How to select the water purification equipment for pre-filtration, ultra-filtration and RO? It is recommended to use a soft machine to reduce the scale, and the softening resin in the soft machine is used to reduce the hardness of the water. At the same time, it depends on the needs of users. if you simply rely on a soft water machine, you can't reach the direct drinking standard.
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Preparation of artificial seawater of different concentrations Artificial seawater is prepared close to the ion composition, osmosis pressure and pH like seawater,There are recipes such as Herbst and Vant Hoff.Because the seawater pressure can vary from region to region (the pressure on the Mediterranean coast is higher than that on the Japan Pacific Coast and the United States Atlantic coast ),Therefore, artificial seawater should also use different penetration concentrations according to the region.When preparing artificial seawater,It is usually first made into a solution of NaCl, potassium chloride, CaCl 2, MgSO 4 (MgCl 2) with penetration concentration such as seawater,Then mix these solutions according to the appropriate dissolution ratio,Then change the mixing ratio,Assuming that a certain score is removed,It can be used to study the physiological effects of specific metal ions in seawater.Step one,Just put the water,If there is no old water (after drying the water to remove chlorine ),Tap water is als