CS Friends, As some of you may know I am in South Asia, working on a project to berin fabrication of CS saturated, pottery water purifiers, then get these into the poor communities that are vulnerable to diarhheal illnesses. In Nepal alone, 40,000 children die annually as a result of these illnesses. I'm writing because collaborators in Nicaragua are having a problem with chlorine in similar, CS saturated, earthenware water filters. It appears they are troubled with the possibility that chlorine put through the filters is deactivating the silver disinfectant. So they could not guarantee effective pathogen removal. I'm hoping someone on the list could suggest a methodology of determining whether or not this is a real issue for them.
For one thing it seems to me that whereas Ag+ in standing water may have a problem, that this could combine with chlorine and precipitate. (NB. their CS is much more concentrated than that used in so-called alternative medicine, 100 to 200ppm) But I'm inclined to think chlorine would not be a problem for that silver that is in the filters, that the silver present in the medium would be a compound like AgO. Wouldn't this be unreactive to chlorine, and remain situated within the filter medium? Otherwise I have suggested to them, off the top of my head, that they get an anaylitcal chemist to come up with a regime for tests for ppm and TDS, before and after filtering, using raw water of known ppm/ TDS. Or could they do this kind of work on their own, using a photo spectrometer? Or could they simply do periodic testing of filters used with chlorinated water, against filters that do not use chlorinated water? It seems to me that an analytical chemist could come up with some simple methodology for this, then assistants in the factory could run the tests. Can anyone add clarity? Thanks. Namaste, Reid -- 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]>
