Data for: Activation of bisulfite by LaFeO3 loaded on red mud for degradation of organic dye

In this study, red mud was used as a support for LaFeO3 to prepare a
synergistic catalyst (LaFeO3-RM) via ultrasonic-assisted sol-gel method
for the enhanced removal of methylene blue (MB) assisted with bisulfite
(BS) in an aqueous solution. The Characterization of SEM and BET indicated
that comparing with the non-porous structure of bulk LaFeO3, LaFeO3-RM
exhibited high surface area and obvious porous structure with a higher
pore volume (i.e. 10 times). XRD, XPS and FTIR revealed that in addition
to dispersing LaFeO3 particles, the support of porous RM also increased Fe
oxidation activity, oxygen-containing functional groups and chemically
adsorbed oxygen (from 44.3% to 90.3%) of LaFeO3-RM which enhanced the
catalytic performance in structure and chemical composition. MB was
removed through the synergistic effect of adsorption and catalysis with MB
molecule was first absorbed on the surface and then degraded. The
pseudo-first-order kinetic constant of LaFeO3-RM was 6 times than that of
LaFeO3. Fe(III) in LaFeO3-RM played a key role in the activation of BS to
produce SO4·- by the redox cycle of Fe(III)/Fe(II). With the application
of LaFeO3-RM as a promising low-cost synergistic catalyst for the
activation of BS under neutral condition, this work provides a new
approach of using porous industrial waste to improve the catalytic
performance of LaFeO3.