t (months)

The rate of deterioration from baseline of production and storage of different month ferrate (VI) (%)

The monthly rate of ferrate (VI)

degradation (%)

1

4.1

4.1

2

4.9

0.7

3

5.7

0.8

4

9.1

3.6

5

14.4

5.8

6

20.5

7

7

24.3

4.7

8

24.7

0.5

9

39.1

19.1

10

61.2

36.2

11

79.8

48

12

95

75