Container for removing salt matrix from soil hexavalent chromium extracting solution and device applying container

Abstract

The utility model relates to the technical field of extraction equipment, in particular to a container for a soil hexavalent chromium extracting solution salt removal base body and a device applying the container, and aims to solve the technical problem that equipment for rapidly obtaining the soil hexavalent chromium extracting solution salt removal base body for separation and filtration is lacked in the prior art. According to the soil hexavalent chromium extracting solution salt removal matrix container, a communicating hole is formed in the bottom of a container body, and the communicating hole is blocked by a rubber plug; the funnel bottom of the centrifugal tube faces the communicating hole; cation exchange resin is filled in the centrifugal tube; the upper end of the container body is provided with a filter membrane, the first end of the container body is connected with a top cover part, the top cover part is connected to a suction container through an exhaust pipe, and the suction container is filled with an alkaline absorption solution for absorbing carbon dioxide. Dozens of samples can be treated simultaneously, and equipment and containers are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of extraction equipment, in particular to a container for a soil hexavalent chromium extract desalting matrix and a device using the container. Background Art

[0002] Currently, the standard (HJ 1082-2019 Determination of Hexavalent Chromium in Soil and Sediment - Alkaline Solution Extraction-Flame Atomic Absorption Spectrophotometry) uses sodium carbonate-sodium hydroxide as an alkaline leaching agent, resulting in a large amount of sodium salt matrix in the extracted solution. Determination by atomic absorption, inductively coupled plasma atomic emission spectrometry, and inductively coupled plasma mass spectrometry can cause clogging of the burner and atomizer, and produce severe matrix interference.

[0003] Since chromium exists in two valence states, trivalent and hexavalent, and trivalent chromium and hexavalent chromium can be converted into each other, trivalent chromium is more stable in acidic conditions and hexavalent chromium is more stable in alkaline conditions, so the pH value must be controlled when determining hexavalent chromium.

[0004] The traditional method of adding dilute hydrochloric acid or nitric acid to adjust the pH value can only achieve the purpose of simple acid-base neutralization. At this time, there is still a large amount of salt matrix in the solution. Since the leaching agent is alkaline sodium carbonate, a large amount of carbon dioxide will be generated, and direct release will pollute the environment.

[0005] Since the pH of the extract (sodium carbonate-sodium hydroxide extract) is > 11.3, it needs to be adjusted to pH = 7-8 during testing. The use of cation exchange resin can achieve H + and Na in the extract + The exchange of the matrix can achieve the removal of the matrix and can also play a role in adjusting the pH. Since the extract contains a large amount of sodium silicate, aluminum and magnesium, fine suspended precipitation will be produced when the pH is 7-8;

[0006] Therefore, the solution after resin exchange needs to be filtered or centrifuged for solid-liquid separation before instrumental measurement. Since the cation exchange resin will adsorb a large amount of solution, filtration is preferred to obtain more test solution.

[0007] To achieve the above operation, two sets of equipment are usually used for resin exchange and solution separation and filtration, which is time-consuming and labor-intensive and not suitable for large-scale environmental sample pretreatment. The device of the utility model can take into account the use of both processes and can process dozens of samples at the same time. Utility Model Content

[0008] The utility model aims to solve the technical problem in the prior art of lacking equipment for quickly obtaining a desalting matrix for a hexavalent chromium extract of soil, and provides a container for the desalting matrix for the hexavalent chromium extract of soil and a device using the container.

[0009] In order to solve the above technical problems, the technical solutions of the present utility model are as follows:

[0010] Container for soil hexavalent chromium extraction solution desalination matrix, comprising:

[0011] The container body 10 has a communication hole 11 at its bottom, and the communication hole 11 is blocked by a rubber stopper 12;

[0012] A funnel-shaped centrifuge tube 20 is nested in the container body 10 , with the bottom 21 of the centrifuge tube 20 facing the communicating hole 11 ;

[0013] The centrifuge tube 20 is filled with a cation exchange resin 22;

[0014] The container body 10 is capable of removing hexavalent chromium extract from soil;

[0015] A filter membrane 13 is provided at the upper end of the container body 10. The first end of the container body 10 is connected to a top cover component 30. The top cover component 30 is connected to an absorption container 40 through an exhaust pipe 310. The absorption container 40 is filled with an alkaline absorption solution for absorbing carbon dioxide.

[0016] Specifically, the top cover component 30 includes:

[0017] Top cover body 31;

[0018] An extended connecting portion 32 is communicated with the top cover body 31 and is connected to a knob switch valve 33;

[0019] The knob switch valve 33 is connected to a connecting component 34 , and the exhaust pipe 310 is connected to the connecting component 34 .

[0020] Specifically, the bottom 21 of the bucket forms a straight tube 210 , and the communication hole 11 extends into the container body 10 to form a limiting sleeve 220 ;

[0021] The straight tube 210 is clamped in the limiting sleeve 220 .

[0022] Specifically, a limiting ring 230 is formed in the bucket of the centrifuge tube 20 , and the limiting ring 230 is coaxially arranged with the communicating hole 11 .

[0023] The device for using the hexavalent chromium soil extract to desalinate the substrate container also includes:

[0024] The main connecting container 50 has a plurality of vertical connecting pipes 51 provided at its first end;

[0025] The vertical connecting pipe 51 is used to connect the connecting component 34 after the exhaust pipe 310 is removed;

[0026] The second ends of the plurality of vertical connecting tubes 51 are respectively inserted into a corresponding liquid receiving tube 52 , and the liquid receiving tube 52 is arranged in the main connecting container 50 ; and

[0027] Vacuum components.

[0028] Furthermore, the vacuum assembly includes:

[0029] An extraction pipe 61 , one end of which is connected to one side of the main connection container 50 , and the other end of which is connected to the suction end of the air pump 62 ;

[0030] A vacuum gauge 63 is provided on the extraction pipe 61 .

[0031] Furthermore, the main connection container 50 has a top cover 510 , and a connection position 520 is provided on the top cover 510 . The connection position 520 is used to arrange the liquid receiving pipe 52 .

[0032] Furthermore, the rubber stopper 12 can be pulled out of the communicating hole 11 .

[0033] Preferably, the filter membrane is an aqueous polyethersulfone needle filter membrane.

[0034] Preferably, the cation exchange resin 22 is a strongly acidic styrene cation exchange resin with a specification of 732 type.

[0035] The utility model has the following beneficial effects:

[0036] The technical solution of the utility model can be applied to the pre-processing of large quantities of environmental detailed inspection samples, can take into account the use of two processes, and can process dozens of samples at the same time, has the advantages of saving equipment and containers, and significantly improves the efficiency of sample processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0038] Figure 1 This is a schematic structural diagram of the container portion of the desalting matrix for the hexavalent chromium soil extract of the present invention;

[0039] Figure 2 This is a schematic structural diagram of the rubber stopper of the present utility model;

[0040] Figure 3 It is a schematic diagram of the device part of the utility model.

[0041] The reference numerals in the figures indicate:

[0042] Container body 10, connecting hole 11, rubber stopper 12, centrifuge tube 20, bucket bottom 21, cation exchange resin 22, filter membrane 13, top cover component 30, exhaust pipe 310, suction container 40, top cover body 31, extension connection part 32, knob switch valve 33, connecting component 34;

[0043] Straight tube 210, limiting sleeve 220, limiting ring 230;

[0044] Main connecting container 50, vertical connecting pipe 51, liquid receiving pipe 52, extraction pipe 61, air pump 62, vacuum gauge 63, top cover 510, and connecting position 520. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention; it should be noted that in this application, for the convenience of description, the "left side" in the current view is referred to as the "first end", the "right side" is referred to as the "second end", the "upper side" is referred to as the "first end", and the "lower side" is referred to as the "second end". The purpose of such description is to clearly express the technical solution and should not be understood as an improper limitation of the technical solution of this application.

[0046] Please see the attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 The present invention develops a preparation device for a low-salt solution suitable for batch instrument measurement and a method for using the same.

[0047] First, see the attached Figure 1 , Attachment Figure 2 As shown, the container for soil hexavalent chromium extraction solution desalination matrix includes:

[0048] The container body 10 has a communication hole 11 at its bottom, and the communication hole 11 is blocked by a rubber stopper 12;

[0049] A funnel-shaped centrifuge tube 20 is nested in the container body 10 , with the bottom 21 of the centrifuge tube 20 facing the communicating hole 11 ;

[0050] The centrifuge tube 20 is filled with a cation exchange resin 22;

[0051] The container body 10 is capable of removing the hexavalent chromium extract from the soil;

[0052] A filter membrane 13 is provided at the upper end of the container body 10. The first end of the container body 10 is connected to a top cover component 30. The top cover component 30 is connected to an absorption container 40 through an exhaust pipe 310. The absorption container 40 is filled with an alkaline absorption solution for absorbing carbon dioxide.

[0053] The top cover component 30 includes: a top cover body 31; an extended connecting portion 32, which is connected to the top cover body 31 and connected to a knob switch valve 33; the knob switch valve 33 is connected to a connecting component 34, and the exhaust pipe 310 is connected to the connecting component 34.

[0054] The bottom 21 of the bucket forms a straight tube 210 , and the communication hole 11 extends into the container body 10 to form a limiting sleeve 220 ; the straight tube 210 is stuck in the limiting sleeve 220 .

[0055] A limiting ring 230 is formed in the bucket of the centrifuge tube 20 , and the limiting ring 230 is coaxially arranged with the communicating hole 11 .

[0056] For instructions on using the container for soil hexavalent chromium extraction solution desalination matrix, please refer to the attached Figure 1 、 2 、3 as shown:

[0057] Step 1: Place a certain amount of cation exchange resin 22 in a plastic centrifuge tube 20 (which can be placed upright and blocked with a rubber stopper 12 during ion exchange) with a communicating hole 11 at the bottom of a container body 10, and then transfer a certain volume of hexavalent chromium soil extract;

[0058] Step 2: After completing step 1, open the knob switch valve 33 and connect the exhaust pipe 310. The exhaust pipe 310 enters the alkaline absorption solution in the absorption container 40 to absorb the released carbon dioxide;

[0059] Step 3: Tighten the top cover body 31 with the knob switch valve 33 and place it in a horizontal rotary shaker to perform ion exchange. After 20 minutes, the exchange is completed and the exhaust pipe 310 is removed to allow the fine precipitates to adhere to the exchange resin.

[0060] Step 4: Using the hexavalent chromium soil extract to desalinate the substrate container, the main connection container 50 is a glass vacuum box with a fixed liquid receiving pipe 52 inside, an external vacuum pump 62, and a vacuum gauge 63;

[0061] Figure 1 Then unscrew the top cover 31, and the filter membrane 13 is a water-phase polyethersulfone needle filter membrane with a specification of 0.45 microns;

[0062] Tighten the top cover body 31, place it upside down on the main connection container 50, connect the vertical connecting pipe 51 at the bottom, remove the rubber stopper 12 at the bottom of the centrifuge tube 20, unscrew the knob switch valve 33, turn on the vacuum pump 62, and the solution enters the liquid receiving pipe.

[0063] Figure 3 The device for applying soil hexavalent chromium extract to desalination matrix container has the following detailed configuration:

[0064] The main connecting container 50 has a plurality of vertical connecting pipes 51 provided at its first end;

[0065] The vertical connecting pipe 51 is used to connect the connecting component 34 after the exhaust pipe 310 is removed;

[0066] The second ends of the plurality of vertical connecting tubes 51 are respectively inserted into a corresponding liquid receiving tube 52 , and the liquid receiving tube 52 is arranged in the main connecting container 50 ; and a vacuum pumping component.

[0067] The vacuum pumping assembly includes: an extraction pipe 61 , one end of which is connected to one side of the main connection container 50 , and the other end of which is connected to the suction end of the vacuum pump 62 ; a vacuum gauge 63 is provided on the extraction pipe 61 .

[0068] The main connection container 50 has a top cover 510 , on which a connection position 520 is provided. The connection position 520 is used to arrange the liquid receiving tube 52 ; the rubber stopper 12 can be pulled out of the communication hole 11 .

[0069] The above operation can be applied to the pre-treatment of large-scale environmental detailed inspection samples, can be used in two processes, and can process dozens of samples at the same time, which has the advantages of saving equipment and containers and significantly improving the efficiency of sample processing.

[0070] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A container for a soil hexavalent chromium extract desalting matrix, characterized in that: include: The container body (10) has a communicating hole (11) at its bottom, and the communicating hole (11) is sealed by a rubber stopper (12); a funnel-shaped centrifuge tube (20) nested in the container body (10), with the bottom (21) of the centrifuge tube (20) facing the communicating hole (11); The centrifuge tube (20) is filled with a cation exchange resin (22); The container body (10) is capable of removing hexavalent chromium extract from soil; A filter membrane (13) is provided at the upper end of the container body (10), and a top cover component (30) is connected to the first end of the container body (10). The top cover component (30) is connected to an absorption container (40) through an exhaust pipe (310). The absorption container (40) is filled with an alkaline absorption solution for absorbing carbon dioxide.

2. The container for the soil hexavalent chromium extract desalting matrix according to claim 1, wherein: The top cover component (30) comprises: Top cover body (31); An extended connection portion (32) is communicated with the top cover body (31) and is connected to a knob switch valve (33); The knob switch valve (33) is connected to a connecting component (34), and the exhaust pipe (310) is connected to the connecting component (34).

3. The container for the soil hexavalent chromium extract desalting matrix according to claim 2, wherein: The bucket bottom (21) forms a straight tube (210), and the communication hole (11) extends into the container body (10) to form a limiting sleeve (220); The straight tube (210) is clamped in the limiting sleeve (220).

4. The container for the soil hexavalent chromium extract desalting matrix according to claim 3, wherein: A limiting ring (230) is formed in the bucket of the centrifuge tube (20), and the limiting ring (230) is coaxially arranged with the communicating hole (11).

5. A device using the container of the soil hexavalent chromium extract desalting matrix according to claim 4, characterized in that: Also included are: A main connection container (50) having a first end provided with a plurality of vertical connection pipes (51); The vertical connecting pipe (51) is used to connect the connecting component (34) after the exhaust pipe (310) is disassembled; The second ends of the plurality of vertical connecting tubes (51) are respectively inserted into corresponding liquid receiving tubes (52), and the liquid receiving tubes (52) are arranged in the main connecting container (50); and Vacuum components.

6. The device according to claim 5, characterized in that The vacuum assembly includes: An extraction pipe (61), one end of which is connected to one side of the main connection container (50) and the other end of which is connected to the suction end of the air extraction pump (62); A vacuum gauge (63) is provided on the extraction pipe (61).

7. The device according to claim 6, characterized in that The main connection container (50) has a top cover (510), and a connection position (520) is provided on the top cover (510). The connection position (520) is used to arrange the liquid receiving pipe (52).

8. The device according to claim 7, wherein The rubber plug (12) can be pulled out of the communicating hole (11).

9. The device according to claim 5, wherein The filter membrane is an aqueous phase polyethersulfone needle filter membrane.

10. The device according to claim 5, wherein The cation exchange resin (22) is a strongly acidic styrene-based cation exchange resin with a specification of 732 type.

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