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.
journal_name
Chemospherejournal_title
Chemosphereauthors
Choi J,Batchelor B,Won C,Chung Jdoi
10.1016/j.chemosphere.2011.11.035subject
Has Abstractpub_date
2012-02-01 00:00:00pages
860-5issue
8eissn
0045-6535issn
1879-1298pii
S0045-6535(11)01327-0journal_volume
86pub_type
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