CN107030101A - A kind of method of utilization microbial association EK PRB restoration of soil polluted by heavy metal - Google Patents
A kind of method of utilization microbial association EK PRB restoration of soil polluted by heavy metal Download PDFInfo
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- CN107030101A CN107030101A CN201710189722.XA CN201710189722A CN107030101A CN 107030101 A CN107030101 A CN 107030101A CN 201710189722 A CN201710189722 A CN 201710189722A CN 107030101 A CN107030101 A CN 107030101A
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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
- B09C1/085—Reclamation of contaminated soil chemically electrochemically, e.g. by electrokinetics
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of method of utilization microbial association EK PRB restoration of soil polluted by heavy metal, repaired with electronic (EK) prosthetic device heavy metal contaminated soil, electro reclamation device is by reactive tank, two electrodes, two permeable reactive barriers (PRB) and dc source composition, dismountable permeable reactive barrier is set respectively before two electrodes, there is placement heavy-metal composite pollution soil between permeable reactive barrier, humus and microbial reaction groove, apply voltage in two electrodes, after energization, in soil cadmium under electrodynamic action to cathodic migration, adsorbed and fix by the permeable reactive barrier before negative electrode, chromium is migrated under electrodynamic action to anode in soil, adsorbed and fix to the permeable reactive barrier before anode by chromium；The permeable reactive barrier of the fixed heavy metal ion of absorption is removed, heavy-metal ion removal contaminated soil is obtained.This method is simple to operate, with low cost, conveniently, and heavy metal contaminated soil can be repaired on the spot, and remediation efficiency is high, and new pollution is not produced in repair process.
Description
Technical field
Electronic (Electrokinetic, the EK)-permeable reactive barrier of microbial association is utilized the present invention relates to one kind
（Permeable Reactive Barrier, PRB）The method of restoration of soil polluted by heavy metal, belongs to environmental protection technology neck
Domain.
Technical background
During the improvement of Chinese Urbanization and city habitat environment, because of industrial structure upgrading, city layout adjustment and dirt
Dye, which disturbs residents, to be waited enterprises remove and is retained in the soil of the industrial pollution of urban area, has seriously threatened surrounding enviroment and resident to be good for
Health.The heavy polluted industry of especially developed regions leaves industrial soil, the common Compound Heavy Metals thing in soil, for example
Cadmium, chromium, nickel, lead and other elements, the stabilization of the entail dangers to ecosystem especially have serious threaten and other biological to health
Existence, therefore, the reparation of contaminated soil is extremely urgent.
At present, the external contaminated soil remediation method taken is more, still, all there is certain limitation because of its drawback
Property.In showering, it is necessary to contaminated soil carry and be transported to it is other it is local handled, it is general to expend higher, and
Various methods are all limited by land resource and pollutant emission:In repairing in the original location, heavy metal contaminants are solidified, covered
Bury easily cause secondary pollution, contaminated soil remediation cycle it is long；
In recent years, heavy metal electric repair method have efficiently, it is quick, be suitable for cohesive soil, and environment will not be produced
The advantages of big disturbance, receive extensive concern.Although electric driving method is usually used in heavy metal in in-situ immobilization soil and water-soluble
The preferable organic matter of property.But it is due to that various influence factor comprehensive functions cause traditional electric driving method remediation efficiency poor, therefore, how
The remediation efficiency for improving electric driving method is the study hotspot of current soil electro reclamation.The electric repairing technique of heavy metal is a kind of master
Dynamic recovery technique, its general principle is that the biology of pollutant in the various electrokinesises enhancing underground environment produced using electric field can
Usability, the activity of microorganism directly mineralising organic matter.Because the technology has the features such as rehabilitation cost is low, removal efficiency is high,
Receive the extensive concern of domestic and international soil remediation expert.
The content of the invention
For defect of the prior art, it is an object of the invention to propose that one kind is repaired using microbial association EK-PRB
The method of heavy-metal contaminated soil, this method is simple to operate, with low cost, conveniently, and heavy metal contaminated soil can be carried out on the spot
Repair, remediation efficiency is high, new pollution is not produced in repair process.
To reach above-mentioned purpose, the present invention uses following technical proposals：
A kind of method of utilization microbial association EK-PRB restoration of soil polluted by heavy metal, it is characterised in that：Using electronic (EK)
Prosthetic device heavy metal contaminated soil is repaired, described electro reclamation device by reactive tank, two electrodes, two can
Dismountable permeable reactive barrier (PRB) is respectively arranged with before permeable reactive wall (PRB) and dc source composition, two electrodes,
Have between two permeable reactive barriers (PRB) for placing heavy-metal composite pollution soil, humus and the reaction of microorganism
Groove, makes two electrodes be separated by it, applies constant current stable DC voltage respectively at two electrodes, makes mixture institute in reactive tank
After being 1 V/cm, energization 4-8 days by voltage gradient, removal permeable reactive barrier (PRB), heavy metal ion is removed from soil,
It is comprised the following steps that：
(1) chooses a certain amount of heavy-metal contaminated soil and humus, according to heavy-metal contaminated soil and humus mass ratio
(g：G) it is 10:1 ratio is well mixed, and is added into deionized water, and the mixture-metal Polluted Soil that moisture content is 30% is made
Earth is standby；
(2) choose a certain amount of microorganism fungus kind bacillus coagulans (Bacillus coagulans) or chromium reducing bacteria
(Microbacterium), bacillus coagulans and chromium reducing bacteria are seeded in LB liquid medium, the composition of the culture medium
For the g L of sodium chloride 5-1, the g L of yeast extract 5-1, the g L of tryptone 10-1, pH 7.0 is 30 DEG C in temperature, with rotating speed
For the 160 rpm h of oscillator shaken cultivation 24, bacterium solution is obtained standby；
(3) by bacterium solution obtained by the mixture-metal contaminated soil obtained by step (1) and step (2) according to mass volume ratio (g：
ML it is) 10:1 ratio mixing, is put into electrolytic cell after mixing and carries out activation culture 1-2 days, and after activation, a pole anode is connected
Positive source, a pole negative electrode is switched on power negative pole, is connected direct current heavy metal contaminated soil and is repaired, in voltage gradient
For energization under the conditions of 1 V/cm 3-8 days, the soil of heavy metal pollution removing is obtained；
(4) energizations remove soil and permeable reactive barrier (PRB) after terminating, and then obtain the soil for removing removing heavy metals.
Preferably, the microorganism be bacillus coagulans (Bacillus coagulans), chromium reducing bacteria
(Microbacterium) in one kind or two kinds.
Preferably, the humus is one kind in natural fertile soil, humic acid or two kinds.
Preferably, the permeable reactive barrier (PRB) is built-in with the ecological sorbing material of filling, and ecological sorbing material is to adopt
With 300 DEG C modified natural attapulgite obtained by 5 h is calcined in Muffle furnace high temperature.
The general principle of the present invention is to utilize to be, first, the lactic acid produced using microorganism bacillus coagulans will can be inhaled
It is attached be fixed on soil micelle be difficult to be dissolved out with the heavy metal of aqueous medium dissolution from sour environment；Secondly, chromium is utilized
Redox occurs for reducing bacteria and the Cr (VI) for having excessive risk, high carcinogenic, makes the reduction of heavy metal chromium valence state, is reduced to people
Body health threat is smaller, the relatively low Cr of risk (III), serves the effect of chromium and rapid detoxification in activating soil；Utilize humic
Nutrient needed for not only containing a large amount of microbial growths in matter can support life and the activity of microorganism, improve it
The toxic action of pollutant and electric current is resisted, and wherein also contains a large amount of electron shuttle bodies, is occurred in microorganism and heavy metal
There is provided a large amount of electronics for effect.Heavy metal ion by the activation of microorganism energy under the electrodynamic actions such as electromigration, electrodialysis
Soil that wear hyposmosis, densification is oriented migration, is moved to the two poles of the earth and the ecological adsorption material in permeable reactive barrier (PRB)
Material reacted, be fixed on wherein, eventually through remove permeable reactive barrier (PRB), with reach heavy metal ion thoroughly from
Removed in soil.
The present invention compared with prior art, speciality and remarkable advantage is protruded with following：
1. the microorganism used in this method is conventional microbiological, easily obtain；
2. this method is activated using microorganism heavy metal, secondary pollution will not be caused to soil；Have to soil remediation
Sustainability, long-term effect；
3. this method is acted synergistically using humus, heavy metal pollution place is generally industrial land, and soil is more barren, and
Plot is used for building greenery patches after repairing and treating, and addition humus can not only aid in microbial association electro reclamation, and
And soil is improved, to being conducive to planting plants；
4. this method is by removing permeable reactive barrier (PRB), heavy metal ion can thoroughly be removed from soil；
5. this method is simple to operate, with low cost, conveniently, easily carry out and repair on the spot, can reach efficient, quick soil, repair place
The cost of reason is low, and heavy metal remediation efficiency is high.
Embodiment
The present invention is described in further detail below in conjunction with specific implementation example.
Embodiment 1
A kind of method of utilization microbial association EK-PRB restoration of soil polluted by heavy metal, using electronic (EK) prosthetic device counterweight
The soil of metallic pollution is repaired, and described electro reclamation device is by reactive tank, two electrodes, two permeable reactive barriers
(Permeable Reactive Barrier, PRB) and dc source are constituted, and are respectively arranged with before two electrodes dismountable
Permeable reactive barrier, has between two permeable reactive barriers for placing heavy-metal composite pollution soil, humus and making anti-
It is 1 V/cm to answer in groove voltage gradient suffered by mixture, after energization 4-8 days；Permeable reactive barrier is removed, heavy metal ion is from soil
Removed in earth, it is comprised the following steps that：
(1) weigh it is a certain amount of be derived from Shanghai University's Golconda school district East experimental field topsoil, its thickness is 0-20cm, natural
It is put into mortar and is crushed after air-drying, then 2 mm nylon mesh of mistake, it is standby to obtain soil powder, weighs a certain amount of K2Cr2O7、
CdCl2Dissolved with ultra-pure water, be then placed in volumetric flask and be settled to 2.00 L, gained soil, makes it before being then poured into
It is sufficiently mixed, configuration pollution concentration is respectively 500 mg/kg Cr（VI）The Cd target soils of target soil, 100 mg/kg, so
60 days soil agings are carried out afterwards；Heavy-metal contaminated soil and humus are chosen, according to heavy-metal contaminated soil and humus quality
Than (g：G) it is 10:1 ratio is well mixed, and is added into deionized water, and moisture content is made and is polluted for 30% mixture-metal
Soil is standby；Reactive tank is placed on, two electrodes is separated by it.
(2) choose a certain amount of microorganism fungus kind choose a certain amount of bacillus coagulans (Bacillus coagulans) or chromium reducing bacteria (Microbacterium), bacillus coagulans or chromium reducing bacteria are seeded to LB liquid medium
In, the composition of the culture medium is the g L of sodium chloride 5-1, the g L of yeast extract 5-1, the g L of tryptone 10-1, pH 7.0,
Temperature is 30 DEG C, and the h of oscillator shaken cultivation 24 by 160 rpm of rotating speed obtains bacterium solution standby；
(3) by bacterium solution obtained by the mixture-metal contaminated soil obtained by step (1) and step (2) according to mass volume ratio (g：
ML it is) 10:1 ratio mixing, is put into electrolytic cell after mixing and carries out activation culture 1-2 days, and after activation, a pole anode is connected
Positive source, a pole negative electrode is switched on power negative pole, is connected stable DC voltage heavy metal contaminated soil and is repaired, in electricity
Press gradient be in energization 3-8 days under the conditions of 1 V/cm, soil cadmium under electrodynamic action to cathodic migration, by before negative electrode can
Permeable reactive wall (PRB) absorption is fixed, and chromium is migrated under electrodynamic action to anode in soil, by chromium to permeable before anode
Reaction wall (PRB) absorption is fixed；
(4) energizations remove the permeable reactive barrier (PRB) of the fixed heavy metal ion of absorption after terminating, and then obtain removing with much money
Belong to the soil of ionic soil.
The soil effect of heavy metal pollution removing is gone made from verification experimental verification embodiment 1, is repaiied with chemical analyzer to above-mentioned
Soil after multiple is tested, and measures after reparation that hexavalent chromium concentration is 8.6 mg/kg in soil, and clearance is 98.3 %；Total chromium
Concentration is 132.4mg/kg, and clearance is 73.5%；Cadmium concentration is 39.8mg/kg, and clearance is 60.2%；Reach good weight
Metal removal effect.
The present embodiment of embodiment 2 is tested using natural pollution soil：
The present embodiment 2 is substantially the same manner as Example 1, is particular in that：
The contaminated topsoil in place is left in the Shanghai industry that is selected from the present embodiment 2 described in step (1), after reparation
Obtain the soil of heavy metal pollution removing.
The soil after above-mentioned reparation is tested with chemical analyzer, it is 29.6 mg/ to measure hexavalent chromium concentration in soil
Kg, clearance is 94.6%；Total chromium concn is 217.9mg/kg, and clearance is 65.3%；Cadmium concentration is 8.9 mg/kg, is removed
Rate is 68.7%, reaches good heavy metals removal effect.
Claims (4)
1. a kind of method of utilization microbial association EK-PRB restoration of soil polluted by heavy metal, it is characterised in that：Using electronic
(EK) prosthetic device heavy metal contaminated soil is repaired, described electro reclamation device by reactive tank, two electrodes,
Dismountable permeable reaction is respectively arranged with before two permeable reactive barriers (PRB) and dc source composition, two electrodes
Wall, has between two permeable reactive barriers for placing the permeable of heavy-metal composite pollution soil, humus and microorganism
Reactive tank (PRB), makes two electrodes be separated by it, applies constant current stable DC voltage respectively at two electrodes, makes reactive tank
After voltage gradient suffered by interior mixture is 1 V/cm, energization 4-8 days, the permeable reactive tank (PRB) of removal, heavy metal ion from
Removed in soil, it is comprised the following steps that：
(1) a certain amount of heavy-metal contaminated soil and humus are chosen, according to heavy-metal contaminated soil and humus mass ratio
(g：G) it is 10:1 ratio is well mixed, and is added into deionized water, and the mixture-metal Polluted Soil that moisture content is 30% is made
Earth is standby；
(2) choose a certain amount of microorganism fungus kind bacillus coagulans (Bacillus coagulans) or chromium reducing bacteria
(Microbacterium), bacillus coagulans and chromium reducing bacteria are seeded in LB liquid medium, the composition of the culture medium
For the g L of sodium chloride 5-1, the g L of yeast extract 5-1, the g L of tryptone 10-1, pH 7.0 is 30 DEG C in temperature, to turn
Speed is the 160 rpm h of oscillator shaken cultivation 24, obtains bacterium solution standby；
(3) by bacterium solution obtained by the mixture-metal contaminated soil obtained by step (1) and step (2) according to mass volume ratio (g：
ML it is) 10:1 ratio mixing, is put into electrolytic cell after mixing and carries out activation culture 1-2 days；After activation, a pole anode is connected
Positive source, a pole negative electrode is switched on power negative pole, is connected direct current heavy metal contaminated soil and is repaired, in voltage gradient
For energization under the conditions of 1 V/cm 3-8 days, the soil of heavy metal pollution removing is obtained；
(4) it is powered after terminating and removes soil and permeable reactive barrier (PRB), and then obtains the soil for removing removing heavy metals.
2. a kind of method of utilization microbial association EK-PRB restoration of soil polluted by heavy metal according to claim 1, its
It is characterised by：The microorganism be bacillus coagulans (Bacillus coagulans), chromium reducing bacteria
(Microbacterium) in one kind or two kinds.
3. a kind of method of utilization microbial association EK-PRB restoration of soil polluted by heavy metal according to claim 1, its
It is characterised by：The humus is one kind in natural fertile soil, humic acid or two kinds.
4. a kind of method of utilization microbial association EK-PRB restoration of soil polluted by heavy metal according to claim 1, its
It is characterised by：Method as described above, it is preferable that the permeable reactive barrier (PRB) is built-in with the ecological sorbing material of filling.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108326030A (en) * | 2018-01-11 | 2018-07-27 | 上海理工大学 | The heavy metal-polluted soil prosthetic device of convertible array-type electrode |
| CN108580533A (en) * | 2018-05-08 | 2018-09-28 | 中冶节能环保有限责任公司 | A kind of method and structure carrying out contaminated site risk management and control using humic acid |
| CN109317506A (en) * | 2018-09-05 | 2019-02-12 | 上海大学 | The method repaired the electric device of As polluted soil and repair As polluted soil |
| CN109702008A (en) * | 2018-12-29 | 2019-05-03 | 上海大学 | The method that reducing agent/chelating agent strengthens electro reclamation arsenic chromium combined contamination soil |
| CN109821885A (en) * | 2019-03-06 | 2019-05-31 | 中新曜昂环境修复(江苏)有限公司 | The EK-PRB device of packaged type reparation combined contamination soil |
| CN109909293A (en) * | 2019-03-11 | 2019-06-21 | 上海大学 | A kind of device and method of stick electrode joint PRB technology in-situ remediation soil polluted by heavy metals |
| CN110076182A (en) * | 2018-01-26 | 2019-08-02 | 蔡永辉 | A kind of bicyclic synchronous circulating type is electronic-permeable reactive barrier soil remediation equipment |
| CN110369485A (en) * | 2019-07-08 | 2019-10-25 | 迪天环境技术南京股份有限公司 | A kind of electronic-permeable reactive barrier combined remediation method of heavy-metal contaminated soil |
| CN111069273A (en) * | 2019-12-16 | 2020-04-28 | 安徽洁然环境科技有限公司 | Application of microbial remediation ball space filling PRB (physical resource block) to assisting electric remediation of site pollution |
| CN111136094A (en) * | 2018-11-02 | 2020-05-12 | 中国石油化工股份有限公司 | Method for restoring polluted soil and underground water |
| CN112692051A (en) * | 2021-01-25 | 2021-04-23 | 明志科技大学 | Method and equipment for removing pollutants by using beneficial microorganism mixed bacterial liquid |
| CN113182349A (en) * | 2021-06-08 | 2021-07-30 | 福州大学 | Method for restoring chromium-polluted soil by utilizing electro-dynamic coupling permeation reaction wall |
| CN113582327A (en) * | 2021-07-12 | 2021-11-02 | 东华大学 | Method for restoring soil and underground water by pulse motor-waste textile hydrothermal carbon infiltration reaction wall in cooperation with plants |
| CN113695380A (en) * | 2021-09-07 | 2021-11-26 | 天津大学 | Electrode system device for repairing soil heavy metal pollutants |
| CN114535277A (en) * | 2022-03-04 | 2022-05-27 | 上海大学 | Application of iron-containing steel slag combined thermal desorption technology in remediation of phthalate-polluted soil and remediation method thereof |
| CN115465938A (en) * | 2022-10-08 | 2022-12-13 | 哈尔滨工业大学 | Underground water electrodynamic force repairing coupling in-situ regeneration PRB integrated device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108326030A (en) * | 2018-01-11 | 2018-07-27 | 上海理工大学 | The heavy metal-polluted soil prosthetic device of convertible array-type electrode |
| CN108326030B (en) * | 2018-01-11 | 2020-11-24 | 上海理工大学 | Soil heavy metal prosthetic devices of convertible array electrode |
| CN110076182A (en) * | 2018-01-26 | 2019-08-02 | 蔡永辉 | A kind of bicyclic synchronous circulating type is electronic-permeable reactive barrier soil remediation equipment |
| CN108580533A (en) * | 2018-05-08 | 2018-09-28 | 中冶节能环保有限责任公司 | A kind of method and structure carrying out contaminated site risk management and control using humic acid |
| CN108580533B (en) * | 2018-05-08 | 2023-10-17 | 中冶节能环保有限责任公司 | Method and structure for controlling pollution site risk by using humic acid |
| CN109317506A (en) * | 2018-09-05 | 2019-02-12 | 上海大学 | The method repaired the electric device of As polluted soil and repair As polluted soil |
| CN111136094A (en) * | 2018-11-02 | 2020-05-12 | 中国石油化工股份有限公司 | Method for restoring polluted soil and underground water |
| CN111136094B (en) * | 2018-11-02 | 2022-01-04 | 中国石油化工股份有限公司 | Method for restoring polluted soil and underground water |
| CN109702008A (en) * | 2018-12-29 | 2019-05-03 | 上海大学 | The method that reducing agent/chelating agent strengthens electro reclamation arsenic chromium combined contamination soil |
| CN109821885A (en) * | 2019-03-06 | 2019-05-31 | 中新曜昂环境修复(江苏)有限公司 | The EK-PRB device of packaged type reparation combined contamination soil |
| CN109909293A (en) * | 2019-03-11 | 2019-06-21 | 上海大学 | A kind of device and method of stick electrode joint PRB technology in-situ remediation soil polluted by heavy metals |
| CN109909293B (en) * | 2019-03-11 | 2020-02-14 | 上海大学 | Device and method for in-situ remediation of heavy metal contaminated soil by using rod-shaped electrode combined with PRB technology |
| CN110369485A (en) * | 2019-07-08 | 2019-10-25 | 迪天环境技术南京股份有限公司 | A kind of electronic-permeable reactive barrier combined remediation method of heavy-metal contaminated soil |
| CN111069273A (en) * | 2019-12-16 | 2020-04-28 | 安徽洁然环境科技有限公司 | Application of microbial remediation ball space filling PRB (physical resource block) to assisting electric remediation of site pollution |
| CN112692051A (en) * | 2021-01-25 | 2021-04-23 | 明志科技大学 | Method and equipment for removing pollutants by using beneficial microorganism mixed bacterial liquid |
| CN113182349A (en) * | 2021-06-08 | 2021-07-30 | 福州大学 | Method for restoring chromium-polluted soil by utilizing electro-dynamic coupling permeation reaction wall |
| CN113582327A (en) * | 2021-07-12 | 2021-11-02 | 东华大学 | Method for restoring soil and underground water by pulse motor-waste textile hydrothermal carbon infiltration reaction wall in cooperation with plants |
| CN113695380A (en) * | 2021-09-07 | 2021-11-26 | 天津大学 | Electrode system device for repairing soil heavy metal pollutants |
| CN114535277A (en) * | 2022-03-04 | 2022-05-27 | 上海大学 | Application of iron-containing steel slag combined thermal desorption technology in remediation of phthalate-polluted soil and remediation method thereof |
| CN114535277B (en) * | 2022-03-04 | 2023-09-15 | 上海大学 | Application of iron-containing steel slag combined with thermal desorption technology in repairing phthalate polluted soil and repairing method thereof |
| CN115465938A (en) * | 2022-10-08 | 2022-12-13 | 哈尔滨工业大学 | Underground water electrodynamic force repairing coupling in-situ regeneration PRB integrated device and method |
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