CN103586270A - Method for restoring heavy metal contaminated soil - Google Patents
Method for restoring heavy metal contaminated soil Download PDFInfo
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- CN103586270A CN103586270A CN201310550331.8A CN201310550331A CN103586270A CN 103586270 A CN103586270 A CN 103586270A CN 201310550331 A CN201310550331 A CN 201310550331A CN 103586270 A CN103586270 A CN 103586270A
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- huge bacterium
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Abstract
The invention provides a method for restoring heavy metal contaminated soil. The method comprises the following steps of applying hydrated lime powder, charcoal particles and a compound fertilizer to improve pH value of the heavy metal contaminated soil, reducing the effective state content of Cu<2+> and Cd<2+> in the soil, and enriching the heavy metal with Puelia to restore the heavy metal contaminated soil. Compared to the traditional restoring method, the method is low in restoring cost and environment-friendly, has an ecological aesthetic value, and is beneficial to quick recovery of the ecological system. In the meantime, the technology further provides a clean energy source and is beneficial to sustainable development of China.
Description
Technical field:
The present invention relates to heavy-metal contaminated soil and administer field, be specifically related to significantly to reduce heavy metal activity in contaminated soil, shift in a large number the restorative procedure of heavy metal.
Background technology:
Heavy metal is the intrinsic component of soil, is prevalent in natural environment.Appropriate heavy metal plays a driving role to vegeto-animal growth; When content exceeds certain load capacity, animals and plants are produced to harmful effect.Heavy metal is difficult to be degraded by microorganisms, and animal migration is poor in soil environment, once soil is contaminated by heavy metals, administers difficult.The method of traditional processing heavy-metal contaminated soil is as the existing that investment is large, high, the operating difficulties of consuming energy, easily produce the shortcomings such as secondary pollution in various degree such as stabilisation, immobilization, electronic reparation, the method for improving the soil, Soil leaching, and meeting spoiled soil structure, cause soil quality to decline.Although as soil moved in to improve the original method has guaranteed the clean of contaminated area soil, but contaminated soil is transferred and has brought potential pollution threat.Pollutant is used to cement to curing or other material fixed packet wraps, and temporarily reduced pollution risk, but expose the threat of polluting along with passage of time still has.Phytoremediation technology can absorb accumulation by plant, shift heavy metal-polluted soil, and then reduces the total amount of heavy metal in soil.But because impurely environment is severe, be unfavorable for plant growth, reduced remediation efficiency, limited its extensive use.Stabilization Remediation Technology, by apply chemical substance in soil, reduces heavy metal activity, has reduced the environmental risk of contaminated soil, but but can not reduce the total amount of heavy metal in soil.Therefore, need a kind of heavy metal activity that can reduce badly and meet plant growth, can shift in a large number heavy metal by plant again, reach the method for restoration of soil polluted by heavy metal.
Summary of the invention:
The restorative procedure that the object of this invention is to provide a kind of heavy-metal contaminated soil.Proposed that a kind of to take white lime and charcoal be modifying agent, huge bacterium grass, for absorbing plant, is administered the restorative procedure of heavy metal serious pollution soil.Stabilization technology by lime and charcoal reduces heavy metal activity on the one hand, for rehabilitation plant provides growth conditions; On the other hand, by huge bacterium grass, absorb and shift heavy metal, thereby reaching the object of removing heavy metal in soil.
For achieving the above object, the present invention by the following technical solutions.
A restorative procedure for heavy-metal contaminated soil, comprises the steps:
(1) use modifying agent and composite fertilizer: described modifying agent is formulated by hydrated lime in powder and charcoal particle, according to soil cultivation layer thickness and the soil weight, calculate every mu of topsoil soils quality, 0.2-0.6% the ratio according to soil quality applies hydrated lime in powder, 0.25-0.5% the ratio in soil quality applies charcoal particle, by 60 kilograms every mu, apply composite fertilizer, with rotary cultivator, soil and modifying agent and composite fertilizer are fully mixed, become a homogeneous system;
(2) huge bacterium grass is transplanted: apply after modifying agent, clear water is irrigated balance 2-4 after week, uses machinery according to line-spacing 40cm, to be ditched in soil, and then ridging by the huge bacterium grass seedling cultivating in advance, plants according to spacing in the rows 40cm kind;
(3) field management: huge bacterium grass is transplanted 3-4 after week, and every mu imposes 2 kilograms, urea, imposes afterwards 3,000 grams/acre, urea every 60 days; At huge bacterium grass, transplant and use glyphosate to carry out field weeding in about 90 days, and according to degree of drought, carry out field irrigation within whole growth period;
(4) huge bacterium grass harvesting: the growth of huge bacterium grass is after 180-210 days, and harvesting aerial part, estimates every per mu yield, and toothing 5-10 cm, and root earthing is to protect huge bacterium grass to pass the winter; Meanwhile, gather soil and huge bacterium grass sample, analyze soil pH, Cu and Cd available state content, and the interior Cu of plant and Cd content.
Described hydrated lime in powder, by by after quick lime slaking, is crossed 10 mesh sieves and is removed stone acquisition.
The particle diameter of described charcoal particle is 20 orders.
Described composite fertilizer its available nutrient N:P
2o
5: K
2o ratio is 15:15:15.
The method of every mu of huge bacterium grass output of described estimation is: by gathering in the crops the biomass of 3 blocks of 2 square metres of huge bacterium grass, try to achieve after mean value, be multiplied by 333.33, obtain every mu of estimation output.
Described Cu and Cd available state assay method are: take 5g and cross 20 mesh sieve soil in 50ml centrifuge tube, add 0.01 mol/L CaCL2 solution 25ml, 2 h are extracted in concussion, and centrifugal 10 minutes of 3000r/min, measures content of beary metal in supernatant after 0.45 μ m membrane filtration.
This method is compared with traditional restorative procedure, has rehabilitation cost low, environmental friendliness, and there is ecoaesthetics value, be conducive to the fast quick-recovery of the ecosystem.Meanwhile, this technology can also provide clean energy resource, is conducive to the sustainable development of China.
Experiment:
(1) on December 1st, 2012, buy huge bacterium grass blade stalk, be cut into segment, grow seedlings.
(2) according to soil cultivation layer thickness and the soil weight, calculate every mu of topsoil soils quality, by hydrated lime in powder and charcoal particle respectively according to the 0.2%+0.5% of topsoil soils quality, 0.4%+0.25%, the combination of 0.6%+0.25% ratio applies, be designated as respectively and process 1, processing 2 and processing 3, each processes 400 square metres of community areas; Simultaneously according to every mu of 60 kilograms of consumption, add composite fertilizer, with rotary cultivator, soil and modifying agent and fertilizer are fully mixed, become a homogeneous system; With not adding any modifying agent, other fertilising, sowing, way to manage and apply modifying agent and process consistent processing in contrast.
(3) apply after modifying agent, clear water is irrigated balance 3 weeks, uses machinery according to line-spacing 40cm, to be ditched in soil, ridging.Clear water is irrigated balance fully reacts soil and modifying agent, and reaches poised state.On April 3rd, 2013, by what cultivate in advance, the huge bacterium grass seedling of high 6-10cm, according to spacing in the rows 40cm, plantation, and water a little clear water.
(4) huge bacterium grass was transplanted after 1 month, and every mu imposes 2 kilograms, urea, imposes afterwards 3,000 grams/acre, urea every 60 days; At huge bacterium grass, transplant and use glyphosate to carry out field weeding in about 90 days, and according to degree of drought, carry out field irrigation within whole growth period.
(5) growth of huge bacterium grass is after 210 days, and each community respectively gathers the huge bacterium grass of 32 square metres of communities, estimates huge bacterium grass output; Huge bacterium grass toothing 5-10 cm, and earthing is to protect huge bacterium grass to pass the winter; Meanwhile, gather soil and huge bacterium grass sample, analyze soil pH, Cu and Cd available state content, and the interior Cu of plant and Cd content.
(6) this serious pollution heavy metal-polluted soil Cu content is 826 mg/kg, and Cd content is 1.20 mg/kg, gathers in the crops the post processing 1 of huge bacterium grass, processes 2 and makes respectively soil pH bring up to 5.2,5.9 and 6.3 by 4.5 of control treatment with processing 3; Soil available Cu2+ concentration is reduced to 8.74,1.25 and 0.87 mg/kg from 72.3 of contrast, and Cd2+ is reduced to 140,37.2 and 12.1 μ g/kg from 481 of contrast; The biomass of huge bacterium grass is brought up to 0.81,2.32 and 3.03 t/ mus from 0 t/ mu of contrast; The heavy metal Cu content of huge bacterium grass enrichment is respectively 150,131 and 109 mg/kg, and Cd content is respectively 2.82,2.54 and 2.09mg/kg; Process every mu of accumulation for three and shift heavy metal Cu 121,304 and 330 g, Cd 2.28,5.89 and 6.34 g.Above result shows, from reducing heavy metal activity, improve huge bacterium grass biomass, the effect of processing 3 is best, processes 2 effects and takes second place, and processes 1 effect the poorest, but it is maximum to process 3 modifying agent consumptions, on soil physico-chemical property impact significantly, and increased rehabilitation cost, therefore the modifying agent proportioning of processing 2 is used in suggestion.
Claims (4)
1. a restorative procedure for heavy-metal contaminated soil, its feature comprises the steps:
(1) use modifying agent and composite fertilizer: described modifying agent is formulated by hydrated lime in powder and charcoal particle, according to soil cultivation layer thickness and the soil weight, calculate every mu of topsoil soils quality, 0.2-0.6% the ratio according to soil quality applies hydrated lime in powder, 0.25-0.5% the ratio in soil quality applies charcoal particle, by 60 kilograms every mu, apply composite fertilizer, with rotary cultivator, soil and modifying agent and composite fertilizer are fully mixed, become a homogeneous system;
(2) huge bacterium grass is transplanted: apply after modifying agent, clear water is irrigated balance 2-4 after week, uses machinery according to line-spacing 40cm, to be ditched in soil, and then ridging by the huge bacterium grass seedling cultivating in advance, plants according to spacing in the rows 40cm kind;
(3) field management: huge bacterium grass is transplanted 3-4 after week, and every mu imposes 2 kilograms, urea, imposes afterwards 3,000 grams/acre, urea every 60 days; At huge bacterium grass, transplant and use glyphosate to carry out field weeding in about 90 days, and according to degree of drought, carry out field irrigation within whole growth period;
(4) huge bacterium grass harvesting: the growth of huge bacterium grass is after 180-210 days, and harvesting aerial part, estimates every per mu yield, and toothing 5-10 cm, and root earthing is to protect huge bacterium grass to pass the winter; Meanwhile, gather soil and huge bacterium grass sample, analyze soil pH, Cu and Cd available state content, and the interior Cu of plant and Cd content.
2. restorative procedure according to claim 1, is characterized in that described hydrated lime in powder passes through after quick lime slaking, crosses 10 mesh sieves and removes stones acquisition.
3. restorative procedure according to claim 1, the particle diameter that it is characterized in that described charcoal particle is 20 orders.
4. restorative procedure according to claim 1, is characterized in that described composite fertilizer its available nutrient N:P
2o
5: K
2o ratio is 15:15:15.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104845628A (en) * | 2015-04-22 | 2015-08-19 | 清华大学 | Calcium-based liquid curing agent and vanadium-polluted soil in-situ immobilization method |
| CN105123013A (en) * | 2015-09-29 | 2015-12-09 | 河南寰宇环保科技有限公司 | Method for surface purification and ecological restoration of gold tailing pond |
| CN105170618A (en) * | 2015-09-30 | 2015-12-23 | 河南行知专利服务有限公司 | Method for remediating heavy metal contaminated soil through cooperation of activating agents and plants |
| CN106345795A (en) * | 2016-08-22 | 2017-01-25 | 李荣华 | Method for promoting symphytum officinale to enrich and absorb heavy metal from heavy metal contaminated soil |
| CN106717798A (en) * | 2016-11-22 | 2017-05-31 | 湖南省土壤肥料研究所 | A kind of method of the low cadmium forage grass cultivation of high yield |
| CN107234128A (en) * | 2017-08-04 | 2017-10-10 | 关越 | A kind of method of Phytoremediation of Soils Contaminated by Heavy Metals |
| CN108781682A (en) * | 2018-05-25 | 2018-11-13 | 成都纳诺环保科技有限责任公司 | A kind of planting new method of enriched in metals cadmium |
| CN109174937A (en) * | 2018-10-15 | 2019-01-11 | 上海邻肯园林科技有限公司 | A kind of heavy-metal contaminated soil restorative procedure |
| CN109465281A (en) * | 2018-12-25 | 2019-03-15 | 成都全健水工科技有限公司 | Phosphorus tailing original position ecological restoring method |
| CN109926435A (en) * | 2019-04-11 | 2019-06-25 | 北京净界新宇环保科技有限公司 | A kind of processing method of heavy metal cadmium |
| CN111906130A (en) * | 2020-06-28 | 2020-11-10 | 中国科学院广州能源研究所 | Soil pollution treatment method based on plant physiology and physics regulation |
| CN113385529A (en) * | 2021-07-09 | 2021-09-14 | 西藏自治区农牧科学院农业质量标准与检测研究所 | Fungus grass restoration technology for heavy metal contaminated soil |
| CN115572187A (en) * | 2022-08-29 | 2023-01-06 | 中昇南阳生物科技有限公司 | Microbial compound fertilizer and method for repairing heavy metal contaminated soil by using same |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104845628A (en) * | 2015-04-22 | 2015-08-19 | 清华大学 | Calcium-based liquid curing agent and vanadium-polluted soil in-situ immobilization method |
| CN105123013A (en) * | 2015-09-29 | 2015-12-09 | 河南寰宇环保科技有限公司 | Method for surface purification and ecological restoration of gold tailing pond |
| CN105170618A (en) * | 2015-09-30 | 2015-12-23 | 河南行知专利服务有限公司 | Method for remediating heavy metal contaminated soil through cooperation of activating agents and plants |
| CN106345795A (en) * | 2016-08-22 | 2017-01-25 | 李荣华 | Method for promoting symphytum officinale to enrich and absorb heavy metal from heavy metal contaminated soil |
| CN106717798B (en) * | 2016-11-22 | 2020-06-02 | 湖南省土壤肥料研究所 | Method for cultivating forage grass with high yield and low cadmium |
| CN106717798A (en) * | 2016-11-22 | 2017-05-31 | 湖南省土壤肥料研究所 | A kind of method of the low cadmium forage grass cultivation of high yield |
| CN107234128A (en) * | 2017-08-04 | 2017-10-10 | 关越 | A kind of method of Phytoremediation of Soils Contaminated by Heavy Metals |
| CN108781682A (en) * | 2018-05-25 | 2018-11-13 | 成都纳诺环保科技有限责任公司 | A kind of planting new method of enriched in metals cadmium |
| CN109174937A (en) * | 2018-10-15 | 2019-01-11 | 上海邻肯园林科技有限公司 | A kind of heavy-metal contaminated soil restorative procedure |
| CN109465281A (en) * | 2018-12-25 | 2019-03-15 | 成都全健水工科技有限公司 | Phosphorus tailing original position ecological restoring method |
| CN109926435A (en) * | 2019-04-11 | 2019-06-25 | 北京净界新宇环保科技有限公司 | A kind of processing method of heavy metal cadmium |
| CN111906130A (en) * | 2020-06-28 | 2020-11-10 | 中国科学院广州能源研究所 | Soil pollution treatment method based on plant physiology and physics regulation |
| CN111906130B (en) * | 2020-06-28 | 2022-05-17 | 中国科学院广州能源研究所 | Soil pollution treatment method based on plant physiology and physics regulation |
| CN113385529A (en) * | 2021-07-09 | 2021-09-14 | 西藏自治区农牧科学院农业质量标准与检测研究所 | Fungus grass restoration technology for heavy metal contaminated soil |
| CN115572187A (en) * | 2022-08-29 | 2023-01-06 | 中昇南阳生物科技有限公司 | Microbial compound fertilizer and method for repairing heavy metal contaminated soil by using same |
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Application publication date: 20140219 |