At present, water purifier products on the market mainly include membrane technology, ceramic filter core technology, activated carbon technology and other three technologies. Membrane technology water purifiers are further divided into four categories: microfiltration, ultrafiltration, nanofiltration and reverse osmosis. Meanwhile, "micro-filtration", "ultrafiltration" and "ceramic filter core" technologies cannot filter out subtle pollutants, while "nanofiltration" and "reverse osmosis" can produce pure water, but consume water and electricity seriously, especially filter out all kinds of minerals necessary for human body. For example, the daily intake of calcium from the human body from the water to 80mg, use "reverse osmosis" water purification products needs to pay attention to calcium supplement.
Activated carbon adsorption technology is the earliest and most mature water purification technology, which has been widely used by mainstream water purifier manufacturers at home and abroad. Of course, the market to choose the activated carbon technology of water purifier, the product quality is also intermingled, choose to pay attention to the comparison of its activated carbon raw material, density, adsorption area and other indicators. Coconut shell activated carbon, developed pore structure, large surface area, strong adsorption function, is an excellent adsorption material, in the removal of these pollutants at the same time, can preserve the water essential calcium, magnesium and other minerals. In addition, specially treated activated carbon can also remove heavy metals such as lead and mercury.
However, nitrite content in water treated with activated carbon technology will increase slightly, but its content is far lower than the national regulation of 1mg/L. The nitrite content in the activated carbon filter water consumed per person per day is only a few hundredths of the normal daily intake, which is completely negligible. In addition, activated carbon cannot remove pathogenic microorganisms in water, while ultraviolet radiation has a wide range of killing bacteria and viruses, and does not produce by-products. Therefore, consumers can choose water purification products combining activated carbon and ultraviolet radiation.
Water purifier selection tips
According to the survey, although the penetration rate of household water purifiers in China is only 2%, but the brand has reached more than 4,000 kinds. How to choose without being confused?
According to industry experts, what other details should consumers pay attention to when choosing water purification products besides water treatment technology? The first, whether the product obtains world authoritative organization attestation. When selecting a water purifier, it should not only look at whether it is certified, but also look at which specifications it has been certified. Second, whether the product is equipped with intelligent tips for filter screen replacement. Whether it is membrane technology or activated carbon technology, there are clear provisions for the service life, the use of the extended period can not ensure the safety of filtered water. Third, whether the product meets the safety requirements in the process of use. Such as water and electricity separation design, can effectively reduce product safety risk.