JP2010137123A - Mineral supplying agent and water treatment method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an appropriate mineral supplying agent for supplying ultrapure water from which contained ion components have been removed with a mineral component of a moderate concentration eluted from the supplying agent, and to provide a water treatment method using the mineral supplying agent. <P>SOLUTION: The mineral supplying agent which is a carrier made of a clay powder molded into a grain and supporting carbonate powder, is obtained by mixing and stirring water, the carbonate powder of organism origin, and one or more kinds of clay powder selected from the group consisting of gairome-clay, Kibushi-clay, oceanic soil, and sepiolite, molding the mixture into a grain, and drying and calcinating the mold. By bringing the mineral supplying agent into contact with the ultrapure water from which the contained ion components have been removed and whose hardness is 0 ppm and pH value is 5 to 7, the mineral components are eluted from the mineral supplying agent and supplied to the ultrapure water to thereby adjust the hardness of the ultrapure water brought into contact with the agent to 3 to 30 ppm and the pH value thereof to 6 to 8. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a mineral component supply agent suitable for imparting a mineral component when using ultrapure water from which dissolved ion components have been removed for use as drinking water, water for ornamental fish, water for cultured fish, and the like. The present invention relates to a water treatment method using a supply agent.

  In recent years, mineral water collected in various places in and outside the country has been marketed due to distrust of tap water. Many water purifiers for removing chlorine and trihalomethane in tap water are also commercially available, and so-called “delicious water” is attracting attention.

  On the other hand, in order to obtain weak alkaline water suitable for the body, as a treatment method for neutralizing water and increasing the pH value, a filter using a calcium filter medium is used, and water is passed through the filter by passing water through the filter. And a calcium component is eluted in water while passing through the filter medium, and the pH value of water is increased to make alkaline water (for example, refer to Patent Document 1). In the method disclosed in Patent Document 1, when all the water is simply passed through the calcium filter medium, the amount of the calcium component eluted with respect to the water is too high, and the high pH is not good for human health. In order to solve this problem, a water treatment filter that is weakly alkaline and suitable for the body is disclosed.

This water treatment filter allows a part of the water introduced into the filter to be diverted and passed through the water treatment agent layer, and this diversion passing water is combined with water that does not pass through other water treatment agent layers, The whole water introduced in is used as weak alkaline water. The water treatment agent layer is composed of a calcium component-containing material such as a ceramic solid containing a calcium component. Examples of the substance containing a calcium component include cinnabar sand, fired cocoons, fired shell fossils, and fired animal bones. Etc. are mentioned.
JP 2004-82081 A (paragraphs [0002], [0003], [0007], [0008], [0041])

  On the other hand, recent advances in reverse osmosis membrane technology have made it possible to quantitatively remove ions and molecules in water. Reverse osmosis water (RO water) obtained by the reverse osmosis membrane method has been attracting attention as a safe water treatment method because it can remove viruses and bacteria that are difficult to remove by ordinary water purification treatment.

  However, since the water obtained by the reverse osmosis membrane method has a neutral pH value immediately after passing through the reverse osmosis membrane and the mineral component is also removed, it has been a so-called “tasteless water”.

  Therefore, focusing on the fact that weak alkaline soft water with a high calcium concentration ratio is called “name water”, we tried to develop a material that dissolves and imparts an appropriate concentration of mineral components to ultrapure water from which dissolved ion components have been removed. It was.

  An object of the present invention is to provide a mineral component supply agent suitable for eluting and imparting a mineral component having an appropriate concentration to ultrapure water from which dissolved ion components have been removed, and a water treatment method using the supply agent. is there.

  Another object of the present invention is to provide a mineral component supply agent capable of adsorbing and purifying heavy metals and ammonium, and a method for treating water using the supply agent.

  The invention according to claim 1 is an improvement of a mineral component supply agent that imparts a mineral component to ultrapure water from which dissolved ion components having a hardness of 0 ppm and a pH of 5 to 7 are removed. The characteristic composition is that one or two or more types of clay-like powder selected from the group consisting of biological carbonate powder, Sasame clay, Kibushi clay, marine soil and sepiolite are mixed and stirred. The mixture prepared in this way is formed into granules, the molded product is dried, and the dried molded product is calcined, and has a granular form in which carbonate powder is supported on a clay powder carrier. is there.

  The invention according to claim 2 is the invention according to claim 1, wherein the average particle size of the clay-like powder before mixing is 0.001 to 0.01 mm, and the biological carbonate powder is a scallop shell. It is a pulverized product and a mineral component supply agent having an average particle size of 0.001 to 0.01 mm before mixing.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the mixture is 30 to 50 parts by mass of biological carbonate powder and 50 to 70 parts by mass of clay powder, carbonate powder and clay It is the mineral component supply agent prepared by mixing and stirring so that it may become the ratio of 20-50 mass parts of water with respect to the total mass of powder.

  The invention according to claim 4 is obtained by contacting the mineral component supply agent according to any one of claims 1 to 3 with ultrapure water from which dissolved ions having a hardness of 0 ppm and a pH of 5 to 7 are removed. A method for treating water characterized by eluting a mineral component from a mineral component supply agent to impart a mineral component to ultrapure water and adjusting the hardness of the contacted ultrapure water to 3 to 30 ppm and pH 6 to 8, respectively. It is.

  The invention according to claim 5 is the invention according to claim 4, wherein, as shown in FIG. 1, the contact between the mineral component supply agent and the ultrapure water is water-permeable and supplied with the mineral component supply agent. This is a water treatment method performed by passing ultrapure water through the first container after it is put in the first container through which the agent does not pass.

  The invention according to claim 6 is the invention according to claim 4, wherein, as shown in FIG. 2, the contact between the mineral component supply agent and the ultrapure water is water-permeable and supplied with the mineral component supply agent. This is a water treatment method performed by immersing the first container in a second container in which ultrapure water is stored after being placed in the first container through which the agent does not pass.

  The invention according to a seventh aspect is the invention according to any one of the fourth to sixth aspects, wherein the ultrapure water is reverse osmosis water or deionized water.

  The mineral component supply agent of the present invention is suitable for eluting and imparting a mineral component having an appropriate concentration to ultrapure water that is not very suitable for beverage use from which dissolved ion components are removed. Further, when ammonium ions and heavy metals remain in the water to be treated, it also has a purification action of adsorbing them.

  With the method for treating water using the mineral component supply agent of the present invention, ultrapure water such as “tasteless water” can be made into delicious water by a safe and simple method. In addition, when ammonium ions or heavy metals remain in the water to be treated, since they also have an action of adsorbing them, the water can be made gentle to the body.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  The mineral component supply agent of the present invention is an improvement of the mineral component supply agent that imparts a mineral component to ultrapure water from which dissolved ion components having a hardness of 0 ppm and a pH of 5 to 7 are removed. The characteristic composition is that one or two or more types of clay-like powder selected from the group consisting of biological carbonate powder, Sasame clay, Kibushi clay, marine soil and sepiolite are mixed and stirred. The mixture prepared in this way is formed into granules, the molded product is dried, and the dried molded product is calcined, and has a granular form in which carbonate powder is supported on a clay powder carrier. is there.

  Mineral component supply agent having a granular form in which carbonate powder is supported on a carrier of clay-like powder, using a natural product that does not use chemicals of biological carbonate powder, the above kind of clay-like powder and water as raw materials Is suitable for eluting and imparting a moderate concentration of mineral components to ultrapure water that is not very suitable for beverage use such as RO water. Moreover, when ammonium ion and heavy metal remain | survive in process target water, it also has an effect | action which adsorbs these.

  By bringing the ultrapure water into contact with the mineral component supply agent of the present invention, mineral components such as calcium ions and magnesium ions are moderately imparted, and the pH becomes weakly alkaline suitable for the body. The treated water after contact with the agent becomes safe drinking water that humans feel delicious when drinking. In addition, when ammonium ions or heavy metals remain in the water to be treated, since they also have an action of adsorbing them, the water can be made gentle to the body.

  The ultrapure water to be treated in the present invention is water from which dissolved ion components having a hardness of 0 ppm and a pH of 5 to 7 are removed. Such ultrapure water is preferably RO water obtained by a reverse osmosis membrane method or deionized water obtained by an ion exchange resin method, but is not limited to water obtained using the above method. There is no particular limitation as long as it is ultrapure water so-called “tasteless water” in which dissolved ions are removed, the hardness is 0 ppm, and the pH is in the range of 5 to 7.

  Biological carbonate powder blended in the mineral component supply agent mainly contributes to supply of calcium source. As this biological carbonate powder, a scallop shell pulverized product (hereinafter referred to as scallop powder) is preferable because it can supply the calcium component most stably and safely. The average particle diameter of the scallop powder before mixing is preferably 0.001 to 0.01 mm from the aspect of speed of elution of the calcium component from the mineral component supply agent after preparation, ease of loading on the carrier component, and the like.

  The clay-like powder blended in the mineral component supply agent mainly contributes to supply of mineral component sources other than calcium, and also functions as a carrier for the supply agent. Furthermore, it functions also as an adsorption action of ammonium ions and heavy metals remaining in the water to be treated. One or more components selected from the group consisting of glazed clay, Kibushi clay, marine soil and sepiolite listed as this clay-like powder, moderately contain mineral components other than calcium. It is also suitable for supporting biologically derived carbonate powder as a calcium source. The average particle size of the clay-like powder before mixing is 0.001 to 0.01 mm, the speed of eluting other mineral components other than the calcium component from the mineral component supply agent after preparation, and biological carbonate powder It is preferable from the degree of loading.

  Sasame clay is a clay made by weathering and depositing granite, including light ash or blue-gray and coarse quartz.

  Kibushi clay is dark ash or brown, contains a lot of organic matter such as carbonized wood fragments, is granulated from the weathered and deposited granite, is very fine particles and highly plasticized clay.

  Marine soil is a clay that has risen on the ground due to geological changes over a period of thousands of years. The average particle diameter is 0.002 mm or less.

  Sepiolite, also known as aorite, is a dense earth-like monoclinic or orthorhombic mineral.

  Table 1 below shows an example of the chemical composition of Sasame clay and Kibushi clay. In addition, the unit of each chemical composition in Table 1 is “mass%”.

In the mixing of biological carbonate powder, clay powder and water, first, biological carbonate powder and clay powder are mixed to form a mixed powder, and then water is added to the mixed powder and mixed. It is preferable to prepare the mixture by stirring. The mixture is prepared in this order in order to adjust the hardness of the mixture by the water to be added, but when it is known how hard it will be at a certain blending ratio, Carbonate powder, clay powder and water may be mixed and stirred at a time to prepare a mixture.

  The mixing ratio of the biological carbonate powder and the clay-like powder is a mineral to be eluted by mixing so that the biological carbonate powder is 30 to 50 parts by mass and the clay-like powder is 50 to 70 parts by mass. It is preferable from the viewpoint of the balance of the components and the stability of the support of the carbonate powder on the carrier of the obtained powdery clay powder. Moreover, it is preferable from the ease of handling at the time of shaping | molding of a molded object, etc. to mix so that the mixing ratio of water may be 20-50 mass parts with respect to the total mass of carbonate powder and clay-like powder.

  Next, a method for producing the mineral component supply agent of the present invention will be described using an example in which scallop powder is used as the biological carbonate powder and cocoon clay is used as the clay-like powder.

  First, scallop powder having an average particle diameter of 0.001 to 0.100 mm and a cocoon clay having an average particle diameter of 0.001 to 0.100 mm are prepared, and scallop powder, cocoon clay and water are mixed at a predetermined ratio. A mixture is prepared by mixing and stirring. If the ratio of water added here is small, it becomes difficult to stir, so uniform mixing cannot be achieved. If the ratio of water is too large, problems such as inability to maintain the shape during molding occur.

  The prepared mixture is then formed into granules. The approximate particle size and shape of the mineral component supply agent to be produced are determined by the size and shape here. Considering the degree of elution of the mineral component from the mineral component supply agent after preparation, it depends somewhat on the proportion of water contained in the mixture, but the molded product is granular with a diameter of 5 to 10 mm and a length of 5 to 10 mm. It is preferable to mold so as to be.

  Next, the molded product is dried. Here, most of the water in the molding is removed by allowing the molding to stand at room temperature in a dry atmosphere for 5 to 10 days, preferably 5 days.

  Finally, the dried molded product is fired. The dried molded product is fired at a temperature of 850 to 1100 ° C. for 6 to 12 hours in an oxygen-containing atmosphere to obtain the mineral component supply agent of the present invention. The reason why the firing temperature of the molded product is within the above range is that the mineral component supply agent dissolves in water at a temperature lower than the lower limit value. When firing at a temperature exceeding the upper limit value, the clay is melted. This is because the surface area of the obtained feed agent decreases and the provision of an appropriate mineral component does not proceed. The reason why the firing time of the molded product is within the above range is that the surface is cracked if it is less than the lower limit value, and the surface area of the supply agent is decreased if the upper limit value is exceeded. Among these, it is particularly preferable to bake at a temperature of 900 to 1150 ° C. for 7 to 10 hours.

  The water treatment method of the present invention comprises the step of bringing the mineral component supply agent of the present invention described above into contact with the ultrapure water from which dissolved ions having a hardness of 0 ppm and a pH of 5 to 7 have been removed to thereby remove the mineral from the mineral component supply agent. The component is eluted, a mineral component is added to the ultrapure water, and the hardness of the ultrapure water that is brought into contact is adjusted to 3 to 30 ppm and pH 6 to 8, respectively.

  If the hardness and pH of the ultrapure water contacted with the mineral component supply agent (hereinafter referred to as treated water) are within the above range, it becomes a degree that humans feel delicious when drinking, and according to the treatment method of the present invention, Ultrapure water called “tasteless water” can be made into delicious water by a safe and simple method. Further, when ammonium ions or heavy metals remain in the water to be treated, the ammonium ions and heavy metals contained in the ultrapure water are adsorbed by the mineral component supply agent due to the contact between the mineral component supply agent and the ultrapure water. Therefore, the treated water obtained by the treatment method of the present invention can be made into body-friendly water.

  As the contact between the mineral component supply agent and the ultrapure water in the water treatment method of the present invention, a predetermined amount of mineral component is contained in the first container 11 that has water permeability and does not pass the supply agent as shown in FIG. After the supply agent 10 is put, the ultrapure water 12 is passed through the first container 11 containing the mineral component supply agent 10. Here, the usage amount of the mineral component supply agent 10 put in the first container 11 can be appropriately adjusted according to the amount of water flowed into the first container 11 and the amount of treatment. The flow rate of the water to be communicated can be adjusted as appropriate depending on the size of the first container and the amount of the mineral component supply agent put in the first container.

  Also, as shown in FIG. 2, after a predetermined amount of the mineral component supply agent 10 is put in the first container 11 having water permeability and through which the supply agent does not pass, the second container 13 storing the ultrapure water 12 is added. You may carry out by immersing the 1st container 11 containing the mineral component supply agent 10 for a fixed time. The soaking time of the first container in this contact method is the blending ratio of the biological carbonate powder and the clay-like powder in the mineral component supply agent put in the first container, the shape of the supply agent, and the first container. The amount is appropriately adjusted according to the amount of mineral component supply agent to be added and the amount of ultrapure water stored in the second container.

  The said contact method can be selectively used according to the processing form of the ultrapure water used as the object.

Next, embodiments of the present invention will be described in detail.
<Examination of calcium source>
Scallop powder was prepared as a calcium source for the mineral component supply agent, and Kibushi clay and Sasame clay were prepared as carrier materials. The composition of scallop powder is shown in Table 2, and a photograph of the scallop powder is shown in FIG.

Then, RO water filter containing the scallop powder 0.4g was 50ml passed through, by a pH meter to pH of the treated water after passing water, ion chromatography hardness (Ca ^2+, the total amount of Mg ²⁺⁾ Each was measured by (IC). The same operation was performed on Kibushi clay, and the pH and hardness of the treated water after passing water were measured.

Moreover, 33 g of scallop powder and 40 ml of water were added to 100 g of Kibushi clay, and stirred well to prepare a mixture. This mixture was formed into granules having a diameter of 5 to 10 mm and a length of 5 to 10 mm, and the molded product was left to dry at room temperature for 5 days in a dry atmosphere. By firing at 9 ° C. for 9 hours, a mineral component supply agent using Kibushi clay as a granular carrier material was produced. In addition, the same operation was performed for the clay, and a mineral component supply agent using the clay was prepared as a carrier material. Then, 1 L of RO water is passed through the filter containing 16 g of the above-prepared mineral component supply agent, and the pH of the treated water after passing through is measured with a pH meter to determine the hardness (total amount of Ca ²⁺ and Mg ²⁺ ). Each was measured by ion chromatography. These results are shown in Table 3 below.

From the results shown in Table 3, the water supply to the raw material alone such as the calcium source and the carrier material had high numerical values for the hardness and pH of the treated water, but the supply agent obtained by mixing and firing the above raw materials It was confirmed that the increase in hardness and pH of the treated water can be suppressed by using.

Next, 1 L of RO water was passed through a filter containing 16 g of scallop powder, and the hardness (total amount of Ca ²⁺ and Mg ²⁺ ) after the water flow was appropriately measured by ion chromatography. The hardness of the obtained treated water is shown in FIG.

As is apparent from FIG. 4, the hardness of the treated water was maintained at around 15 ppm. In addition, with regard to calcium carbonate, pearlite, and cryolite, which can be safely supplied as other calcium sources, an experiment was conducted in the same manner as the above scallop powder. It was suggested that scallop powder is a raw material suitable for providing a calcium source, which can stabilize the hardness of treated water after passing water at a high numerical value.
<Examination of firing temperature when preparing mineral component supply agent>
Next, in preparing the mineral component supply agent, the firing temperature of the molded product was examined.

  To 100 g of Sasame clay, 33 g of scallop powder and 40 ml of water were added and stirred well to prepare a mixture. This mixture is formed into granules having a diameter of 5 to 10 mm and a length of 5 to 10 mm, and the molded product is left to dry at room temperature for 5 days in a dry atmosphere. The dried molded product is further divided into three parts, and contains oxygen. Three types of granular mineral component supply agents were produced by firing at 900 ° C., 1100 ° C., and 1200 ° C. for 9 hours in an atmosphere.

  As shown in FIG. 5, 16 g of the above-prepared mineral component supply agent was laid in a funnel having an inner diameter of 5.6 cm and a depth of 1.2 cm, and 200 ml of RO water was passed through the funnel at a flow rate of about 20 ml / second. It was. The main ion concentration of the treated water after passing was measured by ion chromatography, and the hardness of the water was determined from the obtained numerical value of each ion concentration. In addition, this water flow operation was performed 5 times, and the result shown below has shown the average value.

  The hardness of the treated water after passing water with respect to the firing temperature at the time of preparing the mineral component supply agent is shown in FIG.

As apparent from FIG. 6, the hardness of the treated water after passing water tended to decrease as the firing temperature increased. This is considered to be because the surface area of the mineral component supply agent decreased due to the progress of melting of the clay by firing at a high temperature. From this result, it was confirmed that a suitable temperature range exists for the firing temperature when producing the mineral component supply agent. From the above results, it is estimated that about 950 ° C. is the most suitable firing temperature.
<Examination of ratio of scallop powder to be blended in mineral ingredient supply agent>
Next, the ratio of the scallop powder to be mixed with the mineral component supply agent was examined.

  A mixture was prepared by adding 30 g of scallop powder and 40 ml of water to 100 g of Sasame clay and stirring well. Further, another mixture was prepared by changing the amount of scallop powder from 30 g to 50 g. These mixtures are molded into a 1 cm size sphere, the molded product is left to dry at room temperature for 5 days in a dry atmosphere, and the dried molded product is fired at 900 ° C. for 9 hours in an oxygen-containing atmosphere. By doing so, two types of spherical mineral component supply agents having a size of 1 cm shown in FIG. 7 were produced.

  16 g of the above-prepared mineral component supply agent is laid in the funnel described above, 200 ml of RO water is passed through the funnel at a flow rate of about 20 ml / second, the pH of the treated water after passing is adjusted with a pH meter, and the main ion concentration is ionized. Each was measured by chromatography, and the hardness of water was determined from the numerical value of each ion concentration obtained. In addition, this water flow operation was performed 5 times, and the result shown below has shown the average value.

  The following Table 4 shows the results of water passing using the mineral component supply agent with the blending ratio of scallop powder being 30 parts by mass and 50 parts by mass, respectively.

As shown in Table 4, since the hardness of the treated water after passing water was a low value of around 2 ppm, the amount of the mineral component supply agent used for passing water was doubled to 32 g, but it was examined again. There was no improvement. Here, although the mineral component supply agent with a small proportion of scallop powder shows higher hardness, it is considered that the shape of the mineral component supply agent has an influence on this factor.
<Examination of the shape of mineral component supply agent>
In the above experiment, since the high hardness was not acquired with the treated water after water flow, the shape of the mineral component supply agent was examined here. The above experiment was performed again by changing the shape from a spherical shape having a size of 1 cm shown in FIG. 7 to a granular shape having a diameter of 5 to 10 mm and a length of 5 to 10 mm shown in FIG. The results are shown in Table 5 below.

As is apparent from Table 5, it was found that a clear increase in the hardness of the treated water after water passage was observed as compared with the results of Table 4 described above, and water having a hardness of 10 ppm or more was obtained.
<Examination of carrier materials to be blended in mineral component supply agent>
Prepare three kinds of carrier materials other than the maple clay used in the above experiment: Kibushi clay, marine soil and sepiolite. Add 100 g of these carrier materials to 30 g of scallop powder and 40 ml of water, and mix well. Was prepared. This mixture was formed into granules having a diameter of 5 to 10 mm and a length of 5 to 10 mm, the molded product was left to dry at room temperature for 5 days in a dry atmosphere, and the dried molded product was further dried at 950 in an oxygen-containing atmosphere. Three kinds of granular mineral component supply agents were produced by firing at 9 ° C. for 9 hours each.

  16 g of the above-prepared mineral component supply agent is laid in the funnel described above, 1000 ml of RO water is passed through the funnel at a flow rate of about 20 ml / sec, the pH of the treated water after passing is adjusted with a pH meter, and the main ion concentration is ionized. Each was measured by chromatography, and the hardness of water was determined from the numerical value of each ion concentration obtained. In addition, this water flow operation was performed 5 times, and the result shown below has shown the average value. The results are shown in Table 6 below.

As is apparent from Table 6, when sepiolite was used as the carrier material, the hardness value and pH value were better balanced as delicious water than other materials. This is probably because sepiolite has the highest magnesium content.

  Here, we did not conduct an experiment using Sasame clay as a carrier material. However, Sasame clay is similar in composition to Kibushi clay, so the result is similar to Kibushi clay. Inferred.

From the above results, it is most suitable to use sepiolite as the carrier material, scallop powder as the calcium source, adjust the ratio of scallop powder to 30 parts by mass, and set the calcination temperature to 950 ° C. to appropriately impart the mineral component. It is considered to be a condition.
<Water flow test up to 200L>
30 g of scallop powder and 27 to 40 ml of water were added to 55 g of sepiolite, 5 g of kibushi clay and 10 g of porcelain stone, and the mixture was stirred well to prepare a mixture. This mixture was formed into granules having a diameter of 3 to 6 mm and a length of 5 to 10 mm, and the molded product was left to dry at room temperature for 5 days in a dry atmosphere. Further, the dried molded product was 950 in an oxygen-containing atmosphere. By calcining at 0 ° C. for 9 hours, a granular mineral component supply agent was produced.

  45 g of the above-prepared mineral component supply agent was laid in the funnel described above, and 200 L of RO water was passed through the funnel at a flow rate of about 5.6 ml / second. The ion concentration was measured by ion chromatography, and the hardness of water was determined from the obtained numerical value of each ion concentration. In addition, this water flow operation was performed 5 times, and the result shown below has shown the average value.

  Moreover, the water flow test similar to the said experiment was done using 90g of mineral component supply agents. The results are shown in FIGS.

As apparent from FIGS. 9 and 10, it was found that the hardness of the treated water after passing water is 3 to 15 ppm and the pH is stable in the range of weakly acidic to weakly alkaline. In the experimental example in which the amount of the mineral component supply agent used was 90 g, both hardness and pH were higher.
<Each ion concentration and delicious water index>
Table 7 below shows the ion concentrations of treated water immediately after passing 40 L and treated water immediately after passing 200 L in the 200 L water flow test.

From the results shown in Table 7, it was found that ions eluting from the mineral component supply agent elute potassium and slightly magnesium in addition to calcium.

  Subsequently, when calculating the “delicious water index” shown in the following formula (1) from each ion concentration shown in Table 7 above, 13.2 ppm for treated water immediately after passing 40 L, and for treated water immediately after passing 200 L, The result was 6.87 ppm, which sufficiently satisfied the delicious water index of 2 ppm or more.

<Adsorption experiment using mineral component supply agent>
First, 30 g of scallop powder and 25 ml of water were added to 70 g of Kibushi clay and stirred well to prepare a mixture. This mixture was formed into granules having a diameter of 5 to 10 mm and a length of 5 to 10 mm, the molded product was left to dry at room temperature for 5 days in a dry atmosphere, and the dried molded product was further dried at 950 in an oxygen-containing atmosphere. By calcining at 0 ° C. for 9 hours, a granular mineral component supply agent was produced.

  Next, ammonium sulfate was dissolved in ultrapure water to a concentration of 0.05 mmol, and 50 ml of this ammonium sulfate solution was stored in a beaker.

  Next, 12 g of the mineral component supply agent was immersed in this beaker to maintain a stationary state.

  Subsequently, after 30 minutes have passed since the mineral component supply agent was immersed and held in a stationary state, 750 μL of the solution was sampled after 60 minutes, 90 minutes, and 120 minutes, respectively. Residual ammonium ion concentration, pH, calcium ion concentration, sulfate ion concentration, and hardness were measured using a pH meter and ion chromatography, respectively. The results are shown in FIGS.

  As shown in FIG. 11, the result that the residual ammonium ion density | concentration fell rapidly 90 minutes after mineral component supply agent immersion was obtained. From this result, it was confirmed that the mineral component supply agent exhibits an action of adsorbing ammonium ions present in water by bringing the mineral component supply agent of the present invention into contact with water.

  As shown in FIGS. 12 to 15, the elution of calcium ions and sulfate ions was observed in the contact between the water and the supply agent by immersion, as in the case of contact with water. It turned out to be higher. This is presumed to be due to the longer contact time between water and the supply agent in the contact by immersion. In addition, the hardness showed an increasing tendency as the immersion time increased, but the pH value was maintained between 10 and 11 regardless of the immersion time.

  The mineral component supply agent of the present invention has not only a proper application of mineral components and pH adjustment, but also a purification action of adsorbing ammonium ions, heavy metals, etc. It can also be applied to water usage.

The figure which shows the 1st contact method of the mineral component supply agent and ultrapure water of this invention. The figure which shows the 2nd contact method of the mineral component supply agent of this invention, and an ultrapure water. A photograph of scallop powder. The figure which shows the hardness of the treated water which passed the scallop powder simple substance. The figure which shows water flow using the funnel used for experiment. The figure which shows the relationship of the hardness of the treated water after water flow with respect to the calcination temperature at the time of mineral component supply agent preparation. The photograph figure of the spherical mineral component supply agent whose size used for experiment is 1 cm large. The photograph figure of the granular mineral component supply agent of diameter 5-10mm used for experiment, and length 5-10mm. The figure which shows the relationship between the water flow volume to a mineral component supply agent in the 200L water flow test, and the hardness of the treated water after a process. The figure which shows the relationship between the amount of water flow to a mineral component supply agent and pH of the treated water after a process in a 200L water flow test. The figure which shows the relationship between the immersion time of a mineral component supply agent, and the residual ammonium ion density | concentration of a treated water. The figure which shows the relationship between the immersion time of a mineral component supply agent, and the pH of treated water. The figure which shows the relationship between the immersion time of a mineral component supply agent, and the calcium ion concentration of treated water. The figure which shows the relationship between the immersion time of a mineral component supply agent and the sulfate ion concentration of a treated water. The figure which shows the relationship between the immersion time of a mineral component supply agent, and the hardness of treated water.

Explanation of symbols

10 Mineral Component Supply Agent 11 First Container 12 Ultrapure Water 13 Second Container

Claims (7)

In a mineral component supply agent for imparting a mineral component to ultrapure water from which dissolved ion components having a hardness of 0 ppm and a pH of 5 to 7 are removed,
A mixture prepared by mixing and stirring one or more kinds of clay-like powder selected from the group consisting of biological carbonate powder, Sasame clay, Kibushi clay, marine soil and sepiolite and water. It is obtained by molding into a granule, drying the molded product, and firing the dried molded product, and having a granular form in which the carbonate powder is supported on a carrier of the clay-like powder. Mineral ingredient supply agent.   The average particle size of the clay-like powder before mixing is 0.001 to 0.01 mm, the biological carbonate powder is pulverized scallop shell, and the average particle size before mixing is 0.001 to 0 The mineral component supply agent according to claim 1, which is 0.01 mm.   The mixture is 30-50 parts by mass of biological carbonate powder and 50-70 parts by mass of clay-like powder, so that the total mass of the carbonate powder and clay-like powder is 20-50 parts by mass of water. The mineral component supply agent according to claim 1 or 2, prepared by mixing and stirring.   The mineral component supply agent according to any one of claims 1 to 3 is brought into contact with the ultrapure water from which dissolved ions having a hardness of 0 ppm and a pH of 5 to 7 have been removed, thereby bringing the mineral component supply agent into contact with the mineral component supply agent. The water treatment method is characterized in that the mineral component is added to the ultrapure water and the hardness of the contacted ultrapure water is adjusted to 3 to 30 ppm and pH 6 to 8, respectively.   The contact between the mineral component supply agent and the ultrapure water is such that the ultrapure water is passed through the first container after the mineral component supply agent is passed through the first container that has water permeability and does not pass the supply agent. The water treatment method according to claim 4, which is performed by the following.   After the contact between the mineral component supply agent and the ultrapure water is put in the first container that has water permeability and does not pass through the mineral component supply agent, the second container that stores the ultrapure water contains the The water treatment method according to claim 4, which is performed by immersing the first container.   The method for treating water according to any one of claims 4 to 6, wherein the ultrapure water is reverse osmosis water or deionized water.