tag:blogger.com,1999:blog-2807403883562053852.post779241923440875989..comments2024-03-27T08:40:31.785-06:00Comments on Clayton Cramer.: Today's Silly QuestionClayton Cramerhttp://www.blogger.com/profile/03258083387204776812noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-2807403883562053852.post-49498433958112962912015-11-19T18:15:57.866-07:002015-11-19T18:15:57.866-07:00The Russians are not the only ones who use ozone i...The Russians are not the only ones who use ozone in water treatment, both potable and sewage. There are many cities here in the US that use ozone, Ann Arbor Mi. Is one of the larger water treatment that uses ozone. <br />Many of those that do use ozone also add chlorine to prevent contamination from reoccurring after ozone treatment. <br />Ozone requires a high level corrosion proof piping to maintain system integrity. This adds a cost that precludes many systems from employing using ozone. <br />If you ever tour a water plant that is using ozone you will see much of the piping is stainless steel vs. galvanized or plastic where chlorine is the primary disinfectant. jon spencerhttps://www.blogger.com/profile/10886632644249920124noreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-72003711703483394982015-11-19T15:52:25.495-07:002015-11-19T15:52:25.495-07:00Nosmo King: The Russians use ozone instead of chlo...Nosmo King: The Russians use ozone instead of chlorine.Clayton Cramerhttps://www.blogger.com/profile/03258083387204776812noreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-32422755979698515922015-11-19T14:29:08.841-07:002015-11-19T14:29:08.841-07:00http://www.scientificamerican.com/article/how-does...http://www.scientificamerican.com/article/how-does-chlorine-added-t/Punzdeleonhttps://www.blogger.com/profile/11403228190896440245noreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-34355571330190515152015-11-19T14:14:23.495-07:002015-11-19T14:14:23.495-07:00I've been exposed to a fair amount of chlorine...I've been exposed to a fair amount of chlorine chemistry at work.<br /><br />Chlorine in water forms hypochlorous acid -- HOCl -- which is just itching to dump the oxygen and become HCl. (Bleach, containing sodium hypochlorite or NaOCl, does much the same thing, producing NaCl.) <br /><br />The fraction of chlorine that is hypochlorous acid vs. the fraction that is hydrochloric acid depends on the pH of the water, so when we're monitoring the water, we're looking at chlorine level, pH and temperature to calculate contact times.<br /><br />Nowadays, a lot of water systems use monochloramine -- NH2Cl -- which is a weaker disinfectant. The chlorine is more tightly attached to the nitrogen, and less reactive, but when it detaches, it does the same thing that chlorine gas does in water, leaving the resulting ammonium ion to find a stray hydrogen ion.Karlhttps://www.blogger.com/profile/09767954910569442805noreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-66557285707376290162015-11-19T08:33:33.790-07:002015-11-19T08:33:33.790-07:00This might help: http://humantouchofchemistry.com/...This might help: http://humantouchofchemistry.com/why-is-chlorine-added-to-swimming-pools.htmButch Howardhttps://www.blogger.com/profile/06159535335523677630noreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-17038772099377117692015-11-19T03:00:18.046-07:002015-11-19T03:00:18.046-07:00If I may add to the question: If oxygen is the bac...If I may add to the question: If oxygen is the bacteriacide, could water purification be successfully accomplished by aerating water? If so, aerating to what degree? And, what is the minimum percentage of oxygen in the aerating gas necessary to accomplish successful destruction of bacteria? How successful would this process be, e.g., what percentage of bacteria wuld be destroyed?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-37100327669455682582015-11-18T23:07:10.658-07:002015-11-18T23:07:10.658-07:00Chlorine in water is in equilibrium with chloride ...Chlorine in water is in equilibrium with chloride anion and hypochlorite. This "breaks up the water molecule" but in such a way that the chlorine atom has a partial positive charge and the oxygen has a negative one - as you would expect from the relative electronegativeities. But when hypochlorite oxidizes organic material, it does so in a way that leaves the oxygen bound to the organic material, because that is what's thermodynamically favored - carbon-oxygen bonds are stronger than carbon-chlorine. ErolB1https://www.blogger.com/profile/12127872427773090283noreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-4297478925952892702015-11-18T19:17:08.996-07:002015-11-18T19:17:08.996-07:002Cl2 + 2H2O => 4HCl + O2
Sorry no subscripts.
...2Cl2 + 2H2O => 4HCl + O2<br /><br />Sorry no subscripts.<br /><br />JLW IIIJLW IIIhttps://www.blogger.com/profile/06058544501109588908noreply@blogger.com