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Is it good for Hanston front filter household water purifier? The price of the purchase performance is high.1. the structure of the water purifier is different, and the water purification effect is different.Generally speaking, the first-class filter water purifier is simple in structure, mainly activated carbon, and its filtration capacity is limited. it can only be used for coarse filtration. the filtered water is best heated and boiled for drinking.Most of the first-class filter water purifiers belong to low-grade water purification products, each selling price between more than a dozen yuan and 150 yuan.2. multi-stage filter water purifier.This water purifier has two levels of coarse filtration and a set of fine filtration, and the fine filtration is mostly made of hollow fiber filter elements. the filtered water can be directly drunk.The multi-stage filter water purifier belongs to the mid-range water purification products, each selling price is between 300 yuan and 500 yuan, which can be accep
Introduction to chemistry 1. water is widely distributed on the Earth,Rivers, lakes and oceans account for about 3/4 of the Earth's surface area,The water content of human body accounts for about 2/3 of human body quality.But there are not enough fresh water resources,The amount of ground fresh water is less than 1% of the total water,And the distribution is very uneven.2. the pollution of water comes from the waste residue, waste water and waste gas in the factory production,(2) Arbitrary discharge of domestic sewage,(3) pesticides and fertilizers used in agricultural production flow into the river with rain.3. prevent and eliminate pollution to water sources,To protect and improve water quality,Measures to be taken: 1 strengthen the monitoring of water quali
