CN108003875A - A kind of stabilization material for heavy metal soil remediation and preparation method thereof - Google Patents
A kind of stabilization material for heavy metal soil remediation and preparation method thereof Download PDFInfo
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- CN108003875A CN108003875A CN201711218194.2A CN201711218194A CN108003875A CN 108003875 A CN108003875 A CN 108003875A CN 201711218194 A CN201711218194 A CN 201711218194A CN 108003875 A CN108003875 A CN 108003875A
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- slag
- heavy metal
- stabilization material
- stabilization
- aqueous solution
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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
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/06—Calcium compounds, e.g. lime
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of stabilization material for heavy metal soil remediation, the stabilization material includes slag raw material and phosphate aqueous solution, and the mass volume ratio of the slag raw material and phosphate aqueous solution is not more than 100g/mL.The present invention further discloses a kind of Preparation method and use of the stabilization material for heavy metal soil remediation.Stabilization material in the present invention by the use of converter drum slag as heavy-metal contaminated soil reparation, it is relatively simple in technique, the new way of converter drum slag comprehensive utilization can either be opened up, explores new road for China's slag comprehensive utilization, and can turn waste into wealth.
Description
Technical field
The invention belongs to contaminated soil Treatment process field, and in particular to a kind of stabilisation for heavy metal soil remediation
Material and preparation method thereof.
Background technology
In recent years, China's industrial production causes environment substantial amounts of pollution, the particularly higher soil pollution of concealment
Problem increasingly shows.Heavy metal pollution of soil due to can cumulative effect health and attract attention.Environmental protection in 2014
Portion and Ministry of Land and Resources《National Investigation of Soil Pollution publication》The results show：Cadmium in national soil, mercury, arsenic, copper, lead, chromium, zinc,
8 kinds of inorganic pollution object point position exceeding standard rates of nickel are respectively 7.0%, 1.6%, 2.7%, 2.1%, 1.5%, 1.1%, 0.9%,
4.8%.In 775 soil point positions of 81 pieces of Industrial Wastelands of investigation, super punctuation bit accounts for 34.9%, and major pollutants are
Zinc, mercury, lead, chromium, arsenic and polycyclic aromatic hydrocarbon, relate generally to the industries such as chemical industry, mining industry, Metallurgy Industry.
At present, mainly have for the recovery technique of heavy-metal contaminated soil：Isolate embedding techniques, fixing-stable technology,
Chemical stabilization technology, microorganism remediation and plant extract technology etc..Since microorganism and plant extract technology repairing efficiency are long, change
It is always heavy metal to learn factor, the solidification and stabilizations such as stabilization technique is big to soil fail, isolation embedding techniques construction volume is larger
The major measure of pollution amelioration, particularly stabilization technology, select cost-effective medicament to make soil in the base kept intact
Pollution problem is repaired on plinth.At present, main heavy metal stabilization medicament with adsorb class medicament and chemical reaction class medicament based on,
Such as bentonite, sepiolite, attapulgite, potassium dihydrogen phosphate, sulfide, rock phosphate in powder.
At present, need to consume the substantial amounts of energy and natural resources in natural minerals stabilization material production preparation process, break
The waste of resource is caused while bad environment；Such as：Phosphatic source is substantially generated with substance reactions such as rock phosphate in powder and sulfuric acid,
A large amount of pollutions are easily produced in ore extraction and chemical process, and easily cause the excessively exploitation of resource.And chemistry is anti-
The medicament of class is answered since cost is higher, chemical reaction is vulnerable to environment influence, so as to limit its use, such as metal-chelator not
Only reaction is vulnerable to condition limitation, and expensive.From the point of view of comprehensive existing situation, chemical drug is stablized to heavy metal in soil at present
The research of agent is also deficienter.
The content of the invention
In view of the foregoing deficiencies of prior art, it is an object of the invention to provide one kind to be used for heavy metal soil remediation
Stabilization material and preparation method thereof, for solving the deficiency present in existing remediation of heavy metal-contaminated soil
Place, there is provided it is a kind of using converter slag, phosphoric acid as the stabilization material of raw material, find effective way for the reparation of heavy metal soil
Footpath.
To achieve these goals or other purposes, the present invention is achieved by the following technical solutions.
A kind of stabilization material for heavy metal soil remediation, the stabilization material include slag raw material and phosphoric acid water
Solution, the mass volume ratio of the slag raw material and phosphate aqueous solution are not more than 100g/mL.
Further, the mass volume ratio of the slag raw material and phosphate aqueous solution is 33g/mL~100g/mL.It is preferred that
Ground, the mass volume ratio of the slag raw material and phosphate aqueous solution is 33g/mL.
Further, the concentration of the phosphate aqueous solution is 14~15mol/L.Preferably, the phosphate aqueous solution is dense
Spend for 14.63mol/L.
Further, the slag raw material is to be more than 200 by the steel-making slag powder of milling processing, the fineness of the steel-making slag powder
Mesh.Preferably, the fineness of the steel-making slag powder is 200~300 mesh.
Further, the slag raw material is selected from converter drum slag, by upper marine smelting environmental project Science and Technology Ltd.
There is provided.
Further, the free calcium oxide content of the converter drum slag is that specific surface area is no more than 0.5%
5.011-5.889m2/ g, pore volume are not more than 0.031mL/g, aperture 20-25.41nm.
Preferably, the free calcium oxide of the converter drum slag is 0%, specific surface area 5.289m2/ g, pore volume are
0.031mL/g, aperture 25.41nm.
Present invention also offers a kind of preparation method of the stabilization material for heavy metal soil remediation, by slag raw material
It is mixed and reacts with phosphate aqueous solution, be granulated after reaction, is dried, milling processing, up to stabilization material.
Preferably, mixer can be used to carry out during stirring.Preferably, it is the convention stir time the time required to the stirring,
Further, it is 10~15min the time required to the stirring.
Preferably, it is granulated and uses wet granulation, instrument is using DIOSNA companies of Germany mixing wet granulator P1-6.
Preferably, after granulation, drying, milling processing to fineness is 100~200 mesh.
Processing is modified to converter drum steel-making slag powder using phosphoric acid in the present invention, is granulated after the completion of reaction, is dried
After milling processing, gained particulate matter has great pore structure and surface area.Converter drum slag after phosphoric acid modification is one
A material with porosity and certain silicate content, into after soil system, due to porous feature, pollutant can
In the gap for smoothly entering converter drum steel-making slag powder.Meanwhile the silicate in converter drum slag micro powder is in liquid phase of soil
Middle cation M2+、N+Aquation can be far longer than SiO4 4-And AlO4 5-Aquation energy, so M2+、N+Ion is preferentially dissolved into body
System, so that each surface of converter drum slag is negatively charged, each surface of converter drum slag can be attracted to by electrostatic attraction
So as to be removed.In addition, silicate granules surface can form hydrous oxide coating-SiOH with water, surface occurs with Ni
Coordination.Converter drum slag can also produce anion and produce co-precipitation with pollution element by the dissolution of itself
Effect, and achieve the purpose that stable pollutant.The use of phosphoric acid at the same time, introduces phosphate radical, and it is dirty further to increase remediating heavy metal
The effect of dye.
The invention discloses a kind of stabilization material described above for heavy metal soil remediation to administer huge sum of money dependent territory
Purposes in earth pollution.
Preferably, in use, stabilization material is added in heavy metal soil, it is mixed evenly, natural curing is
Can, wherein the stabilization material and the mass ratio of heavy metal soil are 10%-20%.
Preferably, natural curing >=28 day.
Preferably, the mass ratio of the stabilization material and heavy metal soil is 15%.
In summary, a kind of stabilization material for heavy metal soil remediation of the invention and preparation method thereof, has
Following technique effect：
1) stabilization material disclosed in this invention for heavy metal soil remediation, converter drum slag raw material is carried out
Phosphoric acid processing after, easy dissolution and the ion being harmful to soil in converter drum slag can be removed to a certain extent, as Fe, Mn,
Al etc..Meanwhile phosphoric acid processing procedure can improve the purity of converter drum slag micro powder stabilization material, converter drum steel is reduced
The usage amount of slag micro mist, can also reduce certain construction volume in practical application engineering, save the input of energy resource.
2) the converter drum slag employed in the present invention has as a kind of material loose porous, specific surface area is big
Stronger adsorption capacity；The silicate contained at the same time and the anion decomposed can also match somebody with somebody with heavy metal generation ion exchange, surface
The effects such as position, co-precipitation, the common validity for reducing heavy metal in soil.After converter drum slag carries out acidification, energy
The impurity in converter drum slag gap and surface is enough removed, largely increases specific surface area and pore structure, improves and stablizes
Change the touch opportunity of material and pollutant, improve reaction efficiency, heavy metal is adsorbed beneficial to slag.By using the stabilization of the present invention
Change the heavy-metal contaminated soil of material reparation, the Leaching of heavy metal in soil meets GB5085.3-2007《Danger wastes
Judging standard-leaching characteristic identification》In regulation.
3) current existing stabilization material or expensive, or material are taken from natural minerals, easily cause environmental pollution
With resource exhaustive exploitation.And the stabilisation material of heavy-metal contaminated soil reparation is used as in the present invention by the use of converter drum slag
Expect, it is relatively simple in technique, the new way of converter drum slag comprehensive utilization can either be opened up, is visited for China's slag comprehensive utilization
Rope goes out new road, and can turn waste into wealth.
Embodiment
Illustrate embodiments of the present invention below by way of particular specific embodiment, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.The present invention can also be by addition different specific
Embodiment is embodied or practiced, and the various details in this specification can also be based on different viewpoints and application, not carry on the back
Various modifications or alterations are carried out under spirit from the present invention.
It should be noted that in the case where there is no conflict, the feature in following embodiments and embodiment can be mutually combined.Also
It should be appreciated that the term used in the embodiment of the present invention is to describe specific specific embodiment, rather than in order to limit
Protection scope of the present invention.The test method of actual conditions is not specified in the following example, usually according to normal condition, or presses
According to the condition proposed by each manufacturer.
When embodiment provides number range, it should be appreciated that except non-invention is otherwise noted, two ends of each number range
Any one numerical value can be selected between point and two endpoints.Unless otherwise defined, in the present invention all technologies for using and
Scientific terminology and grasp of the those skilled in the art to the prior art and the record of the present invention, can also use and this hair
Any method, equipment and the material of the similar or equivalent prior art of method, equipment described in bright embodiment, material is realized
The present invention.
Embodiment 1
A kind of stabilization material for heavy metal soil remediation, converter drum slag is handled by milling, fineness is big
It is stabilization material in 200 mesh.
Embodiment 2
A kind of stabilization material for heavy metal soil remediation, including converter drum slag and phosphate aqueous solution, wherein,
The concentration of phosphate aqueous solution is 14.63mol/L, and the free calcium oxide content of converter drum slag is 0%, and specific surface area is
5.289m2/ g, pore volume 0.031mL/g, aperture 25.41nm；
Converter drum slag and phosphate aqueous solution are that mass volume ratio is 50g：0.5mL；By converter drum slag through overground
Powder processing, fineness are more than 200 mesh, are then mixed and react with phosphate aqueous solution, be granulated after reaction, dry, milling is extremely
Fineness is 200 mesh, is stabilization material.
Embodiment 3
With embodiment 2, as different from Example 2, converter drum slag and phosphoric acid are mass volume ratio in the present embodiment
For 50g：1mL.
Embodiment 4
With embodiment 2, as different from Example 2, converter drum slag and phosphoric acid are mass volume ratio in the present embodiment
For 50g：1.5mL.
Embodiment 5
With embodiment 2, as different from Example 2, converter drum slag and phosphoric acid are mass volume ratio in the present embodiment
For 50g：2mL.
Embodiment 6
With embodiment 2, as different from Example 2, after being granulated in the present embodiment, drying milling processing to fineness is
100 mesh.
Experimental example
The stabilization material that above-described embodiment 1 is obtained to embodiment 5, be respectively adopted Autosorb-1 types specific surface area and
Pore size determination instrument carries out the measurement than surface, pore volume, aperture to the converter drum slag after phosphoric acid modification, as a result such as the institute of table 1
Show.
Modified effect of the phosphoric acid solution of 1 different amounts of table to converter drum slag
As it can be seen from table 1 being modified using phosphoric acid to converter drum slag raw material, the ratio of slag can be dramatically increased
Surface area, pore volume and aperture；Modified converter drum slag is the particle for having great pore structure and surface area, is entered
After soil system, pollutant can be entered by loose structure in the gap of modified converter drum slag raw material, reach stable
The purpose of pollutant.
The stabilization material that above-described embodiment 1 is obtained to embodiment 5, is added separately in the soil of heavy metal pollution,
Wherein stabilization material addition is the 15% of heavy metal pollution soil quality, stirs evenly and is repaired, and repair time is
28d.Respectively according to professional standard HJ/T299-2007《Solid waste Leaching leaching method sulfonitric method》To sample into
Row Leaching of Heavy Metals, the measure of Cd, Cu, Pb, Ni, Zn content is carried out using ICP-MS methods, according to standard GB/T 5085.3-
2007《Hazardous waste judging standard-leaching characteristic identification》Whether the setting in standard is up to standard as Leaching of Heavy Metals effect
Foundation；And pH detections are carried out using pHS-25 types laboratory pH meter to the soil after reparation, testing result is as shown in table 2.
Leaching of Heavy Metals concentration after 2 soil remediation of table
From table 2 it can be seen that the stabilization material of the present invention has heavy-metal contaminated soil preferable repairing effect, and
When slag and phosphoric acid quality volume ratio are 33g/mL, the stabilization material obtained is more notable to soil remediation effect, repairs
Heavy metal-polluted soil leaching concentration is far below standard GB/T 5085.3-2007 afterwards《Danger wastes judging standard-Leaching
Differentiate》, fully meet standard GB/T 5085.3-2007《Danger wastes judging standard-leaching characteristic identification》.Meanwhile this
Soil pH value after the stabilization material of invention is repaired is faintly acid, meets the condition of soil comprehensive utilization.
In conclusion a kind of stabilization material for heavy metal soil remediation of the present invention and preparation method thereof, is obtained
Obtain stabilization material has preferable repair to the soil of heavy metal pollution, can significantly reduce heavy metal in soil and contain
Amount.The new way of converter drum steel slag utilization is opened at the same time, and there is preferable economic, society and environmental benefit.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of stabilization material for heavy metal soil remediation, it is characterised in that it is former that the stabilization material includes slag
Material and phosphate aqueous solution, the mass volume ratio of the slag raw material and phosphate aqueous solution are not more than 100g/mL.
2. stabilization material as claimed in claim 1, it is characterised in that the quality volume of the slag raw material and phosphate aqueous solution
Than for 33g/mL~100g/mL.
3. stabilization material as claimed in claim 1, it is characterised in that the concentration of the phosphate aqueous solution for 14mol/L~
15mol/L。
4. stabilization material as claimed in claim 1, it is characterised in that the slag raw material is the slag by milling processing
Powder, the fineness of the steel-making slag powder are more than 200 mesh.
5. stabilization material as claimed in claim 1, it is characterised in that the slag raw material is selected from converter drum slag.
6. stabilization material as claimed in claim 4, it is characterised in that the free calcium oxide content of the converter drum slag is
No more than 0.5%, specific surface area 5.011-5.889m2/ g, pore volume are not more than 0.031mL/g, aperture 20-25.41nm.
7. it is used for the preparation method of the stabilization material of heavy metal soil remediation, its feature as described in claim any one of 1-6
It is, slag raw material and phosphate aqueous solution is mixed and reacted, is granulated after reaction, is dried, milling processing, to obtain the final product
Stabilization material.
8. preparation method as claimed in claim 7, it is characterised in that milling processing to fineness is 100~200 mesh.
9. the stabilization material as described in claim any one of 1-6 for heavy metal soil remediation is administering the dirt of heavy metal soil
Purposes in dye.
10. purposes as claimed in claim 9, it is characterised in that in use, stabilization material is added to heavy metal soil
In, it is mixed evenly, natural curing；The mass ratio of wherein described stabilization material and heavy metal soil for 10%~
20%.
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| CN201711218194.2A CN108003875A (en) | 2017-11-28 | 2017-11-28 | A kind of stabilization material for heavy metal soil remediation and preparation method thereof |
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| CN111422943A (en) * | 2020-04-16 | 2020-07-17 | 昆明理工大学 | Heavy metal immobilization stabilization treatment method |
| CN112300804A (en) * | 2020-11-27 | 2021-02-02 | 中冶宝钢技术服务有限公司 | Heavy metal contaminated soil curing agent and preparation method and application thereof |
| CN112430049A (en) * | 2020-11-18 | 2021-03-02 | 东南大学 | Curing agent for reducing permeability coefficient and effective diffusion coefficient of heavy metal polluted soil as well as preparation method and application of curing agent |
| CN112779017A (en) * | 2020-12-31 | 2021-05-11 | 南京工业大学 | Heavy metal contaminated soil remediation agent and preparation method and application thereof |
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| CN112779017A (en) * | 2020-12-31 | 2021-05-11 | 南京工业大学 | Heavy metal contaminated soil remediation agent and preparation method and application thereof |
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Application publication date: 20180508 |