CN101301658A - Eluent for repairing polluted soil and preparation thereof - Google Patents
Eluent for repairing polluted soil and preparation thereof Download PDFInfo
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- CN101301658A CN101301658A CNA2008100118648A CN200810011864A CN101301658A CN 101301658 A CN101301658 A CN 101301658A CN A2008100118648 A CNA2008100118648 A CN A2008100118648A CN 200810011864 A CN200810011864 A CN 200810011864A CN 101301658 A CN101301658 A CN 101301658A
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Abstract
The invention provides an eluent used for restoring polluted soil, comprising sulfonated thiacalix [4] arene, sodium hydroxide and water which respectively have the content (weight percentage) as follows: 5-10wt% of the sulfonated thiacalix [4] arene, 0.5-1wt% of the sodium hydroxide and 89-94.5wt% of the water. The preparation method comprises the following steps: (1) the sulfonated thiacalix [4] arene with the weight percentage of 5-10wt% is added into a beaker and the water with the weight percentage of 89-94.5wt% is then added into the beaker; the sulfonated thiacalix [4] arene and the water are mixed in the beaker for 1 hour so as to lead the sulfonated thiacalix[4] arene to be completely dissolved; (2) the sodium hydroxide with the weight percentage of 0.5-1wt% is added into the beaker and oscillated by ultrasonic for 30 minutes or mixed for 1 hour so as to obtain the eluent used for restoring the polluted soil. The eluent of the invention can wash and restore the soil polluted by heavy metal, also can wash and restore the soil polluted by organic matters, as well as avoid the loss of soil nutrient elements such as Ca and Mg, etc. when the soil polluted by the heavy metal is washed and restored.
Description
Technical field
The present invention relates to the contaminated soil recovery technique, particularly a kind of leacheate that is used for the drip washing repairing polluted soil and preparation method thereof.
Background technology
Soil is one of mankind's natural resources of depending on for existence.Yet global industrialization causes the pollutant that has genotoxic potential in a large number to enter soil by all means, the soil pollution problem that causes many countries all to be faced with to become increasingly conspicuous, and influence other surrounding mediums, and by the final harm humans health of food chain.Therefore, to the improvement of contaminated soil with repair and become China, so that the great environmental science problem in the world.
The reparation of contaminated soil has several different methods, mainly comprises methods such as physics reparation, chemistry reparation and biological restoration.Compare with other restorative procedures, chemical repair method has stable treatment effect, advantage such as thorough, is particularly useful for the improvement of serious pollution soil, therefore development early, method is also ripe relatively.And soil drip washing technology both can be used for restoration of soil polluted by heavy metal as one of important technical of chemical repair method, can be used for repairing organic polluted soil again, received much concern especially.Soil drip washing technology typically refers to by the liquid that can promote pollutant dissolving/migration in the soil environment or other fluids comes the drip washing contaminated soil, and the pollutant desorption that adsorbs or be fixed on the soil particle is dissolved and the technology of removal.And the selection of leacheate is the key factor that contaminated soil drip washing is repaired.
At present, leacheate mainly can be divided into acids leacheate, artificial chelating agent leacheate, artificial surface activating agent and biosurfactant leacheate etc.Usually the acids leacheate comprises inorganic acid and organic acid, and they can promote the dissolving wash-out of heavy metal in soil, thereby the drip washing reparation of heavy-metal contaminated soil is had effect preferably.But it is not because the acids leacheate can cause soil acidification, change the physicochemical property of soil, make a large amount of soil nutrient leaching losses, and destroy soil microaggregate structure, and good to the repairing effect of organic material contaminated soil.Artificial chelating agent such as EDTA, DTPA and NTA etc., owing to can form stable complex compound with many metal ion species, make it from soil particle surface desorption/dissolving, therefore artificial chelating agent leacheate is widely used in the drip washing reparation research and the practice of heavy-metal contaminated soil.But artificial chelating agent does not have the metal complex selectivity, and metallic element such as Ca, Mg etc. useful in some soil are also removed by complexing drip washing, thereby cause nutrient loss, and can be in the change that to a certain degree causes soil physics structure and chemical property.In addition, artificial chelating agent such as EDTA does not have combination to organic pollution, therefore can not repairing organic polluted soil.In recent years, artificial surface activating agent and biosurfactant leacheate are widely used in the reparation research of organic material contaminated soil.The basic principle of surfactant drip washing repairing organic polluted soil is by the reinforcement solubilising of surfactant and incremental effect, and organic pollution is in the solubility and the flowability of water, to reach the purpose of soil remediation in the enhancing soil.Studies show that artificial surface activating agent and biosurfactant leacheate all have elute effect preferably to persistent organic pollutants such as PAHs and PCBs.For the drip washing reparation of heavy-metal contaminated soil, the artificial surface activating agent is effect preferably not, though and biosurfactant has repairing effect, be subjected to the restriction of some conditions such as soil pH value, the content of organic matter, and effect is limited.
Therefore, seeking a kind ofly all has the novel leacheate of better drip washing effect to heavy metal and organic material contaminated soil, will be significant to the repairing and treating of contaminated soil.
Summary of the invention
The objective of the invention is for leacheate of a kind of repairing polluted soil and preparation method thereof is provided, this leacheate can the drip washing restoration of soil polluted by heavy metal, again can the drip washing repairing organic polluted soil, when the drip washing restoration of soil polluted by heavy metal, can avoid the loss of soil nutrient elements such as Ca, Mg.
The present invention is achieved through the following technical solutions:
A kind of leacheate of repairing polluted soil comprises sulfonation thia cup [4] aromatic hydrocarbons, NaOH and water.Its content (percentage by weight) is: sulfonation thia cup [4] aromatic hydrocarbons 5～10wt%; NaOH 0.5～1wt%, water 89～94.5wt%.
A kind of leacheate of repairing polluted soil can prepare as follows:
1. taking by weighing percentage by weight is sulfonation thia cup [4] aromatic hydrocarbons of 5～10wt%, and it is joined in the beaker, and adding percentage by weight in beaker is the water of 89～94.5wt%, stirs 1 hour, and sulfonation thia cup [4] aromatic hydrocarbons is all dissolved;
2. adding percentage by weight in beaker is the NaOH of 0.5～1wt%, and sonic oscillation 30 minutes or stirred 1 hour promptly obtains the leacheate of repairing polluted soil.
The leacheate active component that the present invention adopts is sulfonation thia cup [a 4] aromatic hydrocarbons, and it is the supermolecule acceptor compound of the similar cup of a kind of shape that obtained by the sulphur atom bridging by four p-sulfonic acid phenol, has better water solubility.The hydrophobic phenyl ring cavity of sulfonation thia cup [4] aromatic hydrocarbon molecule upper edge can be by pi-pi accumulation effect or hydrophobic interaction, the inclusion organic molecule.And its lower edge molecule cavity can rely on the collaborative coordination of phenol hydroxyl oxygen and bridging sulphur atom, soft acid class heavy metals (hsab theory) such as complexing Pb, Cd, Cu, Zn and Ni optionally, and do not have combination for hard acid class alkaline-earth metal such as Ca, Mg.Therefore, be the leacheate of active component with sulfonation thia cup [4] aromatic hydrocarbons, can the drip washing restoration of soil polluted by heavy metal, again can the drip washing repairing organic polluted soil.
The purpose that adds NaOH is that the adjusting leacheate is an alkalescent, makes the phenolic hydroxyl group ionization of sulfonation thia cup [4] aromatic hydrocarbon molecule lower edge be converted into phenol hydroxyl oxygen, thereby strengthens the complexing power of sulfonation thia cup [4] aromatic hydrocarbons to heavy metal.
Advantage of the present invention:
1. can the drip washing restoration of soil polluted by heavy metal, again can the drip washing repairing organic polluted soil.Because sulfonation thia cup of the present invention [4] aromatic hydrocarbons active component, can the inclusion organic molecule, again can the complexing heavy metal.Therefore, prepared leacheate be a kind of can the drip washing restoration of soil polluted by heavy metal, leacheate that again can the drip washing repairing organic polluted soil.
2. when the drip washing restoration of soil polluted by heavy metal, can avoid the loss of soil nutrient elements such as Ca, Mg.Because sulfonation thia cup [4] aromatic hydrocarbons has good complexing to soft acid class heavy metals such as Pb, Cd, Cu, Zn and Ni, and hard acid class alkaline-earth metal such as Ca, Mg are not had combination.Therefore, use drip washing restoration of soil polluted by heavy metal of the present invention, can avoid Ca
2+, Mg
2+Loss etc. soil nutrient elements.
The specific embodiment
Embodiment 1
A kind of leacheate of repairing polluted soil comprises sulfonation thia cup [4] aromatic hydrocarbons, NaOH and water.Its content is: sulfonation thia cup [4] aromatic hydrocarbons 5g; NaOH 0.5g; Water 94.5g.
Its preparation method:
1. take by weighing 5g sulfonation thia cup [4] aromatic hydrocarbons, it is joined in the beaker, in beaker, add the water of 94.5g, stirred 1 hour, sulfonation thia cup [4] aromatic hydrocarbons is all dissolved;
2. the NaOH that adds 0.5g in beaker, sonic oscillation 30 minutes or stirred 1 hour promptly obtains the leacheate 100g of repairing polluted soil.
Embodiment 2
A kind of leacheate of repairing polluted soil comprises sulfonation thia cup [4] aromatic hydrocarbons, NaOH and water.Its content is: sulfonation thia cup [4] aromatic hydrocarbons 10g; NaOH 1g; Water 89g.
Its preparation method:
1. take by weighing 10g sulfonation thia cup [4] aromatic hydrocarbons, it is joined in the beaker, in beaker, add the water of 89g, stirred 1 hour, sulfonation thia cup [4] aromatic hydrocarbons is all dissolved;
2. the NaOH that adds 1g in beaker, sonic oscillation 30 minutes or stirred 1 hour promptly obtains the leacheate 100g of repairing polluted soil.
Embodiment 3
A kind of leacheate of repairing polluted soil comprises sulfonation thia cup [4] aromatic hydrocarbons, NaOH and water.Its content is: sulfonation thia cup [4] aromatic hydrocarbons 7g; NaOH 0.7g; Water 92.3g.
Its preparation method:
1. take by weighing 7g sulfonation thia cup [4] aromatic hydrocarbons, it is joined in the beaker, in beaker, add the water of 92.3g, stirred 1 hour, sulfonation thia cup [4] aromatic hydrocarbons is all dissolved;
2. the NaOH that adds 0.7g in beaker, sonic oscillation 30 minutes or stirred 1 hour promptly obtains the leacheate 100g of repairing polluted soil.
Embodiment 4
A kind of leacheate of repairing polluted soil comprises sulfonation thia cup [4] aromatic hydrocarbons, NaOH and water.Its content is: sulfonation thia cup [4] aromatic hydrocarbons 9g; NaOH 0.7g; Water 90.3g.
Its preparation method:
1. take by weighing 9g sulfonation thia cup [4] aromatic hydrocarbons, it is joined in the beaker, in beaker, add the water of 90.3g, stirred 1 hour, sulfonation thia cup [4] aromatic hydrocarbons is all dissolved;
2. the NaOH that adds 0.7g in beaker, sonic oscillation 30 minutes or stirred 1 hour promptly obtains the leacheate 100g of repairing polluted soil.
Claims (2)
1, leacheate of a kind of repairing polluted soil and preparation method thereof, it is characterized in that: a kind of leacheate of repairing polluted soil comprises sulfonation thia cup [4] aromatic hydrocarbons, NaOH and water, and its content (percentage by weight) is: sulfonation thia cup [4] aromatic hydrocarbons 5～10wt%; NaOH 0.5～1wt%, water 89～94.5wt%.
2, leacheate of a kind of repairing polluted soil according to claim 1 and preparation method thereof is characterized in that: the preparation method of the leacheate of repairing polluted soil is:
(1), take by weighing sulfonation thia cup [4] aromatic hydrocarbons that percentage by weight is 5～10wt%, it is joined in the beaker, adding percentage by weight in beaker is the water of 89～94.5wt%, stirs 1 hour, and sulfonation thia cup [4] aromatic hydrocarbons is all dissolved;
(2), to add percentage by weight in beaker be the NaOH of 0.5～1wt%, sonic oscillation 30 minutes or stirred 1 hour promptly obtains the leacheate of repairing polluted soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100118648A CN101301658B (en) | 2008-06-16 | 2008-06-16 | Eluent for repairing polluted soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100118648A CN101301658B (en) | 2008-06-16 | 2008-06-16 | Eluent for repairing polluted soil |
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| CN101301658A true CN101301658A (en) | 2008-11-12 |
| CN101301658B CN101301658B (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100118648A Expired - Fee Related CN101301658B (en) | 2008-06-16 | 2008-06-16 | Eluent for repairing polluted soil |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188951A (en) * | 2011-05-13 | 2011-09-21 | 沈阳大学 | Water body pollutant adsorbing material |
| CN102218445A (en) * | 2011-05-13 | 2011-10-19 | 沈阳大学 | Ultrasonic leaching method for restoring organic contaminated soils |
| CN102225425A (en) * | 2011-04-29 | 2011-10-26 | 沈阳大学 | Leaching method for remedying heavy metal-polluted soil |
| CN103706629A (en) * | 2013-12-20 | 2014-04-09 | 四川农业大学 | Method for removing cadmium in contaminated soil through watermelon peel leaching |
| CN104437384A (en) * | 2014-11-05 | 2015-03-25 | 沈阳大学 | Compound modified bentonite |
| CN105176540A (en) * | 2015-11-02 | 2015-12-23 | 张作玮 | Preparation method of leacheate capable of repairing soil polluted by organic matter |
| CN105170632A (en) * | 2015-09-30 | 2015-12-23 | 河南行知专利服务有限公司 | Method for recovering heavy metal contaminated soil through magnetotactic bacteria and chlorophytum comosum together |
| CN105199742A (en) * | 2015-11-02 | 2015-12-30 | 张作玮 | Leaching liquid for repairing soil polluted by organic matters |
-
2008
- 2008-06-16 CN CN2008100118648A patent/CN101301658B/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225425A (en) * | 2011-04-29 | 2011-10-26 | 沈阳大学 | Leaching method for remedying heavy metal-polluted soil |
| CN102225425B (en) * | 2011-04-29 | 2013-01-30 | 沈阳大学 | Leaching method for remedying heavy metal-polluted soil |
| CN102188951A (en) * | 2011-05-13 | 2011-09-21 | 沈阳大学 | Water body pollutant adsorbing material |
| CN102218445A (en) * | 2011-05-13 | 2011-10-19 | 沈阳大学 | Ultrasonic leaching method for restoring organic contaminated soils |
| CN102218445B (en) * | 2011-05-13 | 2013-01-09 | 沈阳大学 | Ultrasonic leaching method for restoring organic contaminated soils |
| CN102188951B (en) * | 2011-05-13 | 2013-05-29 | 沈阳大学 | Water body pollutant adsorbing material |
| CN103706629A (en) * | 2013-12-20 | 2014-04-09 | 四川农业大学 | Method for removing cadmium in contaminated soil through watermelon peel leaching |
| CN103706629B (en) * | 2013-12-20 | 2017-01-25 | 四川农业大学 | Method for removing cadmium in contaminated soil through watermelon peel leaching |
| CN104437384A (en) * | 2014-11-05 | 2015-03-25 | 沈阳大学 | Compound modified bentonite |
| CN105170632A (en) * | 2015-09-30 | 2015-12-23 | 河南行知专利服务有限公司 | Method for recovering heavy metal contaminated soil through magnetotactic bacteria and chlorophytum comosum together |
| CN105176540A (en) * | 2015-11-02 | 2015-12-23 | 张作玮 | Preparation method of leacheate capable of repairing soil polluted by organic matter |
| CN105199742A (en) * | 2015-11-02 | 2015-12-30 | 张作玮 | Leaching liquid for repairing soil polluted by organic matters |
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| Publication number | Publication date |
|---|---|
| CN101301658B (en) | 2010-12-08 |
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Granted publication date: 20101208 Termination date: 20110616 |