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Table 5 Effect of humic acid experiment

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

CaseExperiment conditionsCFe(II) (mg/L)CFe(III) (mg/L)CCr(VI) (mg/L)CCr(III) (mg/L)HA (mg/L)DO
1HA + Fe(II)2000040Hyperoxia
22000040Anoxic
3HA + Fe(III)0120040Hyperoxia
40120040Anoxic
5HA + Cr(III)0001240Hyperoxia
60001240Anoxic
7HA + Cr(VI)0020040Hyperoxia
80020040Anoxic
9HA = 0 mg/L2002000Hyperoxia
102002000Anoxic
11HA = 15 mg/L20020015Hyperoxia
1220020015Anoxic
13HA = 40 mg/L20020040Hyperoxia
1420020040Anoxic