Preparation and performance of manganese-oxide-coated zeolite for the removal of manganese-contamination in groundwater

A promising and easily prepared catalytic filler media, manganese-oxide-coated zeolite (MOCZ), for the removal of Mn (II) contamination in groundwater was studied. The optimal condition for MOCZ preparation was given as follows: acid activation of zeolite with 5% HCl mass percent for 12 h, then soaking of acid-activated zeolite with 7% KMnO4 mass percent for 8 h, and finally calcination at 300°C for 5 h. Acid activation significantly enlarged...