CN107555679A - The apparatus and method of arsenic pollution in a kind of reparation underground water - Google Patents
The apparatus and method of arsenic pollution in a kind of reparation underground water Download PDFInfo
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- CN107555679A CN107555679A CN201711045330.2A CN201711045330A CN107555679A CN 107555679 A CN107555679 A CN 107555679A CN 201711045330 A CN201711045330 A CN 201711045330A CN 107555679 A CN107555679 A CN 107555679A
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Abstract
The device of arsenic pollution in a kind of reparation underground water, including pumping system, processing system and the processing system between pumping system and recharge system；Wherein：Pumping system：Placement suction pump, suction pump are connected to the pretreating zone of processing system by drinking-water pipe in pumped well, and suction pump is connected with flow controller；Processing system includes pretreating zone and treatment region, and wherein pretreating zone is the packed layer of activated carbon and fine sand, and the water inlet of pretreating zone connects suction pump by drinking-water pipe；The upper end for the treatment of region is provided with Zero-valent Iron supply device, and treatment region lower end is provided with nanometer aeration device, and one end for the treatment of region is provided with permeable membrane, and the delivery port for the treatment of region is connected to the inverted well of recharge system；Recharge filler is filled with the inverted well of recharge system.The invention also discloses the method that Arsenic Contamination in Groundwater is repaired using said apparatus.
Description
Technical field
The invention belongs to underground water pollution to repair field, more particularly to a kind of device for repairing arsenic pollution in underground water.
The invention further relates to a kind of method that Arsenic Contamination in Groundwater is repaired using said apparatus.
Background technology
Arsenic Contamination in Groundwater seriously affects the drinking water safety problem of the people, drinks the underground water of arsenic pollution and can cause cancer
Disease, such as cutaneum carcinoma, lung cancer and stomach cancer.Arsenic pollution is mainly made up of natural source and two, mankind's activity source aspect, and is polluted
Situation is increasingly serious, especially largely the exploitation of the metal containing arsenic, burning of coal, agricultural chemicals containing arsenic, the use of preservative and arsenic product
Caused potential risk.Urgent need is repaired to the underground water by arsenic pollution, it is ensured that drinking water safety.
The recovery technique of arsenic from underwater pollution at present mainly has flocculation/precipitation method, ion-exchange, membrane technology method, life
Thing method and absorption method etc., wherein membrane technology are considered as one of effective ways of arsenic-containing water processing.Film is with Selective Separation
The material of function, realize that the separation, purifying, the process of concentration of the different component in water body are referred to as film using the Selective Separation of film
Separation.During using film process arsenic polluted water body, due to the crown_interception of film so that be retained down part arsenic in water body
Concentration it is higher, and the processing to high arsenic concentrated water be research emphasis and practical application in facing challenges and main bottleneck.
Zero-valent Iron arsenic removal technology easy-operating technology, is widely paid close attention to as a kind of high efficiency low cost, but its except
The problems such as inefficient, easily hardened during arsenic be present, there can be the problem of wasting when especially arsenic concentration is relatively low.
The content of the invention
It is an object of the invention to provide a kind of device for repairing arsenic pollution in underground water.
It is yet another object of the invention to provide a kind of method that Arsenic Contamination in Groundwater processing is carried out using said apparatus.
To achieve the above object, the device provided by the invention for repairing arsenic pollution in underground water, including pumping system, processing
System and the processing system between pumping system and recharge system；Wherein：
Pumping system：Placement suction pump, suction pump are connected to the pretreating zone of processing system by drinking-water pipe in pumped well,
Suction pump is connected with flow controller；
Processing system includes pretreating zone and treatment region, and wherein pretreating zone is the packed layer of activated carbon and fine sand, pre- place
The water inlet in reason area connects suction pump by drinking-water pipe；The upper end for the treatment of region is provided with Zero-valent Iron supply device, and treatment region lower end is set
Nanometer aeration device is equipped with, one end for the treatment of region is provided with permeable membrane, and the delivery port for the treatment of region is connected to the inverted well of recharge system；
Recharge filler is filled with the inverted well of recharge system.
The device of arsenic pollution in the reparation underground water, wherein, Zero-valent Iron supply device is rotary ejection type supply device.
The device of arsenic pollution in the reparation underground water, wherein, rotary ejection type supply device is arranged at the upper end center for the treatment of region
Region.
The device of arsenic pollution in the reparation underground water, wherein, permeable membrane is milipore filter, microfiltration membranes, reverse osmosis membrane and received
One or more in filter membrane.
The device of arsenic pollution in the reparation underground water, wherein, nanometer aeration device is arranged at the lower end center for the treatment of region
Region, and nanometer aeration plate is horizontal by 15 ° of inclinations.
The device of arsenic pollution in the reparation underground water, wherein, recharge filler is activated carbon, sand, waste iron filing or Zero-valent Iron
The mixture of particle.
The method provided by the invention that Arsenic Contamination in Groundwater is repaired using said apparatus：
According to the direction of Groundwater Flow, pumping system is set in the downstream of Pollution Plume, controlled using suction pump in flow
Underground water is transported to processing system by flow by pumping conduit according to the actual requirements under the regulation of device；
Underground water first passes through the pretreating zone of processing system, ensures the underground into treatment region by the packed layer of pretreating zone
Water water quality, avoids fouling membrane；
The underground water of pretreating zone enters treatment region, and underground water isolate and purify by permeable membrane to form arsenic containing solution,
Zero-valent iron particle is uniformly then knocked down by rotary ejection type supply device by treatment region, while opens nanometer aeration device, nanometer exposes
The corrosion of oxygen boosting Zero-valent Iron caused by device of air, the ferriferous oxide and iron hydroxide to arsenic with removal ability are formed,
Nanometer aeration device produces the bubble stream to be formed and plays stirring action to Zero-valent Iron；
The recharge water that treatment region is formed flow to inverted well, recharge water is handled by the recharge filler in inverted well, really
Protect repairing effect.
Described method, wherein, concentration >=10mg/L of arsenic containing solution.
The present invention, can be by trivalent arsenic oxygen plus nanometer aeration technology using Zero-valent Iron arsenic removal is added after permeable membrane enrichment arsenic
While change, Zero-valent Iron arsenic removal efficiency is improved, prevents that Zero-valent Iron is hardened.
Brief description of the drawings
Fig. 1 is the schematic diagram that the present invention repairs the device of arsenic pollution in underground water.
Fig. 2 is the schematic diagram of rotary ejection type supply device
Fig. 3 is nanometer aeration equipment
Primary clustering symbol description in accompanying drawing：
1 pumped well, 2 screen casings, 3 drinking-water pipes, 4 suction pumps, 5 pretreating zones, 6 rotary ejection type supply devices, 7 nanometer aeration equipment, 8
Permeable membrane, 9 treatment regions, 10 packing layers, 11 inverted wells, 12 apertures, 13 supply device control systems, 14 nanometer aeration machines, 15 nanometers
Aeration board.
Embodiment
The present invention is used for the removal for strengthening arsenic from underwater, depends primarily on permeable membrane, Zero-valent Iron and nanometer aeration and sets
Standby combination and cooperation works, can simply, rapidly and efficiently arsenic pollution in quasi- in-situ remediation of underground water.
The device of arsenic pollution in reparation underground water provided by the invention, including：
Pumping system, it includes suction pump, flow controller, pumping conduit and pumped well, using suction pump in flow control
Underground water is transported to processing system by flow by pumping conduit according to the actual requirements under the regulation of device processed；
Processing system, it includes pretreatment stage and processing stage, and wherein pretreatment stage is mainly filled with activated carbon
With the packed layer of little particle fine sand, effect is to ensure that the quality of groundwater into next stage, avoids fouling membrane；Processing stage master
If being made up of permeable membrane, Zero-valent Iron supply device and nanometer aeration equipment etc., wherein permeable membrane main function is will to flow through processing
The arsenic pollution underground water of system carries out separation and purification treatment, the arsenic solution (>=10mg/L) of high concentration is formed, followed by zero
Zero-valent iron particle is knocked down conversion zone by valency iron supply device, while opens nanometer aeration device, and the arsenic containing solution of high concentration is entered
Row processing.
Recharge system, it includes inverted well and recharge filler, and recharge filler mainly contains waste iron filing or zero-valent iron particle, work
Property charcoal and sand mixture, main function be to recharge water carry out advanced treating, it is ensured that repairing effect.
As optimal technical scheme, the permeable membrane mainly includes low-pressure membrane, such as milipore filter and microfiltration membranes low-pressure membrane, but
For some developed areas, can select to use high-pressure membrane, such as reverse osmosis membrane and NF membrane
As optimal technical scheme, the Zero-valent Iron supply device is rotary ejection type supply device, in the upper end of conversion zone
Heart district domain, iron powder uniformly can be added to conversion zone, avoid directly adding caused particle aggregation.
As optimal technical scheme, the nanometer aeration device is located at the lower end central area of conversion zone, nanometer aeration
On the one hand oxygen caused by device can strengthen the corrosion of Zero-valent Iron, it is quick formed the ferriferous oxide to arsenic with removal ability and
Iron hydroxide, on the other hand, the bubble stream of formation can play stirring action to Zero-valent Iron, be prevented during strengthening corrosion
Caking, and for the higher solution of trivalent arsenic concentration, it is necessary to be aerated in advance, for part trivalent arsenic to be oxidized to pentavalent arsenic.
The theoretical foundation and the deficiency of existing process that the present invention reacts according to iron arsenic, there is provided a kind of Alternative joint is repaired
The combination unit of underground water pollution, the concentrated water problem after permeable membrane PROCESS FOR TREATMENT arsenic pollution can be overcome, while zero can be overcome
The problem of hardened and efficiency of valency iron process is low, treatment effeciency of the device to arsenic is significantly improved, reduce processing cost.
Below in conjunction with drawings and examples, the present invention is described in detail.
The device of arsenic pollution is in the reparation underground water of the present invention：
According to the direction of Groundwater Flow, pumping system is set in the downstream of Pollution Plume, the pumping system includes pumped well
1st, screen casing 2, drinking-water pipe 3 and suction pump 4.The depth of pumped well 1 is to be located at target water-bearing layer, and the pipe diameter of pumped well is 50-
200mm, screen pack is enclosed with outside screen casing, prevents screen casing and the blockage that draws water, screen casing 2 are located at 1- below the water level of water-bearing layer
5m, length 1.5-6.5m.Suction pump 4 is located at the well head of pumped well 1, and dry point is located at the centre of the screen casing 2 of the bottom of pumped well 1
Position.Its effect is will to be evacuated in the first order reaction area 5 of processing system to be handled by the underground water of arsenic pollution.
For processing system between pumping system and recharge system, the processing system includes pretreating zone 5 and treatment region 9,
Pretreating zone 5 is mainly according to activated carbon and little particle fine sand according to mass ratio 60-70:30-40 is filled, and treatment region 9 mainly wraps
Include rotary ejection type supply device 6, nanometer aeration equipment 7 and permeable membrane 8.The bottom surface of rotary ejection type supply device 6 offers aperture 12, rotary ejection type
The top of supply device 6 is provided with supply device control system 13, and the effect of the supply device control system 13 is in order to which iron powder is uniform
Conversion zone is added to, avoids directly adding caused particle aggregation.
After arsenic pollution underground water is pumped down to pretreating zone 5, pre-processed before this by packed layer, by underground water
Colloid or organic matter etc. get rid of, then current enter processing region, and high concentration is formed in treatment region 9 by permeable membrane 8
Arsenic-containing water.After the arsenic concentration in high concentration arsenic-containing water reaches 10ppm, particle Zero-valent Iron is thrown using rotary ejection type supply device 6
Enter in treatment region 9, while open nanometer aeration equipment 7 and be aerated, first exposed before Zero-valent Iron is added if arsenic is trivalent arsenic
Gas, Zero-valent Iron then being added again, if arsenic is pentavalent arsenic, need not being aerated in advance, institute's aerator body is ozone either oxygen.Receive
Rice aerator 7 is made up of nanometer aeration machine 14 and nanometer aeration plate 15, and nanometer aeration plate 15 therein inclines horizontal by 15 °
Tiltedly.
Recharge system is located at after processing system, and the recharge system includes packing layer 10 and inverted well 11.Packing layer is main
It is to be pressed by the mixture of waste iron filing or zero-valent iron particle, activated carbon and sand, wherein waste iron filing or zero-valent iron particle, activated carbon and sand
Mass ratio 20-40:20-60:20-40 is mixed, and the iron-carbon micro-electrolysis system of formation can be to the organic matter in underground water either
Inorganic matter etc. is handled, and plays the effect of advanced treating.
The method of arsenic pollution is in present invention reparation underground water：
The underground water of the pollution for pumped of drawing water flows to pretreating zone with certain flow, is pre-processed, by underground water
Colloid and organic matter etc. remove；Treatment region is then flowed through, pollutant is handled by permeable membrane and zero-valent iron technology, handled
Water carries out advanced treating by the waste iron filing or zero-valent iron particle of inverted well, the mixture packing layer of activated carbon and sand.Through too deep
Current after degree processing go back to the same water-bearing layer in underground.
The prosthetic device of the heavy metal pollution underground water of the present invention is equivalent to external a set of water circulation path, downstream
After lower water is extracted, inverted well treated water in upstream can supplement in time, it is ensured that waterflow stabilization, reduce to groundwater environment
Disturbance.
Embodiment 1
It is 105 μ g/L that heavy metal arsenic pollution concentration in underground water is extracted in certain northern agricultural production area, which out, according to Regional Hydrologic
Matter data to arrange result, the well depth 22m that draws water is designed, a diameter of 96mm of well casing, screen casing length is 4.5m, below water level face
3.0m；The activated carbon and little particle fine sand in mass ratio 65 of pretreating zone filling:35 fill, and permeable membrane is micro- for business in treatment region
Filter membrane, nanometer aeration equipment expose oxygen, and rotary ejection type supply device is aperture 0.5cm, is in mass ratio 25:50:25 are filled with particle diameter 20-
50mm waste iron filings, activated carbon and sand.Whole device is drawn water when running for batch (-type), is stopped pumping after the 4h that draws water, is added Zero-valent Iron
While open nanometer aeration equipment.In operation 50 days.Average day processing water is 100m3, heavy metal arsenic concentration in underground water
1.4 μ g/L are reduced to, the clearance of heavy metal is 98.7%.
Embodiment 2
It is 408 μ g/L that heavy metal arsenic pollution concentration in underground water is extracted in certain northern agricultural production area, which out, according to Regional Hydrologic
Matter data to arrange result, design are drawn water well depth 14m, and a diameter of 104mm of well casing, screen casing length is 3.5m, positioned at water level face with
Lower 2.0m；The activated carbon and little particle fine sand in mass ratio 70 of pretreating zone filling:30 fill, and permeable membrane is business in treatment region
Microfiltration membranes, nanometer aeration equipment expose oxygen, and rotary ejection type supply device is aperture 0.5cm, is in mass ratio 30:40:30 are filled with particle diameter
10-50mm waste iron filings, activated carbon and sand.Whole device is drawn water when running for batch (-type), is stopped pumping after the 2h that draws water, is added zeroth order
Nanometer aeration equipment is opened while iron.In operation 60 days.Average day processing water is 80m3, heavy metal arsenic concentration in underground water
2.1 μ g/L are reduced to, the clearance of heavy metal is 99.5%.
Claims (8)
1. a kind of device for repairing arsenic pollution in underground water, including pumping system, processing system and positioned at pumping system and recharge
Processing system between system；Wherein：
Pumping system：Placement suction pump, suction pump are connected to the pretreating zone of processing system by drinking-water pipe, drawn water in pumped well
Pump is connected with flow controller；
Processing system includes pretreating zone and treatment region, and wherein pretreating zone is the packed layer of activated carbon and fine sand, pretreating zone
Water inlet suction pump is connected by drinking-water pipe；The upper end for the treatment of region is provided with Zero-valent Iron supply device, and treatment region lower end is provided with
Nanometer aeration device, one end for the treatment of region are provided with permeable membrane, and the delivery port for the treatment of region is connected to the inverted well of recharge system；
Recharge filler is filled with the inverted well of recharge system.
2. the device of arsenic pollution in underground water is repaired according to claim 1, wherein, Zero-valent Iron supply device adds for rotary ejection type
Device.
3. the device of arsenic pollution in underground water is repaired according to claim 2, wherein, rotary ejection type supply device is arranged at treatment region
Central upper portion region.
4. repair the device of arsenic pollution in underground water according to claim 1, wherein, permeable membrane is milipore filter, microfiltration membranes, anti-
One or more in permeable membrane and NF membrane.
5. the device of arsenic pollution in underground water is repaired according to claim 1, wherein, nanometer aeration device is arranged at treatment region
Lower central area, and nanometer aeration plate horizontal by 15 ° inclination.
6. the device of arsenic pollution in underground water is repaired according to claim 1, wherein, recharge filler is activated carbon, sand, scrap iron
The mixture of bits or zero-valent iron particle.
7. the method for Arsenic Contamination in Groundwater is repaired using claim 1 described device：
According to the direction of Groundwater Flow, pumping system is set in the downstream of Pollution Plume, using suction pump in flow controller
Underground water is transported to processing system by flow by pumping conduit according to the actual requirements under regulation；
Underground water first passes through the pretreating zone of processing system, ensures the Groundwater into treatment region by the packed layer of pretreating zone
Matter, avoid fouling membrane；
The underground water of pretreating zone enters treatment region, underground water isolate and purify by permeable membrane forms arsenic containing solution, then
Zero-valent iron particle is uniformly knocked down by rotary ejection type supply device by treatment region, while opens nanometer aeration device, nanometer aeration dress
The corrosion of oxygen boosting Zero-valent Iron, forms the ferriferous oxide and iron hydroxide to arsenic with removal ability, nanometer caused by putting
Aerator produces the bubble stream to be formed and plays stirring action to Zero-valent Iron；
The recharge water that treatment region is formed flow to inverted well, recharge water is handled by the recharge filler in inverted well, it is ensured that repair
Multiple effect.
8. the method according to claim 11, wherein, concentration >=10mg/L of arsenic containing solution.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111362390A (en) * | 2020-03-26 | 2020-07-03 | 中国科学院生态环境研究中心 | Method for enhancing arsenic removal effect of nano zero-valent iron by regulating oxygen content |
| CN111470671A (en) * | 2020-04-16 | 2020-07-31 | 山东省科学院激光研究所 | Method for treating arsenic-containing organic wastewater |
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