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Table 3 Effect of initial reactant concentration ratio Fe(II):Cr(VI)

From: Study on the influence mechanism of underground mineral element Fe(II) on Cr(VI) transformation under subsurface and groundwater interaction zones

Case

Experiment conditions

CFe(II) (mg/L)

CCr(VI) (mg/L)

DO

1

Fe(II):Cr(VI) = 1:1

20

20

Hyperoxia

2

20

20

Anoxic

3

Fe(II):Cr(VI) = 2:1

45

20

Hyperoxia

4

45

20

Anoxic

5

Fe(II):Cr(VI) = 3:1

64

20

Hyperoxia

6

64

20

Anoxic

7

Fe(II):Cr(VI) = 4:1

86

20

Hyperoxia

8

86

20

Anoxic

9

Fe(II):Cr(VI) = 5:1

106

20

Hyperoxia

10

106

20

Anoxic