Study on distribution characteristics of some water parameters properties of mine drainage in an oxidation pond, Hwangji-Yuchang coal mine, South Korea

Tracer test, in situ distribution test, and computational flow analysis at an oxidation pond, consisting of passive treatment system treating coal mine drainage at the Hwangji-Yuchang coal mine in South Korea were performed to identify the distributed physicochemical and rheological characteristics of the acid mine drainage. The influent mine water that flowed into the oxidation pond was at pH 6.79 and had 25.5 mg/l of ferrous iron concentration and the flow rate was 59.3 m³/h. As a result of the studies, oxidation of Fe²⁺ in the oxidation pond was found to have mostly occurred near the inlet of the pond. The distribution of the physical properties such as pH, dissolved oxygen, electric conductivity, total dissolved solid, turbidity, ferrous concentration, oxide reduction potential and water depth in the oxidizing pond was found to have been directly affected by the ferrous iron oxidation rate and rheological characteristics of the influent.