| http://www.w3.org/ns/prov#value | - Specifically, there may be used a catalyst wherein at least one member selected from noble metals such as platinum, palladium and silver as well as oxides of heavy metals such as iron, chromium, copper, nickel and cobalt, for example Fe2 O3, MnO2, Mn2 O3, Cr2 O3, NiO, CoO, Co3 O4, CuO, etc. deposited on a suitable carrier such as alumina, as generally used as oxidation catalysts for treatment of e
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