Journal
APPLIED SURFACE SCIENCE
Volume 258, Issue 10, Pages 4449-4454Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2012.01.004
Keywords
Ferrihydrite; Formation environment; Adsorption-desorption; Pb(II)
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Funding
- Natural Science Foundation of China [20877021]
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Ferrihydrites named Fh-1, Fh-2, and Fh-3 were prepared under different environmental conditions. The sorption/desorption of Pb(II) onto/from the three ferrihydrites was studied. The effects of the most relevant operating conditions (e.g., pH, concentration of metal ions and temperature, etc.) were investigated. Adsorption/desorption isotherms were employed to evaluate the degree of reversible adsorption of Pb(II) onto the three ferrihydrites.Fh-3 exhibited the largest adsorption capacity and highest irreversible degree for Pb(II). Moreover, Fh-3 can lock metal ions very well. This phenomenon indicated that the formative conditions of ferrihydrite were critical in predicting the toxicity, transport, and fate of trace metals in a subsurface environment. (C) 2012 Elsevier B.V. All rights reserved.
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