CN107252815A - The method that active reaction band removes underground water arsenic is constructed in a kind of original position - Google Patents
The method that active reaction band removes underground water arsenic is constructed in a kind of original position Download PDFInfo
- Publication number
- CN107252815A CN107252815A CN201710633548.3A CN201710633548A CN107252815A CN 107252815 A CN107252815 A CN 107252815A CN 201710633548 A CN201710633548 A CN 201710633548A CN 107252815 A CN107252815 A CN 107252815A
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- China
- Prior art keywords
- arsenic
- permanganate
- underground water
- active reaction
- stratum
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The method that active reaction band removes underground water arsenic is constructed the invention discloses a kind of original position, the mixed liquor of permanganate and stabilizer is added in the stratum for needing to repair, permanganate is constructed to form active reaction band in situ with stabilizer reaction under heating condition, arsenic pollution underground water trivalent arsenic during active reaction band is flowed through is oxidized to pentavalent arsenic, and be stably cured in soil, so as to reach the function of underground water removing toxic substances；The inventive method is easy, it is easy to operate, escapable cost.
Description
Technical field
The invention belongs to environmental pollution control technique field, and in particular to a kind of original position constructs active reaction band and removes underground
The method of water outlet arsenic.
Background technology
Arsenic Contamination in Groundwater is a global problem of environmental pollution of current more sternness.According to statistics, current full generation
More than 5,000 ten thousand populations of at least 22 countries and regions in boundary are faced with the drinking water safety caused by Arsenic Contamination in Groundwater
Threaten.The area such as Hetao Plain, Inner Mongolia of China is exactly typical arsenic pollution region, and the compromised population in this area is just up to more than 30
As many as ten thousand people.
Arsenic from underwater mainly exists in the form of trivalent and pentavalent, main with pentavalent arsenic As in the underground water of anoxic
(V) form is present.For human body, trivalent arsenate As (III) toxic action is far longer than pentavalent arsenate As (V).
Arsenic in water is by drinking, skin exposure etc. enters human body and accumulated in human body, and reaching a certain amount of will cause arsenic poisoning.Will
Highly toxic As (III) is converted into the As (V) of hypotoxicity, and form stable and solidification arsenic pollution thing by precipitation, so as to reach
To the arsenic in removal water body rapidly and efficiently to realize pollution amelioration.
In correlation technique, using the arsenic delivered in subsurface formations and underground water in solid adsorption material absorption water or and its
Reaction is so as to remove.But solid material is delivered and is difficult to be evenly distributed into subsurface formations or in underground water, or needs digging to build reaction
Wall fortification, are not easy to large-scale use.
The content of the invention
In view of this, utilize permanganate water solution with stabilizer in soil and ground The embodiment provides one kind
Layer situ reaction, generation oxidation-adsorption active zone removably descends the environment-friendly high-efficiency of water outlet arsenic pollutant, easy to operate method.
In order to solve the above technical problems, the technical scheme that the embodiment of the present invention is used is that active reaction is constructed in a kind of original position
With the method for removing underground water arsenic, comprise the following steps：
(1) the arsenic valence state and concentration distribution on stratum to be repaired are determined, and determines the dilation angle on stratum to be repaired；
(2) lay heated well on the stratum to be repaired and repair the decanting point of liquid, and determine fluid injection parameter and heated well
Heating parameters；
(3) the reparation liquid is injected in the stratum to be repaired by the decanting point；
(4) heated in the heated well, the reparation liquid chemically reacts in a heated condition, described to be repaired
Active reaction band is formed in stratum, oxidation trivalent arsenic is pentavalent arsenic.
Preferably, described to repair the mixed liquor that liquid is permanganate solution and stabilizer, the permanganate is permanganic acid
Potassium or sodium permanganate；The stabilizer is ethylene glycol or polyethylene glycol, and ethylene glycol is in trivalent iron salt or polyethylene glycol and ferric iron
The mixed solution of salt；The trivalent iron salt includes iron chloride or ferric nitrate.
Preferably, the proportioning of the permanganate and stabilizer is with the mole ratio calculation of permanganate and ethylene glycol,
The mole ratio of the permanganate and ethylene glycol is 1：5~30.
Preferably, the heating means in the heated well can be electrical heating method, heat air method, steam injection method, hot water
Injection or electromagnetic energy heating, the heating-up temperature are 90 DEG C~150 DEG C, and the heat time is 0.5~5 hour.
Compared with correlation technique, the beneficial effect that the technical scheme of the embodiment of the present invention is brought is, according to stratum to be repaired
Arsenic valence state and concentration distribution, it is determined that repairing the dilation angle on stratum, decanting point and heated well are laid according to dilation angle, repaired
Liquid is injected by decanting point, after liquid to be repaired spreads uniformly in stratum to be repaired, occurs reparation liquid by heating derrick design
Reaction, generates Mn oxide active reaction band, pentavalent arsenic is oxidized to the trivalent of low toxicity during the reacted band of subsurface flow
Arsenic, further by adsorption precipitation by stable curing and soil；Method is simple, and active reaction band is uniformly distributed, it is to avoid
The phenomenon of uneven arsenic removal occurs, and improves the efficiency and scope of arsenic removal.
Brief description of the drawings
Fig. 1 is the method flow diagram of the embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is further described.、
Embodiment one
Fig. 1 is refer to, the side that active reaction band removes underground water arsenic is constructed The embodiment provides a kind of original position
Method, comprises the following steps：
(1) the arsenic valence state and concentration distribution on stratum to be repaired are determined, and determines the dilation angle on stratum to be repaired；Calculate every
Hole maximum repairs liquid reservoir quantity, fluid injection parameter, the heating radius of heated well；
(2) lay heated well on the stratum to be repaired and repair the decanting point of liquid, and determine fluid injection parameter and heated well
Heating parameters；Refine the district location of heated well and decanting point, according to particular location optimize fluid injection parameter and heated well plus
Thermal parameter；
(3) the reparation liquid is injected in the stratum to be repaired by the decanting point；
Described to repair the mixed liquor that liquid is liquor potassic permanganate and stabilizer, the stabilizer is ethylene glycol or poly- second two
Alcohol, ethylene glycol and trivalent iron salt or the mixed solution of polyethylene glycol and trivalent iron salt；The trivalent iron salt includes iron chloride or nitre
Sour iron；Potassium permanganate is strong oxidizer, and several hundred million are reduced, and its strong oxidizing property can be maintained by being used cooperatively with stabilizer；In stabilizer
Trivalent iron salt also have certain oxidisability, oxidable trivalent arsenic pollutant；
The proportioning of the potassium permanganate and stabilizer is with the mole ratio calculation of potassium permanganate and ethylene glycol, the Gao Meng
The mole ratio of sour potassium and ethylene glycol is 1：5~30；
(4) heated in the heated well, the reparation liquid chemically reacts in a heated condition, described to be repaired
Active reaction band is formed in stratum, oxidation trivalent arsenic is pentavalent arsenic；
Heating means in the heated well can be electrical heating method, heat air method, steam injection method, hot water injection's method or
Electromagnetic energy heating, the heating-up temperature is 90 DEG C~150 DEG C, and the heat time is 0.5~5 hour；Liquid injection is repaired to treat
Repair in stratum, heated after diffusion, potassium permanganate and stabilizer is chemically reacted, potassium permanganate is converted into Mn oxide
(including mangano-manganic oxide, manganese dioxide etc.), forms oxidation and the active reaction of stable underground water outlet arsenic in stratum to be repaired
Band, the arsenic pollution thing of trivalent toxicity is converted to the pentavalent arsenic pollutant of hypotoxicity.
The method flow of the embodiment of the present invention is simple, it is not necessary to adsorbed using solid absorbent, can uniformly effectively
Soil and the big trivalent arsenic pollutant of water intoxication are removed, and can be removed steadily in the long term.
Embodiment two
According to the reparation in the method for embodiment one simulation arsenic pollution underground water region in sealed small-sized earth pillar reactor,
Liquid potassium permanganate and ethylene glycol mixture are repaired in soil layer injection in the middle of to earth pillar, while making potassium permanganate and second by steam heating
Glycol fully reacts the Mn oxide for being converted into solid-state, forms active reaction band.
Wherein, the reparation liquid is 30mL, and the mole ratio of the potassium permanganate and ethylene glycol is 1:18；Wherein, institute
The addition for stating potassium permanganate is 2mmol, and the addition of ethylene glycol is 36mmol；The steam heat time is 1h, and temperature is 120
℃。
Saturation is filled into earth pillar, and the trivalent arsenic being passed through in the anaerobic environment of nitrogen simulated groundwater, underground water contains
Measure as 500 μ g/L, and discharged the air in earth pillar by conduit, the water in earth pillar is extracted out after air discharge, current are controlled
Speed is 0.1mL/min, earth pillar is formed stable groundwater simulation flow field.
The concentration of trivalent arsenic is detected to water repaired in the earth pillar of extraction, is below 30 μ g/L, to show implementation of the present invention
The method of example can effectively remove trivalent arsenic in underground water.
Embodiment three
According to the reparation in the method for embodiment one simulation arsenic pollution underground water region in sealing earth pillar reactor, to earth pillar
Liquid potassium permanganate and ethylene glycol mixture are repaired in middle soil layer injection, while making potassium permanganate be filled with ethylene glycol by steam heating
Divide reaction to be converted into the Mn oxide of solid-state, form active reaction band.
Wherein, the reparation liquid is 50mL, and the mole ratio of the potassium permanganate and ethylene glycol is 1:18；The Gao Meng
The addition of sour potassium is 2mmol, and the addition of ethylene glycol is 36mmol；The dosage of iron chloride is 2mmol.Remaining be the same as Example
Two.
Herein, the involved noun of locality such as forward and backward, upper and lower is to be located at parts in accompanying drawing in figure and zero
The position of part each other is intended merely to the clear of expression technology scheme and conveniently come what is defined.It should be appreciated that the noun of locality
Use should not limit the claimed scope of the application.
In the case where not conflicting, the feature in embodiment and embodiment herein-above set forth can be combined with each other.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (4)
1. the method that active reaction band removes underground water arsenic is constructed in a kind of original position, it is characterized in that：Comprise the following steps：
(1) the arsenic valence state and concentration distribution on stratum to be repaired are determined, and determines the dilation angle on stratum to be repaired；
(2) lay heated well on the stratum to be repaired and repair the decanting point of liquid, and determine fluid injection parameter and heated well plus
Thermal parameter；
(3) the reparation liquid is injected in the stratum to be repaired by the decanting point；
(4) heated in the heated well, the reparation liquid chemically reacts in a heated condition, on the stratum to be repaired
Middle formation active reaction band, oxidation trivalent arsenic is pentavalent arsenic.
2. the method that active reaction band removes underground water arsenic is constructed in a kind of original position according to claim 1, it is characterized in that：Institute
The mixed liquor for repairing that liquid is permanganate solution and stabilizer is stated, the permanganate is potassium permanganate or sodium permanganate；It is described
Stabilizer is ethylene glycol or polyethylene glycol, and ethylene glycol is in trivalent iron salt or the mixed solution of polyethylene glycol and trivalent iron salt；It is described
Trivalent iron salt includes iron chloride or ferric nitrate.
3. the method that active reaction band removes underground water arsenic is constructed in a kind of original position according to claim 2, it is characterized in that：Institute
The proportioning of permanganate and stabilizer is stated with the mole ratio calculation of permanganate and ethylene glycol, the permanganate and second two
The mole ratio of alcohol is 1：5~30.
4. the method that active reaction band removes underground water arsenic is constructed in a kind of original position according to claim 1, it is characterized in that：Institute
It can be electrical heating method, heat air method, steam injection method, hot water injection's method or electromagnetic energy heating to state the heating means in heated well
Method, the heating-up temperature is 90 DEG C~150 DEG C, and the heat time is 0.5~5 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710633548.3A CN107252815A (en) | 2017-07-28 | 2017-07-28 | The method that active reaction band removes underground water arsenic is constructed in a kind of original position |
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| CN201710633548.3A CN107252815A (en) | 2017-07-28 | 2017-07-28 | The method that active reaction band removes underground water arsenic is constructed in a kind of original position |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107962066A (en) * | 2017-11-29 | 2018-04-27 | 宁波江北清纬环保科技有限公司 | Soil treatment environmental protecting device |
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| CN101830551A (en) * | 2010-03-23 | 2010-09-15 | 中国地质大学（武汉） | In-situ arsenic removing method of underground water |
| CN103920704A (en) * | 2014-04-24 | 2014-07-16 | 杭州大地环保工程有限公司 | Arsenic-polluted soil remediation method |
| CN104211123A (en) * | 2014-09-16 | 2014-12-17 | 吉林大学 | Preparation method for manganese oxide nano rods |
| CN105062492A (en) * | 2015-08-19 | 2015-11-18 | 河南省地质环境规划设计院有限公司 | Chemical stabilizer suitable for soil remediation of arsenic polluted site and use method of chemical stabilizer |
| CN106966481A (en) * | 2017-05-17 | 2017-07-21 | 吉林大学 | The method that in-situ reducing repairs Polluted Groundwater |
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2017
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| CN103920704A (en) * | 2014-04-24 | 2014-07-16 | 杭州大地环保工程有限公司 | Arsenic-polluted soil remediation method |
| CN104211123A (en) * | 2014-09-16 | 2014-12-17 | 吉林大学 | Preparation method for manganese oxide nano rods |
| CN105062492A (en) * | 2015-08-19 | 2015-11-18 | 河南省地质环境规划设计院有限公司 | Chemical stabilizer suitable for soil remediation of arsenic polluted site and use method of chemical stabilizer |
| CN106966481A (en) * | 2017-05-17 | 2017-07-21 | 吉林大学 | The method that in-situ reducing repairs Polluted Groundwater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107962066A (en) * | 2017-11-29 | 2018-04-27 | 宁波江北清纬环保科技有限公司 | Soil treatment environmental protecting device |
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Application publication date: 20171017 |
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