CN105885854A - Remediation agent for heavy metal contaminated soil - Google Patents
Remediation agent for heavy metal contaminated soil Download PDFInfo
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- CN105885854A CN105885854A CN201610223267.6A CN201610223267A CN105885854A CN 105885854 A CN105885854 A CN 105885854A CN 201610223267 A CN201610223267 A CN 201610223267A CN 105885854 A CN105885854 A CN 105885854A
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- 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
- C09K17/18—Prepolymers; Macromolecular compounds
- C09K17/32—Prepolymers; Macromolecular compounds of natural origin, e.g. cellulosic materials
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- 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
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07G—COMPOUNDS OF UNKNOWN CONSTITUTION
- C07G99/00—Subject matter not provided for in other groups of this subclass
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H99/00—Subject matter not provided for in other groups of this subclass, e.g. flours, kernels
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- 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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- Inorganic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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- Processing Of Solid Wastes (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention relates to a remediation agent for heavy metal contaminated soil, in particular to a remediation agent for heavy metal contaminated soil by adopting humic acid and a preparation method of the remediation agent and provides the humic acid remediation agent for treating the heavy metal contaminated soil to overcome defects in the prior art. The technical scheme adopted to solve the problems is as follows: the remediation agent for the heavy metal contaminated soil is the extracted humic acid which is insoluble under the acidic condition, particularly, the extracted humic acid is a mixture extracted and prepared from low-rank coal taken as a raw material and potassium hydroxide with an alkaline process, the content of potassium humate is required to be not lower than 50 wt%, and the pH is 8-9; preferentially, the content of potassium humate is higher than 60 wt%, and the extracted humic acid can also be combined with sepiolite.
Description
Technical field
The present invention relates to a kind of heavy-metal contaminated soil renovation agent, be specifically related to one and utilize humic acids process heavy metal-polluted
The renovation agent of dye soil and the preparation method of renovation agent.
Background technology
Heavy metal-polluted have a finger in every pie the environmental pollution caused by heavy metal or its compound.Mainly by mining, waste gas discharge, sewage
Irrigate and use caused by the anthropic factors such as heavy metals exceeding standard goods.Because mankind's activity causes the content of beary metal in environment to increase,
Beyond normal range, directly it is detrimental to health, and causes environmental quality to deteriorate.Heavy metal pollution and other organic compound
Pollute difference.Many organic compound can make harmfulness drop by the physics of nature own, chemistry or the purification of biology
Low or release.And heavy metal has enriching, it is difficult to degrade in the environment.At present China due to the exploitation of heavy metal, smelting,
In the course of processing, cause many heavy metals such as lead, hydrargyrum, cadmium, cobalt etc. to enter big gas and water, soil causes serious environmental pollution.Gold
Belong to organic compound (such as organic mercury, Organic leadP, organo-arsenic, organotin etc.) to be eager to excel than corresponding metal inorganic compound toxicity
Many；The metal of soluble state is bigger than the toxicity of particulate form metal again；Cr VI is bigger than trivalent chromium toxicity etc..Heavy metal can not
It is biodegradable, but there is bioaccumulation, can directly threaten higher organism to include the mankind.Heavy metal is energy and egg in human body
There is strong interaction in white matter and various enzyme, makes them lose activity, it is also possible to is enriched with in some organ of human body, as
Fruit exceedes the tolerant limit of human body, can cause human body acute poisoning, subacute poisoning, chronic poisoning etc., knows from experience people and makes
Become the biggest harm.
In water, the traditional treatment method of heavy metal includes that chemical precipitation method, ion exchange, activated carbon and silica gel are inhaled at present
Attached method and membrane separation process etc., but these method operating costs and cost of material are of a relatively high.Additionally relevant expert points out, with much money
Belonging to the pollution to soil and have irreversibility, polluted soil does not administer value, can only adjust varieties of plant and come in addition
Avoid.Therefore, bed mud heavy metal pollution of soil problem is increasingly subject to the attention of people.
Humic acids is the family macromolecule material being widely present in natural environment.The constituent unit of humic acids is by aromatic core even
The construction unit being connected into, has the functional groups such as simple phenolic hydroxyl group, quinonyl, carboxyl.It is combined into coordinate bond between construction unit
Little granule, in chemical constitution, identical granule is cross-linked into polymer of the same race by weak bond.Owing to humic acids contains several functions base
Group, such as carboxyl, alcoholic extract hydroxyl group, phenolic hydroxyl group, carbonyl and methoxyl group etc., therefore, has the highest reactivity, such as adsorption, network
Cooperation use, redox etc., it is possible to the metal ion in environment, oxide, mineral, organic and poisonous work
Contact scar thing etc. interacts.In an acidic solution, humic acids has and forms the ability of strong chelate with heavy metal ion, but
When p H-number is more than 6, forms humate, have stronger dissolubility, so being difficult to use as adsorbent.But p is H
Value declines, or forms insoluble humic acid salt, and solubility humic acids re-forms precipitation.Therefore, humic acids is utilized to remove water body
Or the heavy metal in soil, primarily solve the technical problem that to be exactly the deliquescent problem of humic acids.
The method obtaining insoluble humic acid in prior art is typically: be placed in Muffle furnace by the humic acids of solubility,
At 330 DEG C, heat 1h make its fast dewatering, decarboxylation, then with the CaCl of 2mol/L2Solution soaking 2h.With the nitric acid of 1mol/L
Sodium solution and first water cyclic washing, gained solid is dried at 80 DEG C, it is thus achieved that insoluble humic acid.This process side
Formula, is not suitable for processing on a large scale heavy-metal contaminated soil.On the one hand it is with solubility humic acids as raw material, and raw material is than directly
The cost using low-order coal wants height the most；On the other hand, in the humic acids after process, active group is mainly sulfonate groups and is broken
Bad, but specific surface area can increased, and relies primarily on physical absorption heavy metal and adsorbs, in water body, molecular motion
Migrating and be easier to, physisorption also can well complete the absorption of heavy metal.
Summary of the invention
The present invention is in order to overcome the deficiencies in the prior art, it is provided that a kind of humic acids for administering heavy-metal contaminated soil is repaiied
Multiple agent.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is: a kind of heavy-metal contaminated soil renovation agent,
Described renovation agent is for extracting humic acids, and described extraction humic acids is humic acids insoluble under acid condition.Concrete, described extraction
Humic acids is with low-order coal as raw material, uses the mixture that potassium hydroxide prepares with alkalinity extraction, it is desirable to potassium humate contains
It is 8-9 that amount is not less than 50wt%, pH.Preferably potassium humate content is higher than 60wt%.
Described renovation agent is applied in contaminated soil by the way of watering and executing, and major part potassium humate is by soil acid
Property neutralization, with flocculation form precipitate in soil formed humic acids granule.Described humic acids granule has richer
Rich network structure, specific surface area humic acids more insoluble than the acidity that same extracting method is directly prepared shows after being applied in soil
The specific surface area gone out exceeds about 10-15%.
Meanwhile, compared with the insoluble humic acid using high-temperature phase-change method to prepare, the extraction corruption obtained of the present invention is planted
Acid activity group does not has any destruction, and the activity of humic acids keeps complete.Meanwhile, bigger specific surface area also makes more living
Property center is exposed in pellet surface and mesh.The existence in these active center so that heavy metal ion complexation is with by force
It is main for spending higher chelated forms.
Further, owing to soil itself just has certain adsorption to metal ion, and the motion of soil Middle molecule is the most tired
Difficulty, simple physical absorption is extremely difficult to the adsorption effect as in water body.Meanwhile, the adsorbent added in soil is difficult to back
Receiving, the reversibility of physical absorption is relatively big, and adsorbed heavy metal easily frees and the change of matter does not occur.Chemisorbed pair
The absorption of heavy metal ion then has irreversibility, heavy metal ion is passivated in soil, it is to avoid " the two of heavy metal ion
Secondary free pollution ".
Heavy metal substance exists with variform in soil.Such as cadmium, has soluble cadmium ionic forms, insoluble sulfur
Cadmium and cadmium salt.In acid ground, soluble cadmium ion exists with free state, but meets alkali, forms insoluble hydroxide
Cadmium.Meet alkalescence potassium humate, be easily formed insoluble Cadmium hydrate. and humic acids cadmium, substitution reaction occur simultaneously, discharges potassium
Fertile.The cadmium ion of free state is passivated in soil.Along with the impact of around acid soil environment, the alkalescence reduction of renovation agent,
The precipitation of humic acids increases, and the major function of the electric double layer of humic acids is used for adsorbing water-insoluble cadmium sulfide and cadmium salt, belongs to molecule
Between act on.It it is irreversible reaction.And meerschaum adsorbs cadmium in acid condition, discharge calcium ions and magnesium ions, as fertilizer.Therefore rotten
Phytic acid and meerschaum reciprocal action, make heavy metal ion either sour environment or alkaline environment, all can form valence link firm
Water-insoluble state, and be solidificated in soil.Humic acids itself belongs to organic nutrient substance, has plant growth substance to make
With.Its most notable function is to improve the resistance of crop, in the competition absorption process to metal ion, is first potassium ion,
Followed by calcium ions and magnesium ions.Test proves, having under humic acid fertilizer existence condition, the cumulative function of crop heavy metal is the least,
Ensure that heavy metal ion does not enter people's crop and fruit and straw, block it and enter organism food chain.
Preferably, can by described extraction humic acids and meerschaum with the use of, meerschaum is part magnesium in acid ground
Can dissociate out, be of value to the content increasing magnesium in soil element, for the crop that magnesium demand is bigger, such as Oryza glutinosa, Semen Maydis, big
The yield and quality of the fruit such as the cereal crops such as bean and Fructus Mangifera Indicae, Arillus Longan, Fructus Litchi has good castering action.It addition, meerschaum
There is the strongest adsorptivity, and in acid ground, along with the increase of acid activation modification de-magging, pore structure is improved, specific surface area
Increasing further, adsorption strengthens.The absorption of meerschaum is mainly physical absorption, in the change of soil " moistening-to be dried "
Cheng Zhong, additionally it is possible to produce the effect of " gathering " heavy metal so that humic acids is heavy metal-passivated synergism.
Preferably, the mass ratio of humic acids (in terms of the quality of contained potassium humate) and meerschaum is extracted as 1-4:1.
The renovation agent of the present invention can be used alone.Best way is to combine fertilising, mixes with fertilizer during fertilising every time
After apply together.Consumption is preferred with the content extracting humic acids in renovation agent and the mixture of fertilizer for 30-45wt%.
In addition to the above, it is also possible to by the extraction humic acids for preparing after dissolving acid is heavy, obtain insoluble
Humic acids product.The using method of described insoluble humic acids is identical with said extracted humic acids.Its difference is only that, insoluble corruption is planted
Acid is applied in soil, directly works, without the process heavy through reaction wadding.Accordingly, formed by potassium humate acid is heavy
Humic acids granule be applied in soil, the space of granule can be affected by some.But there is not difference in the adsorption mechanism of the two
Different.
Concrete, scheme one: described renovation agent is insoluble humic acids；The preparation method of insoluble humic acids is: with low-order coal
For raw material, potassium hydroxide is used to be not less than the mixture of 50wt% with the potassium humate content that alkalinity extraction prepares；Described mixed
The pH of compound is 10-11；Being dissolved in water by described mixture, regulation pH is 8-9, precipitates potassium humate therein,
Then carry out concentrate drying, obtain the mixture of insoluble humic acids and solvable humate, be insoluble humic acids.
Scheme two: described renovation agent includes insoluble humic acids and meerschaum；Described insoluble humic acids and the consumption of meerschaum,
With the quality of the insoluble humic acids in insoluble humic acids and the mass ratio of meerschaum as 1-4:1；Described insoluble humic acids system
Preparation Method is: with low-order coal as raw material, and the potassium humate content using potassium hydroxide to prepare with alkalinity extraction is not less than
The mixture of 50wt%；The pH of described mixture is 10-11；Being dissolved in water by described mixture, regulation pH is 8-9, to wherein
Potassium humate precipitate, then carry out concentrate drying, obtain the mixing of insoluble humic acids and solvable humate
Thing, is insoluble humic acids.
Should be noted that " insoluble humic acids " described herein is different concepts from " insoluble humic acids ", " insoluble
Property humic acids " be after acid is adjusted, potassium humate precipitate the humic acids that formed." insoluble humic acids " plants for comprising insoluble corruption
The mixture of sour and solvable humate.
Low-order coal used in the present invention is weathered coal, brown coal or peat.
The renovation agent that the present invention uses, is suitable for the heavy-metal contaminated soil of rehabilitating soil slant acidity.Corruption is extracted with described
As a example by phytic acid, potassium humate therein major part wadding under the sour environment effect of soil is heavy, forms insoluble humic acids granule,
Described humic acids granule plays the effect that main absorption is heavy metal-passivated.Humic acids granule
Additionally the existence of humic acids granule also have improve Soil structure, improve loosing soil degree and oxygen content etc. effect.Extract
Possibly together with the fulvic acid of part facile hydrolysis, undissolved organic matter, a small amount of inorganic salt etc. in humic acids, have in raising soil
The content of organic matter, promotes well developed root system, improves utilization rate of fertilizer, improves the effects such as soil compaction.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
A kind of heavy-metal contaminated soil renovation agent, described renovation agent is extraction humic acids,
Described extraction humic acids is with low-order coal as raw material, and the potassium humate using potassium hydroxide to prepare with alkalinity extraction contains
The mixture of amount 50wt%；The pH of described extraction humic acids is 8.7.
Embodiment 2
A kind of heavy-metal contaminated soil renovation agent, described renovation agent is extraction humic acids,
Described extraction humic acids is with low-order coal as raw material, and the potassium humate using potassium hydroxide to prepare with alkalinity extraction contains
The mixture of amount 60wt%；The pH of described extraction humic acids is 9.
Embodiment 3
A kind of heavy-metal contaminated soil renovation agent, described renovation agent is extraction humic acids,
Described extraction humic acids is with low-order coal as raw material, and the potassium humate using potassium hydroxide to prepare with alkalinity extraction contains
The mixture of amount 65wt%；The pH of described extraction humic acids is 8.1.
Embodiment 4
A kind of heavy-metal contaminated soil renovation agent, described renovation agent includes extracting humic acids and meerschaum；Described extraction humic acids
With the consumption of meerschaum, with the mass ratio of the quality of extracting the potassium humate in humic acids and meerschaum as 4:1；
Described extraction humic acids is with low-order coal as raw material, and the potassium humate using potassium hydroxide to prepare with alkalinity extraction contains
Amount is not less than the mixture of 50wt%；The pH of described extraction humic acids is 8.8.
Embodiment 5
A kind of heavy-metal contaminated soil renovation agent, described renovation agent includes extracting humic acids and meerschaum；Described extraction humic acids
With the consumption of meerschaum, with the mass ratio of the quality of extracting the potassium humate in humic acids and meerschaum as 3:1；
Described extraction humic acids is with low-order coal as raw material, and the potassium humate using potassium hydroxide to prepare with alkalinity extraction contains
Amount is not less than the mixture of 50wt%；The pH of described extraction humic acids is 8.
Embodiment 6
A kind of heavy-metal contaminated soil renovation agent, described renovation agent includes extracting humic acids and meerschaum；Described extraction humic acids
With the consumption of meerschaum, with the mass ratio of the quality of extracting the potassium humate in humic acids and meerschaum as 1:1；
Described extraction humic acids is with low-order coal as raw material, and the potassium humate using potassium hydroxide to prepare with alkalinity extraction contains
Amount is not less than the mixture of 50wt%；The pH of described extraction humic acids is 9.
With the renovation agent in above-described embodiment 1-6 on probation in Pu'er tea tea place, Yunnan (before this tea place because of heavy metal and pesticide residual
Stay and exceed standard, not up to export quality testing standard), the results are shown in Table 1:
With the renovation agent product in above-described embodiment 3-6 for inhabitants of Yuxi City in Yunnan Province arsenic IA Vegetable Base, usage is with reference to upper
Stating the usage in tea place, Yunnan, after 1 year, water body reaches national drinking water standard.The vegetable of output reaches food security standard then.
Embodiment 7
A kind of heavy-metal contaminated soil renovation agent, described renovation agent is insoluble humic acids；The preparation method of insoluble humic acids is:
With low-order coal as raw material, the potassium humate content using potassium hydroxide to prepare with alkalinity extraction is not less than 50wt%'s
Mixture；The pH of described mixture is 10.5；
Being dissolved in water by described mixture, regulation pH is 8.6, precipitates potassium humate therein, then concentrates
It is dried, obtains the mixture of insoluble humic acids and solvable humate, be insoluble humic acids.
Embodiment 8
A kind of heavy-metal contaminated soil renovation agent, described renovation agent is insoluble humic acids；The preparation method of insoluble humic acids is:
With low-order coal as raw material, the potassium humate content using potassium hydroxide to prepare with alkalinity extraction is not less than 50wt%'s
Mixture；The pH of described mixture is 10；
Being dissolved in water by described mixture, regulation pH is 8, precipitates potassium humate therein, then carries out concentrating and does
Dry, obtain the mixture of insoluble humic acids and solvable humate, be insoluble humic acids.
Embodiment 9
A kind of heavy-metal contaminated soil renovation agent, described renovation agent is insoluble humic acids；The preparation method of insoluble humic acids is:
With low-order coal as raw material, the potassium humate content using potassium hydroxide to prepare with alkalinity extraction is not less than 50wt%'s
Mixture；The pH of described mixture is 11；
Being dissolved in water by described mixture, regulation pH is 9, precipitates potassium humate therein, then carries out concentrating and does
Dry, obtain the mixture of insoluble humic acids and solvable humate, be insoluble humic acids.
With the renovation agent in above-described embodiment 7-9 in the pot experiment of Jinzhong City, Shanxi Province, experiment soil in add cadmium from
Sub-250mg/kg, renovation agent is mixed thoroughly with Polluted Soil completely, plants Fructus Lycopersici esculenti and Capsicum annuum L. respectively, adds renovation agent every year for experiment soil
10%.First Year, fruit reaches content of heavy metal in foods standard.Rhizome exceeds standard.Second Year fruit and rhizome are the most up to standard.
Within 3rd year, fruit does not detects.
Embodiment 10
A kind of heavy-metal contaminated soil renovation agent, described renovation agent includes insoluble humic acids and meerschaum；Described insoluble humic acids
With the consumption of meerschaum, with the quality of the insoluble humic acids in insoluble humic acids and the mass ratio of meerschaum as 4:1；
Described insoluble humic acids preparation method is:
With low-order coal as raw material, the potassium humate content using potassium hydroxide to prepare with alkalinity extraction is not less than 50wt%'s
Mixture；The pH of described mixture is 1.5；
Being dissolved in water by described mixture, regulation pH is 8.5, precipitates potassium humate therein, then concentrates
It is dried, obtains the mixture of insoluble humic acids and solvable humate, be insoluble humic acids.
Embodiment 11
A kind of heavy-metal contaminated soil renovation agent, described renovation agent includes insoluble humic acids and meerschaum；Described insoluble humic acids
With the consumption of meerschaum, with the quality of the insoluble humic acids in insoluble humic acids and the mass ratio of meerschaum as 3:1；
Described insoluble humic acids preparation method is:
With low-order coal as raw material, the potassium humate content using potassium hydroxide to prepare with alkalinity extraction is not less than 50wt%'s
Mixture；The pH of described mixture is 10；
Being dissolved in water by described mixture, regulation pH is 8, precipitates potassium humate therein, then carries out concentrating and does
Dry, obtain the mixture of insoluble humic acids and solvable humate, be insoluble humic acids.
Embodiment 12
A kind of heavy-metal contaminated soil renovation agent, described renovation agent includes insoluble humic acids and meerschaum；Described insoluble humic acids
With the consumption of meerschaum, with the quality of the insoluble humic acids in insoluble humic acids and the mass ratio of meerschaum as 1:1；
Described insoluble humic acids preparation method is:
With low-order coal as raw material, the potassium humate content using potassium hydroxide to prepare with alkalinity extraction is not less than 50wt%'s
Mixture；The pH of described mixture is 11；
Being dissolved in water by described mixture, regulation pH is 9, precipitates potassium humate therein, then carries out concentrating and does
Dry, obtain the mixture of insoluble humic acids and solvable humate, be insoluble humic acids.
The present invention can summarize with other the concrete form without prejudice to the spirit or essential characteristics of the present invention.Therefore, nothing
Opinion is from the point of view of that, and the embodiment above of the present invention all can only be considered the description of the invention and can not limit invention,
Claims indicate the scope of the present invention, and the scope of the present invention is not pointed out in above-mentioned explanation, therefore, with the present invention
The suitable implication of claims and scope in any change, be all considered as being included within the scope of the claims.
Claims (7)
1. a heavy-metal contaminated soil renovation agent, it is characterised in that: described renovation agent is extraction humic acids,
Described extraction humic acids is with low-order coal as raw material, and the potassium humate using potassium hydroxide to prepare with alkalinity extraction contains
Amount is not less than the mixture of 50wt%；The pH of described extraction humic acids is 8-9.
2. a heavy-metal contaminated soil renovation agent, it is characterised in that: described renovation agent includes extracting humic acids and meerschaum；Institute
State extraction humic acids and the consumption of meerschaum, with the mass ratio of the quality of extracting the potassium humate in humic acids and meerschaum as 1-
4:1；
Described extraction humic acids is with low-order coal as raw material, and the potassium humate using potassium hydroxide to prepare with alkalinity extraction contains
Amount is not less than the mixture of 50wt%；The pH of described extraction humic acids is 8-9.
A kind of heavy-metal contaminated soil renovation agent the most according to claim 1 and 2, it is characterised in that: usage will be for repairing
After agent mixes with fertilizer, uniformly watering and impose in soil, the content extracting humic acids in the mixture of renovation agent and fertilizer is 30-
45wt%。
4. a heavy-metal contaminated soil renovation agent, it is characterised in that: described renovation agent is insoluble humic acids；Insoluble humic acids
Preparation method is:
With low-order coal as raw material, the potassium humate content using potassium hydroxide to prepare with alkalinity extraction is not less than 50wt%'s
Mixture；The pH of described mixture is 10-11；
Being dissolved in water by described mixture, regulation pH is 8-9, precipitates potassium humate therein, then concentrates
It is dried, obtains the mixture of insoluble humic acids and solvable humate, be insoluble humic acids.
5. a heavy-metal contaminated soil renovation agent, it is characterised in that: described renovation agent includes insoluble humic acids and meerschaum；Institute
State the consumption of insoluble humic acids and meerschaum, with quality and the quality of meerschaum of the insoluble humic acids in insoluble humic acids
Ratio is 1-4:1；
Described insoluble humic acids preparation method is:
With low-order coal as raw material, the potassium humate content using potassium hydroxide to prepare with alkalinity extraction is not less than 50wt%'s
Mixture；The pH of described mixture is 10-11；
Being dissolved in water by described mixture, regulation pH is 8-9, precipitates potassium humate therein, then concentrates
It is dried, obtains the mixture of insoluble humic acids and solvable humate, be insoluble humic acids.
6. according to a kind of heavy-metal contaminated soil renovation agent described in claim 4 or 5, it is characterised in that: usage will be for repairing
After agent mixes with fertilizer, uniformly ploughing and execute in soil, the content of insoluble humic acids is renovation agent with the mixture of fertilizer
30-45wt%。
7. according to a kind of heavy-metal contaminated soil renovation agent described in claim 1 or 2 or 4 or 5, it is characterised in that: described low
Rank coal is weathered coal, brown coal or peat.
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| CN201610223267.6A CN105885854A (en) | 2016-04-12 | 2016-04-12 | Remediation agent for heavy metal contaminated soil |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893114A (en) * | 2017-02-08 | 2017-06-27 | 中国环境科学研究院 | A kind of equipment for extracting soil humic acid full constituent |
| CN107311757A (en) * | 2017-07-06 | 2017-11-03 | 波普克国际生态科技（北京）有限公司 | Micropowders formula applied to the mineral humus mixture of arable land Heavy Metal Pollution Control |
| CN109943344A (en) * | 2019-04-13 | 2019-06-28 | 山西能源学院 | A kind of yam planting special-purpose soil modifying agent and preparation method |
| CN110272745A (en) * | 2019-07-04 | 2019-09-24 | 湖南科技大学 | A kind of humic acid heavy metal deactivator oxidation modification device and its application method |
| CN110484269A (en) * | 2019-08-20 | 2019-11-22 | 北京上水环境科技发展有限公司 | A kind of heavy-metal contaminated soil renovation agent and its preparation and application method |
| CN111793501A (en) * | 2020-08-06 | 2020-10-20 | 辜锐 | Soil conditioner and preparation method thereof |
| CN112574754A (en) * | 2020-12-19 | 2021-03-30 | 四川大学 | Passivator for repairing heavy metal polluted farmland soil and application method |
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| CN106893114A (en) * | 2017-02-08 | 2017-06-27 | 中国环境科学研究院 | A kind of equipment for extracting soil humic acid full constituent |
| CN107311757A (en) * | 2017-07-06 | 2017-11-03 | 波普克国际生态科技（北京）有限公司 | Micropowders formula applied to the mineral humus mixture of arable land Heavy Metal Pollution Control |
| CN109943344A (en) * | 2019-04-13 | 2019-06-28 | 山西能源学院 | A kind of yam planting special-purpose soil modifying agent and preparation method |
| CN110272745A (en) * | 2019-07-04 | 2019-09-24 | 湖南科技大学 | A kind of humic acid heavy metal deactivator oxidation modification device and its application method |
| CN110484269A (en) * | 2019-08-20 | 2019-11-22 | 北京上水环境科技发展有限公司 | A kind of heavy-metal contaminated soil renovation agent and its preparation and application method |
| CN111793501A (en) * | 2020-08-06 | 2020-10-20 | 辜锐 | Soil conditioner and preparation method thereof |
| CN112574754A (en) * | 2020-12-19 | 2021-03-30 | 四川大学 | Passivator for repairing heavy metal polluted farmland soil and application method |
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Application publication date: 20160824 |