Fe(III)-mediated anaerobic ammonium oxidation: A novel microbial nitrogen cycle pathway and potential applications
Fe(III)-mediated anaerobic ammonium oxidation: A novel microbial nitrogen cycle pathway and potential applications
复制标题
Fe(III)介导的厌氧氨氧化：一种新型的微生物氮循环途径和潜在应用
DOI：
10.1080/10643389.2021.1903788
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发表时间：
2021-03
影响因子：
12.6
通讯作者：
Nan-Qi Ren
中科院分区：
文献类型：
--
作者：
Xin Tan;Guo-Jun Xie;Wen-Bo Nie;De-Feng Xing;Bing-Feng Liu;Jie Ding;Nan-Qi Ren
摘要
铵（NH₄⁺）氧化对于氮（N）的去除至关重要，有助于区域和全球的氮循环，但一直被认为局限于少数几种生物途径。在微生物中发现了一种铵（NH₄⁺）氧化和氮循环的新途径。
Abstract Ammonium (NH4 +) oxidation is crucial for nitrogen (N) removal, contributing to regional and global N cycles, but is regarded as limited to a few biological pathways. A novel pathway for NH4 + oxidation and the N cycle is provided in the microbial anaerobic NH4 + oxidation coupled with Fe(III) (ferric iron) reduction, called ferric ammonium oxidation (Feammox). Over the past few years, Feammox, which results in significant loss of N in natural environments, has been detected widely in both terrestrial and aquatic ecosystems. Researchers have revealed various Feammox pathways, end products of nitrate (NO3 -), nitrite (NO2 -), and gaseous nitrogen (N2), and the interactions within the nitrogen and iron-cycle-related microbial communities, which might offer some novel alternative processes for wastewater treatment. However, there are substantial variations among different studies in terms of the key functional microorganisms. The underlying mechanisms of Feammox, as well as the effect of environmental factors, remain poorly understood. In this review of the emerging process, we detail the end-products and microbes involved in the Feammox process and discuss possible mechanisms and the main influential factors. In particular, we assess the potential applications in wastewater treatment based on previous experimental studies and highlight knowledge gaps and future research opportunities.
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