Can the radioactive substance be removed with the reverse osmotic membrane softeners and purifiers?

There was a radiation leak accident in the first nuclear plant in Fukushima Japan in March, 2011. A radioactive iodine in the filtration plant of the Tokyo waterworks bureau was detected in density 210Bq/kg. Can the radioactive substance included in tap water be removed with softeners and purifiers?

What is the reverse osmotic membrane?

The reverse osmotic membrane is a film where water doesn't pass impurities other than the water such as it is possible the expert to become empty, ions, and salts. The size of the hole is about 0.0005 microns (0.5 nm, nanometer).

Can a radioactive iodine in water be removed with the reverse osmotic membrane softeners and purifiers?

Can the softeners and purifiers made by the reverse osmotic membrane method set up in the supermarket etc. remove the radioactive substance?Can the particle of iodine 131 and cesium 137 be removed though the softeners and purifiers of the reverse osmotic membrane filtration method can make seawater a fresh water?

The hole of the filter of the reverse osmotic membrane softeners and purifiers is about 0.0005-micron (0.5nm), and molecules of water are 0.0003 microns about (0.3nm). Therefore, all things that are larger than the molecule of water can be removed.

The grain diameter of a radioactive iodine and the cesium seeming is about 0.01-10 microns in the size. (There is information of about 0.001 microns though it is a particle of submicron of about about generally 0.1μm, too.)

The cesium is a water solubility though the iodine doesn't melt easily to water. Therefore, it is thought that it is possible to filter and to remove the iodine of the radioactivity with the reverse osmotic membrane though the cesium might be impossible.

There is the one called that the size of fine pores of the reverse osmotic membrane is 0.0001 microns (0.1nm), too. When it is this, the molecule of water cannot be passed. The molecule and the atom of the material always vibrate, and the one of such a size cannot measure the size accurately. Apparently, the size of the hole of the reverse osmotic membrane seems to be a value of presumption.

It is not a translation that experiments whether the radioactive substance in water can be removed with the reverse osmotic membrane softeners and purifiers. It doesn't go out of the region of the guess to the last. Self-responsibility of judgment, please.

For the softeners and purifiers of the hollow fiber film method

The hollow fiber film is the one originally developed for the hemodialysis such as kidney machines. The hollow fiber film is a filamentous fiber whose macaroni center is a midair. The pore of the diameter of about 0.1 microns is innumerably open on the surface. In general, because the size of the bacillus is the number of microns one-level, the bacillus can be removed. However, it is thought that the one of some size can be removed though the radioactive substance such as iodines and cesiums cannot be completely removed.

For usual activated carbon type softeners and purifiers

The granular activated carbon is used for usual activated carbon type softeners and purifiers. A detailed hole of 0.5-5 microns has innumerably become empty on the surface of the activated carbon, and the molecule is taken and the smell and dirt have been removed in that.

As for the surface area of the activated carbon of 1g, it becomes about as much as 1000 square meters, and the surface area is very large. A radioactive iodine and the cesium are thought not to be able to remove it so much to some degree though will be able to remove.

Destination of radioactivity material taken into the inside of the body and the influence

The radioactive substance taken into the inside of the body includes cesium 137 etc. to stay in radiation iodine 131 and the muscle that gathers in the thyroid. The radioactive substance collapses in the time passage and the number of radioactivities decreases. It is about 30 years in cesium 137 of about eight days in radioactive iodine 131 the half - life.

Moreover, such a radioactivity material is gradually exhausted from the inside of the body as excreta etc.It is about 100-200 for cesium 137.

The probability of occurrence of the thyroid cancer with radiation iodine 131 that gathers in the thyroid is different in the age at the exposure. It is understood not to increase so much at the age of 40 or more though it increases especially in baby's exposure.

It is effective only to draw and to put water.

It is effective only to draw and to put water because the half - life of radioactive iodine 131 is about eight days. For instance, the radioactivity becomes about 1/4 if it draws on the 16th and it puts it. It is not effective because the half - life is about 30 years in cesium 137.

Please add on the way and sterilize the hypochlorite of a high clone etc. when tap water is drawn and it puts it. Please boil before using water and use it.