Affiliations: School of Environmental and Biological Science and
Technology, Dalian University of Technology, Dalian 116012, China | Department of Environmental Science and Engineering,
Dalian Jiaotong University, Dalian 116028, China
Abstract: A novel process, microwave assisted catalytic wet air oxidation
(MW-CWO), was applied for the degradation of H-acid (1-amino-8-naphthol-3,
6-disulfonic acid) in aqueous solution. Ni-loaded granular activated carbon
(GAG), prepared by immersion-calcination method, was used as catalyst. The
results showed that the MW-CWO process was very effective for the degradation
of H-acid in aqueous solution under atmospheric pressure with 87.4% TOC (total
organic carbon) reduction in 20 min. Ni on GAC existed in the form of NiO as
specified by XRD. Loss of Ni was significant in the initial stage, and then
remained almost constant after 20 min reaction. BET surface area results showed
that the surface property of GAC after MW-CWO process was superior to that of
blank GAC.
Keywords: microwave, degradation, catalysis, nickel, wet air oxidation
