(763b) Magnetic Polyaniline Nanocomposites for Environmental Remediation

Magnetic Polyaniline Nanocomposites
for Environmental Remediation

Hongbo Gu, Sowjanya B.
Rapole, Yudong Huang, Suying Wei and Zhanhu Guo

In this talk, the toxic Cr(VI)
removal from polluted water by the magnetic conductive polyaniline (PANI) polymer
nanocomposites (PNCs) was investigated. The PNCs were synthesized using a
facile surface initiated polymerization (SIP) method. The effects of initial
Cr(VI) concentration, PNC concentration and pH value on the Cr(VI) removal have
been studied. The synthesized PNCs showed unique capability to remove Cr(VI) in
solutions in a wide pH range. The saturation magnetization of these PNCs was
observed to have no obvious decrease after treatment with Cr(VI) solutions and they
can be easily recycled by a permanent magnet. The Cr(VI) removal kinetics in
the different pH solutions was determined. The Cr(VI) removal mechanism was
investigated by Fourier transform infrared spectroscopy (FT-IR), X-ray
photoelectron spectroscopy (XPS), energy-filter transmission electron microscopy
(EFTEM) and temperature dependent resistivity as well.