International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
Vol. 12, No. 5, 2015, pp. 1695-1704
Bioline Code: st15158
Full paper language: English
Document type: Research Article
Document available free of charge
International Journal of Environment Science and Technology, Vol. 12, No. 5, 2015, pp. 1695-1704
© Copyright 2015 - International Journal of Environment Science and Technology
Sorption and desorption of tetracycline on layered manganese dioxide birnessite|
Jiang, W.-T.; Chang, P.-H.; Wang, Y.-S.; Tsai, Y.; Jean, J.-S. & Li, Z.
Birnessite is one of the most common manganese
oxides in the clay-sized fraction (<2 µm) of soils and
has high cation exchange capacity and larger surface area.
Birnessite was previously studied for decomposition of
selected antibiotics from water. In this study, the removal
of tetracycline (TC) by birnessite from aqueous solution
was investigated as a function of initial tetracycline concentration,
solution pH, temperature, and equilibrium time.
Changes in solid phase after TC adsorption and desorption
were characterized by X-ray photoelectron spectroscopy,
X-ray diffraction (XRD), and Fourier transform infrared
analyses. Desorption of exchangeable cations accompanying
TC removal and partial desorption of TC from birnessite
by AlCl3 confirmed that cation exchange was
responsible for TC removal at low initial concentrations.
Both the external and internal surface areas were readily
available for TC uptake by birnessite. The intercalated TC
formed a horizontal monolayer configuration in the interlayer
of birnessite as deduced from XRD analyses.
Adsorption; Birnessite; Intercalation; Swelling; Tetracycline
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