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Re: Kold Steril (was APD V4 #351
I honestly don't know what to make of your answer: After quoting a bunch
of numbers, you still don't cite the number of interest: HOW MUCH of the
several heavy metals is removed at the beginning of a column's life and
HOW MUCH is removed after, say, 5,000 gal. (the volume you quoted as the
capacity of the system) -- at ANY beginning concentration. Also, most of
us don't have the luxury of having in our water supply only ONE heavy
metal present at a time -- unfortunately, we live in a world of
I DID go to the manufacturer's site and nowhere is there ANY data given
that could give one a hint as to the efficacy or capacity of the system.
A lot of numbers are there, to impress the novice, but without any hard
data in reference to effluent volumes. One wonders WHY! The experimental
details do not even state what type of water was used in the trials --
spiked distilled water or one of 300 ppm hardness?
I agree that it is pointless to continue this discussion.
> Date: Mon, 19 Jun 2000 17:27:43 -0400
> From: "Monolith Marine Monsters \(m3\)" <puffie at marine-monsters_com>
> Subject: Re: Kold Steril (was APD V4 #351
> >Date: Sat, 17 Jun 2000 22:56:02 +0000
> >From: George Slusarczuk <yurko at warwick_net>
> >Subject: Re: Kold Steril (was APD V4 #351
> >Hello Edward,
> <text deleted>
> >You did not, however, give the metal concentration specifications for
> >the starting water, nor for the effluent, and that is crucial.
> >What will be the concentration of the six metals (advertised as being
> >removed) in the FIRST 10 gal of the effluent, as well as in the LAST 10
> >gal, (i.e. in the 0-10 gal. & 4990-5000 gal. fraction of the effluent)
> >starting, say, with a 0.1 ppm concentration of each metal in the
> >starting raw water.
> >That would give one a feeling for both the efficacy and capacity of the
> >system. For some reason these figures are not provided on the website.
> Hello George,
> First of all the Kold Ster-il (r) is designed to filter potable
> water . Your question eliminates any potable water filter because your
> situation is totally nonpotable water.
> Under US EPA Standards : Maximum allowable concentrations of these
> contaminates: Lead 0.015mg/L , Mercury 0.002mg/L , Cadmium
> 0.005mg/L . Your question invents a situation where a constant
> 0.100 mg/L of each metal is to be tested. You need to visit the
> manufacturer's website and then ask them the question again. In
> challege under ANSI/NSF Standards 53,53b for heavy metals , filter
> media are subjected to 0.150 mg/L concentration of each of the
> three metals i.e. Lead, Mercury, Cadmium. Kold Ster-il's last canister
> will sorb 1500 gallons of the three heavy metals at a 0.150 mg/L
> or 150 part-per-billion x 3 or 450 part-per-billion.
> The first stage medium will sorb 0.150 mg/L of the three metals
> for 2500 gallons. So the Kold Ster-il (r) is capable
> of stripping thousands of times the legal (potable water
> concentration) of heavy metals for 4,000 gallon of water. The other
> three heavy metals copper, iron and zinc are also listed on the
> U.S EPA Standards Copper 1.0mg/L , Iron 0.30mg/L, Zinc
> 5.00mg/L. Obviously the copper and zinc concentrations allowable in
> drinking water would kill fish & invertebrates. Our system provides
> under 0.100 mg/L concentration for 5000 gallons. You cannot test
> all six metals at the same time because of the synergistic
> reactions involved --- the manufacturer tested the three low
> concentration metals (lead, mercury & cadmium) together in feshwater &
> They next tested the three high metals (iron,copper & zinc) together in
> both freshwater and saline. The results are posted on their website.
> The tests were performed in US Medical School 's Dept. of
> Toxicology under US EPA Standards.
> Any further questions on this thread will be done in private email. Email
> me at puffie at marine-monsters_com