CN113121720A - Modified chitin and application thereof in enrichment of artificial radionuclide - Google Patents
Modified chitin and application thereof in enrichment of artificial radionuclide Download PDFInfo
- Publication number
- CN113121720A CN113121720A CN201911398976.8A CN201911398976A CN113121720A CN 113121720 A CN113121720 A CN 113121720A CN 201911398976 A CN201911398976 A CN 201911398976A CN 113121720 A CN113121720 A CN 113121720A
- Authority
- CN
- China
- Prior art keywords
- chitin
- modified chitin
- adsorption
- modified
- artificial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920002101 Chitin Polymers 0.000 title claims abstract description 72
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 16
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 150000001875 compounds Chemical class 0.000 claims abstract description 8
- 239000011574 phosphorus Substances 0.000 claims abstract description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 8
- 239000003607 modifier Substances 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 239000013535 sea water Substances 0.000 claims description 24
- 238000000498 ball milling Methods 0.000 claims description 21
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 19
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 13
- 239000002904 solvent Substances 0.000 claims description 9
- 239000011701 zinc Substances 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 8
- 239000013505 freshwater Substances 0.000 claims description 8
- 229940098779 methanesulfonic acid Drugs 0.000 claims description 8
- 238000003760 magnetic stirring Methods 0.000 claims description 7
- 229910052684 Cerium Inorganic materials 0.000 claims description 6
- 229910052726 zirconium Inorganic materials 0.000 claims description 6
- YWEUIGNSBFLMFL-UHFFFAOYSA-N diphosphonate Chemical compound O=P(=O)OP(=O)=O YWEUIGNSBFLMFL-UHFFFAOYSA-N 0.000 claims description 5
- 238000004108 freeze drying Methods 0.000 claims description 5
- DLYUQMMRRRQYAE-UHFFFAOYSA-N phosphorus pentoxide Inorganic materials O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052788 barium Inorganic materials 0.000 claims description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052712 strontium Inorganic materials 0.000 claims description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 abstract description 67
- 238000012544 monitoring process Methods 0.000 abstract description 9
- 230000026731 phosphorylation Effects 0.000 abstract description 6
- 238000006366 phosphorylation reaction Methods 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 24
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 12
- 235000017557 sodium bicarbonate Nutrition 0.000 description 12
- 239000011780 sodium chloride Substances 0.000 description 12
- 239000008367 deionised water Substances 0.000 description 8
- 229910021641 deionized water Inorganic materials 0.000 description 8
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000009616 inductively coupled plasma Methods 0.000 description 7
- 230000002285 radioactive effect Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- -1 iron ions Chemical class 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052705 radium Inorganic materials 0.000 description 1
- HCWPIIXVSYCSAN-UHFFFAOYSA-N radium atom Chemical compound [Ra] HCWPIIXVSYCSAN-UHFFFAOYSA-N 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
- C08B37/0024—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid beta-D-Glucans; (beta-1,3)-D-Glucans, e.g. paramylon, coriolan, sclerotan, pachyman, callose, scleroglucan, schizophyllan, laminaran, lentinan or curdlan; (beta-1,6)-D-Glucans, e.g. pustulan; (beta-1,4)-D-Glucans; (beta-1,3)(beta-1,4)-D-Glucans, e.g. lichenan; Derivatives thereof
- C08B37/0027—2-Acetamido-2-deoxy-beta-glucans; Derivatives thereof
- C08B37/003—Chitin, i.e. 2-acetamido-2-deoxy-(beta-1,4)-D-glucan or N-acetyl-beta-1,4-D-glucosamine; Chitosan, i.e. deacetylated product of chitin or (beta-1,4)-D-glucosamine; Derivatives thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
- B01J20/28019—Spherical, ellipsoidal or cylindrical
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/73—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using plasma burners or torches
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/006—Radioactive compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Pathology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Immunology (AREA)
- General Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Plasma & Fusion (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Materials Engineering (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention belongs to the field of artificial radionuclide enrichment, and particularly relates to modified chitin and application thereof in artificial radionuclide enrichment. The modified chitin is prepared by taking chitin as a raw material and a phosphorus-containing compound as a modifier through a mechanochemical method. The phosphorylation modified chitin adsorption material has low material preparation cost and simple and convenient preparation method, can quickly enrich various artificial radionuclides in the complex environment of the ocean, has high adsorption speed, greatly reduces time cost, and can be further applied to routine monitoring of nuclide pollution in offshore areas or emergency monitoring after nuclear accidents occur.
Description
Technical Field
The invention belongs to the field of artificial radionuclide enrichment, and particularly relates to modified chitin and application thereof in artificial radionuclide enrichment.
Background
At this stage, nuclear energy industry is rapidly developed, and potential nuclear accidents increasingly increase the nuclear pollution pressure in offshore areas. The water in the sea is huge, the diffusion of the artificial radioactive nuclide is fast, the concentration of the artificial radioactive nuclide is relatively low, and the monitoring of the pollution of the artificial radioactive nuclide is difficult in sudden nuclear accidents. At present, the detection method of the radionuclide in the water body mainly comprises underwater in-situ gamma energy spectrum measurement, conventional marine sampling, laboratory analysis and on-site enrichment detection. The underwater in-situ gamma energy spectrum measuring method has higher detection limit, and cannot realize the rapid detection and long-term monitoring of low-concentration radioactive nuclide. The conventional offshore sampling and laboratory analysis method needs to collect a large amount of seawater samples, is complicated in process, long in time consumption and not suitable for emergency occasions. On-site rapid enrichment detection is considered to be an effective approach for radionuclide detection in the ocean. In the prior art, radium nuclide can realize rapid enrichment, and rapid enrichment and monitoring of other nuclides are still difficult, particularly, researches on artificial radionuclides such as zirconium and cerium are few. There are two major difficulties with artificial radionuclide monitoring in the ocean: firstly, in seawater, nuclides are difficult to enrich. Secondly, the enrichment time is too long, which requires about three to four days, and the requirement of rapid monitoring is difficult to meet when the nuclear leakage accident really occurs.
Disclosure of Invention
Aiming at the problems of great difficulty and long enrichment time of nuclide in the prior art, the invention provides modified chitin, and the material has the advantages of simple preparation method, high enrichment speed of artificial radionuclide and high enrichment efficiency.
The modified chitin is prepared by the method comprising the following steps: the chitin is used as a raw material and is prepared by a mechanochemical method, wherein the mechanochemical method is ball milling.
Preferably, the phosphorus-containing compound is phosphorus pentoxide.
Preferably, during the ball milling process, methane sulfonic acid is used as a catalyst, and N, N-dimethylformamide or N, N-dimethylacetamide is used as a solvent.
Preferably, the mass ratio of the chitin to the phosphorus-containing compound is 1: 0.5 to 4.
Preferably, the mass volume ratio of the chitin to the solvent is 1:5 to 50.
Preferably, the mass volume ratio of the chitin to the catalyst is 1-10: 1.
further preferably, the mass ratio of the chitin to the phosphorus-containing compound is 1: 2-3.
Preferably, the ball milling time is 4-48 h, and the rotation speed of the ball mill is 100-540 rpm;
further preferably, the ball milling time is 30-48 h.
As a preferred operation mode, the modified chitin is prepared by the following method:
mixing chitin, a catalyst, a solvent and a modifier and then carrying out ball milling by taking methane sulfonic acid as the catalyst, N-dimethylformamide or N, N-dimethylacetamide as the solvent and phosphorus pentoxide as the modifier;
in the ball milling process, the mass ratio of the chitin to the phosphorus-containing compound is 1: 2-3; the mass volume ratio of the chitin to the solvent is 1: 5-50; the weight volume ratio of the chitin to the methane sulfonic acid is 1-10:1, and the rotating speed of the ball mill is 100-540 rpm; the ball milling time is 30-48 h.
Preferably, the operation of washing and drying the product after the ball milling is finished is also included;
further preferably, the drying is performed by freeze-drying. The research shows that the performance of the material obtained by the freeze drying mode is better than that of the material obtained by vacuum drying.
The invention also aims to protect the application of the modified chitin in enriching the artificial radionuclide.
Preferably, the artificial radionuclide is an artificial radionuclide in seawater or freshwater. The modified chitin of the invention can perform ideal enrichment on artificial radionuclide in both seawater and fresh water.
Preferably, the artificial radionuclide is one or more of zirconium, cerium, iron, zinc, nickel, strontium, magnesium, barium or calcium. Wherein, the method has outstanding effect on the enrichment of cerium and zirconium.
Preferably, seawater or fresh water containing a plurality of artificial radionuclides is enriched. Under the condition of coexisting ions, the modified chitin still has higher adsorption selectivity on each ion, and further shows that the modified chitin can be used for enriching artificial radionuclides in the ocean.
Preferably, when the artificial radionuclide in the seawater or the fresh water is enriched, the concentration of the artificial radionuclide is 1-100 ppm, and the dosage of the modified chitin material is 0.5-4.0 g/L.
Preferably, during the enrichment of the artificial radionuclide, the solution to be enriched is magnetically stirred.
More preferably, the stirring time is 1min to 1 h.
As a preferred mode of operation, with respect to Ce4+The water body with the concentration of 10-15 ppm, and the addition amount of the modified chitin is 1.5-2.0/L.
Further preferably, the enrichment is performed for 30min under magnetic stirring.
As a preferred mode of operation, for Zr4+Water with the concentration of 10-15 ppm, and the addition amount of the modified chitin is 3.0-4.0 g/L;
more preferably, the enrichment is carried out for 30min to 1h under the condition of magnetic stirring.
As a preferred mode of operation, with respect to Zn2+Has a concentration of 10 to 15ppm, Fe3+In a concentration of 10 to 15ppm, Zr4+Is 10 to 15ppm, Ce4+Is rich inWater with the degree of 10-15 ppm, and the addition amount of the modified chitin is 2.0-4.0 g/L.
More preferably, the enrichment is carried out for 30min to 1h under the condition of magnetic stirring.
The invention has the following beneficial effects:
1) the invention carries out chemical modification on chitin with wide sources and low price, prepares a modified chitin adsorbent, and can quickly realize the quick enrichment of artificial radionuclides in seawater.
2) The phosphorylation modified chitin adsorption material has low material preparation cost and simple and convenient method, can quickly enrich various artificial radionuclides in the complex environment of the ocean, has high adsorption speed, greatly reduces time cost, and can be further applied to routine monitoring of nuclide pollution in offshore areas or emergency monitoring of nuclear accidents.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1
The embodiment relates to modified chitin, which is prepared by the following method:
1) adding chitin and phosphorus pentoxide into a ball milling tank according to a mass ratio of 1:2, adding a catalyst methanesulfonic acid, and adding a solvent N, N-dimethylformamide into the ball milling tank, wherein the weight-volume ratio of the chitin to the methanesulfonic acid is 3:1(g/ml), the weight-volume ratio of the chitin to the N, N-dimethylformamide is 1:20(g/ml), the ball milling time is set to be 48h, and the rotating speed of a ball mill is 540 rpm;
2) and after the ball milling is finished, washing the product to be neutral by using deionized water, and freeze-drying to obtain the modified chitin material.
Example 2
The embodiment relates to modified chitin, which is prepared by the following method:
1) adding chitin and phosphorus pentoxide into a ball milling tank according to the mass ratio of 1:3, adding a catalyst methanesulfonic acid, and adding N, N-dimethylformamide into the ball milling tank, wherein the weight-volume ratio of the chitin to the methanesulfonic acid is 3:1(g/ml), the weight-volume ratio of the chitin to the N, N-dimethylformamide is 1:20(g/ml), the ball milling time is set to be 48h, and the rotating speed of a ball mill is 540 rpm;
2) and after the ball milling is finished, washing the product to be neutral by using deionized water, and freeze-drying to obtain the modified chitin material.
Example 3
The experimental example relates to the adsorption removal of Ce from modified chitin described in example 14+The application comprises the following specific operations:
1) preparing simulated seawater: dissolving 25.6g of sodium chloride and 198mg of sodium bicarbonate in 1L of deionized water, and stirring until the sodium chloride and the sodium bicarbonate are completely dissolved to obtain simulated seawater with the pH value of about 8.1;
2) simulated seawater is used as a solvent, and 100mL of Ce-containing solution is prepared4+The solution (2) is divided into two parts, each part is 50mL, 100mg of the chitin adsorption material modified in the embodiment 1 is added, magnetic stirring is carried out for 30min and 1h respectively, after the reaction is finished, a filter membrane of 0.22um is used for filtering, and the concentration of the solution before and after adsorption is measured by using an inductively coupled plasma emission spectrometer.
Stirring for 30min, Ce4+The concentration of Ce is reduced from 9.96ppm before adsorption to 0.23ppm after adsorption, the mixture is stirred for 1 hour, and the Ce is4+The concentration of (B) was reduced from 9.96ppm before adsorption to 0.16ppm after adsorption.
Example 4
The experimental example relates to the adsorption removal of Zr by modified chitin described in example 14+The application comprises the following specific operations:
1) preparing simulated seawater: dissolving 25.6g of sodium chloride and 198mg of sodium bicarbonate in 1L of deionized water, and stirring until the sodium chloride and the sodium bicarbonate are completely dissolved to obtain simulated seawater with the pH value of about 8.1;
2) 3 portions of 50mL of Zr-containing solution were prepared4+The solution of (1), wherein the addition amount of the modified chitin is 100mg, 150mg and 200mg respectively, magnetic stirring is carried out for 1h, after the reaction is finished, a sample is filtered by a filter membrane of 0.22um, and the concentration of the solution before and after adsorption is measured by using an inductively coupled plasma emission spectrometer.
Adding 100mg phosphoric acidModified chitin-adsorbing material, Zr4+The concentration of (B) was reduced from 11.74ppm before adsorption to 3.8ppm after adsorption.
Adding 150mg of phosphorylation modified chitin adsorption material, Zr4+The concentration of (B) was reduced from 10.91ppm before adsorption to 1.35ppm after adsorption.
Adding 200mg of phosphorylation modified chitin adsorption material, Zr4+The concentration of (B) was reduced from 10.91ppm before adsorption to 0.68ppm after adsorption.
Example 5
The experimental example relates to the removal of Fe by adsorption of modified chitin described in example 13+The application comprises the following specific operations:
1) preparing simulated seawater: dissolving 25.6g of sodium chloride and 198mg of sodium bicarbonate in 1L of deionized water, and stirring until the sodium chloride and the sodium bicarbonate are completely dissolved to obtain simulated seawater with the pH value of about 8.1;
2) 2 portions of 50mL Fe3+The solution of (1), wherein the addition of modified chitin is 50mg and 100mg respectively, magnetic stirring is carried out for 1h, after the reaction is finished, a sample is filtered by a filter membrane of 0.22um, and the concentration of the solution before and after adsorption is measured by using an inductively coupled plasma emission spectrometer.
Adding 50mg of phosphorylation modified chitin adsorption material and Fe3+The concentration of (B) was reduced from 11.53ppm before adsorption to 8.06ppm after adsorption.
Adding 100mg of phosphorylation modified chitin adsorption material and Fe3+The concentration of (B) was reduced from 11.53ppm before adsorption to 6.15ppm after adsorption.
Example 6
The experimental example relates to the Zn removal by adsorption of the modified chitin described in the embodiment 12+The application comprises the following specific operations:
1) preparing simulated seawater: dissolving 25.6g of sodium chloride and 198mg of sodium bicarbonate in 1L of deionized water, and stirring until the sodium chloride and the sodium bicarbonate are completely dissolved to obtain simulated seawater with the pH value of about 8.1;
2) 2 portions of 100mL of Zn-containing solution were prepared2+The solution of (1), wherein the addition amount of the modified chitin is 100mg, one part is magnetically stirred for 1h, the other part is magnetically stirred for 30min, and the reaction is finishedThe sample was filtered through a 0.22um filter and the concentration of the solution before and after adsorption was measured using an inductively coupled plasma emission spectrometer.
Magnetically stirring for 30min, Zn2+The concentration of (B) was reduced from 11.71ppm before adsorption to 6.93ppm after adsorption.
Magnetically stirring for 1h, Zn2+The concentration of (B) was reduced from 11.71ppm before adsorption to 6.75ppm after adsorption.
Example 7
The embodiment relates to the treatment of the modified chitin to the seawater containing various artificial radioactive elements in the embodiment 2, which comprises the following steps:
1) preparing simulated seawater: dissolving 25.6g of sodium chloride and 198mg of sodium bicarbonate in 1L of deionized water, and stirring until the sodium chloride and the sodium bicarbonate are completely dissolved to obtain simulated seawater with the pH value of about 8.1;
2) 50mL of a Zn-containing solution was prepared2+、Fe3+、Zr4+And Ce4+The solution of (1) is added with 100mg of the modified chitin adsorption material described in the embodiment 2, the mixture is magnetically stirred for 1 hour, after the reaction is finished, a sample is filtered by a filter membrane of 0.22um, and the concentration of the solution before and after the adsorption is measured by using an inductively coupled plasma emission spectrometer.
Zn2+From 11.9ppm before adsorption to 6.31ppm after adsorption, Fe3+From 11.37ppm before adsorption to 5.37ppm, Zr after adsorption4+From 10.91ppm before adsorption to 0.68ppm, Ce after adsorption4+The concentration of (B) was reduced from 13.19ppm before adsorption to 0.02ppm after adsorption.
Example 8
The embodiment relates to the treatment of fresh water containing various artificial radioactive elements by modified chitin in the embodiment 2, which comprises the following steps:
50mL of Zn-containing solution was prepared with water2+、Fe3+、Zr4+And Ce4+Adding 100mg of chitin adsorbing material described in embodiment 2, magnetically stirring for 1h, filtering the sample with 0.22um filter membrane after reaction, and measuring the concentration of the solution before and after adsorption by using an inductively coupled plasma emission spectrometerAnd (4) determining.
Zn2+From 14.95ppm before adsorption to 1.39ppm after adsorption, Fe3+From 14.17ppm before adsorption to 1.15ppm, Zr after adsorption4+From 14.66ppm before adsorption to 0.93ppm, Ce after adsorption4+The concentration of (B) was reduced from 15.14ppm before adsorption to 0.2ppm after adsorption.
Comparative example 1
The embodiment relates to the treatment of fresh water containing various artificial radioactive elements by unmodified chitin, which comprises the following steps:
1) preparing simulated seawater: dissolving 25.6g of sodium chloride and 198mg of sodium bicarbonate in 1L of deionized water, and stirring until the sodium chloride and the sodium bicarbonate are completely dissolved to obtain simulated seawater with the pH value of about 8.1;
2) 50mL of a Zn-containing solution was prepared2+、Fe3+、Zr4+And Ce4+Adding 100mg of unmodified chitin into the solution, magnetically stirring for 1h, filtering a sample by using a 0.22um filter membrane after the reaction is finished, and measuring the concentration of the solution before and after adsorption by using an inductively coupled plasma emission spectrometer.
Zn before adsorption2+Has a concentration of 15.39ppm and Zn is adsorbed2+Is 15.36 ppm; the concentration of zinc ions before and after adsorption is not changed; fe before adsorption3+Has a concentration of 14.19ppm and Fe after adsorption3+The concentration of (A) is 14.18ppm, the concentration of iron ions before and after adsorption is not changed, and Ce before adsorption4+Has a concentration of 12.19ppm and is Ce after adsorption4+Is 12.14 ppm; the concentration of cerium ions before and after adsorption is not changed; zr before adsorption4+Has a concentration of 10.19ppm, Zr after adsorption4+The concentration of (3) was 10.2ppm, and the concentration of zirconium ions before and after adsorption was not changed.
The above shows that the chitin has no enrichment effect on zinc ions, iron ions, cerium ions and zirconium ions in the simulated seawater.
Although the invention has been described in detail hereinabove by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that many modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The modified chitin is characterized in that the modified chitin is prepared by taking chitin as a raw material and a phosphorus-containing compound as a modifier through a mechanochemical method, wherein the mechanochemical method is ball milling.
2. The modified chitin according to claim 1, wherein the phosphorus-containing compound is phosphorus pentoxide.
3. The modified chitin according to claim 1 or 2, wherein in the ball milling process, methanesulfonic acid is used as a catalyst, and N, N-dimethylformamide or N, N-dimethylacetamide is used as a solvent.
4. The modified chitin according to any one of claims 1 to 3, wherein the mass ratio of the chitin to the phosphorus-containing compound is 1: 0.5 to 4; preferably 1:2 to 3
And/or, preferably, the mass volume ratio of the chitin to the solvent is 1: 5-50;
and/or, preferably, the mass volume ratio of the chitin to the catalyst is (1-10): 1.
5. the modified chitin according to any one of claims 1 to 4, wherein the time for ball milling is 4 to 48 hours, and the rotation speed of a ball mill is 100 to 540 rpm;
the ball milling time is preferably 30-48 h.
6. The modified chitin according to any one of claims 1 to 5, further comprising washing and drying the product after the ball milling; preferably, the drying is performed by freeze-drying.
7. Use of the modified chitin as claimed in any one of claims 1-6 for enriching artificial radionuclide.
8. The use according to claim 7, wherein the artificial radionuclide is an artificial radionuclide in seawater or freshwater;
preferably, the artificial radionuclide is one or more of zirconium, cerium, iron, zinc, nickel, strontium, magnesium, barium or calcium.
9. The use according to claim 7 or 8, wherein the concentration of the artificial radionuclide is 1 to 100ppm and the amount of the modified chitin material is 0.5 to-4.0 g/L when enriching the artificial radionuclide in seawater or fresh water.
10. Use according to claim 8 or 9, characterized in that during the enrichment of the artificial radionuclide, the solution to be enriched is subjected to magnetic stirring; preferably, the stirring time is 1min to 1 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911398976.8A CN113121720A (en) | 2019-12-30 | 2019-12-30 | Modified chitin and application thereof in enrichment of artificial radionuclide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911398976.8A CN113121720A (en) | 2019-12-30 | 2019-12-30 | Modified chitin and application thereof in enrichment of artificial radionuclide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113121720A true CN113121720A (en) | 2021-07-16 |
Family
ID=76768972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911398976.8A Pending CN113121720A (en) | 2019-12-30 | 2019-12-30 | Modified chitin and application thereof in enrichment of artificial radionuclide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113121720A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109225155A (en) * | 2018-10-26 | 2019-01-18 | 浙江海洋大学 | A kind of preparation method of the superior adsorbent for cerium ion recycling |
| CN110124641A (en) * | 2019-04-29 | 2019-08-16 | 华中科技大学 | A kind of radionuclide adsorbent material and its preparation method and application |
-
2019
- 2019-12-30 CN CN201911398976.8A patent/CN113121720A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109225155A (en) * | 2018-10-26 | 2019-01-18 | 浙江海洋大学 | A kind of preparation method of the superior adsorbent for cerium ion recycling |
| CN110124641A (en) * | 2019-04-29 | 2019-08-16 | 华中科技大学 | A kind of radionuclide adsorbent material and its preparation method and application |
Non-Patent Citations (2)
| Title |
|---|
| 兰云军: "《皮革化学品的制备--理论与实践》", 31 January 2001 * |
| 娄春华等: "《高分子科学导论》", 31 March 2019 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108160048B (en) | Large-scale preparation method of high-stability cesium removal adsorbent, and product and application thereof | |
| CN107262073B (en) | A kind of cadmium sorption agent and its preparation method and application | |
| CN109174060B (en) | Phosphonic acid group-containing chelate resin and method for separating and enriching thorium under high acidity | |
| CN112742343A (en) | Copper nickel ferrocyanide/montmorillonite composite material, preparation method and adsorption application thereof | |
| CN109364770B (en) | Preparation method and application of gadolinium ion imprinting nano carbon material composite membrane | |
| CN113121720A (en) | Modified chitin and application thereof in enrichment of artificial radionuclide | |
| CN114405456A (en) | Gamma-Fe for uranium removal2O3Preparation method of @ HAP magnetic composite material | |
| CN117603464A (en) | Copper (II) -calixarene complex monocrystal, and preparation method and application thereof | |
| CN113929905A (en) | Preparation method and application of imine bond-connected fluorescent covalent organic framework | |
| CN112592483A (en) | Preparation and application of water system ZIF-8, EY/ZIF-8/PAA composite aerogel | |
| CN110727023B (en) | Application of modified cellulose material in enrichment of artificial radionuclide | |
| CN114956172B (en) | Magnesium vanadate adsorbent for targeting strontium ions and cesium ions, and preparation method and application thereof | |
| Ishida et al. | A new method for phosphate purification for oxygen isotope ratio analysis in freshwater and soil extracts using solid‐phase extraction with zirconium‐loaded resin | |
| CN110727022B (en) | Application of 4A molecular sieve in rapid enrichment of artificial radionuclide zirconium in ocean | |
| CN115350731A (en) | Application of macroporous N-methylimidazolyl strongly-basic anion exchange resin as pertechnetate adsorbent | |
| CN108428486A (en) | A kind of cesium ion minimizing technology based on bentonite chitosan compound microsphere | |
| CN116539773B (en) | Method for detecting fractionation coefficient of calcium isotope in adsorption process | |
| KR20210116302A (en) | Salt Capable Of Selectively Hydrated With Tritium Water, Adsorbent That Binds To The Hydrate And Method For Removing Tritium Water Using The Same | |
| Zhang et al. | Adsorption of Th and Pa onto particles and the effect of organic compounds in natural seawater | |
| CN118162114B (en) | Magnetic hydrogen bond organic framework material for adsorbing lead and copper as well as preparation method and application thereof | |
| RU2345431C2 (en) | Sorption material locating molecular radioiodine from aqueous npp coolant based on ion-exchange resins | |
| Abe et al. | Simple and convenient preconcentration procedure for the isotopic analysis of uranium in seawater | |
| NL2032807B1 (en) | Ceramic/sodium titanosilicate composite treatment agent for cesium ion adsorption and solidification at room temperature | |
| CN116026913B (en) | Method for carrying out U-Th (Th) dating on fourth-period burkeite sample based on magnesium hydroxide coprecipitation | |
| CN114906858B (en) | Modified low-silicon CHA molecular sieve and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210716 |