Bench-scale experiments determined the inactivation rates of adenovirus serotype 2 with
low-pressure, high-output ultraviolet (UV) light, chlorine (Cl<sub>2</sub>), and preformed chloramines.
Studies with sequential chloramines were also done to mimic water treatment practices.
Sequential experiments with adenovirus serotype 2 suspended in laboratory-grade water
and natural waters containing ammonia were exposed to either UV light followed by
Cl<sub>2</sub>/chloramines or the reverse sequence. Adenovirus log reductions were quantified through
cell culture techniques. A free Cl2 C × T (concentration × time) of 1.22 mg-min/L resulted in a
3.72-log reduction, a preformed chloramine C × T of 264.5 mg-min/L resulted in a 1.2-log
reduction, a sequential chloramine C × T of 40.5 mg-min/L resulted in a 1-log reduction, and
a UV dose of 40 mJ/cm<sub>2</sub> resulted in a 1-log reduction. Up to 4-log reductions were achieved
with a UV dose of 40 mJ/cm<sub>2</sub> followed by a sequential chloramine C × T of 27.2 mg-min/L.
This suggests that sequential disinfection may be the best option for dealing with UV-resistant
organisms such as adenoviruses.
Includes 39 references, figures.
| Edition : | Vol. 96 - No. 10 |
| File Size : | 1
file
, 210 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 7 |
| Published : | 10/01/2004 |
