Analysis of Iron and Manganese Release Effect in Drinking Water Systems from a New Perspective

In recent years, with the continuous attention to the quality of drinking water and the intensive research on the corrosion of water distribution systems, the problem of metal ions release has attracted more and more attention by researchers. This paper studies metal ions release in drinking water systems from the perspective of occluded water. It has been found that the concentration of iron and manganese ions in the bulk water increases with the concentration of chloride and sulfate ions when only the effect of occluded water on metal ions release is considered. This result is consistent with previous studies. The concentration of iron and manganese ions in the bulk water does not decrease as the pH increases. At the same time, the presence of pipe scales is also a potential threat to the quality of drinking water. It has been found that the concentration of iron and manganese ions in the bulk water also increases as the amount of pipe scales increases. Fe3O4 has an adsorption effect on iron, and a single component pipe scale cannot hinder the migration of manganese in the occluded water.