Marshall; That is one form of it. Nevertheless, and however it is done, coal is often used to make activated carbon filters. I learned this when researching R.O. systems for home use. I have no info on a process to make activated charcoal, either "original genuine" or "new and improved" from coal or from coke; possibly a powdered material is compressed when damp and partially reduced under heat. The 'activation' part is simply an acid wash, increasing porosity by removing ash and cleansing bound carbon of contaminants. If you go to ebay and search for 'reverse osmosis h20 guru' you will find a brief mention in his sales blurb. He is a very knowledgeable and courteous professional. I also ran into this on another site selling GAC (granular activated carbon,) carbon block, and KDF (KDF fluid treatment co.; filter medium is a granulated alloy of very pure copper and zinc) filter cartridge elements among others. Granted; charcoal is a time honored descriptive noun, as well as a porous form of carbon. My statement stands.
Take care, Malcolm Marshall Dudley wrote: > Malcolm Stebbins wrote: > > > Many water filtration systems use commercially available charcoal filters; > > the > > best are supposed to be the carbon block style, and made from wood products > > rather > > than coal. > > As far as I know all charcoal is made from wood products. You cannot make > charcoal > from coal, if you try you end up with coke instead. > > Marshall > > -- > The silver-list is a moderated forum for discussion of colloidal silver. > > Instructions for unsubscribing may be found at: http://silverlist.org > > To post, address your message to: [email protected] > > Silver-list archive: http://escribe.com/health/thesilverlist/index.html > > List maintainer: Mike Devour <[email protected]>
