CN205701842U - A kind of device utilizing Electroremediation contaminated soil - Google Patents
A kind of device utilizing Electroremediation contaminated soil Download PDFInfo
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- CN205701842U CN205701842U CN201620276762.9U CN201620276762U CN205701842U CN 205701842 U CN205701842 U CN 205701842U CN 201620276762 U CN201620276762 U CN 201620276762U CN 205701842 U CN205701842 U CN 205701842U
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Abstract
The utility model discloses a kind of device utilizing Electroremediation contaminated soil, belong to Waste Disposal Technology field.The device utilizing Electroremediation contaminated soil of the present utility model, its major part is the soil remediation reactor of the enclosure designs using regular polygon；Described soil remediation reactor is divided into anode electrolysis room, earth pillar room, catholyte chamber；Multiple anode electrolysis rooms are positioned at polygon vertex, and single catholyte chamber is positioned at center.Use the soil remediation reactor of regular polygon enclosure designs, because the electric field that orthohexagonal arrangement is formed is that inhomogeneous field can effectively strengthen inorganic ions migration in soil, be conducive to removing pollutant.And orthohexagonal being arranged in utilization on the spot can more effectively be covered with disposal field, improves the covering efficiency of device, it is achieved seamless coverage, does not omit any one local.
Description
Technical field
This utility model relates to a kind of device utilizing Electroremediation contaminated soil, belongs to Waste Disposal Technology field.
Background technology
In recent years, due to the sharp increase of population, the fast development of industry, substantial amounts of various types of pollutant are created.Solid waste is constantly stacked to soil surface and topples over, and harmful waste water constantly permeates in soil, and harmful gas and floating dust in air also constantly drop to, in soil, result in soil pollution with rainwater.These pollutant are constantly enriched with in vivo by food chain, have the biggest potential hazard to human health.
Soil pollutant can be divided mainly into heavy metal and Organic substance, has the features such as disguise, long-lasting and refractory organics, and the most very difficult conventional method processes.Biological restoration technique mainly utilizes the plant absorption soil pollution absorbing more by force pollutant ability, or utilize microbial degradation to purify soil, but heavy metal hyperaccumulative plant plant is short and small, Biomass is low, poor growth for major part, thus remediation efficiency is greatly affected, and it is difficult to do mechanization operation；The environmental condition to external world of microorganism simultaneously requires very strict, makes successfully to introduce a fine variety to be severely limited.The method of chemical redemption process contamination soil is also paid close attention to.Mainly by adding chemical redemption material and soil pollutant generation chemical reaction so that pollutant are degraded or toxicity reduces, such as chemical leaching technology, solution microwave leaching technology, chemical fastening techniques etc..But chemical redemption technique, often produces secondary pollution, and is only applicable to the soil that infiltration coefficient is higher.
DC electric field beneficiation technologies is utilized to have plurality of advantages compared with biological restoration technique, chemical redemption technique etc.: its polluter kind applicatory is quite varied；Saturated and unsaturation, stickiness and the soil of half stickiness can be applied to simultaneously, there is at a relatively high economic benefit；Can be used in combination with other technologies simultaneously；The property and structure of soil is endangered little, is not easily formed secondary pollution；It is more suitable for the compact substance soil etc. that comprehensive control infiltration coefficient is low.
Utility model content
In order to solve the problems referred to above, this utility model provides a kind of device utilizing Electroremediation contaminated soil.
The major part of described device is the soil remediation reactor of the enclosure designs using regular polygon；Described soil remediation reactor is divided into anode electrolysis room, earth pillar room, catholyte chamber；Multiple anode electrolysis rooms are positioned at polygon vertex, and single catholyte chamber is positioned at center.
In a kind of embodiment of the present utility model, described polygon is regular hexagon.
In a kind of embodiment of the present utility model, described anode electrolysis room and catholyte chamber are provided with electrode, are connected with the both positive and negative polarity of DC source respectively.
In a kind of embodiment of the present utility model, containing cone bottom described anode electrolysis room, catholyte chamber, the electrode chamber of device is facilitated to be safely tucked in soil.
In a kind of embodiment of the present utility model, described electrode uses the combination electrode that graphite and the mixing of Acidity of Aikalinity zeolite are constituted.
In a kind of embodiment of the present utility model, described electrode uses the form of non-uniform electrodes, arranges, can disassemble, be convenient for changing in the way of regular hexagon laying.
In a kind of embodiment of the present utility model, described device also includes DC source, peristaltic pump, electrolyte feed chamber, ion-exchange chamber, electrolyte mixing chamber, waste collection room.
In a kind of embodiment of the present utility model, described electrolyte feed chamber is connected with electrolyte mixing chamber by peristaltic pump；Described electrolyte mixing chamber is connected by peristaltic pump with catholyte chamber, anode electrolysis room, ion-exchange chamber respectively；Described catholyte chamber is connected by peristaltic pump with ion-exchange chamber.
In a kind of embodiment of the present utility model, described anode electrolysis room is connected with waste collection room.
In a kind of embodiment of the present utility model, described peristaltic pump is mechanical diaphragm type metering pump.
In a kind of embodiment of the present utility model, described ion-exchange chamber is contained within ion exchange material, for filtering the ion in the electrolyte sucked out from catholyte chamber.
In a kind of embodiment of the present utility model, being provided with 4 tunics inside described ion-exchange chamber, internal layer is filled with ion exchange resin.
In a kind of embodiment of the present utility model, described device also includes liquid collection chamber；With one layer of semipermeable membrane between catholyte chamber and liquid collection chamber, make metal ion can enter liquid collection chamber from catholyte chamber and cathode electrode room can not be re-introduced into from liquid collection chamber.
In a kind of embodiment of the present utility model, the electrolyte after described electrolyte mixing chamber will process through ion-exchange chamber mixes with the electrolyte in electrolyte feed chamber, is again introduced into catholyte chamber or anode electrolysis room, is circulated utilization.
The beneficial effects of the utility model:
(1) device utilizing Electroremediation contaminated soil of the present utility model uses the soil remediation reactor of regular polygon enclosure designs, because the electric field that orthohexagonal arrangement is formed is that inhomogeneous field can effectively strengthen inorganic ions migration in soil, be conducive to removing pollutant.And orthohexagonal being arranged in utilization on the spot can more effectively be covered with disposal field, improves the covering efficiency of device, it is achieved seamless coverage, does not omit any one local.
(2) what this utility model provided utilizes the device of Electroremediation contaminated soil when heavy metal in soil concentration is at 500mg/kg, voltage gradient is between 1.0-2.0V/cm, after running 360h, heavy metal in soil can be enriched to cathode chamber, and mobility reaches more than 85%.Therefore, this device can significantly improve the mobility of heavy metal, is a kind of effective assay device, has the biggest practical engineering application and be worth.
(3) device utilizing Electroremediation contaminated soil that this utility model provides can process and soil produces infringement, reduce its quality and use value, and can polluted surface water and subsoil water, any heavy metal/Organic substance that health and agricultural production are worked the mischief.More specifically refer to that density is more than 4.0g/cm3, produce the metallic element of toxicity and metalloid element when organism can be produced toxicity or excess, such as hydrargyrum, good fortune, lead, chromium, arsenic, copper, zinc, nickel, manganese etc., and persistent organism, organic poison.
Accompanying drawing explanation
Fig. 1 is the top view of soil remediation reactor；Wherein, 4 anode electrolysis rooms, 5 catholyte chamber；
Fig. 2 is a kind of embodiment of the device utilizing Electroremediation contaminated soil；1 DC source；2 mechanical diaphragm type metering pumps；3 electrolyte feed chamber；4 anode electrolysis rooms；5 catholyte chamber；6 electrodes；7 ion-exchange chamber；8 electrolyte mixing chambers；9 waste collection rooms；10 earth pillar rooms；11 soil remediation reactors；12 liquid collection chambers；
Fig. 3: the perspective view of soil remediation reactor；Wherein, 4 anode electrolysis room；5 catholyte chamber, 12 liquid collection chambers, 13 semipermeable membranes.
Detailed description of the invention
Embodiment 1: utilize the device of Electroremediation contaminated soil
The device utilizing Electroremediation contaminated soil of the present utility model, major part is the soil remediation reactor of the enclosure designs using regular polygon；Described soil remediation reactor is divided into anode electrolysis room, earth pillar room, catholyte chamber；Multiple anode electrolysis rooms are positioned at polygon vertex, and single catholyte chamber is positioned at center.Described anode electrolysis room and catholyte chamber are provided with electrode, are connected with the both positive and negative polarity of DC source respectively.Containing cone bottom described anode electrolysis room, catholyte chamber, the electrode chamber of device is facilitated to be safely tucked in soil.
Preferably, described polygon is regular hexagon.
Device of the present utility model can adjust processing area according to the size processing place, or processes in batches according to the size shape in place.
Embodiment 2: utilize the device of Electroremediation contaminated soil
As it is shown in figure 1, be a kind of building form of device of the present utility model, using hexagonal enclosure designs, six roots of sensation anode assembly composition regular hexagon, cathode assembly is in center.Comprise DC source 1, soil remediation reactor 11, ion-exchange chamber 7, electrolyte mixing chamber 8 and waste collection room 9；Described soil remediation reactor 11 is divided into anode electrolysis room 4, earth pillar room (10), catholyte chamber 5, pending soil is as in earth pillar room 10, equipped with electrolyte in anode chamber 4 and cathode chamber 5, and electrode 6 is set, both positive and negative polarity with DC source 1 is connected respectively, the soil in electrolyte infiltration earth pillar room 10.
Described ion-exchange chamber 7 is contained within ion exchange material, for filtering the ion in the electrolyte sucked out from catholyte chamber 5.Electrolyte after described electrolyte mixing chamber 8 will process through ion-exchange chamber 7 mixes with the electrolyte in electrolyte feed chamber 3, is again introduced into catholyte chamber 5 or anode electrolysis room 4, is circulated utilization.
Described electrolyte feed chamber 3 is connected with electrolyte mixing chamber 8 by mechanical diaphragm type metering pump 2；Described electrolyte mixing chamber 8 is connected by mechanical diaphragm type metering pump with catholyte chamber 5, anode electrolysis room 4, ion-exchange chamber 7 respectively；Described catholyte chamber 5 is connected by peristaltic pump with ion-exchange chamber 7.
Described device also includes liquid collection chamber 12；With one layer of semipermeable membrane 13 between catholyte chamber 5 and liquid collection chamber 12, make metal ion can enter liquid collection chamber from catholyte chamber and cathode electrode room can not be re-introduced into from liquid collection chamber.
Embodiment 3: the application of device of the present utility model
As experimental provision identical in above-described embodiment 2 has carried out Cr and luxuriant and rich with fragrance enrichment experiment to identical Cr-phenanthrene combined contamination soil.
Experiment soil is cohesive soil.Soil sampling, air-dries levigate, stores stand-by after crossing 2mm sieve.Weigh a certain amount of potassium dichromate and phenanthrene, be dissolved in deionized water and acetone respectively, join in pedotheque, be sufficiently stirred for mixing, be subsequently placed in glass container and at room temperature cultivate 15d.Through measuring, in this confession examination pedotheque, Cr and luxuriant and rich with fragrance concentration are about 500mg/kg, and moisture content is 16.5%.
Electric power enrichment experiment operating procedure: before experiment starts, first in earth pillar room, add NaCl solution, then will slowly inject earth pillar room for examination soil sample, be sufficiently mixed (soil ratio is 1:2) with the bubble removing in soil in NaCl solution, it is to avoid increase resistance.Anode and cathode liquid is distilled water, makes anode liquid level, supplies examination soil and negative electrode liquid level at sustained height, opens peristaltic pump, be passed through distilled water in the anode chamber and the cathode chamber, run 24h, and the soil liquid making earth pillar indoor reaches saturation.Then being initially powered up, two voltage across poles perseverances are 114V (i.e. potential gradient is 2V/cm).After examination soil treatment 360h, close power supply, take out the soil sample in each region from reaction unit and air-dry to constant weight under greenhouse, it is then ground to fine particle, cross 2mm sieve and store stand-by, measure the concentration of Cr in soil with micro-wave digestion-atomic absorption spectrophotometry again, use the concentration that ultrasonic extraction-Soil by HPLC is Sino-Philippines.
Result shows: experiment terminates the pH of rear soil between 3.0-9.8 (from anode region to cathode chamber), and electric osmose flow ranges up to 590mL；Luxuriant and rich with fragrance it is progressively enriched with cathode zone from anode region, wherein 1#、2#The mobility of sample point phenanthrene respectively reaches 49.4% and 38.5%, 3#、4#The Sino-Philippines mobility of soil be gradually lowered, and 5#Content luxuriant and rich with fragrance at sampling is up to 985mg/kg.Contrary heavy metal Cr migrates from cathode chamber toward anode region with the form of oxyacid radical ion, and wherein 4#、5#The mobility of sample point Cr (VI) respectively reaches 65.7% and 58.2%, 2#、3#Soil in the mobility of Cr (VI) be gradually lowered, and 1#At sampling, the content of Cr (VI) is up to 847mg/kg.This illustrates that this soil restoring device can be used to remediating heavy metal and organic compound contaminated soil, and by the enriching pollutants a certain district in soil.
Embodiment 4: the application of device of the present utility model
Experimental provision as identical in above-described embodiment 2 has carried out enrichment experiment to identical combined contamination soil, is to add 10 times of cmc Dowfax8390 anion surfactants as electrolysis control liquid toward the two poles of the earth tank house in place of difference.
Electric power enrichment experiment operating procedure is slightly different with the operation in embodiment 1.Before experiment starts, first in earth pillar room, add NaCl solution, then will slowly inject earth pillar room for examination soil sample, and be sufficiently mixed (soil ratio is 1:2) with the bubble removing in soil in NaCl solution, it is to avoid increase resistance.Anode and cathode liquid is distilled water, makes anode liquid level, supplies examination soil and negative electrode liquid level at sustained height, opens dosing pump, be passed through distilled water in the anode chamber and the cathode chamber, runs 24h, and the soil liquid of earth pillar indoor reaches saturation.Then being initially powered up, two voltage across poles perseverances are 114V (i.e. potential gradient is 2V/cm).When experiment starts, it is passed through electrolyte to the anode chamber and the cathode chamber and is distilled water, when reaction unit runs 12h, start in cathode chamber, be passed through 10 times of cmc Dowfax8390 solution, 360h always it is processed as examination soil, close power supply afterwards, take out the soil sample in each region from each thief hatch of reaction unit and air-dry to constant weight under greenhouse, it is then ground to fine particle, cross 200mm sieve and store stand-by, measure the concentration of Cr in soil with micro-wave digestion-atomic absorption spectrophotometry again, use the concentration that ultrasonic extraction-Soil by HPLC is Sino-Philippines.
Result shows: experiment terminates the pH of rear soil between 2.7-8.9 (from anode region to cathode chamber), and electric osmose flow ranges up to 640mL；Luxuriant and rich with fragrance it is progressively enriched with cathode zone from anode region, wherein 1#、2#The mobility of sample point phenanthrene respectively reaches 60.4% and 57.5%, 3#、4#The Sino-Philippines mobility of soil be gradually lowered, and 5#Content luxuriant and rich with fragrance at sampling is up to 805mg/kg.Contrary heavy metal Cr migrates from cathode chamber toward anode region with the form of oxyacid radical ion, and wherein 4#、5#The mobility of sample point Cr (VI) respectively reaches 85.7% and 81.2%, 2#、3#Soil in the mobility of Cr (VI) be gradually lowered, and 1#At sampling, the content of Cr (VI) is up to 702mg/kg.After this illustrates to add surfactant D owfax8390 in electrolyte, it is possible to promote pollutant migration in soil, improve the remediation efficiency of pollutant.
Although this utility model is open as above with preferred embodiment; but it is not limited to this utility model; any person skilled in the art; without departing from spirit and scope of the present utility model; all can do various changes and modification, protection domain the most of the present utility model should be with being as the criterion that claims are defined.
Claims (9)
1. the device utilizing Electroremediation contaminated soil, it is characterised in that the major part of described device is the soil remediation reactor of the enclosure designs using regular polygon；Described soil remediation reactor is divided into anode electrolysis room, earth pillar room, catholyte chamber；Multiple anode electrolysis rooms are positioned at polygon vertex, and single catholyte chamber is positioned at center.
The device utilizing Electroremediation contaminated soil the most according to claim 1, it is characterised in that containing cone bottom described anode electrolysis room, catholyte chamber, facilitate the electrode chamber of device to be safely tucked in soil.
The device utilizing Electroremediation contaminated soil the most according to claim 1, it is characterised in that described device also includes DC source, peristaltic pump, electrolyte feed chamber, ion-exchange chamber, electrolyte mixing chamber, waste collection room.
The device utilizing Electroremediation contaminated soil the most according to claim 3, it is characterised in that described electrolyte feed chamber is connected with electrolyte mixing chamber by peristaltic pump；Described electrolyte mixing chamber is connected by peristaltic pump with catholyte chamber, anode electrolysis room, ion-exchange chamber respectively；Described catholyte chamber is connected by peristaltic pump with ion-exchange chamber.
The device utilizing Electroremediation contaminated soil the most according to claim 1, it is characterised in that also include liquid collection chamber in described device；With one layer of semipermeable membrane between catholyte chamber and liquid collection chamber.
The device utilizing Electroremediation contaminated soil the most according to claim 1, it is characterised in that described polygon is regular hexagon.
The device utilizing Electroremediation contaminated soil the most according to claim 1, it is characterised in that be provided with electrode in described anode electrolysis room and catholyte chamber, be connected with the both positive and negative polarity of DC source respectively.
The device utilizing Electroremediation contaminated soil the most according to claim 1, it is characterised in that described anode electrolysis room is connected with waste collection room.
The device utilizing Electroremediation contaminated soil the most according to claim 1, it is characterised in that also include liquid collection chamber in described device；With one layer of semipermeable membrane between catholyte chamber and liquid collection chamber, make metal ion can enter liquid collection chamber from catholyte chamber and cathode electrode room can not be re-introduced into from liquid collection chamber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620276762.9U CN205701842U (en) | 2016-04-05 | 2016-04-05 | A kind of device utilizing Electroremediation contaminated soil |
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| CN201620276762.9U CN205701842U (en) | 2016-04-05 | 2016-04-05 | A kind of device utilizing Electroremediation contaminated soil |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665437A (en) * | 2016-04-05 | 2016-06-15 | 江南大学 | Device for repairing polluted soil by using electric power |
| CN108326030A (en) * | 2018-01-11 | 2018-07-27 | 上海理工大学 | The heavy metal-polluted soil prosthetic device of convertible array-type electrode |
| CN114192563A (en) * | 2021-11-25 | 2022-03-18 | 厦门大学 | In-situ remediation method for low-permeability polycyclic aromatic hydrocarbon contaminated soil |
| CN114367533A (en) * | 2022-01-18 | 2022-04-19 | 陕西省土地工程建设集团有限责任公司 | Soil remediation system and method |
-
2016
- 2016-04-05 CN CN201620276762.9U patent/CN205701842U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665437A (en) * | 2016-04-05 | 2016-06-15 | 江南大学 | Device for repairing polluted soil by using electric power |
| CN105665437B (en) * | 2016-04-05 | 2019-07-23 | 江南大学 | A kind of device using Electroremediation contaminated soil |
| CN108326030A (en) * | 2018-01-11 | 2018-07-27 | 上海理工大学 | The heavy metal-polluted soil prosthetic device of convertible array-type electrode |
| CN108326030B (en) * | 2018-01-11 | 2020-11-24 | 上海理工大学 | Soil heavy metal prosthetic devices of convertible array electrode |
| CN114192563A (en) * | 2021-11-25 | 2022-03-18 | 厦门大学 | In-situ remediation method for low-permeability polycyclic aromatic hydrocarbon contaminated soil |
| CN114367533A (en) * | 2022-01-18 | 2022-04-19 | 陕西省土地工程建设集团有限责任公司 | Soil remediation system and method |
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Granted publication date: 20161123 Termination date: 20170405 |
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