CN102172606A - Method for repairing heavy metal polluted soil by utilizing granular composite red mud - Google Patents
Method for repairing heavy metal polluted soil by utilizing granular composite red mud Download PDFInfo
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- CN102172606A CN102172606A CN2011100083477A CN201110008347A CN102172606A CN 102172606 A CN102172606 A CN 102172606A CN 2011100083477 A CN2011100083477 A CN 2011100083477A CN 201110008347 A CN201110008347 A CN 201110008347A CN 102172606 A CN102172606 A CN 102172606A
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Abstract
The invention relates to a method for repairing heavy metal polluted soil by utilizing granular composite red mud. The method comprises the following steps of: improving a red mud material by virtue of a partial hydration process, combining the improved red mud material with other soil conditioners, controlling an application way used for repairing soil and adjusting water consumption, slowing down release of alkali substances in the soil, ensuring the repairing effect of the red mud composite material to be lasting, and reducing intense change on soil microenvironment. By applying the method, the soil can be effectively improved, thus the soil is beneficial to growth of a crop; and meanwhile, the available heavy metal content of an organism can be effectively reduced, the stabilization effect can be improved, and accumulation of heavy metal in the organism can be reduced.
Description
Technical field
The present invention relates to the soil remediation technology, relate in particular to a kind of method of utilizing the compound red mud restoration of soil polluted by heavy metal of granulating.
Background technology
Red mud is the waste residue of aluminium oxide smeltery, because of its generation is big, and the alkaline extremely strong harm that pollutes of leachate.Red mud is having certain effect aspect the pollution reparation of heavy metal in soil in recent years, but all utilize directly to apply, because of red mud neutral and alkali material is dissolved in the soil liquid, amount of application surpasses the 1% pH value that promptly improved soil greatly, changed the normal physical and chemical performance of soil-root system, hindered the crop normal growth, and soil ecology has been had lasting adverse effect.Therefore be used for soil remediation and agricultural resource is restricted, it utilizes effect also can't significantly improve.
Modify by red mud being carried out chemical modifying, and control is used for the method for application and the water consumption adjusting of soil remediation, slow down the wherein release of alkaline matter, prolong the recovery dynatron effect of red mud composite, minimizing is to the strong change of soil microenvironment, and further improves the passivation effect to heavy metal on red mud prepared using basis.
Summary of the invention
Technical problem solved by the invention is to provide a kind of method of utilizing the compound red mud restoration of soil polluted by heavy metal of granulating; the stabilisation and the plant absorbing that are used for heavy metal-polluted soil suppress; and effectively slow down the farmland phosphorus loss; improve the utilization rate of red mud waste material, and in application, keep the normal microenvironment of soil.
Technical problem solved by the invention realizes by the following technical solutions:
A kind of method of utilizing the compound red mud restoration of soil polluted by heavy metal of granulating by part hydration process improvement red mud material, and utilizes the red mud material after the improvement to use in conjunction with other soil conditioners, is prepared as the granule that the result is loosened through granulation.
Its concrete steps are: at first, the red mud of using content 1-5% is behind soil, regulate soil moisture content to 30-50%, progressively stripping and the diffusion of red mud neutral and alkali material, make this particle renovation agent in use have continuous action, improvement gets adverse effect because of the red mud strong basicity hinders the crop normal growth, and further suppresses the absorption of crop to heavy metal, improves the utilization and the repairing effect of red mud simultaneously.
Add the 5-10% additive again, surfactant 0.1%, phosphorus content 2.85-5.7%.According to the suitable ratio of mud, adopt the rotary drum granulator to prepare 0.250mm ~ 0.850mm red mud composite particles.Mix with mode with mixing and to be used for the heavy metal pollution reparation in soil table soil 15-20cm, the phase water makes soil moisture content to 20-50% at regular intervals.
In the present invention, the amount that the red mud raw meal can be used for the heavy metal-polluted soil reparation is brought up to 3%-5% by 0.5%-1%.Only this a bit can to a certain degree solve the not enough puzzlement of red mud resource utilization rate.In the use, it is constant substantially to keep the soil microenvironment, helps the growth of crop.Effectively reduce biological available state content of beary metal, improve stabilization effect, reduce heavy metal accumulation in vivo.The solvable phosphorus of fixing part simultaneously improves phosphorus later use rate and reduces the loss of phosphorus;
Beneficial effect: the present invention modifies by red mud being carried out chemical modifying, and control is used for the method for application and the water consumption adjusting of soil remediation, slow down the wherein release of alkaline matter, prolong the recovery dynatron effect of red mud composite, minimizing is to the strong change of soil microenvironment, and further improves the passivation effect to heavy metal on red mud prepared using basis.
The specific embodiment
Give an actual example below and describe the present invention.
Embodiment one:
Remove behind the thick impurity air-dryly to take from the mining area lead 3-5 pollution soil 5kg doubly that exceeds standard, do the potted plant reparation of leek with soil layer that this soil is filled 25-30cm.Add the compound red mud particle of 200-300g, add deionized water by soil 50% moisture content and mix, keep soil moisture content 30-50% between culture period.
By continuous extraction and analyzing and testing, behind the reparation 30d, wherein plumbous the increasing of residual form reaches 81.26%, organically combines attitude, Fe-Mn oxide, and carbonate attitude lead reduces 78.74%, 85.62%, 73.46% respectively.The microcosmic salt dissolution rate that adds is lower than 50%.Lead content descends in the leek, absorbs inhibiting rate and reaches 86.88%.
Embodiment two:
Pour water by rice field water content 70%, add suitable fertilizer by fertilizer requirement after, add the 1-2% red mud particle 15-25cm soil layer of turning over again, the field management mode is undertaken by the actual production mode.Supplementary irrigation water is to moisture 50-70% before heading stage.The full Cd of soil is 8.09 mgkg-1, and full Pb is 589.23 mgkg-1, and full Zn is 613.07 mgkg-1.After 3 months, exchange state Cd in the soil, the content of Pb and Zn has reduced by 40.81%, 25.68% and 38.48% than blank respectively, and soil pH value has improved 1 unit.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof
Claims (2)
1. a method of utilizing the compound red mud restoration of soil polluted by heavy metal of granulating is characterized in that, by part hydration process improvement red mud material, and utilizes the red mud material after the improvement to use in conjunction with other soil conditioners, and its concrete steps are:
At first, the red mud of using content 1-5% is regulated soil moisture content to 30-50% behind soil;
Add the 5-10% additive again; surfactant 0.1%; phosphorus content 2.85-5.7%; according to the ratio of mud; adopt the rotary drum granulator to prepare 0.250mm ~ 0.850mm red mud composite particles; mix with mode with mixing and to be used for the heavy metal pollution reparation in soil table soil 15-20cm, the phase water makes soil moisture content to 20-50% at regular intervals.
2. a kind of method of utilizing the compound red mud restoration of soil polluted by heavy metal of granulating according to claim 1 is characterized in that, the amount that the red mud raw meal can be used for the heavy metal-polluted soil reparation is brought up to 3%-5% by 0.5%-1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100083477A CN102172606A (en) | 2011-01-17 | 2011-01-17 | Method for repairing heavy metal polluted soil by utilizing granular composite red mud |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100083477A CN102172606A (en) | 2011-01-17 | 2011-01-17 | Method for repairing heavy metal polluted soil by utilizing granular composite red mud |
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| CN102172606A true CN102172606A (en) | 2011-09-07 |
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| CN2011100083477A Pending CN102172606A (en) | 2011-01-17 | 2011-01-17 | Method for repairing heavy metal polluted soil by utilizing granular composite red mud |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921713A (en) * | 2012-10-30 | 2013-02-13 | 中国科学院武汉岩土力学研究所 | Solidification and stabilization treatment process for heavy-metal polluted soil |
| CN102974603A (en) * | 2012-11-28 | 2013-03-20 | 沈阳工业大学 | Method for improving heavy metal contaminated soil by adopting combination of red mud and liquid film |
| CN103272836A (en) * | 2013-06-09 | 2013-09-04 | 湖南农业大学 | Red mud composite material and repairing method thereof for soil |
| CN106623400A (en) * | 2016-11-15 | 2017-05-10 | 中国环境科学研究院 | Method for remedying heavy metal contaminated soil through passivation |
| CN110079329A (en) * | 2018-01-26 | 2019-08-02 | 助听产业株式会社 | Manufacture composition, soil conditioner and the soil improvement method of soil conditioner |
| CN111014267A (en) * | 2019-12-26 | 2020-04-17 | 郑州大学 | Compound comprehensive red mud ecological restoration system and restoration method |
| CN107794050B (en) * | 2017-10-25 | 2021-01-08 | 湖南鼎玖能源环境科技股份有限公司 | Preparation method and application of biochar-based cadmium-polluted soil conditioner |
| CN117625199A (en) * | 2023-11-21 | 2024-03-01 | 广西壮族自治区自然资源生态修复中心 | Non-ferrous metal mining area soil solidification stabilization restoration agent and application method thereof |
-
2011
- 2011-01-17 CN CN2011100083477A patent/CN102172606A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921713A (en) * | 2012-10-30 | 2013-02-13 | 中国科学院武汉岩土力学研究所 | Solidification and stabilization treatment process for heavy-metal polluted soil |
| CN102921713B (en) * | 2012-10-30 | 2013-10-16 | 中国科学院武汉岩土力学研究所 | Solidification and stabilization treatment process for heavy-metal polluted soil |
| CN102974603A (en) * | 2012-11-28 | 2013-03-20 | 沈阳工业大学 | Method for improving heavy metal contaminated soil by adopting combination of red mud and liquid film |
| CN103272836A (en) * | 2013-06-09 | 2013-09-04 | 湖南农业大学 | Red mud composite material and repairing method thereof for soil |
| CN103272836B (en) * | 2013-06-09 | 2015-04-29 | 湖南农业大学 | Red mud composite material and repairing method thereof for soil |
| CN106623400A (en) * | 2016-11-15 | 2017-05-10 | 中国环境科学研究院 | Method for remedying heavy metal contaminated soil through passivation |
| CN107794050B (en) * | 2017-10-25 | 2021-01-08 | 湖南鼎玖能源环境科技股份有限公司 | Preparation method and application of biochar-based cadmium-polluted soil conditioner |
| CN110079329A (en) * | 2018-01-26 | 2019-08-02 | 助听产业株式会社 | Manufacture composition, soil conditioner and the soil improvement method of soil conditioner |
| CN110079329B (en) * | 2018-01-26 | 2021-03-19 | 助听产业株式会社 | Composition for producing soil conditioner, and soil conditioning method |
| CN111014267A (en) * | 2019-12-26 | 2020-04-17 | 郑州大学 | Compound comprehensive red mud ecological restoration system and restoration method |
| CN111014267B (en) * | 2019-12-26 | 2021-11-02 | 郑州大学 | Compound comprehensive red mud ecological restoration system and restoration method |
| CN117625199A (en) * | 2023-11-21 | 2024-03-01 | 广西壮族自治区自然资源生态修复中心 | Non-ferrous metal mining area soil solidification stabilization restoration agent and application method thereof |
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Application publication date: 20110907 |