Study on purification method of micro-polluted groundwater

The infiltration of surface water makes the groundwater with only iron, manganese and heavy metal elements exceeding the standard be invaded by ammonia nitrogen, nitrate and organic matter, forming compound pollution groundwater, which has attracted extensive attention of scholars at home and abroad. This paper introduces the source and harm of micro-pollutants in groundwater, and expounds the research progress of biological method, adsorption method and contact oxidation method to treat micro-polluted groundwater, which lays a foundation for the selection of micro-polluted groundwater treatment methods.