CN108723079A - A kind of quick removal technique of organic contaminants in soil - Google Patents

A kind of quick removal technique of organic contaminants in soil Download PDF

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Publication number
CN108723079A
CN108723079A CN201810589323.7A CN201810589323A CN108723079A CN 108723079 A CN108723079 A CN 108723079A CN 201810589323 A CN201810589323 A CN 201810589323A CN 108723079 A CN108723079 A CN 108723079A
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CN
China
Prior art keywords
soil
leacheate
reaction kettle
stirring
catalyst
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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
Application number
CN201810589323.7A
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Chinese (zh)
Inventor
吴晔
张鏖
方超
尚鸣
王莹
王玉萍
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Jiangsu Jinhuan Environmental Protection Equipment Co Ltd
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Jiangsu Jinhuan Environmental Protection Equipment Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jiangsu Jinhuan Environmental Protection Equipment Co Ltd filed Critical Jiangsu Jinhuan Environmental Protection Equipment Co Ltd
Priority to CN201810589323.7A priority Critical patent/CN108723079A/en
Publication of CN108723079A publication Critical patent/CN108723079A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C1/00Reclamation of contaminated soil
    • B09C1/08Reclamation of contaminated soil chemically
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C1/00Reclamation of contaminated soil
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C2101/00In situ

Abstract

The present invention relates to a kind of quick removal techniques of organic contaminants in soil comprising following steps:(1) it pre-processes:It takes by organic pollution contaminated soil, crushes, sieving, remove the particle that diameter is more than 1 centimetre;(2) sample introduction:Pretreated soil is put into reaction kettle of the bottom equipped with agitator arm, then pours into leacheate and catalyst;(3) it removes:Reaction kettle is under sunlight and ultra violet lamp, stirring, catalytic degradation organic matter;(4) it detects:Part leacheate is taken from reaction kettle, whether is removed totally by organic pollution in LC-MS instrument detection architecture;(5) it cleans:After removing leacheate, soil and water are mixed, after stirring, are separated by filtration, filtrate is the mixed system comprising catalyst and leacheate, the soil after being repaired on filter cloth.The present invention synchronizes the enrichment and improvement for realizing organic contaminants in soil, eliminates the lengthy procedure for being first enriched with reprocessing in traditional handicraft, enormously simplifies the treatment process of organic pollution, be obviously improved governance efficiency.

Description

A kind of quick removal technique of organic contaminants in soil
Technical field
The invention belongs to Environmental Chemistry fields, and in particular to a kind of quick removal technique of organic contaminants in soil.
Background technology
The improvement of organic pollution is problem and technical research hot spot that environment in recent years administers field.In related environment The removal of organic pollution, common process have microorganism removal method, plant removal method, elution method, wetland repairing method, urge Change edman degradation Edman, chemistry-microbial association restorative procedure, Microwave method method, high-temperature roasting method, ultrasonic wave repairing method, ultraviolet lighting It penetrates method, oxidation removal method and the above method is cooperateed with to other processes used.In these methods, catalytic degradation method ether Sunlight is the energy, has the advantages of simple and quick, not generate secondary pollution, and further investigation is worth to be inquired into.
For example, application number CN201210492831.6 disclose a kind of combination photocatalysis technology and electrostatic spinning technique to by The method that polycyclic aromatic hydrocarbons contaminated soil is repaired.Specific operating procedure includes with substances such as butyl titanate and bismuth nitrates Spinning solution is prepared, the electrospun fiber membrane with photocatalytic activity is covered in by contaminated soil table to be repaired by electrospinning technology Face drives polycyclic aromatic hydrocarbon to migrate to photocatalysis electrospinning fibre film surface and through light under sunlight exposure by steam transpiration Catalytic degradation.The advantage of the invention is that overcoming photocatalysis technology in soil remediation field obstacle, solar energy is realized It makes full use of, and effective protection soil texture and fertility system, obstructs natural precipitation and polycyclic aromatic hydrocarbon volatilization, limit polycyclic aromatic hydrocarbon " grasshopper jump effect ", play the role of radicallying reform.It is dirty that application number CN200610134208.8 discloses a kind of polycyclic aromatic hydrocarbon Contaminate the ultraviolet nanometer TiO of soil2Catalytic degradation method, by contaminated soil and nano-TiO2Mixture paved in vessel, nanometer TiO2Addition and contaminated soil weight ratio be 0.2%-5%, light application time 2-14 days.
Due to the improvement of organic contaminants in soil, it is related to national economy, although there is more reported in literature, explores New and effective organic pollution treatment process still has social value and key scientific challenges.
Invention content
It is an object of the invention to provide a kind of quick removal of organic contaminants in soil for field of environment pollution control Technique.
Advantage of the present invention is:Remove pollutant speed it is fast, it is efficient, easily operated, do not generate secondary pollution.The present invention Creatively propose a kind of new polycyclic aromatic hydrocarbon pollutant New Process for Treatment.Using removable photo-voltaic power supply as the energy, using purple Outer light promotes, elutes the technique of progress synchronous with removal to realize the rapidly and efficiently removal of organic contaminants in soil, eliminates biography It is first enriched with the lengthy procedure of reprocessing in system technique, is obviously improved governance efficiency and treatment effect.
The present invention provides a kind of quick removal techniques of organic contaminants in soil comprising following steps:
(1) it pre-processes:It takes by organic pollution contaminated soil, crushes, sieving, remove the particle that diameter is more than 1 centimetre;
(2) sample introduction:By pretreated soil be put into bottom equipped with agitator arm reaction kettle in, then pour into leacheate and Catalyst;
(3) it removes:Reaction kettle is under sunlight and ultra violet lamp, stirring, catalytic degradation organic matter;
(4) it detects:Part leacheate is taken from reaction kettle, by organic pollution in LC-MS instrument detection architecture whether Removal is clean;
(5) it cleans:After removing leacheate, soil and water are mixed, after stirring, are separated by filtration, filtrate is to include catalyst With the mixed system of leacheate, the soil after being repaired on filter cloth.
In step (2),
The dosage of the leacheate is 1-2 times, preferably 1.5 times of pretreated soil quality;
The dosage of the catalyst be pretreated soil quality 1-10%, preferably 5%;
The leacheate is grouped as by following group:35~45wt% of lactate, neopelex 1~5wt%, it is remaining Amount is water.
Preferably, the leacheate is grouped as by following group:Lactate 40wt%, neopelex 3wt%, it is remaining Amount is water.
The lactate is one or more in methyl lactate, ethyl lactate, n-butyl lactate etc..
The catalyst is carbon dots modification zinc oxide, and preparation method is:By oxalic acid and zinc acetate in molar ratio 10:1 sets In mortar, it is fully ground to system and clear viscous liquid is presented, then transparency liquid is transferred in crucible, and in 200 DEG C Under the conditions of dry 1h release to no gas;After the fluffy substance of obtained brown is finally calcined 4h under the conditions of 500 DEG C, soon But (cooling means is preferably air-cooled for quickly cooling;Cooling rate is 100 DEG C/min), obtain light-colored powder (i.e. carbon dots modification oxidation Zinc).
In step (3),
Ultraviolet lamp is provided with above the reaction kettle, the power of ultraviolet lamp is preferably 200W, wavelength 280-370nm, purple Minimum range between outer lamp and soil is 15cm;
The time of the catalytic degradation of step (3) is 0.2-5h;
The speed of stirring described in step (3) is 50-200rpm.
In step (5),
The dosage of the water is 2-3 times of soil quality;The mixing time is 10-30min, and the speed of stirring is 50- 200rpm。
In the present invention, the ultraviolet lamp and the required energy of stirring of the reaction kettle are all from moveable photovoltaic Power generation is used as power supply.
Organic contaminants in soil of the present invention can be organic dyestuff rhodamine, phenol etc..
The invention has the advantages that:
1, the quick removal technique of a kind of organic contaminants in soil proposed by the present invention, with moveable photovoltaic Power generation, as the energy, is provided convenience as power supply for field work.
2, the present invention synchronizes the enrichment and improvement for realizing organic contaminants in soil, eliminates in traditional handicraft and is first enriched with The lengthy procedure of reprocessing enormously simplifies the treatment process of organic pollution, is obviously improved governance efficiency.
3, the present invention significantly improves photocatalytic degradation simultaneously using visible light and/or ultraviolet light as the light source of catalyst Effect improves the efficiency of processing contaminated soil.
4, the quick removal technique of a kind of organic contaminants in soil proposed by the present invention, does not generate secondary pollution, very It is suitble to promote the use of.
Description of the drawings
Fig. 1 is the quick removal process flow chart of organic contaminants in soil of the present invention.
Specific implementation mode
Below by specific embodiment, the present invention is further illustrated.
Catalyst in embodiment and comparative example is carbon dots modification zinc oxide, and preparation method is:By oxalic acid and zinc acetate In molar ratio 10:1 is placed in mortar, is fully ground to system and clear viscous liquid is presented, transparency liquid is then transferred to earthenware In crucible, and dry 1h is released to no gas under the conditions of 200 DEG C;Finally by the fluffy substance of obtained brown in 500 DEG C of items It after calcining 4h under part, is quickly cooled down using air-cooled, cooling rate is 100 DEG C/min, obtains light-colored powder (i.e. carbon dots modification oxidation Zinc).
Leacheate described in embodiment and comparative example is grouped as by following group:Ethyl lactate 40wt%, detergent alkylate Sodium sulfonate 3wt%, surplus are water.
Embodiment 1
A kind of quick removal technique of organic contaminants in soil comprising following steps:
(1) it pre-processes:It takes by organic dyestuff rhodamine contaminated soil, crushes, sieving, remove diameter and be more than 1 centimetre Particle;
(2) sample introduction:By pretreated soil be put into bottom equipped with agitator arm reaction kettle in, then pour into leacheate and Catalyst;The dosage of the leacheate is 1.5 times of pretreated soil quality;The dosage of the catalyst is after pre-processing Soil quality 5%;
(3) it removes:Ultraviolet lamp is provided with above the reaction kettle, the power of ultraviolet lamp is 200W, wavelength 280nm, purple Minimum range between outer lamp and soil is 15cm;Reaction kettle stirs 15min, mixing speed under sunlight and ultra violet lamp For 200rpm, catalytic degradation organic matter;
(4) it detects:In whipping process, part leacheate is taken from reaction kettle, after the water in removal system, joined by liquid matter With organic pollution content in instrument detection architecture, completely removed totally after as a result showing stirring 15min;
(5) it cleans:After removing leacheate, soil and water are mixed, after stirring, are separated by filtration, filtrate is to include catalyst With the mixed system of leacheate, the soil after being repaired on filter cloth;The dosage of the water is 2 times of soil quality, stirring speed Degree is 200rpm.
Embodiment 2
A kind of quick removal technique of organic contaminants in soil comprising following steps:
(1) it pre-processes:It takes by organic matter phenol contaminated soil, crushes, sieving, remove the particle that diameter is more than 1 centimetre;
(2) sample introduction:By pretreated soil be put into bottom equipped with agitator arm reaction kettle in, then pour into leacheate and Catalyst;The dosage of the leacheate is 1.5 times of pretreated soil quality;The dosage of the catalyst is after pre-processing Soil quality 5%;
(3) it removes:Ultraviolet lamp is provided with above the reaction kettle, the power of ultraviolet lamp is 200W, wavelength 280nm, purple Minimum range between outer lamp and soil is 15cm;Reaction kettle stirs 2h under sunlight and ultra violet lamp, and mixing speed is 200rpm, catalytic degradation organic matter;
(4) it detects:In whipping process, part leacheate is taken from reaction kettle, after the water in removal system, joined by liquid matter With organic pollution content in instrument detection architecture, completely removed totally after as a result showing stirring 2h;
(5) it cleans:After removing leacheate, soil and water are mixed, after stirring, are separated by filtration, filtrate is to include catalyst With the mixed system of leacheate, the soil after being repaired on filter cloth;The dosage of the water is 2 times of soil quality, stirring speed Degree is 200rpm.
Embodiment 3
A kind of quick removal technique of organic contaminants in soil comprising following steps:
(1) it pre-processes:It takes by polycyclic aromatic hydrocarbons contaminated soil, crushes, sieving, remove the particle that diameter is more than 1 centimetre;
(2) sample introduction:By pretreated soil be put into bottom equipped with agitator arm reaction kettle in, then pour into leacheate and Catalyst;The dosage of the leacheate is 1.5 times of pretreated soil quality;The dosage of the catalyst is after pre-processing Soil quality 5%;
(3) it removes:Ultraviolet lamp is provided with above the reaction kettle, the power of ultraviolet lamp is 200W, wavelength 280nm, purple Minimum range between outer lamp and soil is 15cm;Reaction kettle stirs 4h under sunlight and ultra violet lamp, and mixing speed is 200rpm, catalytic degradation organic matter;
(4) it detects:In whipping process, part leacheate is taken from reaction kettle, by having in LC-MS instrument detection architecture Machine pollutant load has completely removed totally after as a result showing stirring 4h;
(5) it cleans:After removing leacheate, soil and water are mixed, after stirring, are separated by filtration, filtrate is to include catalyst With the mixed system of leacheate, the soil after being repaired on filter cloth;The dosage of the water is 2 times of soil quality, stirring speed Degree is 200rpm.
Comparative example 1
A kind of quick removal technique of organic contaminants in soil comprising following steps:
(1) it pre-processes:It takes by organic dyestuff rhodamine contaminated soil (with the pedotheque in embodiment 1), crushes, sieve Filter removes the particle that diameter is more than 1 centimetre;
(2) sample introduction:By pretreated soil be put into bottom equipped with agitator arm reaction kettle in, then pour into catalyst and Leacheate;The dosage of the leacheate is 1.5 times of pretreated soil quality;The dosage of the catalyst is after pre-processing Soil quality 5%;
(3) it removes:Reaction kettle stirs 45min, mixing speed 200rpm, catalytic degradation organic matter under sunlight;
(4) it detects:In whipping process, part leacheate is taken from reaction kettle, by having in LC-MS instrument detection architecture Machine pollutant load has completely removed totally after as a result showing stirring 45min;
(5) it cleans:After removing leacheate, soil and water are mixed, after stirring, are separated by filtration, filtrate is to include catalyst With the mixed system of leacheate, the soil after being repaired on filter cloth;The dosage of the water is 2 times of soil quality, stirring speed Degree is 200rpm.
Compared with Example 1 compared with comparative example 2 does not use ultra violet lamp, only relies on sunlight, homogeneous in other conditions With in the case of, need 45min that could completely remove rhodamine, the removal efficiency of embodiment 1 is three times of comparative example 1.
Comparative example 2
A kind of quick removal technique of organic contaminants in soil comprising following steps:
(1) it pre-processes:It takes by phenol contaminated soil (with the pedotheque in embodiment 3), crushes, sieving, remove straight Diameter is more than 1 centimetre of particle;
(2) sample introduction:Pretreated soil is put into reaction kettle of the bottom equipped with agitator arm, then pours into water and catalysis Agent;The dosage of the water is 1.5 times of pretreated soil quality;The dosage of the catalyst is pretreated soil matter The 5% of amount;
(3) it removes:Ultraviolet lamp is provided with above the reaction kettle, the power of ultraviolet lamp is 200W, wavelength 280nm, purple Minimum range between outer lamp and soil is 15cm;Reaction kettle is under sunlight and ultra violet lamp, and for 24 hours, mixing speed is for stirring 200rpm, catalytic degradation organic matter;
(4) it detects:In whipping process, partially liq is taken from reaction kettle, by organic in LC-MS instrument detection architecture Pollutant load, being as a result shown in stirring, organic pollution only eliminates 30% (compared with stirring 0h) for 24 hours.
Compared with Example 3 compared with comparative example 2 does not add leacheate, catalyst and water is only added, in other conditions all same In the case of, for 24 hours, the removal rate of phenol, which only has, stirs initial 30% for stirring.
Comparative example 3
A kind of quick removal technique of organic contaminants in soil comprising following steps:
(1) it pre-processes:It takes by phenol contaminated soil (with the pedotheque in embodiment 3), crushes, sieving, remove straight Diameter is more than 1 centimetre of particle;
(2) sample introduction:Pretreated soil is put into reaction kettle of the bottom equipped with agitator arm, then pours into leacheate; The dosage of the leacheate is 1.5 times of pretreated soil quality;
(3) it removes:Ultraviolet lamp is provided with above the reaction kettle, the power of ultraviolet lamp is 200W, wavelength 280nm, purple Minimum range between outer lamp and soil is 15cm;Reaction kettle is under sunlight and ultra violet lamp, and for 24 hours, mixing speed is for stirring 200rpm, catalytic degradation organic matter;
(4) it detects:In whipping process, part leacheate is taken from reaction kettle, by having in LC-MS instrument detection architecture As a result machine pollutant load shows that the concentration of organic matter after stirring for 24 hours has almost no change.
Compared with Example 3 compared with comparative example 3 does not add catalyst, only adds leacheate, in the feelings of other conditions all same Under condition, for 24 hours, the concentration of organic matter has almost no change for stirring.
Comparative example 4
A kind of quick removal technique of organic contaminants in soil comprising following steps:
(1) it pre-processes:It takes by phenol contaminated soil (with the pedotheque in embodiment 3), crushes, sieving, remove straight Diameter is more than 1 centimetre of particle;
(2) sample introduction:By pretreated soil be put into bottom equipped with agitator arm reaction kettle in, then pour into catalyst and The ethyl lactate aqueous solution of mass fraction 40%;The dosage of the ethyl lactate aqueous solution is pretreated soil quality 1.5 again;The dosage of the catalyst is the 5% of pretreated soil quality;
(3) it removes:Ultraviolet lamp is provided with above the reaction kettle, the power of ultraviolet lamp is 200W, wavelength 280nm, purple Minimum range between outer lamp and soil is 15cm;Reaction kettle is under sunlight and ultra violet lamp, and for 24 hours, mixing speed is for stirring 200rpm, catalytic degradation organic matter;
(4) it detects:In whipping process, partially liq is taken from reaction kettle, by organic in LC-MS instrument detection architecture Pollutant load only eliminates 46% (compared with stirring 0h) after as a result showing stirring for 24 hours.
Compared with Example 3 compared in the ethyl lactate aqueous solution alternative embodiment 3 of the mass fraction 40% of comparative example 5 Leacheate, in the case of other conditions all same, for 24 hours, the removal rate of phenol, which only has, stirs initial 46% for stirring.

Claims (8)

1. a kind of quick removal technique of organic contaminants in soil, which is characterized in that include the following steps:
(1) it pre-processes:It takes by organic pollution contaminated soil, crushes, sieving, remove the particle that diameter is more than 1 centimetre;
(2) sample introduction:Pretreated soil is put into reaction kettle of the bottom equipped with agitator arm, then pours into leacheate and catalysis Agent;
(3) it removes:Reaction kettle is under sunlight and ultra violet lamp, stirring, catalytic degradation organic matter;
(4) it detects:Part leacheate is taken from reaction kettle, whether is removed by organic pollution in LC-MS instrument detection architecture Totally;
(5) it cleans:After removing leacheate, soil and water are mixed, after stirring, are separated by filtration, filtrate is to include catalyst and leaching The mixed system of washing lotion, the soil after being repaired on filter cloth.
2. minimizing technology according to claim 1, it is characterised in that:In step (2), the dosage of the leacheate is pre- place 1-2 times of soil quality after reason;The dosage of the catalyst is the 1-10% of pretreated soil quality.
3. minimizing technology according to claim 1, it is characterised in that:The leacheate is grouped as by following group:Lactate 35~45wt%, 1~5wt% of neopelex, surplus are water.
4. minimizing technology according to claim 1, it is characterised in that:The leacheate is grouped as by following group:Lactate 40wt%, neopelex 3wt%, surplus are water.
5. minimizing technology according to claim 3 or 4, it is characterised in that:The lactate is methyl lactate, lactic acid second It is one or more in ester, n-butyl lactate etc..
6. the catalyst is carbon dots modification zinc oxide, preparation method is:By oxalic acid and zinc acetate in molar ratio 10:1 is placed in In mortar, it is fully ground to system and clear viscous liquid is presented, then transparency liquid is transferred in crucible, and in 200 DEG C of items Dry 1h is released to no gas under part;After the fluffy substance of obtained brown is finally calcined 4h under the conditions of 500 DEG C, quickly It is cooling, obtain light-colored powder.
7. minimizing technology according to claim 1, it is characterised in that:In step (3), purple is provided with above the reaction kettle The power of outer lamp, ultraviolet lamp is 200W, wavelength 280-370nm, and the minimum range between ultraviolet lamp and soil is 15cm.
8. minimizing technology according to claim 1, it is characterised in that:The time of the catalytic degradation of step (3) is 0.2-5h; The speed of the stirring is 50-200rpm.
CN201810589323.7A 2018-06-08 2018-06-08 A kind of quick removal technique of organic contaminants in soil Pending CN108723079A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004097913A (en) * 2002-09-06 2004-04-02 Fudo Constr Co Ltd Treatment system for polluted soil
CN101224467A (en) * 2008-01-04 2008-07-23 南京大学 Leaching agent for repairing polycyclic aromatic hydrocarbon-cuprum compound polluted soil and method thereof
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
CN103691733A (en) * 2013-12-11 2014-04-02 浙江大学 Extracting, leaching and repairing integrated device and method for polluted soil
CN104971939A (en) * 2015-07-30 2015-10-14 浙江爱科乐环保有限公司 Remediation system and method for land polluted by chloro nitrotoluene
CN107376940A (en) * 2017-07-31 2017-11-24 江苏金环环保设备有限公司 A kind of catalytic composite material of rapidly and efficiently renovation of organic pollution soil and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004097913A (en) * 2002-09-06 2004-04-02 Fudo Constr Co Ltd Treatment system for polluted soil
CN101224467A (en) * 2008-01-04 2008-07-23 南京大学 Leaching agent for repairing polycyclic aromatic hydrocarbon-cuprum compound polluted soil and method thereof
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
CN103691733A (en) * 2013-12-11 2014-04-02 浙江大学 Extracting, leaching and repairing integrated device and method for polluted soil
CN104971939A (en) * 2015-07-30 2015-10-14 浙江爱科乐环保有限公司 Remediation system and method for land polluted by chloro nitrotoluene
CN107376940A (en) * 2017-07-31 2017-11-24 江苏金环环保设备有限公司 A kind of catalytic composite material of rapidly and efficiently renovation of organic pollution soil and preparation method thereof

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Application publication date: 20181102