pH

t˚

Ca²⁺

K⁺

Mg²⁺

Mn²⁺

${\text{PO}}_4^{3-}$

Al³⁺

Drilling water containing wood chips

4.3

26.2

13

mg·L⁻¹

5.7

mg·L⁻¹

21

mg·L⁻¹

0.05

mg·L⁻¹

1.05

mg·L⁻¹

0.8

mg·L⁻¹

Ordinary drilling water

7.08

26.8

6

mg·L⁻¹

0.123

mg·L⁻¹

3.66

mg·L⁻¹

0.02

mg·L⁻¹

0.008

mg·L⁻¹

0.043

mg·L⁻¹