Time (days) - UWSpace - University of Waterloo
Time (days) - UWSpace - University of Waterloo
Time (days) - UWSpace - University of Waterloo
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Data from the control reactors indicated that persulfate at the low concentration was<br />
stable for the entire ~80 <strong>days</strong> experimental period, while persulfate at the high concentration<br />
was stable for the first 80 <strong>days</strong> and then decreased significantly (2 data points) until the<br />
experiment was terminated at ~300 <strong>days</strong>. Uncatalyzed degradation <strong>of</strong> persulfate can be<br />
initiated through homolytic cleavage <strong>of</strong> persulfate to produce hydrogen sulfate and oxygen<br />
(Kolth<strong>of</strong>f and Miller, 1951; House, 1962; Berlin, 1986) as given by<br />
2−<br />
− 1<br />
S 2O8<br />
+ H 2O<br />
→ 2 HSO4<br />
+ O2<br />
(2.2)<br />
2<br />
At the experimental temperature conditions used here (~20 ºC) this is a very slow reaction<br />
with an estimated first-order rate coefficient <strong>of</strong> 3.7×10 -4 day -1 (House, 1962), and therefore<br />
leads to little (
Change language