CN106424107A - Device of leaching and electrokinetically remediating chromium slag stacking place by nanometer zero-valent iron and nickel - Google Patents
Device of leaching and electrokinetically remediating chromium slag stacking place by nanometer zero-valent iron and nickel Download PDFInfo
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- CN106424107A CN106424107A CN201610897451.9A CN201610897451A CN106424107A CN 106424107 A CN106424107 A CN 106424107A CN 201610897451 A CN201610897451 A CN 201610897451A CN 106424107 A CN106424107 A CN 106424107A
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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
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a device of leaching and electrokinetically remediating a chromium slag stacking place by nanometer zero-valent iron and nickel. The device comprises an electrokinetic remediation device and a leaching system; the electrokinetic remediation device is arranged on the upper end surface of a soil chamber between a cathode chamber and an anode chamber and is provided with eluent nozzles of the leaching system to carry out spraying on the soil chamber through the eluent nozzles, thus automatic continuous remediation of heavy metal contaminated soil is realized. According to the device, by utilizing the electrokinetics and a nanometer zero-valent iron-nickel double metal eluent to commonly remediate the soil, the remediation time of the soil is effectively shortened, and the remediation efficiency of the soil is improved.
Description
Technical field
The present invention relates to a kind of chromium slag muck puts the prosthetic device of ground contamination soil, specifically a kind of iron salt is as catholyte
Liquid, nanometer Fe/Ni bimetallic as leacheate, electrokinetic technique is combined in elution technique together with reparation chromium slag contaminated soil
Device.
Background technology
China is chromium salt production big country of the world, and annual production is more than 160,000 tons, but produces a large amount of in its production process
Chromium residue.About 600,000 tons of chromium slag is newly discharged in the whole nation every year, and accumulation heap over the years leaves with nearly 4,000,000 tons of chromium slag.0.3 is contained in chromium slag
～1.5% solubility Cr (VI), through washing away of rainfall and surface water, Cr (VI) enters surrounding soil and subsoil water, environment is made
Become severe contamination, current China is reached more than 1,250 ten thousand tons by the soil of Cr (VI) severe contamination.Cr VI dissolubility in the solution
Ratio is larger, thus toxicity is also just very strong, is the second largest heavy metal contaminants in soil environment, is only second to lead；Cr VI is permissible
By modes such as suction, picked-up or skin contacts, human body is produced and poison, cause a series of disease such as edema, skin ulcer, pulmonary carcinoma
Become.In pollution of chromium place, content of 6-valence Cr ions is very high, and easily produces diffusion, is a great potential threat to surrounding enviroment,
As very big by endangering in dealt with improperly.China started from 1958 to build chromium salt factory, and it is densely populated that a lot of chromium salt factory are distributed in some
Area, as Guangzhou, Shanghai, Suzhou, Tianjin, Shenyang, Chongqing etc..In the production process of more than 50 years, create substantial amounts of chromium
Slag, account for substantial amounts of accumulation place, through rainwater shower, the infiltration of decades, is not only chromium slag itself, grid periphery by
Contaminated soil has also become polluter, causes the pollution of soil environment and water environment.Chromium slag muck is put field and is had been classified as China's soil
Pollution keypoint treatment object, is badly in need of repairing the key technology of chromium slag contaminated soil at present.
Technology of Electrodynamics Renovation can effectively remove the organic and inorganic pollution in soil, compares traditional soil
Recovery technique has the advantages that low cost, simple to operate, contact harmful toxic matter is few, does not easily cause secondary pollution, in recent years in state
Inside and outside development more and more faster.The principle of technology of Electrodynamics Renovation is to add low-voltage direct electric field, profit at contaminated soil two ends
The electrokinesises such as the electrodialysis, electromigration and the electrophoresis that are produced with electric field, make dirt water-soluble or that absorption is on soil particle top layer
Dye thing according to each charged difference and move to different electrode direction, and thing is enriched in electrode district and is focused on
Or separate.Wherein electrodialysis are the pore water direction flowings from cathode to anode under electric field action in soil；Electromigration is band
The contrary electrode direction migration of electron ion galvanotropism；Electrophoresis is the travel motion of charged colloidal particles in soil.
Soil chemistry elution technique principle is to act on the heavy metal in solid phase of soil with reagent, is formed deliquescent heavy
Metal ion or metal complex, are then rushed pollutant to outside root layer with clear water, recycle the chemical combination containing certain ligand
Thing shower soil, is allowed to form more stable complex with heavy metal ion；Or with the solution with anion, such as carbonate,
Phosphate rinses soil, makes heavy metal form compound precipitation.Drip washing have can remove a large amount of pollutant, limit pollution thing expand
Dissipate, spend less, simple operation and other advantages.The key problem in technology of the method is to find a kind of huge sum of money that can extract various forms
Belong to, and do not destroy the eluent device of Soil structure.
Nano zero valence iron refers to zero-valent iron particle in the range of 1-100 nm for the particle diameter, has specific surface area greatly, reproducibility
Strong the features such as.Because the specific surface area of its granule and surface energy are larger, thus having superior absorption property and very high reduction
Activity；Its distinctive skin effect and small-size effect, can improve reactivity and the treatment effeciency of Zero-valent Iron.Research shows
Nano zero valence iron can effectively remove the heavy metals such as Zn, Cr, Cu, Pb, Ag.Nano zero valence iron is in the reaction with heavy metal contaminants
In show higher activity, can be by changing the ionic valence condition of toxic metals or adsorption, thus reducing its toxicity.
There is viewpoint to think, there are 3 kinds of reducing agents in zero-valent metal ferrum system：Metallic iron (F0）, ferrous ion (Fe2+) and hydrogen
(H2).Nano zero-valence ferroalloy powder has many special physics, chemical property, wherein ferrum nickel due to quantum size effect
Alloy is a kind of material of traditional optimal stability.
Content of the invention
For pollution of chromium in effective rehabilitating soil, the present invention provides a kind of nano zero valence iron nickel drip washing electromotion repairing technique
Chromium slag muck puts the device on ground.
Realize the concrete technical scheme that said apparatus are taken as follows.
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device of place soil, including electro reclamation dress
Put and elution circuit；It is characterized in that：Described electro reclamation device includes cathode chamber, anode chamber and soil chamber, and in soil
The upper surface of device is provided with the leacheate shower nozzle of elution circuit, by leacheate shower nozzle, soil chamber is sprayed；In soil
The lower section of room is provided with a track or conveyer belt is used for separating soil chamber, realizes putting the continuously automatically controlled of place soil to chromium slag muck
Repair；
Described electro reclamation device is that anode pH control room passes through anode pH probe induced electrolyte pH, by anode pump control line
Control anode pump to pump into anolyte, carry out the regulation of electrolyte ph；Negative electrode grug feeding jar and negative electrode pH control room pass through the moon
Pole pH probe induced electrolyte ph, controls line traffic control negative electrode pump to pump into catholyte by negative electrode pump, carries out electrolyte pH
Regulation；Anode chamber, soil chamber, cathode chamber, cathode electrode and anode electrode, are separated by the subsidiary filter paper of hole dividing plate respectively,
And pass freely through liquid and ion；Cationic membrane stops the OH that negative electrode produces-Enter soil chamber；Catholyte overfall overflows
Alkaline solution discharge after treatment；By filter cloth and quartz sand filtration leacheate；Electrolysis unit also includes：Aeration tube, negative electrode
Electrolyte overfall, anolyte feed tube, anode chemical feed pipe, negative electrode chemical feed pipe, external power supply, spoil disposal pipeline, sludge pump
With the anode chamber and the cathode chamber base；
Described elution circuit is by the nano zero valence iron nickel bimetal suspension of leacheate storage chamber and sour circulation fluid reserve room
Acid solution, is sprayed in soil through leacheate shower nozzle and acid solution shower nozzle respectively；Described leacheate shower nozzle is to be uniformly arranged on soil chamber
Top；Described acid solution shower nozzle is to be uniformly arranged on above negative electrode soil, and described acid solution is to pass through to carry by anode spillage
Liter pump is collected in sour fluid reservoir and is reused.
According to the device described in technique scheme, the electrolyte of described cathode chamber is the iron salt of 0.02-10mol/L；Institute
The electrolyte stating anode chamber is the citric acid-sodium citrate buffer solution of pH value 2-6；The leacheate of described leacheate storage chamber is
The nanometer Fe of 0.05-10g/L/Ni bimetallic suspension；Described iron salt is Fe2(SO4)3、Fe(NO3)3And FeCl3One of；
Described electrode is graphite electrode；Described voltage is 5-50V；The described repair time repairing chromium slag is 36-300 hour；Described the moon
The volumetric ratio of pole room, anode chamber and soil chamber is 3: 3：5-50.
According to the device described in technique scheme, described nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts ground
The restorative procedure of device be to be realized by elution circuit drip washing and electromotion repairing technique, concrete grammar is as follows：
（1）Heavy-metal contaminated soil is placed in soil chamber, and adds activated carbon fiber to activated carbon fiber room, then by cation
Film is attached to and is wrapped up by filter paper on hole dividing plate；
（2）Negative electrode pH control room and anode pH control room are passed through pH probe induced electrolyte ph, controls negative electrode pump and anode
Pump pumps into catholyte and anolyte, and the pH of electrolyte is adjusted control；
（3）Nanometer Fe/Ni bimetallic the suspension of 0.05-10 g/L is added in leacheate storage chamber, equal by leacheate shower nozzle
Even being sprayed in contaminated soil carries out drip washing；
（4）Repair process Anodic acidic electrolysis spillage, pumps into sour circulation fluid deposit by catholyte spillage elevator pump
Room, instills the soil near negative electrode through acid solution shower nozzle, adjusts its soil pH；Negative electrode alkaline electrolysises spillage passes through to process heel row
Go out；
（5）The heavy metal precipitation thing that negative electrode generates is discharged through discharge pipeline, recycles after treatment；
（6）The filter cloth through soil chamber bottom for the leacheate and quartz sand are discharged, and discharge after being collected processing.
Wherein, described drip washing is overflow the nano zero valence iron nickel bimetal suspension of leacheate storage chamber and using catholyte
Go out the acid solution that liquid elevator pump is stored in sour circulation fluid reserve room, be sprayed in soil through leacheate shower nozzle and acid solution shower nozzle respectively,
Realize the reparation of heavy metal contaminated soil.
Compared with prior art, above-mentioned the provided a kind of nano zero valence iron nickel drip washing electromotion repairing technique of the present invention
Chromium slag muck puts the device on ground, is had the advantage that as follows with good effect.
This device is combined with nano zero valence iron nickel bimetal leacheate as the electrodynamics of catholyte using iron salt
Restoration of soil polluted by heavy metal, prevents the OH that negative electrode produces effectively-Enter soil, shorten repair time simultaneously, improve
Remediation efficiency.
This device is provided with pH induction meter, the changing value of real-time monitoring the anode chamber and the cathode chamber electrolyte pH in the anode chamber and the cathode chamber, works as pH
During beyond certain limit, anode and cathode pH control room is adjusted and controlled by pump and pumps into electrolyte liquid, keeps at anode and cathode electrolyte pH
In proper range, improve electrolysis remediation efficiency.
This device is stripped of chromium effectively using the extremely strong reproducibility of nano zero valence iron nickel bimetal leacheate and adsorptivity
Pollutant.
This device is provided with a track or conveyer belt in the lower section of soil chamber, for the anode chamber and the cathode chamber and soil chamber point
From to realize the continuous processing of contaminated soil.
Brief description
Fig. 1 is the overall structure diagram of this device.
Fig. 2 is the anode cell configuration schematic diagram of Fig. 1 of the present invention.
Fig. 3 is the soil chamber side structure schematic diagram of Fig. 1 of the present invention.
Fig. 4 is the cathode chamber structural representation of Fig. 1 of the present invention.
Fig. 5 is the leacheate shower nozzle distributed architecture schematic diagram of Fig. 1 of the present invention.
In figure：1：Anode pH control room；2：Anode grug feeding jar；3：Leacheate storage chamber；4：Sour circulation fluid reserve room；5：Negative electrode
Grug feeding jar；6：Negative electrode pH control room；7：Anode chamber；8：Soil chamber；10：Cationic membrane；11：Cathode chamber；12：Cathode electrode；13：
Negative electrode pH probe；14：The subsidiary filter paper of hole dividing plate；15：Catholyte overfall；16：Catholyte feed tube；17：Cloudy
Pole pump；19：Filter cloth；20：Quartz sand；21：Acid solution shower nozzle；22：Leacheate shower nozzle；23：Acid solution pipe；24：Anode pH probe；25：
Anode electrode；26：Aeration tube；27：Catholyte spillage elevator pump；28：Catholyte overfall；29：Anode pump；30：
Anolyte feed tube；31：Anode chemical feed pipe；32：Negative electrode chemical feed pipe；33：External power supply；34：Discharge pipeline；35：Sludge pump；
36：The anode chamber and the cathode chamber base；37：Anode pump control line；38：Negative electrode pump control line；39：Anolyte spillage riser；40：
Anode chamber；41：Cathode chamber；42：Interface in anode chamber；43：Anode chamber's lower interface；44：Interface in soil chamber；45：Under soil chamber
Interface；46：Interface on cathode chamber；47：Cathode chamber lower interface.
Specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further illustrated.
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck that implementing the invention described above is provided puts the dress on ground
Put, this device includes electro reclamation device and elution circuit；Its composition is：Described electro reclamation device is in cathode chamber 11
With soil chamber 8 upper surface in the middle of anode chamber 7, and it is provided with the leacheate shower nozzle 22 of elution circuit in soil chamber 8 upper surface, lead to
Cross leacheate shower nozzle 22 soil chamber 8 is sprayed；The lower section of soil chamber 8 is provided with a track or conveyer belt is used for soil
The separation of room 8, to realize chromium slag muck is put with the continuous repair of place soil；
A kind of enforcement of elution circuit, including the leacheate storage chamber 3 of storage nano Zero-valent Iron nickel bimetal suspension；Using negative electrode
Acid solution is stored in sour circulation fluid reserve room 4 by electrolysis spillage elevator pump 27；Spray through acid solution shower nozzle 21 and leacheate shower nozzle 22
It is spilled in soil；Wherein, leacheate spray 22 is evenly arranged in above soil；Acid solution shower nozzle 21 is evenly arranged in the soil near negative electrode
Above earth；Anode spillage is collected in sour fluid reservoir, reuses.
A kind of enforcement of Electroremediation device, senses electrolyte including anode pH control room 1 by anode pH probe 24
PH, controls anode pump 29 to pump into anolyte and adjust pH by anode pump control line 37；Anode grug feeding jar 2；Negative electrode grug feeding jar
5；Negative electrode pH control room 6 senses electrolyte pH by negative electrode pH probe 13, controls negative electrode pump 17 to pump into by negative electrode pump control line 38
Catholyte simultaneously adjusts pH；Anode chamber 7, soil chamber 8, cationic membrane 10 stop the OH- that negative electrode produces from entering soil；Cathode chamber
11；For cathode electrode 12 and anode electrode 25；The subsidiary filter paper 14 of hole dividing plate, fixing soil, liquid and ion can pass freely through；
The alkaline solution qualified discharge after treatment that catholyte overfall 15 overflows；Catholyte enters pipeline 16；Filter cloth 19 He
Quartz sand 20, can filter leacheate；Aeration tube 26 can play stirring action；Catholyte overfall 28；Anode electrolysis
Liquid feed tube 30；Anode chemical feed pipe 31；Negative electrode chemical feed pipe 32；External power supply 33；Discharge pipeline 34, the precipitate that negative electrode is produced is arranged
Remove；Sludge pump 35；The anode chamber and the cathode chamber base 36.
In above-mentioned implementation, the electrolyte of cathode chamber 11 is the iron salt of 0.02-10mol/L；The electrolysis of anode chamber 7
Liquid is the citric acid-sodium citrate buffer solution that pH value is 2-6；Leacheate is that the nanometer Fe/Ni bimetallic of 0.05-10g/L suspends
Liquid；Iron salt is Fe2(SO4)3、Fe(NO3)3Or FeCl3；Electrode is graphite electrode；Cathode chamber 11, anode chamber 7 and soil chamber 8
Volumetric ratio be 3: 3：5-50；Voltage is 5-50V, is 36-300 hour to chromium slag contaminated soil remediation.
Using the present invention above-mentioned implemented nano zero valence iron nickel drip washing electromotion repairing technique device, chromium slag muck is put with ground
The method and step that chromium slag contaminated soil is repaired is as follows.
（1）The soil chamber 8 of contaminated soil will be loaded by interface 42, cathode chamber in interface 44 in soil chamber and anode chamber
Upper interface 46 connects；Soil chamber lower interface 45 and anode chamber's lower interface 43, cathode chamber lower interface 47 connect, soil chamber 8 two sides
It is provided with the space dividing plate of attachment filter paper, realize continuous processing contaminated soil.
（2）Pump into electrolyte to cathode chamber 11 and anode chamber 7 respectively, negative electrode is iron nitrate solution, and anode is citric acid, lemon
The organic acid such as lemon acid-sodium citrate.
（3）The nano zero valence iron nickel bimetal suspension adding preparation, in leacheate storage chamber 3, is provided with stirring dress
Put.
（4）After electrolysis, anode acidic electrolysis bath is stored in acid circulation storage chamber 4, adjusts near negative electrode as sour leacheate
Soil pH.
（5）According to soil pollutant not in the same direction the anode chamber and the cathode chamber add different chemical reagent and increase removal effect, will change
Learn reagent to pump in anode grug feeding jar 2 and negative electrode grug feeding jar 5.
（6）Pass through and negative electrode pH probe 13 and anode pH probe 24 in electrolytic process, detection anode chamber 7 and cathode chamber 11
Electrolyte pH, passes to anode pH control room 1 and negative electrode pH control room 6 controls negative electrode pump 17 and anode pump 29 to pump into buffer and adjust
Electrolyte pH.
（7）Leacheate flows through filter cloth and quartz sand oozes out, and processes rear discharge up to standard, catholyte spillage, reaches after process
Mark discharge.
（8）The precipitate that negative electrode generates is discharged by sludge pump 35.
Using a kind of above-mentioned the implemented nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck of the present invention put ground device and
Its restorative procedure, is further illustrated by following concrete restorative procedure example.
Embodiment 1
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, and negative electrode and anode are graphite cake
Electrode, and be connected with the negative pole of power supply, positive pole respectively；Yin, yang pole room is 1 with the volumetric ratio of soil chamber：3；Take from chromium slag muck
Put place soil, its chromium concn is 150 mg/kg；Voltage is 30 V, and anolyte is that the citric acid-sodium citrate of pH=3 is delayed
Rush liquid, negative electrode is the FeCl of 3 mol/L3Solution, eluent concentration is 3 g/L, and experimental period is 144 h, using NITRATE BY FLAME ATOMIC
Absorb and send out the content of beary metal measuring in soil sample；The clearance of chromium is：85.6%.
Embodiment 2
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, and negative electrode and anode are graphite cake
Electrode, and be connected with the negative pole of power supply, positive pole respectively；Yin, yang pole room is 1 with the volumetric ratio of soil chamber：3；Take from chromium slag muck
Put place soil, its chromium concn is 150 mg/kg；Voltage is 30 V, and anolyte is that the citric acid-sodium citrate of pH=3 is delayed
Rush liquid, negative electrode is the FeCl of 5 mol/L3Solution, eluent concentration is 3 g/L, and experimental period is 144h, is inhaled using NITRATE BY FLAME ATOMIC
Transmitting-receiving measures the content of beary metal in soil sample；The clearance of chromium is：86.7%.
Embodiment 3
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, and negative electrode and anode are graphite cake
Electrode, and be connected with the negative pole of power supply, positive pole respectively；Yin, yang pole room is 1 with the volumetric ratio of soil chamber：3；Take from chromium slag muck
Put place soil, its chromium concn is 150 mg/kg；Voltage is 30 V, and anolyte is that the citric acid-sodium citrate of pH=3 is delayed
Rush liquid, negative electrode is the Fe of 3 mol/L2(SO4)3Solution, eluent concentration is 3 g/L, and experimental period is 144h, former using flame
Son absorbs sends out the content of beary metal measuring in soil sample；The clearance of chromium is：87.8%.
Embodiment 4
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, and negative electrode and anode are graphite cake
Electrode, and be connected with the negative pole of power supply, positive pole respectively；Yin, yang pole room is 1 with the volumetric ratio of soil chamber：3；Take from chromium slag muck
Put place soil, its chromium concn is 150 mg/kg；Voltage is 30 V, and anolyte is that the citric acid-sodium citrate of pH=3 is delayed
Rush liquid, negative electrode is the Fe of 3 mol/L2(SO4)3Solution, eluent concentration is 3 g/L, and experimental period is 144 h, former using flame
Son absorbs sends out the content of beary metal measuring in soil sample；The clearance of chromium is：89.1%.
Embodiment 5
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, and negative electrode and anode are graphite cake
Electrode, and be connected with the negative pole of power supply, positive pole respectively；Yin, yang pole room is 1 with the volumetric ratio of soil chamber：3；Take from chromium slag muck
Put place soil, its chromium concn is 150 mg/kg；Voltage is 30 V, and anolyte is that the citric acid-sodium citrate of pH=3 is delayed
Rush liquid, negative electrode is the Fe (NO of 3 mol/L3)3Solution, eluent concentration is 3 g/L, and experimental period is 144 h, former using flame
Son absorbs sends out the content of beary metal measuring in soil sample；The clearance of chromium is：86.9%.
Embodiment 6
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, and negative electrode and anode are graphite cake
Electrode, and be connected with the negative pole of power supply, positive pole respectively；Yin, yang pole room is 1 with the volumetric ratio of soil chamber：3；Take from chromium slag muck
Put place soil, its chromium concn is 150 mg/kg；Voltage is 30 V, and anolyte is that the citric acid-sodium citrate of pH=3 is delayed
Rush liquid, negative electrode is the Fe (NO of 5 mol/L3)3Solution, eluent concentration is 3 g/L, and experimental period is 144 h, former using flame
Son absorbs sends out the content of beary metal measuring in soil sample；The clearance of chromium is：88.3%.
Embodiment 7
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, and negative electrode and anode are graphite cake
Electrode, and be connected with the negative pole of power supply, positive pole respectively；Yin, yang pole room is 1 with the volumetric ratio of soil chamber：3；Take from chromium slag muck
Put place soil, its chromium concn is 150 mg/kg.Voltage is 30 V, and anolyte is that the citric acid-sodium citrate of pH=3 is delayed
Rush liquid, negative electrode is the Fe (NO of 3 mol/L3)3Solution, eluent concentration is 5 g/L, and experimental period is 144 h, former using flame
Son absorbs sends out the content of beary metal measuring in soil sample；The clearance of chromium is：89.5%.
Embodiment 8
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, and negative electrode and anode are graphite cake
Electrode, and be connected with the negative pole of power supply, positive pole respectively；Yin, yang pole room is 1 with the volumetric ratio of soil chamber：3；Take from chromium slag muck
Put place soil, its chromium concn is 150 mg/kg；Voltage is 30 V, and anolyte is that the citric acid-sodium citrate of pH=3 is delayed
Rush liquid, negative electrode is the Fe (NO of 3 mol/L3)3Solution, eluent concentration is 7 g/L, and experimental period is 144 h, former using flame
Son absorbs sends out the content of beary metal measuring in soil sample；The clearance of chromium is：90.3%.
Embodiment 9
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, and negative electrode and anode are graphite cake
Electrode, and be connected with the negative pole of power supply, positive pole respectively；Yin, yang pole room is 1 with the volumetric ratio of soil chamber：3；Take from chromium slag muck
Put place soil, its chromium concn is 150 mg/kg；Voltage is 30 V, and anolyte is that the citric acid-sodium citrate of pH=3 is delayed
Rush liquid, negative electrode is the FeCl of 3 mol/L3Solution, eluent concentration is 5 g/L, and experimental period is 144 h, using NITRATE BY FLAME ATOMIC
Absorb and send out the content of beary metal measuring in soil sample；The clearance of chromium is：88.7%.
Embodiment 10
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, and negative electrode and anode are graphite cake
Electrode, and be connected with the negative pole of power supply, positive pole respectively；Yin, yang pole room is 1 with the volumetric ratio of soil chamber：3；Take from chromium slag muck
Put place soil, its chromium concn is 150 mg/kg；Voltage is 30 V, and anolyte is that the citric acid-sodium citrate of pH=3 is delayed
Rush liquid, negative electrode is the FeCl of 3 mol/L3Solution, eluent concentration is 7 g/L, and experimental period is 144 h, using NITRATE BY FLAME ATOMIC
Absorb and send out the content of beary metal measuring in soil sample；The clearance of chromium is：89.3%.
Embodiment 11
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, and negative electrode and anode are graphite cake
Electrode, and be connected with the negative pole of power supply, positive pole respectively；Yin, yang pole room is 1 with the volumetric ratio of soil chamber：3；Take from chromium slag muck
Put place soil, its chromium concn is 150 mg/kg；Voltage is 30 V, and anolyte is that the citric acid-sodium citrate of pH=3 is delayed
Rush liquid, negative electrode is the Fe of 3 mol/L2(SO4)3Solution, eluent concentration is 5 g/L, and experimental period is 144 h, former using flame
Son absorbs sends out the content of beary metal measuring in soil sample；The clearance of chromium is：90.5%.
Embodiment 12
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, and negative electrode and anode are graphite cake
Electrode, and be connected with the negative pole of power supply, positive pole respectively；Yin, yang pole room is 1 with the volumetric ratio of soil chamber：3；Take from chromium slag muck
Put place soil, its chromium concn is 150 mg/kg；Voltage is 30 V, and anolyte is that the citric acid-sodium citrate of pH=3 is delayed
Rush liquid, negative electrode is the Fe of 3 mol/L2(SO4)3Solution, eluent concentration is 7 g/L, and experimental period is 144 h, former using flame
Son absorbs sends out the content of beary metal measuring in soil sample；The clearance of chromium is：91.2%.
Embodiment 13
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, and negative electrode and anode are graphite cake
Electrode, and be connected with the negative pole of power supply, positive pole respectively；Yin, yang pole room is 1 with the volumetric ratio of soil chamber：3；Take from chromium slag muck
Put place soil, its chromium concn is 150 mg/kg；Voltage is 50 V, and anolyte is that the citric acid-sodium citrate of pH=3 is delayed
Rush liquid, negative electrode is the Fe (NO of 3 mol/L3)3Solution, eluent concentration is 3 g/L, and experimental period is 144 h, former using flame
Son absorbs sends out the content of beary metal measuring in soil sample；The clearance of chromium is：94.5%.
Embodiment 14
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, and negative electrode and anode are graphite cake
Electrode, and be connected with the negative pole of power supply, positive pole respectively；Yin, yang pole room is 1 with the volumetric ratio of soil chamber：3；Take from chromium slag muck
Put place soil, its chromium concn is 150 mg/kg；Voltage is 50 V, and anolyte is that the citric acid-sodium citrate of pH=3 is delayed
Rush liquid, negative electrode is the FeCl of 3 mol/L3Solution, eluent concentration is 3 g/L, and experimental period is 144 h, using NITRATE BY FLAME ATOMIC
Absorb and send out the content of beary metal measuring in soil sample；The clearance of chromium is：91.4%.
Embodiment 15
A kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, and negative electrode and anode are graphite cake
Electrode, and be connected with the negative pole of power supply, positive pole respectively；Yin, yang pole room is 1 with the volumetric ratio of soil chamber：3；Take from chromium slag muck
Put place soil, its chromium concn is 150 mg/kg；Voltage is 50 V, and anolyte is that the citric acid-sodium citrate of pH=3 is delayed
Rush liquid, negative electrode is the Fe of 3 mol/L2(SO4)3Solution, eluent concentration is 3 g/L, and experimental period is 144 h, former using flame
Son absorbs sends out the content of beary metal measuring in soil sample；The clearance of chromium is：96.7%.
Examples detailed above is enumerate in concrete application several, the invention is not limited in this several specific embodiment party
Case, one of ordinary skilled in the art can make being embodied as of various ways in scope of the presently claimed invention
Scheme, these embodiments broadly fall into protection scope of the present invention.
Claims (7)
1. a kind of nano zero valence iron nickel drip washing electromotion repairing technique chromium slag muck puts the device on ground, including electro reclamation device and drip washing
System；It is characterized in that：Described electro reclamation device includes cathode chamber（11）, anode chamber（7）With soil chamber（8）, and in soil
The upper surface of device be provided with the leacheate shower nozzle of elution circuit（22）, by leacheate shower nozzle（22）To soil chamber（8）Enter
Row sprays；In soil chamber（8）Lower section be provided with a track or conveyer belt and be used for separating soil chamber（8）, realize to chromium slag muck
Put the continuously automatically controlled reparation of place soil；
Described electro reclamation device is anode pH control room（1）By anode pH probe（24）Sensing electrolyte pH, by anode
Pump control line（37）Control anode pump（29）Pump into anolyte, carry out the regulation of electrolyte ph；Negative electrode grug feeding jar（5）And
Negative electrode pH control room（6）By negative electrode pH probe (13）Sensing electrolyte ph, by negative electrode pump control line（38）Control negative electrode
Pump（17）Pump into catholyte, carry out the regulation of electrolyte pH；Anode chamber（7）, soil chamber（8）, cathode chamber（11）, negative electrode electricity
Pole（12）And anode electrode（25）, respectively by the subsidiary filter paper of hole dividing plate（14）Separate, and pass freely through liquid and ion；Sun
Ionic membrane（10）Stop the OH that negative electrode produces-Enter soil chamber（8）；Catholyte overfall（15）The alkaline solution warp overflowing
Discharge after process；By filter cloth（19）And quartz sand（20）Filter leacheate；Electrolysis unit also includes：Aeration tube（26）, negative electrode
Electrolyte overfall（28）, anolyte feed tube（30）, anode chemical feed pipe（31）, negative electrode chemical feed pipe（32）, external power supply
（33）, spoil disposal pipeline（34）, sludge pump（35）With the anode chamber and the cathode chamber base（36）；
Described elution circuit is by leacheate storage chamber（3）Nano zero valence iron nickel bimetal suspension and sour circulation fluid reserve room
（4）In acid solution, respectively through leacheate shower nozzle（22）With acid solution shower nozzle（21）It is sprayed in soil；Described leacheate shower nozzle（22）
It is to be uniformly arranged on soil chamber（8）Top；Described acid solution shower nozzle（21）It is to be uniformly arranged on above negative electrode soil, described
Acid solution is to be collected in anode spillage in sour fluid reservoir by elevator pump to be reused.
2. device according to claim 1 it is characterised in that：Described cathode chamber（11）Electrolyte be 0.02-10mol/L
Iron salt；Described anode chamber（7）Electrolyte be pH value 2-6 citric acid-sodium citrate buffer solution；Described leacheate storage chamber
（3）Leacheate be 0.05-10g/L nanometer Fe/Ni bimetallic suspension.
3. device according to claim 1 it is characterised in that：Described iron salt is Fe2(SO4)3、Fe(NO3)3And FeCl3In
One kind.
4. device according to claim 1 it is characterised in that：Described electrode is graphite electrode；Described voltage is 5-50V；
The described repair time repairing chromium slag is 36-300 hour.
5. device according to claim 1 it is characterised in that：Described cathode chamber（11）, anode chamber（7）With soil chamber（8）
Volumetric ratio be 3: 3：5-50.
6. device according to claim 1 it is characterised in that：Described nano zero valence iron nickel drip washing electromotion repairing technique chromium slag
The restorative procedure stacking the device on ground is to be realized by elution circuit drip washing and electromotion repairing technique, and concrete grammar is as follows：
（1）Heavy-metal contaminated soil is placed in soil chamber（8）, and add activated carbon fiber to activated carbon fiber room, then by sun
Ionic membrane（10）It is attached to and wrapped up by filter paper on hole dividing plate；
（2）By negative electrode pH control room（6）With anode pH control room（1）By pH probe induced electrolyte ph, control negative electrode pump
（17）With anode pump（29）Pump into catholyte and anolyte, and the pH of electrolyte is adjusted control；
（3）To leacheate storage chamber（3）Nanometer Fe/Ni bimetallic the suspension of middle addition 0.05-10 g/L, by leacheate shower nozzle
（22）Uniformly it is sprayed in contaminated soil and carry out drip washing；
（4）Repair process Anodic acidic electrolysis spillage, by catholyte spillage elevator pump（27）Pump into sour circulation fluid
Reserve room（4）, through acid solution shower nozzle（21）Instill the soil near negative electrode, adjust its soil pH；Negative electrode alkaline electrolysises spillage leads to
Discharge after crossing process；
（5）The heavy metal precipitation thing that negative electrode generates is through discharge pipeline（34）Discharge, recycle after treatment；
（6）The filter cloth through soil chamber bottom for the leacheate and quartz sand are discharged, and discharge after being collected processing.
7. device according to claim 6 it is characterised in that：Described drip washing is by leacheate storage chamber（3）Nano zero-valence
Ferrum nickel bimetal suspension and utilize catholyte spillage elevator pump（27）It is stored in sour circulation fluid reserve room（4）Acid solution,
Respectively through leacheate shower nozzle（22）With acid solution shower nozzle（21）It is sprayed in soil, realize the reparation of heavy metal contaminated soil.
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