64 pages for “cat=approfondimenti&q=q%3DpH”
… into hypochlorous acid and hypochlorite ion, in proportions that depend on pH. Hypochlorous acid is the form with the highest and fastest disinfecting power and prevails the closer the pH is to 7; the hypochlorite ion has a considerably lower oxidising power a …
Also in: Why control pH · How pH is measured · pH control systems
… perform best and chlorine achieves its maximum disinfecting effectiveness. pH below 7.2 Attack on metal materials and irritation of bathers’ eyes and mucous membranes. pH above 7.4 Chlorine is converted into hypochlorite ion, which has little disinfecting powe …
Also in: Chlorine and pH · Disinfection and pH control · How much chlorine actually disinfects · Sodium hypochlorite
… perform best and chlorine achieves its maximum disinfecting effectiveness. pH below 7.2 Attack on metal materials and irritation of bathers’ eyes and mucous membranes. pH above 7.4 Chlorine is converted into hypochlorite ion, which has little disinfecting powe …
Also in: Chlorine and pH · How much chlorine actually disinfects · Sodium hypochlorite · The Redox potential of water and its variations
The disinfecting efficacy of chlorine depends on the pH of the water: as the pH rises, a greater quantity of chlorine is needed to inactivate the same quantity of microorganisms. Drinking water may have a pH between 6.5 and 9.5: for the same measured free chlo …
Also in: Why the DPD method and the closed cell give different values · The Redox potential in drinking water · The limitations of the DPD method · Summary table
Drinking water Regulating pH pH electrode Measurement problems Insight → Drinking water Well water Analysis and disinfection Chlorine measurement Systems Insight → Swimming pools Private swimming pools pH and disinfectants Redox, cells and DPD Insight → Swimmi …
… it is the most suitable disinfectant against Legionella. Independent of pH Effective between pH 4 and 10, with no loss of effectiveness; its action is not affected by corrosion inhibitors. Residual effectiveness It remains dissolved in water for a long time an …
… efficiency constant They act in synergy with antiscalants and biocides pH correction Acid controls the alkalinity and pH of the recirculating water: a high pH increases the tendency to scale, particularly for calcium carbonate and phosphate, while too low a pH …
Chlorine dioxide High effectiveness against biofilm, action independent of pH and of the presence of corrosion inhibitors, no formation of organohalogen compounds and greater residual effectiveness; less effective on copper, not suitable for galvanised steel. …
Also in: Disinfection methods (Annex 13) · Cooling towers, swimming pools and whirlpool baths · Criteria for choosing the treatment
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