Classification of household water purifier treatment methods

Household water purifiers can be divided into the following categories according to water quality treatment methods: 1. Mineralization method refers to adding mineral elements (such as calcium, zinc, strontium and other elements) that are beneficial to the human body on the basis of purification. Its purpose It is to play the role of health care of mineral water. Commercial water purifiers generally achieve the purpose of mineralization by adding medical stone to the water purifier, but the effect of artificial mineralization is still a controversial issue. 2. Activated carbon adsorption It is more commonly used, and it is mostly made of carbonaceous substances such as essence, coal, nut shell (core), etc. by chemical method or physical activation method. It has a lot of micropores and specific surface area, so it has a strong adsorption capacity and can effectively adsorb organic pollutants in water. In addition, during the activation process, some oxygen-containing functional groups are formed on the amorphous part of the surface of the activated carbon filter element. These groups enable the activated carbon to have chemical adsorption, catalytic oxidation and reduction properties, and can effectively remove some metal ions in water. 3. Magnetization method refers to the use of magnetic field effect to treat water, which is called magnetization of water. The process of magnetization is that after water passes through the magnet in the direction perpendicular to the magnetic field lines, the magnetization process is completed. The magnetization treatment of water in my country is still in the primary stage of practice and research so far. Foreign water purifiers do not have the requirement of magnetization function, because magnetized water does not belong to the scope of water purification, but belongs to medical problems. 4. Microfiltration and ultrafiltration Microfiltration is a microporous membrane made of cellulose or polymer materials, and its uniform pore size is used to retain particles, bacteria, colloids, etc. in the water, so that they can be removed without passing through the membrane. . This microporous membrane filtration technology, also known as particle density filtration technology, can filter micron or nanometer particles and bacteria. 5. The pure water produced by RO reverse osmosis membrane RO reverse osmosis water purifier is fresher, more hygienic and safer than bottled water. It has a wide range of uses: it can be drunk raw or boiled, which is outstanding in this regard The characteristic is that the kettle or electric thermos will no longer be scaled; pure water is used for cooking, which is more hygienic and more delicious. 6. Boiling method refers to drinking tap water after boiling, which is an ancient method and is widely used in China. Boiling water kills bacteria, but cannot remove some chemicals and heavy metals, even in extremely low levels, so it is still unsafe to drink. 7. Composite type When one process is difficult to remove harmful substances in water, two or more processes are used to form a composite type. Such as activated carbon adsorption plus ultraviolet sterilization, activated carbon adsorption plus reverse osmosis, activated carbon adsorption plus microfiltration (ultrafiltration), polypropylene microfiber plus activated carbon plus microfiltration (ultrafiltration), etc. 8. The softening method refers to the water that removes or reduces the hardness of the water (mainly calcium and magnesium ions in the water) to a certain degree. In the process of softening water, it only softens the water quality, but cannot improve the water quality.

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