A new indicator to evaluate the pollution of iron and manganese

Abstract

Heavy metals in Anshan tailings is in line with Chinese national standards, but it still contains a huge amount of iron and manganese, much higher than the soil background level in China. Iron and manganese leaching into water via precipitation can cause water pollution. The serious acid rain in Liaoning Province exacerbates the process of migration and transformation. Based on the rainfall characteristics of Liaoning Province, the study simulated the leaching process of acid rain to explore the release effect of iron and manganese with different pH values. We studied the behavior of Danio rerio to evaluate the contamination of iron and manganese, finally to obtain an online monitoring method for heavy metal pollution in water. SOD and GPX were measured to explore the toxicity mechanism of iron and manganese. Activated sludge, as a kind of cheap, efficient and recyclable material, has a great effect on removing heavy metals in water. This study is the first to use activated sludge to remove iron and manganese in water, proving that the activated sludge has a significant effect on removal of iron and manganese.