CN106734165A - A kind of method of BHC in citric acid auxiliary potassium ferrate degraded soil - Google Patents
A kind of method of BHC in citric acid auxiliary potassium ferrate degraded soil Download PDFInfo
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- CN106734165A CN106734165A CN201611201575.5A CN201611201575A CN106734165A CN 106734165 A CN106734165 A CN 106734165A CN 201611201575 A CN201611201575 A CN 201611201575A CN 106734165 A CN106734165 A CN 106734165A
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- soil
- bhc
- citric acid
- potassium ferrate
- mixed solution
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- 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
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to organic polluted soil recovery technique field, disclose a kind of citric acid auxiliary potassium ferrate and repair BHC contaminated site method.The method is mixed into mud state soil mixed solution by by BHC contaminated soil according to certain soil ratio, regulation pH value, a certain proportion of citric acid and potassium ferrate are added, 6~24h is vibrated under normal temperature in constant temperature oscillator, the degraded hexachloro cyclohexane rate after treatment reaches more than 60%.The present invention has advantages below：Process conditions are simple, operation requires that low and treatment effeciency is high etc., it is adaptable to soil polluted by organic chloride reparation.
Description
Technical field
The invention belongs to contaminated site recovery technique field, and in particular to one kind is using citric acid auxiliary potassium ferrate degraded
The method of soil BHC.
Background research
BHC scientific name hexachlorocyclohexanes, is a kind of organo-chlorine pesticide, due to its strong toxicity, difficult degradation, high residue and easily
Enrichment etc. characteristic and be put into《Convention of Stockholm》In 12 kinds disabling persistent organisms.With China's modernization and city
The development in city, substantial amounts of factory and enterprise is closed, the existing 50 years organo-chlorine pesticide production history of China, therefore exists big
The contaminated site of amount urgently repair process, wherein with BHC, DDT and hexachloro-benzene be difficult degradation major pollutants.Current pin
The restorative procedure of the organochlorine pesticide pollution soil such as BHC is included rotary kiln coexistence put, thermal desorption, biodegradation and chemistry
Drip washing etc..Wherein rotary kiln coexistence is put and thermal desorption high cost and is also easy to produce secondary pollution, and biodegradation period is long, wherein chemistry
Oxidizing process obtained in wastewater treatment and soil remediation because its degraded to organic contamination is more rapid extensive research and
Using.
In field of environmental technology, conventional chemical oxidizing agent have Fenton reagent, ozone, potassium permanganate, persulfate and
Potassium ferrate etc..Fe (VI) wherein in potassium ferrate, with very strong oxidisability, it decomposes the Fe (III) for producing easily with hydrogen
Colloid of iron oxide is suspended in water, continues the adsorbent of abundant water pollutant, flocculant, it is seen that it be a kind of collection oxidation, absorption,
The new and effective multifunctional water treating agent being condensated as a whole is flocculated and helps, the organic pollution that can effectively go in water removal, and do not produce
Raw secondary pollution, therefore start to be paid close attention in water process and utilize.But potassium ferrate is as oxidant in soil remediation
In be also little affected by concern, main cause be probably because ferrate it is unstable, easily decompose produce Fe (III) in soil sink
Shallow lake is got off, and the low mass transfer and complexity in soil make the repairing effect of ferrate be subject to a definite limitation in addition.Using chelating
Agent such as citric acid complex potassium ferrate decomposes the Fe (III) for producing, and can make the catabolite of potassium ferrate and still have preferably oxidation
Property, the BHC in coordinating Fe (VI) to continue degraded soil can greatly improve degradation effect.
Present invention applicant discloses a kind of using chelating agent auxiliary potassium ferrate degraded soil on the basis of studying for many years
The method of BHC in earth, realizes the efficient quick reparation of BHC contaminated soil.
The content of the invention
The invention provides the new method of BHC in a kind of utilization chelating agent auxiliary potassium ferrate oxidative degradation soil, fit
For the reparation of BHC contaminated site, while can also be applied to the reparation of the similar organo-chlorine pesticide such as DDT, hexachloro-benzene.
Concrete scheme of the present invention is as follows：BHC contaminated soil and water are stirred and evenly mixed, the mixing of mud state soil is made molten
Liquid, adjusts liquid-solid ratio and pH value, and to a certain amount of citric acid and potassium ferrate is added in mud, normal temperature vibrates 6~24h, soil
The degradation rate of middle BHC is up to more than 60%.
BHC content is 5~50mg/kg in described soil.
Described citric acid and the dosage of potassium ferrate are 10~500 times of BHC molal quantity in soil.
Described soil ratio is 2:1~5:1.
Described pH value range is 2~5, is adjusted with hydrochloric acid and NaOH.
Described constant temperature oscillation rotating speed is 180r/min.
Potassium ferrate in the present invention is used to aoxidize the BHC in mud state soil, and it has strong oxygen in acid condition
The property changed, but easily decompose and produce Fe (III), the effect of citric acid is during complexing Fe (III) makes it remain dissolved in the soil liquid, to continue
BHC in degraded soil.
The present invention is mainly very strong come stabilization of oxidizing using citric acid but hold labile high ferro compared with other technologies
Sour potassium, so as to ensure the thorough degraded of potassium ferrate and its catabolite to soil BHC.
Specific implementation
Below in conjunction with example, the present invention is further described, but embodiment of the present invention not limited to this.
Example 1 and example 2 are repaired using the present invention to BHC contaminated soil.Wherein remain in six or six in soil
Six are extracted using ultrasonic method, use Shimadzu gas chromatograph quantitative determination.
Example 1：
10g α-BHC content is prepared for the contaminated soil of 50mg/kg is placed in 250ml conical flasks, is added in soil
50mL water, is made mud state soil mixed solution.PH of mixed is adjusted to 3 using hydrochloric acid and NaOH, to mud soil
165mg citric acids and 170mg potassium ferrates are added in mixed liquor.Constant temperature oscillation case vibration 24h will be put under reaction system normal temperature,
With the speed oscillation of 180r/min.After reaction terminates, to adding isopropanol in reaction system, and by ultrasonic extraction soil
α-BHC, quantitative determination is carried out using gas chromatography to the α-BHC in extract solution.Result shows, α-six six in soil
Six degradation rate is 61%.
Example 2：
10g β-BHC content is prepared for 40mg/kg contaminated soils are placed in 250ml conical flasks, is added in soil
40mL water, is made mud state soil mixed solution.PH of mixed is adjusted to 4 using hydrochloric acid and NaOH, to mud soil
132mg citric acids and 136mg potassium ferrates are added in mixed liquor.Constant temperature oscillation case vibration 20h will be put under reaction system normal temperature,
With the speed oscillation of 180r/min.After reaction terminates, it is quenched with isopropanol and is reacted, and the β-BHC in ultrasonic extraction soil,
Using gas-chromatography to the β in extract solution-BHC quantitative determination.Result shows that the degradation rate of BHC is 63% in soil.
Claims (7)
1. a kind of method that citric acid aids in BHC in potassium ferrate degraded soil, its feature is comprised the following steps：Six or six
Six contaminated soils are made mud state soil mixed solution, adjust the liquid-solid ratio and pH value of soil mixed solution, add certain proportion
Citric acid and potassium ferrate, 6~24h is vibrated under normal temperature in constant temperature oscillator, the degradation rate of the BHC after treatment reaches
More than 60%.
2. method according to claim 1, it is characterised in that the content of BHC is 5~50mg/kg in the soil.
3. method according to claim 1, it is characterised in that the liquid-solid ratio of the soil mixed solution is 2:1~10:1.
4. method according to claim 1, it is characterised in that the pH value of the soil mixed solution is 2~5.
5. method according to claim 1, it is characterised in that the citric acid dosage for soil quality 0.5~
2%.
6. method according to claim 1, it is characterised in that the potassium ferrate dosage for soil quality 0.5~
5%.
7. method according to claim 1, it is characterised in that the rotating speed of the constant temperature oscillator is 180r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611201575.5A CN106734165A (en) | 2016-12-22 | 2016-12-22 | A kind of method of BHC in citric acid auxiliary potassium ferrate degraded soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611201575.5A CN106734165A (en) | 2016-12-22 | 2016-12-22 | A kind of method of BHC in citric acid auxiliary potassium ferrate degraded soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106734165A true CN106734165A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611201575.5A Pending CN106734165A (en) | 2016-12-22 | 2016-12-22 | A kind of method of BHC in citric acid auxiliary potassium ferrate degraded soil |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101293254A (en) * | 2008-05-27 | 2008-10-29 | 南京大学 | Method for eluting and renovating soil with heavy metal-organic matter combined pollution |
| CN101648207A (en) * | 2009-08-28 | 2010-02-17 | 中国科学院地理科学与资源研究所 | Chemical oxidation remediation method for organism-contaminated soil and remediation device |
| CN103752598A (en) * | 2013-12-25 | 2014-04-30 | 天津生态城环保有限公司 | Equipment and method for restoring heavy-metal-polluted soil by combination of leaching method and oxidation method |
| CN104511476A (en) * | 2013-10-08 | 2015-04-15 | 南京农业大学 | Method for increasing speed of oxidative degradation of organic pollutant in soil |
| CN104607456A (en) * | 2014-12-19 | 2015-05-13 | 中国环境科学研究院 | A remediation method for soil polluted by chlorobenzenes |
| CN104630113A (en) * | 2015-02-10 | 2015-05-20 | 鄂志东 | Bacillus amyloliquefaciens capable of degrading organophosphorus pesticide and application of bacillus amyloliquefaciens in degrading organophosphorus pesticide |
| CN105567249A (en) * | 2016-02-29 | 2016-05-11 | 山西民基生态环境工程股份有限公司 | Chemical repairing agent for farmland soil Cd pollution |
-
2016
- 2016-12-22 CN CN201611201575.5A patent/CN106734165A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101293254A (en) * | 2008-05-27 | 2008-10-29 | 南京大学 | Method for eluting and renovating soil with heavy metal-organic matter combined pollution |
| CN101648207A (en) * | 2009-08-28 | 2010-02-17 | 中国科学院地理科学与资源研究所 | Chemical oxidation remediation method for organism-contaminated soil and remediation device |
| CN104511476A (en) * | 2013-10-08 | 2015-04-15 | 南京农业大学 | Method for increasing speed of oxidative degradation of organic pollutant in soil |
| CN103752598A (en) * | 2013-12-25 | 2014-04-30 | 天津生态城环保有限公司 | Equipment and method for restoring heavy-metal-polluted soil by combination of leaching method and oxidation method |
| CN104607456A (en) * | 2014-12-19 | 2015-05-13 | 中国环境科学研究院 | A remediation method for soil polluted by chlorobenzenes |
| CN104630113A (en) * | 2015-02-10 | 2015-05-20 | 鄂志东 | Bacillus amyloliquefaciens capable of degrading organophosphorus pesticide and application of bacillus amyloliquefaciens in degrading organophosphorus pesticide |
| CN105567249A (en) * | 2016-02-29 | 2016-05-11 | 山西民基生态环境工程股份有限公司 | Chemical repairing agent for farmland soil Cd pollution |
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Application publication date: 20170531 |
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