Time (day)

C_t (mg/L)

C_t/C_o (mg/L)

lnC_t/C_o

4

42

0.8936

−0.11

8

38

0.8085

−0.21

12

30

0.6383

−0.45

16

20

0.4255

−0.85

20

10

0.2128

−1.55