Impact of EPA Drinking Water Stage 2 Disinfectant and Disinfectant ...
Impact of EPA Drinking Water Stage 2 Disinfectant and Disinfectant ... Impact of EPA Drinking Water Stage 2 Disinfectant and Disinfectant ...
18Chemistry of Chloramines• Chloramine is a general term that describes threerelated compounds:• Monochloramine, NH 2 Cl• Dichloramine, NHCl 2• Trichloramine, NCl 3• Monochloramine is the preferred chloraminecompound for drinking water disinfection.Disinfection
19Chemistry of Chloramines• The molecular structure ofall three chloraminecompounds resembles thestructure of ammonia.• A chlorine atom willreplace one, two, andthree hydrogen atomsrespectively for theformation of mono-, di-,and trichloramines.NH 3 + HOCl à NH 2 Cl + H 2 ONH 2 Cl + HOCl à NHCl 2 + H 2 ONHCl 2 + HOCl à NCl 3 + H 2 ODisinfection
- Page 1 and 2: 1Impact of EPA Drinking Water Stage
- Page 3 and 4: 3Safe Drinking Water Act of 1974•
- Page 5 and 6: Stage 2 Rule5• The Stage 2 Disinf
- Page 7 and 8: Chemistry of Chlorination7• Free
- Page 9 and 10: 9Chemistry of Chlorination• Free
- Page 11 and 12: 11Chemistry of Chlorine• Atomic N
- Page 13 and 14: 13Chemistry of Chlorination• Duri
- Page 15 and 16: 15History of Monochloramine Use•
- Page 17: 17Chemistry of ChloraminesThe Basic
- Page 21 and 22: 21CleanWaterDBP: Free Chlorine Trea
- Page 23 and 24: Chloramination Process23• To form
- Page 25 and 26: Chloramination Process25• Chlorin
- Page 27 and 28: 27Chemical AdditionChemicalFeed Rat
- Page 29 and 30: 29Chemical Addition• Goal: 5:1 we
- Page 31 and 32: 31Measurement ChallengesPhotometry,
- Page 33 and 34: 33Desired Analyzer Design FeaturesP
- Page 35 and 36: 35Desired Analyzer Design FeaturesQ
- Page 37 and 38: 37Summary of Desired FeaturesA cont
- Page 39 and 40: 39Measuring Process1. Zero measurem
- Page 41 and 42: Monochloramine Monitoring41• Chlo
- Page 43 and 44: Would You Benefit?43• Would you b
- Page 45: 45Questions?Thank you for your atte
19Chemistry <strong>of</strong> Chloramines• The molecular structure <strong>of</strong>all three chloraminecompounds resembles thestructure <strong>of</strong> ammonia.• A chlorine atom willreplace one, two, <strong>and</strong>three hydrogen atomsrespectively for theformation <strong>of</strong> mono-, di-,<strong>and</strong> trichloramines.NH 3 + HOCl à NH 2 Cl + H 2 ONH 2 Cl + HOCl à NHCl 2 + H 2 ONHCl 2 + HOCl à NCl 3 + H 2 ODisinfection
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