CN106040737A - Electrokinetic remediation experiment system for heavy metal in soil and experiment method of electrokinetic remediation experiment system - Google Patents
Electrokinetic remediation experiment system for heavy metal in soil and experiment method of electrokinetic remediation experiment system Download PDFInfo
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- CN106040737A CN106040737A CN201610572098.7A CN201610572098A CN106040737A CN 106040737 A CN106040737 A CN 106040737A CN 201610572098 A CN201610572098 A CN 201610572098A CN 106040737 A CN106040737 A CN 106040737A
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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
- B09C2101/00—In situ
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- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides an electrokinetic remediation experiment system for heavy metal in soil and an experiment method of the electrokinetic remediation experiment system. The electrokinetic remediation experiment system comprises an electrokinetic remediation chamber device, an electrolyte purification treatment device, an automatic pH control device and an automatic soil sampling device. The automatic soil sampling device comprises a linear motor and a sampler. An electric push rod is downwards installed on a rotor of the linear motor. The sampler is installed at the lower end of the electric push rod. The electrokinetic remediation chamber device comprises a direct-current power source and an experiment box. Two partition boards are arranged in the experiment box, and the experiment box is sequentially divided into an anode chamber, a soil chamber and a cathode chamber from left to right by the two partition boards. Holes with the diameters being larger than or equal to 1 cm are evenly formed in the partition boards. Filter cloth is laid on the surface of one side of each partition board. A sliding rail of the linear motor is horizontally installed on the upper portion of the inner wall of the soil chamber. The electrokinetic remediation experiment system for heavy metal in soil is reasonable in design, automatic sampling of soil is achieved in a remediation experiment for heavy metal in soil, the pH values of a catholyte and the pH value of an anolyte can be controlled automatically, and subsequent purification treatment of the catholyte and the anolyte is achieved.
Description
Technical field
The invention belongs to technical field of soil remediation, be specifically related to a kind of heavy metal-polluted soil electro reclamation experimental system and
Experimental technique.
Background technology
At society, along with expanding economy and the quickening of urbanization process, the pollutant containing heavy metal pass through work
The various approach such as industry activity, agricultural production, transportation enter in soil, cause the severe contamination of heavy metal in soil,
Heavy metal pollution of soil is increasingly becoming one of environmental problem of increasingly paying close attention in the world.Mankind's activity result in heavy metal at soil
Middle excess deposition, has exceeded its environmental background value from far away, thus has caused serious environmental pollution.It is reported that China is by heavy metal
The farm land area polluted accounts for the 1/5 of China's total area under cultivation, so the reparation problem of heavy-metal contaminated soil is compeled at eyebrow
Eyelash.
The recovery technique of soil can be divided into in-situ immobilization and showering two kinds from mode of operation, because in-situ immobilization has
Have environmental effect little, can the advantages such as scene is carried out, economic benefit is high, the original position of researcher's heavy metal contaminated soil of various countries
Reparation has been done and has been studied widely.Physical, chemical method, bioanalysis three class can be divided into from operating principle.Peripheral doses mainly has
Soil moved in improve the original method, remove local method, method of digging, vitrification and pyrolysis absorption techniques；Chemical redemption mainly has soil washing, modifying agent
Method, fixing, the electric repairing technique of chemistry etc.；Biological restoration mainly has phytoremediation and microorganism remediation technology；Every kind of technology is all
There are respective limitation and the suitability.
Technology of Electrodynamics Renovation is a kind of emerging heavy-metal contaminated soil based technique for in-situ remediation, and its principle is by weight
The soil of metallic pollution inserts electrode, and applies unidirectional current at two ends, make pollutant occur electrochemistry anti-under electric field action
Should, heavy metal ion migrates under electromigration, electrodialysis and electrophoresis and four kinds of mechanism of free diffusing, is enriched in a certain region,
Reach to remove the purpose of heavy metal in soil pollutant eventually.Repairing efficiency is short, low cost because it has for technology of Electrodynamics Renovation
Honest and clean, operation is simple, the advantage of the worry of non-secondary pollution, and is accepted by increasing country and researcher, the most successfully should
In-situ immobilization for some heavy-metal contaminated soils.
Heavy metal-polluted soil electro reclamation experimental provision automaticity is low at present, and man's activity is relatively big, hinders to a certain extent
Hinder the development of heavy metal-polluted soil recovery technique.Along with the carrying out of electro reclamation electrode reaction, produce respectively greatly at negative electrode, anode
The OH of amount-And H+, OH-And H+Movement under electric field action causes the raising and lowering of soil pH, and then affects heavy metal ion and exist
Migration in soil, therefore control soil pH is one of key issue of heavy metal-polluted soil electro reclamation；In electro reclamation process
In, owing to requirement of experiment is different, the position of each sampled point is different, thus it is also run into numerous that soil carries out spot sampling
One of difficult problem；The polluters such as heavy metal can move in electrolyte in a large number, and the unreasonable place of electrolyte comprehends and causes environment
Pollute the waste with resource, so the purified treatment of electrolyte also becomes the problem needing solution badly.Thus, in the urgent need to providing one
Kind completely effectively can realize soil be automatically positioned sampling, the purified treatment of electrolyte and can to realize electrolyte pH controlled
Heavy metal-polluted soil electro reclamation device, and then improve electrokinetic remediation efficiency and automaticity, beneficially electric repairing technique
Carry out with further investigation.
Summary of the invention
The defect existed for prior art, the invention provides a kind of heavy metal-polluted soil electro reclamation experimental system and
Experimental technique, realizes the automatic sampling of soil, catholyte, the pH of anolyte in the heavy metal in-situ immobilization of soil
Can automatically control and the subsequent purification of electrolyte processes.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is as follows: a kind of heavy metal-polluted soil electro reclamation
Experimental system, including electro reclamation chamber device, electrolyte purification processing means, pH automaton and the automatic sampling cartridge of soil
Put；
Soil automatic sampling apparatus includes linear electric motors and sampler, the mover of linear electric motors is provided with down-set electronic
Push rod, sampler is arranged on electric pushrod bottom；
Electro reclamation chamber device includes DC source and experimental box, is provided with two pieces of dividing plates in experimental box, and two pieces of dividing plates are by proof box
It is divided into anode chamber, soil chamber and cathode chamber the most successively, dividing plate uniformly offers diameter more than or equal to 1cm's
Hole, a side surface upper berth of dividing plate is provided with filter cloth, and the slide rail of linear electric motors is horizontally arranged at the upper inside wall of soil chamber, sampler
Working end towards soil chamber；The upper inside wall level of anode chamber is provided with the first transverse slat, and the first transverse slat is sequentially provided with from left to right
First installing hole, the second installing hole, the 3rd installing hole, the 4th installing hole and the 5th installing hole, the first installing hole is provided with downwards
The first agitator arranged, the 3rd installing hole is provided with down-set anode electrode bar；The upper inside wall level of cathode chamber sets
The second transverse slat, the second transverse slat right-to-left is had to be sequentially provided with the 6th installing hole, the 7th installing hole, the 8th installing hole, the 9th installation
Hole and the tenth installing hole, the 6th installing hole is provided with the second down-set agitator, and the 8th installing hole is provided with down-set
Cathode electrode bar；DC source connects the first agitator, the second agitator, anode electrode bar and the moon by service cable respectively
Pole electrode stem；Air-vent is all offered on first transverse slat and the second transverse slat；
Electrolyte purification processing means includes anode cleaning processing mechanism and cathodic cleaning processing mechanism, anode cleaning processing mechanism
Including anolyte reserve pool, anolyte reserve pool is internal to be linked with anode compartment by the 3rd connecting tube, and the 3rd
Connecting tube wears and is fixed in the second installing hole, and the 3rd connecting tube is provided with the 3rd peristaltic pump and anolyte purifies absorption
Post, anolyte reserve pool is also by the 5th connecting tube jointed anode room and extend in anode chamber, and the 5th connecting tube sets
There is the 5th peristaltic pump；Cathodic cleaning processing mechanism includes catholyte reserve pool, and catholyte reserve pool is internal by the
Four connecting tubes and cathode chamber internal links, the 4th connecting tube wears and is fixed in the 7th installing hole, and the 4th connecting tube is provided with
4th peristaltic pump and catholyte purify adsorption column, and catholyte reserve pool connects cathode chamber also also by the 6th connecting tube
Extending in cathode chamber, the 6th connecting tube is provided with the 6th peristaltic pump；
PH automaton includes alkali liquor automatic controls and acid solution automatic controls, and alkali liquor automatic controls includes
Alkali liquor reserve pool and anolyte pH analyzer, anolyte pH analyzer is arranged in the 4th installing hole, anode electrolysis
The mensuration end of liquid pH analyzer extends downwardly in anode chamber, and alkali liquor reserve pool is by the first connecting tube through the 5th installing hole also
It extend in anode chamber, the first connecting tube is provided with the first peristaltic pump；Acid solution automatic controls include acid solution reserve pool and
Catholyte pH analyzer, catholyte pH analyzer is arranged in the 9th installing hole, catholyte pH analyzer
Measuring end and extend downwardly in cathode chamber, acid solution reserve pool through the tenth installing hole and extend into cathode chamber by the second connecting tube
In, the second connecting tube is provided with the second peristaltic pump.
Also include the first PLC and the second PLC, DC source by service cable respectively with a PLC
Controller and the second PLC connect；First PLC by control cable respectively with anolyte pH analyzer,
Cathode chamber electrolyte pH analyzer, the first peristaltic pump, the second peristaltic pump, the 3rd peristaltic pump, the 4th peristaltic pump, the 5th peristaltic pump and
6th peristaltic pump connects；Second PLC is connected with linear electric motors, electric pushrod and sampler respectively by controlling cable.
First peristaltic pump, the second peristaltic pump, the 3rd peristaltic pump, the 4th peristaltic pump, the 5th peristaltic pump and the 6th peristaltic pump are equal
For single channel peristaltic pump.
Comprise the following steps:
(1), the collection of sample soil and preparation；
(2), the electro reclamation of sample soil；
(3), the process of electrolyte and renewal；
(4), the heavy metal removing rate of sample soil after analysis electro reclamation.
Described step (1) is particularly as follows: test soil takes from soil at somewhere normal surface 0 ~ 20 cm, the soil that will adopt back
It is put at room ventilation to air-dry to constant weight and levigate sieves that to make its granularity be 1 mm；Again by the certain density cadmium solution of this soil
Mixing, makes the moisture content of the cadmium pollution soil of configuration be about 30%, disappears the cadmium that cooking method records in contaminated soil with chloroazotic acid one perchloric acid
Concentration is about 500 mg/kg.
Described step (2) particularly as follows:
A, cadmium pollution soil is loaded in soil chamber, soil chamber is separated with anode chamber, cathode chamber dividing plate, dividing plate is evenly equipped with
The aperture of 1 cm, and adhere to the filter cloth of one layer of 58 μm；According to test requirements document, the inside dimension of soil chamber is 20 cm × 15 cm
× 10 cm, the inside dimension of electrode chamber is 10 cm × 15 cm × l0 cm, be mounted on above two electrode chambers for
The transverse slat of fixing agitator, each transverse slat all has the aperture of 52 cm, is used for installing graphite electrode, electrolyte pH mensuration
Instrument jack, connection pipeline jack and steam vent；Steam vent is respectively intended to derive hydrogen and the oxygen that yin, yang the two poles of the earth produce；
B, take cadmium pollution soil 3 kg configured and be placed in soil chamber equilibrium 24 h, in cathode chamber, anode chamber, put into electrolysis
Liquid；0.1 mol/L KCl solution；In cathode chamber, anode chamber, insert anode electrode bar and cathode electrode bar respectively, connect straight
Stream power supply, forms the loop of a Guan Bi；Before energising, the second PLC controls sampler and is sampled in soil chamber；
C, sampled after open DC source, carry out electro reclamation experiment, by the first PLC, cathode chamber, sun be set
The pH value of the electrolyte of room, pole maintains the scope of 6 ~ 7, and the pH value of anolyte is come by the NaOH solution of alkali liquor reserve pool
Regulation, the pH value of catholyte is regulated by the acetic acid solution of acid solution reserve pool.
Described step (3) particularly as follows:
(I), process and update, by the 3rd peristaltic pump by defeated for the electrolyte in anode chamber for making the electrolyte in electrode chamber obtain
Delivering to anolyte purify in adsorption column and process, the electrolyte after process returns to anolyte reserve pool and by by the
Five peristaltic pumps are drawn into anode chamber and form circulation；
(II), by being transported to locate in catholyte purifies adsorption column by the electrolyte in cathode chamber with the 4th peristaltic pump
Reason, the electrolyte after process returns to catholyte reserve pool and is drawn into cathode chamber formation circulation by the 6th peristaltic pump, relying on
Repeats itself purifies the electrolyte that just can persistently process and update whole system, it is not necessary to the most additionally add electrolyte.
Described step (4) is particularly as follows: after electro reclamation experiment energising terminates, the second PLC controls sampler and exists
Sampled point originally is resampled, and analyzes the removal efficiency of heavy metal in soil.
Use technique scheme, the method have the advantages that
1, the contaminated soil that the present embodiment is repaired is the cadmium pollution soil of laboratory configuration, and test soil takes from somewhere commonly
Soil at table 0 ~ 20 cm, is put in the soil adopted back at room ventilation to air-dry to constant weight and levigate sieves that to make its granularity be 1
mm；Again this soil is mixed with certain density cadmium solution, make the moisture content of the cadmium pollution soil of configuration be about 30%, with chloroazotic acid one
The perchloric acid cadmium concentration that cooking method records in contaminated soil that disappears is about 500 mg/kg；
2, cadmium pollution soil is loaded in soil chamber, soil chamber is separated with anode chamber, cathode chamber dividing plate, dividing plate is evenly equipped with
The aperture of 1 cm, and adhere to the filter cloth of one layer of 58 μm；According to test requirements document, the inside dimension of soil chamber is 20 cm × 15 cm
× 10 cm, the inside dimension of electrode chamber is 10 cm × 15 cm × l0 cm, be mounted on above two electrode chambers for
The transverse slat of fixing agitator, each transverse slat all has the aperture of 52 cm, is used for installing graphite electrode, electrolyte pH mensuration
Instrument jack, connection pipeline jack and steam vent；Steam vent is respectively intended to derive hydrogen and the oxygen that yin, yang the two poles of the earth produce；
3, take cadmium pollution soil 3 kg configured and be placed in equilibrium 24 h in soil chamber, in cathode chamber, anode chamber, put into electrolysis
Liquid；0.1 mol/L KCl solution；In cathode chamber, anode chamber, insert anode electrode bar and cathode electrode bar respectively, connect straight
Stream power supply, forms the loop of a Guan Bi；Before energising, the second PLC controls sampler and is sampled in soil chamber；
4, open DC source after having sampled, carry out electro reclamation experiment, by the first PLC, cathode chamber, sun are set
The pH value of the electrolyte of room, pole maintains the scope of 6 ~ 7, and the pH value of anolyte is come by the NaOH solution of alkali liquor reserve pool
Regulation, the pH value of catholyte is regulated by the acetic acid solution of acid solution reserve pool；
5, process and update, by the 3rd peristaltic pump, the electrolyte in anode chamber being carried for making the electrolyte in electrode chamber obtain
Processing in purifying adsorption column to anolyte, the electrolyte after process returns to anolyte reserve pool and by by the 5th
Peristaltic pump is drawn into anode chamber and forms circulation；By the electrolyte in cathode chamber being transported to catholyte with the 4th peristaltic pump
Processing in purifying adsorption column, the electrolyte after process returns to catholyte reserve pool and is drawn into the moon by the 6th peristaltic pump
Room, pole forms circulation, relies on repeats itself to purify and just can persistently process and update electrolyte, it is not necessary to the most additionally adds electrolysis
Liquid；
6, after electro reclamation experiment energising terminates, the second PLC controls sampler and is sampled at original sampled point,
Analyze the removal efficiency of heavy metal in soil.
In sum, the present invention is reasonable in design, is mainly used in the heavy metal in-situ immobilization test of contaminated soil, according to dirt
The needs of dye soil realize electro reclamation, can realize the automatic sampling of soil, catholyte, anode electrolysis in repair process
The pH of liquid can automatically control and the subsequent purification of electrolyte processes, the automatic business processing of sample collecting, improves electro reclamation examination
Test automatization and the work efficiency of process.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Reference in Fig. 1 is respectively as follows:
1-linear electric motors, 2-sampler, 3-electric pushrod, 4-DC source, 5-anode chamber, 6-soil chamber, 7-cathode chamber, 8-every
Plate, 9-filter cloth, 10-the first transverse slat, 11-the first installing hole, 12-the second installing hole, 13-the 3rd installing hole, 14-the 4th installs
Hole, 15-the 5th installing hole, 16-the first agitator, 17-anode electrode bar, 18-the second transverse slat, 19-the 6th installing hole, 20 the 7th
Installing hole, 21-the 8th installing hole, 22-the 9th installing hole, 23 the tenth installing holes, 24-the second agitator, 25-cathode electrode bar,
26-anolyte reserve pool, 27-the 3rd connecting tube, 28-the 3rd peristaltic pump, 29-anolyte purifies adsorption column, 30-the
Five connecting tubes, 31-the 5th peristaltic pump, 32-catholyte reserve pool, 33-the 4th connecting tube, 34-the 4th peristaltic pump, 35-is cloudy
Pole electrolyte purification adsorption column, 36-the 6th connecting tube, 37-the 6th peristaltic pump, 38-alkali liquor reserve pool, 39-anolyte pH
Analyzer, 40-the first connecting tube, 41-the first peristaltic pump, 42-acid solution reserve pool, 43-catholyte pH analyzer, 44-
Two connecting tubes, 45-the second peristaltic pump, 46-the first PLC, 47-the second PLC.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail:
As it is shown in figure 1, a kind of heavy metal-polluted soil electro reclamation experimental system, at electro reclamation chamber device, electrolyte purification
Reason device, pH automaton and soil automatic sampling apparatus.
Soil automatic sampling apparatus includes linear electric motors 1 and sampler 2, and the mover of linear electric motors 1 is provided with to dividing into
The electric pushrod 3 put, sampler 2 is arranged on electric pushrod 3 bottom.
Electro reclamation chamber device includes DC source 4 and experimental box, is provided with two pieces of dividing plates in experimental box, and two pieces of dividing plates will examination
Tryoff is divided into anode chamber 5, soil chamber 6 and cathode chamber 7 the most successively, two pieces of dividing plates 8 uniformly offers diameter and is more than
Or the hole equal to 1cm, a side surface upper berth of two pieces of dividing plates 8 is provided with filter cloth 9, and the slide rail of linear electric motors 1 is horizontally arranged at soil
Between the inwall on top, room 6, the working end of sampler 2 is towards soil chamber 6；Between the upper inside wall of anode chamber 5, level is provided with
One transverse slat 10, the first transverse slat 10 be sequentially provided with from left to right first installing hole the 11, second installing hole 12, the 3rd installing hole 13,
Four installing hole 14 and the 5th installing holes 15, the first installing hole 11 is provided with the first down-set agitator 16, the 3rd installing hole
13 are provided with down-set anode electrode bar 17；Between the upper inside wall of cathode chamber 7, level is provided with the second transverse slat 18, and second is horizontal
Plate 18 right-to-left is sequentially provided with the 6th installing hole the 19, the 7th installing hole the 20, the 8th installing hole the 21, the 9th installing hole 22 and the tenth
Installing hole 23, the 6th installing hole 19 is provided with the second down-set agitator 24, and the 8th installing hole 21 is provided with down-set
Cathode electrode bar 25；DC source 4 connects first agitator the 16, second agitator 24, anode electricity by service cable respectively
Pole bar 17 and cathode electrode bar 25；Air-vent is all offered on first transverse slat 10 and the second transverse slat 18.
Electrolyte purification processing means includes anode cleaning processing mechanism and cathodic cleaning processing mechanism, and anode cleaning processes
Mechanism includes anolyte reserve pool 26, and anolyte reserve pool 26 is internal by the 3rd connecting tube 27 and anode chamber 5
Portion links, and the 3rd connecting tube 27 wears and be fixed in the second installing hole 12, and the 3rd connecting tube 27 is provided with the 3rd peristaltic pump 28
Purifying adsorption column 29 with anolyte, anolyte reserve pool 26 is also by the 5th connecting tube 30 jointed anode room 5 and stretches
Entering in anode chamber 5, the 5th connecting tube 30 is provided with the 5th peristaltic pump 31；Cathodic cleaning processing mechanism includes that catholyte stores up
Standby pond 32, catholyte reserve pool 32 is internal to be worn in cathode chamber 7 internal links, the 4th connecting tube 33 by the 4th connecting tube 33
And if be fixed in the 7th installing hole 20, the 4th connecting tube 33 is provided with the 4th peristaltic pump 34 and catholyte and purifies adsorption column
35, catholyte reserve pool 32 connects cathode chamber 7 also by the 6th connecting tube 36 and extend in cathode chamber 7, and the 6th connects
Pipe 36 is provided with the 6th peristaltic pump 37.
PH automaton includes alkali liquor automatic controls and acid solution automatic controls, alkali liquor automatic controls
Including alkali liquor reserve pool 38 and anolyte pH analyzer 39, anolyte pH analyzer 39 is arranged on the 4th installing hole 14
In, the mensuration end of anolyte pH analyzer 39 extends downwardly in anode chamber 5, and alkali liquor reserve pool 38 is by the first connecting tube
40 through the 5th installing hole 15 and extend in anode chamber 5, and the first connecting tube 40 is provided with the first peristaltic pump 41；Acid solution is automatic
Controlling organization includes acid solution reserve pool 42 and catholyte pH analyzer 43, and catholyte pH analyzer 43 is arranged on the 9th
In installing hole 22, the mensuration end of catholyte pH analyzer 43 extends downwardly in cathode chamber 7, and acid solution reserve pool 42 is by the
Two connecting tubes 44 through the tenth installing hole 23 and extend in cathode chamber 7, and the second connecting tube 44 is provided with the second peristaltic pump 45.
Also include the first PLC 46 and the second PLC 47, DC source 4 by service cable respectively with the
One PLC 46 and the second PLC 47 connect；First PLC 46 by control cable respectively with anode electrolysis
Liquid pH analyzer 39, catholyte pH analyzer the 43, first peristaltic pump the 41, second peristaltic pump the 45, the 3rd peristaltic pump the 28, the 4th
Peristaltic pump the 34, the 5th peristaltic pump 31 and the 6th peristaltic pump 37 connect；Second PLC 47 by control cable respectively with straight line
Motor 1, electric pushrod 3 and sampler 2 connect.
First peristaltic pump the 41, second peristaltic pump 45, the 3rd peristaltic pump 28, the 4th peristaltic pump 34, the 5th peristaltic pump 31 and
Six peristaltic pumps 37 are single channel peristaltic pump.
Test soil takes from soil at somewhere normal surface 0 ~ 20 cm, is put at room ventilation by the soil adopted back and air-dries
Levigate to constant weight sieve that to make its granularity be 1 mm；Being mixed with certain density cadmium solution by this soil, the cadmium making configuration is dirty again
The moisture content of dye soil is about 30%, is about 500 mg/ with the chloroazotic acid one perchloric acid cadmium concentration that cooking method records in contaminated soil that disappears
kg。
Cadmium pollution soil is loaded in soil chamber 6, soil chamber 6 is separated with anode chamber 5, cathode chamber 7 dividing plate 8, dividing plate 8
On be evenly equipped with the aperture of 1 cm, and adhere to the filter cloth 9 of one layer of 58 μm；According to test requirements document, the inside dimension of soil chamber 6 is 20
Cm × 10, cm × 15 cm, the inside dimension of electrode chamber is 10 cm × 15 cm × l0 cm, above two electrode chambers all
The transverse slat being used for fixing agitator is installed, each transverse slat all has the aperture of 52 cm, be used for graphite electrode, electricity are installed
Solve liquid pH analyzer jack, connect pipeline jack and steam vent；Steam vent is respectively intended to derive the hydrogen that yin, yang the two poles of the earth produce
And oxygen.
Take equilibrium in cadmium pollution soil 3 kg configured is placed in soil chamber 6 and place 24 h, in cathode chamber 7, anode chamber 5
Put into electrolyte 0.1 mol/L KCl solution；Anode electrode bar 17 and negative electrode electricity is inserted respectively in cathode chamber 7, anode chamber 5
Pole bar 25, connects DC source 4, forms the loop of a Guan Bi；Before energising, the second PLC 47 controls sampler 2 at soil
It is sampled in earth room 6.
Open DC source 4 after having sampled, carry out electro reclamation experiment, negative electrode is set by the first PLC 46
Room 7, the pH value of electrolyte of anode chamber 5 maintain the scope of 6 ~ 7, and the pH value of anolyte is by alkali liquor reserve pool 38
NaOH solution regulates, and the pH value of catholyte is regulated by the acetic acid solution of acid solution reserve pool 42.
Process for making the electrolyte in electrode chamber obtain and update, by the 3rd peristaltic pump 28 by the electrolysis in anode chamber 5
Liquid is transported to process in anolyte purifies adsorption column 29, and the electrolyte after process returns to anolyte reserve pool 26
And formed circulation by being drawn into anode chamber 5 by the 5th peristaltic pump 31；By with the 4th peristaltic pump 34 by the electrolyte in cathode chamber 7
Being transported to process in catholyte purifies adsorption column 35, the electrolyte after process returns to catholyte reserve pool 32 also
It is drawn into cathode chamber 7 by the 6th peristaltic pump 37 and forms circulation, rely on repeats itself to purify and just can persistently process and update electrolysis
Liquid, it is not necessary to the most additionally add electrolyte.
After electro reclamation experiment energising terminates, the second PLC 47 controls sampler 2 and carries out at original sampled point
Sampling, analyzes the removal efficiency of heavy metal in soil.
The shape of the present invention, material, structure etc. are not made any pro forma restriction by the present embodiment, every according to this
Any simple modification, equivalent variations and the modification that above example is made by bright technical spirit, belongs to the technology of the present invention side
The protection domain of case.
Claims (8)
1. a heavy metal-polluted soil electro reclamation experimental system, it is characterised in that: include electro reclamation chamber device, electrolyte purification
Processing means, pH automaton and soil automatic sampling apparatus；
Soil automatic sampling apparatus includes linear electric motors and sampler, the mover of linear electric motors is provided with down-set electronic
Push rod, sampler is arranged on electric pushrod bottom；
Electro reclamation chamber device includes DC source and experimental box, is provided with two pieces of dividing plates in experimental box, and two pieces of dividing plates are by proof box
It is divided into anode chamber, soil chamber and cathode chamber the most successively, dividing plate uniformly offers diameter more than or equal to 1cm's
Hole, a side surface upper berth of dividing plate is provided with filter cloth, and the slide rail of linear electric motors is horizontally arranged at the upper inside wall of soil chamber, sampler
Working end towards soil chamber；The upper inside wall level of anode chamber is provided with the first transverse slat, and the first transverse slat is sequentially provided with from left to right
First installing hole, the second installing hole, the 3rd installing hole, the 4th installing hole and the 5th installing hole, the first installing hole is provided with downwards
The first agitator arranged, the 3rd installing hole is provided with down-set anode electrode bar；The upper inside wall level of cathode chamber sets
The second transverse slat, the second transverse slat right-to-left is had to be sequentially provided with the 6th installing hole, the 7th installing hole, the 8th installing hole, the 9th installation
Hole and the tenth installing hole, the 6th installing hole is provided with the second down-set agitator, and the 8th installing hole is provided with down-set
Cathode electrode bar；DC source connects the first agitator, the second agitator, anode electrode bar and the moon by service cable respectively
Pole electrode stem；Air-vent is all offered on first transverse slat and the second transverse slat；
Electrolyte purification processing means includes anode cleaning processing mechanism and cathodic cleaning processing mechanism, anode cleaning processing mechanism
Including anolyte reserve pool, anolyte reserve pool is internal to be linked with anode compartment by the 3rd connecting tube, and the 3rd
Connecting tube wears and is fixed in the second installing hole, and the 3rd connecting tube is provided with the 3rd peristaltic pump and anolyte purifies absorption
Post, anolyte reserve pool is also by the 5th connecting tube jointed anode room and extend in anode chamber, and the 5th connecting tube sets
There is the 5th peristaltic pump；Cathodic cleaning processing mechanism includes catholyte reserve pool, and catholyte reserve pool is internal by the
Four connecting tubes and cathode chamber internal links, the 4th connecting tube wears and is fixed in the 7th installing hole, and the 4th connecting tube is provided with
4th peristaltic pump and catholyte purify adsorption column, and catholyte reserve pool connects cathode chamber also also by the 6th connecting tube
Extending in cathode chamber, the 6th connecting tube is provided with the 6th peristaltic pump；
PH automaton includes alkali liquor automatic controls and acid solution automatic controls, and alkali liquor automatic controls includes
Alkali liquor reserve pool and anolyte pH analyzer, anolyte pH analyzer is arranged in the 4th installing hole, anode electrolysis
The mensuration end of liquid pH analyzer extends downwardly in anode chamber, and alkali liquor reserve pool is by the first connecting tube through the 5th installing hole also
It extend in anode chamber, the first connecting tube is provided with the first peristaltic pump；Acid solution automatic controls include acid solution reserve pool and
Catholyte pH analyzer, catholyte pH analyzer is arranged in the 9th installing hole, catholyte pH analyzer
Measuring end and extend downwardly in cathode chamber, acid solution reserve pool through the tenth installing hole and extend into cathode chamber by the second connecting tube
In, the second connecting tube is provided with the second peristaltic pump.
A kind of heavy metal-polluted soil electro reclamation experimental system the most according to claim 1, it is characterised in that: also include first
PLC and the second PLC, DC source is controlled with the first PLC and the 2nd PLC respectively by service cable
Device connects；First PLC measures with anolyte pH analyzer, cathode chamber electrolyte pH respectively by controlling cable
Instrument, the first peristaltic pump, the second peristaltic pump, the 3rd peristaltic pump, the 4th peristaltic pump, the 5th peristaltic pump and the 6th peristaltic pump connect；The
Two PLC are connected with linear electric motors, electric pushrod and sampler respectively by controlling cable.
A kind of heavy metal-polluted soil electro reclamation experimental system the most according to claim 1, it is characterised in that: first wriggles
Pump, the second peristaltic pump, the 3rd peristaltic pump, the 4th peristaltic pump, the 5th peristaltic pump and the 6th peristaltic pump are single channel peristaltic pump.
The experimental technique of a kind of heavy metal-polluted soil electro reclamation experimental system the most according to claim 1, it is characterised in that:
Comprise the following steps:
(1), the collection of sample soil and preparation；
(2), the electro reclamation of sample soil；
(3), the process of electrolyte and renewal；
(4), the heavy metal removing rate of sample soil after analysis electro reclamation.
A kind of heavy metal-polluted soil electro reclamation experimental technique the most according to claim 4, it is characterised in that: described step
(1) particularly as follows: test soil takes from soil at somewhere normal surface 0 ~ 20 cm, the soil adopted back is put in wind at room ventilation
Do to constant weight and levigate sieve that to make its granularity be 1 mm；Again this soil is mixed with certain density cadmium solution, make the cadmium of configuration
The moisture content of contaminated soil is about 30%, is about 500 mg/ with the chloroazotic acid one perchloric acid cadmium concentration that cooking method records in contaminated soil that disappears
kg。
A kind of heavy metal-polluted soil electro reclamation experimental technique the most according to claim 4, it is characterised in that: described step
(2) particularly as follows:
A, cadmium pollution soil is loaded in soil chamber, soil chamber is separated with anode chamber, cathode chamber dividing plate, dividing plate is evenly equipped with
The aperture of 1 cm, and adhere to the filter cloth of one layer of 58 μm；According to test requirements document, the inside dimension of soil chamber is 20 cm × 15 cm
× 10 cm, the inside dimension of electrode chamber is 10 cm × 15 cm × l0 cm, be mounted on above two electrode chambers for
The transverse slat of fixing agitator, each transverse slat all has the aperture of 52 cm, is used for installing graphite electrode, electrolyte pH mensuration
Instrument jack, connection pipeline jack and steam vent；Steam vent is respectively intended to derive hydrogen and the oxygen that yin, yang the two poles of the earth produce；
B, take cadmium pollution soil 3 kg configured and be placed in soil chamber equilibrium 24 h, in cathode chamber, anode chamber, put into electrolysis
Liquid；0.1 mol/L KCl solution；In cathode chamber, anode chamber, insert anode electrode bar and cathode electrode bar respectively, connect straight
Stream power supply, forms the loop of a Guan Bi；Before energising, the second PLC controls sampler and is sampled in soil chamber；
C, sampled after open DC source, carry out electro reclamation experiment, by the first PLC, cathode chamber, sun be set
The pH value of the electrolyte of room, pole maintains the scope of 6 ~ 7, and the pH value of anolyte is come by the NaOH solution of alkali liquor reserve pool
Regulation, the pH value of catholyte is regulated by the acetic acid solution of acid solution reserve pool.
A kind of heavy metal-polluted soil electro reclamation experimental technique the most according to claim 4, it is characterised in that: described step
(3) particularly as follows:
(I), process and update, by the 3rd peristaltic pump by defeated for the electrolyte in anode chamber for making the electrolyte in electrode chamber obtain
Delivering to anolyte purify in adsorption column and process, the electrolyte after process returns to anolyte reserve pool and by by the
Five peristaltic pumps are drawn into anode chamber and form circulation；
(II), by being transported to locate in catholyte purifies adsorption column by the electrolyte in cathode chamber with the 4th peristaltic pump
Reason, the electrolyte after process returns to catholyte reserve pool and is drawn into cathode chamber formation circulation by the 6th peristaltic pump, relying on
Repeats itself purifies the electrolyte that just can persistently process and update whole system, it is not necessary to the most additionally add electrolyte.
A kind of heavy metal-polluted soil electro reclamation experimental technique the most according to claim 4, it is characterised in that: described step
(4) particularly as follows: after electro reclamation experiment energising terminates, the second PLC controls sampler and carries out at original sampled point
Resample, analyze the removal efficiency of heavy metal in soil.
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| CN110434166A (en) * | 2019-08-13 | 2019-11-12 | 长江水利委员会长江科学院 | The bicyclic vertical self-cleaning type dehydrated in situ of one kind subtracts dirty electro reclamation device and method |
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| CN110479757A (en) * | 2019-09-02 | 2019-11-22 | 河南工程学院 | A kind of the electro reclamation device and restorative procedure of Compound Heavy Metals soil |
| CN112170476A (en) * | 2020-09-15 | 2021-01-05 | 河北工业大学 | Magnetizing electrokinetic remediation device and remediation method for heavy metal contaminated soil |
| CN114378111A (en) * | 2021-11-30 | 2022-04-22 | 西安建筑科技大学 | Device and method for removing loess heavy metal pollution based on electrodynamics and mineralogy |
| CN114472495A (en) * | 2022-01-21 | 2022-05-13 | 西安建筑科技大学 | Device and method for electrokinetic remediation of polluted soil by combining chelating agent and permeable reactive barrier |
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Application publication date: 20161026 |