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Hear Hear! It's the French influence of course.
There was once an advert for spring water (possibly Evian) saying that it was filtered for 10,000 years through volcanic / alluvial / whatever rock, so it must be safe to drink.
Sell-by date 3 months hence.
Purveyors of bottled water have been pandering to the whims of ignorant buyers for years, so as long as people are stupid enough to buy bottled water, no wonder that the sellers are rubbing their hands with glee (and cash).
Hey ho.
I was drinking a bottled water when I read/posted this... :facepalm1: :lol8:
It's amazing how much people spend on water! In my chevron - bottled water makes us the most money. We sell so much of it!
Really? Wow!Quote:
Originally Posted by tanya
It is convenient. I've got my little fridge stocked full of it here at work.
You guys worried about floride in the drinking water? been thinking about one of those expensive filtering systems.
No; the positives of floride far outweigh any negatives.Quote:
You guys worried about floride in the drinking water?
Water filters are fine, but do not use water softeners. Soft water is actually far less healthy for you and soft water systems (especially the ones sold by someone that comes to your house and "tests" your water) are basicially a scam. Soft water is actually good for washing, but drinking only soft water can have health consequences.Quote:
been thinking about one of those expensive filtering systems
I bought one of these Camelbak filtered water bottles to use at the office because the water didn't taste good out of the tap. The bottle does the trick and I use it every day. http://www.amazon.com/Camelbak-Groov...k+water+bottle
NM too off topic...
Not so. Organic acids demineralize your enamel on your teeth. When floride is present in saliva, it remineralizes the enamel. Having it in your saliva also helps prevent gum disease which is actually linked directly to heart disease.Quote:
I understand it prevents tooth decay for use topically only.
Floride also strengthens bone structure in children, but unlike many other substances is not essential to the body.Quote:
I've yet to hear one shred of evidence that ingesting it is good in any way shape or form.
It is true than when ingested in large amounts, that floride is toxic. Same with several other minerals. Selenium for example, is present in vitamins and suppliments, but it is toxic in high doses. When working for a gold refinery, I tested high in selenium and had to take precautionary actions.
Edit: Oops, I just saw the NM.
Dammit you beat my edit! Alright I take your word for it then. :2thumbs:
That's pretty true of anything, even water can be toxic in very high doses :)Quote:
Originally Posted by Scott P
What gets me is water companies throwing around terms like "reverse osmosis". What a crock, anyone who knows anything, especially biology or chemistry knows that that is just a fancy word for FILTRATION. Haha! Duped!
I have reverse osmosis in my house. That even removes the fluoride.
That's not correct, although I have to admit I had to look it up in Wikipedia to make sure. They are different. Filtration involves removal of solids from (usually) liquids by physical methods (size exclusion). Reverse osmosis removes some solids, but also removes dissovled materials from solution. From Wikipedia:Quote:
Originally Posted by Bootboy
Quote:
Filtration is commonly the mechanical or physical operation which is used for the separation of solids from fluids (liquids or gases) by interposing a medium through which only the fluid can pass. Oversize solids in the fluid are retained, but the separation is not complete; solids will be contaminated with some fluid and filtrate will contain fine particles (depending on the pore size and filter thickness). Filtration is also used to describe some biological processes, especially in water treatment and sewage treatment in which undesirable constituents are removed by adsorption into a biological film grown on or in the filter medium.
Quote:
Reverse osmosis (RO) is a membrane-technology filtration method that removes many types of large molecules and ions from solutions by applying pressure to the solution when it is on one side of a selective membrane. The result is that the solute is retained on the pressurized side of the membrane and the pure solvent is allowed to pass to the other side. To be "selective," this membrane should not allow large molecules or ions through the pores (holes), but should allow smaller components of the solution (such as the solvent) to pass freely.
In the normal osmosis process, the solvent naturally moves from an area of low solute concentration (High Water Potential), through a membrane, to an area of high solute concentration (Low Water Potential). The movement of a pure solvent to equalize solute concentrations on each side of a membrane generates osmotic pressure. Applying an external pressure to reverse the natural flow of pure solvent, thus, is reverse osmosis. The process is similar to other membrane technology applications. However, there are key differences between reverse osmosis and filtration. The predominant removal mechanism in membrane filtration is straining, or size exclusion, so the process can theoretically achieve perfect exclusion of particles regardless of operational parameters such as influent pressure and concentration. Reverse osmosis, however, involves a diffusive mechanism so that separation efficiency is dependent on solute concentration, pressure, and water flux rate.
I know there are subtle differences but reverse osmosis is a type of filtration. Positive pressure on one side of a selective membrane.
I almost always drink bottled water, only I make sure purchase brands that are fortified with nutrient rich additives like Barley, Hops, Wheat, and other wonderful things my body needs every day.:naughty:
The difference is not that subtle, at least not to me. Yes, they both involve some kind of membrane, but filtration removes solids from either a liquid or a gas, and the removal is done by using a membrane with holes small enough to catch the solid material, while the liquid flows on through. Filtration only works when what you are trying to separate are different phases (and I think one has to be solid). Reverse osmosis involves diffusion, and works at a molecular level. So for example, you can filter sand out of water, but not dissolved salt.
Quote:
However, there are key differences between reverse osmosis and filtration. The predominant removal mechanism in membrane filtration is straining, or size exclusion, so the process can theoretically achieve perfect exclusion of particles regardless of operational parameters such as influent pressure and concentration. Reverse osmosis, however, involves a diffusive mechanism so that separation efficiency is dependent on solute concentration, pressure, and water flux rate.
I used to drink bottled water, especially after I gave up drinking diet sodas like they were going out of style, and because the tap water in various places I've lived (SF and Flagstaff) was awful.
I noticed when we were in Zion a couple of weeks ago that they had a sign up that they don't sell bottled water at all within the park, precisely because of the waste the plastic generates.
I read this thread while drinking filtered tap water from my adult sippy cup :mrgreen:, so you're preaching to the choir here :2thumbs:.
I use to work for a water company in Southern Utah called Kolob Water Company, They actually collect water from a spring on Cedar Mountain and truck it down to their facility in Cedar City. The spring gets tested weekly to make sure the water is still good. They filter the water once at the spring, once out of the truck, and twice before before it goes into a bottle (one of which is a laser filter).
The water is kept cool all the time and also kept on O3 (ozone) which prevents bacteria growth.
I usually drink tap water but I must say the water from this place is pretty freaking delicious.