[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Chloramine Quandry...
After putting my college education to use and a bit of web surfing:
EVERYTHING BELOW IS BASED ON APPROXIMATES. NO
EXPERIMENTERS WERE HARMED DURING THESE
CALCULATIONS!!! : ))
Half-life of chloramine: 8 hours to 20 days depending on conditions
Dissociation rate: 4.9*10^-33 or
.00000000000000000000000000000049 %
is found as NH4+ and Cl-
Drinking water concentration: 3.56mg/L
Assuming a first order reaction to break down (couldn't find data):
rate(8 hours)=.087 /hour
rate(20 days)=1.4*10^-3 /hour
This means that somewhere between .14 and 8.7 percent of the
remaining
chloramine breaks down per hour.
And for you David, THE EQUATION!!!
*******************************
Concentration @ time T=Original Concentration* e^(rate from above*T)
C=(3.56mg/L)2.71828^(-.087*T)
********************************
If we assume the standard concentration (call your municipal supplier.)
Using Bob Dixon's overnight "airing out" (be generous and give 12
hours.)
Final Concentration=1.26 mg/L
Still there, but about 1/3 the concentration.
Hope this clears the water. : )
Douglas Bertelsen
(Chemical Engineer in Training who uses a Python and no chlorine
remover)
dbert at umr_edu