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论文类型： 期刊论文

发表时间： 2014-12-01

发表刊物： CURRENT MICROBIOLOGY

收录刊物： SCIE、PubMed、Scopus

卷号： 69

期号： 6

页面范围： 880-887

ISSN号： 0343-8651

摘要： The iron-reducing capability of anammox bacteria was examined in this study using Percoll purified anammox bacteria. Anammox bacteria could reduce Fe(III) to Fe(II) with organic matters as the electron donor. The activity of anammox iron-reducing process was dependent on different electron donor, acceptor and pH. The highest iron-reducing activity of anammox bacteria was achieved with Fe(III)-NTA (nitrilotriacetic acid) as electron acceptor and formate as the electron donor at pH7. Similar to other iron reducers, 80 % of the iron reductase in anammox bacteria was located in the membrane fraction. Due to the chemical oxidant of NO2- and the NO3- dependent ferrous iron oxidation by anammox bacteria, the iron-reducing activity of anammox bacteria could be severely inhibited when iron-reducing pathway and the anammox process were coupled. However, the total nitrogen removal efficiency was not significantly affected in the presence of Fe(III). The iron-reducing capability of anammox bacteria could influence both N and Fe cycle on earth, and it is a potential way for wastewater treatment.