and ultraproduct may be its inherent characteristic.
Summary of the invention
The object of the present invention is to provide a kind of Phytochemistry combined remediation technology of rational heavy-metal contaminated soil efficiently, solve the deficiency of the correlation technique of in the past handling heavy-metal contaminated soil, accomplish the real content of beary metal that reduces in the soil that reduces.
The technical scheme that the present invention solves the problems of the technologies described above is: by the rational and effective Phytolacca acinosa of planting, commerial growing, grow seedlings, transplant to heavy-metal contaminated soil, simultaneously in good time pouring chelating agent, realize the activating soil heavy metal, promote Phytolacca acinosa to absorb, reduce heavy metal in soil content, improve the purpose of phytoremediation heavy-metal contaminated soil efficient.
The invention discloses a kind of method of Phytochemistry renovation of heavy metal polluted soil with combined, for using Phytolacca acinosa and chelating agent is repaired heavy-metal contaminated soil.
Described heavy metal pollution comprises one or more in Mn, Pb, Cr and the Zn pollution.
Method of the present invention specifically comprises the following steps:
In heavy-metal contaminated soil, Phytolacca acinosa is sowed or the plant division cultivation, in the mid-term of Phytolacca acinosa growth, the pouring chelating agent EDTA aqueous solution in soil, EDTA concentration is 500-1000mg/kg in the solution, after treating to plant Phytolacca acinosa 2-3 continuously, soil can carry out agricultural.
The method of pouring chelating agent EDTA is: when Phytolacca acinosa grows 7-10 sheet leaf (when growing 7-10 sheet leaf when after planting growing 7-10 sheet leaf or after the plant division cultivation all can), water one time chelating agent EDTA, then at Phytolacca acinosa when ground plant length grows into 70-80cm, water chelating agent EDTA once more, after this in growth period, every chelating agent EDTA of pouring in 50-70 days, continue pouring 2-3.
Before the sowing, need seed is handled, processing method is: use H earlier
2O
2Aqueous solution soaking is carried out vernalization with the gibberellin aqueous solution soaking of 400-500mg/L again and is handled.Described H
2O
2The mass fraction of the aqueous solution is preferably 5-25%, and the best is 15%, H
2O
24-8 hour aqueous solution soaking time, preferred 8 hours.The soak time of described gibberellin is preferably 1 hour.This processing can effectively improve percentage of seedgermination, germinating energy and radicle length.
Preferable, described type of seeding is: the shallow ridges of opening 1.5～2cm in furrow by seeding row spacing 30cm * 30cm, evenly be sprinkled into seed in the shallow ridges, it is flat to cover fine sand soil (thickness 1-2cm) lid after broadcasting, water, keep moistening in the furrow, ground temperature is more than 15 ℃, about 7-10d goes out full stand, presses spacing in the rows 12～15cm final singling during height of seedling 6～8cm.
Preferable, carry out field management between planting season at Phytolacca acinosa, field management comprises the following aspects:
1. loosen the soil, weeding final singling, the back or connect when arid and water water twice of topdressing.Weeding when soil moisture content is suitable keeps loose, moistening, the no weeds of soil table.
2. compel fertile.
Be that 0.5% urea sprays the blade face with mass fraction after the field planting, on a small quantity repeatedly, total amount is no more than 225kg/ha.Before spring planting strain in next year is not germinateed, open shallow ridges at two interlines and bury and execute potassium sulfate efficient compound fertilizer 1200-1250kg/ha.Spray mass fraction 1%-1.2% potassium sulfate or mass fraction 0.5%-0.6% potassium dihydrogen phosphate 1150-1250kg/ha 7～August,, connect and spray 3～4 times every 13-15d spray 1 time.
3. cover hay.For making the pokeberry root safe overwintering and increasing organic fertilizer in the ground, in the time of the year when autumn changes into winter, in the land for growing field crops of plantation then, spread fertilizer over the fields wheat rice chaff and so on hay 6000kg/ha.
4. clipping and carving tongue.Phytolacca acinosa is bloomed for 6～August, except that the person of reserving seed for planting, will spend tongue all to cut, and reduces nutrient consumption.
5. the prevention and control of plant diseases, pest control.Phytolacca acinosa disease in the time of infertility is less, because stem, leaf are tender, mainly contains aphid damage, 600 times of liquid of available quality mark 40% gram aphid star, 1000 times of liquid of mass fraction 25% Aphox, access times are respectively 3 times, 2 times at most, safety interval is 7 days, after testing non agricultural chemical residuum.
After above-mentioned management, the Phytolacca acinosa plant of planting out grows fine, and it is strong, flourishing to have a plant rhizome, characteristics such as viability is strong, the probability that occurs diseased plant, weak strain in addition reduces greatly, the heavy metal in maximum absorption of the Phytolacca acinosa plant that this makes for good health and the transfer soil.
Method processing ease of the present invention, with low cost, can accomplish really to reduce the content of Mn in the soil, Pb, Cr, Zn.
The specific embodiment
Embodiment 1
(1) sowing of the breeding and culturing of Phytolacca acinosa or division propagation.Spring late March to early April at open field live broadcast, available trench sowing or bunch planting, earthing 5cm waters after broadcasting.Can stay seedling by the seeding row spacing of 50cm*50cm after emerging.Plant division was carried out in early spring.Note timely intertill and clean tillage during cultivation.Seedling stage and bloom before can impose rich water, in order to growth.
The smooth densification of Phytolacca acinosa seed kind skin, keratinization, difficult imbibition is germinateed, and belonging to needs the moistening breaking dormancy type of low temperature, so must handle seed earlier before the sowing.Before annual sowing early spring, use 15%H earlier
20
2Soak 8h, soak 1h with 400-500mg/L gibberellin again and handle, this processing can effectively improve percentage of seedgermination, germinating energy and radicle length (table 1).
Table 1 different disposal mode is to Phytolacca acinosa percentage of seedgermination and the long influence of radicle
Open the shallow ridges of 1.5～2cm by seeding row spacing 30cm * 30cm in furrow, seed evenly is sprinkled in the shallow ridges, it is flat to cover fine sand soil (thickness 1-2cm) lid after broadcasting, and waters, and keeps moistening in the furrow, and ground temperature is more than 15 ℃, and about 7-10d goes out full stand.Press spacing in the rows 12～15cm final singling during height of seedling 6～8cm.
The field management of Phytolacca acinosa mainly comprises the following aspects:
1. loosen the soil, weeding final singling, the back or connect when arid and water water twice of topdressing.Weeding when soil moisture content is suitable keeps loose, moistening, the no weeds of soil table.
2. compel fertile.Be that 0.5% urea sprays the blade face with mass fraction after the field planting, on a small quantity repeatedly, total amount is no more than 225kg/ha.Before spring planting strain in next year is not germinateed, open shallow ridges at two interlines and bury and execute potassium sulfate efficient compound fertilizer 1200kg/ha.Spray mass fraction 1% potassium sulfate or mass fraction 0.5% potassium dihydrogen phosphate 1200 ± 50kg/ha 7～August,, connect and spray 3～4 times every 13-15d spray 1 time.
3. cover hay.For making the pokeberry root safe overwintering and increasing organic fertilizer in the ground, in the time of the year when autumn changes into winter, in the land for growing field crops of plantation then, spread fertilizer over the fields wheat rice chaff and so on hay 6000kg/ha.
4. clipping and carving tongue.Phytolacca acinosa is bloomed for 6～August, except that the person of reserving seed for planting, will spend tongue all to cut, and reduces nutrient consumption.
5. the prevention and control of plant diseases, pest control.Phytolacca acinosa disease in the time of infertility is less, because stem, leaf are tender, mainly contains aphid damage, 600 times of liquid of available 40% gram aphid star, and 1000 times of liquid of 25% Aphox, access times are respectively 3 times, 2 times at most, and safety interval is 7 days, after testing non agricultural chemical residuum.
(2) application process of chelating agent EDTA: time of application: select Phytolacca acinosa to spray chelating agent in growth period, the abundant heavy metal in the activating soil of chelating agent like this, improve the heavy metal concentration in the soil liquid, make available state heavy metal increase in the soil, absorption by herbaceous plant (Phytolacca acinosa) is shifted, and takes soil out of after harvesting.The application concentration and the frequency: select to use the EDTA solution of 500-1000mg/kg, spray soil.In Phytolacca acinosa growth period, sprayed once every 2 months.
Gather soil from plumbous zinc ore area, Pb, Zn content are respectively 6130.58mgkg after measured
-1, 7734.43mgkg
-1, in soil, adding heavy metal Mn, Cr, the level of supply that makes Mn in the soil is that the level of supply of 5.000mmol/L, Cr is 5.000mmol/L.The chelating agent (EDTA) that adds variable concentrations is as shown in table 2 to the influence that Phytolacca acinosa absorbs heavy metal.
Table 2 adds the influence of the chelating agent of variable concentrations to Phytolacca acinosa absorption heavy metal
Table 2 data declaration, in being subjected to the soil of heavy metal pollution, adding chelating agent EDTA can promote Phytolacca acinosa to absorb heavy metal, different EDTA concentration are handled down, there is certain difference (p＜0.05) in Phytolacca acinosa to the enrichment of heavy metal, take all factors into consideration the influence of several concentration to Phytolacca acinosa absorption enriching heavy metal Mn, Pb, Cr, Zn, EDTA concentration is at 500-1000mgkg
-1Comparatively effective in the interval.
Claims (10)
1. the method for a Phytochemistry renovation of heavy metal polluted soil with combined is for using Phytolacca acinosa and chelating agent is repaired heavy-metal contaminated soil.
2. the method for Phytochemistry renovation of heavy metal polluted soil with combined according to claim 1, it is characterized in that, describedly use the step that Phytolacca acinosa and chelating agent repair heavy-metal contaminated soil and be: in heavy-metal contaminated soil, Phytolacca acinosa is sowed or the plant division cultivation, in the mid-term of Phytolacca acinosa growth, the pouring chelating agent EDTA aqueous solution in soil, EDTA concentration is 500-1000mg/kg in the solution, and after treating to plant Phytolacca acinosa 2-3 continuously, soil is agricultural.
3. as the method for Phytochemistry renovation of heavy metal polluted soil with combined as described in the claim 2, it is characterized in that: the method for the pouring chelating agent EDTA aqueous solution is: when Phytolacca acinosa grows 7-10 sheet leaf, water one time chelating agent EDTA, then at Phytolacca acinosa when ground plant length grows into 70-80cm, water chelating agent EDTA once more, after this in growth period,, continue pouring 2-3 every chelating agent EDTA of pouring in 50-70 days.
4. as the method for Phytochemistry renovation of heavy metal polluted soil with combined as described in the claim 2, it is characterized in that: before the sowing, seed is handled, processing method is: use H earlier
2O
2Aqueous solution soaking is carried out vernalization with 400-500mg/L gibberellin aqueous solution soaking again and is handled.
5. as the method for Phytochemistry renovation of heavy metal polluted soil with combined as described in the claim 4, it is characterized in that: described H
2O
2The mass fraction of the aqueous solution is 5-25%, H
2O
24-8 hour aqueous solution soaking time.
6. as the method for Phytochemistry renovation of heavy metal polluted soil with combined as described in the claim 4, it is characterized in that: the soak time of described gibberellin is 1 hour.
7. as the method for Phytochemistry renovation of heavy metal polluted soil with combined as described in the claim 2, it is characterized in that: described type of seeding is: the shallow ridges of opening 1.5～2cm in furrow by seeding row spacing 30cm * 30cm, evenly be sprinkled into seed in the shallow ridges, it is flat to cover the fine sand earth mulch after broadcasting, water, keep moistening in the furrow, ground temperature is more than 15 ℃, about 7-10d goes out full stand, presses spacing in the rows 12～15em final singling during height of seedling 6～8cm.
8. as the method for Phytochemistry renovation of heavy metal polluted soil with combined as described in the claim 2, it is characterized in that: carry out field management between planting season at Phytolacca acinosa, field management comprises the following aspects:
1. loosen the soil, weeding final singling, the back or connect when arid and water water twice of topdressing, weeding when soil moisture content is suitable keeps loose, moistening, the no weeds of soil table;
2. compel fertile;
3. cover hay;
4. clipping and carving tongue;
5. the prevention and control of plant diseases, pest control.
9. as the method for Phytochemistry renovation of heavy metal polluted soil with combined as described in the claim 8, it is characterized in that: described urgent fertile method is: be that the urea of 0.5%-0.55% sprays the blade face with mass fraction after the field planting, on a small quantity repeatedly, total amount is no more than 225kg/ha, before spring planting strain in next year is not germinateed, opening shallow ridges at two interlines buries and executes potassium sulfate efficient compound fertilizer 1 200-1250kg/ha, spray mass fraction 1%-1.2% potassium sulfate or mass fraction 0.5%-0.6% potassium dihydrogen phosphate 1150-1250kg/ha 7～August, every spray in 13-15 days 1 time, connect and spray 3～4 times.
As claim 1-9 arbitrary as described in the method for Phytochemistry renovation of heavy metal polluted soil with combined, it is characterized in that: described heavy metal pollution comprises in polluting one or more of Mn, Pb, Cr and Zn.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103521514A (en) * | 2013-10-18 | 2014-01-22 | 浙江工商大学 | Method for strengthening remediation of lead contaminated soil by combining gibberellin and ethylenediamine tetraacetic acid |
| CN103878171A (en) * | 2014-03-27 | 2014-06-25 | 常州大学 | Ecological treatment bed of chromium contaminated soil |
| CN104550208A (en) * | 2013-10-12 | 2015-04-29 | 中环循(北京)环境技术中心 | Farmland soil heavy metal pollution restoration method through coupling activating and passivating |
| CN105499261A (en) * | 2015-11-25 | 2016-04-20 | 浙江红叶园艺有限公司 | Treatment method for improving heavy metal polluted soil remediation efficiency through photinia serrulata |
| CN106069038A (en) * | 2016-06-21 | 2016-11-09 | 重庆市中药研究院 | A kind of pollution containing plantation river, cadmium soil party plant is intervened and land method |
| CN107081334A (en) * | 2017-06-12 | 2017-08-22 | 湖南科技大学 | The method of safe Planting Crops on soil polluted by manganese |
| CN109317512A (en) * | 2018-09-29 | 2019-02-12 | 常州大学 | A kind of method that EDTA strengthens asparagus remediating lead-contaminated soil |
Family Cites Families (3)
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| CN101234391B (en) * | 2007-02-02 | 2011-08-24 | 中国科学院沈阳应用生态研究所 | Combined method for repairing lead pollution soil |
| CN100556562C (en) * | 2007-08-31 | 2009-11-04 | 浙江大学 | One heavy metal species mild or moderate pollutes production limit, the limit restorative procedure of vegetable field soil |
| CN101462117B (en) * | 2007-12-19 | 2011-05-11 | 中国科学院沈阳应用生态研究所 | Combined reinforced method for repairing cadmium polluted soil |
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| CN104550208A (en) * | 2013-10-12 | 2015-04-29 | 中环循(北京)环境技术中心 | Farmland soil heavy metal pollution restoration method through coupling activating and passivating |
| CN104550208B (en) * | 2013-10-12 | 2019-05-10 | 中环循(北京)环境技术中心 | A kind of farmland soil heavy metals pollution amelioration method of coupling activation and passivation |
| CN103521514A (en) * | 2013-10-18 | 2014-01-22 | 浙江工商大学 | Method for strengthening remediation of lead contaminated soil by combining gibberellin and ethylenediamine tetraacetic acid |
| CN103878171A (en) * | 2014-03-27 | 2014-06-25 | 常州大学 | Ecological treatment bed of chromium contaminated soil |
| CN105499261A (en) * | 2015-11-25 | 2016-04-20 | 浙江红叶园艺有限公司 | Treatment method for improving heavy metal polluted soil remediation efficiency through photinia serrulata |
| CN106069038A (en) * | 2016-06-21 | 2016-11-09 | 重庆市中药研究院 | A kind of pollution containing plantation river, cadmium soil party plant is intervened and land method |
| CN107081334A (en) * | 2017-06-12 | 2017-08-22 | 湖南科技大学 | The method of safe Planting Crops on soil polluted by manganese |
| CN109317512A (en) * | 2018-09-29 | 2019-02-12 | 常州大学 | A kind of method that EDTA strengthens asparagus remediating lead-contaminated soil |
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|---|---|
| CN101704016B (en) | 2012-01-18 |
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Assignee: Hunan Yongqing Environment Remediation Co., Ltd. Assignor: Shanghai Academy of Agricultural Sciences Contract record no.: 2012430000066 Denomination of invention: Phytochemically combined remediation technology for soil contaminated by heavy metals, Mn, Pb, Cr and Zn Granted publication date: 20120118 License type: Exclusive License Open date: 20100512 Record date: 20120508 |
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Application publication date: 20100512 Assignee: Hunan Yongqing Environment Remediation Co., Ltd. Assignor: Shanghai Academy of Agricultural Sciences Contract record no.: 2012430000066 Denomination of invention: Phytochemically combined remediation technology for soil contaminated by heavy metals, Mn, Pb, Cr and Zn Granted publication date: 20120118 License type: Exclusive License Record date: 20120508 |
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