CN104291488A - Device for restoring heavy metal arsenic in underground water - Google Patents
Device for restoring heavy metal arsenic in underground water Download PDFInfo
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- CN104291488A CN104291488A CN201410529859.1A CN201410529859A CN104291488A CN 104291488 A CN104291488 A CN 104291488A CN 201410529859 A CN201410529859 A CN 201410529859A CN 104291488 A CN104291488 A CN 104291488A
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Abstract
The invention relates to a device for restoring heavy metal arsenic in underground water. The device for restoring the heavy metal arsenic in the underground water comprises a water inlet (1), a stirrer (2), a sedimentation region (3), a filtering region (4), a water channel I (5), a backwashing device (6), a water channel II (7), alkaline anion exchange resin (8), an ion exchange region (9), a water outlet (10) and an expanded polytetrafluoroethylene film (11). Underground water pumped by a water pump enters the sedimentation region (3) from the water inlet (1), a flocculating agent is added, stirring is carried out by virtue of the stirrer (2), arsenic in the underground water is separated and sedimented, the underground water is filtered by virtue of the expanded polytetrafluoroethylene film (11), the arsenic is filtered out from the underground water again under the backwashing action of the backwashing device, finally the underground water enters the ionic exchange region (9), and ionic exchange reaction is carried out on the underground water and the anion exchange resin (8). Concentration of the arsenic in the underground water is detected to be 0.0106-0.0108mg/L, the concentration of the arsenic in the underground water treated by the device provided by the invention is detected to be 0.00105-0.00107mg/L, and removal rate of the arsenic in the underground water reaches up to more than 92% after treatment by the device.
Description
Technical field
The present invention relates to a kind of method of repairing heavy metal arsenic in underground water, belong to water treatment field.
Background technology
Underground water is the important component part of nature water cycle, with mankind's activity and survive closely bound up.Along with the development of producing, the problem of underground water heavy metal contamination is day by day serious, has become one of the most urgent problem of environmental pollution that current mankind faces.From the viewpoint of toxicity and the harm to organism, heavy metal arsenic has following features: as long as there is micro-concentrations to produce toxic effect in natural water body.Microorganism generally can not degrade them, and therefore its impact is difficult to eliminate at short notice.Under normal circumstances, give suddenly once be polluted by it, As time goes on, heavy metal arsenic can be transferred in underground water gradually, along with the flowing of underground water is spread gradually, thus causes underground water severe contamination.
The dosage of human body arseniasis is 10-50mg, and lethal dose is 100-300mg.Arsenic is mainly through respiratory tract, and esophagus, mucocutaneously enters human body.Arseniasis is a systemic disease based on skin lesion, and it can the skin of harmful to human, breathing, digestion, uropoiesis, cardiovascular, neural, hemopoietic system etc., can be divided into acute and chronic poisoning by its pathogenic process.In addition, arsenic also has three-induced effect, i.e. carcinogenic, teratogenesis and mutagenesis.The toxicity of arsenic mainly affects the effect of the enzyme relevant with sulfhedryl (SH), hinders cellular respiration.Because the physics chemical action process of underground water and its heavy metal pollutants is very complicated, it is often very hidden and slow that it pollutes process, both be not easy to find early, be difficult to again administer within a short period of time and prove effective, therefore the Pollution abatement of underground environment is more more complicated and difficult than ground surface environment, thus also requires higher to recovery technique.Process arsenic-containing waste water, mainly contains moderate water-cut stage, flocculent precipitation, ferrite process, sulphide precipitation etc. both at home and abroad at present, is applicable to high-concentration arsenic-containing wastewater, but the mud generated easily causes secondary pollution.
Summary of the invention
The present invention is directed to that traditional restorative procedure cycle is long, remediation efficiency is low, and be easy to cause secondary pollution problems to provide a kind of repairing efficiency be short, repair rate is high, the method for heavy metal arsenic in the reparation underground water of environment protection clean.
Repair a device for heavy metal arsenic in underground water, comprise water-in (1), agitator (2), settling region (3), filtrating area (4), cross aquaporin (5), back-purge system (6), cross aquaporin (8), basic anion exchange resin (9), ion-exchange area (10), expanded polyvinyl fluoride thin film (11), described underground water enters into settling region (3) through water pump extracting by water-in (1), add flocculation agent simultaneously and stir precipitation, the back flushing effect of the water after precipitation expanded polyvinyl fluoride thin film (11) filtration and back-purge system (6) in filtrating area (4), arsenic from underwater is purified further and filters, water after filtration passes into ion-exchange area (9) subsequently and carries out ion-exchange, arsenic from underwater is after the ion exchange reaction of basic anion exchange resin (8), removed, underground water after treatment recharges through water outlet (10) subsequently.
In described settling region, (3) are provided with agitator (2), after adding flocculation agent, then stir in underground water, and by arsenic precipitation in water, described flocculation agent is iron trichloride.
Be provided with back-purge system (6) and expanded polyvinyl fluoride thin film (11) in described filtrating area (4), underground water after filtration and back flushing, make arsenic from underwater first with underground moisture under filtering.
Described ion-exchange area (9) is filled with basic anion exchange resin (11), and described anionite-exchange resin is styrene series anion exchange resin.
Principle of work of the present invention: the water taken out on water pump enters into device settling region (3), first stirs redeposition, by adding Fe
2+, Fe
3+, Al
3+, Mg
2+, Mn
2+plasma, and be transferred to suitable pH with calcium hydroxide.It is made to be hydrolyzed formation hydroxide colloid, these hydroxide colloids can be adsorbed on surface arsenic from underwater, in water under electrolytical effect, hydroxide colloid collides cohesion mutually, and its surface adsorption thing (arsenide) is wrapped in aggregate, form velvet-like gel, reach the object of water quality arsenic removal.After agitator (2) stirs, arsenic removal is more quick.Water is passed into filtrating area (4) subsequently, use expanded polyvinyl fluoride thin film (11) filtering technique, first filter, then use back-purge system (6) back flushing, water conditioning is cleaner.Finally water being passed into ion-exchange area (9) uses deacidite (8) to carry out ion-exchange.Thus reach the object of arsenic removal.
Application method of the present invention: underground water, through water pump extracting, enters settling region (3) by water inlet (1), mixes with coagulating agent, after agitator (2) stirs, precipitation; Underground water passes into filtrating area (4) more subsequently, and in district, expanded polyvinyl fluoride thin film (11) filters after filtration, then carries out back flushing; Finally, underground water enters ion-exchange area (9), with basic anion exchange resin (8), ion exchange reaction occurs, with after recharge other source of clean water through water outlet (10).
The significant advantage that the present invention has is: (1), first precipitate, and uses flocculation adsorption, and stirs, and makes arsenic condense evenly, precipitation; (2), expanded polytetrafluoroethylsealing film is filtrate, the molecule in liquid all can be trapped in the surface of film, carry out back flushing simultaneously to film surface, filter cake by clean from film removing surface up hill and dale, high void ratio of film; Energy high efficiency filter arsenic from underwater; (3), again carry out ion-exchange with deacidite, make water quality reach drinkable standard.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is structural representation of the present invention.
Wherein: (1) water inlet; (2) agitator; (3) settling region; (4) filtrating area; (5) aquaporin is crossed 1.; (6) back-purge system; (7) aquaporin is crossed 2.; (8) basic anion exchange resin; (9) ion-exchange area; (10) water outlet; (11) expanded polytetrafluoroethylsealing film.
Specific embodiments
Repair a method for heavy metal arsenic in underground water, method is:
(1) first to the geological prospecting of underground water, polluted underground water source integrated distribution situation is determined;
(2) again to underground water water quality detection, heavy metal arsenic point-source distribution in Groundwater is determined;
(3) contrast heavy metal arsenic point-source distribution in Groundwater, find heavily contaminated region, and connect lift pump in underground water source concentrated area;
(4) from water source centrostigma, underground water is pumped to heavy metal arsenic prosthetic device with water pump;
(5) first underground water is passed into settling region, arsenic from underwater is precipitated, then passes into filtrating area, filter through expanded fluorinated ethylene propylene, and back flushing is carried out to underground water;
(6) again underground water is passed into ion-exchange area, react with hydrogen type cation exchange resin;
(7) after prosthetic device process, the underground water after process is directly passed into river, then Water Spreading is entered underground water source.
Example 1
Extracting is carried out to middle and lower reach of Yangtze River local ground watering, underground water is first passed into settling region, agitator speed is 60r/min, flocculation dosage is 20mg/L, after precipitation, then, again underground water is passed into filtrating area, polyvinyl fluoride thin film concentration is 10%, and finally the underground water after filtration is passed into ion-exchange area, basic anion exchange resin loading level is 20g/L.The groundwater treatment cycle completes, and before recording groundwater treatment, arsenic concentration content is 0.0106mg/L, and after process, arsenic concentration is 0.00105mg/L, and recording arsenic removal rate through water outlet discharge is 90%.
Example 2
Extracting is carried out to middle and lower reach of Yangtze River local ground watering, underground water is first passed into settling region, agitator speed is 120r/min, flocculation dosage 20mg/L, after precipitation, then, again underground water is passed into filtrating area, polyvinyl fluoride thin film concentration is 10%, and finally the underground water after filtration is passed into ion-exchange area, basic anion exchange resin loading level is 25g/L.Groundwater treatment completes, and before recording groundwater treatment, arsenic concentration content is 0.0107mg/L, and after process, arsenic concentration is 0.00106mg/L, and recording arsenic removal rate through water outlet discharge is 91%.
Example 3
Extracting is carried out to middle and lower reach of Yangtze River local ground watering, underground water is first passed into settling region, agitator speed is 180/min, flocculation dosage is 20mg/L, after precipitation, then, again underground water is passed into filtrating area, polyvinyl fluoride thin film concentration is 10%, and finally the underground water after filtration is passed into ion-exchange area, basic anion exchange resin loading level is 30g/L.Groundwater treatment completes, and before recording groundwater treatment, arsenic concentration content is 0.0108mg/L, and after process, arsenic concentration is 0.00105mg/L, and water outlet is discharged and recorded arsenic removal rate is 92%.
Claims (4)
1. repair a device for heavy metal arsenic in underground water, it is characterized in that: comprise water-in (1), agitator (2), settling region (3), filtrating area (4), cross aquaporin (5), back-purge system (6), cross aquaporin (8), basic anion exchange resin (9), ion-exchange area (10), expanded polyvinyl fluoride thin film (11), described underground water enters into settling region (3) through water pump extracting by water-in (1), add flocculation agent simultaneously and stir precipitation, the back flushing effect of the water after precipitation expanded polyvinyl fluoride thin film (11) filtration and back-purge system (6) in filtrating area (4), arsenic from underwater is purified further and filters, water after filtration passes into ion-exchange area (9) subsequently and carries out ion-exchange, arsenic from underwater is after the ion exchange reaction of basic anion exchange resin (8), removed, underground water after treatment recharges through water outlet (10) subsequently.
2. a kind of device repairing heavy metal arsenic in underground water according to claim 1, it is characterized in that: in described settling region, (3) are provided with agitator (2), after adding flocculation agent, then stir in underground water, by arsenic precipitation in water, described flocculation agent is iron trichloride.
3. a kind of device repairing heavy metal arsenic in underground water according to claim 1, it is characterized in that: in described filtrating area (4), be provided with back-purge system (6) and expanded polyvinyl fluoride thin film (11), underground water after filtration and back flushing, make arsenic from underwater first with underground moisture under filtering.
4. a kind of device repairing heavy metal arsenic in underground water according to claim 1, it is characterized in that: described ion-exchange area (9) are filled with basic anion exchange resin (11), and described anionite-exchange resin is styrene series anion exchange resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410529859.1A CN104291488A (en) | 2014-10-09 | 2014-10-09 | Device for restoring heavy metal arsenic in underground water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410529859.1A CN104291488A (en) | 2014-10-09 | 2014-10-09 | Device for restoring heavy metal arsenic in underground water |
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| CN104291488A true CN104291488A (en) | 2015-01-21 |
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| CN201410529859.1A Pending CN104291488A (en) | 2014-10-09 | 2014-10-09 | Device for restoring heavy metal arsenic in underground water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106517577A (en) * | 2016-11-21 | 2017-03-22 | 广东先导稀材股份有限公司 | Process for processing acidic arsenic-containing waste water |
| CN110550772A (en) * | 2019-08-06 | 2019-12-10 | 北京师范大学 | Ion exchange pretreatment-membrane filtration combined process for removing arsenic |
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| CN102826684A (en) * | 2012-09-14 | 2012-12-19 | 上海问鼎水处理工程有限公司 | Method for removing lead ions in sewage |
| CN103058421A (en) * | 2013-01-25 | 2013-04-24 | 河北省电力建设调整试验所 | Treatment method for recycling circulating sewage in power plant |
| WO2014094003A2 (en) * | 2013-03-13 | 2014-06-19 | Kadant Inc. | Whitewater recovery process |
| CN104005050A (en) * | 2014-06-06 | 2014-08-27 | 四川恒达环境技术有限公司 | Method for treating and recycling divalent manganese in electrolytic manganese wastewater |
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2014
- 2014-10-09 CN CN201410529859.1A patent/CN104291488A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826684A (en) * | 2012-09-14 | 2012-12-19 | 上海问鼎水处理工程有限公司 | Method for removing lead ions in sewage |
| CN103058421A (en) * | 2013-01-25 | 2013-04-24 | 河北省电力建设调整试验所 | Treatment method for recycling circulating sewage in power plant |
| WO2014094003A2 (en) * | 2013-03-13 | 2014-06-19 | Kadant Inc. | Whitewater recovery process |
| WO2014094003A3 (en) * | 2013-03-13 | 2014-12-31 | Kadant Inc. | Whitewater recovery process |
| CN104005050A (en) * | 2014-06-06 | 2014-08-27 | 四川恒达环境技术有限公司 | Method for treating and recycling divalent manganese in electrolytic manganese wastewater |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106517577A (en) * | 2016-11-21 | 2017-03-22 | 广东先导稀材股份有限公司 | Process for processing acidic arsenic-containing waste water |
| CN106517577B (en) * | 2016-11-21 | 2019-09-03 | 广东先导稀材股份有限公司 | The treatment process of acidic arsenic-containing waste water |
| CN110550772A (en) * | 2019-08-06 | 2019-12-10 | 北京师范大学 | Ion exchange pretreatment-membrane filtration combined process for removing arsenic |
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Application publication date: 20150121 |