Spectroscopic Investigation of Interfacial Interaction of Manganese Oxide with Triclosan, Aniline, and Phenol.
We investigated the reaction of manganese oxide [MnOx(s)] with phenol, aniline, and triclosan in batch experiments using X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and aqueous chemistry measurements. Analyses of XPS high-resolution spectra suggest that the Mn(III) content increased 8-10% and the content of Mn(II) increased 12-15% in the surface of reacted MnOx(s) compared to the control, indicating that the oxidation of organic compounds causes the reduction of MnOx(s). Fitting of C 1s XPS spectra suggests an increase in the number of aromatic and aliphatic bonds for MnOx(s) reacted with organic compounds. The presence of 2.7% Cl in the MnOx(s) surface after reaction with triclosan was detected by XPS survey scans, while no Cl was detected in MnOx-phenol, MnOx-aniline, and MnOx-control. Raman spectra confirm the increased intensity of carbon features in MnOx(s) samples that reacted with organic compounds compared to unreacted MnOx(s). These spectroscopy results indicate that phenol, aniline, triclosan, and related byproducts are associated with the surface of MnOx(s)-reacted samples. The results from this research contribute to a better understanding of interactions between MnOx(s) and organic compounds that are relevant to natural and engineered environments.
Department of Civil Engineering, University of New Mexico , MSC01 1070, Albuquerque, New Mexico 87131, United States.
Nabil
N
Shaikh
Department of Civil and Environmental Engineering, Temple University , 1947 North 12th Street, Philadelphia, Pennsylvania 19122, United States.
Saru
S
Taujale
Department of Civil and Environmental Engineering, Temple University , 1947 North 12th Street, Philadelphia, Pennsylvania 19122, United States.
Huichun
H
Zhang
Department of Chemical Engineering, University of New Mexico , MSC01 1120, Albuquerque, New Mexico 87131, United States.
Kateryna
K
Artyushkova
Department of Earth and Planetary Sciences, University of New Mexico , MSC03 2040, Albuquerque, New Mexico 87131, United States.
Abdul-Mehdi S
AS
Ali
Department of Civil Engineering, University of New Mexico , MSC01 1070, Albuquerque, New Mexico 87131, United States.
José M
JM
Cerrato