Nitrite, at an environmentally relevant concentration, was significantly reduced with iron (hydr) oxides mediated by Shewanella oneidensis MR-1. The average nitrite removal rates of 1.28 +/- 0.08 and 0.65 +/- 0.02 (mg L-1) h(1) were achieved with ferrihydrite and magnetite, respectively. The results showed that nitrite removal was able to undergo multiple redox cycles with iron (hydr) oxides mediated by Shewanella oneidensis MR-1. During the bioreduction of the following cycles, biogenic Fe(II) was subsequently chemically oxidized to Fe(III), which is associated with nitrite reduction. There was 11.18 +/- 1.26 mg L-1 of NH4+-N generated in the process of redox cycling of ferrihydrite. Additionally, results obtained by using X-ray diffraction showed that ferrihydrite and magnetite remained mainly stable in the system. This study indicated that redox cycling of Fe in iron (hydr) oxides was a potential process associated with NO2-N removal from solution, and reduced most nitrite abiotically to gaseous nitrogen species. (C) 2016 Elsevier Ltd. All rights reserved.