CN102718281A - Method for treating low-temperature low-turbidity high-color water by adopting modified palygorskite flocculation adsorbent - Google Patents
Method for treating low-temperature low-turbidity high-color water by adopting modified palygorskite flocculation adsorbent Download PDFInfo
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- 238000005189 flocculation Methods 0.000 title claims abstract description 70
- 230000016615 flocculation Effects 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000003463 adsorbent Substances 0.000 title abstract 4
- 229910052625 palygorskite Inorganic materials 0.000 title abstract 4
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- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims description 8
- 229920001661 Chitosan Polymers 0.000 claims description 7
- 230000006196 deacetylation Effects 0.000 claims description 7
- 238000003381 deacetylation reaction Methods 0.000 claims description 7
- 239000004021 humic acid Substances 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
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- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention relates to a method for treating low-temperature low-turbidity high-color water, in particular relates to a method for treating low-temperature low-turbidity high-color water by adopting modified palygorskite flocculation adsorbent, and aims at solving the problem that the existing method for treating low-temperature low-turbidity high-color water has low treatment efficiency, poor treatment effect and is not environment-friendly. The method comprises the steps of: firstly feeding compound aluminum and ferrum, and modified palygorskite flocculation adsorbent in a mixing pit with a low-temperature low-turbidity high-color water high-density sedimentation basin, and treating by adopting the modified palygorskite flocculation adsorbent or return sludge as a carrier under conditions of certain sludge return ratio, pH, bottom sludge concentration, stirring speed of a flocculation basin and the revolving speed of a sludge scraper, thus obtaining low-temperature low-turbidity high-color water at the water outlet of the high-density sedimentation basin. The method is mainly used for treating low-temperature low-turbidity high-color water.
Description
Technical field
The present invention relates to a kind of treatment process of low-temperature and low turbidity high luminance relay water.
Background technology
Most of extremely frigid zones such as China northeast and northwest have 6 months freezeup period nearly; It is high that the low temperature season water body self-purification ability is poor, the water source causes look organic substance humic acid class substances content; It not only can influence colourity, smell, the mouthfeel of water body, but also can make the stability of inorganic particle, heavy metal even nonionic organic cpds in the water body increase through surface adsorption or surface complexation effect; In addition; Humic acid is the precursor of the stronger MX of toxicity [3-chloro-4 (dichloromethyl)-5 hydroxyl-2 (5H)-furanone]; And in the prechlorination process, can produce the organochlorine DBPs in generation (DPBs); Intractability is big, relies on conventional water technology to be difficult to satisfy the water quality standard-required that dispatches from the factory, and greatly reduces the water supply security degree.At present domesticly mainly contain: (1) absorption pre-treatment based on conventional water treatment process improved high luminance relay water source drinking water treatment technology; (2) chemical preoxidation; (3) preferred coagulating agent and flocculation agent; (4) select novel treatment technology: air flotation technology, micro-vortex coagulation low pulse sedimentation, high gradient magnetic separation technique, little flocculation contact percolation technology etc.Above-mentioned technology each treatment unit efficiency under coldcondition all reduces; And the water source drinking water treatment of low temperature high luminance relay has characteristics such as technical process is long, space-time unique is wide, influence factor is many, depends merely on the quality problem that one or more single technologies are difficult to solve cost-effectively numerous complicated.Have only through the system integration and global optimization, could realize that drinking-water quality is up to standard comprehensively.
Since the nineties in 20th century, coagulation-settlement process of new generation---the developed and application of carrier flocculation.According to the definition of U.S. EPA, thereby the carrier flocculation is through using continuous round-robin media particle and various chemical agent to strengthen the materialization treatment process that flco absorption improves suspended substance sedimentation performance in the water.Its principle of work is a dosing coagulant in water at first, and suspended substance and colloidal solid in the water are taken off surely, adds the bigger carrier granule of polymer coagulant aids and density then; Making the impurity particle after taking off surely is wadding nuclear with the carrier, catches effect through bridge formation adsorption and little sand particulate strainer net of macromolecular chain, generates the bigger alumen ustum of density fast; Thereby shorten the settling time greatly; Improve the processing power of settling pond, and successfully manage the HI high impact load, compare with traditional coagulation-settlement process; Carrier flocculation process clarifying speed can improve 3 times, has advantages such as floor space is little, construction costs is low, anti impulsion load.Present generally be magnetic particle, mud or silt particle of carrier; Magnetic flocculation is as a kind of water technology of newline, and remaining needs perfect in some problems: 1. the magnetic architecture of magnetic response device is reasonable inadequately, and magneticstrength is difficult to improve; Often there is leakage field phenomenon in various degree in poor selectivity; 2. magnetic response device ubiquity cost is high, problems such as operation energy consumption height; 3. compare with the magnetic flocculation practical application, the theoretical investigation of magnetic flocculation also is short of very much; 4. magnetic flocculation only is applied in the water treatment in some areas at present, also has certain gap from large-scale application.
In recent years; In the world to based on the carrier flocculation technique; Carrier is that the research and the application of the new and effective settling tank of mud or fine sand caused bigger concern; Wherein,
high-density settling tank (French moral sharp full company),
tube settler (French Velioa group OTV S.A.),
settling tank (OTV S.A. of French Velioa group; In conjunction with fine sand " actively " flocculation and tube settling technology) be the most typical settling tank form that adopts efficient precipitation technology; Because of technology is taken up an area of less, the operation efficient stable, it is new in worldwide water treatment plant, change, expand in the engineering and progressively find application.Foreign scholars flocculation equipment for the patented product carrier equipment, materials more expensive, high investment;
High-density sedimentation tanks,
Sedimentation tank water distribution uniformity;
sedimentation tank sludge volume, difficult to dispose of; water pipelines, pumps and other equipment many and easy to wear and other defects, but also have developed a new type of device, automatic control system, used in conjunction with other processes.Though the domestic application example of modification that the carrier flocculation process is arranged is not able to promote as yet.Liu Yang (2007), Fang Xiaotao (2010) have carried out water treatment plant middle-high density sludge drainage system of settling pond optimization operation research, the simulation of settling region fluidised form and design optimization research.Low turbid micro-polluted water is handled in high-density settling tank and Powdered Activated Carbon, ultra-filtration membrane, the coupling of high speed ultrafiltration pond.The Shanghai Municipal Engineering Design Research Institute from 2007 to domestic water matter characteristics, with various medicaments add, high concentration sludge refluxes, mechanically mixing, the machinery flocculation; Contact flocculation efficiently precipitates, and mud concentrates to wait and organically combines and optimization; Independent research novel middle high-density settling tank; This pond has realized that each one coordinates each other, the efficient function of handling, and overall performance is reached advanced world standards; Possess the ability with the type competition of external pond, in Jiaxing stone mortar ripples water factory's extension project, southern suburbs, Jiaxing water factory first phase of construction, Shengli Oil Field the people live in plenty water factory, use.
At present, carrier is that the new and effective settling tank of mud or fine sand exists a series of problems in operational process: mostly the coagulant aids that adds is PAM, in water treatment, is prone to produce secondary pollution; If carrier is a fine sand, be equipped with special fine sand device, alumen ustum is broken after the sand separation simultaneously, and water ratio is high, is unfavorable for the disposal of mud.And based on the carrier flocculation technique, carrier is that the research of the optimization operation control of new and effective settling tank in the water treatment of low-temperature and low turbidity high luminance relay of mud or fine sand also rarely has report.
In sum, there is the problem that efficient is low, poor processing effect reaches not environmental protection in the treatment process of existing low-temperature and low turbidity high luminance relay water.
Summary of the invention
The objective of the invention is to solve that the processing efficiency that exists in the existing low-temperature and low turbidity high luminance relay water treatment method is low, weak effect, cost is high and the problem of not environmental protection, and a kind of method that adopts modified paligorskite flocculation sorbent treatment low-temperature and low turbidity high luminance relay water is provided.
A kind of method that adopts modified paligorskite flocculation sorbent treatment low-temperature and low turbidity high luminance relay water; Specifically accomplish according to the following steps: at first compound ferro-aluminum, modified paligorskite flocculation sorbent material are added simultaneously to the mixing pit of the high-density settling tank that low-temperature and low turbidity high luminance relay water is housed; Be 2% ~ 5% at return sludge ratio then, pH is 7 ± 0.3, the bottom sludge concentration is that 10000mg/L ~ 20000mg/L, flocculation basin mixing speed are to handle under the condition of 60r/min ~ 80r/min and mud scraper rotating speed 10r/min ~ 20r/min, i.e. low-temperature and low turbidity high luminance relay water after high-density settling tank water outlet obtains handling; The mass ratio of the compound ferro-aluminum of said adding and modified paligorskite flocculation sorbent material is 1: (1 ~ 3); If when humic acid concentration was 5mg/L ~ 10mg/L in the low-temperature and low turbidity high luminance relay water, the dosage of compound ferro-aluminum was 2mg/L; If when humic acid concentration was 10mg/L ~ 25mg/L in the low-temperature and low turbidity high luminance relay water, the dosage of compound ferro-aluminum was 9mg/L.
Advantage of the present invention: one, the present invention is a core with modified paligorskite flocculation sorbent material; Set up " carrier flocculation-efficient deposition " integrated system and handled the method for low-temperature and low turbidity high luminance relay water; Modified paligorskite flocculation sorbent material has been brought into play absorption respectively, helped with fixed attention and has been helped heavy effect as carrier; At first modified paligorskite flocculation sorbent material adsorbs the soil ulmin in the low-temperature and low turbidity high luminance relay water, makes it form comparatively closely knit suspended substance, and is settlement separate through chemical flocculation again; Reach reduction or remove the humus content in the low-temperature and low turbidity high luminance relay water with it, to turbidity, colourity, COD
MnAnd UV
254Clearance be respectively 92.55 ~ 93.62%, 94.05% ~ 97.20%, 60 ~ 62% and 81.52 ~ 82.80%; Delivery turbidity is controlled at below 0.8 ~ 1.0NTU; Colourity is controlled at about 3 ~ 5 degree, and the flco degree of compactness that forms is high, settleability is good, and effluent quality all can reach standard-required.Two, the modified paligorskite flocculation sorbent material of the present invention's employing is environmentally friendly medicament, and cost is low; " carrier flocculation-efficient deposition " integrated system is handled continuously, and efficient is high; Support modification polygorskite flocculation sorbent material throwing amount is few, need not reclaim, and the mud after the processing is prone to dispose, and can make fertilizer, soil improvement agent, substitute energy (burning) etc.
Description of drawings
Fig. 1 is the plat of test one said high-density settling tank, and Fig. 2 is the A-A sectional view of Fig. 1, and Fig. 3 is the B-B sectional view of Fig. 1, and Fig. 4 is the C-C sectional view of Fig. 1.
Embodiment
Embodiment one: this embodiment is a kind of method that adopts modified paligorskite flocculation sorbent treatment low-temperature and low turbidity high luminance relay water, specifically accomplishes according to the following steps:
At first compound ferro-aluminum, modified paligorskite flocculation sorbent material are added simultaneously to the mixing pit of the high-density settling tank that low-temperature and low turbidity high luminance relay water is housed; Be 2% ~ 5% at return sludge ratio then, pH is 7 ± 0.3, the bottom sludge concentration is that 10000mg/L ~ 20000mg/L, flocculation basin mixing speed are to handle under the condition of 60r/min ~ 80r/min and mud scraper rotating speed 10r/min ~ 20r/min, i.e. low-temperature and low turbidity high luminance relay water after high-density settling tank water outlet obtains handling; The mass ratio of the compound ferro-aluminum of said adding and modified paligorskite flocculation sorbent material is 1: (1 ~ 3); If when humic acid concentration was 5mg/L ~ 10mg/L in the low-temperature and low turbidity high luminance relay water, the dosage of compound ferro-aluminum was 2mg/L; If when humic acid concentration was 10mg/L ~ 25mg/L in the low-temperature and low turbidity high luminance relay water, the dosage of compound ferro-aluminum was 9mg/L.。
This embodiment adopts the method for modified paligorskite flocculation sorbent treatment low-temperature and low turbidity high luminance relay water to handle the 12h spoil disposal continuously 1 time.
The modified paligorskite flocculation sorbent material that this embodiment adopts is to be that main body is prepared from polygorskite; The polygorskite that have the title of " kings of thousand soil ", " soil of general-purpose " is a kind of Shuifu County's magnesium silicate clay mineral that contains; Have unique layer chain-like structure and bigger specific surface area; Be natural nano-material, and polygorskite is rich in minerals in China.
Compound ferro-aluminum is a kind of inorganic polymer coagulant, is that main raw material is processed into white lake, ferric sulfate, and its flocculating effect has the reason of three aspects well: the one, because SO
4 2-With the AlO in the aluminum ions hydrolytic polymerization product
4Similar, thus AlO replaced
4, strengthened the charge neutrality ability of clad aluminum ferric flocculant; The 2nd, SO
4 2-Ion is participated in coordination, the molecular weight of compound ferro-aluminum is increased, and make " bridge formation " ability of compound ferro-aluminum be superior to other coagulating agent SO
4 2-Introducing, the flocculation ability of ferro-aluminum flocculation agent is strengthened; The 3rd, the characteristic of molysite has determined that the alumen ustum that in coagulation process, forms is heavier, thereby sedimentation speed is very fast, and aluminium salt formed alumen ustum in the middle of coagulating is bigger simultaneously, and effect has preferably been received in both combinations.Modified paligorskite flocculation sorbent material is as carrier; Mix stages, flocculation stage and subsidence stage in the drinking water enhanced coagulation process in low temperature high luminance relay water source have been participated in; Brought into play absorption respectively, help with fixed attention and helped heavy effect, and the flco degree of compactness that forms is high, settleability is good, the content of remaining aluminium reduces; Body refuse refluxes and has then guaranteed stable, the efficient operation of efficient settling pond, and effluent quality all can reach standard-required.
This embodiment adopts " carrier flocculation-efficient deposition " integrated system; Modified paligorskite flocculation sorbent material has been brought into play absorption respectively, helped with fixed attention and has been helped heavy effect as carrier; At first modified paligorskite flocculation sorbent material adsorbs the soil ulmin in the low-temperature and low turbidity high luminance relay water, makes it form comparatively closely knit suspended substance, and is settlement separate through chemical flocculation again; Reach reduction or remove the humus content in the low-temperature and low turbidity high luminance relay water with it, to turbidity, colourity, COD
MnAnd UV
254Clearance be respectively 92.55 ~ 93.62%, 94.05% ~ 97.20%, 60 ~ 62% and 81.52 ~ 82.80%; Delivery turbidity is controlled at below 0.8～1.0NTU; Colourity is controlled at about 3 ~ 5 degree, and the flco degree of compactness that forms is high, settleability is good, and effluent quality all can reach standard-required.
The modified paligorskite flocculation sorbent material that this embodiment adopts is environmentally friendly medicament, and cost is low; " carrier flocculation-efficient deposition " integrated system is handled continuously, and efficient is high.
Embodiment two: the difference of this embodiment and embodiment one is: be 5% at return sludge ratio, pH is 7, the bottom sludge concentration is that 18000mg/L ~ 20000mg/L, flocculation basin mixing speed are to handle under the condition of 60r/min and mud scraper rotating speed 15r/min; And the dosage of compound ferro-aluminum is 2mg/L, and the dosage of modified paligorskite flocculation sorbent material is 4mg/L.Other are identical with embodiment one.
Embodiment three: this embodiment and embodiment one or one of two difference are: described modified paligorskite flocculation sorbent material is to accomplish according to the following steps: one, purify: at first natural polygorskite and deionized water are by mass ratio 1: (18 ~ 99) are added to natural polygorskite in the deionized water; Low whipping speed is dispersed with stirring 10min ~ 30min under 1000r/min ~ 10000r/min then; Obtain clay slip; Again clay slip is placed whizzer; And be spinning 10min ~ 20min under 4000r/min ~ 12000r/min at centrifugal rotational speed, obtain the pearl clay puddle through spinning, and be to dry to constant weight under 80 ℃ ~ 120 ℃ in temperature; After pulverizing 200 mesh sieves again, promptly obtaining particle diameter is polygorskite behind the purifying below 200 orders; Two, load: be that to be dissolved in volume(tric)fraction be in 2% the glacial acetic acid for 85% ~ 95% chitosan at first with deacetylation; And be that 20 ℃ ~ 100 ℃, mixing speed are to be stirred to dissolving fully under 200r/min ~ 400r/min in temperature; Be that to add particle diameter be polygorskite behind the purifying below 200 orders for 10g/min ~ 50g/min with the speed of adding then; And be that 20 ℃ ~ 100 ℃, mixing speed are to continue to stir 2h ~ 4h under 200r/min ~ 400r/min in temperature; Obtain suspension-s, employing concentration is that the NaOH of 0.5mol/L ~ 1.5mol/L transfers to neutrality with suspension-s, is spinning 10min ~ 20min under 4000r/min ~ 12000r/min at centrifugal rotational speed then; And the solid that spinning is obtained adopts deionized water wash 4 ~ 6 times; Solid after will washing then is 70 ℃ ~ 110 ℃ oven dry 12h ~ 24h in temperature, pulverized 200 mesh sieves again after, promptly obtain modified paligorskite flocculation sorbent material; Deacetylation described in the step 2 is that 85% ~ 95% chitosan mass and volume(tric)fraction are that the ratio of 2% glacial acetic acid volume is 1g: (30mL ~ 120mL); The mass ratio that adds particle diameter described in the step 2 and be polygorskite and deacetylation behind the purifying below 200 orders and be 85% ~ 95% chitosan is (5 ~ 20): 1.Other are identical with embodiment one or two.
Adopt following verification experimental verification effect of the present invention:
Test one: a kind of method that adopts modified paligorskite flocculation sorbent treatment low-temperature and low turbidity high luminance relay water, specifically accomplish according to the following steps:
At first compound ferro-aluminum, modified paligorskite flocculation sorbent material are added simultaneously to the mixing pit of the high-density settling tank that low-temperature and low turbidity high luminance relay water is housed; Be 5% at return sludge ratio then, pH is 7, the bottom sludge concentration is that 18000mg/L ~ 20000mg/L, flocculation basin mixing speed are to handle under the condition of 60r/min and mud scraper rotating speed 15r/min, i.e. low-temperature and low turbidity high luminance relay water after high-density settling tank water outlet obtains handling.
This dosage of testing described compound ferro-aluminum is 2mg/L, and this dosage of testing described modified paligorskite flocculation sorbent material is 4mg/L.
This tests the novel middle high-density settling tank that described high-density settling tank is Shanghai Municipal Engineering Design Research Institute research and development, like Fig. 1 ~ shown in Figure 4; Fig. 1 is the plat of the novel middle high-density settling tank of Shanghai Municipal Engineering Design Research Institute research and development, and Fig. 2 is the A-A sectional view of Fig. 1, and Fig. 3 is the B-B sectional view of Fig. 1, and Fig. 4 is the C-C sectional view of Fig. 1; 1 is the mixing zone among Fig. 1 ~ Fig. 4, and 2 is flocculation zone, and 3 is the swash plate disengaging zone, and 4 is concentrated soil discharging area; 5 is exhalant region, and 6 for turning over mill weir, and 7 is mixing and blending machine, and 8 are the flocculation stirrer; 9 is guide shell, and 10 is water inlet pipe, and 11 is mud return line, and 12 is the mud discharging pipe; 13 is rising pipe, and 14 is intake pump, and 15 is sludge reflux pump, and 16 is water leg.
This tests described modified paligorskite flocculation sorbent material is to accomplish according to the following steps: one, purify: at first natural polygorskite and deionized water are added to natural polygorskite in the deionized water by mass ratio 5:95; Low whipping speed is dispersed with stirring 15min under the 10000r/min then; Obtain clay slip, again clay slip is placed whizzer, and be spinning 10min under the 12000r/min at centrifugal rotational speed; Obtain the pearl clay puddle through spinning; And be to dry to constant weight under 100 ℃ in temperature, pulverized 200 mesh sieves again after, promptly obtaining particle diameter is polygorskite behind the purifying below 200 orders; Two, load: be that to be dissolved in the 150mL volume(tric)fraction be in 2% the glacial acetic acid for 95% chitosan at first with the 2.5g deacetylation; And be that 70 ℃, mixing speed are to stir 4h under the 400r/min in temperature; Then with the speed of adding be 10g/min to add the 25g particle diameter be polygorskite behind the purifying below 200 orders, and be that 70 ℃, mixing speed are to continue stirring 4h 400r/min under in temperature, obtain suspension-s; Employing concentration is that the NaOH of 1.0mol/L transfers to neutrality with suspension-s; Be spinning 10minmin under the 12000r/min at centrifugal rotational speed then, and the solid that spinning obtains adopted deionized water wash 6 times that the solid after will washing then is 80 ℃ of oven dry 18h in temperature; After pulverizing 200 mesh sieves again, promptly obtain modified paligorskite flocculation sorbent material.
This tests turbidity, colourity, COD in the described low-temperature and low turbidity high luminance relay water
MnAnd UV
254MV be respectively 12NTU, 60 degree, 5.10mg/L, 0.202, turbidity, colourity, the COD of the low-temperature and low turbidity high luminance relay water after this test is handled
MnAnd UV
254MV be respectively 0.8NTU, 3 degree, 2mg/L, 0.035, then to turbidity, colourity, COD
MnAnd UV
254Clearance be respectively 93.3%, 95%, 60.7% and 82.7%.Remaining al concn is merely 0.0406mg/L, not only meets China's Drinking Water hygienic quality standard new standard (< 0.2mg/>L, 2006), also is lower than the drinking water standard (< 0.05mgL) of American-European countries.
Claims (3)
1. method that adopts modified paligorskite flocculation sorbent treatment low-temperature and low turbidity high luminance relay water; It is characterized in that adopting the method for modified paligorskite flocculation sorbent treatment low-temperature and low turbidity high luminance relay water to accomplish according to the following steps: at first compound ferro-aluminum, modified paligorskite flocculation sorbent material to be added simultaneously to the mixing pit of the high-density settling tank that low-temperature and low turbidity high luminance relay water is housed; Be 2% ~ 5% at return sludge ratio then, pH is 7 ± 0.3, the bottom sludge concentration is that 10000mg/L ~ 20000mg/L, flocculation basin mixing speed are to handle under the condition of 60r/min ~ 80r/min and mud scraper rotating speed 10r/min ~ 20r/min, i.e. low-temperature and low turbidity high luminance relay water after high-density settling tank water outlet obtains handling; The mass ratio of the compound ferro-aluminum of said adding and modified paligorskite flocculation sorbent material is 1: (1 ~ 3); If when humic acid concentration was 5mg/L ~ 10mg/L in the low-temperature and low turbidity high luminance relay water, the dosage of compound ferro-aluminum was 2mg/L; If when humic acid concentration was 10mg/L ~ 25mg/L in the low-temperature and low turbidity high luminance relay water, the dosage of compound ferro-aluminum was 9mg/L.
2. a kind of method that adopts modified paligorskite flocculation sorbent treatment low-temperature and low turbidity high luminance relay water according to claim 1; It is characterized in that being 5% at return sludge ratio, pH is 7, the bottom sludge concentration is that 18000mg/L ~ 20000mg/L, flocculation basin mixing speed are to handle under the condition of 60r/min and mud scraper rotating speed 15r/min; And the dosage of compound ferro-aluminum is 2mg/L, and the dosage of modified paligorskite flocculation sorbent material is 4mg/L.
3. a kind of method that adopts modified paligorskite flocculation sorbent treatment low-temperature and low turbidity high luminance relay water according to claim 1 and 2; It is characterized in that described modified paligorskite flocculation sorbent material is to accomplish according to the following steps: one, purify: at first natural polygorskite and deionized water are by mass ratio 1: (18 ~ 99) are added to natural polygorskite in the deionized water; Low whipping speed is dispersed with stirring 10min ~ 30min under 1000r/min ~ 10000r/min then; Obtain clay slip, again clay slip is placed whizzer, and be spinning 10min ~ 20min under 4000r/min ~ 12000r/min at centrifugal rotational speed; Obtain the pearl clay puddle through spinning; And be to dry to constant weight under 80 ℃ ~ 120 ℃ in temperature, pulverized 200 mesh sieves again after, promptly obtaining particle diameter is polygorskite behind the purifying below 200 orders; Two, load: be that to be dissolved in volume(tric)fraction be in 2% the glacial acetic acid for 85% ~ 95% chitosan at first with deacetylation; And be that 20 ℃ ~ 100 ℃, mixing speed are to be stirred to dissolving fully under 200r/min ~ 400r/min in temperature; Be that to add particle diameter be polygorskite behind the purifying below 200 orders for 10g/min ~ 50g/min with the speed of adding then; And be that 20 ℃ ~ 100 ℃, mixing speed are to continue to stir 2h ~ 4h under 200r/min ~ 400r/min in temperature; Obtain suspension-s, employing concentration is that the NaOH of 0.5mol/L ~ 1.5mol/L transfers to neutrality with suspension-s, is spinning 10min ~ 20min under 4000r/min ~ 12000r/min at centrifugal rotational speed then; And the solid that spinning is obtained adopts deionized water wash 4 ~ 6 times; Solid after will washing then is 70 ℃ ~ 110 ℃ oven dry 12h ~ 24h in temperature, pulverized 200 mesh sieves again after, promptly obtain modified paligorskite flocculation sorbent material; Deacetylation described in the step 2 is that 85% ~ 95% chitosan mass and volume(tric)fraction are that the ratio of 2% glacial acetic acid volume is 1g: (30mL ~ 120mL); The mass ratio that adds particle diameter described in the step 2 and be polygorskite and deacetylation behind the purifying below 200 orders and be 85% ~ 95% chitosan is (5 ~ 20): 1.
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| CN108298731A (en) * | 2018-03-22 | 2018-07-20 | 沈阳建筑大学 | A kind of deeply removing arsenic system and device and its dearsenicating method |
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