Talk about why water purifiers use activated carbon filter?

Why do water purifiers use activated carbon filters? In the water quality pretreatment system, the activated carbon filter can absorb the residual chlorine that cannot be removed in the previous stage filtration to prevent the reverse osmosis membrane of the subsequent stage from being oxidatively degraded. Water odor, colloids, pigments, heavy metal ions, etc. have obvious adsorption and removal effects, and also have the effect of reducing COD. The SDI value of RO influent can be further reduced to ensure SDI<5 and TOC<2.0ppm. Why do water purifiers use activated carbon filters? The current household water purifiers are all filtration technology, and the filtration technology should follow the order of filter holes from large to small. Only when activated carbon is used as a filter material, it also has the function of adsorption, which can remove the color, odor, residual chlorine, some organic matter and adsorb some trace heavy metals in the water. Especially for non-reverse osmosis water purifiers (known as general water purifiers in the country), activated carbon is an important means of adsorbing harmful organic matter, so activated carbon filter elements are essential in water purifiers, and other filter elements cannot be replaced. For the RO process, because the residual chlorine has a greater impact on the RO membrane, it will lead to a decrease in the desalination rate. Activated carbon is required for pretreatment to protect the RO membrane and prolong the service life. It can be seen that the front activated carbon filter element of the reverse osmosis water purifier (ie RO) is standard. 1. Why do water purifiers use activated carbon filters? The adsorption of heavy metals by activated carbon is species-selective, that is, it cannot adsorb all heavy metals: its removal is also trace, so activated carbon is not a reliable means of removing heavy metals. Even modified activated carbon (for a certain metal, special adsorbent chelating agent is added to the activated carbon), it is only for a certain metal (for example, Amway, which has a strong research and development skills in activated carbon technology, only promotes Hg and Pb have very good effects, but the purification performance of arsenic and arsenic is not perfect), and the five highly toxic heavy metals that are harmful to the human body cannot be removed at the same time. Because the heavy metal content in the effluent of water plants is basically very low, some manufacturers are playing the edge ball and promoting exaggerated functions. This has been exposed (such as 3M), so don't be misled; 2. Why do water purifiers use activated carbon filters? In China, due to serious industrial pollution, the removal of TOC is very important. There is no water purifier with RO process. The choice of activated carbon filter is one of the key factors to determine the effect of TOC removal. 3. Why do water purifiers use activated carbon filter elements? For southern my country, the hardness is not high, but the economy is developed, the industrial pollution is higher, and the residual chlorine is higher. Therefore, Jiahuan Evaluation reminds everyone to choose the pre-activated carbon with a higher adsorption value or more quantity. For areas with high hardness, it is better to add a first-level anti-scale or softened filter element. 4. Why do water purifiers use activated carbon filters? At present, Dow reverse osmosis elements widely used are mostly low-pressure polyamide membranes, which are not resistant to chlorine in use, especially under the action of heavy metal ions, they are easily oxidized and cause permanent damage. Tap water contains many heavy metal ions, which can easily damage the membrane after the activated carbon fails. The content of residual chlorine and organic matter in tap water varies, and it is not enough to replace activated carbon rods only by calculation and estimation. 5. Why do water purifiers use activated carbon filter elements? For activated carbon filter elements, adsorption requires a certain contact time, and the water flow rate cannot be too fast. According to the standard JB/T2932-1999 'Technical Conditions for Water Treatment Equipment': To remove free chlorine in water, the water flow rate must be ≤20m/h, and to remove organic matter in the water, the water flow rate must be ≤10m/h. For more filter information, please visit the official website of Guangzhou Guangzhou activated carbon filter manufacturer
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