CN106623386B - Electric restoration vertical device for heavy metal contaminated soil - Google Patents

Abstract

The invention discloses an electric contaminated soil remediation device which is formed by connecting a plurality of treatment units in series or in parallel. Each processing unit comprises a vertical cylindrical insulating processing box, a vertical cylindrical COMBOPO detachable and replaceable composite cathode, an inert anode, a self-made non-standard programmable SynC alternating current and direct current hybrid power supply, a CAMP bag and the like. The method can be applied to the remediation and treatment of heavy metal and/or organic and/or radioactive contaminated soil and/or sludge and/or solid waste, and can also be applied to the enrichment and extraction of rare and/or rare earth and/or precious metal lean ores.

Description

A kind of electro reclamation vertical unit of heavy-metal contaminated soil

Technical field

The invention belongs to remediation of heavy metal-contaminated soil field, and in particular to a kind of heavy-metal contaminated soil it is electronic Prosthetic device.

Background technology

So-called " permanent to repair " is sought to contaminated soil（Including mud and other solid waste）Deng medium In landfill come out.Theoretically, landfill method includes physics, chemical and biological three major types. Wherein, the electronic technology that amends the law（Electrokinetic processing, EK）Mainly physical technique, although it be possible to Chemistry or biological technology is compound so as to forming new reparation pattern.

Early in the eighties in last century, the heavy metal in soil is extracted using electric power with regard to someone.1993, American Acar The article for being intended to explain electro reclamation principle has been delivered first, is represented electric repairing technique and is formally formed.About nineteen ninety-five is left Small-scale research is done with regard to someone by the right side, the country.But the earliest article that the country can be found at present is in beginning of this century Zhou Dongmei and Deng Prosperous sweet smell（2003）Be published in《Agro-environment science journal》On《The electric repairing technique of heavy-metal contaminated soil study into Exhibition》.

The general principle of electro reclamation is inserted electrodes into contaminated soil, after direct current is applied, soil hole The aqueous solution in gap produces EOF so as to negative electrode electromigration occurs for charged metal cation, while powered anion faces south Pole migrates, and the superposition of a variety of travel motions carries the soil that heavy metal contaminants leave treatment region, and passes through at negative and positive the two poles of the earth and sink The mode such as product or ion exchange, absorption, extraction is removed, so as to reach the purpose of reparation., can be with during electro reclamation Generation electrolysis, EOF and phenomena such as electromigration, major influence factors include the electrolysis of water, soil property, heavy metal species and Concentration etc..The main research of domestic and foreign scholars includes：

1st, alkaline band how is controlled, improves remediation efficiency.During electro reclamation, in the sky apart from negative electrode 1/3 ~ 2/3 Between in the range of, pH value >=9 " alkaline band " can be produced.Most of heavy metals when running into alkaline band, just and OH^-Combine to form hydrogen Oxide precipitation, so as to cause the interruption of transition process, cause repairing failure.In order to control the scope of alkaline band, improve and repair Efficiency, many scholars propose improvement idea, common are acid-base neutralization method, cation selective embrane method, electroosmose process, complexing Agent method, surfactant method, oxidation-reduction method, EK- biotechnologys combination method and Lasagna^TMMethod.

2nd, electric power supply mode.Including（1）The control electric current method and control voltage method of direct current；（2）Alterating and direct current is handed over For the technology and method used.Usually, the electric-force gradient of direct current is (0.4~2V/cm) and current density (2~5mA/ cm²)。

3rd, the research of the mechanism and its influence factor of electro reclamation.The main mode including contaminant transportation, mechanism and its Mathematical modeling etc..Study the influence of soil types and its property to repairing effect etc..About studying the effect to improving electro reclamation Rate has great importance.

4th, application study.Cu contaminated soils are repaired including electricity；It is dehydrated using EOF principle from sludge；Utilize The control negative electrode such as Tween80, nitric acid, EDTA pH；Heavy-metal contaminated soils such as Cr, Pb, Zn, Cd, Hg etc. are repaired using EK.Also wrap Include the reparation to mud, bed mud and organic pollution contaminated soil.

In terms of from the locus that technology is realized, electric repairing technique is segmented into In-situ, original place strange land is repaired and different Ground dystopy three major types.The invention belongs to realize prosthetic device that original place ex-situ techniques design.Domestic in situ dystopy at present Technical Exemplary patents technology is as follows.

Patent CN1695834（Publication date 2005-11-16）《The electromotion repairing technique method of heavy-metal contaminated soil》：One The electromotion repairing technique method of heavy metal species contaminated soil, negative electrode and tested soil sample are separated using amberplex, are used in combination Porous ceramic plate, which is placed between amberplex and soil, prevents and treats amberplex blocking, utilizes H caused by electrode itself⁺With OH^-, and by the iris action of amberplex, control the pH value of soil during electromotion repairing technique, accelerate pollutant Dissolution and migration.Anodic dissolution keeps highly acid after processing, for cleaning, regenerant ions exchange membrane.Cathode solution keeps highly basic Property, most of heavy metal cations are combined with alkali generates precipitation, and purity heavy metal compound is obtained by precipitation, centrifugal purification, And the alkaline cathode solution after being purified is used for the acid of sweetening of the soil.This method has safe and reliable, easy to operate and cost The advantages that cheap, the pH value of soil can substantially return to original state after reparation.

Patent CN1714955（Publication date 2006-01-04）《Heavy-metal contaminated soil cathode acidifying electric power repairs work Skill》：The invention discloses a kind of cathode acidifying electric power repairing process for heavy metal contaminated soil, and it is mainly comprised the following steps：Will be through certainly Ionized water so is added in the soil of air-dried decontamination, stirs stewing process, the contaminated soil of processing loads Electroremediation device Soil chamber, then stood into each pole tank house after input electrolyte, then be passed through constant dc current, the heavy metal in contaminated soil Constantly desorbed during reparation from soil, and soil is migrated out in the presence of electric field, so as to realize heavy metal The improvement of contaminated soil.The technique of the present invention has the features such as repair time is short, easy to operate, heavy metal removing rate is higher, has Obvious economic benefit and social benefit.

Patent CN201511038U（Publication date 2010-06-23）《Electromotive power chromium pollution soil restoration device》：It is a kind of electronic Power complex repairation chromium-polluted soil device, it includes anode region, cathodic region and power supply, and it also includes porous media sand stone layer and iron Consider layer to be worth doing, place anode buffer solution and negative electrode cushioning liquid respectively in anode region and cathodic region, and connect respectively with two poles； Porous media sand stone layer and iron filings layer are set gradually on the opposite face in anode region and cathodic region, is formed between cathodic region to a huge sum of money The reparation area that category contaminated soil is repaired.The utility model is under electrodynamic action, and nearby electrification occurs electrode for the soil liquid Element reaction is learned, changes oxidation-reduction potential, the physicochemical property such as pH value in soil, accelerates the solution of heavy metal on soil solid Inhale, improve the concentration of heavy metal in the soil liquid, so as to the absorption of fortification of plants, accumulation, make the more of Soil Microorganism colony Sample and vigor greatly increase, and add the yield of crop.

Patent CN102284474A（Publication date 2011-12-21）《Utilize electric energy repairing polluted soil and processing solid waste Method and device》：The present invention relates to a kind of repairing polluted soil and processing solid waste method and device, Gu soil/ Useless both ends set up negative electrode and anode reaction pond separately, and bottom sets moisturizing layer, supplement in water containing can improve organic pollution and heavy metal exists The chemical agent of solubility in water, top cover replaceable contaminant collecting layer, and inside sets replaceable artificial focusing band. Soil/solid waste temperature is set to rise to tens of or even hundreds of degree by applying high voltage and high current, volatile organic contaminant is because of height Temperature therefrom evaporates, and Unvolatilized organic pollutant and heavy metal are trapped in collection after water evaporation with the collecting layer waterborne that rises to In layer, part heavy metal ion is moved in electrode cell and artificial focusing band along direction of an electric field.Hydrogen caused by yin, yang the two poles of the earth and Oxygen is collected separately for burning pollutant evaporate, in collecting layer and in focal zone；Oxygen may also be fabricated which In ozone oxidation soil/solid waste or the pollutant that has cleared.

Patent CN102357522A（Publication date 2012-02-22）《One kind is using multiple polar electric pole electro reclamation pollution of chromium soil The method of earth》：The invention discloses a kind of method of multiple polar electric pole electro reclamation chromium-polluted soil, it is adapted to the different of contaminated soil Repair position.This method builds multipole faradaic reaction device first, device by controllable dc source, graphite anode, anode slot, Rigid plastics expanded metals, soil chamber, cathode can, graphite cathode composition.Using above-mentioned multipole faradaic reaction device, take Cr VI dirty Soil is contaminated, soil moisture content 30~50%, impurity relatively large in soil is removed, stirs, be filled into soil chamber, then Simultaneously into two slot electrodes plus water, make two slot electrodes liquid level and soil chamber in soil surface be consistent, then Direct current is passed to, voltage gradient is 1.0~2.0V/cm.Remain powered on the time 120~144 hours, reparation terminates.Reparation terminates Afterwards, soil is positively retained at 6.0~8.0 from anode region to cathodic region pH；Eh is between 300~85mV.Total chromium clearance reaches To 74.2~81.5%, hexavalent chromium removal rate reaches 84.1~89.6%.

Patent CN104492796A（Publication date 2015-04-08）《A kind of method of electro reclamation heavy-metal contaminated soil》： The invention belongs to soil remediation field, discloses a kind of method of electro reclamation heavy-metal contaminated soil, described method and step Including as follows：The soil of configuration simulation heavy metal pollution is standby；Make electrokinetic tests device by oneself：Mainly include 5 reactive tanks, successively Sequentially it is：Anode chamber, soil chamber, cathode chamber, soil chamber and anode chamber, there is the permeable coefficient tensor containing molecular sieve between reactive tank PRB, additionally contain Yin/Yang pole electrode and Yin/Yang pole working solution, and DC voltage-stabilizing power supply including Yin/Yang pole room；Again Contaminated soil is loaded in self-control electrokinetic tests device；Electrokinetic tests are run, take its soil to carry out Analysis of Heavy Metal after one week Test.

Patent CN204276511U（Publication date 2015-04-22）《A kind of prosthetic device of heavy-metal contaminated soil》：It is a kind of The prosthetic device of heavy-metal contaminated soil, using confession of the movable wind-solar complementary electric power system as Electrokinetic Remediation of Polluted Soils Power supply, direct current is exported by wind-power electricity generation and solar cell power generation, while charged with battery, by battery to electronic Prosthetic appliance provides stable electric energy, and the positive and negative electrode exported respectively with electro reclamation equipment both ends of battery is connected, positive and negative Electrode is individually placed in anode pool, cathode pool, and anode pool, cathode pool are outer to be connected with both sides work liquid storage tank respectively by pump and pipeline Connect, heavy-metal contaminated soil is placed among electro reclamation equipment, and the sintered glass filter disc and anode pool, negative electrode for passing through both sides Pond separates.Power supply of the utility model using movable wind-solar complementary electric power system as Electrokinetic Remediation of Polluted Soils, is solved Remote contaminated site is transmitted electricity the problem of difficult, energy saving, effectively reduces the operating cost of the technology.

Patent CN104550215A（Publication date 2015-04-29）《The method of electro reclamation heavy-metal contaminated soil and set It is standby》：A kind of method of electro reclamation heavy-metal contaminated soil, electrolytic cell is set at contaminated soil both ends, electricity is inserted in electrolytic cell Pole, the voltage source of adjustable electrode potential is connected between the electrodes, if contaminant ion or contaminant compound positively charged, Then negative electrode potential absolute value is set to be higher than positive electrode potential absolute value.In addition, by feeding device and pumping equipment respectively with electricity Xie Chi is connected, and is to add and discharge electrolyte in electrolytic cell.The invention also discloses setting for electro reclamation heavy-metal contaminated soil Standby, it includes voltage source, soil chamber, electrolytic cell, electrode, discharging tube, feed tube and liquid feeding pump.The present invention can improve pollutant Clearance, energy consumption is reduced, and equipment is simple, cost is cheap.

Patent CN103418607A（Publication date 2013-12-04）《A kind of contaminated soil magnetic helps electro reclamation device》：This hair It is bright to disclose a kind of contaminated soil magnetic and help electro reclamation device.By the effect in extra electric field and magnetic field, make the pollution in soil Material accelerates to be enriched in predetermined region, reaches the purpose of cleaning soil.Apparatus of the present invention include electrode solution adding tube, positive plate, Treatment region, cathode column, electrode chamber, magnet, shell, electrode solution delivery pipe.Contaminated soil is placed in treatment region, electrode solution is by pipe Road enters electrode chamber area, and then the pollutant in soil in the presence of additional electromagnetic field migrates rapidly, improves local pollution The concentration of thing.The present invention is simple in construction, construction cost is low, easily operated, and can realize multiple pollutant in soil Degraded removes.

Patent CN103406347A（Publication date 2013-11-27）《One kind can be used for heavy metal and organic matter in Enriching soil Method》：It can be used for the method for heavy metal and organic matter in Enriching soil the invention discloses a kind of, it is characterised in that by taking Build electrokinetic enrichment system and electric field is formed in soil, by EOF, electromigration by the heavy metal and organic matter in soil A certain region is enriched in, is then separated, purified；The electrokinetic enrichment system electrokinetic enrichment system is by controllable direct current Source, anode chamber, cathode chamber, soil, electrode, cation-exchange membrane composition；Anode chamber and anode, cathode chamber and negative electrode are positioned at electronic The both sides of reaction system, soil are located at the centre of two electrodes, and cation-exchange membrane is set between cathode chamber and soil, controllable straight Flow power supply jointed anode and negative electrode.Be enriched with using method provided by the invention, the more plants enriched time is short, not by it is natural because The influence of element and heavy metal, which are enriched with, does not have selectivity, and then the purpose of changing rejected material to useful resource and rehabilitating soil.

Patent CN203380185U（Publication date 2014-01-08）《A kind of device using Electroremediation contaminated soil》： The utility model discloses a kind of device using Electroremediation contaminated soil, is reacted comprising dc source (1), soil remediation Device (13), electrode (6), cation-exchange membrane (8).The device can be by applying DC voltage at soil both ends, forming direct current , heavy metal, organic matter etc. is removed under the effect such as electromigration and EOF.Available for the heavy metal in various soil And the removal of organic matter.It is quick, effective using present apparatus repairing polluted soil, do not influenceed by natural cause.

Patent CN103736718A（Publication date 2014-04-23）《The electric repair method and its dress of heavy-metal contaminated soil Put》：The present invention relates to the electric repair method of heavy-metal contaminated soil and its device, the present invention provides a kind of heavy metal polluted soil The electro reclamation device of earth, described device include preprocessing system, D.C. regulated power supply, electronic electrode etc., master control system and After-treatment system, wherein, master control system connects and controls the preprocessing system, D.C. regulated power supply and after-treatment system； D.C. regulated power supply provides power supply for electronic electrode.Electronic soil restoring technology can realize that the original position of heavy-metal contaminated soil is repaiied It is multiple, secondary pollution is not produced, processing cost is relatively low.It is high, easy to solve conventional soil restoring technology equipment investment height, processing cost Cause the problems such as secondary pollution.

Patent CN103752596A（Publication date 2014-04-30）《The method and dress of metal ion in repairing polluted soil Put》：The invention discloses a kind of method and device of metal ion in repairing polluted soil.This method is by electrodynamics and quiet Two kinds of recovery techniques of Electrospun nano-fibers film PRB are used in combination with the metal ion in repairing polluted soil.The device includes Soil chamber and anode chamber, the cathode chamber for being respectively arranged on soil chamber both ends, between soil chamber and anode chamber, soil chamber and cathode chamber it Between be respectively provided with one layer of Electrospun nano-fibers film PRB, be provided with anode in anode chamber, negative electrode, anode and the moon be provided with cathode chamber Pole is connected with the both ends of dc source respectively.The method and device of the present invention is by electrodynamics and Electrospun nano-fibers film PRB combinations are to improve the mechanical strength of PRB reaction mediums and resistance to chemical corrosion, can efficiently remove metal in contaminated soil Ion.

Patent CN102806228A（Publication date 2012-12-05）《A kind of contaminated soil heterotopic electro reclamation device and its side Method》：The purpose of the present invention is to avoid focusing phenomenon from occurring, shorten the electro reclamation time, is repaiied so as to improve repairing effect and reduction Multiple expense.To realize that the technical scheme that the object of the invention uses is a kind of such, contaminated soil heterotopic electro reclamation device, Including soil bearing system, electrode system and electrode working solution spray system.The bottom porous layer I of the soil bearing system. The electrode system includes being separately positioned on the Top electrode and bottom electrode of soil bearing system upper and lower, described upper and lower during work Electrode institute is electrically charged opposite.The electrode working solution spray system includes being arranged on some sprays below the soil bearing system Mouth is drenched, during work, the spray nozzle sprays working solution upwards.

Patent CN102941217A（Publication date 2013-02-27）《A kind of drum type brake arrangement electrode Electroremediation device and Method》：The invention discloses a kind of drum type brake to arrange electrode Electroremediation apparatus and method, belongs to environmental protection equipment technology neck Domain.The device of the present invention is had the annular or arc-shaped electrode of together circle center by electrode solution storage bin, electrode fluid valve, at least two Room and electrode, electrode flow meters, liquid feeding pump valve, fluid filling pump, adsorption layer composition；Electrode is located in electrode chamber, and with it is external Dc source is connected；Electrode chamber is connected with fluid filling pump.Described method is：Pass through the pollution feelings to pending contaminated site Condition, suitable electrode chamber quantity is selected, electrode chamber and electrode are embedded to underground, by fluid filling pump by electrode solution injecting electrode room； It is powered to electrode, so that the heavy metal ion inside contaminated site is adsorbed on the sorbing material on adsorption layer, so as to reach To the purpose for removing removing heavy metals.The apparatus structure of the present invention is simple, easy to use, low engineering cost, and use range is wide；The present invention The method of offer have the advantages that it is economical, efficiently, it is energy-conservation, quick.

Patent CN103170499A（Publication date 2013-06-26）《A kind of soil or Heavy Metals in Sludge and organic pollution Electronic minimizing technology》：The present invention provides a kind of soil or the electronic minimizing technology of Heavy Metals in Sludge and organic pollution, should Using following electronic removal device, it includes Fang Fangfa：Rotating cylinder, thereon covered with conductive material, conductive material outside It is coated with the reaction wood bed of material；Gear, it is provided around the rotating cylinder；Outside closed loop hinge crawler belt, it is by conductive material It is made, and is operated by being engaged on the gear and closed loop；Closed loop conveys crawler belt, and it is used for conveying soil or sludge, and wears The gap crossed between the outside closed loop hinge crawler belt and the rotating cylinder and be pressed on the rotating cylinder.By making With described device and the suitable operation technological parameter of selection, the effective and rapid ground of energy removes the weight in polluted soil or sludge simultaneously Metal and/or organic pollution, it is easy to operate, removal efficiency is high, there is good prospects for commercial application.

Patent CN103316909A（Publication date 2013-09-25）《Electric power for heavy metal or organic material contaminated soil Learn prosthetic device and method》：It is more particularly to a kind of to be used for heavy metal or organic matter dirt the invention belongs to technical field of environmental management Contaminate the electromotion repairing technique device and method of soil.The device is by dc source, anode chamber, gas collector, soil chamber, sun Pole electrode and cathode electrode composition.For apparatus of the present invention under electric press, the electrode electrochemistry element of soil liquid generation nearby is anti- Should, the physicochemical property such as oxidation-reduction potential, pH value in change soil, hypotonicity can be made by hydroxypropyl-β-cyclodextrin One higher electrical conductivity of soil conservation, accelerate soil solid on heavy metal or organic matter desorption.

It is of the invention to have huge difference in the form of whole equipment and the building block etc. of each unit with existing technology.

The content of the invention

To solve the above problems, the invention discloses a kind of Electrokinetic Remediation of Polluted Soils device, the device is by a processing Unit is formed or is made up of several processing units serial or parallel connection；The processing unit includes：Vertical cylinder insulate Treatment box, vertical cylinder COMBOPO detachable changeable types composite cathode, inert anode, the nonstandard programmable SynC of self-control hand over straight Flow hybrid power supply, CAMP bags；It is detachable more that vertical cylinder COMBOPO is accommodated in the vertical cylinder insulation processing case Change formula composite cathode, inert anode, CAMP bags.

Further, the vertical cylinder insulation processing case is made up of one of fiberglass, insulation rubber cushion, insulation board.

Further, one of the optional graphite of the inert anode, titanium alloy, platinum are made.

Further, the radius r of the vertical cylinder insulation processing case₁For 0.10m ~ 50m, height H₁For 0.20m ~ 20m。

Further, the vertical cylinder insulation processing case and vertical cylinder COMBOPO detachable changeable types are compound Negative electrode is coaxial；The radius r of the vertical cylinder COMBOPO detachable changeable type composite cathodes₂For 0.01 ~ 30m, height H₂For 0.20m~20m。

Further, the output current voltage of the nonstandard programmable SynC alternating/direct current hybrid power supplies of self-control is： AC0.1V0.01A ~ 100000V10000A/DC0.1V0.01A ~ 100000V10000A, by computer or other PLC technologies Unit controls.Controlled by computer or other PLC technology units, can be according to formula { [A _i ]-[D _j ]} _k , i=1,2,…, N; j=1,2,…,M;K=1,2 ..., L is programmed circular flow.

Further, additive can be injected into the vertical type cylinder by conduit with the additive injector for having cup scale metered Shape insulation processing bottom portion；The injection rate Q of additive is calculated and obtained by formula Q=pW, and wherein p is adjustment factor, and W is vertical circle The quality of soil in column insulation processing case.The additive is water and/or liquid chemical challenges and/or solution.Usually, it is right Need to pass through in Different Soil/mud/solid waste/composition of ore/waste water and the type of additive, p Lab scale determines.Additive injector can be directly mounted at the top for the treatment of box, and additive is directly filled using gravity；Also may be used Put with side, additive is filled with pump；If need not inject additive in repair process, additive injector can omit.According to Q After the dosage of additive is calculated in=pW, the additive configured can also directly be poured into without using additive injector Mixed in treatment box and with substance to be processed.

Further, described device is applied to heavy metal/organic matter/radioactive pollution soil and/or mud and/or solid Discarded object repair process.VOCs, SVOCs, the POPs of described device suitable for soil and/or mud and/or solid waste With the low temperature desorption of the organic pollution such as PCBs.Described device is applied to rare and/or noble metal lean ore enrichment and extraction, Available for industrial and mining enterprises' wastewater treatment containing pollutant.

Beneficial effects of the present invention are embodied in following aspects：

First, " original place dystopy " technology is employed, power wastage caused by electrode ground connection can be avoided, electric power is complete Applied to soil remediation, the energy is both saved, improves reparation speed again, and further saves human and material resources and financial resources etc. The cost of aspect.

Second, use vertical cylinder treatment box and COMBOPO detachable changeable type composite cathodes, it is convenient to omit many Transmission device, soil/mud/waste residue for heavy metal/organic matter/radioactive pollution of fixed location or to be enriched with poor The processing of ore deposit ore is more convenient, and single batch treating capacity is bigger.Cation heavy metal can also be concentrated, by precipitating, adsorbing With the mode such as solidification, by the cathode material of heavy metal " imprison in " volume very little, it is possibly realized for the recycling of heavy metal. Cylindric COMBOPO detachable changeable types composite cathode also has control soil acidity or alkalinity and accelerates the work of heavy metal transformation speed With.

3rd, cylindric treatment box and cylindric COMBOPO detachable changeable types composite cathode are coaxial, can make handling Anode inside case is equal everywhere with the distance of negative electrode so that soil treatment becomes uniform.

Brief description of the drawings

Fig. 1 is the cross-sectional view of a unit of electro reclamation device of the present invention.

In Fig. 1,1 is vertical cylinder insulation processing case；2 be inert anode；3 be CAMP bags；4 be vertical cylinder COMBOPO detachable changeable type composite cathodes；5 be cathode material room；6 be the fixing axle of composite cathode.

Embodiment

Feature of present invention is described in further detail with reference to embodiments.

As shown in figure 1, Electrokinetic Remediation of Polluted Soils device of the present invention is made up of or by some a processing unit Individual processing unit is made up of serial or parallel connection.The processing unit includes：Vertical cylinder insulation processing case（1）；Inertia sun Pole（2）；CAMP bags（3）；Vertical cylinder COMBOPO detachable changeable type composite cathodes（4）；Cathode material room（5）；Compound the moon The fixing axle of pole（6）, the nonstandard programmable SynC alternating/direct current hybrid power supplies of self-control, wherein, the vertical cylinder insulation position Manage case（1）Inside can accommodate inert anode（2）, CAMP bags（3）, vertical cylinder COMBOPO detachable changeable type composite cathodes （4）.Vertical cylinder insulation processing case is preferably made up of fiberglass.Inert anode selects graphite material.Vertical cylinder insulate The radius r for the treatment of box₁For 0.10m ~ 50m, height H₁For 0.20m ~ 20m.Vertical cylinder insulation processing case and vertical cylinder COMBOPO detachable changeable type composite cathodes are coaxial；The half of the vertical cylinder COMBOPO detachable changeable type composite cathodes Footpath r₂For 0.01 ~ 30m, height H₂For 0.20m ~ 20m.

The electro reclamation device course of work of heavy-metal contaminated soil of the present invention is as follows：

Contaminated soil source：Nearby heavy metal polluted soil of farmland and Guizhou wanshan mercury area mercury are dirty for Hunan contaminated site Contaminate the mixture of soil.

Polluted heavy metals element：Cd, Cu, Pb, Zn and Hg etc..

Heavy metal element concentrations versus before and after the mixture soil electro reclamation of table 1

Heavy metal concentration in initial soil：It is shown in Table 1.The pollutant of this mixed soil is mainly heavy metal Cd, Cu, Pb, Zn And Hg, their concentration are 2.38mg/kg, 248.34 mg/kg, 649.75 mg/kg, 505.69 mg/kg and 370.84 respectively mg/kg.They respectively beyond 11.90 times, 7.10 times, 18.56 times, 5.06 times of national soil quality standard primary standard and 2472.27 again；Beyond 2.38 times, 0.62 times, 1.30 times, 1.01 times and 247.23 times of grade III Standard.

Repair flow：（1）Will by device with it is vehicle-mounted enter scene.（2）Manually or mechanical system is by soil to be repaired（It is original Soil）About 2m³Dig out, be transferred in the cloth bag in treatment box, quantity is depending on treatment box size.（3）Add a special huge sum of money Belong to activator, then 1:1 ratio adds clean water, stirs, is placed in cloth bag.（2）On electrode according to separate procedure and when Between alternate the alternating current and direct current for applying certain voltage and electric current, respectively behind 24 hours and 48 hours, equivalent is adopted Collect cloth bag in different exemplary positions pedotheque several, after sufficiently mixing, send laboratory assay Cd, Cu, Pb therein With the concentration of the element such as Zn.

Repairing effect is analyzed：After 24 processing, the concentration of 5 elements such as Cd, Cu, Pb, Zn and Hg becomes respectively in soil Into 1.65 mg/kg, 188.26 mg/kg, 554.68 mg/kg, 496.98 mg/kg and 337.70mg/kg, heavy metal is gone Except rate is 30.67%, 24.19%, 14.63%, 1.72% and 8.94% respectively.Relative to 8.25 times of soil quality primary standard, Again, 5.38 times, 15.85 times, 4.97 times and 2251.33 times；Relative to 1.65 times of soil quality grade III Standard, 0.47 times, 1.11 times, 0.99 times and 225.13 times.

After 48 processing, the concentration of 5 elements such as Cd, Cu, Pb, Zn and Hg has respectively become 0.71 mg/ in soil Kg, 75.66 mg/kg, 229.56 mg/kg, 134.25 mg/kg and 97.33 mg/kg；The clearance of heavy metal is respectively 70.17%th, 69.53%, 64.67%, 73.45% and 73.75%；Relative to 3.55 times of soil quality primary standard, 2.16 times, 6.56 times, 1.34 times and 648.87 times；Relative to 0.71 times of soil quality grade III Standard, 0.19 times, 0.46 times, 0.27 times and 64.89 times.Therefore in addition to Hg elements, Cd, Cu, Pb and Zn element have reached below three-level quality standard；Enter one The analysis test result of step shows, due to being mixed into the Hg contaminated soils from mercury ore area in soil, shared by residual form therein Ratio is higher；After processing in 48 hours, there is the THg of high level in soil, but remaining Hg is mainly the Hg of residual form, The harm of Hg pollutions mitigates significantly.

As can be seen here, using the present apparatus, Cd, Cu, Pb, Zn and Hg in soil etc. can be effectively reduced in 48 hours and is weighed Metallic element.After the processing of 48 hours, the concentration of all elements declines more than 64%, wherein under Hg elements in soil Range of decrease degree is maximum, reaches about 73.75%.

Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not to this The restriction of the embodiment of invention.For those of ordinary skill in the field, on the basis of the above description can be with Make other changes in different forms.Here all embodiments can not be exhaustive.It is every to belong to the present invention The obvious changes or variations extended out of technical scheme still in protection scope of the present invention row.

Claims (10)

1. a kind of Electrokinetic Remediation of Polluted Soils device, it is characterised in that the device is made up of or by several processing unit Processing unit is made up of serial or parallel connection；The processing unit includes：Vertical cylinder insulation processing case, vertical cylinder COMBOPO detachable changeable types composite cathode, inert anode, the nonstandard programmable SynC alternating/direct current hybrid power supplies of self-control, CAMP bags；Vertical cylinder COMBOPO detachable changeable types composite cathode, lazy is accommodated in the vertical cylinder insulation processing case Property anode, CAMP bags.

2. Electrokinetic Remediation of Polluted Soils device according to claim 1, it is characterised in that the vertical cylinder insulation position Reason case is made up of one of fiberglass, insulation rubber cushion, insulation board.

3. Electrokinetic Remediation of Polluted Soils device according to claim 1, it is characterised in that stone may be selected in the inert anode One of ink, titanium alloy, platinum are made.

4. Electrokinetic Remediation of Polluted Soils device according to claim 1, it is characterised in that the vertical cylinder insulation position The radius r1 for managing case is 0.10m ~ 50m, and height H1 is 0.20m ~ 20m.

5. Electrokinetic Remediation of Polluted Soils device according to claim 1, it is characterised in that the vertical cylinder insulation position Manage case and vertical cylinder COMBOPO detachable changeable type composite cathodes are coaxial；The vertical cylinder COMBOPO is detachable more The radius r2 for changing formula composite cathode is 0.01 ~ 30m, and height H2 is 0.20m ~ 20m.

6. Electrokinetic Remediation of Polluted Soils device according to claim 1, it is characterised in that the self-control is nonstandard programmable The output current voltage of SynC alternating/direct current hybrid power supplies is：AC0.1V0.01A~100000V10000A/DC0.1V0.01A~ 100000V10000A, controlled by computer or other PLC technology units.

7. Electrokinetic Remediation of Polluted Soils device according to claim 1, it is characterised in that the available addition for having cup scale metered Additive is injected the vertical cylinder insulation processing bottom portion by agent injector by conduit；The injection rate Q of additive is by public affairs Formula Q=pW is calculated and obtained, and wherein p is adjustment factor, and W is the quality of soil in vertical cylinder insulation processing case.

8. Electrokinetic Remediation of Polluted Soils device according to claim 1, it is characterised in that described device is applied to heavy metal And/or organic matter and/or radioactive pollution soil and/or mud and/or solid waste repair process.

9. Electrokinetic Remediation of Polluted Soils device according to claim 1, it is characterised in that described device is applied to soil And/or the low temperature desorption of VOCs, SVOCs, POPs and PCBs organic pollution in mud and/or solid waste.

10. Electrokinetic Remediation of Polluted Soils device according to claim 1, it is characterised in that described device is applied to rare And/or the enrichment and extraction of noble metal lean ore, it can also be used to industrial and mining enterprises' wastewater treatment containing pollutant.