CN105127192B - The method that chemical solvent reduction soil permeability is added by electrochemical means - Google Patents
The method that chemical solvent reduction soil permeability is added by electrochemical means Download PDFInfo
- Publication number
- CN105127192B CN105127192B CN201510576844.5A CN201510576844A CN105127192B CN 105127192 B CN105127192 B CN 105127192B CN 201510576844 A CN201510576844 A CN 201510576844A CN 105127192 B CN105127192 B CN 105127192B
- Authority
- CN
- China
- Prior art keywords
- soil
- added
- chemical solvent
- permeability
- soil permeability
- 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.)
- Expired - Fee Related
Links
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to environmental protection technical field, specially a kind of method that chemical solvent reduction soil permeability is added by electrochemical means.The present invention should be less than 30 40% soil as object with gravel concentration, calcium chloride solution is added in anode, in the cathode add equivalent containing carbonate, phosphate radical, silicate electrolyte hydroxy, it is electrode that graphite cake and stainless steel plate is respectively adopted, apply DC voltage, voltage gradient is 2 ± 1 V/cm, is powered up to current reduction to steady state value.Soil permeability highest can reduce by 91.67%, and soil permeability is minimum to be down to 7.23 × 10‑7M/s, soil pH is near neutral after electricity reparation.
Description
Technical field
The invention belongs to environmental technology field, and in particular to one kind reduces soil permeability, the method for lifting resistance of soil.
Background technology
When sudden environment event occurs, pollutant is leaked in soil, with rainfall and diffuses into water table
In.Emergency disposal is generally divided into three steps：Pollution source apportionment, diffusion process control and Disposal of Contaminants and collection.At present
Conventional several emergency methods have artificial improvement method, that is, cut dirty water conservancy diversion and dilute contaminated underground water；Active carbon adsorption, uses
Pollutant in charcoal absorption underground water；Method for dosing medicine, chemical agent is added in contaminated body of groundwater, anti-using neutralizing
The effect removal pollutant such as degraded should be precipitated；Heating, by heating the methods such as steam, is easily removed pollutant；Original position punching
Wash method；Stabilization-curing in situ；Plant treatment method；The methods such as air injection recovery technique.But these emergency processings are done
Method is carried out under conditions of underground water has polluted, and can not be prevented effectively from underground water pollution.
Therefore consolidated soil reduction soil permeability, can cause that the time of contaminant infiltration to water table is elongated, it is people
Work clears up pollutant, and the organic pollution that microbial degradation has been penetrated into soil tries to gain time precious to one.
The mode of current consolidated soil has many kinds, and flyash is such as added in soil；Plus Tannin adhesive is added in soil；Plus
Enter iron ion, ferric hydroxide colloid closure soil is generated in soil aperture；Urea and calcium chloride are added, and is given birth to bacteria-induction
Into precipitation of calcium carbonate.Also the most method studied of most common of which is that calcium chloride and urea are poured into soil, and is poured into
Bacterial suspension, the inductive formation calcium carbonate in the hole of soil reduces the permeability of soil.But these methods exist a lot
Problem, such as can only dystopy treatment；Grouting way is complicated；The calcium carbonate skewness of generation, upper soll layer is easily cementing, influence
Solution is further poured into；Reaction speed is slow；Microorganism is high to soil environment requirement, and too high urea suppresses the life of microorganism
It is long；In the case of soil aperture is less, microorganism suspension is difficult in the soil of infiltration deeper.
Due to the presence of these problems, the present invention is proposed and a kind of is added chemical solvent to lift soil by way of electrochemistry
The method of earth property.The method has can be polluted soil of advantage with in-situ treatment, and suitable for the soil of various properties,
Reaction speed is fast, can within a very short time reduce the permeability of soil.And calcium carbonate is precipitated as due to what is generated in soil,
The material that the soil such as calcium silicates contain originally, will not produce secondary pollution.
The content of the invention
It is an object of the invention to provide it is a kind of can quickly, the reduction soil permeability of in situ and non-secondary pollution
Method.
The method of the reduction soil permeability that the present invention is provided, is that chemical solvent to soil is added by way of electrochemistry
In, soil property is lifted, comprise the following steps that：
（1）First, pending soil is loaded in device, is added water, make soil moisture content be 30-40%；
（2）Then, chemical solvent is separately added into anode and cathode slot electrode, it is 1 ± 0.2 mol/L that anode adds concentration
Calcium chloride solution, it is 1 ± 0.2 mol/L containing silicate, carbonate, phosphate radical, chemistry hydroxy that negative electrode adds concentration
Solution；
（3）Finally, with graphite or stainless steel as electrode, applying direct current electric field, voltage gradient is 2 ± 1 V/cm, works as electric current
Stop reaction by when being decreased to steady state value.
In the present invention, the selection of soil is：Gravel concentration in soil more than 2mm is less than 30%, it is ensured that soil possesses saturation
Moisture content（Between 30-40%）.
The inventive method can it is quick, in situ, the permeability of soil is greatly lowered cleanly, it is intended to prevent soil table
Layer suddenly accident when migration from pollutant to underground water, it is to avoid polluted underground water.
Brief description of the drawings
Fig. 1 is the electrochemical appliance schematic diagram for reducing soil permeability.
Specific embodiment
Gravel concentration of the soil more than 2mm should be less than 30% in the present invention.Below by specific embodiment, further describe
The present invention.
Embodiment 1：
The topsoil of experiment Department of Soil's Shanghai collection used, the organic matter and pH of soil are respectively 5.15% and 8.11, soil
Earth composition includes 14.54% clay, 39.11% flour sand, 46.35% sand.
As shown in figure 1, electrochemical appliance is made up of lucite, size is electrochemical appliance used in an experiment
16cm × 5 cm × 7 cm (length × width × height).Device is broadly divided into three parts：Anode chamber, cathode chamber and comprising soil
Middle pole room.Dry soil is added in dynode room, and ultra-pure water is added in anode chamber and cathode chamber, until both sides
The water level of pole room is no longer reduced, and unnecessary ultra-pure water is extracted out with syringe.It is 1 ± 0.2 to add 100mL concentration in the anode compartment
The calcium chloride solution of mol/L, it is sodium carbonate, potassium dihydrogen phosphate, the silicic acid of 1 ± 0.2 mol/L that 100mL concentration is added in cathode chamber
Potassium and sodium hydroxide solution.In the vicinity of cathode chamber, a consequent pole room separated with cationic membrane is separately set, and in the pole room
Add 100 mL ultra-pure waters.After being put into stainless steel electrode plate in consequent pole room and anode chamber respectively, apply DC electric field, its voltage
Gradient is 2 ± 1V/cm.Until electric current stops this reaction when being decreased to constant.Result shows, after 6h, negative electrode is also sodium carbonate, phosphorus
The experimental group of acid dihydride potassium, potassium silicate and NaOH, its soil permeability is reduced respectively compared to initial soil permeability
91.7%th, 50.2%, 85.7% and 61.3%, and maintain stabilization.After measured, now soil permeability as little as 7.23 × 10-7 m/s、
4.34×10-6 m/s、5.58×10-7M/s and 8.72 × 10-6 m/s.Meanwhile, reaction after terminating average pH be 7.20,
6.03rd, 7.06 and 8.52.
Embodiment 2：
The topsoil of experiment Department of Soil's Shanghai collection used, the content of organic matter and pH of soil are respectively 5.15% He
8.11, soil constituent includes 14.54% clay, 39.11% flour sand, 46.35% sand.
As shown in figure 1, electrochemical appliance is made up of lucite, size is electrochemical appliance used in an experiment
16cm × 5 cm × 7 cm (length × width × height).Device is broadly divided into three parts：Anode chamber, cathode chamber and containing soil
Middle pole room.By dry soil add in the middle of in pole room, and ultra-pure water is added in anode chamber, cathode chamber, until both sides pole
The water level of room is no longer reduced, and unnecessary ultra-pure water is extracted out with syringe.It is 1 ± 0.2 to add 100 mL concentration in the anode compartment
The calcium chloride solution of mol/L, it is sodium carbonate, potassium dihydrogen phosphate, the silicic acid of 1 ± 0.2 mol/L that 100mL concentration is added in cathode chamber
Potassium and sodium hydroxide solution.In the vicinity of cathode chamber, there is a consequent pole room separated with cationic membrane, added in the pole room
100mL ultra-pure waters.After being put into graphite electrode plate in consequent pole room and anode chamber respectively, apply DC electric field, voltage gradient be 2 ±
1V/cm.Stop reaction when electric current is decreased to constant.Result shows, after 6h, soil permeability drops compared to initial soil permeability
It is low by 81.2%, 46.5%, 78.3% and 51.4%, and maintain stabilization.After measured, now soil permeability as little as 7.07 × 10-7
m/s、4.05×10-6 m/s、5.45×10-7M/s and 8.71 × 10-6 m/s.Meanwhile, reaction terminates the average pH of rear soil
It is 7.13,6.22,7.01 and 8.31.
Claims (2)
1. it is a kind of by electrochemical means add chemical solvent reduction soil permeability method, it is characterised in that specific steps are such as
Under：
（1）First, pending soil is loaded in device, is added water, make soil moisture content be 30-40%；
（2）Then, chemical solvent is separately added into anode and cathode slot electrode, it is the chlorine of 1 ± 0.2 mol/L that anode adds concentration
Change calcium solution, negative electrode add equivalent containing silicate, carbonate, phosphate radical and chemical solution hydroxy；
（3）Finally, with graphite or stainless steel as electrode, applying direct current electric field, voltage gradient is 2 ± 1 V/cm, when electric current reduces
During to steady state value, stop reaction.
2. method according to claim 1, it is characterised in that the selection of soil：Gravel concentration in soil more than 2mm
Less than 30%, to ensure the saturated aqueous rate of soil between 30-40%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510576844.5A CN105127192B (en) | 2015-09-12 | 2015-09-12 | The method that chemical solvent reduction soil permeability is added by electrochemical means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510576844.5A CN105127192B (en) | 2015-09-12 | 2015-09-12 | The method that chemical solvent reduction soil permeability is added by electrochemical means |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105127192A CN105127192A (en) | 2015-12-09 |
| CN105127192B true CN105127192B (en) | 2017-07-07 |
Family
ID=54712952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510576844.5A Expired - Fee Related CN105127192B (en) | 2015-09-12 | 2015-09-12 | The method that chemical solvent reduction soil permeability is added by electrochemical means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105127192B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106424117B (en) * | 2016-10-15 | 2019-05-03 | 太原理工大学 | Mantoquita strengthens cathode electro reclamation heavy-metal contaminated soil device |
| CN106929026A (en) * | 2017-01-19 | 2017-07-07 | 化工部长沙设计研究院 | A kind of permeability-reducing admixture and its construction method for carbonate containing soil |
| CN106872524B (en) * | 2017-04-07 | 2023-11-21 | 大连理工大学 | Multifunctional electroosmosis reinforcing soft clay equipment and testing method |
| CN107724379B (en) * | 2017-09-21 | 2019-06-21 | 河海大学 | A kind of method of electrochemistry-vacuum prepressing reinforcement soft base |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5476992A (en) * | 1993-07-02 | 1995-12-19 | Monsanto Company | In-situ remediation of contaminated heterogeneous soils |
| GB9908632D0 (en) * | 1999-04-15 | 1999-06-09 | Upperforce Limited | Treatment of polluted or contaminated substrates |
| CN1827248A (en) * | 2006-04-12 | 2006-09-06 | 华中科技大学 | Process for repairing organic material contaminated soil |
| CN102357522B (en) * | 2011-07-21 | 2013-04-17 | 辽宁科技大学 | Method for electrokinetic restoration of chromium-contaminated soil by using bipolar electrode |
| CN103286119B (en) * | 2013-06-07 | 2014-10-15 | 华北电力大学 | Device and method for restoring chlorobenzene-type organism polluted soil and underground water |
| CN103896369B (en) * | 2014-04-11 | 2015-10-21 | 金松 | A kind of electrochemical appliance and application thereof of administering soil and groundwater organism and inorganic pollution |
| CN104001715B (en) * | 2014-06-03 | 2016-09-28 | 复旦大学 | A kind of method of in-situ solidifying-remove heavy metal-polluted soil |
| CN104492796A (en) * | 2014-12-09 | 2015-04-08 | 江苏盖亚环境工程有限公司 | Electrokinetic remediation method of heavy metal contaminated soil |
-
2015
- 2015-09-12 CN CN201510576844.5A patent/CN105127192B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN105127192A (en) | 2015-12-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105127192B (en) | The method that chemical solvent reduction soil permeability is added by electrochemical means | |
| CN103318992B (en) | Double-anode electric flocculation arsenic removing method | |
| CN102976472B (en) | Groundwater remediation method by Electro-Fenton reaction using iron cathode | |
| Li et al. | Microbial fuel cells using natural pyrrhotite as the cathodic heterogeneous Fenton catalyst towards the degradation of biorefractory organics in landfill leachate | |
| CN102910709B (en) | In-situ remediation method for organic contaminated underground water | |
| CN103316908B (en) | Device and method for restoring soil polluted by polychlorinated biphenyl | |
| KR101276660B1 (en) | Method for removal of heavy metals or recovery of precious metals using a microbial fuel cell | |
| CN103922446B (en) | Electrochemical oxidation method for trivalent arsenic in underground water | |
| CN203370805U (en) | Improved in-situ repairing device for polluted soil | |
| US20210198122A1 (en) | Device for decomplexation and enhanced removal of copper based on self-induced fenton-like reaction constructed by electrochemistry coupled with membrane separation, and use thereof | |
| CN107030101A (en) | A kind of method of utilization microbial association EK PRB restoration of soil polluted by heavy metal | |
| CN203304273U (en) | Engineering implementation structure for in-situ electrically treating heavy metal contaminated soil | |
| CN107032537A (en) | A kind of processing method of refuse leachate nanofiltration concentrated water | |
| CN104909526B (en) | Device for removing heavy metals in sludge by using electro-dynamic method and synchronously and deeply dehydrating sludge | |
| CN107724379B (en) | A kind of method of electrochemistry-vacuum prepressing reinforcement soft base | |
| CN106311738B (en) | A kind of in-situ oxidation reduction repair system | |
| CN101781001A (en) | Method for processing effluent by two-stage electrolysis and device thereof | |
| CN109719122A (en) | The processing method and processing device of heavy metal ion in a kind of removal soil (water body) with adsorbent | |
| CN105293771A (en) | Rubbish penetrating fluid treatment method | |
| CN207391073U (en) | A kind of three-dimensional electrolysis device of synchronous removal beneficiation wastewater COD and heavy metal | |
| CN106424117A (en) | Device for electro-kinetic remediation of heavy metal contaminated soil by utilizing copper salt reinforced cathode | |
| CN111889502A (en) | Method for removing petroleum hydrocarbon in soil through persulfate synergistic electrokinetic remediation | |
| CN205653218U (en) | Multidimension electrolysis sewage treatment device | |
| CN205042873U (en) | Heavy metal contaminated soil processing system | |
| CN102091710B (en) | Method and device for removing heavy metal pollutants in fly ash |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170707 Termination date: 20200912 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |