WATER PURIFICATION MATERIAL AND WATER PURIFICATION METHOD USING SAME

Abstract

Provided is a purification material capable of highly efficiently removing contaminant components from water. A water purification material has a composition represented by a mixing ratio of zeolite, ferric hydroxide, activated carbon, titanium oxide, and magnesium hydroxide of 6 to 7:1 to 2:0.5 to 1:0.01 to 0.05:0.01 to 0.10 in terms of weight ratio.

Claims

1. A water purification material having a composition represented by a mixing ratio of zeolite, ferric hydroxide, activated carbon, titanium oxide, and magnesium hydroxide of 6 to 7:1 to 2:0.5 to 1:0.01 to 0.05:0.01 to 0.10 in terms of weight ratio.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0028] FIG. 1 is a graph showing the result of a comparative test of the phosphorus adsorption capacity between the article of the present invention and the conventional article in Example.

[0029] FIG. 2 is a graph showing the result of a comparative test of the ammonia adsorption capacity between the article of the present invention and the conventional article in Example.

[0030] FIG. 3 is a graph showing the result of a comparative test of the nitrous acid (NO.sub.2) adsorption capacity between the article of the present invention and the conventional article in Example.

[0031] FIG. 4 is a graph showing the result of a comparative test of the nitric acid (NO.sub.3) adsorption capacity between the article of the present invention and the conventional article in Example.

[0032] FIG. 5 is a graph showing the result of a comparative test of the pH between the article of the present invention and the conventional article in the Example.

[0033] FIG. 6 shows photographs of the states of adhesion of blue-green algae to glass surfaces of fish rearing tanks.

DESCRIPTION OF EMBODIMENTS

Example 1

[0034] Granules having diameters of 2 to 3 mm obtained by mixing zeolite, ferric hydroxide, activated carbon, titanium oxide, and magnesium hydroxide crushed to 30 mesh or less at a weight ratio of 6.5:1.5:0.1:0.01:0.08 and granulating the mixture were used as the present invention. PVA was used as a binder for granulation. Granulating means is not limited, and any means may be used for granulation.

[0035] As a control purifying agent, iron hydroxide (hereinafter referred to as a “conventional article”), which is the main component of a commercially available purification material, was used.

[0036] In each of rectangular water tanks measuring 17 cm wide, 30 cm long, and 24 cm high, 10 L of water, 10 neon tetras, and water plants were put in, and the concentrations of phosphoric acid, ammonia, nitrous acid, and nitric acid in water and the pH in the cases of the article of the present invention and the conventional article were compared. The graphs show the results.

[0037] Measurements were performed at a frequency of once a day by collecting an appropriate amount of water in the water tanks with a dropper. Measuring devices used were as follows.

Phosphoric acid: Measuring device: DIGITALPACKTEST DPM2-PO4 (manufactured by KYORITSU CHEMICAL-CHECK Lab., Corp.)
Ammonia: Measuring device: DIGITALPACKTEST DPM2-NH4 (manufactured by KYORITSU CHEMICAL-CHECK Lab., Corp.)
Nitrous acid: Measuring device: DIGITALPACKTEST DPM2-NO2 (manufactured by KYORITSU CHEMICAL-CHECK Lab., Corp.)
Nitric acid: Measuring device: DIGITALPACKTEST DPM2-NO3 (manufactured by KYORITSU CHEMICAL-CHECK Lab., Corp.)
pH: Portable pH meter WM-32P (manufactured by DKK-TOA CORPORATION)

[0038] Phosphoric acid and ammonium were not detected in water until the 50th day in the case of the article of the present invention, but the concentrations of phosphoric acid and ammonium were respectively 0.03 to 0.04 mg/L and 0.3 mg/L in the case of the conventional article. This result shows that the article of the present invention was greatly superior to the conventional article and provided greater stability of the water quality.

[0039] The nitrous acid content in water in the case of the article of the present invention was also half of the case of the conventional article (after the 20th day). This is caused by the functions of TiO.sub.2, magnesium, and the like, and the difference from the conventional article is clear also in terms of the functions. That is, bacteria have been considered to act on such formation and elimination of nitrous acid, but this result is deemed to show that the causes are the function of the “photocatalyst” and reactions with magnesium. In particular, the decrease after the 20th day defies explanation (by the bacteria theory). The same applies to the comparison result of nitric acid.

[0040] The result of pH summarizes the above results. The pH did not greatly change because the present invention produced less nitric acid and all acids than the conventional article and because alkali was able to be added by magnesium and the like.

[0041] As is clear from the photographs of FIG. 2, blue stains on glass of the water tanks were few. Green mossy algae started to grow on the 15 to 30th days in the case of conventional article, but such algae did not grow even after 50 days in the case of the present invention.

[0042] As shown by the result shown in FIG. 1 above, water was required to be exchanged every 15 to 20 days due to deterioration in the water quality in the case of the conventional article. FIG. 2 shows that mossy algae grew in the water tank with the conventional article on the 30th day or so while mossy algae in the water tank with the present invention grew on the 50th day or later. To sum up these results, the required frequency of exchange of water in the water tank with the present invention was half or less of the case of the conventional article.

[0043] In addition to the present example, experiments were conducted on goldfish, guppies, and the like and provided substantially the same results.