Nitrate reduction by green rusts modified with trace metals. Academic Article

abstract

• A kinetic study of nitrate reduction by green rust (GR), a group of layered Fe(II)-Fe(III) hydroxide solids, was performed using a batch reactor system. The reduction rate of nitrate by GRs was affected by the anion content in the interlayer of GRs. GR containing F(-) (GR-F) showed the fastest reduction rate while GR-SO(4) showed 9 times slower reaction rate than GR-F. The addition of 1mM Pt or Cu to GR that contained 85 mM Fe(II) improved the reduction kinetics of nitrate by up to 200 times. Pt was an effective activating agent for all GRs. The sequential step reaction model that we proposed appropriately simulated the experimental data. The fastest nitrate reduction by GR-F with Pt was achieved at pH 9 among 7.5 to 11. At that condition, 1mM nitrate transformed completely into ammonium within 23 min.

authors

• Batchelor, Bill

published proceedings

• Chemosphere

author list (cited authors)

• Choi, J., Batchelor, B., Won, C., & Chung, J.

citation count

• 26

complete list of authors

• Choi, Jeongyun||Batchelor, Bill||Won, Chanhee||Chung, Jinwook

publication date

• February 2012

publisher

• Elsevier  Publisher

published in

• Chemosphere  Journal

keywords

• Environmental Pollutants
• Ferric Compounds
• Ferrous Compounds
• Kinetics
• Nitrates
• Oxidation-Reduction
• Platinum

Digital Object Identifier (DOI)

• 10.1016/j.chemosphere.2011.11.035

start page

• 860

end page

• 865

volume

• 86

issue

• 8

URL

• http://dx.doi.org/10.1016/j.chemosphere.2011.11.035