sc8b02762_si_001.pdf (336.71 kB)
In Situ Fabrication of Electro-Fenton Catalyst from Fe2+ in Acid Mine Drainage: Influence of Coexisting Metal Cations
journal contribution
posted on 2018-09-12, 00:00 authored by Yi-Meng Sun, Lin-Feng Zhai, Ming-Feng Duan, Min SunThe
air-cathode fuel cell (AC-FC) technology provides a facile
approach to in situ utilize Fe2+ in acid mine drainage
(AMD) for the fabrication of iron oxide/carbon composite with electro-Fenton
(EF) catalytic activity. Herein, the impacts of coexisting metal cations
other than the Fe2+ in AMD on such an EF catalyst fabrication
process are investigated. The results show that coexisting metal cations
are able to be introduced into the Fe3O4/GF
composite and influence iron content in it. The Ni2+, Zn2+, Al3+, and Cu2+ in AMD lower iron
content in the prepared composite and thus present a detrimental effect
on its EF catalytic activity. In comparison, the Co2+ and
Mn2+ hardly affect iron content in the composite. Instead,
they are doped into the Fe3O4 structure to give
mixed-metal oxides with enhanced EF catalytic activities. Practice
on the treatment of real AMDs suggests the practical effectiveness
of AC-FC technology for the simultaneous removal of heavy metal cations
and fabrication of heterogeneous EF catalyst from real AMDs. Notably,
the AC-FC technology is expected to provide a prospective approach
for fabricating transition metal doped iron oxides from AMD rich in
Fe2+ and transition metal cations.