Is it healthy to drink filtered tap water for a long time

Liu Wenjun, a professor at Tsinghua University Environmental Research Institute, told CCTV that the water purifiers on the market mainly include activated carbon technology, membrane technology and ceramic filtration technology. Membrane technology water purifiers on the market are divided into four categories: microfiltration, ultrafiltration, nanofiltration and reverse osmosis. Among them, microfiltration and ultrafiltration can only remove large particles, while nanofiltration and reverse osmosis can filter out beneficial substances in water, such as sulfate, calcium and magnesium ions. Calcium and magnesium ions are good for cardiovascular diseases. If calcium and magnesium ions are low, the incidence of cardiovascular diseases will increase. Long-term drinking is harmful to health.

In addition to membrane technology, ceramic filtration technology is also widely used in the market. It has anti-corrosion and oxidation effects, but its effect on trace organic matter is limited.

Liu Wenjun told reporters that activated carbon technology is now highly valued. It can remove a large number of trace organic substances and heavy metals harmful to human body, and the safety of water quality is obviously improved, but it can not remove pathogenic microorganisms.

Huang, a professor at the School of Chemical Engineering of Xinjiang University, said that various technologies have their own advantages and disadvantages, and ordinary people had better choose products that comprehensively utilize activated carbon technology and ultraviolet technology. "Ultraviolet technology, physical technology, does not produce by-products, has a spectral disinfection effect, and has a good effect on cryptosporidium and Giardia. Therefore, the combination of these two technologies can not only remove trace organic matter and heavy metals harmful to human body, but also retain trace elements beneficial to human body. "

It can be seen that all kinds of water purifiers on the market have their own advantages and disadvantages. If the choice is not good, it is really harmful to people's health. Experts suggest that consumers with high water quality requirements should try to choose water purifier products with activated carbon technology and ultraviolet technology.