CN109926447A - A variety of contaminated soil advanced oxidation collaboration electrodynamics in-situ remediation systems and method - Google Patents
A variety of contaminated soil advanced oxidation collaboration electrodynamics in-situ remediation systems and method Download PDFInfo
- Publication number
- CN109926447A CN109926447A CN201910294718.9A CN201910294718A CN109926447A CN 109926447 A CN109926447 A CN 109926447A CN 201910294718 A CN201910294718 A CN 201910294718A CN 109926447 A CN109926447 A CN 109926447A
- Authority
- CN
- China
- Prior art keywords
- soil
- advanced oxidation
- clapboard
- electrodynamics
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002689 soil Substances 0.000 title claims abstract description 148
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 58
- 230000003647 oxidation Effects 0.000 title claims abstract description 56
- 238000005067 remediation Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 22
- 230000005520 electrodynamics Effects 0.000 title claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000010439 graphite Substances 0.000 claims abstract description 22
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 22
- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000008439 repair process Effects 0.000 claims abstract description 9
- 229910001385 heavy metal Inorganic materials 0.000 claims description 32
- 239000003792 electrolyte Substances 0.000 claims description 23
- 239000004744 fabric Substances 0.000 claims description 17
- 150000002500 ions Chemical class 0.000 claims description 14
- 238000003918 potentiometric titration Methods 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 13
- -1 hydroxyl radical free radical Chemical class 0.000 claims description 12
- 230000005012 migration Effects 0.000 claims description 11
- 238000013508 migration Methods 0.000 claims description 11
- 239000011521 glass Substances 0.000 claims description 9
- 231100000419 toxicity Toxicity 0.000 claims description 8
- 230000001988 toxicity Effects 0.000 claims description 8
- 230000001590 oxidative effect Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 5
- 230000005684 electric field Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000007800 oxidant agent Substances 0.000 claims description 5
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims description 5
- 238000000354 decomposition reaction Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 238000005370 electroosmosis Methods 0.000 claims description 4
- 238000001962 electrophoresis Methods 0.000 claims description 4
- 238000006555 catalytic reaction Methods 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 238000003421 catalytic decomposition reaction Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000011049 filling Methods 0.000 claims description 2
- 230000010534 mechanism of action Effects 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 231100000331 toxic Toxicity 0.000 claims description 2
- 230000002588 toxic effect Effects 0.000 claims description 2
- 238000001727 in vivo Methods 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 abstract description 6
- 231100000719 pollutant Toxicity 0.000 abstract description 6
- 238000009510 drug design Methods 0.000 abstract description 2
- 239000000356 contaminant Substances 0.000 abstract 1
- 229910052785 arsenic Inorganic materials 0.000 description 6
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 6
- 229910052793 cadmium Inorganic materials 0.000 description 6
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000033116 oxidation-reduction process Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 150000003254 radicals Chemical class 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229910052500 inorganic mineral Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011707 mineral Chemical class 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000007646 directional migration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- WBZKQQHYRPRKNJ-UHFFFAOYSA-L disulfite Chemical compound [O-]S(=O)S([O-])(=O)=O WBZKQQHYRPRKNJ-UHFFFAOYSA-L 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000004968 peroxymonosulfuric acids Chemical class 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000003802 soil pollutant Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 210000000952 spleen Anatomy 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
A variety of contaminated soil advanced oxidations cooperate with electrodynamics in-situ remediation system, including D.C. regulated power supply and soil restoring device, soil restoring device includes cabinet and advanced oxidation agent administration device, left clapboard and right clapboard are provided in cabinet, box house is successively divided into anode chamber, soil chamber and cathode chamber by left clapboard and right clapboard from left to right, several open-works are offered on left clapboard and right clapboard, cabinet front lower part is provided with left bank water valve and right drain valve, and D.C. regulated power supply is connect with the upper end of two column graphite electrodes respectively by conducting wire.The invention also discloses the restorative procedures of a variety of contaminated soil advanced oxidations collaboration electrodynamics in-situ remediation system.The present invention has rational design, structure is simple, and soil in-situ repair process is convenient for operation, and contaminant removal efficiency is high, and pollutant removal is thorough, does not need that pollutant is further processed again.
Description
Technical field
The invention belongs to technical field of soil remediation, and in particular to one kind of multiple contaminated soil advanced oxidations cooperate with electric power
Learn in-situ remediation system and method.
Background technique
China is as maximum electronic product production and consumption state in the world, and electronic product is in its production and removal process
Due to the operation or processing mode of violation, it will cause heavy metal and pass through rainwash, atmospheric sedimentation, solid waste accumulation, sewage discharge
Etc. modes enter soil, heavy metal pollution of soil has many characteristics, such as complicated component, pollution persistence, refractory organics, high toxicity, right
People's lives influence great.
Electro reclamation is that a kind of emerging soil in-situ repair mode is passed through by imposing DC electric field to contaminated soil
The modes such as electromigration, electroosmotic flow, electrophoresis by soil pollutant directional migration and removal, to achieve the purpose that rehabilitating soil.
Electro reclamation has the advantages that removal efficiency is high, applicability is wide, without secondary pollution, rehabilitation cost is low etc., at home and abroad obtains very wide
The approval and application of model.
Chinese patent literature " soil repair system and its soil remediation method " (notification number CN105583220A) discloses
Enter thermal desorption furnace after a kind of cracking and sorting by contaminated soil and the pollutant in soil is pyrolyzed desorption, is recycled volatility gas
Make the method for soil backfill up to standard after body.This method can change the physicochemical property of soil, lose the nutrient of soil largely, and
Heat consumption is big in repair process, and energy loss is serious.
High-level oxidation technology is different from general chemistry oxidation and repairs, and can decompose generation with high using advanced oxidation agent
The hydroxyl radical free radical (OH, 2.8eV) and potentiometric titrations (SO of oxidation-reduction potential4 -, 3.0eV) etc., oxidability
It is high, chain reaction can quickly occur with most organic pollutants, harmful substance is oxidized to CO by no selection2、H2O
Or mineral salt, it is without secondary pollution.The huge sum of money in soil can be effectively removed with high-level oxidation technology collaboration electromotion repairing technique
Belong to the fractions distribution for polluting and changing its heavy metal, to have the function that soil remediation.
A kind of Chinese patent literature " electronic-microbial association restorative procedure of heavy-metal contaminated soil " (notification number
CN104801537A a kind of electronic and microbial association restorative procedure of heavy-metal contaminated soil) is disclosed, pre-selection is specific micro-
Heavy metal of the biological inoculum in the activating soil after culture tolerance domestication is migrating a removal huge sum of money with electromotion repairing technique
Belong to, the method to reach repairing polluted soil.This method excessively relies on the activation to heavy metal of strain, and the tolerance of strain is tamed and dociled
Change process uncertain factor is excessive, is influenced by factors such as temperature, humidity, pH and screening techniques, and process is complicated, and the time is unrestrained
Long, artificial operability is low, and compared with its repairing effect of general electro reclamation without substantially changing.
Summary of the invention
The present invention in order to solve shortcoming in the prior art, provide it is a kind of it is economical and practical, convenient for operation, reliability
High, removal efficiency is good a variety of contaminated soil advanced oxidations collaboration electrodynamics in-situ remediation system and method.
In order to solve the above technical problems, the present invention adopts the following technical scheme: a variety of contaminated soil advanced oxidations collaboration electricity
Dynamics in-situ remediation system, including D.C. regulated power supply and soil restoring device, soil restoring device include cabinet and advanced
Oxidant administration device, cabinet are in rectangular shape, are provided with left clapboard and right clapboard in cabinet, and left clapboard and right clapboard are by case
Internal portion is successively divided into anode chamber, soil chamber and cathode chamber from left to right, offers several on left clapboard and right clapboard
Open-work, cabinet front lower part are provided with left bank water valve and right drain valve, left bank water valve and right drain valve respectively with anode chamber and yin
Pole room connection, the equal level in the top of anode chamber and the top of cathode chamber are fixed with one piece of mounting plate, open on every piece of mounting plate
Equipped with graphite electrode fixation hole and electrolyte sampling hole；Soil to be repaired, advanced oxidation agent dispensing dress are filled in soil chamber
It sets and is inserted into soil to be repaired, the indoor graphite electrode fixation hole of anode and the indoor graphite electrode fixation hole of cathode are all provided with
It is equipped with a column graphite electrode, D.C. regulated power supply is connect with the upper end of two column graphite electrodes respectively by conducting wire.
Cabinet is that poly (methyl methacrylate) plate is made, and the overall dimension length × width × height of cabinet is 40 × 10 × 15cm, Anodic
The size of room and cathode chamber is 10 × 10 × 15cm, and the size of soil chamber is 20 × 10 × 15cm.
Advanced oxidation administration device includes two pieces of clamping plates in rectangular configuration, is provided between two clamping plates and is enclosed with height
The filter cloth of grade oxidant offers several through-holes on two clamping plates, and through-hole diameter 5mm, the edge of two clamping plates is not by
Rust steel screw is connected to one, and two clamping plates are between left clapboard and right clapboard.
The right side of left clapboard, the left side of right clapboard, the bottom surface of cabinet and front and back sides are laid in the inner wall of soil chamber
There is the glass fabric of 300 mesh.
The restorative procedure of a variety of contaminated soil advanced oxidation collaboration electrodynamics in-situ remediation systems, includes the following steps,
(1) a certain amount of various heavy contaminated liquid is prepared, soil is uniformly spilled by gondola water faucet, is stirred evenly, ageing is for 24 hours
It is spare；
(2) glass fabric into one layer of 300 mesh is spread in soil chamber, then is inserted vertically into advanced oxidation administration device, to soil
The heavy-metal contaminated soil that indoor filling has been aged, compacting are paved, and are sampled with sampler to set sampling point, then be compacted spread
It is flat, while guaranteeing that the height Yu soil height of filter cloth internal oxidition agent in advanced oxidation administration device maintain an equal level；
(3) KCl solution, the liquid level of KCl solution are injected into anode chamber and cathode chamber by the electrolyte sampling hole on mounting plate
Height is slightly below soil height, and electrolyte is avoided not have soil；
(4) D.C. regulated power supply positive and negative anodes are picked out with conducting wire, are separately connected the upper end of two column graphite electrodes, and adjustment power supply is
Voltage and repair time are repaired in potentiostatic mode, setting, start soil remediation；
(5), it with the progress of reparation, can be sampled at any time using sampler, measure the content of heavy metal in soil after soil remediation,
Until meeting the standard value in national standard of soil environment quality.
The purity of column graphite electrode is 99.9%, and electric conductivity is good, and electrolyte is the KCl solution of 0.1mol/L.
To the advanced oxidation reaction cardinal principle occurred in the soil during soil remediation in step (4) are as follows:
The work of oxygenolysis is played in advanced oxidation agent to the heavy metal ion of the variforms such as organic, exchangeable species in soil
With；
Persulfate produces hydroxyl radical free radical and potentiometric titrations with strong oxidizing property, but mistake under the action of electro-catalysis
Sulfate electro reclamation occur it is thermocatalytic under the influence of will affect the decomposition rate of release of persulfate, and need to adjust electricity
Field intensity and soil pH value are to control the rate of release of hydroxyl radical free radical and potentiometric titrations；
With in various heavy contaminated soil, imposing DC electric field, in electric field there are electromigration, electro-osmosis, electrophoresis work
With electrodynamics is mainly electromigration to the removal of heavy metal ions in soil, if Cd (III) is under the action of electromigration
It being migrated from anode region to cathodic region, heavy metal ion displacement under the action of electromigration is rich in collection or removal a certain, with
Achieve the purpose that remove heavy metal in soil；And the mechanism of action of advanced oxidation agent is the hydroxyl radical free radical generated through catalytic decomposition
It can be, with heavy metal ion existing for organic, exchangeable species variform, to be gone back in oxygenolysis soil with potentiometric titrations
Highly toxic lower valency heavy metal ion can be oxidized to the heavy metal ion of hypotoxicity, or by the heavy metal of low migration rate from
Son is oxidized to the heavy metal ion of high migration rate, equally has the function that remove heavy metal-polluted soil or reduces toxicity；Such as: As
(III) toxicity is 60 times of As (V) toxicity, and hydroxyl radical free radical and potentiometric titrations can aoxidize the As (III) in soil
For As (V), the toxicity in soil is greatly reduced；For another example: the migration rate of Cr (VI) is 60 times of Cr (III) migration rate,
Cr (III) in soil is oxidized to Cr (VI) by hydroxyl radical free radical and potentiometric titrations, considerably increases the migration of Cr (VI)
Rate.
By adopting the above technical scheme, the present invention has following technical effect that
(1), advanced oxidation collaboration electrodynamics in-situ immobilization soil has the heavy metal of two or more in soil
The effect of good conversion degradation and migration removal, the heavy metal after advanced oxidation cooperates with electrodynamics in-situ immobilization in soil
Available good removal.
(2), the advanced oxidant such as persulfate can decomposite the hydroxyl with high oxidation-reduction potential by electro-catalysis
Base free radical (OH) and potentiometric titrations (SO4-) etc., OH is similar with the oxidation-reduction potential of SO4-, all exists
2.8eV or so, oxidability is high, and chain reaction, the handle of no selection can quickly occur with most organic pollutants
Harmful substance is oxidized to CO2、H2O or mineral salt, it is without secondary pollution.
(3) although, high-level oxidation technology there is good removal effect in soil remediation, traditional dosing mode need to be with
Soil is uniformly mixed, and is influenced to be not easy to realize by practical operation, advanced oxidation agent is easily gathered or be not easy in the soil to disperse, and causes
Soil entirety repairing effect is uneven, and advanced oxidation agent decomposes and generates hydroxyl radical free radical and potentiometric titrations need certain to swash
Clockwork spring part, high-level oxidation technology cooperate with use with electro reclamation, can both be made by electromigration, electroosmotic flow, electrophoresis etc. in soil
It is uniformly dispersed with the free radical for generating advanced oxidation agent, the decomposition that electrical environment keeps advanced oxidation agent continual and steady can also be provided.
So as to improve the effect of soil remediation.
(4), advanced oxidation agent administration device is equipped with the filter cloth of advanced oxidation agent using two clamping plates clamping, it is ensured that advanced
The continual and steady decomposition of oxidant opens up electrolyte sampling hole on mounting plate and avoids the heated a large amount of volatilizations of electrolyte.High-purity
Column graphite electrode provides good electric conductivity, avoids electrical loss, and left bank water valve and right drain valve facilitate experiment to repair knot
Shu Hou, collection and utilization to electrolyte.The present invention it is simple and practical, the property be transformed is strong, can change according to the actual situation device and
Details is repaired, is conveniently applied in practice.
(5), left clapboard and right clapboard ensure that the isolation of soil and electrolyte, and the laying of 300 mesh glass fabrics guarantees
Electrolyte adequately penetrates into contaminated soil, and avoids soil particle and penetrate into electrolyte.
In conclusion the present invention has rational design, structure is simple, soil in-situ repair process is convenient for operation, pollutant removal
High-efficient, pollutant removal is thorough, does not need that pollutant is further processed again.
Detailed description of the invention
Fig. 1 is that stereochemical structure of the invention uses figure；
Fig. 2 is the structural schematic diagram of advanced oxidation agent administration device；
Fig. 3 is the soil remediation result schematic diagram that do not add advanced oxidation agent and add advanced oxidation agent；
Fig. 4 is the schematic diagram that 12 sample points are arranged in soil chamber.
Specific embodiment
As depicted in figs. 1 and 2, a variety of contaminated soil advanced oxidations of the invention cooperate with electrodynamics in-situ remediation system,
Including D.C. regulated power supply and soil restoring device, soil restoring device includes cabinet 1 and advanced oxidation agent administration device, cabinet
1 is in rectangular shape, is provided with left clapboard 2 and right clapboard 3 in cabinet 1, left clapboard 2 and right clapboard 3 by inside cabinet 1 from left-hand
The right side is successively divided into anode chamber 4, soil chamber 5 and cathode chamber 6, offers several open-works, case on left clapboard 2 and right clapboard 3
1 lower front of body is provided with left bank water valve 7 and right drain valve 8, left bank water valve 7 and right drain valve 8 respectively with anode chamber 4 and cathode
Room 6 connects, and the equal level in top on the top and cathode chamber 6 of anode chamber 4 is fixed with one piece of mounting plate 9, on every piece of mounting plate 9
Offer graphite electrode fixation hole 10 and electrolyte sampling hole 11；Soil to be repaired, advanced oxidation agent are filled in soil chamber 5
Administration device is inserted into soil to be repaired, the graphite electrode in graphite electrode fixation hole 10 and cathode chamber 6 in anode chamber 4
Fixation hole 10 is provided with a column graphite electrode, D.C. regulated power supply by conducting wire respectively with two column graphite electrodes
Upper end connection.
Cabinet 1 is that poly (methyl methacrylate) plate is made, and the overall dimension length × width × height of cabinet 1 is 40 × 10 × 15cm, middle-jiao yang, function of the spleen and stomach
Pole room 4 and the size of cathode chamber 6 are 10 × 10 × 15cm, and the size of soil chamber 5 is 20 × 10 × 15cm.
Advanced oxidation administration device includes two pieces of clamping plates 12 in rectangular configuration, is provided with package between two clamping plates 12
There is the filter cloth of advanced oxidation agent, several through-holes 13 are offered on two clamping plates 12,13 diameter of through-hole is 5mm, two clamping plates 12
Edge be connected to one by stainless steel screw 14, two clamping plates 12 are between left clapboard 2 and right clapboard 3.
The inner wall of the right side of left clapboard 2, the left side of right clapboard 3, the bottom surface of cabinet 1 and front and back sides in soil chamber 5
It is equipped with the glass fabric of 300 mesh.
D.C. regulated power supply, column graphite electrode and glass fabric in the present invention do not illustrate in figure to be come.
It is set forth below and soil remediation is carried out using a variety of contaminated soil advanced oxidations collaboration electrodynamics in-situ remediation system
Specific embodiment:
It carries out two groups of experiments altogether to compare, first group is not added advanced oxidation agent, second group of addition advanced oxidation agent: persulfuric acid
Sodium, remaining is consistent.
The variation that each parameter in the soil of front and back is repaired for research, is arranged 12 sample points in soil chamber 5.As shown in figure 4,
Wherein distance of the sample point in X-direction away from origin O is respectively 1.0cm, 10.0cm, 19.0cm.Wherein TR is represented close to soil
The upper layer sample point (T1, T3, T5) of 5 front side of earth room, TL represent the upper layer sample point (T2, T4, T6) close to 5 rear side of soil chamber；
FR represents lower layer's sample point (F1, F3, F5) close to 5 front side of soil chamber, and FL represents lower layer's sample point close to 5 rear side of soil chamber
(F2, F4, F6).
First group of experimental procedure is as follows:
(1) 2000g soil is uniformly mixed with certain density arsenic, cadmium mixed solution, makes arsenic concentration 50mg/kg in soil,
Cadmium concentration is 500mg/kg；It is still aging spare for 24 hours；
(2) glass fabric into one layer of 300 mesh is spread in soil chamber 5, the heavy metal pollution being aged is inserted into soil chamber 5
Soil, compacting are paved, and are sampled with sampler to set sampling point, then be compacted pave, while guaranteeing advanced oxidation administration device
The height and soil height of interior filter cloth internal oxidition agent maintain an equal level；
(3) the KCl electrolyte of 0.1mol/L is added by the electrolyte sampling hole 11 in left side and the electrolyte sampling hole 11 on right side
It adds in anode chamber 4 and cathode chamber 6, waits electrolyte and soil after evenly mixing, start D.C. regulated power supply, be in voltage
It is run three days under conditions of 30V；
(4) after end of run, each sample point takes a certain amount of soil, clears up after drying, sample quarterlies, then use atomic fluorescence
Spectrometer and atomic absorption spectrophotometer are measured the content of arsenic and cadmium；Final result is as shown in Figure 3.
Second group of experimental procedure is as follows:
(1) 2000g soil is uniformly mixed with certain density arsenic, cadmium mixed solution, makes arsenic concentration 50mg/kg in soil,
Cadmium concentration is 500mg/kg.It is still aging spare for 24 hours；
(2) glass fabric into one layer of 300 mesh is spread in soil chamber 5, then be inserted vertically into advanced oxidation administration device, advanced oxygen
Change and is coated with metabisulfite solution on the filter cloth in dispensing；
(3) contaminated soil that ageing is completed is filled in soil chamber 5, compacting is paved, and guarantees soil height and dispensing height phase
Closely.
(4) the KCl electrolyte of 0.1mol/L is passed through into the electrolyte sampling hole 11 in left side and the electrolyte sampling hole on right side
11 are added in anode chamber 4 and cathode chamber 6, wait electrolyte and soil after evenly mixing, start D.C. regulated power supply, in voltage
To be run three days under conditions of 30V.
(5) after end of run, each sample point takes a certain amount of soil, clears up after drying, sample quarterlies, then use atom
Fluorescence Spectrometer and atomic absorption spectrophotometer are measured the content of arsenic and cadmium.Final result is as shown in Figure 3.
The present embodiment not makes any form of restriction shape of the invention, material, structure etc., all according to this hair
Bright technical spirit any simple modification, equivalent change and modification to the above embodiments, belong to the technology of the present invention side
The protection scope of case.
Claims (7)
1. more than kinds of contaminated soil advanced oxidation cooperates with electrodynamics in-situ remediation system, it is characterised in that: including DC voltage-stabilizing electricity
Source and soil restoring device, soil restoring device include cabinet and advanced oxidation agent administration device, and cabinet is in rectangular shape, case
It is provided with left clapboard and right clapboard in vivo, box house is successively divided into anode chamber, soil by left clapboard and right clapboard from left to right
Offer several open-works on earth room and cathode chamber, left clapboard and right clapboard, cabinet front lower part be provided with left bank water valve and
Right drain valve, left bank water valve and right drain valve are connect with anode chamber and cathode chamber respectively, the top of anode chamber and cathode chamber it is upper
The equal level in portion is fixed with one piece of mounting plate, offers graphite electrode fixation hole and electrolyte sampling hole on every piece of mounting plate；
Soil to be repaired is filled in soil chamber, advanced oxidation agent administration device is inserted into soil to be repaired, and anode is indoor
Graphite electrode fixation hole and the indoor graphite electrode fixation hole of cathode are provided with a column graphite electrode, D.C. regulated power supply
It is connect respectively with the upper end of two column graphite electrodes by conducting wire.
2. a variety of contaminated soil advanced oxidations according to claim 1 cooperate with electrodynamics in-situ remediation system, feature
Be: cabinet is that poly (methyl methacrylate) plate is made, and the overall dimension length × width × height of cabinet is 40 × 10 × 15cm, wherein anode chamber and
The size of cathode chamber is 10 × 10 × 15cm, and the size of soil chamber is 20 × 10 × 15cm.
3. a variety of contaminated soil advanced oxidations according to claim 2 cooperate with electrodynamics in-situ remediation system, feature
Be: advanced oxidation administration device includes two pieces of clamping plates in rectangular configuration, be provided between two clamping plates be enclosed with it is advanced
The filter cloth of oxidant, several through-holes, through-hole diameter 5mm are offered on two clamping plates, and the edge of two clamping plates passes through stainless
Steel screw is connected to one, and two clamping plates are between left clapboard and right clapboard.
4. a variety of contaminated soil advanced oxidations according to claim 3 cooperate with electrodynamics in-situ remediation system, feature
Be: the right side of left clapboard, the left side of right clapboard, the bottom surface of cabinet and front and back sides are equipped in the inner wall of soil chamber
The glass fabric of 300 mesh.
5. the reparation side of a variety of contaminated soil advanced oxidation collaboration electrodynamics in-situ remediation systems as claimed in claim 4
Method, it is characterised in that: include the following steps,
(1) a certain amount of various heavy contaminated liquid is prepared, soil is uniformly spilled by gondola water faucet, is stirred evenly, ageing is for 24 hours
It is spare；
(2) glass fabric into one layer of 300 mesh is spread in soil chamber, then is inserted vertically into advanced oxidation administration device, to soil
The heavy-metal contaminated soil that indoor filling has been aged, compacting are paved, and are sampled with sampler to set sampling point, then be compacted spread
It is flat, while guaranteeing that the height Yu soil height of filter cloth internal oxidition agent in advanced oxidation administration device maintain an equal level；
(3) KCl solution, the liquid level of KCl solution are injected into anode chamber and cathode chamber by the electrolyte sampling hole on mounting plate
Height is slightly below soil height, and electrolyte is avoided not have soil；
(4) D.C. regulated power supply positive and negative anodes are picked out with conducting wire, are separately connected the upper end of two column graphite electrodes, and adjustment power supply is
Voltage and repair time are repaired in potentiostatic mode, setting, start soil remediation；
(5), it with the progress of reparation, can be sampled at any time using sampler, measure the content of heavy metal in soil after soil remediation,
Until meeting the standard value in national standard of soil environment quality.
6. the reparation side of a variety of contaminated soil advanced oxidation collaboration electrodynamics in-situ remediation systems according to claim 5
Method, it is characterised in that: the purity of column graphite electrode is 99.9%, and electric conductivity is good, and electrolyte is that the KCl of 0.1mol/L is molten
Liquid.
7. the reparation side of a variety of contaminated soil advanced oxidation collaboration electrodynamics in-situ remediation systems according to claim 5
Method, it is characterised in that: to the advanced oxidation reaction cardinal principle occurred in the soil during soil remediation in step (4) are as follows:
The work of oxygenolysis is played in advanced oxidation agent to the heavy metal ion of the variforms such as organic, exchangeable species in soil
With；
Persulfate produces hydroxyl radical free radical and potentiometric titrations with strong oxidizing property, but mistake under the action of electro-catalysis
Sulfate electro reclamation occur it is thermocatalytic under the influence of will affect the decomposition rate of release of persulfate, and need to adjust electricity
Field intensity and soil pH value are to control the rate of release of hydroxyl radical free radical and potentiometric titrations；
With in various heavy contaminated soil, imposing DC electric field, in electric field there are electromigration, electro-osmosis, electrophoresis work
With electrodynamics is mainly electromigration to the removal of heavy metal ions in soil, if Cd (III) is under the action of electromigration
It being migrated from anode region to cathodic region, heavy metal ion displacement under the action of electromigration is rich in collection or removal a certain, with
Achieve the purpose that remove heavy metal in soil；And the mechanism of action of advanced oxidation agent is the hydroxyl radical free radical generated through catalytic decomposition
It can be, with heavy metal ion existing for organic, exchangeable species variform, to be gone back in oxygenolysis soil with potentiometric titrations
Highly toxic lower valency heavy metal ion can be oxidized to the heavy metal ion of hypotoxicity, or by the heavy metal of low migration rate from
Son is oxidized to the heavy metal ion of high migration rate, equally has the function that remove heavy metal-polluted soil or reduces toxicity；Such as: As
(III) toxicity is 60 times of As (V) toxicity, and hydroxyl radical free radical and potentiometric titrations can aoxidize the As (III) in soil
For As (V), the toxicity in soil is greatly reduced；For another example: the migration rate of Cr (VI) is 60 times of Cr (III) migration rate,
Cr (III) in soil is oxidized to Cr (VI) by hydroxyl radical free radical and potentiometric titrations, considerably increases the migration of Cr (VI)
Rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910294718.9A CN109926447A (en) | 2019-04-12 | 2019-04-12 | A variety of contaminated soil advanced oxidation collaboration electrodynamics in-situ remediation systems and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910294718.9A CN109926447A (en) | 2019-04-12 | 2019-04-12 | A variety of contaminated soil advanced oxidation collaboration electrodynamics in-situ remediation systems and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109926447A true CN109926447A (en) | 2019-06-25 |
Family
ID=66989852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910294718.9A Pending CN109926447A (en) | 2019-04-12 | 2019-04-12 | A variety of contaminated soil advanced oxidation collaboration electrodynamics in-situ remediation systems and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109926447A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479757A (en) * | 2019-09-02 | 2019-11-22 | 河南工程学院 | A kind of the electro reclamation device and restorative procedure of Compound Heavy Metals soil |
| CN111250527A (en) * | 2020-01-15 | 2020-06-09 | 中国科学院南京土壤研究所 | Method for removing persistent organic pollutants in soil through Triton X-100 enhanced advanced oxidation in cooperation with electrokinetic remediation |
| CN112547787A (en) * | 2020-11-25 | 2021-03-26 | 合肥学院 | Portable plasma device and method for repairing polluted soil |
| CN113263048A (en) * | 2021-06-16 | 2021-08-17 | 马智红 | Layered treatment method for heavy metal contaminated soil |
| CN115415304A (en) * | 2022-08-24 | 2022-12-02 | 昆明理工大学 | Method for high-value separation of valuable components in bulk solid waste soil |
| CN115591924A (en) * | 2022-10-08 | 2023-01-13 | 中冶华天工程技术有限公司（Cn） | Electrochemical soil pollution remediation device and method based on PLC control |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513348A (en) * | 2011-12-15 | 2012-06-27 | 中国科学院南京土壤研究所 | Electric complex-strengthening repairing method and device of heavy metal-organic co-contaminated soil |
| KR20150113368A (en) * | 2014-03-28 | 2015-10-08 | 전북대학교산학협력단 | Device for soil remediation contaminated with organic and metals |
| CN108213070A (en) * | 2018-01-10 | 2018-06-29 | 清华大学 | A kind of original position is electronic-device and method of electrochemistry collaboration repairing polluted soil and underground water |
| CN108326036A (en) * | 2018-04-20 | 2018-07-27 | 河南工程学院 | Organic polluted soil electric power couples advanced oxidation in-situ remediation system and method |
| CN108435787A (en) * | 2018-05-23 | 2018-08-24 | 江南大学 | A kind of device and method using electric field and reactive barrier repairing polluted soil |
| CN210010309U (en) * | 2019-04-12 | 2020-02-04 | 河南工程学院 | Advanced oxidation synergistic electrodynamics in-situ remediation system for various contaminated soils |
-
2019
- 2019-04-12 CN CN201910294718.9A patent/CN109926447A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513348A (en) * | 2011-12-15 | 2012-06-27 | 中国科学院南京土壤研究所 | Electric complex-strengthening repairing method and device of heavy metal-organic co-contaminated soil |
| KR20150113368A (en) * | 2014-03-28 | 2015-10-08 | 전북대학교산학협력단 | Device for soil remediation contaminated with organic and metals |
| CN108213070A (en) * | 2018-01-10 | 2018-06-29 | 清华大学 | A kind of original position is electronic-device and method of electrochemistry collaboration repairing polluted soil and underground water |
| CN108326036A (en) * | 2018-04-20 | 2018-07-27 | 河南工程学院 | Organic polluted soil electric power couples advanced oxidation in-situ remediation system and method |
| CN108435787A (en) * | 2018-05-23 | 2018-08-24 | 江南大学 | A kind of device and method using electric field and reactive barrier repairing polluted soil |
| CN210010309U (en) * | 2019-04-12 | 2020-02-04 | 河南工程学院 | Advanced oxidation synergistic electrodynamics in-situ remediation system for various contaminated soils |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479757A (en) * | 2019-09-02 | 2019-11-22 | 河南工程学院 | A kind of the electro reclamation device and restorative procedure of Compound Heavy Metals soil |
| CN110479757B (en) * | 2019-09-02 | 2024-02-09 | 河南工程学院 | Electric restoration device and restoration method for composite heavy metal contaminated soil |
| CN111250527A (en) * | 2020-01-15 | 2020-06-09 | 中国科学院南京土壤研究所 | Method for removing persistent organic pollutants in soil through Triton X-100 enhanced advanced oxidation in cooperation with electrokinetic remediation |
| CN111250527B (en) * | 2020-01-15 | 2021-09-14 | 中国科学院南京土壤研究所 | Method for removing persistent organic pollutants in soil through Triton X-100 enhanced advanced oxidation in cooperation with electrokinetic remediation |
| CN112547787A (en) * | 2020-11-25 | 2021-03-26 | 合肥学院 | Portable plasma device and method for repairing polluted soil |
| CN113263048A (en) * | 2021-06-16 | 2021-08-17 | 马智红 | Layered treatment method for heavy metal contaminated soil |
| CN115415304A (en) * | 2022-08-24 | 2022-12-02 | 昆明理工大学 | Method for high-value separation of valuable components in bulk solid waste soil |
| CN115591924A (en) * | 2022-10-08 | 2023-01-13 | 中冶华天工程技术有限公司（Cn） | Electrochemical soil pollution remediation device and method based on PLC control |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109926447A (en) | A variety of contaminated soil advanced oxidation collaboration electrodynamics in-situ remediation systems and method | |
| CN107116097B (en) | A kind of method for repairing As polluted soil | |
| CN203380185U (en) | Device for restoring polluted soil by using electrodynamic force | |
| CN105057339B (en) | A kind of restorative procedure in situ for removing chromium in chromium slag contaminated soil of site | |
| CN202356398U (en) | Electric repairing device for removing heavy metals and organic pollutants in soil | |
| CN107413837B (en) | Device for repairing petroleum-heavy metal combined contaminated soil by combining electric and microorganism and application | |
| CN102896143B (en) | Electric surfactant combined repair contaminated soil experimental device | |
| CN106111693A (en) | A kind of method of in-situ immobilization arsenic slag contaminated soil of site | |
| CN112872014B (en) | Stackable recyclable microbial electrochemical reactor and degradation method of petroleum hydrocarbon polluted soil | |
| CN103406347A (en) | Method for enriching heavy metals and organic matters in soil | |
| CN207325582U (en) | A kind of electric power soil repair system based on solar energy | |
| CN103896369A (en) | Electrochemical device for treating pollution caused by organic matters and inorganic matters in soil and underground water and application of electrochemical device | |
| CN109731905A (en) | A kind of autonomous controllably soil or the electronic acidification device for dissociation of pollutants in sediments and method | |
| CN109179934A (en) | A kind of method of electrochemical advanced oxidation reaction treatment excess sludge | |
| CN109317506A (en) | The method repaired the electric device of As polluted soil and repair As polluted soil | |
| CN109174951A (en) | A kind of Electroremediation method of hexavalent chromium polluted soil | |
| CN205701842U (en) | A kind of device utilizing Electroremediation contaminated soil | |
| CN108380662A (en) | The soil restoring device and method of organics removal and heavy metal pollution simultaneously | |
| CN202625994U (en) | Electrolytic tank for reducing content of heavy metal in sludge | |
| CN210010309U (en) | Advanced oxidation synergistic electrodynamics in-situ remediation system for various contaminated soils | |
| CN114289488B (en) | Ferrous ion activation method for repairing organic contaminated soil | |
| TWI648227B (en) | Method for converting sewage sludge into soil improvement material | |
| CN105798058A (en) | Method for repairing hexachlorocyclohexane contaminated soil | |
| CN209318419U (en) | A kind of plate shaped graphite electrode electric power contaminated soil remediation device | |
| CN114535282A (en) | Method for degrading organic contaminated soil by combining electric diffusion and persulfate oxidation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190625 |