What harm does the content of iron and manganese ions in water have to human health?

China is rich in groundwater resources, and many groundwater have iron and manganese contents exceeding the standard, which is called iron-containing and manganese-containing groundwater. Honghu first station is located in the middle and lower reaches of the Yangtze River and belongs to the high-speed section of groundwater.

In clear natural groundwater, iron is mainly soluble divalent iron ions. After the ground pumped by local groundwater comes into contact with air, the iron-containing groundwater is no longer clear and transparent, and becomes "yellow soup". This is mainly due to the oxidation of ferrous ions in groundwater by oxygen in the air, resulting in orange iron hydroxide Fe(OH).

Sediment.

4Fe+O2+l0h 20 = 4Fe(OH)3+8H

Excessive iron and manganese in water will do great harm to drinking water and industrial water. According to the national regulations, the content of iron ion in drinking water is ≤0,3 mg/L, and the content of manganese ion is ≤ 0,1mg/L. Both iron and manganese are essential elements for human body, so long as the water content does not exceed the standard, it will not affect human health. However, the iron content in water is 1 >: at 0.3 mg/l, the water becomes turbid, and when it exceeds 1 mg/l, the water has an iron taste; When boilers, pressure vessels and other equipment use water with high iron content as medium, it will often cause pollution and poisoning of ion exchange equipment in softening equipment, and the pressure-bearing equipment will form brown hard iron sheets, which will lead to deformation and tube explosion accidents. Therefore, it is very important to remove iron and manganese from iron-containing water.