CN106946307B - Arsenic removal device with monitoring and regeneration functions and use method thereof - Google Patents
Arsenic removal device with monitoring and regeneration functions and use method thereof Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/00—Treatment of water, waste water, or sewage
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- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
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Abstract
The invention belongs to the technical field of water treatment, and particularly relates to an arsenic removal device with monitoring and regeneration functions and a using method thereof. The arsenic removal device consists of a main body, a regeneration system, a monitoring system and a power control system. The main body is a fixed bed processor provided with an inner core made of cloth-shaped arsenic adsorption fiber materials, the arsenic removal inner core is made of the cloth-shaped arsenic adsorption fiber materials, the arsenic removal inner core is formed by rolling and folding the cloth-shaped arsenic adsorption fiber materials around a central shaft, the arsenic removal inner core is cylindrical in shape, the layers are overlapped tightly, the arsenic removal inner core is vertically arranged in the shell, and no gap exists between the cloth-shaped arsenic adsorption fibers and between the arsenic removal inner core and the inner wall of the shell; the regeneration system consists of a regeneration liquid tank, a pump valve and a pipeline; the monitoring system consists of a quartz column filled with a rapid arsenic detection reagent and a comparison column. The arsenic removal device has the advantages of good water permeability, high arsenic removal efficiency, easiness in desorption regeneration and the like, can monitor the concentration of arsenic in effluent in real time, and provides an indication for desorption regeneration while ensuring that the effluent reaches the discharge standard.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to an arsenic removal device with monitoring and regeneration functions and a using method thereof.
Background
The arsenic pollution of the water body seriously affects the environmental safety and threatens the health of people. At present, technologies for removing arsenic from water mainly comprise a coagulating sedimentation method, an adsorption method, a reverse osmosis method and the like. The coagulating sedimentation method is suitable for water bodies with higher arsenic concentration, and the water bodies containing arsenic with medium and low concentrations are difficult to meet the treatment requirements, so the coagulating sedimentation method is usually used as a pretreatment process of arsenic-containing wastewater. The reverse osmosis method has high cost, large energy consumption, more complex operation and higher requirement on water inflow, and is not suitable for treating industrial wastewater or large-scale natural water bodies. The adsorption method takes an insoluble solid material with high specific surface area as an adsorbent, and arsenic in a water body is fixed on the surface of the adsorbent through physical adsorption, chemical adsorption or ion exchange, so that the arsenic is separated from the water. The adsorption method is simple and easy to implement, has low cost, and is suitable for large-scale treatment of middle-and low-concentration arsenic-containing wastewater and arsenic-polluted natural water.
At present, the most common adsorption method is a fixed bed type adsorption reactor, and granular arsenic removal filter materials are generally selected as adsorbents. The granular arsenic removing filter material comprises activated alumina balls, activated carbon granules, porous oxide granules (such as oxides of iron, titanium and zirconium) and the like, and has the common problems that the water permeability of the material is poor, gaps among the granules are large after filling, most of water passes through the gaps, and only a small part of the water passes through the inside of the filter material. This phenomenon of preferential passage of water through the gaps, like a "short circuit", occurs to make the fixed bed reactor more easily permeable. Meanwhile, the granular arsenic removal filter material has poor water permeability and is difficult to desorb and regenerate, so the granular arsenic removal filter material can be used only once and then is treated as solid waste.
The problems cause the granular arsenic-removing filter material to have low effective adsorption quantity, short service life and large solid waste generation quantity, so the comprehensive cost is very high. Moreover, the detection of arsenic is relatively complex, the requirement on equipment is relatively high, online monitoring cannot be achieved frequently, and the arsenic removal effect is difficult to ensure that the arsenic is up to the standard and fed back in time. The application and popularization of the arsenic removal technology by the adsorption method are hindered because the supervision department or the user is difficult to timely judge whether the effluent is stable and reaches the standard.
In conclusion, the existing arsenic removal technology by the adsorption method has the problems of high cost, large solid waste amount, difficult real-time monitoring of treatment effect and the like, and the development of a more economical, safer and controllable arsenic removal method is urgent.
Disclosure of Invention
The invention provides an arsenic removal device with monitoring and regeneration functions and a using method thereof, the device well solves the problems of difficult regeneration, large solid waste amount and high use cost of the existing fixed bed arsenic adsorption device, and can realize remote monitoring without field operation and nursing of special personnel.
The technical scheme of the invention is as follows:
the utility model provides a take monitoring and regeneration function's arsenic removal device, adopts cloth form arsenic adsorption fiber material preparation to remove the arsenic inner core, removes the arsenic inner core and is formed by cloth form arsenic adsorption fiber material around the center pin book pile, and its shape is the cylinder, and the coincide closely between the layer, vertical installation in the shell, between cloth form arsenic adsorption fiber and remove arsenic inner core and shell inner wall zero clearance.
The arsenic removal device with the monitoring and regenerating functions is used for manufacturing a cloth-shaped arsenic adsorption fiber material of an inner core, and is formed by pressing or weaving glass fibers or activated carbon fibers into cloth and loading at least one of magnesium-based, titanium-based, iron-based, manganese-based and rare earth-based inorganic non-metal nano materials, wherein the inorganic non-metal nano materials in the cloth-shaped arsenic adsorption fiber material account for 5-50 wt%; the porosity of the cloth-shaped arsenic adsorption fiber material is 30-80%, the average pore diameter of the macropores is 5-100 mu m, and the average pore diameter of the micropores is 0.005-1 mu m.
The use method of the arsenic removal device with monitoring and regeneration functions comprises the steps that the arsenic removal device is used as a fixed bed arsenic processor, arsenic-containing water flows through a quartz column filled with an arsenic rapid detection reagent when being discharged after being treated by a fixed bed, and whether the arsenic-containing water reaches the standard or not is judged through comparing with a comparison column; if the standard is met, the discharge is normal; if the standard is not met, the operation is stopped, and the desorption regeneration process is carried out.
According to the use method of the arsenic removal device with the monitoring and regeneration functions, when the cloth-shaped arsenic adsorption fiber material is saturated or the concentration of the arsenic in the effluent is not up to the standard, the regeneration liquid is used for activation and then is put into use again, and the whole process does not need to be disassembled and assembled; the regeneration liquid is strong alkaline solution with the concentration of 0.1-8 wt%, strong acid solution with the concentration of 1-10 wt% or salt solution with the concentration of 0.5-20 wt%.
The use method of the arsenic removal device with monitoring and regeneration functions comprises the steps that the strong alkaline solution is an aqueous solution of sodium hydroxide, sodium carbonate, sodium hypochlorite or potassium hydroxide, the strong acid solution is an aqueous solution of sulfuric acid or hydrochloric acid, and the salt solution is an aqueous solution of sodium chloride, potassium chloride, sodium phosphate or sodium hydrogen phosphate.
The use method of the arsenic removal device with monitoring and regeneration functions comprises the steps that three identical arsenic rapid detection reagent columns are arranged at the water outlet side by side, one of the columns is communicated with the water outlet pipe of the arsenic removal device main body, and the other two columns are respectively sealed after reaching adsorption balance in different arsenic-containing solutions and serve as comparison columns; judging whether the arsenic concentration in the effluent is close to or exceeds the arsenic concentration in the comparison column through color; the rapid arsenic detection reagent is a cerium oxide-based nano material, and the equilibrium concentration of an arsenic-containing solution in the comparison column is 100-500 ppb.
According to the use method of the arsenic removal device with the monitoring and regeneration functions, the water outlet at the upper end of the arsenic removal device is provided with the air inlet, after desorption or cleaning is completed, the lower outlet is opened, compressed air is introduced from the air inlet, and desorption liquid and cleaning liquid are separated from the cloth-shaped arsenic adsorption fiber material under the dual effects of gravity and airflow, so that the consumption of the desorption liquid and the water consumption for cleaning are reduced.
The use method of the arsenic removal device with the monitoring and regeneration functions has the advantages that the whole arsenic removal process is simple and reliable, the operation of personnel is not needed, and the monitoring system is utilized to realize visual monitoring and operation.
The use method of the arsenic removal device with monitoring and regeneration functions has the advantage that the arsenic removal rate is more than 99% under the conditions that the retention time is 0.5-10 min and the arsenic concentration of raw water is less than or equal to 20 ppm.
The use method of the arsenic removal device with monitoring and regeneration functions comprises the following steps: a. dewatering, namely closing the water inlet valve, then opening the air inlet valve, injecting compressed air from top to bottom, and dewatering the cloth-shaped arsenic adsorption fiber material by utilizing the dual functions of gravity and airflow; b. arsenic elution, namely after dehydration is finished, injecting desorption liquid and enabling the desorption liquid to circularly flow through the cloth-shaped arsenic adsorption fiber material, and introducing air for dehydration after the desorption requirement is met; c. and (4) after washing for 2-3 times by using clear water, finishing a desorption regeneration process, and putting the cloth-shaped arsenic adsorption fiber material into use again.
The design idea of the invention is as follows:
the invention mainly designs an arsenic removal device with monitoring and regeneration functions, and the design idea of the device is as follows: 1. the cloth-shaped arsenic adsorption fiber material with rich and uniform pores, easy desorption and regeneration and rich arsenic removal functional groups is rolled into an inner core and is arranged in a processor to be used as an arsenic adsorption functional main body. The arsenic removal main body has excellent water permeability and water flow uniformity, can ensure that the material is fully contacted with water, and realizes stable and efficient arsenic removal; 2. the method comprises the following steps of taking a quartz column filled with an arsenic rapid detection reagent and a comparison column as indicators, measuring the arsenic concentration of water flowing through by monitoring the chromaticity of the quartz column on line and comparing the chromaticity with the chromaticity of the comparison column, so as to realize on-line monitoring of the arsenic concentration of the treated water; 3. when the arsenic concentration in the effluent water exceeds the standard or is about to exceed the standard, the monitoring system immediately gives an early warning, an order is sent to the regeneration system through a remote control system or an automatic control system, in-situ desorption regeneration is carried out on the adsorption material in the device, and the arsenic removal device can be put into use again after regeneration is completed.
The invention has the following advantages and beneficial effects:
1. the cloth-shaped arsenic adsorption fiber material used by the invention is a porous material, and the arsenic removal inner core rolled by the cloth-shaped arsenic adsorption fiber material has the advantages of good water permeability, uniform water flow, full contact with water and the like, and does not have the problem of short circuit caused by gaps among particle materials, thereby having higher arsenic removal efficiency. Meanwhile, as the material is more fully contacted with water, desorption and regeneration of the material are easier to carry out.
2. The invention can monitor the arsenic concentration in the treated water on line, overcomes the problem that the prior arsenic removal equipment is difficult to detect the effluent in time, and improves the reliability and the supervision degree of treatment.
3. When the concentration of the discharged arsenic is close to the standard exceeding the standard, the regeneration system can be used for desorbing and regenerating the material by using a remote control or automatic control system, so that the recycling is realized. Therefore, the material cost and the solid waste generation amount can be greatly reduced.
4. The device is a novel fixed bed reactor, uses a cloth-shaped arsenic adsorption fiber material with rich and uniform pores as an arsenic adsorbent, has the advantages of high arsenic removal efficiency, easy regeneration and the like, and can utilize a self-contained monitoring system to perform online monitoring on the arsenic concentration in water treated by the arsenic removal device. When the arsenic concentration in the effluent water is over the standard or is about to exceed the standard, the monitoring system of the device can quickly give an early warning, so that the in-situ desorption regeneration of the adsorption material in the device is conveniently carried out by utilizing the regeneration system of the device.
5. The cloth-shaped arsenic adsorption fiber material has rich and uniform pores, rich arsenic removal functional groups, easy water passing and full contact with the material, and can realize rapid and efficient arsenic removal. Under the conditions that the retention time is 0.5-10 min and the arsenic concentration of raw water is less than or equal to 20ppm, the arsenic removal rate can reach more than 99%.
Drawings
FIG. 1 is a schematic structural diagram of an arsenic removal device with monitoring and regeneration functions according to the invention. In the drawings, the reference numerals and reference numeral names of the respective portions are: 1. raw water tank, 2 raw water pump, 3 fixed bed processor, 4 arsenic removing inner core, 5 arsenic rapid detector, 6 arsenic rapid detection reagent column, 7 comparison column I, 8 comparison column II, 9 comparison column II, water outlet tank, 10 drainage pump/back flush pump, 11 regeneration liquid tank, 12 regeneration liquid pump, 13 air compressor.
Detailed Description
As shown in figure 1, the arsenic removal device with monitoring and regeneration functions of the invention comprises a main body, a regeneration system, a monitoring system and a power control system, wherein the main body is a fixed bed processor 3 provided with an arsenic removal inner core 4 made of cloth-shaped arsenic adsorption fiber materials, the regeneration system comprises a regeneration liquid tank, a pump valve and a pipeline, the monitoring system comprises a quartz column and a comparison column which are provided with arsenic rapid detection reagents, and the specific structure is as follows:
an arsenic removal inner core 4 is arranged in the fixed bed processor 3, the fixed bed processor 3 is connected with the raw water tank 1 through a pipeline, and a raw water pump 2 is arranged on the pipeline. The fixed bed processor 3 is connected with an arsenic rapid detector 5 through a pipeline, an arsenic rapid detection reagent column 6, a comparison column I7 and a comparison column II 8 are arranged in the arsenic rapid detector 5, the arsenic rapid detector 5 is connected with a water outlet tank 9 through a pipeline, and the water outlet tank 9 is connected with a drainage pump/backwashing pump 10 through a pipeline. A drain/backwash pump 10 is connected to the top of the fixed bed processor 3 by a line which in turn is connected to a regeneration liquid pump 12 by a line which is further connected to an air compressor 13 by a line. The bottom of the fixed bed processor 3 is connected with a regeneration liquid tank 11 through a pipeline, and the regeneration liquid tank 11 is connected with a regeneration liquid pump 12 through a pipeline.
The arsenic removal device has the advantages of good water permeability, high arsenic removal efficiency, easiness in desorption regeneration and the like, can monitor the concentration of arsenic in effluent in real time, and provides an indication for desorption regeneration while ensuring that the effluent reaches the discharge standard.
The device of the invention is implemented as follows: 1) cloth-shaped high-efficiency arsenic adsorption fibers are used as arsenic removal materials, are rolled around a central shaft to form a compact inner core, and are vertically arranged in a shell to form a fixed bed arsenic treater; 2) when the arsenic-containing water is discharged after being treated by the fixed bed, the arsenic-containing water flows through a quartz column filled with an arsenic rapid detection reagent, and whether the arsenic-containing water reaches the standard is judged by comparing the arsenic-containing water with a comparison column, if the arsenic-containing water reaches the standard, the arsenic-containing water is normally discharged, and if the arsenic-containing water does not reach the standard, the arsenic-containing water is stopped to run, and a; 3) the desorption regeneration process comprises the following steps: a. dewatering, namely closing the water inlet valve, then opening the air inlet valve, injecting compressed air from top to bottom, and dewatering the cloth-shaped arsenic adsorption fiber material by utilizing the dual functions of gravity and airflow; b. arsenic elution, namely after dehydration is finished, injecting desorption solution (the desorption solution is one or a mixed solution of more than two of sodium hydroxide solution, sodium hypochlorite solution and phosphate solution) and enabling the desorption solution to circularly flow through materials, and then, introducing air for dehydration after desorption requirements are met; c. and (4) after washing for 2-3 times by using clear water, finishing a desorption regeneration process, and putting the material into use again. To reduce water usage, dewatering was performed after each rinse.
The present invention will be described in further detail with reference to examples.
Example 1
In this embodiment, the cloth-like arsenic-adsorbing fiber material used for making the inner core is activated carbon fiber cloth modified by magnesium ferrite nanoparticles (the magnesium ferrite nanoparticles in the cloth-like arsenic-adsorbing fiber material account for 15 wt%), the porosity of the cloth-like arsenic-adsorbing fiber material is 65%, the average pore diameter of the macropores is 5 to 50 μm, and the average pore diameter of the micropores is 0.005 to 0.2 μm. And (3) filling an arsenic removal inner core with the diameter of 200mm multiplied by 1000mm into a shell to prepare a fixed bed arsenic treater, wherein the fixed bed arsenic treater is communicated with an arsenic-containing water tank to be treated and a desorption regeneration system. The arsenic rapid detection reagent column and the 100ppb and 500ppb comparison columns are respectively arranged side by side, wherein the arsenic rapid detection reagent column is connected with the water outlet of the fixed bed arsenic processor.
Arsenic-containing wastewater with pH value of 6.5 and total arsenic concentration of 7.1ppm is used as raw water, arsenic removal test is carried out, and water flow is controlled at 200L/h. When the running time is within 32h, the chromaticity of the arsenic rapid detection reagent column is lower than 100ppb of a contrast column; when the operation time is between 32h and 44h, the chromaticity of the arsenic rapid detection reagent column is between 100ppb contrast column and 500ppb contrast column; when the running time is 45h, the chroma of the arsenic rapid detection reagent column is equivalent to that of a 500ppb contrast column. At this time, the operation is stopped after the water sample is taken. Tests show that the concentration of arsenic in the effluent after 45 hours of operation is 541ppb, which exceeds 500ppb specified by emission standards. Therefore, desorption and regeneration are required before the catalyst can be put into use again.
And (3) selecting 40L of sodium hydroxide aqueous solution with the mass fraction of 1% to desorb and regenerate the arsenic removal material, circularly eluting for 30min, washing for 3 times by using clear water, and then putting the arsenic removal material into use again, wherein the water flow is still 200L/h. The effective operation time of the processor after desorption regeneration is 38h, which is 84.4% of the original operation time. The desorption regeneration frequency of the arsenic removal material can reach more than 20 times, and after the material is repeatedly used and desorbed and regenerated for 5 times, the arsenic removal performance of the material is stabilized at about 70 percent of that of a new material.
Example 2
In the embodiment, the cloth-shaped arsenic adsorption fiber material used for manufacturing the inner core is a glass fiber non-woven fabric loaded with nano metatitanic acid (the nano metatitanic acid in the cloth-shaped arsenic adsorption fiber material accounts for 11.2 wt%, the porosity of the cloth-shaped arsenic adsorption fiber material is 75%, the average pore diameter of a large pore is 10-100 μm, and the average pore diameter of a micropore is 0.01-0.5 μm, the arsenic removal inner core with the diameter of 200mm multiplied by 1000mm is arranged in a shell to manufacture the fixed bed arsenic processor, the fixed bed processor is communicated with an arsenic-containing water tank to be processed and a desorption regeneration system, the arsenic rapid detection reagent column and the comparison columns with the diameters of 100ppb and 500ppb are respectively arranged side by side, and the arsenic rapid detection reagent column is connected with a water outlet of the fixed bed arsenic processor.
Arsenic-containing wastewater with a pH value of 7.2 and a total arsenic concentration of 1.83ppm is used as raw water to perform an arsenic removal test, and the water flow is controlled at 250L/h. When the running time is within 152h, the chromaticity of the arsenic rapid detection reagent column is lower than 100ppb of a contrast column; when the operation time is between 152h and 197h, the chromaticity of the arsenic rapid detection reagent column is between 100ppb contrast column and 500ppb contrast column; when the running time is 198h, the chroma of the arsenic rapid detection reagent column is equivalent to that of a 500ppb contrast column. At this time, the operation is stopped after the water sample is taken. The test shows that the arsenic concentration in the effluent after 198 hours of operation is 503ppb, which exceeds 500ppb specified by the emission standard. Therefore, desorption and regeneration are required before the catalyst can be put into use again.
And (3) selecting 40L of sodium phosphate aqueous solution with the mass fraction of 0.5% for desorption regeneration, circulating for 60min, washing for 3 times by using clear water, and then putting into use again. The water flow is still 250L/h. The effective operation time of the processor after desorption regeneration is 176h, and the processing capacity is 88.9 percent of the original capacity. The desorption frequency of the material can reach more than 30 times, and after the material is repeatedly used and desorbed and regenerated for 4 times, the processing capacity of the material is stabilized to about 75 percent of that of a new material.
The results of the embodiment show that the arsenic removal device prepared by the method can be used for not only quickly and efficiently treating the water containing arsenic, but also accurately monitoring the concentration of the arsenic in the treated water on line, and is beneficial to improving the treatment reliability and the supervision degree. Meanwhile, according to the condition of on-line monitoring, the arsenic removal material can be regenerated at a proper time, so that the material cost is reduced, and the generation amount of arsenic-containing solid waste is reduced. Therefore, the invention provides a more economical, safe and controllable arsenic removal method.
Claims (1)
1. The use method of the arsenic removal device with monitoring and regeneration functions is characterized in that a cloth-shaped arsenic adsorption fiber material is adopted to manufacture an arsenic removal inner core, the arsenic removal inner core is formed by rolling and folding the cloth-shaped arsenic adsorption fiber material around a central shaft, the shape of the arsenic removal inner core is cylindrical, the layers are tightly overlapped and vertically arranged in a shell, and no gap exists between the cloth-shaped arsenic adsorption fibers and between the arsenic removal inner core and the inner wall of the shell;
the cloth-shaped arsenic adsorption fiber material for manufacturing the inner core is prepared by pressing or weaving glass fiber or activated carbon fiber into cloth and loading at least one of magnesium-based, titanium-based, iron-based, manganese-based and rare earth-based inorganic non-metal nano materials, wherein the inorganic non-metal nano materials in the cloth-shaped arsenic adsorption fiber material account for 5-50 wt%; the porosity of the cloth-shaped arsenic adsorption fiber material is 30-80%, the average pore diameter of a macropore is 5-100 mu m, and the average pore diameter of a micropore is 0.005-1 mu m;
the use method of the arsenic removal device with monitoring and regeneration functions comprises the steps that the arsenic removal device is used as a fixed bed arsenic processor, arsenic-containing water flows through a quartz column filled with an arsenic rapid detection reagent when being discharged after being treated by a fixed bed, and whether the arsenic-containing water reaches the standard or not is judged through comparing with a comparison column; if the standard is met, the discharge is normal; if the standard is not met, stopping running and entering a desorption regeneration process;
when the cloth-shaped arsenic adsorption fiber material is saturated or the concentration of the arsenic in the effluent is not up to the standard, the regeneration liquid is used for activation and then is put into use again, and the whole process does not need to be disassembled and assembled; the regeneration liquid is strong alkaline solution with the concentration of 0.1-8 wt%, strong acid solution with the concentration of 1-10 wt% or salt solution with the concentration of 0.5-20 wt%;
the strong alkaline solution is an aqueous solution of sodium hydroxide, sodium carbonate, sodium hypochlorite or potassium hydroxide, the strong acid solution is an aqueous solution of sulfuric acid or hydrochloric acid, and the salt solution is an aqueous solution of sodium chloride, potassium chloride, sodium phosphate or sodium hydrogen phosphate;
three identical arsenic rapid detection reagent columns are arranged at the water outlet side by side, one of the arsenic rapid detection reagent columns is communicated with the water outlet pipe of the arsenic removal device main body, and the other two arsenic rapid detection reagent columns are respectively sealed after reaching adsorption balance in different arsenic-containing solutions and serve as comparison columns; judging whether the arsenic concentration in the effluent is close to or exceeds the arsenic concentration in the comparison column through color; the rapid arsenic detection reagent is a cerium oxide-based nano material, and the equilibrium concentration of an arsenic-containing solution in the comparison column is 100-500 ppb;
the water outlet at the upper end of the arsenic removal device is provided with an air inlet, after desorption or cleaning is completed, the lower outlet is opened, compressed air is introduced from the air inlet, and desorption liquid and cleaning liquid are separated from the cloth-shaped arsenic adsorption fiber material under the dual actions of gravity and airflow, so that the consumption of the desorption liquid and the water consumption for cleaning are reduced;
the whole arsenic removal process is simple and reliable, does not need to be operated by personnel, and realizes visual monitoring and operation by using a monitoring system;
under the conditions that the retention time is 0.5-10 min and the arsenic concentration of raw water is less than or equal to 20ppm, the arsenic removal rate reaches more than 99 percent;
the desorption regeneration process comprises the following steps: a. dewatering, namely closing the water inlet valve, then opening the air inlet valve, injecting compressed air from top to bottom, and dewatering the cloth-shaped arsenic adsorption fiber material by utilizing the dual functions of gravity and airflow; b. arsenic elution, namely after dehydration is finished, injecting desorption liquid and enabling the desorption liquid to circularly flow through the cloth-shaped arsenic adsorption fiber material, and introducing air for dehydration after the desorption requirement is met; c. and (4) after washing for 2-3 times by using clear water, finishing a desorption regeneration process, and putting the cloth-shaped arsenic adsorption fiber material into use again.
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| CN102600790A (en) * | 2011-01-20 | 2012-07-25 | 中国科学院金属研究所 | Nanometer cerium oxide hydrate-based arsenic removing material, preparation method thereof and application in arsenic removing |
| CN102755872A (en) * | 2011-04-25 | 2012-10-31 | 中国科学院金属研究所 | Diplopore-structured arsenic adsorption material and preparation method thereof |
| CN204714551U (en) * | 2015-06-12 | 2015-10-21 | 余元华 | Polluted-water self-purging stake |
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| CN102600790A (en) * | 2011-01-20 | 2012-07-25 | 中国科学院金属研究所 | Nanometer cerium oxide hydrate-based arsenic removing material, preparation method thereof and application in arsenic removing |
| CN102755872A (en) * | 2011-04-25 | 2012-10-31 | 中国科学院金属研究所 | Diplopore-structured arsenic adsorption material and preparation method thereof |
| CN204714551U (en) * | 2015-06-12 | 2015-10-21 | 余元华 | Polluted-water self-purging stake |
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