CN209934476U

CN209934476U - Electrodialysis ion exchange device for geological sample pretreatment

Info

Publication number: CN209934476U
Application number: CN201920435992.9U
Authority: CN
Inventors: 吴述超; 董利明; 郑存江; 孙朝阳
Original assignee: ZHEJIANG INSTITUTE OF GEOLOGY AND MINERAL RESOURCE
Current assignee: ZHEJIANG INSTITUTE OF GEOLOGY AND MINERAL RESOURCE
Priority date: 2019-04-02
Filing date: 2019-04-02
Publication date: 2020-01-14
Anticipated expiration: 2029-04-02

Abstract

The utility model discloses an electrodialysis ion exchange device for geological sample pretreatment, device include ion exchange chamber, anode chamber and positive pole, cathode chamber and negative pole and power, are equipped with strong alkali type anion exchange membrane between anode chamber and the ion exchange chamber, are equipped with strong alkali type anion exchange membrane between cathode chamber and the ion exchange chamber, and cathode chamber entry and cathode chamber export have been seted up to the cathode chamber, and anode chamber entry and anode chamber export have been seted up to the anode chamber. The utility model discloses for traditional dilution, the method of long-time heating removal acid radical ion, a preceding processing apparatus adopts the ion exchange electrodialysis method, the utility model discloses only eliminate or reduce acid radical ion concentration in the sample, to the target ion that wants the test influence-free, avoided the shortcoming of dilution method, for the method of long-time heating removal acid radical ion, the utility model discloses an electrodialysis ion exchange device has simple structure, and the equipment is convenient, but advantages such as continuous operation.

Description

Electrodialysis ion exchange device for geological sample pretreatment

Technical Field

The utility model relates to an ion exchange device, specifically speaking are electrodialysis ion exchange device for geological sample pretreatment.

Background

Hydrochloric acid (HCl) and nitric acid (HNO) are generally adopted in the geological sample pretreatment process₃) Hydrofluoric acid (HF), perchloric acid (HClO)₄) The mixed acid dissolves the sample. The mixed acid has strong acidity, and a large amount of acid radicals (F) exist when the acid substances with high concentration are injected into a geological sample by ICP-MS^-，Cl^-，ClO₄ ^-，NO₃ ^-) It will cause matrix interference to ICP-MS. Therefore, these acid ions need to be removed before the sample is injected, or reduced to a certain concentration so as not to generate matrix interference. An effective method is to change HF, HCl and the like from liquid to gas by heating to volatilize, which usually takes more than 12 hours and is time-consuming and labor-consuming. Yet another method is a dilution method, in which the concentration of the acid ion is reduced by diluting the sample. However, this method causes the concentration of trace ions in the sample to be lowered, and even below the detection limit of ICP-MS, it is difficult to achieve accurate measurement. Therefore, a suitable technology is found to quickly and effectively reduce or remove various acid radical ions, which has important significance for eliminating ICP-MS matrix interference and improving analysis and test efficiency, and is a priority for geological industry analysis tasks. Applicants review the vast literature and no reports of improvements to the methods and related patents are available.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a it has strong alkaline anion exchange resin's electrodialysis ion exchange device to fill as a sample pretreatment device, allies oneself with inductive coupling plasma mass spectrograph (ICP-MS) and uses, reduces acid radical ion concentration, eliminates the mass spectrum base member interference effect of high-content acidic medium metal ion survey in to geological sample, improves detection method's sensitivity and accuracy.

The utility model discloses a realize through following technical scheme:

the utility model discloses an electrodialysis ion exchange device, the device include ion exchange chamber, anode chamber and positive pole, cathode chamber and negative pole and power, be equipped with strong alkali type anion exchange membrane between anode chamber and the ion exchange chamber, be equipped with strong alkali type anion exchange membrane between cathode chamber and the ion exchange chamber, cathode chamber entry and cathode chamber export have been seted up to the cathode chamber, anode chamber entry and anode chamber export have been seted up to the anode chamber.

As a further improvement, the ion exchange chamber of the utility model is provided with an exchange chamber inlet and an exchange chamber outlet.

As a further improvement, the ion exchange chamber is filled with strong alkali type anion exchange resin.

As a further improvement, the anode chamber and the cathode chamber of the utility model are trough-shaped electrode chambers, and the size of the anode and the size of the cathode are the same as that of the electrode chambers.

As a further improvement, the anode and the cathode of the utility model are made of titanium-based platinized porous metal materials.

As a further improvement, the aperture of the utility model is 50 μm.

As a further improvement, the cathode and the anode of the utility model are connected with a power supply through a metal lead.

As a further improvement, the utility model discloses the check out test set of analysis test sample is inductively coupled plasma mass spectrograph.

The beneficial effects of the utility model reside in that: compared with the traditional method for removing acid radical ions by dilution and long-time heating, the utility model designs a pretreatment device, which adopts the ion exchange electrodialysis method to electrolyze pure water to generate OH^-Neutralizing H of the sample⁺And exchange with acid radical ion to reduce the acidity of the sample and eliminate the interference of ICP-MS matrix. The utility model only eliminates or reduces the concentration of acid radical ions in the sample, has no influence on the target ions to be tested, and avoids the defects of the dilution method. Compared with the method for removing acid radical ions by heating for a long time, the electrodialysis ion exchange device has the advantages of simple structure, convenient assembly, continuous work and the like.

Electrodialysis ion exchange device be equipped with exchange chamber, anode chamber and positive pole, cathode chamber and negative pole and power, all accompany strong alkali type anion exchange membrane between exchange chamber and anode chamber, exchange chamber and the cathode chamber, positive pole and negative pole are connected with the power, the cathode chamber is equipped with cathode chamber entry and cathode chamber export, the anode chamber is equipped with anode chamber entry and anode chamber export, the exchange chamber is equipped with the import of exchange chamber and the export of exchange chamber.

The anode chamber and the cathode chamber can be designed into a tank-shaped electrode chamber according to the shapes of the cathode and the anode, the length and width of the anode and the cathode are the same as those of the electrode chamber, the anode and the cathode are titanium-based platinized porous electrodes, and the aperture is about 50 mu m.

Drawings

FIG. 1 is a schematic structural diagram of an electrodialysis ion exchange device of the present invention;

FIG. 2 is a schematic view of the working principle and the working flow of the present invention;

labeled in fig. 1:

1-an ion exchange chamber; 2-an anode chamber; 3-a cathode chamber; 4, 4' -anion exchange membranes; 5-anion exchange resin; 6-a cathode; 7-an anode; 8-a wire; 9-a power supply; 10-exchange chamber inlet; 11-the exchange chamber outlet; 12-anode chamber inlet; 13-cathode chamber inlet; 14-cathode chamber outlet; 15-anode chamber outlet.

Detailed Description

The drawings provided by the present invention are further described below:

an electrodialysis ion exchange device filled with strong base type anion exchange resin is designed. The ion exchange membrane consists of an ion exchange chamber 1, an anode chamber 2 and a cathode chamber 3, wherein strong alkali type anion exchange membranes 4 and 4' are respectively clamped between the ion exchange chamber 1 and the anode chamber 2 as well as between the ion exchange chamber 3 and the cathode chamber 2. The ion exchange chamber 1 is filled with strong base type anion exchange resin 5. The anode chamber 2 and the cathode chamber 3 are both micro-tanks, and titanium-based platinized porous electrodes are arranged in the micro-tanks as a cathode 6 and an anode 7.

Fig. 1 is a structural diagram of an electrodialysis ion exchange apparatus: the device is composed of an ion exchange chamber 1, an anode chamber 2 and a cathode chamber 3. Strong base type anion exchange resin 5 is filled in the ion exchange chamber 1, a strong base type anion exchange membrane 4 is clamped between the ion exchange chamber 1 and the cathode chamber 3, and a strong base type anion exchange membrane 4' is clamped between the ion exchange chamber 1 and the anode chamber 2. The exchange chamber is provided with an exchange chamber inlet 10 and an exchange chamber outlet 11. The anode chamber 2 is provided with an anode chamber inlet 12 and an anode chamber outlet 15, and the cathode chamber 3 is provided with a cathode chamber inlet 13 and a cathode chamber outlet 14. The anode chamber 2 and the cathode chamber 3 are both micro-tanks, and titanium-based platinized porous electrodes are embedded as a cathode 6 and an anode 7. The cathode 6 and the anode 7 are connected to a power supply 9 via metal wires 8. The power supply special for the cathode and the anode supplies power, and the voltage range is 0-15.5V.

Fig. 2 is the working principle and the working flow schematic diagram of the utility model:

the sample containing high concentration mixed acid enters the ion exchange chamber 1 from the inlet 10 of the ion exchange chamber, and acid radical ions (X is used as X)^-Represents) is retained on the strong base anion exchange resin 5 in the ion exchange chamber 1 by ion exchange with the exchange groups on the resin:

R-OH+HX＝R-X+H₂O

in the above reaction formula, R is a fixed group in the strongly basic anion exchange resin 5. After the ion exchange, the high concentration acid medium in the sample is converted into an aqueous medium. The converted solution (Rb, Sr, Y, Cs, Ba, Pb, Th, etc.) flows out of the ion exchange chamber outlet 11 and enters ICP-MS for measurement.

Meanwhile, pure water enters the cathode chamber 3 from the cathode chamber inlet 13, the power supply 9 is connected with the cathode 6 through the lead 8, and the pure water is electrolyzed on the cathode 6 under a certain voltage, wherein the reaction formula is as follows:

2H₂O+2e＝2OH^-+H₂↑

OH produced by electrolysis^-Selectively transferring to an exchange chamber 1 through an anion exchange membrane 4 under the action of a direct current electric field to regenerate a spent anion exchange resin 5, wherein the reaction formula is as follows:

R-X+OH^-＝R-OH+X^-

the electrolyzed pure water is discharged from the outlet 14 of the cathode chamber and is connected to the inlet 12 of the anode chamber, and the pure water is electrolyzed at the anode 7 of the anode chamber 2 to generate H⁺At the same time, X is exchanged^-Selectively migrate to the anode chamber 2 through the anion exchange membrane 4' under the action of the DC electric field, and react with H⁺Combined into HX and then discharged from anode chamber outlet 15. The reaction formula is as follows:

H₂O-2e＝2H⁺+1/2O₂↑

X^-+H⁺＝HX

the utility model discloses a great surface area's porose titanium base platinization is as electrode material, and porous electrode can regard as electrode and electrolyte passageway simultaneously, has simplified the device structure, has higher electrodialysis ion exchange efficiency.

In the utility model, the cathode chamber 6 and the anode chamber 7 electrolyze water to generate OH^-And H⁺Therefore, the electrolyte from the outlet 13 of the cathode chamber can be circulated to the inlet 12 of the anode chamber, and only one flow path is adopted to realize the electrolysis of water in the cathode chamber and the anode chamber, thereby simplifying the device and reducing the cost.

The above description is not intended to limit the present invention, and it should be noted that, for those skilled in the art, many changes, modifications, additions or substitutions can be made without departing from the scope of the present invention, and such changes and modifications should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides an electrodialysis ion exchange device, characterized in that, the device include ion exchange chamber (1), anode chamber (2) and positive pole (7), cathode chamber (3) and negative pole (6) and power (9), anode chamber (2) and ion exchange chamber (1) between be equipped with strong alkaline anion exchange membrane (4'), be equipped with strong alkaline anion exchange membrane (4) between cathode chamber (3) and ion exchange chamber (1), cathode chamber (3) seted up cathode chamber entry (13) and cathode chamber export (14), anode chamber (2) seted up anode chamber entry (12) and anode chamber export (15).

2. Electrodialysis ion exchange unit according to claim 1, characterized in that the ion exchange compartment (1) is provided with a compartment inlet (10) and a compartment outlet (11).

3. Electrodialysis ion exchange unit according to claim 1, characterized in that the ion exchange chamber (1) is filled with strongly basic anion exchange resin (5).

4. An electrodialysis ion exchange unit according to claim 1, wherein the anode compartment (2) and cathode compartment (3) are cell-shaped electrode compartments, and the anode (7) and cathode (6) are the same size as the electrode compartments.

5. An electrodialysis ion exchange unit according to claim 1, wherein the anode (7) and cathode (6) are titanium-based platinized porous metal material.

6. An electrodialysis ion exchange device according to claim 5, wherein the porous metal material has a pore size of 50 μm.

7. An electrodialysis ion exchange unit according to claim 1, wherein the cathode (6) and the anode (7) are connected to a power source (9) through metal wires (8).

8. An electrodialysis ion exchange unit according to claim 1, wherein the detection means for analyzing the test sample is an inductively coupled plasma mass spectrometer.