Manganese dioxide in accordance with EN 13752
Based on naturally occurring manganese dioxide, EVERZIT® Mn is used primarily for catalytic manganese removal in drinking water and mineral water treatment. The high active surface area of EVERZIT® Mn facilitates oxidation of iron and manganese in water with high oxygen content and promotes formation of hydrated oxide floccules which are easily filtered out.
EVERZIT® Mn is used as a single-layer filter media or as the bottom layer (in place of quartz sand) in dual media filters. In certain cases it can be also used in mixed beds in combination with quartz sand.
If the raw water treated has high iron content, use of a sufficiently thick EVERZIT® N upper layer is recommended. This top layer retains most of the iron, protecting the EVERZIT® Mn bottom layer and allowing it to selectively remove manganese.
EVERZIT® Mn is inert to carbon dioxide and reliably removes manganese even at slightly acidic pH levels (i.e. > 6.5). Therefore in most cases there is no need to increase the pH value before manganese removal.