WO2013008873A1

WO2013008873A1 - Aqueous solution for purification purposes, and method for producing same

Info

Publication number: WO2013008873A1
Application number: PCT/JP2012/067776
Authority: WO
Inventors: 一実前田; 藤井　茂樹
Original assignee: Maeda Kazumi; Fujii Shigeki
Priority date: 2011-07-12
Filing date: 2012-07-12
Publication date: 2013-01-17
Also published as: KR20140019487A; KR101424140B1; JP5100865B1; JP2013017964A

Abstract

An aqueous solution for purification purposes according to the present invention is produced by dissolving a silicate mineral in an aqueous inorganic acid solution to cause the elution of a metal ion from the solution.

Description

Purification aqueous solution and process for producing the same

The present invention relates to an aqueous solution containing a mineral component and metal ions as main components and a method for producing the same.

Conventionally, an aggregating agent that aggregates contaminants in wastewater by adding an inorganic aqueous solution eluting mineral components such as rocks to the wastewater is known.

Patent Document 1 discloses an inorganic acid aqueous solution for purifying sewage obtained by eluting granite, basalt, peridotite and clay mineral in an inorganic acid, and a sewage purification method using the same. According to this invention, since all the components contained in the inorganic acid aqueous solution are derived from natural products, it is possible to purify sewage without giving an environmental load.

JP 2010-5532 A

However, with the conventional technology, it is possible to agglomerate and remove the pollutants contained in the wastewater, but it is difficult to remove microorganisms such as bacteria or bacteria in the wastewater. For this reason, in order to purify the sewage and use it as clean water, it is necessary to further sterilize after removing the contaminants. In addition, in the conventional technology, an inorganic acid having a high acid concentration is used to elute the mineral component. Therefore, although the environmental load is low with respect to the contained component, the solution itself has strong irritation. . For this reason, although it is suitable for use in water purification facilities, etc., it is difficult to use it for water that comes in direct contact with people or plants such as baths and agricultural water, and the range of use is limited to a narrow range. There is a problem.

The present invention has been made in view of such circumstances, and a main object thereof is to provide an aqueous solution for purification that can solve the above-described problems and a method for producing the same.

In order to solve the above-described problem, a method for producing a purification aqueous solution according to one aspect of the present invention includes a step (a) of adding a silicate mineral to an inorganic acid aqueous solution and eluting components contained in the mineral, Elution of metal ions in the aqueous inorganic acid solution (b).

In this aspect, the method may further include a step (c) of neutralizing the inorganic acid aqueous solution between the step (a) and the step (b).

In this embodiment, in the step (b), it is preferable to elute metal ions in the inorganic acid aqueous solution by electrolysis.

In this embodiment, in the step (b), the electrolysis is preferably performed by applying a direct current of 100 mA or more and 200 mA or less within 10 minutes per liter of the inorganic acid aqueous solution.

In this embodiment, the metal ions are selected from the group consisting of silver ions, copper ions, gold ions, platinum ions, nickel ions, and zinc ions.

In this embodiment, the silicate mineral is selected from the group consisting of granite, meteorite, chlorite, basalt, meteorite, and corrosive rocks thereof.

In this embodiment, the inorganic acid aqueous solution is an aqueous solution of an acid selected from the group consisting of sulfuric acid, hydrochloric acid, nitric acid and phosphoric acid.

In this embodiment, in step (c), it is preferable to perform neutralization so that the acid concentration of the solution is in the range of 5.0 to 7.0 in terms of pH.

The purification aqueous solution of one embodiment of the present invention can be obtained by dissolving a silicate mineral with an inorganic acid aqueous solution and eluting metal ions.

The purifying aqueous solution and the production method thereof according to the present invention can provide the purifying aqueous solution applicable to various uses.

Hereinafter, preferred embodiments of the present invention will be described.

In this embodiment, vermiculite, which is a weathered rock of a mica-based mineral, is used as a raw material. First, a method for producing a purification aqueous solution according to the present embodiment will be described below. In the present embodiment, first, vermiculite as a raw material is added to a dilute sulfuric acid aqueous solution diluted to 25%. Here, vermiculite and dilute sulfuric acid aqueous solution are used in such an amount that the volume ratio is 1: 1. Next, the dilute sulfuric acid aqueous solution added with vermiculite is stirred for about 3 hours while being heated to about 80 ° C. As a result, mineral components such as silicon, aluminum, magnesium, iron, magnesium, potassium, and sodium contained in vermiculite are eluted into the dilute sulfuric acid aqueous solution, and become sulfates or oxides. Next, sodium hydrogen carbonate is added to the obtained aqueous solution (pH is 0.5 or more and 1.0 or less), and neutralization treatment is performed so that the pH becomes 6.0 or more and 6.5 or less. Then, after filtering the obtained aqueous solution and removing a residue, an inorganic aqueous solution is obtained by adding the same amount of purified water as the obtained aqueous solution. Further, a silver electrode and a platinum or titanium electrode are inserted into the obtained inorganic aqueous solution, and the silver electrode is connected to the anode and the platinum or titanium electrode is connected to the cathode to give a direct current. At this time, the direct current is applied in the range of 100 mA to 200 mA. The energization time was within 10 minutes per liter of the obtained inorganic aqueous solution. As a result, the silver electrode connected to the anode is electrolyzed and silver ions are eluted in the solution. The purification aqueous solution is obtained by the above steps.

The aqueous solution for purification obtained as described above contains various minerals, sulfates, and oxides. The aqueous solution for purification according to the present embodiment containing these components has an effect of aggregating impurities such as suspended solids by charge neutralization, and also precipitates and aggregates organic matter dissolved in water. It also has an effect. In the present embodiment, the content of each mineral was 30 ppm for silicon, 12000 ppm for aluminum, 8000 ppm for iron, 7000 ppm for magnesium, 2000 ppm for potassium, and 90 ppm for sodium.

Moreover, the aqueous solution for purification according to the present embodiment contains silver ions. Silver ions have a strong bactericidal effect against various bacteria including bacteria. The silver ion content in the purification aqueous solution obtained by the above production method is about 80 to 90 ppb. When silver ions of this level are included, it is considered that the above-described bactericidal effect is sufficiently obtained.

Further, the purification aqueous solution according to the present embodiment is neutralized. In general, it is known that a strongly acidic solution has a high bactericidal effect. However, a strongly acidic solution is strongly irritating to humans and plants, and although a bactericidal effect is obtained, it has adverse effects such as rough skin and inhibition of growth. For this reason, in this Embodiment, the irritation | stimulation with respect to a human and a plant is relieve | moderated by neutralizing so that pH may become the range of 5.0 or more and 7.0 or less which is weak acidity.

From these effects, the purification aqueous solution according to the present embodiment can be applied to various uses. Hereinafter, the use and effect of the aqueous solution for purification according to the present embodiment will be described.

The aqueous solution for purification according to the present embodiment can be used as a purification agent by adding it to agricultural water. When the purification aqueous solution according to the present embodiment is added to agricultural water, suspended substances and organic substances in water are aggregated as described above. For this reason, impurities in agricultural water can be easily removed. Further, bacteria and the like existing in water can be sterilized by the sterilization effect by silver ions, and contamination of agricultural products by bacteria can be prevented.

Moreover, if the agricultural water to which the aqueous solution for purification is added is used, the mineral of the aqueous solution for purification is added to the agricultural water, so that the growth of the crop can be promoted. Moreover, since the silver ion which the aqueous solution for purification has is added to agricultural water, it is possible to sterilize various bacteria already attached to the agricultural product and protect the agricultural product from diseases by giving it to the agricultural product.

The aqueous solution for purification according to the present embodiment can be used as a purification agent by adding to the water for hydroponics. Since hydroponics grows crops using only water, the water used is the most important factor. For this reason, if the aqueous solution for purification according to the present embodiment is added to the water for hydroponics, impurities in the water for hydroponics can be easily removed as in the case of using the water for agricultural cultivation described above. Can kill various bacteria present in Moreover, the mineral component in the aqueous solution for purification also works as an element for promoting the growth of crops. In addition, the aqueous solution for purification according to the present embodiment has a weakly acidic property and can remove ammonia by neutralization, and thus can promote the growth of crops having nitrile acidity. .

The purifying aqueous solution according to the present embodiment can be used as a bath agent. When the purifying aqueous solution according to the present embodiment is used as a bath agent, the mineral component contained in the purifying aqueous solution can bring about the same effect as a hot spring and promote blood circulation. In addition, the effect of promoting blood circulation also has the effect of making it difficult to cool down after taking a bath.

Further, the purification aqueous solution according to the present embodiment can agglomerate suspended substances and organic substances in water with various mineral components, and can sterilize various bacteria with silver ions. For this reason, if it is used in a facility where a plurality of people bathe at the same time, such as a large bath, etc., it is possible to agglomerate and eliminate hot water dirt, and at the same time sterilize various bacteria. It can be kept clean.

The aqueous solution for purification according to the present embodiment can be used as an additive for purifying water for beverages. When the purification aqueous solution according to the present embodiment is added to water, various bacteria in the water can be sterilized, so that bacteria that cause infectious diseases such as pathogenic Escherichia coli can be easily eliminated. In addition, since suspended substances and organic substances in water can be agglomerated, it is possible to eliminate impurities contained in water by adding a purification aqueous solution and then filter through a filter to make water suitable for beverages. it can.

Also, the purification of drinking water using the purification aqueous solution according to the present embodiment may be performed by adding the purification aqueous solution and then filtering. Therefore, impurities in water can be eliminated without using electricity or the like. Moreover, since various bacteria or impurities can be excluded, water from various water sources such as ponds, rivers, rainwater, and wells can be used as water to be purified. For this reason, it is particularly suitable for the purification of emergency water during disasters.

The aqueous solution for purification according to the present embodiment can be used as a spray agent that can be deodorized, deodorized or sterilized by spraying on an object. The aqueous solution for purification according to the present embodiment contains silver ions and can sterilize various bacteria. By this bactericidal effect, the odor derived from bacteria can be deodorized or deodorized. Moreover, the mineral contained in the aqueous solution for purification has an effect of decomposing organic matter. For this reason, the odor derived from organic substance can be deodorized or deodorized.

The aqueous solution for purification according to the present embodiment can be used as an additive to add deodorant and antibacterial effects to added fibers and the like by adding them to the fibers and the like. A fiber containing silver ions and various minerals can be obtained by adding the fiber to the fiber by, for example, immersing the fiber in the purification aqueous solution according to the present embodiment. Thereby, since the fiber itself has an effect of decomposing organic matter and a sterilizing effect against bacteria, a fiber having a deodorizing and antibacterial effect can be obtained.

In this embodiment, vermiculite, which is a weathered rock of a mica-based mineral, is used as a raw material, but the present invention is not limited to this. For example, other minerals or weathered minerals may be used as long as they have various mineral components and can be dissolved in an inorganic acid aqueous solution. Here, among mineral components contained in minerals, it is known that silicon promotes an aggregating action of impurities. For this reason, in this invention, it is preferable to use silicate minerals, such as granite, aragonite, chlorite, basalt, aragonite, or these weathered rocks with high silicon content.

In this embodiment, silver ions are contained as a main component. This is because silver ions have a higher bactericidal power against various bacteria such as bacteria than other metal ions. For this reason, in this invention, it is preferable to add a silver ion as a metal ion. However, the present invention is not limited to this, and other metal ions such as copper ions, gold ions, platinum ions, nickel ions, or zinc ions may be used as long as they have a bactericidal effect. Good.

In this embodiment, the silver ion content is about 80 to 90 ppb, but the present invention is not limited to this. If the silver ion content is less than 20 ppb, the silver ion content is low, so the sterilization effect by silver ions is reduced. On the other hand, when the content rate of silver ions exceeds 1000 ppb and becomes a high concentration, the sterilization effect by silver ions becomes excessively high, and even useful bacteria in water are killed. Further, if silver ions are adsorbed on fish gills, they may inhibit fish gill respiration, so that it is not preferable that silver ions are contained at a high concentration from the viewpoint of environmental compatibility. For these reasons, the silver ion content is preferably in the range of 20 to 1000 ppb.

In this embodiment, a dilute sulfuric acid aqueous solution is used as the solvent, but the present invention is not limited to this. For example, an aqueous solution of an inorganic acid such as hydrochloric acid, nitric acid, or phosphoric acid may be used as long as it can dissolve minerals.

In this embodiment, the mineral component is eluted in the inorganic acid aqueous solution by adding the mineral to the inorganic acid aqueous solution, and heating and stirring. However, the present invention is not limited to this. For example, the mineral component may be eluted in the inorganic acid aqueous solution by adding the mineral to the inorganic acid aqueous solution and leaving it for several days with occasional stirring.

In this embodiment, silver ions are eluted by electrolysis. However, since a large amount of ions are eluted, it is preferable to use electrolysis in the present invention. However, the present invention is not limited to this, and as long as ions are eluted, means such as adding silver before neutralization and leaving it for a long time may be used.

In the present embodiment, platinum or titanium is used for the cathode in electrolysis, but the present invention is not limited to this. For example, any material that is stable and hardly causes a reaction such as copper or carbon may be used.

In this embodiment, when silver ions are eluted, a direct current is applied in the range of 100 mA or more and 200 mA or less, and the energization time is within 10 minutes per liter of the inorganic aqueous solution. This is because, if energization exceeds the range of the current value, a precipitate is formed in the aqueous solution due to precipitation of the contained mineral component. However, the present invention is not limited to this, and if the mineral component does not precipitate, or if a sufficient mineral component is contained in the aqueous solution even after energization, a direct current exceeding these ranges is applied. Also good.

In this embodiment, sodium hydrogen carbonate was added and neutralization treatment was performed, but the present invention is not limited to this, and other alkaline substances can be used as long as neutralization treatment can be performed. It may be used.

The aqueous solution for purification and the production method thereof according to the present invention are useful as a purification agent applicable to various uses.

Claims

Adding a silicate mineral to the aqueous inorganic acid solution and eluting the components contained in the mineral (a);
Eluting metal ions in the aqueous inorganic acid solution (b);
A process for producing an aqueous solution for purification.
A step (c) of neutralizing the aqueous inorganic acid solution between the step (a) and the step (b);
The manufacturing method of the aqueous solution for purification | cleaning of Claim 1.
In the step (c), neutralization is performed so that the acid concentration of the solution is in the range of 5.0 to 7.0 in terms of pH.
The manufacturing method of the aqueous solution for a purification | cleaning of Claim 2.
In the step (b), metal ions are eluted in the inorganic acid aqueous solution by electrolysis.
The manufacturing method of the aqueous solution for a purification | cleaning in any one of Claims 1 thru | or 3.
In the step (b), the electrolysis is performed by applying a direct current of 100 mA or more and 200 mA or less within 10 minutes per liter of the inorganic acid aqueous solution.
The manufacturing method of the aqueous solution for purification | cleaning of Claim 4.
The metal ions are selected from the group consisting of silver ions, copper ions, gold ions, platinum ions, nickel ions, and zinc ions.
The manufacturing method of the aqueous solution for a purification | cleaning in any one of Claims 1 thru | or 5.
In the step (b), the metal ions are eluted so that the content of the metal ions is 20 ppb or more and 1000 ppb or less.
The manufacturing method of the aqueous solution for purification | cleaning of Claim 1 thru | or 6.
The silicate mineral is selected from the group consisting of granite, meteorite, chlorite, basalt, meteorite, and corrosive rocks thereof.
The manufacturing method of the aqueous solution for a purification | cleaning in any one of Claims 1 thru | or 7.
The inorganic acid aqueous solution is an aqueous solution of an acid selected from the group consisting of sulfuric acid, hydrochloric acid, nitric acid and phosphoric acid.
The manufacturing method of the aqueous solution for a purification | cleaning in any one of Claims 1 thru | or 8.
Adding a purification aqueous solution obtained by the method for producing a purification aqueous solution according to any one of claims 1 to 9 to the water to be purified;
Filtering the purified water to which the purification aqueous solution has been added;
A method for producing drinking water.
An aqueous solution for purification obtained by dissolving silicate minerals with an aqueous inorganic acid solution and eluting metal ions.
The metal ion content is 20 ppb or more and 1000 ppb or less.
The aqueous solution for purification according to claim 11.