It was open stage night in rec.food.drink.tea, when crymad stepped
up to the microphone and muttered:



Derek wrote:

It was open stage night in rec.food.drink.tea, when crymad
stepped up to the microphone and muttered:

Don't Brita filters remove chlorine themselves?

Their packaging says they do. But I'm not certain about the
chemistry involved. Anyone here with expertise on the
matter?

Activated carbon filters remove a lot of stuff. Pur filters
don't claim to remove ALL chlorine, just reduce it in the
water. Brita is probably the same.

The following is from an aquarists' site regarding the use of
activated carbon in aquariums.

"A particle of activated carbon is mostly air. It has thousands
of tiny holes and crevices through which water can circulate.
When water carries an organic molecule – a contaminant – into
these narrow passages a short range attractive force between
the molecule and the carbon will become effective and the
molecule sticks. This particular method is called physical
adsorption. The other kinds of adsorption also involved with
activated carbon are of only minor importance to the aquarium."

Is it safe to say that chlorine is absorbed the same way?

Yep.

If so, then our method of removing the chlorine in water by
letting it sit out before transferring to the Brita pitcher
would seem to account for the extended lifespan of the filters.

More than likely. The less stuff you have in the water to "plug the
holes" the longer your filter will last.

Derek

--

It's not "free" speech when I have to pay for the privilege of
listening to a message that I don't want to hear.