Sample

[As] = Aexp(−t/t₀)

Turbidity Y = A₂ + (A₁ − A₂)/(1 + (t/t₀₁)^p)

A

t_o

t_1/2

pH_i

pH_f

A₁

A₂

T₀₁

p

Zimapan

61.9

3.5

2.43

7.92

8.13

−0.014

0.696

21.24

2.306

Tap water

500

14.7

10.19

7.30

7.90

0.033

1.165

31.32

1.58