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Re: RO extraction
On Mon, 13 Sep 1999, Kevin Zippel wrote:
> "But, unfortunately, the standard R.O. membrane will not remove some
> nuisance chemicals like phosphate, nitrate & silicates. .... For this
> reason, you would need to use one of the R.O. units with a final stage
> deionization (DI) cartridge like the Maxxima series. The DI resin will
> remove any phophate, etc., that passes through the R.O. membrane."
> Is this just BS to sell another product? Kevin
I think that's BS. For two reasons. First, a normal RO membrane *does*
remove phosphates, nitrates and silicates. Second, silica in solution
usually carries no electrical charge, so a DI resin won't touch it.