Drinking water treatment materials

Abstract

To provide a drinking water treatment material capable of obtaining hydrogen-containing drinking water while suppressing elevation of hardness.SOLUTION: A drinking water treatment material for treating drinking water is assembled with a porous body including magnesium metal and an ion-exchange resin.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a drinking water treatment material and a filter for treating drinking water. [Background technology]

[0002] Not only humans, but also animals such as pets need to be hydrated. This hydration is achieved not only through food, but also through direct ingestion of water, such as drinking water. It is believed that drinking water can affect health, and healthy drinking water is in demand. Water with hydrogen dissolved in it, so-called hydrogen water, is attracting attention as drinking water for humans because of its health benefits.

[0003] An example of a method for producing hydrogen water is a method in which magnesium is brought into contact with water to generate hydrogen. An example of this method is a method using a reduced water generating agent described in Patent Document 1. Patent Document 1 describes a reduced water generating agent in which a chemical substance powder that is slightly soluble in water and metallic magnesium powder are mixed together, formed into a required size, and sintered, so that the metallic magnesium powder is dispersed and mixed in the sintered body of the chemical substance powder. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2011-255360 A Summary of the Invention [Problem to be solved by the invention]

[0005] Patent Document 1 discloses that hydrogen can be generated for a long period of time by appropriately adding the reducing water generating agent to the water to be treated.

[0006] As mentioned above, hydrogen water is being considered for human consumption as it is believed to be good for health, but little attention has been paid to its use as drinking water for animals other than humans, such as pets.

[0007] Hydrogen water obtained by a method for producing hydrogen water by bringing water into contact with magnesium to generate hydrogen tends to have increased hardness during production. That is, hard water components such as magnesium are eluted into the water from the magnesium-containing material (e.g., the reduced water generating agent described in Patent Document 1) that is in contact with water during production. Furthermore, if the magnesium-containing material contains other hard water components (calcium, etc.), not only magnesium but also the other hard water components are eluted into the water. Due to such elution of hard water components into water, the hardness of the obtained water tends to increase, that is, the water tends to become so-called hard water.

[0008] On the other hand, soft water is sometimes preferred as drinking water. It is also known that if the hardness of drinking water is high, the possibility of developing lower urinary tract diseases such as urinary stones increases, and this tendency is particularly strong in pets, especially cats. For this reason, soft water is even more desirable for drinking water for pets.

[0009] The present invention has been made in consideration of the above circumstances, and aims to provide a drinking water treatment material and a drinking water treatment filter that can obtain drinking water containing hydrogen while suppressing an increase in hardness. [Means for solving the problem]

[0010] As a result of various investigations, the present inventors have found that the above object can be achieved by the present invention described below.

[0011] A drinking water treatment material according to one aspect of the present invention is a drinking water treatment material for treating drinking water, characterized in that it comprises a porous body containing metallic magnesium and an ion exchange resin.

[0012] According to this configuration, it is possible to provide a drinking water treatment material that can obtain drinking water containing hydrogen while suppressing an increase in hardness.

[0013] This is believed to be due to the following:

[0014] It is believed that when the drinking water treatment material is brought into contact with drinking water for treatment, the drinking water first comes into contact with metallic magnesium present on the surface and in the vicinity of the surface of the porous body, thereby generating hydrogen.

[0015] The porous body can also allow the drinking water to penetrate into the interior. It is believed that hydrogen can also be generated by the drinking water that penetrates into the interior of the porous body coming into contact with metallic magnesium present inside the porous body. In the case of hydrogen generation by penetration into the interior of such a porous body, it is believed that hydrogen is generated more slowly than when hydrogen is generated by the drinking water coming into contact with metallic magnesium present on the surface and in the vicinity of the surface of the porous body.

[0016] Furthermore, the porous body may gradually dissolve or disintegrate from the surface by contacting the drinking water, and metallic magnesium may be exposed on the surface and near the surface of the porous body. In such a case, it is considered that hydrogen can be generated by the drinking water coming into contact with metallic magnesium exposed on the surface and near the surface of the porous body. In the case where hydrogen is generated by the gradual dissolution or disintegration of such a porous body, it is considered that hydrogen is generated later than when hydrogen is generated by the drinking water coming into contact with metallic magnesium present on the surface and near the surface of the porous body. In addition, when the drinking water treatment material is used by being housed in a drinking water treatment filter as described later, it is constantly exposed to a water flow, so vibrations are applied to the drinking water treatment material. In addition, when the drinking water treatment material is housed in a PET bottle, for example, vibrations are applied to the drinking water treatment material when drinking water in the PET bottle is drunk. When vibrations are applied to the drinking water treatment material in this way, air present in the porous body provided in the drinking water treatment material moves or is released. At that time, the permeation of drinking water into the porous body progresses. In such a case, hydrogen is generated when drinking water penetrates into the interior of the porous body, and it is believed that this hydrogen generation occurs more slowly than when hydrogen is generated when the drinking water comes into contact with metallic magnesium present on the surface or near the surface of the porous body.

[0017] In addition, even if such a porous body gradually dissolves or disintegrates, it is considered that drinking water that has penetrated into the inside of the porous body can also come into contact with the metallic magnesium present inside the porous body to generate hydrogen. In addition, before the porous body dissolves or disintegrates, it is considered that the drinking water that has penetrated into the inside of the porous body cannot come into contact with the metallic magnesium present inside the porous body, but such dissolution or disintegration of the porous body due to contact with the drinking water is also considered to occur inside the porous body. Therefore, it is also considered that hydrogen is generated by the drinking water coming into contact with metallic magnesium that is present inside the porous body and was not used for hydrogen generation at the beginning. In such a case, it is considered that hydrogen is generated later than when hydrogen is generated by the drinking water coming into contact with metallic magnesium present on the surface and near the surface of the porous body. Furthermore, it is also considered that hydrogen is generated later than when hydrogen is generated by penetrating into the inside of the porous body.

[0018] As described above, since the time when hydrogen is generated varies, it is possible to generate hydrogen over a long period of time, and it is believed that suitable hydrogen water can be obtained.

[0019] In addition, since the drinking water treatment material also includes an ion exchange resin, it is considered that even if the metallic magnesium contained in the porous body dissolves in drinking water, the increase in hardness of the drinking water can be suppressed by ion exchange with the ion exchange resin. Also, even if the porous body contains hard water components other than metallic magnesium, such as calcium, it is considered that even if the porous body gradually dissolves or disintegrates in drinking water, the increase in hardness of the drinking water can be suppressed by ion exchange with the ion exchange resin.

[0020] In addition, it is considered that the ion exchange resin, when contributing to the reduction of hardness by ion exchange, gradually reduces its ability to act on the reduction of hardness. On the other hand, as described above, hydrogen generation by metallic magnesium can also be performed for a long period of time, but since the amount of hydrogen generated by metallic magnesium present on the surface and in the vicinity of the surface of the porous body is large, the amount of hydrogen generated in the initial period is considered to be large. In this case, it is considered that the increase in hardness of drinking water is also large in the initial period due to metallic magnesium present on the surface and in the vicinity of the surface of the porous body. In other words, the increase in hardness of drinking water is also gradually suppressed. From these facts, even if the ability of the ion exchange resin to act on the reduction of hardness by ion exchange is reduced, the increase in hardness of drinking water is also gradually suppressed, so it is considered that the increase in hardness can be suppressed for a long period of time.

[0021] From the above, it is considered that the drinking water treatment material can obtain drinking water containing hydrogen while suppressing an increase in hardness.

[0022] In the drinking water treatment material, the mass ratio of the ion exchange resin to the porous body is preferably 8 to 20 times.

[0023] According to this configuration, drinking water containing more hydrogen can be obtained while suppressing an increase in hardness.

[0024] In the drinking water treatment material, the mass ratio of the ion exchange resin to the metallic magnesium is preferably 32 to 80 times.

[0025] According to this configuration, drinking water containing more hydrogen can be obtained while suppressing an increase in hardness.

[0026] In the drinking water treatment material, the porous body preferably contains silica, and the mass ratio of the ion exchange resin to the silica is preferably 12 to 30. That is, when the porous body contains silica, the mass ratio of the ion exchange resin to the silica is preferably 12 to 30.

[0027] According to this configuration, drinking water containing more hydrogen can be obtained while suppressing an increase in hardness.

[0028] In the drinking water treatment material, the ion exchange resin is preferably a strongly acidic cation exchange resin.

[0029] According to this configuration, the increase in hardness can be further suppressed.

[0030] In the drinking water treatment material, the drinking water is preferably drinking water for pets.

[0031] In the case of pets, particularly cats, hard drinking water tends to cause problems such as lower urinary tract diseases such as urinary stones. By treating drinking water with the drinking water treatment material according to the present embodiment, drinking water containing more hydrogen can be obtained while suppressing an increase in hardness, making it suitable as drinking water for pets.

[0032] In addition, the drinking water treatment material is preferably installed in the storage section so as to be in contact with the drinking water stored in the storage section.

[0033] According to this configuration, drinking water containing hydrogen can be obtained while suppressing an increase in hardness.

[0034] In addition, a drinking water treatment filter according to another aspect of the present invention is a drinking water treatment filter that is at least partially located within a storage tank in a drinking water supply device in which a drinking water intake section is provided above a storage tank that stores drinking water, the drinking water stored in the storage tank is supplied to the drinking water intake section by a circulation pump, and the drinking water supplied to the drinking water intake section is discharged from the drinking water intake section and returned to the storage tank, and the drinking water discharged from the drinking water intake section passes through the filter on its way back to the storage tank, and is characterized in that it contains the drinking water treatment material.

[0035] According to this configuration, it is possible to provide a drinking water treatment filter that can obtain drinking water containing hydrogen while suppressing an increase in hardness. Effect of the Invention

[0036] According to the present invention, it is possible to provide a drinking water treatment material and a drinking water treatment filter that can obtain drinking water containing hydrogen while suppressing an increase in hardness. [Brief description of the drawings]

[0037] [Figure 1] FIG. 1 is a schematic cross-sectional view showing an example of a drinking water dispenser including a drinking water treatment material according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0038] Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to these.

[0039] A drinking water treatment material according to one embodiment of the present invention is a drinking water treatment material that treats drinking water. The drinking water treatment material treats drinking water by contacting the drinking water, for example, by immersing the drinking water in the drinking water. The drinking water treatment material includes a porous body containing metallic magnesium and an ion exchange resin.

[0040] The metallic magnesium generates hydrogen by contacting with drinking water. The metallic magnesium is a component constituting the porous body and is contained in the porous body. The metallic magnesium is preferably present in a dispersed state in the porous body. The porous body may contain not only metallic magnesium but also, for example, magnesium hydroxide, magnesium oxide, magnesium carbonate, and the like. It is believed that metallic magnesium generates hydrogen by reacting with drinking water as shown in the following formula (1).

[0041] Mg+2H2O→Mg(OH)2+H2(1) The metallic magnesium is preferably in the form of particles or powder, for example. The particle size of the metallic magnesium is not particularly limited as long as the metallic magnesium can be dispersed and present in the porous body. The particle size of the metallic magnesium is, for example, preferably 0.5 to 5 μm, more preferably 0.8 to 2 μm, in terms of volume average particle size. If the metallic magnesium is too large, the area of ​​the metallic magnesium that can contact the drinking water becomes relatively small, and the amount of hydrogen generated by the metallic magnesium tends to be small. In addition, the metallic magnesium may be small, but there is a limit to reducing the particle size of the metallic magnesium. In addition, if the metallic magnesium is too small, it tends to easily fall off from the porous body. For these reasons, if the particle size of the metallic magnesium is within the above range, the amount of hydrogen generated by the metallic magnesium becomes suitable, and a suitable drinking water treatment material can be obtained.

[0042] The porous body is not particularly limited as long as it is a porous body containing metallic magnesium. Specific examples of the porous body include porous inorganic materials containing metallic magnesium. Examples of the porous inorganic material include ceramics containing silica, and may be ceramics made of silica. More specific examples of the porous body include porous bodies containing metallic magnesium and silica, and may be ceramics containing metallic magnesium in ceramics containing silica. In addition, components other than the metallic magnesium in the porous body include, for example, not only silica but also zinc oxide and calcium oxide. In addition, other specific examples of the porous body include sintered bodies obtained by firing volcanic rock. In addition, examples of the inorganic material include diatomaceous earth, perlite, zeolite, vermiculite, sintered volcanic ash soil, crushed bakuhan stone, crushed wollastonite, and crushed anorthite. As the porous body, these may be used alone or in combination of two or more. The porous body may be, for example, a porous material in which metallic magnesium capable of generating hydrogen by contacting with water is dispersed and which allows water to penetrate into the porous body. The porous body is preferably a porous body in which the air present inside is moved or released when vibration is applied, so that drinking water can easily penetrate into the porous body. The porous body is preferably a porous body that is gradually dissolved or disintegrated from the surface by contacting with water. By doing so, the metallic magnesium contained in the porous body is gradually exposed by contacting the drinking water treatment material with the drinking water. It is believed that hydrogen is generated from the metallic magnesium for a long period of time.

[0043] The content of the metallic magnesium is not particularly limited, and is preferably an amount that can generate hydrogen by contacting the metallic magnesium with drinking water. The content of the metallic magnesium is, for example, preferably 20 to 40 parts by mass, more preferably 25 to 30 parts by mass, relative to 100 parts by mass of the porous body. The content of components other than the metallic magnesium in the porous body is, for example, preferably 60 to 80 parts by mass, more preferably 70 to 75 parts by mass, relative to 100 parts by mass of the porous body. The component other than the metallic magnesium may contain silica, but in order to reduce the hardness of drinking water, it is preferable that it is not contained. On the other hand, the porous body often contains silica, and even in that case, the content of silica is, for example, preferably 80 parts by mass or less, more preferably 75 parts by mass or less, relative to 100 parts by mass of the porous body. In addition, as described above, the porous body often contains silica, and in this case, the content of silica is, for example, 55 parts by mass or more, and often 65 parts by mass or more, relative to 100 parts by mass of the porous body. More specifically, the porous body may include a porous body containing 25 parts by mass (25 mass%) of the metallic magnesium, 70 parts by mass (70 mass%) of the silica, 1 part by mass (1 mass%) of zinc oxide, and 4 parts by mass (4 mass%) of other components relative to 100 parts by mass of the porous body. If the content of the metallic magnesium is too low, the amount of hydrogen generated by the metallic magnesium tends to be small. Also, if the content of the metallic magnesium is too high, the amount of hydrogen generated by the metallic magnesium will be more than necessary. Also, if the content of the metallic magnesium is too high, the amount of components other than the metallic magnesium will be relatively small, and the shape of the porous body tends to be difficult to maintain. For these reasons, when the contents of the metallic magnesium and components other than the metallic magnesium are within the above-mentioned ranges, the amount of hydrogen generated by the metallic magnesium becomes favorable, and a suitable drinking water treatment material is obtained.

[0044] More specifically, examples of the porous body containing metallic magnesium include magnesium-containing ceramic balls (hydrogen generating ceramic balls) that are commercially available as hydrogen generating materials for drinking water.

[0045] The ion exchange resin is not particularly limited as long as it can reduce the hardness of drinking water by contacting with the drinking water. Examples of the ion exchange resin include cation exchange resins, and among these, strong acid cation exchange resins are preferred. The exchange capacity of the ion exchange resin is preferably 3 to 10 meq / g, more preferably 3 to 6 meq / g.

[0046] The mass ratio of the ion exchange resin to the porous body is preferably 8 to 20 times, more preferably 8.5 to 10 times. The mass ratio of the ion exchange resin to the metallic magnesium is preferably 32 to 80 times, more preferably 34 to 40 times. The mass ratio of the ion exchange resin to the silica contained in the porous body is preferably 12 to 30 times, more preferably 12 to 15 times. If the amount of the ion exchange resin is too small, the increase in hardness of drinking water due to the porous body containing metallic magnesium tends to be insufficient. Also, the amount of the ion exchange resin may be large, but if it is too large, it may become an unnecessary amount for reducing the hardness of drinking water. Also, if the amount of the ion exchange resin is too large, the porous body may become relatively small, and the amount of hydrogen generation may be insufficient. From these points, if the amount of the ion exchange resin is within the above range, drinking water containing more hydrogen can be obtained while suppressing the increase in hardness.

[0047] The drinking water treatment material is not particularly limited as long as it comprises the porous body and the ion exchange resin, and is arranged so that both the porous body and the ion exchange resin are in contact with the drinking water when the drinking water treatment material is brought into contact with the drinking water. The drinking water treatment material may have the porous body and the ion exchange resin in the same region, or the porous body and the ion exchange resin separated from each other. When the porous body and the ion exchange resin are in the same region, the porous body and the ion exchange resin may be mixed.

[0048] From the above, it is considered that the drinking water treatment material can, by contacting drinking water, contain hydrogen while suppressing an increase in the hardness of the drinking water. Therefore, it is considered that the drinking water treatment material can obtain drinking water containing hydrogen while suppressing an increase in hardness. Furthermore, generally, if the amount of ions contained in water is less than 120 mg / L, it is soft water, and if it is 120 mg / L or more, it is hard water. Tap water in Japan is generally soft water. If the drinking water treatment material is contacted with this soft tap water, it can contain hydrogen while maintaining the softness of the water.

[0049] The amount of the drinking water treatment material used is not particularly limited as long as it can secure a desired amount of hydrogen generation and can sufficiently suppress hardness. For example, the amount of the drinking water treatment material used is preferably 1 to 5 g, more preferably 2 to 4 g, of the metallic magnesium in the drinking water treatment material per 1 L of water to be treated.

[0050] When the drinking water is treated by contacting the drinking water with the drinking water treatment material, drinking water containing hydrogen can be obtained while suppressing an increase in hardness. Therefore, as described above, soft water is sometimes preferred as drinking water, and the present invention can be used in such cases. In addition, an example of a case where soft water is preferred is drinking water for pets. The pets (pet animals) for which the pet drinking water is intended are not particularly limited, and examples include dogs, cats, rabbits, and ferrets. In addition, among the drinking water for pets, the drinking water is preferably drinking water for cats. That is, the drinking water obtained by contacting the drinking water treatment material is suitable as drinking water for pets, and is optimal as drinking water for cats. In the case of cats, if the drinking water is hard water, there is a tendency for problems to occur in which the cat is more susceptible to lower urinary tract diseases such as urinary stones. The drinking water treatment material can obtain drinking water containing hydrogen and having a relatively low hardness, so the obtained drinking water is suitable as drinking water for pets, particularly drinking water for cats.

[0051] The manufacturing method of the drinking water treatment material is not particularly limited as long as the drinking water treatment material can be manufactured. For example, the manufacturing method of the drinking water treatment material includes a method of preparing the porous body and the ion exchange resin, and making a drinking water treatment material including them. Specifically, the manufacturing method of the drinking water treatment material may include mixing the porous body and the ion exchange resin. In addition, the manufacturing method of the drinking water treatment material may include a method in which the porous body and the ion exchange resin are not mixed, and when the drinking water treatment material is brought into contact with drinking water, both the porous body and the ion exchange resin are placed in the drinking water treatment material so as to contact the drinking water. In this case, the method may be a method in which the porous body and the ion exchange resin are placed so as to be present in the same region, or a method in which the porous body and the ion exchange resin are placed so as to be present apart from each other.

[0052] The method of use of the drinking water treatment material is not particularly limited as long as it can be used by contacting it with drinking water.

[0053] An example of a method for using the drinking water treatment material is to install it in a storage section so as to come into contact with the drinking water stored in the storage section. An example of this method is to install the drinking water treatment material in a position where it comes into contact with the water when it is poured into a container serving as a storage section for storing drinking water for pets, such as a bowl. That is, it is preferable to install the drinking water treatment material in the storage section so as to come into contact with the drinking water stored in the storage section. According to this method, drinking water containing hydrogen can be obtained while suppressing an increase in hardness, and the drinking water can be consumed by pets, etc.

[0054] The method may, for example, be a method of installing the drinking water treatment material 10 at a position where the drinking water comes into contact with the storage tank (storage section) 21 provided in a drinking water supply device 20 as shown in Fig. 1 when the water is poured into the storage tank (storage section) 21 provided in the drinking water supply device 20. That is, the drinking water treatment material 10 is preferably installed at a position where the drinking water comes into contact with the storage tank (storage section) 21 provided in the drinking water supply device 20 when the water is poured into the storage tank (storage section) 21 provided in the drinking water supply device 20. More specifically, the drinking water treatment filter 24 provided in the drinking water supply device 20 may be a filter containing the drinking water treatment material 10 (a filter containing the drinking water treatment material 10 as a filtering material to be contained in the drinking water treatment filter 24), etc. As shown in Fig. 1, the drinking water treatment filter 24 may be, for example, a drinking water intake section 22, 23 is provided above a storage tank 21 that stores drinking water 26, the drinking water 26 stored in the storage tank 21 is supplied to the drinking water intake section 22, 23 by a circulation pump 25, the drinking water 26 supplied to the drinking water intake section 22, 23 is discharged from the drinking water intake section 22, 23 and returned to the storage tank 21, and at least a part of the drinking water treatment filter 24 is disposed in the storage tank 21 of the drinking water supply device 20, and the drinking water 26 discharged from the drinking water intake section 22, 23 passes through the drinking water treatment filter 24 when returning to the storage tank 21. Fig. 1 is a schematic cross-sectional view showing an example of a drinking water supply device 20 equipped with a drinking water treatment material 10 according to an embodiment of the present invention. The drinking water treatment filter 24 contains the drinking water treatment material 10. In addition, the drinking water treatment filter 24 may house the porous body 10a and the ion exchange resin 10b of the drinking water treatment material 10 at a distance from each other, as shown in FIG. 1. The drinking water treatment filter 24 may house a mixture of the porous body and the ion exchange resin. The drinking water treatment filter 24 may also contain activated carbon mixed with either or both of the porous body and the ion exchange resin. The drinking water treatment filter 24 may also include a nonwoven fabric 11 provided to cover the drinking water treatment material 10. By using such a drinking water treatment filter, drinking water containing hydrogen can be obtained while suppressing an increase in hardness.

[0055] The present invention will be described in more detail below with reference to examples, but the scope of the present invention is not limited to these examples. EXAMPLES

[0056] As the porous body containing metallic magnesium, a hydrogen generating ceramic ball (ORP reduction ball manufactured by Shiobetsu Shun Filter Equipment Factory: Mg (magnesium) 25 mass%, SiO2 (silica) 70 mass%, ZnO (zinc oxide) 1 mass%, other components 4 mass%) was used. In addition, as the ion exchange resin, a strong acid cation exchange resin (water softening resin 001x7 manufactured by Chengdu Oruikai Chemical Co., Ltd.: general grade, exchange capacity 4.55 mmol / g) was used. The drinking water treatment material containing the metallic magnesium and the ion exchange resin, each with the mass (g) shown in Table 1, was contacted with 1000 L of tap water.

[0057] The tap water (drinking water) after contacting with the drinking water treatment material was evaluated using a water hardness checker soft water measuring reagent ("Hardness Indicator 25mL Water Hardness Checker Soft Water Measuring Reagent" manufactured by Maruyama Seisakusho Co., Ltd.). When this water hardness checker soft water measuring reagent is dropped, if the water is hard, it shows red, and if the water is soft, it shows purple, blue-purple, and blue. As the hardness decreases, the color gradually becomes more blue, so even in soft water, purple indicates a relatively high hardness, and blue indicates a lower hardness. In addition, Test Example 1 in Table 1 does not use the porous body containing metallic magnesium or the ion exchange resin, and is tap water. At this time, it shows blue, and it was found that the tap water used was soft water. The test results are shown in Table 1 below.

[0058] In addition, hydrogen was generated in the tap water (drinking water) after contact with the drinking water treatment material. The hydrogen concentration of the drinking water was measured using a dissolved hydrogen concentration determination reagent manufactured by MiZ Corporation. As a result, for example, the hydrogen concentration after 5 minutes from the contact of 500 mL of the drinking water treatment material was 0.045 ppm in the case of Test Examples 2 to 13, and 0.090 ppm in the case of Test Examples 14 to 22. In addition, the hydrogen concentration after 10 minutes from the contact of 500 mL of the drinking water treatment material was 0.070 ppm in the case of Test Examples 2 to 13, and 0.140 ppm in the case of Test Examples 14 to 22. This hydrogen concentration varies slightly for each measurement, but from this result, it can be seen that hydrogen was generated in the tap water (drinking water) after contact with the drinking water treatment material.

[0059] [Table 1]

[0060] As can be seen from Table 1, the drinking water obtained tends to become softer as the amount of ion exchange resin used increases. From this, it can be seen that, for example, in Test Examples 3 to 6 and Test Example 14, where the amount of ion exchange resin used is not large, the hardness is lower than that of Test Example 2, where no ion exchange resin is used, even though the hardness indicator shows red. In addition, when the mass ratio of the ion exchange resin to the porous body (ion exchange resin / porous body) is 8 to 20 times (Test Examples 7 to 13 and Test Examples 15 to 22), it was found that the hardness was sufficiently lowered and soft water was obtained, as shown by the hardness indicator showing purple, blue-purple, and blue. From this, it was found that the ion exchange resin / porous body ratio is preferably 8 to 20 times. In addition, when the mass ratio of the ion exchange resin to the metallic magnesium (ion exchange resin / metallic magnesium) is 32 to 80 times (Test Examples 7 to 13 and Test Examples 15 to 22), the hardness indicator shows purple, blue-purple, and blue, and it was found that the hardness was sufficiently reduced and soft water was obtained. From this, it was found that the ion exchange resin / metallic magnesium ratio is preferably 32 to 80 times. In addition, when the mass ratio of the ion exchange resin to the silica (ion exchange resin / silica) is 12 to 30 times (Test Examples 7 to 13 and Test Examples 15 to 22), the hardness indicator shows purple, blue-purple, and blue, and it was found that the hardness was sufficiently reduced and soft water was obtained. From this, it was found that the ion exchange resin / silica ratio is preferably 12 to 30 times. In addition, when hydrogen generating ceramic balls with a low SiO2 content or high-grade ion exchange resin are used, even if the mass ratio is smaller than the above, the color indicated by the hardness indicator tends to become bluish, that is, the water tends to become soft. [Explanation of symbols]

[0061] 10 Drinking water treatment materials 11 Nonwoven fabrics 20 Drinking water supply equipment 21 Storage Tank 22, 23 Drinking water intake area 24 Drinking water treatment filters 25 Circulation Pump 26 Drinking water

Claims

1. A drinking water treatment material for treating drinking water, A porous body containing metallic magnesium and silica and an ion exchange resin, The mass ratio of the ion exchange resin to the silica is 12 to 30 times, A drinking water treatment material comprising the porous body and the ion exchange resin mixed together.

2. 2. The drinking water treatment material according to claim 1, wherein the mass ratio of the ion exchange resin to the porous body is 8 to 20 times.

3. The drinking water treatment material according to claim 1 or 2, wherein the mass ratio of the ion exchange resin to the metallic magnesium is 32 to 80 times.

4. The drinking water treatment material according to any one of claims 1 to 3, wherein the ion exchange resin is a strongly acidic cation exchange resin.

5. The drinking water treatment material according to any one of claims 1 to 4, wherein the drinking water is drinking water for pets.

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