CN201454978U - Heavy metal polluted soil electrokinetic adsorbing and compounding remediation device for plants - Google Patents

Heavy metal polluted soil electrokinetic adsorbing and compounding remediation device for plants Download PDF

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Publication number
CN201454978U
CN201454978U CN2009200735835U CN200920073583U CN201454978U CN 201454978 U CN201454978 U CN 201454978U CN 2009200735835 U CN2009200735835 U CN 2009200735835U CN 200920073583 U CN200920073583 U CN 200920073583U CN 201454978 U CN201454978 U CN 201454978U
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China
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heavy metal
soil
porous media
area
region
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CN2009200735835U
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陈威
杨瑞
孙祯
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Shanghai Maritime University
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Shanghai Maritime University
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Abstract

The utility model discloses a heavy metal polluted soil electrokinetic adsorbing and compounding remediation device for plants, which comprises an anodic area, a cathode area, a power supply, porous medium partition boards and porous medium adsorption material, wherein anode buffer solution and cathode buffer solution are respectively filled in the anodic area and the cathode area which are respectively connected to two poles of the power supply; the porous medium partition boards and the porous medium adsorption material are sequentially respectively arranged from the inside to the outside on a surface of the anodic area opposite to the cathode area and on a surface of the cathode area opposite to the anodic area; and a remediation area for remedying heavy metal polluted soil for planting plant roots is formed between every two porous medium adsorption material layers. Under the action of voltage power, the heavy metal polluted soil electrokinetic adsorbing and compounding remediation device for plants is capable of quickening desorption of heavy metal on soil solidity and increasing density of heavy metal in soil solution in order to strengthen absorption and accumulation of the plant and greatly increase diversity and vitality of microbial populations in soil, thereby increasing the crop yield.

Description

The compound restoration of soil polluted by heavy metal device of electric power absorption plant
Technical field
The utility model relates to remediating heavy metal soil device, particularly be the compound restoration of soil polluted by heavy metal device of a kind of electric power absorption plant.
Background technology
Heavy metal pollution in the soil comes from mining, smelting, municipal refuse, chemical fertilizer impurity and sewage deposit etc., the high enrichment of heavy metal in soil directly influences the output of cereal and its quality descended, even the heavy metal accumulation degree is not high, also may hinder the diversity and the vigor of micropopulation in the soil, thereby have a strong impact on biomass and fertility as the soil on nutrition circulation and sustainable agriculture basis.Therefore, the heavy metal of removing in soil and the water body has become the problem that the mankind need solve.
Direct electronic original position removes heavy metal because the H that generates on anode and negative electrode +And OH -Make the pH of anode reduce to below 2, negative electrode pH rises to more than 12, H +And OH -Under electric field action, influence the chemical process of whole soil system respectively to negative electrode and anode diffusion mobility.Hydrogen ion helps the dissolving of material salts substances from the desorption of soil surface and soil, and reduces soil electro-osmosis coefficient and zeta current potential, makes EOF weaken; Can cause the precipitation in advance of metal ion in the hydroxide ion transition process and then reduce removal efficient; The cation of some amphoteric metals also may become acid radical anion and change migratory direction under alkaline environment; The formation of precipitation is stopped up interstices of soil and is made the increase of voltage drop simultaneously, and energy consumption increases.Existing result of study shows that directly original position removal method is owing to can not control the variation of soil system pH well, and treatment effeciency is often lower.Adsorption and desorption, precipitation and the dissolving of pH variable effect soil intermediate ion also influences electrodialysis speed, this can produce significant impact to exist form and migration feature of heavy metal in soil, thereby how to control P in soil H be one of key issue of the electronic reparation of soil.
The utility model content
The utility model has overcome above-mentioned shortcoming, can change physicochemical properties such as oxidation-reduction potential in the soil, pH value and provide a kind of, accelerate the desorb of heavy metal on the soil solid, and the concentration of heavy metal in the raising soil liquid, thereby the compound restoration of soil polluted by heavy metal device of electronic absorption plant of the absorption of fortification of plants and accumulation.
To achieve these goals, the utility model is to realize by the following technical solutions:
The compound restoration of soil polluted by heavy metal device of a kind of electric power absorption plant, it comprises anode region, cathodic region and power supply, it is characterized in that, it also comprises porous media dividing plate and porous media adsorbing material, be respectively charged into anode buffer solution and negative electrode cushioning liquid in described anode region and the cathodic region, and join with two poles respectively; Porous media dividing plate and porous media adsorbing material layer are set respectively on the opposite face of the opposite face in described anode region and cathodic region and cathodic region and anode region successively from inside to outside, between two porous media adsorbing material floor, are formed for repairing the reparation district of the heavy-metal contaminated soil of serike root system; Anode buffer solution and negative electrode cushioning liquid in described anode region and the cathodic region contact with porous media adsorbing material by the porous media dividing plate respectively.
Described power supply is the convertible power supply of polarity, makes the polarity in anode region and cathodic region adopt the method for switching electric polarity to be connected.
The hole of described porous media dividing plate is 0.01mm-1mm.
Described porous media adsorbing material layer is bamboo charcoal or active carbon.
The utility model is under the voltage dynamic action, near the soil liquid generation electrochemistry element reaction electrode, physicochemical properties such as the oxidation-reduction potential in the change soil, pH value, accelerate the desorb of heavy metal on the soil solid, improve the concentration of heavy metal in the soil liquid, thereby the absorption of fortification of plants, accumulation increase the diversity of micropopulation in the soil and vigor greatly, have increased the output of crop.
Description of drawings
Describe the utility model in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is the schematic diagram of the utility model restoration of soil polluted by heavy metal.
The specific embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with the specific embodiment, further set forth the utility model.
With reference to figure 1: the compound restoration of soil polluted by heavy metal device of a kind of electric power absorption plant, it comprises anode region 3, cathodic region 4 and power supply 5, it also comprises porous media dividing plate 1,1a and porous media adsorbing material 2,2a, be respectively charged into anode buffer solution and negative electrode cushioning liquid in anode region 3 and the cathodic region 4, in anode region 3, be inserted with anode 6, in cathodic region 4, be inserted with negative electrode 7, anode 6 and negative electrode 7 join with power supply 5 the two poles of the earth respectively, power supply 5 is the convertible power supply of polarity, makes the polarity in anode region 3 and cathodic region 4 adopt the method for switching electric polarity to be connected; On relative that face 11 in anode region 3 and cathodic region 4, set gradually porous media dividing plate 1 and porous media adsorbing material layer 2 from inside to outside, on relative that face 12 of cathodic region 4 and anode region 3, set gradually porous media dividing plate 1a and porous media adsorbing material layer 2a from inside to outside, between porous media adsorbing material floor 2,2a, be formed for repairing the reparation district 9 of the heavy-metal contaminated soil of serike root system 8; Anode buffer solution and negative electrode cushioning liquid in anode region 3 and the cathodic region 4 contact with porous media adsorbing material layer 2,2a by porous media dividing plate 1,1a respectively, the hole of porous media dividing plate 1,1a is 0.01mm-1mm, and porous media adsorbing material layer 2,2a are bamboo charcoal or active carbon.
The utility model adopts graphite to be connected with the two ends of negative electrode 7 with power supply 5 as anode 6 respectively, insert in anode region 3 and the cathodic region 4, in anode region 3 and cathodic region 4, store anode buffer liquid and negative electrode buffer solution respectively, the utility model as shown in Figure 1, to the cathodic region 4, set gradually the porous media adsorbing material floor 2a and the porous media dividing plate 1a of the porous media adsorbing material floor 2 of porous media dividing plate 1, absorption metal, the reparation district 9 that needs the heavy-metal contaminated soil handled, serike root system 8, absorption heavy metal by anode region 3.
Under electrodynamic effect, heavy metal ion in the soil is by cathodic region 4 polar region 3 migrations on the sunny side, heavy metal ion is accumulated near soil surface and the serike root system so that repair, prevent that it from entering the depth of soils, adopt porous media dividing plate 1,1a further to prevent the polluted heavy metals ions diffusion, in order to prevent that cathodic region 4pH value from rising and the decline of anode region 3pH value, thus in the anode region 3 and cathodic region 4 utilized the adjusting that circulates of anode buffer liquid and negative electrode buffer solution respectively.Following electrode reaction can take place in electronic repair process:
Anode: 2H 2O-4e-→ O 2+ 4H+E0=-1.23V
Negative electrode: 2H 2O+2e-→ H 2+ 2OH-E0=-0.83V
Because the pH value changed near the electrolysis of water caused electrode, wherein anode 6 produces H +And making anode region 3 present acidity (the pH value may be reduced to about 2), negative electrode 7 produces OH -And make cathodic region 4 present alkalescence (the pH value may rise to about 12), the H of while positively charged +To cathodic region 4 motions, electronegative OH - Polar region 3 motions have on the sunny side formed acid migration band and alkalescence migration band respectively.
Soil or the underground water zone that is subjected to heavy metal pollution inserted in the utility model anode region 3 and cathodic region 4, under electrodynamic effect, heavy metal ion in the soil such as copper ion Cu 2+, zinc ion Zn 2+With arsenic ion As 3+By cathodic region 4 polar region 3 migrations on the sunny side, as bamboo carbon adsorption zone, each heavy metal ion is adsorbed and removes at porous media adsorbing material layer 2 in heavy metal; Adopting the effect of porous media dividing plate 1,1a is by porous media dividing plate 1,1a, the anode buffer weak solution contacts with porous media adsorbing material layer 2,2a respectively with negative electrode buffering weak solution, regulate the pH value of porous media adsorbing material layer 2,2a, prevent the rising of cathodic region 4pH value and the decline of anode region 3pH value, and can isolate heavy metal ion adsorbed to electrode, the pore size of described porous media dividing plate is between the 0.01mm to 1mm, generally gets 0.07mm for best.Adopt the method for switching electric polarity to reach the purpose of regulating soil pH value in addition.Under electrodynamic effect, ion accumulates near soil surface and the rehabilitation plant root system so that repair.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (4)

1. electric power is adsorbed the compound restoration of soil polluted by heavy metal device of plant, it comprises anode region, cathodic region and power supply, it is characterized in that, it also comprises porous media dividing plate and porous media adsorbing material, install anode buffer solution and negative electrode cushioning liquid in described anode region and the cathodic region respectively, and join with two poles respectively; Be provided with porous media dividing plate and porous media adsorbing material layer on the opposite face of the opposite face in described anode region and cathodic region and cathodic region and anode region respectively successively from inside to outside, between two porous media adsorbing material floor, be formed for repairing the reparation district of the heavy-metal contaminated soil of serike root system.
2. the compound restoration of soil polluted by heavy metal device of electric power absorption plant according to claim 1 is characterized in that described power supply is the convertible power supply of polarity.
3. the compound restoration of soil polluted by heavy metal device of electric power absorption plant according to claim 1 is characterized in that the hole of described porous media dividing plate is 0.01mm-1mm.
4. the compound restoration of soil polluted by heavy metal device of electric power absorption plant according to claim 1 is characterized in that described porous media adsorbing material layer is bamboo charcoal or active carbon.
CN2009200735835U 2009-06-09 2009-06-09 Heavy metal polluted soil electrokinetic adsorbing and compounding remediation device for plants Expired - Fee Related CN201454978U (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102806228A (en) * 2012-08-08 2012-12-05 重庆大学 Contaminated soil ex-situ electrokinetic remediation device and method thereof
CN103480645A (en) * 2013-09-30 2014-01-01 苏州绿地土壤修复科技有限公司 Injection device for in situ chemical soil remediation and distributing system thereof
CN103736719A (en) * 2014-01-02 2014-04-23 重庆绿色智能技术研究院 In-situ self-sustaining contaminated soil restoring device based on plant bionics and method
CN103975788A (en) * 2014-04-24 2014-08-13 浙江工商大学 Microbial fuel cell bonsai and method for in-situ hexavalent chromium-polluted soil remediation
CN104368592A (en) * 2014-09-01 2015-02-25 华北电力大学 Periodic composite repair method of arsenic polluted soil
CN104785505A (en) * 2015-04-29 2015-07-22 重庆大学 Method for removing heavy metals in municipal solid waste incineration fly ash
CN105312308A (en) * 2014-07-24 2016-02-10 台境企业股份有限公司 Electrokinetic soil treatment device
CN107900092A (en) * 2017-10-30 2018-04-13 常州大学 A kind of arid area lead cadmium pollution soil repair system
CN108262353A (en) * 2018-03-31 2018-07-10 天津大学 A kind of plant biological electrochemical in-situ restorative procedure by plant driving mass transfer
CN110695079A (en) * 2019-10-23 2020-01-17 常熟理工学院 Method for removing mercury in soil polluted by bottom mercury by using electric restoration coupled plant extraction technology
CN116060436A (en) * 2023-03-23 2023-05-05 哈尔滨工业大学 Electroosmosis-wicking fabric-plant combined treatment system and method for heavy metal contaminated soil

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102806228A (en) * 2012-08-08 2012-12-05 重庆大学 Contaminated soil ex-situ electrokinetic remediation device and method thereof
CN103480645A (en) * 2013-09-30 2014-01-01 苏州绿地土壤修复科技有限公司 Injection device for in situ chemical soil remediation and distributing system thereof
CN103736719A (en) * 2014-01-02 2014-04-23 重庆绿色智能技术研究院 In-situ self-sustaining contaminated soil restoring device based on plant bionics and method
CN103736719B (en) * 2014-01-02 2016-09-07 中国科学院重庆绿色智能技术研究院 The most self-holding prosthetic device of contaminated soil based on plant bionic and method
CN103975788A (en) * 2014-04-24 2014-08-13 浙江工商大学 Microbial fuel cell bonsai and method for in-situ hexavalent chromium-polluted soil remediation
CN103975788B (en) * 2014-04-24 2016-01-20 浙江工商大学 Potted plant and the method for the microbiological fuel cell of in-situ immobilization is polluted for soil Cr
CN105312308B (en) * 2014-07-24 2018-04-10 台境企业股份有限公司 Electric power land forming device
CN105312308A (en) * 2014-07-24 2016-02-10 台境企业股份有限公司 Electrokinetic soil treatment device
CN104368592B (en) * 2014-09-01 2016-06-15 华北电力大学 A kind of As polluted soil becomes periodically complex repairation method
CN104368592A (en) * 2014-09-01 2015-02-25 华北电力大学 Periodic composite repair method of arsenic polluted soil
CN104785505A (en) * 2015-04-29 2015-07-22 重庆大学 Method for removing heavy metals in municipal solid waste incineration fly ash
CN107900092A (en) * 2017-10-30 2018-04-13 常州大学 A kind of arid area lead cadmium pollution soil repair system
CN108262353A (en) * 2018-03-31 2018-07-10 天津大学 A kind of plant biological electrochemical in-situ restorative procedure by plant driving mass transfer
CN110695079A (en) * 2019-10-23 2020-01-17 常熟理工学院 Method for removing mercury in soil polluted by bottom mercury by using electric restoration coupled plant extraction technology
CN110695079B (en) * 2019-10-23 2021-06-25 常熟理工学院 Method for removing mercury in soil polluted by bottom mercury by using electric restoration coupled plant extraction technology
CN116060436A (en) * 2023-03-23 2023-05-05 哈尔滨工业大学 Electroosmosis-wicking fabric-plant combined treatment system and method for heavy metal contaminated soil
CN116060436B (en) * 2023-03-23 2023-08-15 哈尔滨工业大学 Electroosmosis-wicking fabric-plant combined treatment system and method for heavy metal contaminated soil

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Granted publication date: 20100512

Termination date: 20100609