JPH03267146A - Resin composition for preventing water pollution - Google Patents

Abstract

PURPOSE:To obtain a purifying material capable of purifying water with the adsorption of contaminants particularly such as ammonia nitrogen and nitric acid nitrogen by mixing a zinc compound and a sulfate of aluminium with a thermoplastic resin. CONSTITUTION:The resin composition for preventing water pollution is composed of 99.5-50 pts.wt. the thermoplastic resin such as a polyolefin resin and 0.1-50 pts.wt. effective components. As the effective components the zinc compounds such as zinc oxide, zinc carbonate, the sulfates of aluminum such as aluminium sulfate, aluminium potassium sulfate are used. Thus, after the resin composition is granulated, as pellets, etc., the pellets are put into a water tank, and then the pellets adsorb various kinds of the contaminants, especially ammonia nitrogen, nitric acid nitrogen and sulfur components such as hydrogen sulfide, etc. Thus the water in the water tank is purified.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a water pollution prevention resin composition, and more particularly to a water pollution prevention resin composition useful for preventing pollution of various types of water such as aquariums.

(Prior art and its problems) In recent years, as eating habits have improved, tastes have become more sophisticated and sophisticated. In particular, live fish dishes are booming due to the gourmet boom. After these live fish are landed from fishing grounds, they are stored alive by wholesalers from the market, but before they reach consumers, they are further cultivated in tanks at Japanese restaurants, etc., and from landing to cooking. It takes 1 to 3 months. Conventionally, there has been a problem that during this fish farming period, the fish die or become diseased and become unusable, or lose their fresh taste.

These problems are caused by water pollution due to increases in carbon dioxide concentration, ammonia nitrogen concentration, nitrate nitrogen concentration, hydrogen sulfide concentration, etc. in the aquarium, and various methods are used to remove these pollutants. However, simple devices and drugs that can be easily used in individual small-scale restaurants have not yet been developed.

Therefore, an object of the present invention is to provide a water pollution prevention resin composition that can solve the above-mentioned conventional problems and easily prevent water pollution.

(Means for solving problems) The above objects are achieved by the present invention as described below.

That is, the present invention provides a water pollution prevention resin composition comprising 99.9 to 50 parts by weight of a thermoplastic resin and 0.1 to 50 parts by weight of an active ingredient, in which the active ingredient is a mixture of a zinc compound and an aluminum sulfate. This is a water pollution prevention resin composition characterized by the following.

(Function) When a zinc compound and aluminum sulfate are mixed with a thermoplastic resin, for example, granulated into pellets and placed in an aquarium and brought into contact with water, various pollutants generated from fish in the aquarium will be removed. In particular, sulfur content such as ammonia nitrogen, nitrate nitrogen, and hydrogen sulfide is adsorbed, and the water in the aquarium is purified.

(Preferred Embodiments) Next, the present invention will be described in more detail by citing preferred embodiments.

The thermoplastic resin used in the present invention refers to polyolefin resins such as polyethylene and polypropylene, polyvinyl chloride, and vinylon, which have been conventionally used for molding various molded products such as plastic films, plastic sheets, plastic containers, fibers, etc. These thermoplastic resins are synthetic or modified thermoplastic resins such as polystyrene, polyamide, polyester, and cellulose acetate, and all of these thermoplastic resins can be easily obtained and used on the market. It may be in a liquid form such as a base or a liquid form. A particularly preferred thermoplastic resin in the present invention is polyethylene.

The individual active ingredients used in the present invention are all known compounds, and zinc compounds include various zinc compounds, such as zinc oxide, zinc sulfate, zinc chloride, zinc phosphate, zinc nitrate, and zinc carbonate. Inorganic zinc compounds such as zinc acetate, zinc oxalate, zinc citrate, zinc fumarate, zinc formate and other organic zinc salts can be used, and particularly preferred are zinc white (zinc oxide) and zinc carbonate.

The aluminum sulfate used in the present invention is aluminum sulfate [(A12(SO4) s]) and aluminum potassium sulfate [(KAI (SO4) 3]), and potassium aluminum sulfate is particularly preferred.

The ratio of the active ingredients consisting of zinc compounds and aluminum sulfate as described above is also important.If the total amount is 100 parts by weight, the zinc compound is 10 to 90 parts by weight, and the aluminum is 10 to 90 parts by weight. The proportion of sulfate is 90 to 10 parts by weight, and in such a combination and blending ratio, the objects of the present invention are best achieved. If the usage ratio is out of the above range, it cannot be said to be optimal, although there is a pollution prevention effect.

Furthermore, when the total amount of the above active ingredient and the thermoplastic resin is 100 parts by weight, a suitable ratio is 99.9 to 50 parts by weight of the thermoplastic resin and 0.1 to 50 parts by weight of the active ingredient, and the amount of the thermoplastic resin is Too little will make granulation and molding difficult;
If the amount of thermoplastic resin is too large, the antifouling effect will be insufficient.

The water pollution prevention resin composition of the present invention has the above three components as essential components, and various other conventionally known additives for resins,
For example, colorants, fillers, extender pigments, plasticizers, stabilizers,
Ultraviolet absorbers and the like can be optionally added as necessary.

The water pollution prevention resin composition of the present invention may be in powder form, but
A molded product is preferable, and the molded product can also be obtained by simply mixing the above components and compression molding, but in terms of cost, it is better to melt the mixture and granulate it into pellets or the like by extruding the mixture. The particle size of the obtained pellets is approximately 1 to 5 mm.
Although this degree is preferable, it may be finer or coarser depending on the application. Furthermore, it is of course useful as various molded products having a large surface area.

(Example) Next, the present invention will be described in more detail with reference to Examples. In the text, parts or percentages are based on weight unless otherwise specified.

Example 1 20 parts of a mixture consisting of potassium aluminum sulfate and zinc oxide in a weight ratio of 8=2 was blended with 80 parts of low-density polyethylene, mixed in a mixer, and extruded to 40 mm @ (L/D
=28, C, R, =3゜1, screw with dalmage,
Cylinder temperature 130℃, screw rotation speed 70r
pm) to obtain a water pollution prevention resin composition of the present invention in the form of pellets with a particle size of about 3 mm.

Next, 1 kg of the above resin pellets was placed in a 30-mesh woven nylon bag, placed in a 10-pot live fish tank, and 50 sea bream, 50 flounder, and 30 yellowtail were cultivated as test plots, and the test was conducted for 2 months.

During this time, the seawater in the tank was circulated through a 30-mesh woven nylon bag containing I kg of the resin pellets. As a control, 50 sea bream and 5 flounder were placed in another aquarium with the same capacity.
0 fish and 30 yellowtail fish were cultured without adding the pellets. The water pollutants in these two types of aquariums were compared and the results shown in Table 1 below were obtained.

The survival rate was 70% in the control group and 95% in the test group.

Examples 2 to 5 Water pollution prevention resin compositions of the present invention were obtained using the following components and in the same manner as in Example 1, and their performance was measured in the same manner as in Example 1. Similar results were obtained. It was done.

90 parts of high-density polyethylene 10 parts of an 8=2 mixture of zinc oxide and aluminum sulfate 60 parts of a 5-5 mixture of zinc carbonate and aluminum potassium sulfate
40 parts Addition A Polystyrene 55 parts 3=7 mixture of zinc chloride and aluminum sulfate 45 parts Example 5 A molded product with a honeycomb structure was created using the resin pellet Ikg of Example 1 and placed in a 10 rrr live fish tank. As a test plot, 20 sea bream, 50 flounder, and 30 yellowtail were cultivated and tested for two months.

During this time, the seawater in the tank was circulated through the honeycomb layer of the molded product. On the other hand, as a control, 20 sea bream, 50 flounder, and 30 yellowtail were cultured in another aquarium with the same capacity without the above-mentioned molded bodies. By comparison, the results shown in Table 2 below were obtained.

The survival rate was 70% in the control group and 95% in the test group.

Furthermore, when comparing the test plots and the control plots in Examples 1 to 5, it was clearly seen with the naked eye that the seawater in the control plots was turbid, and that the seawater in the test plots was transparent.

(Effects) According to the present invention as described above, when mixed with a thermoplastic resin consisting of a zinc compound and an aluminum sulfate, for example, granulated into pellets and placed in a water tank and brought into contact with water, Various pollutants generated from fish, especially sulfur such as ammonia nitrogen, nitrate nitrogen, and hydrogen sulfide, are adsorbed, and the water in the aquarium is purified.

(1 other person)

Claims (4)

[Claims] (1) In a water pollution prevention resin composition consisting of 99.9 to 50 parts by weight of a thermoplastic resin and 0.1 to 50 parts by weight of an active ingredient, the active ingredient is a mixture of a zinc compound and an aluminum sulfate. Characteristic water pollution prevention resin composition. (2) Claim 1 in which the active ingredients consist of 10 to 90 parts by weight of a zinc compound and 90 to 10 parts by weight of aluminum sulfate.
The water pollution prevention resin composition described in . (3) The water pollution prevention resin composition according to claim 1, wherein the aluminum sulfate is aluminum sulfate or potassium aluminum sulfate. (4) The water pollution prevention resin composition according to claim 1, which is in the form of pellets.