CN105665437B - A kind of device using Electroremediation contaminated soil - Google Patents
A kind of device using Electroremediation contaminated soil Download PDFInfo
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- CN105665437B CN105665437B CN201610208282.3A CN201610208282A CN105665437B CN 105665437 B CN105665437 B CN 105665437B CN 201610208282 A CN201610208282 A CN 201610208282A CN 105665437 B CN105665437 B CN 105665437B
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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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Abstract
The invention discloses a kind of devices using Electroremediation contaminated soil, belong to Waste Disposal Technology field.The device of the invention uses the shelling machine of hexagon, six roots of sensation anode assembly forms regular hexagon, cathode assembly is being hit exactly, include DC power supply, electrolyte feed chamber, soil remediation reactor, ion-exchange chamber, electrolyte mixing chamber and waste collection room, in soil remediation reactor insertion soil in device, cathode, anode link DC power supply, form DC electric field, make heavy metal, organic matter etc. the electromigration and electroosmotic flow the effects of under removed.Device can adjust processing area according to the size in processing place, or be handled in batches according to the size shape in place.
Description
Technical field
The present invention relates to a kind of devices using Electroremediation contaminated soil, belong to Waste Disposal Technology field.
Background technique
In recent years, due to the sharp increase of population, industrial fast development produces a large amount of various types of pollutions
Object.Solid waste is constantly stacked and is toppled over to soil surface, and harmful waste water is constantly permeated into soil, the pernicious gas in atmosphere
And floating dust also constantly lands in the soil with rainwater, results in soil pollution.These pollutants are constantly enriched in by food chain
In organism, there is very big potential hazard to human health.Soil pollutant can be divided mainly into heavy metal and organic matter, have
The features such as concealment, long-term effect and refractory organics, therefore be difficult to be handled with conventional method.
Biological prosthetic technique is mainly using the plant absorption soil pollution for having stronger absorption pollutant ability, or utilizes
Microbial degradation purification soil, but most of heavy metal hyperaccumulative plant plant is short and small, biomass is low, slow growth, thus
Remediation efficiency is greatly affected, and is not easy do mechanization operation；Microorganism requires external environmental condition very stringent simultaneously, makes into
Function, which is introduced a fine variety, to be severely limited.The method of chemical remediation process contamination soil is also paid close attention to.It is main to pass through addition chemical remediation
Substance is chemically reacted with soil pollutant, so that pollutant is degraded or toxicity reduces, it is molten such as chemical leaching technology
Liquid microwave leaching technology, chemical fastening techniques etc..But chemical remediation technique often generates secondary pollution, and is only applicable to infiltration system
The higher soil of number.
Have many advantages, such as compared with biological prosthetic technique, chemical remediation technique etc. using DC electric field beneficiation technologies: it
Polluter type applicatory is very extensive；Can apply to saturation and unsaturation, the soil of stickiness and half stickiness simultaneously has
Quite high economic benefit；It can be used in combination simultaneously with other technologies；It is small to the property and structure harm of soil, it is not easy to be formed secondary
Pollution；It is more suitable for the low compact substance soil etc. of comprehensive treatment infiltration coefficient.
Electro reclamation is divided into electro reclamation and dystopy electro reclamation in situ according to the difference in the processing place of rehabilitating soil
Method.Current existing dystopy electro reclamation is exactly that contaminated soil is excavated, and is transported in the device of electro reclamation and carries out
Electrokinetic process reparation, then transport processed soil back original place, this showering processing of in original soil is filled again
Method, not only to the vegetation of same court, ecological environment destruction is very big, and excavates transport soil, so that processing cost is greatly
It improves.The electro reclamation in situ that the present invention uses is then to be equipped using electro reclamation, it is placed in place former address, directly
Ground connection carries out electro reclamation processing to soil.In contrast, in-situ immobilization method is smaller to original ecological environment destruction, and
Because not excavating to the transport of soil, cost has largely been saved.
The electrode of existing electro reclamation is parallel arrangement, electric field between anodic-cathodic, electric current is constant, with reparation into
Row, due to the enrichment and removal of pollutant, current density can be gradually become smaller, and remediation efficiency is gradually reduced.
Summary of the invention
In order to overcome the above problem, the present invention provides a kind of devices using Electroremediation contaminated soil.The present invention
The main part of device is designed to regular polygon, because the electric field that the arrangement of regular polygon is formed is inhomogeneous field energy
It is effective to reinforce the migration of pollution in the soil, be conducive to remove pollutant.And in being arranged in and use on the spot of regular polygon
Disposal field can be more effectively covered with, improve the covering efficiency of device, realize seamless coverage, do not omit any one place.
The major part of described device is the soil remediation reactor using the shelling machine of regular polygon；The soil is repaired
Multiple reactor is divided into anode electrolysis room, earth pillar room, catholyte chamber；Multiple anode electrolysis rooms are located at polygon vertex, single yin
Pole tank house is located at center.
In one embodiment of the invention, the polygon is regular hexagon.
In one embodiment of the invention, electrode is equipped in the anode electrolysis room and catholyte chamber, respectively with
The positive and negative anodes of DC power supply are connected.
In one embodiment of the invention, cone is contained in the anode electrolysis room, catholyte chamber bottom, convenient
The electrode chamber of device is safely tucked into soil.
In one embodiment of the invention, the compound electric that the electrode is constituted using graphite and the mixing of acid-base property zeolite
Pole.
In one embodiment of the invention, the electrode uses the form of non-uniform electrodes, is laid with regular hexagon
Mode arrange, can disassemble, be convenient for changing.
In one embodiment of the invention, described device further include DC power supply, peristaltic pump, electrolyte feed chamber,
Ion-exchange chamber, electrolyte mixing chamber, waste collection room.
In one embodiment of the invention, the electrolyte feed chamber passes through peristaltic pump and electrolyte mixing chamber phase
Even；The electrolyte mixing chamber is connected with catholyte chamber, anode electrolysis room, ion-exchange chamber by peristaltic pump respectively；It is described
Catholyte chamber is connected with ion-exchange chamber by peristaltic pump.
In one embodiment of the invention, the anode electrolysis room is connected with waste collection room.
In one embodiment of the invention, the peristaltic pump is mechanical diaphragm type metering pump.
In one embodiment of the invention, contain ion exchange material in the ion-exchange chamber, for filter from
The ion in electrolyte sucked out in catholyte chamber.
In one embodiment of the invention, the ion exchange chamber interior is equipped with 4 tunics, and internal layer is handed over filled with ion
Change resin.
It in one embodiment of the invention, further include liquid collection chamber in described device；Catholyte chamber and liquid
Have one layer of semi-permeable membrane between collecting chamber, so that metal ion from catholyte chamber is entered liquid collection chamber and cannot be from liquid
Collecting chamber is re-introduced into cathode electrode room.
In one embodiment of the invention, the electrolyte mixing chamber is by the electrolysis after ion-exchange chamber is processed
Liquid is mixed with the electrolyte in electrolyte feed chamber, is again introduced into catholyte chamber or anode electrolysis room, is recycled.
A second object of the present invention is to provide it is a kind of enrichment contaminated soil in heavy metal and/or organic matter method,
It is to utilize the device.
Described device includes DC power supply (1), soil remediation reactor (11), ion-exchange chamber (7), electrolyte mixing chamber
(8) and waste collection room (9)；The soil remediation reactor (11) is divided into anode electrolysis room (4), earth pillar room (10), yin
Pole tank house (5), soil to be processed are equipped with electrolysis as in earth pillar room (10) in anode electrolysis room (4) and catholyte chamber (5)
Liquid, and electrode (6) are set, it is connected respectively with the positive and negative anodes of DC power supply (1), electrolyte infiltrates the soil in earth pillar room (10)；
Electrolyte enters anode electrolysis room (4) by electrolyte mixing chamber (8), and the electrolyte of catholyte chamber (5) is entered by electrokinesis
Cation is removed through ion-exchange chamber (7), enters back into electrolyte mixing chamber (8) and the raw material electricity from electrolyte feed chamber (3)
Liquid mixing is solved, the electrolyte in electrolyte mixing chamber (8) enters anode electrolysis room (4) or catholyte chamber (5).
In one embodiment of the invention, in the method, anode electrolysis room (4) are full of the electrolyte of polluter
At into garbage collection (9), it is further processed.
In one embodiment of the invention, described device further includes mechanical diaphragm type metering pump (2), be responsible for addition or
The electrolyte in anode electrolysis room (4) and catholyte chamber (5) is reduced, realizes automatic operation.
In one embodiment of the invention, the mechanical diaphragm type metering pump is the metering of MGM0002 mechanical diaphragm type
Pump, flow velocity 50mL/min.
In one embodiment of the invention, in the method, interelectrode distance 57cm, voltage gradient 2V/cm.
In one embodiment of the invention, the electrolyte is 0.01MNaCl solution or water or its mixing.
In one embodiment of the invention, Dowfax8390 anion surface active is also added in the tank house
Agent is as electrolysis control liquid.
In one embodiment of the invention, the method is that will be placed between anodic-cathodic for examination soil, with pump
It is passed through electrolyte into yin-yang tank house, so that the height of anode and cathode liquid level of electrolyte and soil sample is consistent.Continue to yin-yang
Pole room is passed through electrolyte for 24 hours, and the soil liquid is made to reach saturation state, then opens controllable DC power supply and is initially powered up, voltage
Gradient is run 7-21 days between 0.5-6.0V/cm, closes power supply.Therebetween can also intermittently power-on, reduce energy consumption.
Beneficial effects of the present invention:
(1) device is designed to regular hexagon, because the electric field that the arrangement of regular hexagon is formed is inhomogeneous field
The migration of inorganic ions in the soil can effectively be reinforced, be conducive to remove pollutant.And regular hexagon is arranged on the spot
Disposal field can be more effectively covered in, improve the covering efficiency of device, realize seamless coverage, do not omit any one ground
Side.
(2) device of Electroremediation contaminated soil provided by the invention is when heavy metal in soil concentration is in 500mg/kg,
Voltage gradient is between 1.0-2.0V/cm, and after running 360h, heavy metal in soil can be enriched to cathodic region, and mobility reaches
85% or more.Therefore, the present apparatus can significantly improve the mobility of heavy metal, be a kind of effective experimental rig, have very
Big practical engineering application value.
(3) device of Electroremediation contaminated soil provided by the invention, which is capable of handling, generates damage to soil, reduces it
Quality and use value, and energy polluted surface water and underground water, cause damages to human health and agricultural production any heavy
Metal/organic matter.More specifically refer to that density is greater than 4.0g/cm3, toxicity is generated when can generate toxicity or excess to organism
Metallic element and metalloid element, such as mercury, good fortune, lead, chromium, arsenic, copper, zinc, nickel, manganese and persistent organism, organic poison
Object.
Detailed description of the invention
Fig. 1 is the top view of soil remediation reactor；Wherein, 4 anode electrolysis rooms, 5 catholyte chamber；
Fig. 2 is the schematic diagram using a kind of embodiment of the device of Electroremediation contaminated soil；1 DC power supply；2 machines
Tool diaphragm metering pump；3 electrolyte feed chambers；4 anode electrolysis rooms；5 catholyte chamber；6 electrodes；7 ion-exchange chamber；8 electrolysis
Liquid mixing chamber；9 waste collection rooms；10 earth pillar rooms；11 soil remediation reactors；12 liquid collection chambers；
Fig. 3: the schematic perspective view of soil remediation reactor；Wherein, 4 anode electrolysis room；5 catholyte chamber, 12 liquid
Body collecting chamber, 13 semi-permeable membranes.
Specific embodiment
Below by embodiment, the present invention is further described in detail.
The sampling area that five equal parts are set gradually from anode region to cathodic region is respectively 1#、2#、3#、4#、5#, sampling and measuring repairs
The pollutant concentration in each region in multiple rear soil.
Embodiment 1: the device of Electroremediation contaminated soil is utilized
Device using Electroremediation contaminated soil of the invention, major part are the shelling machine using regular polygon
Soil remediation reactor；The soil remediation reactor is divided into anode electrolysis room, earth pillar room, catholyte chamber；Multiple anodes
Tank house is located at polygon vertex, and single catholyte chamber is located at center.It is equipped in the anode electrolysis room and catholyte chamber
Electrode is connected with the positive and negative anodes of DC power supply respectively.Cone is contained in the anode electrolysis room, catholyte chamber bottom, convenient
The electrode chamber of device is safely tucked into soil.
Preferably, the polygon is regular hexagon.
The device of the invention can adjust processing area according to the size in processing place, or according to the size shape in place point
Batch is handled.
Embodiment 2: the device of Electroremediation contaminated soil is utilized
As shown in Figure 1, being a kind of building form of the device of the invention, using the shelling machine of hexagon, six roots of sensation anode
Device forms regular hexagon, and cathode assembly is being hit exactly.Comprising DC power supply 1, soil remediation reactor 11, ion-exchange chamber 7,
Electrolyte mixing chamber 8 and waste collection room 9；The soil remediation reactor 11 be divided into anode electrolysis room 4, earth pillar room 10,
Catholyte chamber 5, soil to be processed are equipped with electrolyte, and electrode is arranged as in earth pillar room 10 in anode chamber 4 and cathode chamber 5
6, it is connected respectively with the positive and negative anodes of DC power supply 1, electrolyte infiltrates the soil in earth pillar room 10.
Contain ion exchange material in the ion-exchange chamber 7, for filtering the electrolysis sucked out from catholyte chamber 5
Ion in liquid.The electrolyte mixing chamber 8 will be in the electrolyte and electrolyte feed chamber 3 after ion-exchange chamber 7 is processed
Electrolyte mixing, be again introduced into catholyte chamber 5 or anode electrolysis room 4, recycled.
The electrolyte feed chamber 3 is connected by mechanical diaphragm type metering pump 2 with electrolyte mixing chamber 8；The electrolyte
Mixing chamber 8 is connected with catholyte chamber 5, anode electrolysis room 4, ion-exchange chamber 7 by mechanical diaphragm type metering pump respectively；It is described
Catholyte chamber 5 is connected with ion-exchange chamber 7 by peristaltic pump.
It further include liquid collection chamber 12 in described device；Have one and half between catholyte chamber 5 and liquid collection chamber 12
Permeable membrane 13, allows metal ion to enter liquid collection chamber from catholyte chamber and cannot be re-introduced into yin from liquid collection chamber
Pole electrode chamber.
Embodiment 3: the reparation of chromium-polluted soil
Using device shown in Fig. 2, the main body of electric power enriching heavy metal device is the organic glass of a hexahedron
Device, composition include earth pillar room (L × H=50cm × 65cm), electrode chamber (16cm2× 65cm), it is constant voltage dc source, compound
Graphite electrode (12cm2× 50cm), mechanical diaphragm type vacuum pump etc..Electrolyte enters anode electricity by electrolyte mixing chamber when experiment
Pole room removes cation through ion-exchange chamber by the electrolyte that electrokinesis enters cathode electrode room, enters back into electrolyte mixing
After room is mixed with raw material electrolyte, into anode electrode room.It gives up finally, electrolyte of the anode electrolysis room full of polluter enters
Expect to be further processed at collection.Interelectrode distance is 57cm, voltage gradient 2V/cm.Electrolyte is that 0.01MNaCl is molten
Liquid.Select MGM0002 mechanical diaphragm type metering pump, flow velocity 50mL/min.
Experiment soil is cohesive soil.Soil sampling, air-dry it is levigate, cross after 2mm sieve store it is stand-by.Weigh a certain amount of heavy chromium
Sour potassium, is dissolved in deionized water, is added in pedotheque, and mixing is sufficiently stirred, is subsequently placed in glass container and trains at room temperature
Support 15d.By measurement, this is about 500mg/kg, moisture content 16.2% for the concentration for trying Cr in pedotheque.
Electric power enrichment experiment operating procedure: before experiment starts, NaCl solution being first added into earth pillar room, then will be for examination
Soil sample slowly injects earth pillar room, is sufficiently mixed (soil ratio 1:2) in NaCl solution to remove the bubble in soil, avoids increasing
Resistance.Anode and cathode liquid is distilled water, make anode liquid level, for examination soil and cathode liquid level in sustained height, open peristaltic pump, to
Distilled water is passed through in the anode chamber and the cathode chamber, operation for 24 hours, makes the indoor soil liquid of earth pillar reach saturation state.Then it is initially powered up, two
Voltage across poles perseverance is 114V (i.e. potential gradient is 2V/cm).After examination soil treatment 360h, power supply is closed, is taken from reaction unit
It the soil sample in each region and air-dries under greenhouse to constant weight out, is then ground to fine particle, it is stand-by to cross 2mm sieve storage, then to it
Micro-wave digestion is carried out, the concentration of Cr in flame atomic adsorption spectrophotometry hair measurement soil is finally measured.
As the result is shown: the pH of soil is between 3.6-9.7 (from anode region to cathodic region) after experiment, and electric osmose flow is most
Height can arrive 650mL；Heavy metal Cr is migrated in the form of oxygen-containing acid ion from cathodic region toward anode region, wherein 4#、5#Sampling area Cr
(VI) mobility respectively reaches 63.7% and 54.2%, and 2#、3#Soil in the mobility of Cr (VI) gradually decrease, and 1#It takes
The content of Cr (VI) is up to 877mg/kg at sample.This illustrates that the heavy metal in soil can be quickly at certain under the action of electric power
The enrichment of one region.
Embodiment 4: the reparation of phenanthrene-polluted soil
As identical experimental provision has carried out luxuriant and rich with fragrance enrichment experiment to identical phenanthrene-polluted soil in above-described embodiment 3
Experiment soil is cohesive soil.Soil sampling, air-dry it is levigate, cross after 2mm sieve store it is stand-by.A certain amount of phenanthrene is weighed,
It is dissolved in acetone, is added in pedotheque, mixing is sufficiently stirred, is subsequently placed in glass container and cultivates 15d at room temperature.By
Measurement, this is about 500mg/kg, moisture content 16.8% for the concentration for trying pedotheque China and Philippines.
Electric power enrichment experiment operating procedure: before experiment starts, NaCl solution being first added into earth pillar room, then will be for examination
Soil sample slowly injects earth pillar room, is sufficiently mixed (soil ratio 1:2) in NaCl solution to remove the bubble in soil,
It avoids increasing resistance.Anode and cathode liquid is distilled water, makes anode liquid level, for trying soil and cathode liquid level in sustained height, opens
Peristaltic pump, distilled water is passed through into the anode chamber and the cathode chamber, and operation for 24 hours, makes the indoor soil liquid of earth pillar reach saturation state.Then it opens
Begin to be powered, two voltage across poles perseverances are 114V (i.e. potential gradient is 2V/cm).After examination soil treatment 360h, power supply is closed, from anti-
Answer device to take out the soil sample in each region and air-dry under greenhouse to constant weight, be then ground to fine particle, cross the storage of 2mm sieve to
With, then ultrasonic extraction-high performance liquid chromatography is used, finally measure the concentration of soil China and Philippines.
As the result is shown: the pH of soil is between 3.8-9.1 (from anode region to cathodic region) after experiment, and electric osmose flow is most
Height can arrive 610mL；Phenanthrene is progressively enriched with from anode region to cathode zone, wherein 1#、2#The mobility of sample point phenanthrene respectively reaches
52.4% and 41.5%, 3#、4#The mobilities of soil China and Philippines gradually decrease, and 5#Luxuriant and rich with fragrance content is up to 937mg/kg at sampling.
This illustrates that the organic matter in soil can be quickly enriched in a certain region under the action of electric power.
The reparation of embodiment 5:Cr- phenanthrene combined contamination soil
As identical experimental provision has carried out Cr and Fei Fu to identical Cr- phenanthrene combined contamination soil in above-described embodiment 2
Collection experiment.
Experiment soil is cohesive soil.Soil sampling, air-dry it is levigate, cross after 2mm sieve store it is stand-by.Weigh a certain amount of heavy chromium
Sour potassium and phenanthrene, are dissolved in deionized water and acetone respectively, are added in pedotheque, and mixing is sufficiently stirred, and are subsequently placed in glass appearance
15d is cultivated in device at room temperature.By measurement, this is about 500mg/kg, moisture content for Cr in examination pedotheque and luxuriant and rich with fragrance concentration
It is 16.5%.
Electric power enrichment experiment operating procedure: before experiment starts, NaCl solution being first added into earth pillar room, then will be for examination
Soil sample slowly injects earth pillar room, is sufficiently mixed (soil ratio 1:2) in NaCl solution to remove the bubble in soil, avoids increasing
Resistance.Anode and cathode liquid is distilled water, make anode liquid level, for examination soil and cathode liquid level in sustained height, open peristaltic pump,
Distilled water is passed through into the anode chamber and the cathode chamber, operation for 24 hours, makes the indoor soil liquid of earth pillar reach saturation state.Then it is initially powered up,
Two voltage across poles perseverances are 114V (i.e. potential gradient is 2V/cm).After examination soil treatment 360h, power supply is closed, from reaction unit
It takes out the soil sample in each region and air-dries under greenhouse to constant weight, be then ground to fine particle, it is stand-by to cross 2mm sieve storage, then use
The concentration of Cr in micro-wave digestion-atomic absorption spectrophotometry measurement soil, using ultrasonic extraction-high performance liquid chromatography
Measure the concentration of soil China and Philippines.
As the result is shown: the pH of soil is between 3.0-9.8 (from anode region to cathodic region) after experiment, and electric osmose flow is most
Height can arrive 590mL；Phenanthrene is progressively enriched with from anode region to cathode zone, wherein 1#、2#The mobility of sample point phenanthrene respectively reaches
49.4% and 38.5%, 3#、4#The mobilities of soil China and Philippines gradually decrease, and 5#Luxuriant and rich with fragrance content is up to 985mg/kg at sampling.
Opposite heavy metal Cr is migrated in the form of oxygen-containing acid ion from cathodic region toward anode region, wherein 4#、5#Sample point Cr (VI's) moves
Shifting rate respectively reaches 65.7% and 58.2%, and 2#、3#Soil in the mobility of Cr (VI) gradually decrease, and 1#Cr at sampling
(VI) content is up to 847mg/kg.This illustrates that the soil restoring device can be used to remediating heavy metal and organic compound contaminated
Soil, and a certain area by enriching pollutants in the soil.
The reparation of embodiment 6:Cr- phenanthrene combined contamination soil
If identical experimental provision has carried out enrichment experiment to identical combined contamination soil in above-described embodiment 2, difference
Place is to joined 10 times of cmc (critical micelle concentration) Dowfax8390 anionic surfactant conducts toward the two poles of the earth tank house
Electrolysis control liquid.
Electric power enrichment experiment operating procedure is slightly different with the operation in embodiment 1.Before experiment starts, first toward earth pillar room
Middle addition NaCl solution, then will for examination soil sample slowly inject earth pillar room, in NaCl solution be sufficiently mixed (soil ratio 1:2) with
The bubble in soil is removed, avoids increasing resistance.Anode and cathode liquid is distilled water, makes anode liquid level, for examination soil and catholyte
Metering pump is opened in sustained height in face, distilled water is passed through into the anode chamber and the cathode chamber, for 24 hours, the indoor soil liquid of earth pillar reaches for operation
Saturation state.Then it is initially powered up, two voltage across poles perseverances are 114V (i.e. potential gradient is 2V/cm).When experiment starts, Xiang Yinyang
It is distilled water that pole room, which is passed through electrolyte, when reaction unit runs 12h, starts to be passed through 10 times of cmc into cathode chamber
Dowfax8390 solution, always handling for examination soil is 360h, closes power supply later, is taken out from each thief hatch of reaction unit each
The soil sample in region simultaneously air-dries under greenhouse to constant weight, is then ground to fine particle, it is stand-by to cross 200mm sieve storage, then use microwave
The concentration of Cr in resolution-atomic absorption spectrophotometry measurement soil, using ultrasonic extraction-high effective liquid chromatography for measuring
The concentration of soil China and Philippines.
As the result is shown: the pH of soil is between 2.7-8.9 (from anode region to cathodic region) after experiment, and electric osmose flow is most
Height can arrive 640mL；Phenanthrene is progressively enriched with from anode region to cathode zone, wherein 1#、2#The mobility of sample point phenanthrene respectively reaches
60.4% and 57.5%, 3#、4#The mobilities of soil China and Philippines gradually decrease, and 5#Luxuriant and rich with fragrance content is up to 805mg/kg at sampling.
Opposite heavy metal Cr is migrated in the form of oxygen-containing acid ion from cathodic region toward anode region, wherein 4#、5#Sample point Cr's (VI)
Mobility respectively reaches 85.7% and 81.2%, and 2#、3#Soil in the mobility of Cr (VI) gradually decrease, and 1#Cr at sampling
(VI) content is up to 702mg/kg.This illustrates after surfactant D owfax8390 is added into electrolyte, can promote dirt
The migration of object in the soil is contaminated, the remediation efficiency of pollutant is improved.
Although the present invention has been described by way of example and in terms of the preferred embodiments, it is not intended to limit the invention, any to be familiar with this skill
The people of art can do various change and modification, therefore protection model of the invention without departing from the spirit and scope of the present invention
Enclosing subject to the definition of the claims.
Claims (5)
1. a kind of device using Electroremediation contaminated soil, which is characterized in that the major part of described device is using just
The soil remediation reactor of the shelling machine of polygon；The soil remediation reactor is divided into anode electrolysis room, earth pillar room, cathode
Tank house；Multiple anode electrolysis rooms are located at polygon vertex, and single catholyte chamber is located at center；
Described device further includes DC power supply, peristaltic pump, electrolyte feed chamber, ion-exchange chamber, electrolyte mixing chamber, waste liquid receipts
Collect room；
Cone is contained in the anode electrolysis room, catholyte chamber bottom, and the tank house of device is facilitated to be safely tucked into soil；
The electrolyte feed chamber is connected by peristaltic pump with electrolyte mixing chamber；The electrolyte mixing chamber is electric with cathode respectively
Solution room, anode electrolysis room, ion-exchange chamber are connected by peristaltic pump；The catholyte chamber and ion-exchange chamber pass through peristaltic pump
It is connected；
It further include liquid collection chamber in described device；Have one layer of semi-permeable membrane between catholyte chamber and liquid collection chamber；
The polygon is regular hexagon.
2. a kind of method of heavy metal and/or organic matter in enrichment contaminated soil, is to utilize device described in claim 1.
3. according to the method described in claim 2, it is characterized in that, described device includes DC power supply (1), soil remediation reaction
Device (11), ion-exchange chamber (7), electrolyte mixing chamber (8) and waste collection room (9)；The soil remediation reactor (11)
It is divided into anode electrolysis room (4), earth pillar room (10), catholyte chamber (5), soil to be processed is placed in earth pillar room (10), anode
Electrolyte is housed in tank house (4) and catholyte chamber (5), and electrode (6) are set, respectively with the positive and negative anodes of DC power supply (1)
It is connected, electrolyte infiltrates the soil in earth pillar room (10)；Electrolyte enters anode electrolysis room (4) by electrolyte mixing chamber (8), by
The electrolyte that electrokinesis enters catholyte chamber (5) removes cation through ion-exchange chamber (7), enters back into electrolyte mixing chamber
(8) it is mixed with the raw material electrolyte from electrolyte feed chamber (3), the electrolyte in electrolyte mixing chamber (8) enters anode electricity
Solve room (4) or catholyte chamber (5).
4. according to the method described in claim 2, it is characterized in that, in the anode electrolysis room (4) and catholyte chamber (5) also
Added with Dowfax8390 anionic surfactant as electrolysis control liquid.
5. according to the method described in claim 2, it is characterized in that, the method be will for examination soil be placed on anodic-cathodic it
Between, it is passed through electrolyte into yin-yang tank house with pump, so that the height of anode and cathode liquid level of electrolyte and soil sample is consistent, after
Continue to the anode chamber and the cathode chamber and be passed through electrolyte for 24 hours, the soil liquid is made to reach saturation state, then opens controllable DC power supply and start to lead to
Electricity or intermittently power-on, voltage gradient are run 7-21 days between 0.5-6.0V/cm.
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|---|---|---|---|---|
| CN106513433B (en) * | 2017-01-20 | 2017-12-05 | 中国地质科学院矿产资源研究所 | Electric repair turnover device for heavy metal contaminated soil |
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