JPH0623373A - Water purifying material - Google Patents

Abstract

PURPOSE:To remove a trace amount of a chlorine compd. contained in tap water inexpensively, simply, safely and efficiently by using vegetable org. acids having bitterness or astringency as effective components. CONSTITUTION:A water purifying material contains vegetable org. acids having bitterness or astringency as effective components. A water permeable container or bag is usually packed with this water purifying agent at the time of use. For example, when the water permeable container packed with the water purifying agent is connected to a tap water cock, purified tap water can be always simply obtained. When the water permeable container or bag packed with the water purifying material is immersed in the water of a water tank or bathtub, water can be purified in the same way. The contact treatment temp. of the water purifying agent is usually 1-60 deg.C and may be not necessarily the normal temp.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purification material, and more particularly to a water purification material capable of effectively decomposing and removing chlorine compounds in tap water.

[0002]

2. Description of the Related Art Recently, environmental problems have been attracting attention worldwide, and water quality problems are also a serious problem. Traditionally,
In the case of public tap water, sodium hypochlorite (calcium) is used in the treatment process from the viewpoint of hygiene, and its role is extremely large.

However, in this case, a small amount of a chlorine-based compound is contained in tap water, which causes an odor to be a cause and also has a physiological effect on plants and animals and an adverse effect on the human body. Is considered a problem. However, much research has not been done on the method for removing the chlorine-based compound contained in tap water, and no practically effective method has been found.

[0004]

SUMMARY OF THE INVENTION In view of the above situation, an object of the present invention is to provide a water purification material capable of easily and efficiently removing a chlorine-based compound contained in a small amount in tap water at low cost. It is what

[0005]

Means for Solving the Problems As a result of various studies to achieve the above object, the present inventor found that a specific plant organic acid contained in perennial plants and the like is a chlorine-based compound that remains in tap water. It was found that this chlorinated compound reacts physicochemically and can be easily decomposed and removed from water.

That is, the gist of the present invention resides in a water purification material characterized by using a plant organic acid having bitterness or astringency as an active ingredient. Hereinafter, the configuration of the present invention will be described in detail. The bitter or astringent plant organic acid to be targeted in the present invention is usually a beech family, a plant of the family Rhusaceae, citrus fruits, persimmons, tea, mugwort, butterbur, mainly perennial plants (grass, trees, trees). The organic acids with bitterness or astringency contained in the pericarp, petiole, bark, seeds, etc., so-called bitter astringent acid. Among these, preferable examples include bitter astringent acids contained in the peels of citrus fruits (especially citrus plants) such as mandarin oranges, Hachisaku, oranges, kumquats, and ponkans. In citrus fruits, the inner sachet contains a large amount of citric acid, while the outer skin contains a large amount of bitter-acid. As components of bitter astringent acid, there are usually tannin-based compounds, tar-based compounds, alkaloid-based compounds, and other unclarified structures.

The water purification material of the present invention contains bitter astringent acid as an active ingredient as described above, and may be a product obtained by extracting necessary bitter astringent acid from a plant component or purifying it. The plant itself containing it can also be processed and used. However, in any case, it is important to appropriately control the elution amount and the elution rate of bitter astringent acid in water.

When the plant extract is used as a water purification material,
It is preferably used by being supported on a carrier such as synthetic resin, silica, or alumina. In this case, the amount of bitter astringent acid carried is usually about 0.5 to 10%. In addition, as a supporting method, usually, a carrier powder obtained by uniformly mixing bitter / acidic acid is used as a raw material, and a method of molding this, or a method of impregnating a porous carrier molded into a predetermined shape with bitter / acidic acid, and the like can be mentioned. The form of the water purification material in this case is, for example, a granular material having a particle size of about 1 to 10 mm.

On the other hand, when the plant itself is processed as a water purification agent, it is usually preferable to subject the target plant to heat and drying treatments to control the elution rate of bitter astringent acid into water. That is, the bitter astringent acid contained in the plant can be continuously eluted in water in a trace amount by these treatments. It is important in the present invention that bitter astringent acid is continuously eluted in a trace amount. The conditions of this heating and drying treatment differ depending on the target plant, but, for example, when targeting citrus peel, it is usually 50
5-1 at a temperature of ~ 150 ° C, preferably 70-130 ° C
It takes about 0 hours, and the water content is about 40-80 by this treatment.
% Are removed.

In using the water purification material of the present invention, it is usually filled in a water-permeable container or bag. For example, if a water container filled with the water purification material of the present invention is connected to a tap, it is possible to easily obtain purified tap water. Further, water can be similarly purified by immersing the water-permeable container or bag filled with the water purification material of the present invention in water such as a water tank or a bath. The contact treatment temperature of the water purification material is usually 10 to 60 ° C., and does not necessarily have to be room temperature.

[0011]

EXAMPLES Next, the present invention will be described more specifically by way of examples, but the present invention is not limited to the description of the following examples unless it exceeds the gist. Example 1 3% of tannic acid (for industrial use, pharmacopoeia) extracted from bark of normal oak and quintile, 70% of synthetic resin for soft curing and 27% of fine powder silicon were kneaded, and then molded into granules having a diameter of 6 mm. Then
Then, by hardening this, a granular water purification material was manufactured.

12 g of this granular water purification material was filled in a water passage directly connected to the water tap, and tap water was passed at a flow rate of 3 l / min. The presence or absence of residual chlorine compounds in the treated water immediately after passing this water was judged by color by orthotolidine measurement,
The degree of coloring was zero and the residual chlorine compounds were zero. The orthotolidine measurement is a method in which 2-3 drops of the reagent orthotolidine are added to about 120 cc of water and the residual amount of chlorine compounds is examined by the shade of yellow (colorless is zero).

Further, this water flow treatment test was continuously carried out for 60 days, and the same treated water was judged once a day, but no deterioration in the performance of the granular water purification material was observed. Example 2 150 to 120 g of mandarin orange peel (water content about 60%)
The dried mandarin orange peel (water content was reduced to about 80%) obtained by drying with hot air at a temperature of 0 ° C. for 8 hours was broken into about 20 mm square size by a crusher. A water purification material was prepared by filling a cloth bag with about 80 g of the broken pieces of dried mandarin orange peel.

This water purification material is put into a domestic bathtub, and tap water is fed to the bathtub for about 4 minutes via a boiler immediately connected to tap water.
The mixture was heated to 0 ° C. and about 100 liters were supplied over 20 minutes. Then, after uniformly stirring and mixing the inside of the bath, the presence or absence of residual chlorine compounds in the water was determined by orthotolidine measurement. As a result, there was no reaction and there was no degree of coloration.

For comparison, the same test was carried out without adding the above water purification material, and as a result, a reaction was observed by orthridine measurement and a deep yellow color was exhibited. In addition, when taking a bath in the bath treated with the above-mentioned water purification material of the present invention, the effect as a warm bath material can be obtained together.

[0016]

According to the water purification material of the present invention, especially chlorine compounds in tap water can be easily decomposed and removed. Therefore, the water treated with the water purification material of the present invention has no odor peculiar to tap water, no physiological damage to animals and plants, and no concern to the human body. Further, it can be applied to the treatment of industrial wastewater and household wastewater other than tap water. In addition, since the water purification material of the present invention can use citrus fruits and other peels as a raw material, it is low in cost and highly safe.

Claims (2)

[Claims] 1. A water purification material comprising a plant organic acid having bitterness or astringency as an active ingredient. 2. A crushed product of a dried product containing a bitter or astringent vegetable organic acid obtained by heating and drying a citrus peel at a temperature of 50 to 150 ° C. Item 1. The water purification material according to item 1.