Cesium-adsorbing tea bag, tea bag package, cesium-removing device including the same, and cesium-removing method

Abstract

To provide: a cesium-adsorbing tea bag that can be placed in contaminated water to easily reduce the cesium content; a tea bag package; a cesium-removing device including the same; and a cesium-removing method.SOLUTION: The cesium-adsorbing tea bag contains a cesium-adsorbing material in a tea bag so as to remove cesium from contaminated water. The tea bag package is used by separating such cesium-adsorbing tea bags from a single sheet. The cesium-removing device and method comprise placing the tea bags in contaminated water and efficiently removing cesium through a stirring action.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a cesium adsorbing tea bag, a tea bag package, a cesium removal device including the same, and a cesium removal method. More specifically, the present invention relates to a tea bag package that includes a cesium adsorbing material in a tea bag to remove cesium from contaminated water, a plurality of cesium adsorbing tea bags separated from a single sheet for use, a cesium removal device that places a tea bag in contaminated water and efficiently removes cesium by stirring, and a cesium removal method that uses the same. [Background technology]

[0002] In recent years, the rapid increase in energy demand has led to an increase in the use of nuclear energy as an energy source that can replace fossil fuels and reduce greenhouse gas emissions. However, nuclear energy carries the risk of nuclear accidents, so measures to deal with radioactive materials in the event of a nuclear accident are necessary.

[0003] Radioactive cesium (137Cs) is a radioisotope that is usually released during nuclear accidents, and accounts for 6.3% of fission products. It also has a longer half-life (30 years) than other radioactive contaminants, a small hydration radius, a large diffusion coefficient, and is easily soluble in water, making it difficult to remove with water. When radioactive cesium (137Cs) is absorbed into the human body, it can cause a weakened immune system, infertility, and various cancers, including bone marrow cancer, lung cancer, thyroid cancer, and breast cancer.

[0004] In particular, radioactive cesium is easily ionized in aqueous solution and is therefore difficult to remove through precipitation, filtration, etc. in water, which can pose a major problem when it enters water systems.

[0005] Meanwhile, filters manufactured by rolling up nonwoven fabric with zeolite attached are being offered as filters for adsorbing radioactive cesium. Zeolite has pores of a few nanometers in size and is highly efficient at removing pollutants, so the use of zeolite can achieve the adsorption and removal effect of radioactive cesium.

[0006] However, when such zeolites are used, they adsorb cesium, but after a certain period of time, the cesium separates from the zeolite, and the zeolite has the disadvantage of not functioning as a sufficient decontamination agent. When illite adsorbs cesium, the adsorbed cesium does not separate from the illite, so zeolites have good purification properties for water contaminated with cesium, and in particular, have the advantage of high selectivity for cesium, but there is a lack of easily usable products for this, and related research and development is needed. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Korean Patent Registration No. 10-2447877 [Patent Document 2] Korean Patent Registration No. 10-2161525 [Patent Document 3] Korean Patent Registration No. 10-2152422 [Patent Document 4] Korean Patent Registration No. 10-2018953 [Patent Document 5] Korean Patent Registration No. 10-1332268 Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been made to solve the above problems, and aims to provide a cesium adsorption tea bag, tea bag package, cesium removal device including the same, and cesium removal method, which contain illite as the main component, zeolite, inorganic ion exchange material, and layered clay mineral in a tea bag and place the tea bag in contaminated water to easily reduce the cesium content. [Means for solving the problem]

[0009] One embodiment of the present invention provides a tea bag package in which a plurality of cesium adsorption tea bags are formed so as to be separable, the tea bag package comprising: a first sheet surface; a second sheet surface corresponding to the first sheet surface; the first sheet surface and the second sheet surface overlapping each other, a sheet sealing portion for sealing the edges of each of the plurality of cesium adsorption tea bags; and a cesium adsorption material impregnated inside or in the plurality of cesium adsorption tea bags, the cesium adsorption material containing illite and further containing at least one or a mixture of two or more of zeolite, inorganic ion exchange material, and layered clay mineral. Effect of the Invention

[0010] As described above, the present invention has the effect of removing cesium and radioactive materials from contaminated water over time by placing an appropriate amount of cesium adsorbent material in a tea bag and immersing it in contaminated water. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1(a) shows a front view of the cesium adsorbing tea bag of the present invention, and FIG. 1(b) shows a side view of the cesium adsorbing tea bag of the present invention. [Diagram 2] FIG. 2 shows a conceptual diagram of how the cesium adsorption tea bag of the present invention is placed in a container to adsorb cesium in contaminated water. [Diagram 3] FIG. 3 shows a method for removing cesium using the cesium adsorption tea bag of the present invention. [Figure 4]FIG. 4 shows a method for removing cesium using the cesium adsorbing tea bag of the present invention in a stirrer. [Diagram 5] FIG. 5 shows a schematic diagram of a tea bag package comprising a plurality of cesium-adsorbing tea bags of the present invention. [Figure 6] FIG. 6 is a schematic diagram showing a tea bag package of a plurality of cesium adsorbing tea bags according to the present invention, which allows the cesium adsorbent to flow out. [Figure 7] FIG. 7 shows a schematic diagram of a tea bag package with connecting holes for multiple cesium adsorbing tea bags of the present invention. [Figure 8] FIG. 8 is a schematic diagram of a tea bag package in which a plurality of cesium adsorbing tea bags of the present invention are separated into a tea bag package and connected to connecting holes by connecting lines. [Figure 9] Figure 9(a) shows a state in which multiple cesium adsorption tea bags of the present invention are separated into tea bag packages and the fixing part is open so that they can be connected to the connecting hole with a connecting line for use, Figure 9(b) shows the fixing part in a closed state, Figure 9(c) shows the connecting line fixed to the fixing part, and Figure 9(d) shows the groove in the fixing part. [Figure 10] FIG. 10(a) shows a schematic diagram of a magnetic bar contained in a cesium adsorption tea bag of the present invention, and FIG. 10(b) shows a schematic diagram of a magnetic bar fixed in a cesium adsorption tea bag of the present invention. [Figure 11] FIG. 11 shows a schematic diagram of the cesium adsorbing tea bag of the present invention being stirred in contaminated water by a stirrer. [Figure 12] FIG. 12 is a schematic diagram showing a cesium adsorbing tea bag of the present invention being rotated in contaminated water by a container rotating part. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The invention will now be described in detail with reference to the following drawings. FIG. 1(a) shows a front view of a cesium adsorption tea bag (100A) of the present invention, and FIG. 1(b) shows a side view of a cesium adsorption tea bag (100B) of the present invention. As shown in FIG. 1, the cesium adsorption tea bag (100) of the present invention includes a body (10) having a cesium adsorption material (20) containing illite; a connecting wire (30) connected to one end of the body (10); and a grip (40) connected to the connecting wire (30). The body (10) also includes a first surface (10A); a second surface (10B) corresponding to the first surface (10A); a sealing portion (11) in which the edges of the first surface (10A) and the second surface (10B) are sealed so that the first surface (10A) and the second surface (10B) overlap; and a cesium adsorption material (20) containing illite between the first surface (10A) and the second surface (10B). Here, the second surface (10B) corresponding to the first surface (10A) means that the first surface (10A) and the second surface (10B) have the same area and shape when they are stacked together. The first surface (10A) and the second surface (10B) can be made of a typical paper material used for tea bags, but are not limited thereto.

[0013] The cesium adsorbent material (20) containing illite may be selected from the group consisting of chabazite (CHA), mordenite (MOR), NaA, NaX, faujasite (FAU), Linde Type A (LTA), analcime (ANA), Linde Type L (LTL), EMC-2 (EMT), ZSM-5 (MFI), ferrierite (FER), heulandite (HEU), Betapolymorph A (BEA) and ZSM-12 (MTW), sulfur and zeolite complexes, silicon titanates (US6110378A), crystalline silicotitanate (CST, UOPIE-911), vanadosilicate (WO2015129941A1), metal sulfides (metal sulfides), and the like. The inorganic ion exchange material and layered clay mineral may further include one or a combination of layered clay minerals selected from the group consisting of montmorillonite, smectite, kaolinite, bentonite, hectorite, hectorite fluoride, beidellite, saponite, nontronite, vermiculite, magadite, and mica. For example, when illite, zeolite, inorganic ion exchange material, and layered clay mineral are mixed and used in an appropriate ratio, radioactive materials such as cesium can be more effectively removed.

[0014] Figure 2 shows a conceptual diagram of placing the cesium adsorption tea bag (100) of the present invention in a container (60) to adsorb cesium in contaminated water (50). As shown in Figure 2, when the contaminated water (50) is contaminated with radioactive materials such as cesium and strontium, if the cesium adsorption tea bag (100) of the present invention is placed in the container (60) and a certain period of time passes, the radioactive materials such as cesium and strontium in the contaminated water (50) are adsorbed by the cesium adsorption material (20), and the contaminated water (50) can be purified.

[0015] FIG. 3 shows a flow chart of a method for removing cesium using the cesium adsorption tea bag (100) of the present invention, and FIG. 4 shows a flow chart of a method for removing cesium using the cesium adsorption tea bag (100) of the present invention placed in an agitator. As shown in FIG. 3 and FIG. 4, the contaminated water (50) is brought into contact with the tea bag containing the cesium adsorption material (20), or an agitator can be used to increase the adsorption efficiency while the contaminated water (50) is in contact. When an agitator is used, the probability that radioactive materials such as cesium in the contaminated water (50) will come into contact with the cesium adsorption material (20) due to the flow in the container (60) increases, and the purification efficiency of the contaminated water (50) can be improved.

[0016] FIG. 5 is a schematic diagram of a tea bag package (200) including a plurality of cesium adsorption tea bags (100) of the present invention. The tea bag package (200) including a plurality of cesium adsorption tea bags (100) of the present invention includes a first sheet surface; a second sheet surface corresponding to the first sheet surface; a sheet sealing part (211) for sealing the edges of each of the plurality of cesium adsorption tea bags (100) so that the first sheet surface and the second sheet surface overlap; and each of the plurality of cesium adsorption tea bags (100) contains a cesium adsorption material (20) containing illite. Here, the second sheet surface corresponding to the first sheet surface means that the first sheet surface and the second sheet surface have the same area and shape when overlapped. In the present invention, the surface of each of the plurality of cesium adsorption tea bags (100) is impregnated with the cesium adsorption material (20) containing illite, and the surface can have cesium adsorption properties.

[0017] Each of the cesium adsorption tea bags (100) may have a vertical cut line (210v) and a horizontal cut line (210h). The vertical cut line (210v) has holes at regular intervals in the vertical direction of the line-shaped cesium adsorption tea bag (100), and the horizontal cut line (210h) has holes at regular intervals in the horizontal direction of the line-shaped cesium adsorption tea bag (100). Here, the vertical direction of the cesium adsorption tea bag (100) may be defined as a direction parallel to the long sides of the first and second sheet surfaces, and the horizontal direction may be defined as a direction perpendicular to the long sides of the first and second sheet surfaces. The vertical cut lines (210v) include a left cut line (210L) and a right cut line (210R), and the horizontal cut lines (210h) include an upper cut line (210U) and a lower cut line (210D). Here, the upper cut line (210U) means a line located at the upper part of the cesium adsorption tea bag (100) and separating it from the tea bag package (200) when the cesium adsorption tea bag (100) is separated from the tea bag package (200), and the lower cut line (210D) means a line located at the lower part of the cesium adsorption tea bag (100) and separating it from the tea bag package (200) when the cesium adsorption tea bag (100) is separated from the tea bag package (200). The left cut-off line (210L) is a line located on the left side of the cesium adsorption tea bag (100) and separated from the tea bag package (200) when the cesium adsorption tea bag (100) is separated from the tea bag package (200), and the right cut-off line (210R) is a line located on the right side of the cesium adsorption tea bag (100) and separated from the tea bag package (200) when the cesium adsorption tea bag (100) is separated from the tea bag package (200).

[0018] FIG. 6 is a schematic diagram of a tea bag package (200) capable of discharging the cesium adsorbent material (20) from within a plurality of cesium adsorbing tea bags (100) of the present invention. As shown in FIG. 6, the tea bag package (200) further includes an auxiliary cut line (210SUB) that is parallel to the horizontal cut line (210h), is located below the horizontal cut line (210h), and crosses the cesium adsorbing tea bag (100). The auxiliary cut line (210SUB) allows the cesium adsorbent material (20) inside the cesium adsorbing tea bag (100) to be discharged to the outside as needed without using a separate cutter. Therefore, it has an advantage that it is possible to separate and discard only the cesium adsorbent material (20) from the tea bag after use without cutting the tea bag using a cutter.

[0019] Meanwhile, the length of each of the perforations formed on the upper cut line (210U), lower cut line (210D), left cut line (210L) and right cut line (210R) can be longer than the length of each of the perforations formed on the auxiliary cut line (210SUB). Therefore, when the same force is applied when separating the cesium adsorption tea bag (100) from the tea bag package, the upper cut line (210U), lower cut line (210D), left cut line (210L) and right cut line (210R) are preferentially separated from the tea bag package rather than the auxiliary cut line (210SUB).

[0020] Fig. 7 is a schematic diagram of a tea bag package (200) having a groove (280) for connecting a plurality of cesium adsorption tea bags (100) of the present invention, and Fig. 8 is a schematic diagram of a tea bag package (200) in which a plurality of cesium adsorption tea bags (100) of the present invention are separated into tea bag packages (200) and connected to the groove (280) by a fixing connecting wire (513). As shown in Figs. 7 and 8, when a plurality of cesium adsorption tea bags (100) are each provided with a circular groove (280) for connecting a connecting wire, it has an advantage that when one or more cesium adsorption tea bags (100) are separated from the tea bag package (200) and used, the fixing connecting wire (513) is passed through the groove (280) and fixed to the fixing part (500).

[0021] The tea bag packages of Figures 5 to 7 can be used in each of the forms, or one tea bag package can be used with the vertical cut lines (210v) including the left cut line (210L) and the right cut line (210R), the horizontal cut lines (210h) including the upper cut line (210U) and the lower cut line (210D), the auxiliary cut lines (210SUB), and the groove for the connecting line (280).

[0022] FIG. 9(a) shows a state in which a plurality of cesium adsorption tea bags (100) of the present invention are separated into tea bag packages (200) and the fixing part (500) is open so that the tea bag packages can be connected to the connecting line groove (280) by the fixing connecting wire (513). FIG. 9(b) shows the fixing part (500) in a closed state. FIG. 9(c) shows the fixing connecting wire (513) fixed to the fixing part (500). FIG. 9(d) shows the fixing part (500) with a groove. As shown in FIG. 9, the fixing part (500) of the present invention includes a lower fixed body (510) to which one end of a fixing connection line (513) is fixed, an upper fixed body (520) located on the upper part of the lower fixed body (510), and a rotating machine (530) for adjusting the facing angle between the lower fixed body (510) and the upper fixed body (520). When the lower fixed body (510) and the upper fixed body (520) are in contact with each other in parallel, the fixing connection line (513) is fixed between the lower fixed body (510) and the upper fixed body (520). One end of the fixing connecting wire (513) is fixed to one side of the lower fixed body (510) by adhesive or the like in a hole formed in the connecting wire fixing protrusion (540), and one side of the upper fixed body (520) is provided with a connecting wire fixing groove (550) into which the connecting wire fixing protrusion (540) is inserted, so that when the lower fixed body (510) and the upper fixed body (520) are in contact with each other in parallel, the other end of the fixing connecting wire (513) can be fixed between the lower fixed body (510) and the upper fixed body (520).

[0023] Figure 10(a) shows a schematic diagram of the cesium adsorption tea bag (100) of the present invention containing a magnetic bar (70), and Figure 10(b) shows a schematic diagram of the cesium adsorption tea bag (100) of the present invention with the magnetic bar (70) fixed in it. As shown in Figure 10, when the magnetic bar (70) is placed in the cesium adsorption tea bag (100), the tea bag can have movement due to the rotating magnetic field in the stirrer, and the probability of contact between the cesium adsorption material (20) containing illite and the contaminated water (50) can be increased.

[0024] Here, the lower end of the cesium adsorption tea bag (100) may include a fixing line (75) to provide an area for storing the magnetic bar (70). The fixing line (75) is formed in a direction parallel to the width direction of the cesium adsorption tea bag (100), and the magnetic bar (70) is fixed not parallel to the longitudinal direction of the cesium adsorption tea bag (100), which has the advantage of being able to react more effectively to the stirrer. The magnetic bar (70) is designed so that the diameter of the magnetic bar (70) increases toward both ends of the length, so that it can have a large centrifugal force even with the same magnetic field. The magnetic bar (70) is designed so that the diameters of one end and the other end are different, so that the magnetic bar (70) has an asymmetric structure, and can have a large centrifugal force even with the same magnetic field. Therefore, the cesium adsorption material (20) containing illite in the cesium adsorption tea bag (100) can increase the probability of contact with cesium in the contaminated water (50) and improve the purification effect.

[0025] FIG. 11 is a schematic diagram showing how the cesium adsorption tea bag (100) of the present invention is stirred in the contaminated water (50) by an agitator. As shown in FIG. 11, the cesium removal device includes a support (410); a stirring rotor (420) in which a rotating plate formed of a positive electrode and a negative electrode is rotated by a rotating shaft (421) on the upper part of the support (410); a motor for rotating the stirring rotor (420); a power supply device for driving the motor; a container (60) provided on the upper part of the stirring rotor (420); and a cesium adsorption tea bag (100) soaked in the contaminated water in the container (60) or a cesium adsorption tea bag (100) separated from a tea bag package; here, a bar-shaped electromagnet can be provided inside the cesium adsorption tea bag (100). By using an agitator, the movement of the tea bag in the contaminated water (50) can be controlled, so that the removal rate of cesium in the contaminated water (50) can be increased.

[0026] FIG. 12 is a schematic diagram showing the rotation of the cesium adsorption tea bag in the contaminated water by the container rotation unit. As shown in FIG. 12, the cesium removal device includes a support table (610); a container rotation unit (620) in which a rotating plate rotates by a rotating shaft (630) on the upper part of the support table (610); a motor for rotating the container rotation unit (620); a power supply device for driving the motor; a container (60) provided on the upper part of the container rotation unit (620); and a cesium adsorption tea bag (100) soaked in the contaminated water in the container (60) or a cesium adsorption tea bag (100) separated from a tea bag package; a temperature heating plate (570) for increasing the temperature of the container may be provided on the lower part of the container (60). By using the container rotation unit, the movement of the tea bag in the contaminated water (50) can be controlled, so that the removal rate of cesium in the contaminated water (50) can be increased. Furthermore, by using the temperature heating plate (570), the activation energy of the cesium ion becomes higher, and the reaction with the cesium adsorbent containing illite becomes stronger, so that the removal rate of the cesium in the contaminated water (50) can be increased. The temperature heating plate (570) can be controlled so that the temperature of the contaminated water (50) is between 50°C and 80°C. The temperature heating plate (570) can also be used in the case of the agitator in FIG. 11.

Claims

1. A tea bag package in which a plurality of cesium adsorption tea bags are formed so as to be separable, a first sheet surface; a second sheet surface corresponding to the first sheet surface; the first sheet surface and the second sheet surface overlap each other, a sheet sealing portion for sealing each edge of the plurality of cesium adsorbing tea bags; and a cesium adsorbing material to be impregnated in the interior of the plurality of cesium adsorbing tea bags or the tea bags, The tea bag package is characterized in that the cesium adsorption material contains illite and further contains at least one or a mixture of two or more of zeolite, inorganic ion exchange material, and layered clay mineral.

2. In claim 1, A tea bag package characterized in that each of the plurality of cesium adsorption tea bags has a groove for a connecting wire passing through it.

3. In claim 1, a plurality of tear lines on the first sheet surface and the second sheet surface; the plurality of cut lines comprises vertical cut lines and horizontal cut lines; The vertical cut lines and the horizontal cut lines have perforations in the form of lines on the first sheet surface and the second sheet surface, respectively, spaced apart at regular intervals in the vertical and horizontal directions, the vertical cut line includes a left cut line and a right cut line, the horizontal cut line includes an upper cut line and a lower cut line, and the upper cut line, the lower cut line, the left cut line and the right cut line are lines located at the upper part, the lower part, the left part and the right part of the cesium adsorption tea bag, respectively, when the cesium adsorption tea bag is separated from the tea bag package, and are used to separate the cesium adsorption tea bag from the tea bag package; The method further includes a supplementary cutting line located below the cross cutting line and crossing the cesium adsorption tea bag, A tea bag package, characterized in that the length of each of the perforations formed on the upper cut line, the lower cut line, the left cut line and the right cut line is longer than the length of each of the perforations formed on the auxiliary cut lines.

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