Manganese acqua minerale conc., Mg / L

Of this type of filters used them and everyone not drink usually have their opinion and assessment. Assessments vary over a very wide range, from the "good" or "very good" to "bad", "very bad", "bacteria farms. When these filters appeared in our stores, and my colleagues just acquaintances, who know that I am working acqua minerale with water, would ask my opinion about them. My answer was: I do not use them and therefore nothing about their good or bad sides of the properties can not say, just as I can not say it is worth or not worth to use.
Some of the issues I've had enough, and there is some free time, I decided to investigate these filters. acqua minerale And not just a taste of unfiltered and filtered acqua minerale water and solely taste buds decide which is tastier. As I mentioned earlier you introduce yourself, I am a professional chemist-analyst. So, perform unfiltered and filtered water chemical analysis was not difficult for me. A bit later, these studies in laboratory works in conjunction with the water continued specialization of undergraduate and graduate student. These studies were carried out even when the flats were no drinking water treatment plants and therefore consumers were supplied poor quality water.
Research methodology is simple: to Brita pitchers poured one liter of tap water (raw water) and the time period acqua minerale during which the water nusifiltruoja. At the same time, raw water total hardness were determined, such as iron and manganese acqua minerale concentrations. acqua minerale Filtered water was determined by the same quality indicators, ie, total hardness and iron and manganese concentrations. 2,3,4 liters of water then filtered and discarded, and a similar analysis is repeated filtration of 5-th, 10-th, etc. liters of water. acqua minerale The results shown in Table 1.
Analyzing Table 1. the results we can see that the increase acqua minerale nufiltruo volume of water per liter of water to be filtered more and more time (5th liter water filtravosi 4.25 min, the 100th has 12.95 min., and the 180-th even 31 minutes. Why is this so? Reason is very simple: pouring water into a pitcher it pritirpsta oxygen in the air and in the water-soluble green and therefore invisible to the divalent iron is oxidized by oxygen little soluble ferric hydroxide (rust). These rust builds up in the cartridge and so one liter of filtered water requires more and more time. However, this is not bad rust on the contrary, they act as a catalyst for iron oxidation with oxygen. acqua minerale The more tape accumulates rust, the better the water is removed from the iron.
With manganese different image. Manganese acqua minerale oxygen in the air when the water pH less than 12, oxidize, but filtered water at concentrations well below the green water. Very simple explanation: manganese participated in an exchange acqua minerale reaction with the cartridge inside the H-shaped cation exchanger. The same H-form cation exchanger removes the water and a part of the calcium and magnesium ions, thus reducing the water hardness; water becomes softer. We see (column 3), that the increase of the filtered water volume decreases in proportion to the water softening effect. However, the softening effect persists acqua minerale for long enough; filtration 180 liters of water, the hardness is still decreased by 10%. In summary it can be said that Brita cartridge significantly improves water quality.
Green water
5
2.2
0.29
0.03
12.85
0.50
0.15
160
One can ask: why study was only 180 liters of filtered water. The fact is that by filtering 182 th liter of water, the filtrate is cloudy and dyed brown color; cartridge accumulated acqua minerale rust got into filtered water. It's time to change the cartridge.
Later, with Brita cartridge similar studies have been conducted Petrašiūnai acqua minerale water site in Kaunas and Valkininkai (Varena district.). In these areas the tests were carried out so that the groundwater acqua minerale quality was very different from Antavilių groundwater quality. Petrašiūnai groundwater was relatively little iron, but a lot of manganese, and Valkininkai underground water was very high in iron and manganese number. These research results are presented in Tables 2-3.
Pure water total hardness, meq / L *
0.85
0,055
0.30
11.0
0,335
0.80
130
4.15
0.023
0.35
Manganese acqua minerale conc., Mg / L
.556
0.12
5.75
5.42
0.60
110
4.25
0,064
Similar studies have been carried out with the "Kenwood", "Standard", "AKVAFORS, acqua minerale ICE spring (Lithuanian) and BRITA evro" (Kaliningrad) production for domestic filters. At least some competition Brita filters can only conclude Kenwood filters, and through them, although it was possible to filter the water by about a third less than in the Brita filter. All other filters fall far short of these two. My guess is that other filter cartridges have been charged by poor quality (that's why cheap) cation exchanger. acqua minerale
The t