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Table 3 Ct values for rAdV inactivation by free chlorine determined by Chick-Watson model

From: Recombinant adenovirus as a model to evaluate the efficiency of free chlorine disinfection in filtered water samples

Water sample a

- Log 10 inactivation

Ct (mg/L x min) model (mean/standard deviation)

EPA guidance manual Ct value (1991)

BDF pH 8.0 20°C

2

0.87/0.17

1

3

1.49/0.70

2

4

1.87/0.88

3

BDF pH 6.9 20°C

2

0.016/NOb

1

3

0.091/0.047

2

4

0.187/0.08

3

LP 20°C

2

0.022/0.005

1

3

0.06/0.028

2

4

0.14/0.028

3

LP 15°C

2

0.014/0.005

2

3

0.06/0.028

3

4

0.14/0.028

4

MQ 20°C

2

0.005/NOb

1

3

0.027/0.015

2

4

0.067/0.013

3

MQ 15°C

2

0.017/0.001

2

3

0.048/0.013

3

4

0.101/0.033

4

  1. aBDF: Buffered demand free; LP: Lagoa do Peri Water Treatment Plant; MQ: Morro dos Quadros Water Treatment Plant.
  2. bNO: not observed.
  3. Ct values (mean/standard deviation) calculated for each experimental condition and compared with EPA Guidance Manual.