Mencius:. "! Fish, my objectives; bears paw, but also my objectives two can not have both, take care of fish and bears paw were also."
the final outcome? As we all know, Mencius is the care of fish and bears paw. The so-called two evils choose the light, benefits both the minimum when weight, nothing wrong!
water and calcium, magnesium and the like "good" minerals, but also lead, cadmium, arsenic, "harmful" heavy metals. Remember Oh, these heavy metals actually minerals Kazakhstan, but nothing more harmful to human health, do not mistake minerals are "good class", there are many minerals in the family of "scum."
So the question is, do you want to retain the minerals in the water but also retains the heavy metals in water? Or you want to safe drinking water? Safe drinking water is both heavy metals in addition to water, but also to water, calcium, magnesium and other minerals besides.
Some people might say, "I only want to remove heavy metals in water of lead, cadmium, arsenic, etc., want to retain the water, calcium, magnesium and other minerals." Your idea is perfect, but also very naive, very cute, but it was virtually unattainable. Like "it is necessary to run the horse, but also horse can not eat," the results are the same as clatter. Even if you are not riding drive a car, it would have to burn oil costs of electricity na, how can there be so good thing best of both worlds, illegal objective laws of thing!
removing heavy metal ions, there are a variety of methods, such as distillation, reverse osmosis, nanofiltration, electrodialysis, power adsorption, ion exchange, etc., but no matter what kind, the removal of lead, cadmium, arsenic and other heavy metal ions simultaneously, will calcium, magnesium and other minerals also removes plasma oh together.
studied chemistry knows, RO membrane process such as reverse osmosis, nanofiltration of NF, electrodialysis, and ion exchange, whichever purifying filter technology, is first removed trivalent ions in the water such as ferric iron, aluminum and other ions, divalent ions and include calcium, magnesium, lead, cadmium, manganese, and ferrous ions, and finally the removal of monovalent ions including potassium and sodium ions. Everyone knows, Nanofiltration membrane separation technology is interposed between the reverse osmosis membranes and ultrafiltration membranes, nanofiltration retentate can be multivalent ions and organic matter, allowing monovalent ions.
Therefore, if you want to keep the mineral part of nanofiltration water, it retains what is it? It certainly is a monovalent ion! Since other monovalent ions in the drinking water or tap waterRarely, so reservations are sodium chloride, which is table salt. This is not to be a low-salt diet? We have to put less salt when cooking, salt and more susceptible to high blood pressure, hypertension, of course not good, then you have to water retention sodium chloride sense? Why did not you tell consumers plainly, I reserve is sodium chloride, rather than general minerals, but not what you want calcium and magnesium and other "good" minerals it!
In particular nanofiltration membrane, which is a separation membrane. However, nanofiltration is a monovalent ions and divalent trivalent ions in the water separation, i.e. retention of monovalent ions in the water, removing the divalent trivalent ion (sodium retention, removal of calcium, magnesium, lead, cadmium, manganese , iron, etc.), rather than for human identification and isolation of "good" and "bad" ion, it can not retain the "good" ions, to remove "harmful" ionic in water, nanofiltration can no AI artificial Intelligence screening skills Oh! Many times businesses just bragging and flicker nothing!
0.001 micron pore size nanofiltration membrane, possible filter material is smaller than the aperture itself. Filtering ions so nanofiltration could not smaller diameter heavy metal ions, e.g., divalent lead ions diameter of 0.000155 m, divalent mercury ion 0.000204 microns in diameter. However, only 0.0001 micron pore RO reverse osmosis membrane pore diameter is much smaller proportion of metal ions, these metal ions can be effectively filtered.
So, you see, though RO reverse osmosis water purifier ultrafiltration water purifier has long been attacking the camp, said no nutrition, but in recent years, but the decline ultrafiltration camp, do ultrafiltration water purifier have switcheds reverse osmosis water purifier. In recent years, it began to attack the camp nanofiltration water purification reverse osmosis water purifier, but the problem is that neither the PRC, research institutions, or Orville consulting, statistical data show the reverse osmosis increasing market share, already it has more than 70% market share!
(Source: Modern Financial Network)
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