JPH1129405A - Sandbox sterilization method and particles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sterilization method of sandboxes capable of inexpensively sterilizing the sandboxes without adverse effect on the human body and anxiety washed away by rain and to obtain the particles therefor. SOLUTION: This sterilization is carried out by mixing sand in sandboxes with the particulate matter formed by treating titanium oxide with cement when bacteria containing Escherichia coli in the sandboxes are sterilized. In this case, the size of titanium oxide grains formed is a degree the same as that of sand particles. Further, the specific gravity of the particulate substance is a degree the same as that of sand, because specific gravities of titanium oxide and cement are degrees the same as that of sand. The particulate substance is not washed away from the sandboxes with rain water, while the soil on the surface of the particulate substance is washed away and the microbicidal activity is guaranteed over a long period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for sterilizing a sandbox and a particulate material suitable for sterilizing the sandbox.

[0002]

2. Description of the Related Art It is known that many general bacteria including Escherichia coli are breeding in a sandbox, and infants and the like play in the sandbox. Therefore, sterilization of the sandbox is a social problem. Therefore, conventionally, a method such as spraying a disinfectant solution on a sandbox has been adopted.

[0003]

However, the method of spraying a disinfecting solution is not preferable when considering the effect on the human body. Also, when it rains, the disinfectant is washed away by rain,
Since the water penetrates into the ground or flows out of the sand pit, it is necessary to spray a disinfectant every time it rains in order to maintain the sterilizing action, and the amount of use and labor is enormous, and the feasibility is poor. On the other hand, in recent years, attention has been paid to titanium oxide (TiO ₂ ), which has a photocatalytic reaction when exposed to light even at room temperature and exhibits an air purification function, a deodorization function, and an antifouling function. And it is also known to have a bactericidal action. The present invention has been devised with a focus on such titanium oxide (TiO ₂ ).
Another object of the present invention is to provide a sandbox sterilizing method capable of sterilizing a sandbox without incurring a cost without being washed away by rain, and a particle used therefor.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a method for disinfecting bacteria including Escherichia coli in a sandbox, wherein titanium oxide is formed into particles in a sand in the sandbox by cement. Characterized in that mixed particles are mixed. Further, the present invention is characterized in that the particles are formed in a size similar to that of sand particles. Further, the particle body of the present invention is characterized in that powder or particles of titanium oxide are formed to the same size as sand particles by cement.

According to the present invention, titanium oxide (TiO ₂ )
The particles of harmless to humans, even if it touches, do not run away from the sand pit even if it rains, on the contrary, the dirt on the surface of the titanium oxide particles are washed away by the rain, its bactericidal action Is guaranteed over time.

[0006]

Next, an embodiment of the present invention will be described. In the present invention, when sterilizing bacteria including Escherichia coli in a sand pit, particles of titanium oxide (TiO ₂ ) are mixed into sand in the sand pit. Titanium oxide particles are obtained by turning titanium oxide powder or particles into a liquid state using cement and water and solidifying the liquid, and the titanium oxide particles have the same diameter as the sand particles. About 0.5
It is formed with a diameter of about 2.0 mm, and about 10 to 30% of the weight of the obtained particles is titanium oxide. Since titanium oxide and cement have the same specific gravity as sand, the specific gravity of the particles is also about the same as sand, and the particles of titanium oxide are
It does not run away from the sandbox even if it rains. Table 1 shows the test results when such particles were mixed in sand.

[0007]

[Table 1]

In Table 1, A is sand only, B is sand 100
When 5 g (5% by weight) of the particle body is mixed with respect to
Indicates the value of the bacterial count measured by sampling from a depth of 5 cm from the surface of the sand after one week, when 10 g (10% by weight) of the particles were mixed with 100 g of the sand. I have. As is clear from this table, the number of general bacteria was reduced from about 1/8 to 1/20, and the number of coliform bacteria was detected by mixing particles at 5% by weight and 10% by weight with respect to sand. It was found that it decreased significantly below the limit value. Further, the particles do not flow away from the sandbox even if it rains, and conversely, the dirt of the titanium oxide on the surface of the particles is washed away by the rain, and the sterilizing action thereof is guaranteed for a long time.

The particles of the present invention can be used not only for disinfecting sandboxes but also for use in school playgrounds, tennis courts, and the like, and their uses are not limited.

[0010]

As is apparent from the above description, according to the present invention, there is no adverse effect on the human body, there is no risk of being washed away by rain, and a long-term sterilizing action can be achieved without increasing the cost. A method for disinfecting sandboxes and particles can be obtained.

Claims (3)

[Claims] 1. A method for sterilizing bacteria including Escherichia coli in a sand pit, wherein titanium oxide is mixed with particles formed by cement into particles in sand in the sand pit. How to sterilize a sandbox. 2. The sand according to claim 1, wherein said particles are formed in a size similar to that of sand particles. 3. A particle body, wherein the powder or particles of titanium oxide are formed by cement into particles having a size similar to that of sand particles.