CN106424120A - Method for stabilizing and remediating chromium-polluted soil through strong reducing agents - Google Patents
Method for stabilizing and remediating chromium-polluted soil through strong reducing agents Download PDFInfo
- Publication number
- CN106424120A CN106424120A CN201611041934.5A CN201611041934A CN106424120A CN 106424120 A CN106424120 A CN 106424120A CN 201611041934 A CN201611041934 A CN 201611041934A CN 106424120 A CN106424120 A CN 106424120A
- Authority
- CN
- China
- Prior art keywords
- soil
- chromium
- stabilizing
- potassium borohydride
- reducing agents
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
The invention discloses a method for stabilizing and remediating chromium-polluted soil through strong reducing agents. Water-soluble hexavalent chromium in the soil can be effectively removed through the method. The method includes the steps of adding potassium borohydride serving as the strong reducing agents into the chromium-polluted soil, uniformly mixing the potassium borohydride and the soil in a mechanical mode, covering the soil with a film after water is sprayed on a surface layer of the soil and carrying out stabilizing treatment for 15-20 days, wherein the stabilizing efficiency can reach 80% or above. The method has the advantages that raw materials are easy to obtain, the process is simple and the stabilizing efficiency is high.
Description
Technical field
The present invention relates to mine tailing repairing and treating technical field, more particularly, to one kind surely change reparation pollution of chromium using strong reductant
The method of soil.
Background technology
China is chromium salt production big country of the world, built up first chromium salt production line from 1958 so far, successively has more than 70 families
Enterprise produced chromic salts, produced substantial amounts of chromium slag in the production process of more than 50 years, and chromium slag about 60 is newly discharged in the whole nation every year now
Ten thousand tons, add up to produce about 6,000,000 tons of the chromium quantity of slag.The pollution of heavy metal-polluted soil has disguise, chronicity and irreversibility
Feature, directly or indirectly causes underground water, air pollution, crops and biology is worked the mischief, or even jeopardizes human health
And life.The factor affecting its effect is sufficiently complex, and the feature of effect varies in different localities.
Contaminated soil remediation method is broadly divided into three classes at present:Physical method, chemical method and biological restoration.Wherein,
Physical method includes physical partition method, solidification stabilization method, Electrodynamic force method, solution elution method, freeze-thaw method；Chemical method includes solvent
Extraction, oxidizing process, reducing process and soil conditioner add；Biological restoration includes microorganism remediation, phytoremediation and animal
Repair.Wherein applying more has solidification and stabilization method, electro reclamation, biological restoration, chemical reduction method and drip washing reparation
Method.
Immobilization and stabilisation are (can also to be aided with certain reduction by being mixed by the soil of pollution of chromium and certain adhesive
Agent, for reduction of hexavalent chromium), so that it is no longer migrated to surrounding environment by the fixing chromium therein of adhesive.The spy of this technology
Point is that soil texture is undisturbed, the operation in suitable area area, if add stabilizer can inexpensively obtain, rehabilitation cost
Very economical.But, the key of the method widespread adoption is how to select to have the stabilization agent more surely changing ability, and becomes
This is cheap, manipulates simple during actual site remediation.
Content of the invention
The technical problem being existed based on background technology, the present invention proposes one kind and surely changes reparation pollution of chromium using strong reductant
The method of soil, it is simple and easy to get to have a raw material, process is simple, the feature of steadyization efficiency high.
A kind of utilization strong reductant proposed by the present invention surely changes the method repairing chromium-polluted soil, comprises the steps：
S1, in the red soil of pollution of chromium add potassium borohydride, make ratio in soil for the potassium borohydride be 5-20%；
S2, so that potassium borohydride is mixed with soil, cover after the top layer spray water of soil one layer thin
Film；
S3, steadyization process time are 15-30 days.
Preferably, in S1, steadyization is repaired from potassium borohydride or other strong reductant.
Preferably, in S1, the ratio of potassium borohydride and soil is 5-20%.
Preferably, in S3, steadyization process time is 15-30 days.
The present invention adopts strong reductant potassium borohydride as stabilization agent, will have more supervirulent Cr VI also in dye soil
Originally it was the trivalent chromium of low toxicity, this invention raw material is simple and easy to get, operating procedure is simple, greatly reduces what pollution of chromium caused to environment
Impact.
Specific embodiment
Below, by specific embodiment, technical scheme is described in detail.
Embodiment 1
1st, add potassium borohydride in the red soil of pollution of chromium, make ratio in soil for the potassium borohydride be 5%；
2nd, potassium borohydride is mechanically made to mix with soil, one layer of covering is thin after the top layer spray water of soil
Film；
3rd, steadyization process time is 25 days.
4th, adopting diphenyl carbazide spectrophotometry to measure the content of 6-valence Cr ions in soil is 16.7%, surely changes repair rate
Reach 83.3%.
Embodiment 2
1st, add potassium borohydride in the red soil of pollution of chromium, make ratio in soil for the potassium borohydride be 10%；
2nd, potassium borohydride is mechanically made to mix with soil, one layer of covering is thin after the top layer spray water of soil
Film；
3rd, steadyization process time is 30 days.
4th, adopting diphenyl carbazide spectrophotometry to measure the content of 6-valence Cr ions in soil is 4.5%, and steadyization repair rate reaches
To 95.5%.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept equivalent or change in addition, all should be included within the scope of the present invention.
Claims (1)
1. a kind of utilization strong reductant surely change repair chromium-polluted soil method it is characterized in that, comprise the steps：
S1, in the red soil of pollution of chromium add potassium borohydride, make ratio in soil for the potassium borohydride be 5-20%；
S2, so that potassium borohydride is mixed with soil, cover after the top layer spray water of soil one layer thin
Film；
S3, steadyization process time are 15-30 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611041934.5A CN106424120A (en) | 2016-11-24 | 2016-11-24 | Method for stabilizing and remediating chromium-polluted soil through strong reducing agents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611041934.5A CN106424120A (en) | 2016-11-24 | 2016-11-24 | Method for stabilizing and remediating chromium-polluted soil through strong reducing agents |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106424120A true CN106424120A (en) | 2017-02-22 |
Family
ID=58219334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611041934.5A Pending CN106424120A (en) | 2016-11-24 | 2016-11-24 | Method for stabilizing and remediating chromium-polluted soil through strong reducing agents |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106424120A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693789A (en) * | 2013-12-09 | 2014-04-02 | 华南师范大学 | Resource recycling method of heavy metals in heavy metal wastewater |
| CN104498045A (en) * | 2014-11-06 | 2015-04-08 | 山东省环境保护科学研究设计院 | Stabilization/solidification restoration reagent applicable to chromium-polluted soil and water-body sediment |
| CN105215051A (en) * | 2015-11-10 | 2016-01-06 | 辽宁石油化工大学 | A kind of reduction-stabilisation two-period form restorative procedure of chromium-polluted soil |
| CN105713615A (en) * | 2016-01-15 | 2016-06-29 | 北京大学 | Hexavalent chromium pollution in-situ repairing agent FeSx, preparation and application |
-
2016
- 2016-11-24 CN CN201611041934.5A patent/CN106424120A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693789A (en) * | 2013-12-09 | 2014-04-02 | 华南师范大学 | Resource recycling method of heavy metals in heavy metal wastewater |
| CN104498045A (en) * | 2014-11-06 | 2015-04-08 | 山东省环境保护科学研究设计院 | Stabilization/solidification restoration reagent applicable to chromium-polluted soil and water-body sediment |
| CN105215051A (en) * | 2015-11-10 | 2016-01-06 | 辽宁石油化工大学 | A kind of reduction-stabilisation two-period form restorative procedure of chromium-polluted soil |
| CN105713615A (en) * | 2016-01-15 | 2016-06-29 | 北京大学 | Hexavalent chromium pollution in-situ repairing agent FeSx, preparation and application |
Non-Patent Citations (1)
| Title |
|---|
| 魏成广等: "《中国钾盐工业概览》", 31 July 2009 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112517626B (en) | Method and device for quickly repairing saline-alkali soil and heavy metal contaminated soil | |
| CN105013810B (en) | A kind of reparation medicament and restorative procedure for chromium-polluted soil | |
| CN101585045B (en) | Method for repairing heavy metal pollution soil by using chemical leaching and deep layer fixing combining technology | |
| CN103894406B (en) | The reparation of wet method detoxifcation associating stabilisation is containing the method for chromium-polluted soil | |
| CN104624632B (en) | Remediation method for hexavalent chromium polluted soil and underground water | |
| CN106424119A (en) | Repair agent used for treating chromium-contaminated soil and use method of repair agent | |
| CN105598146B (en) | Curing agent and restorative procedure for chromium-polluted soil reparation | |
| CN104043645B (en) | A kind of arsenic Polluted Soil restorative procedure | |
| CN110014036A (en) | A kind of method that heat strengthens assisted in situ chemical oxidation renovation of organic pollution soil | |
| Yan et al. | A combined process coupling phytoremediation and in situ flushing for removal of arsenic in contaminated soil | |
| CN103599923A (en) | Method for removing lead in heavy metal polluted soil by utilizing nanometer zero-valent iron and citric acid for combined elution | |
| CN104774619B (en) | It is a kind of for the solidification stabilizer of As polluted soil and its application | |
| CN105880277A (en) | Chromium-contaminated soil remediation method | |
| CN104479686B (en) | A kind of heavy metal curing agent and its curing method | |
| CN103934264A (en) | In-situ reduction restoration method for chromium contaminated soil | |
| CN106745656A (en) | It is a kind of to strengthen the method that iron/peroxy-monosulfate homogeneous system removes organic pollutants | |
| CN110846042A (en) | Chromium slag leaving site composite heavy metal contaminated soil synergistic leacheate and application thereof | |
| CN106424120A (en) | Method for stabilizing and remediating chromium-polluted soil through strong reducing agents | |
| CN104610973B (en) | Repair the eluent and method of chromium-polluted soil | |
| CN103586277A (en) | Method for treating contaminated shallow underground water and soil by utilizing bioremediation agent | |
| CN108284126A (en) | A kind of the purification renovation agent and purification repair process method of contaminated soil | |
| CN105750317A (en) | Restoration method for chromium-polluted soil | |
| CN107262522A (en) | A kind of electrolytic manganese contaminated site soil stabilization repairs medicament and its restorative procedure | |
| CN113025339B (en) | Chemical biological reduction and fixation synergistic remediation agent for chromium-contaminated soil | |
| CN109047324A (en) | Improve the method for phosphor polluted soil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170222 |
|
| RJ01 | Rejection of invention patent application after publication |