CN110143838A - A kind of compound leacheate and preparation process of the remediating lead-contaminated soil that soil fertility can be improved - Google Patents
A kind of compound leacheate and preparation process of the remediating lead-contaminated soil that soil fertility can be improved Download PDFInfo
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- CN110143838A CN110143838A CN201910248486.3A CN201910248486A CN110143838A CN 110143838 A CN110143838 A CN 110143838A CN 201910248486 A CN201910248486 A CN 201910248486A CN 110143838 A CN110143838 A CN 110143838A
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- Prior art keywords
- compound
- soil
- compound leacheate
- leacheate
- urea
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Soil Sciences (AREA)
- Pest Control & Pesticides (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of compound leacheate of remediating lead-contaminated soil that soil fertility can be improved, the compound leacheate includes: choline chloride, urea and water, and the molar ratio of the choline chloride, the urea and water is 1 ~ 2:2 ~ 3:2.Compound leacheate of the invention can reach 85% ~ 93% to the removal rate of lead in soil.The structure and pH value of soil are constant after elution, the content raising more preceding than elution of total nitrogen, total organic carbon, rapid available phosphorus.Compound leacheate of the invention is nontoxic, degradable, and remaining compound leacheate will not cause secondary pollution to soil environment.
Description
Technical field
The present invention relates to soil remediation and pollution processing technology field, specially a kind of reparation lead that soil fertility can be improved
The compound leacheate and preparation process of contaminated soil.
Background technique
In existing site remediation technology, can remove cadmium, fundamentally the method for rehabilitating soil include elution method, it is electronic
Repairing method and biological separation method.Elution method is that heavy metal is shifted from solid phase of soil using the desorption and dissolution of chemical reagent
Into liquid phase, has the advantages that removal rate is high, reparation speed is fast, low energy consumption, easy to operate, at low cost, treating capacity is big, have
Widely apply example.But currently used eluent all haves the shortcomings that respective: inorganic acid and oxidant break soil property
Bad larger, the inorganic eluents such as FeCl3 will cause soil fertility reduction, and the artificial chelating agents such as EDTA are not easily decomposed, can cause two
Secondary pollution, the natural organic acids efficiency such as citric acid is lower, and the novel eluent such as saponin, nano material is expensive.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of compound leacheate of remediating lead-contaminated soil that soil fertility can be improved
And preparation process.
The technical solution of the present invention is to provide a kind of compound leacheate of remediating lead-contaminated soil that soil fertility can be improved,
It is characterized in that, the compound leacheate includes: choline chloride, urea and water, the choline chloride, the urea and water rub
You are than being 1 ~ 2:2 ~ 3:2.
Further, the molar ratio of the choline chloride, the urea and water is 1:2:2.
Further, the compound leacheate includes organic acid, and the pH of compound leacheate is made by the addition of organic acid
Value is 5 ~ 6.
Further, the organic acid is oxalic acid or citric acid.
Further, the compound leacheate further includes having iron chloride.
A kind of preparation process of compound leacheate, which is characterized in that the technique includes the following steps:
It (1) is that 1 ~ 2:2 ~ 3:2 is mixed to obtain solution with molar ratio by choline chloride, urea, water；
(2) cooling to form solvent after 2h being heated at 80 DEG C of solution；
(3) organic acid is added makes solution pH 5 ~ 6；
(4) adding iron chloride makes 0.2 ~ 0.4 mol/L of concentration to get compound leacheate is arrived.
Further, in the step (1), the molar ratio of the choline chloride, the urea and water is preferably 1:2:2.
Further, in the step (3), the organic acid is preferably oxalic acid or citric acid.
The beneficial effects of the present invention are: a kind of compound leaching of remediating lead-contaminated soil that soil fertility can be improved of the invention
Washing lotion can reach 85% ~ 93% to the removal rate of lead in soil.The structure and pH value of soil are constant after elution, total nitrogen, total organic carbon,
The content of rapid available phosphorus before elution than improving.Compound leacheate of the invention is nontoxic, degradable, and remaining compound leacheate is not
Secondary pollution can be caused to soil environment.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Specific embodiment is closed, the present invention is further explained.
A kind of compound leacheate of remediating lead-contaminated soil that soil fertility can be improved of the invention, the compound leacheate
It include: choline chloride, urea and water, the molar ratio of the choline chloride, the urea and water is 1 ~ 2:2 ~ 3:2.
Further, the molar ratio of the choline chloride, the urea and water is 1:2:2.
According to some embodiments of the invention, the compound leacheate includes organic acid, is made by the addition of organic acid multiple
The pH value for closing leacheate is 5 ~ 6；The organic acid is oxalic acid or citric acid.
In other embodiments of the invention, the compound leacheate further includes having iron chloride.
The embodiment of the invention also provides a kind of preparation process of compound leacheate, the technique includes the following steps:
It (1) is that 1 ~ 2:2 ~ 3:2 is mixed to obtain solution with molar ratio by choline chloride, urea, water；
(2) cooling to form solvent after 2h being heated at 80 DEG C of solution；
(3) organic acid is added makes solution pH 5 ~ 6；
(4) adding iron chloride makes 0.2 ~ 0.4 mol/L of concentration to get compound leacheate is arrived.
In a preferred embodiment of the present invention, in the step (1), mole of the choline chloride, the urea and water
Than being preferably 1:2:2.
In a preferred embodiment of the present invention, in the step (3), the organic acid is preferably oxalic acid or citric acid.
Choline chloride, urea, water are mixed with special ratios, can form a kind of solvent of stable, the similar one-component of property,
Eutectic solvent.Eutectic solvent is acidified, adds iron chloride, while may be implemented efficiently to elute lead, soil will not be destroyed
The property and ecological functions of earth.
Technical scheme is described further combined with specific embodiments below, it is to be understood that the present invention
It is not limited to following embodiment:
Embodiment 1:
Topsoil (0-20cm) in paddy field is eluted, lead concentration is 9.25mg/kg, the compound leacheate of oxalic acid in soil
PH=6, ferric chloride concn are 0.2 mol/L, and liquid soil compares for 2:1, elutes time 2h, and the removal rate of lead is 93% in soil.
Embodiment 2:
The topsoil (0-20cm) of factory's contaminated site is eluted, lead concentration is 726 mg/kg in soil, and citric acid is compound
Leacheate pH=5, ferric chloride concn are 0.4 mol/L, and liquid soil compares for 3:1, elute 4 h of time, the removal rate of lead is in soil
85%。
Above embodiments are only the one such embodiment of the present invention, and the description thereof is more specific and detailed, but can not
Therefore limitations on the scope of the patent of the present invention are interpreted as.It should be pointed out that for those of ordinary skill in the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection model of the invention
It encloses.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (8)
1. a kind of compound leacheate for the remediating lead-contaminated soil that soil fertility can be improved, which is characterized in that the compound elution
Liquid includes: choline chloride, urea and water, and the molar ratio of the choline chloride, the urea and water is 1 ~ 2:2 ~ 3:2.
2. compound leacheate according to claim 1, it is characterised in that: the choline chloride, the urea and water rub
You are than being 1:2:2.
3. compound leacheate according to claim 1, it is characterised in that: the compound leacheate includes organic acid, is led to
The addition for crossing organic acid makes the pH value 5 ~ 6 of compound leacheate.
4. compound leacheate according to claim 3, it is characterised in that: the organic acid is oxalic acid or citric acid.
5. compound leacheate according to claim 1, it is characterised in that: the compound leacheate further includes having iron chloride.
6. a kind of preparation process of compound leacheate, which is characterized in that the technique includes the following steps:
It (1) is that 1 ~ 2:2 ~ 3:2 is mixed to obtain solution with molar ratio by choline chloride, urea, water；
(2) cooling to form solvent after 2h being heated at 80 DEG C of solution；
(3) organic acid is added makes solution pH 5 ~ 6；
(4) adding iron chloride makes 0.2 ~ 0.4 mol/L of concentration to get compound leacheate is arrived.
7. preparation process according to claim 6, it is characterised in that: the choline chloride, described in the step (1)
The molar ratio of urea and water is preferably 1:2:2.
8. preparation process according to claim 6, it is characterised in that: in the step (3), the organic acid is preferably grass
Acid or citric acid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910248486.3A CN110143838A (en) | 2019-03-29 | 2019-03-29 | A kind of compound leacheate and preparation process of the remediating lead-contaminated soil that soil fertility can be improved |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910248486.3A CN110143838A (en) | 2019-03-29 | 2019-03-29 | A kind of compound leacheate and preparation process of the remediating lead-contaminated soil that soil fertility can be improved |
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| CN110143838A true CN110143838A (en) | 2019-08-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110915540A (en) * | 2019-12-30 | 2020-03-27 | 青岛冠中生态股份有限公司 | Slope ecological landscape protection method |
| CN112222181A (en) * | 2020-09-29 | 2021-01-15 | 上海第二工业大学 | Heavy metal lead contaminated soil remediation method based on deep eutectic solvent synthesized by choline chloride and malonic acid |
| CN112222180A (en) * | 2020-09-29 | 2021-01-15 | 上海第二工业大学 | Heavy metal lead contaminated soil remediation method based on choline chloride eutectic solvent |
| CN113735662A (en) * | 2021-08-26 | 2021-12-03 | 天水师范学院 | Low-eutectic solvent catalytic coupling mechanochemical activation livestock and poultry manure carbon sequestration emission reduction method |
| GB2611091A (en) * | 2021-09-27 | 2023-03-29 | Argo Natural Resources Ltd | Compositions and processes for the extraction of metals using non-aqueous solvents |
-
2019
- 2019-03-29 CN CN201910248486.3A patent/CN110143838A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110915540A (en) * | 2019-12-30 | 2020-03-27 | 青岛冠中生态股份有限公司 | Slope ecological landscape protection method |
| CN112222181A (en) * | 2020-09-29 | 2021-01-15 | 上海第二工业大学 | Heavy metal lead contaminated soil remediation method based on deep eutectic solvent synthesized by choline chloride and malonic acid |
| CN112222180A (en) * | 2020-09-29 | 2021-01-15 | 上海第二工业大学 | Heavy metal lead contaminated soil remediation method based on choline chloride eutectic solvent |
| CN113735662A (en) * | 2021-08-26 | 2021-12-03 | 天水师范学院 | Low-eutectic solvent catalytic coupling mechanochemical activation livestock and poultry manure carbon sequestration emission reduction method |
| GB2611091A (en) * | 2021-09-27 | 2023-03-29 | Argo Natural Resources Ltd | Compositions and processes for the extraction of metals using non-aqueous solvents |
| WO2023047139A1 (en) * | 2021-09-27 | 2023-03-30 | Argo Natural Resources Limited | Compositions and processes for the extraction of metals using non-aqueous solvents |
| GB2611091B (en) * | 2021-09-27 | 2023-12-06 | Argo Natural Resources Ltd | Compositions and processes for the extraction of metals using non-aqueous solvents |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190820 |
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