CN103320139A - Environment-friendly eluent for treating heavy-metal-polluted soil - Google Patents
Environment-friendly eluent for treating heavy-metal-polluted soil Download PDFInfo
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- CN103320139A CN103320139A CN2013102298970A CN201310229897A CN103320139A CN 103320139 A CN103320139 A CN 103320139A CN 2013102298970 A CN2013102298970 A CN 2013102298970A CN 201310229897 A CN201310229897 A CN 201310229897A CN 103320139 A CN103320139 A CN 103320139A
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Abstract
An environment-friendly eluent for treating heavy-metal-polluted soil comprises tetrasodium iminodisuccinate, concentrated nitric acid and water, wherein the mass ratio of each component after preparation is as following: tetrasodium iminodisuccinate 0.18-5 per mill, concentrated nitric acid 0.024-0.6 per mill, and water 994.4-999.796 per mill. The preparation method is as following: 1. putting tetrasodium iminodisuccinate with mass ratio 0.18-5 per mill into a plastic barrel, and adding water with mass ratio 994.4-999.796 per mill into the plastic barrel, then stirring the resultant by a stirrer for 10 min to have the tetrasodium iminodisuccinate fully dissolved; 2. adding concentrated nitric acid with mass ratio 0.024-0.6 per mill into the plastic barrel, and then stirring the resultant by a stirrer for 10 min to obtain the environment-friendly eluent for treating heavy-metal-polluted soil. By the invention, the eluent can restore heavy-metal-polluted soil and can be biodegraded completely without causing a second pollution.
Description
Technical field
The present invention relates to contaminated soil improvement technology, specifically a kind of environment-friendly type leacheate for administering heavy-metal contaminated soil.
Background technology
Soil is basic substance and the envrionment conditions that the mankind depend on for existence and development.Soil pollution not only causes crop production reduction and pollution of agricultural products, causes the food-safety problem of agricultural-food; Soil pollution also can cause atmosphere and water body environment pollution.Entered since 20th century, because industrial activity (such as mining and smelting) and agriculture production (sewage irrigation, mud, agricultural chemicals, chemical fertilizer application etc.) cause a large amount of soil in the whole world contaminated by heavy metals.At present, all there is heavy metal contamination in various degree in countries in the world soil, and the U.S. preferentially administers in the pending contaminated soil in 1200 places on the inventory 60% and is heavy metal contamination, and current China is subjected to the farm land of heavy metal contamination to be about 2.5 * 10
7Hm
2, wherein the severe contamination soil surpasses 7 * 10
5Hm
2, heavy metal contamination is also very outstanding in other countries.Therefore the improvement of heavy-metal contaminated soil has become the hot issue of Chinese scholars and public attention.
Current, the heavy-metal contaminated soil improvement technology of Chinese scholars extensive concern mainly contains Electroremediation technology, phytoremediation technology, curing-stabilization technique, drip washing recovery technique etc.Wherein the Soil leaching recovery technique can remove pollutent fast from soil, finishes the improvement of high density pollution soil in the short period of time, and control expense is cheap, has now become one of the focus of contaminated soil fast repair technique research and developing direction.
The key problem in technology of Soil leaching is to seek a kind ofly can to extract various pollutents, again the leacheate of spoiled soil structure not.The character of pollutent and the feature of soil are depended in the selection of leacheate, and this also is one of emphasis of a large amount of soil washing researchs.At present, the heavy metal leacheate of having reported mainly is inorganic acids leacheate and artificial sequestrant class leacheate.Studies show that in a large number, the heavy metal contaminants in the soil can be effectively removed in mineral acid drip washing, but usually just can obtain higher removal efficient in acid concentration under greater than 0.1 mole every liter condition, yet physics, chemistry and biological structure that higher acidity simultaneously also can spoiled soil, and cause a large amount of loss of soil nutrient; And strong acidic condition is also higher to the requirement for the treatment of facility, therefore is restricted in actual applications.The artificial sequestrant such as ethylenediamine tetraacetic acid (EDTA) (EDTA), diethylenetriamine pentaacetic acid (DTPA) and hydroxyethylethylene diamine tri-acetic acid (HEDTA) is owing to can form stable complex compound with many metal ion species, make it from soil particle surface desorption/dissolving, research and practice is repaired in the drip washing that therefore is widely used in heavy-metal contaminated soil.But because these sequestrants itself have certain toxicity, and biological degradability is poor, can enter ecological recycle system as the eluent main component, causes secondary pollution.Therefore need the new environment-friendly type leacheate that can administer heavy-metal contaminated soil of exploitation badly.
Summary of the invention
The objective of the invention is for a kind of environment-friendly type leacheate for administering heavy-metal contaminated soil is provided, this environment-friendly type leacheate is a kind of environment-friendly type leacheate, can restoration of soil polluted by heavy metal, can be biodegradable fully, and can not cause secondary pollution.
Technical scheme of the present invention is: a kind of formulated by iminodisuccinic acid four sodium, concentrated nitric acid and water for the environment-friendly type leacheate of administering heavy-metal contaminated soil, and the content (mass ratio) of each component after the preparation: iminodisuccinic acid four sodium 0.18～5 ‰; Concentrated nitric acid 0.024～0.6 ‰, water 994.4～999.796 ‰.A kind of environment-friendly type leacheate for administering heavy-metal contaminated soil prepares by the following method:
1, taking by weighing mass ratio is 0.18～5% iminodisuccinic acid four sodium, and it is joined in the plastic tank, then adds mass ratio in the plastic tank and be 99.44～999.796 ‰ water, stirs 10 minutes with agitator, and iminodisuccinic acid four sodium are all dissolved.
2, adding mass ratio in the plastic tank is 0.024～0.6 ‰ concentrated nitric acid, stirs 10 minutes with agitator, namely obtains for the environment-friendly type leacheate of administering heavy-metal contaminated soil.
The active ingredient of the leacheate that the present invention adopts is iminodisuccinic acid four sodium.Iminodisuccinic acid four sodium are a kind of amino acid based green sequestrants soluble in water, and metal complex ability and EDTA approach, and cost is low, and nontoxic, can be biodegradable fully in the entered environment, and safety and environmental protection can not cause secondary pollution to environment.
The purpose that adds concentrated nitric acid is to regulate leacheate for neutral, because we experimental studies have found that by criticizing iminodisuccinic acid four sodium have good elutive power to heavy metal under neutral and alkalescence condition, Zn, Cu, Cd drip washing clearance all can reach more than 90% in the counterweight metal combined contamination soil, the efficient heavy metal contaminants in the wash-out soil, repairing polluted soil.But, adopt alkaline leacheate drip washing easily to cause repairing rear soil pH value meta-alkalescence, the bioavailability of soil after impact is repaired.Therefore, add nitric acid leacheate is transferred to neutrality, in drip washing repairing heavy metal pollution thing, reduced the impact of lessivation on soil acidity or alkalinity, improved the biological suitability of soil after repairing.
Embodiment
Embodiment
Embodiment 1
A kind of environment-friendly type leacheate for administering heavy-metal contaminated soil comprises iminodisuccinic acid four sodium, nitric acid and water.Its content is: iminodisuccinic acid four sodium 0.18 g; Concentrated nitric acid 0.024g, water 999.796g.Its preparation method is:
1, takes by weighing 0.18g iminodisuccinic acid four sodium, it is joined in the plastic tank, then in plastic tank, add 999.796 g water, stirred 15 minutes with agitator, iminodisuccinic acid four sodium are all dissolved.
2, in plastic tank, add the 0.024g concentrated nitric acid, stirred 15 minutes with agitator, namely obtain for environment-friendly type leacheate 1 kg that administers heavy-metal contaminated soil.
Embodiment 2
A kind of environment-friendly type leacheate for administering heavy-metal contaminated soil comprises iminodisuccinic acid four sodium, concentrated nitric acid and water.Its content is: iminodisuccinic acid four sodium 0.5 kg; Concentrated nitric acid 0.06 kg, water 99.44 kg.Its preparation method is:
1, takes by weighing 0.5 kg iminodisuccinic acid, four sodium, it is joined in the plastic tank, then in plastic tank, add 99.44 kg water, stirred 15 minutes with agitator, iminodisuccinic acid four sodium are all dissolved.
2, in plastic tank, add 0.06 kg concentrated nitric acid, stirred 15 minutes with agitator, namely obtain for environment-friendly type leacheate 100 kg that administer heavy-metal contaminated soil.
Embodiment 3
A kind of environment-friendly type leacheate for administering heavy-metal contaminated soil comprises iminodisuccinic acid four sodium, concentrated nitric acid and water.Its content is: iminodisuccinic acid four sodium 0.36 kg; Concentrated nitric acid 0.048 kg, water 1.99 kg.Its preparation method is:
1, takes by weighing 0.36 kg iminodisuccinic acid, four sodium, it is joined in the plastic tank, then in plastic tank, add 1.99 kg water, stirred 15 minutes with agitator, iminodisuccinic acid four sodium are all dissolved.
2, in plastic tank, add 0.048 kg concentrated nitric acid, stirred 15 minutes with agitator, namely obtain for environment-friendly type leacheate 2 kg that administer heavy-metal contaminated soil.
Embodiment 4
A kind of environment-friendly type leacheate for administering heavy-metal contaminated soil comprises iminodisuccinic acid four sodium, concentrated nitric acid and water.Its content is: iminodisuccinic acid four sodium 0.9 kg; Concentrated nitric acid 0.12 kg, water 4.99 kg.Its preparation method is:
1, takes by weighing 0.9 kg iminodisuccinic acid, four sodium, it is joined in the plastic tank, then in plastic tank, add 4.99 kg water, stirred 15 minutes with agitator, iminodisuccinic acid four sodium are all dissolved.
2, in plastic tank, add 0.12 kg concentrated nitric acid, stirred 15 minutes with agitator, namely obtain for environment-friendly type leacheate 5 kg that administer heavy-metal contaminated soil.
Embodiment 5
A kind of environment-friendly type leacheate for administering heavy-metal contaminated soil comprises iminodisuccinic acid four sodium, concentrated nitric acid and water.Its content is: iminodisuccinic acid four sodium 1.44 kg; Concentrated nitric acid 0.19 kg, water 7.99 kg.Its preparation method is:
1, takes by weighing 1.44 kg iminodisuccinic acids, four sodium, it is joined in the plastic tank, then in plastic tank, add 7.99 kg water, stirred 15 minutes with agitator, iminodisuccinic acid four sodium are all dissolved.
2, in plastic tank, add 0.19 kg concentrated nitric acid, stirred 15 minutes with agitator, namely obtain for environment-friendly type leacheate 8 kg that administer heavy-metal contaminated soil.
Claims (1)
1. environment-friendly type leacheate of be used for administering heavy-metal contaminated soil, it is characterized in that: this environment-friendly type leacheate is formulated by iminodisuccinic acid four sodium, concentrated nitric acid and water, and the mass ratio of each component is after the preparation: iminodisuccinic acid four sodium 0.18～5 ‰; Concentrated nitric acid 0.024～0.6 ‰, water 994.4～999.796 ‰; This environment-friendly type leacheate prepares by the following method: (1), to take by weighing mass ratio be 0.18～5% iminodisuccinic acid four sodium, it is joined in the plastic tank, then add mass ratio in the plastic tank and be 99.44～999.796 ‰ water, stirred 10 minutes with agitator, iminodisuccinic acid four sodium are all dissolved; (2), to add mass ratio in the plastic tank be 0.024～0.6 ‰ concentrated nitric acid, stirred 10 minutes with agitator, namely obtain for the environment-friendly type leacheate of administering heavy-metal contaminated soil.
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| CN201310229897.0A CN103320139B (en) | 2013-06-09 | 2013-06-09 | A kind of environment-friendly type leacheate for administering heavy-metal contaminated soil |
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| CN103320139B CN103320139B (en) | 2016-06-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107011196A (en) * | 2017-05-09 | 2017-08-04 | 上海应用技术大学 | A kind of recovery method of environment-friendly type IDS Soil leaching agent |
| CN110681687A (en) * | 2018-07-06 | 2020-01-14 | 周丽娴 | Neutral soil heavy metal cleaning agent and cleaning method thereof |
| CN112063386A (en) * | 2020-09-25 | 2020-12-11 | 中科院过程工程研究所南京绿色制造产业创新研究院 | Layered double-metal hydroxide composite material and preparation method and application thereof |
| CN115651665A (en) * | 2022-10-24 | 2023-01-31 | 四川正升环保科技有限公司 | Lead-polluted soil remediation agent, application thereof and method for remediating lead-polluted soil |
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| US6107518A (en) * | 1997-04-04 | 2000-08-22 | Bayer Aktiengesellschaft | Preparation and use of iminodisuccinic acid salts |
| JP2002052375A (en) * | 2000-08-09 | 2002-02-19 | Kurita Water Ind Ltd | Treatment agent for heavy metals in heavy metal- polluted soil or waste and heavy metal treatment method |
| CN1356308A (en) * | 2001-12-06 | 2002-07-03 | 天津大学 | Process for preparing chelating agent of iminobisuccinate |
| KR101196987B1 (en) * | 2012-06-15 | 2012-11-05 | 주식회사 그린솔루션 | Method for Ex-situ Restoration of Contaminated Soil |
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2013
- 2013-06-09 CN CN201310229897.0A patent/CN103320139B/en active Active
Patent Citations (5)
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| US6107518A (en) * | 1997-04-04 | 2000-08-22 | Bayer Aktiengesellschaft | Preparation and use of iminodisuccinic acid salts |
| JP2002052375A (en) * | 2000-08-09 | 2002-02-19 | Kurita Water Ind Ltd | Treatment agent for heavy metals in heavy metal- polluted soil or waste and heavy metal treatment method |
| CN1356308A (en) * | 2001-12-06 | 2002-07-03 | 天津大学 | Process for preparing chelating agent of iminobisuccinate |
| KR101196987B1 (en) * | 2012-06-15 | 2012-11-05 | 주식회사 그린솔루션 | Method for Ex-situ Restoration of Contaminated Soil |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107011196A (en) * | 2017-05-09 | 2017-08-04 | 上海应用技术大学 | A kind of recovery method of environment-friendly type IDS Soil leaching agent |
| CN110681687A (en) * | 2018-07-06 | 2020-01-14 | 周丽娴 | Neutral soil heavy metal cleaning agent and cleaning method thereof |
| CN112063386A (en) * | 2020-09-25 | 2020-12-11 | 中科院过程工程研究所南京绿色制造产业创新研究院 | Layered double-metal hydroxide composite material and preparation method and application thereof |
| CN115651665A (en) * | 2022-10-24 | 2023-01-31 | 四川正升环保科技有限公司 | Lead-polluted soil remediation agent, application thereof and method for remediating lead-polluted soil |
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| CN103320139B (en) | 2016-06-15 |
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Effective date of registration: 20170504 Address after: 050000, No. 6, Jing Lian street, recycling chemical industry zone, Shijiazhuang, Hebei Patentee after: HEBEI XIETONG ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. Address before: 110044 Liaoning Province, Shenyang City District wanghuanan Street No. 21 Patentee before: Shenyang Univ. |
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Effective date of registration: 20210811 Address after: 050000 No.6, Shilian middle street, circular chemical industry park, Shijiazhuang City, Hebei Province Patentee after: Hebei Xieli Chemical Co.,Ltd. Address before: 050000 No. 6, Shilian middle street, circular chemical park, Shijiazhuang City, Hebei Province Patentee before: HEBEI XIETONG ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |