Iron cycling in the environment: new insights from the micro to the macro-scale

环境中的铁循环：从微观到宏观的新见解

• 批准号: RGPIN-2016-05025
• 负责人: Fortin, Danielle
• 金额: $ 2.4万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=634061
• 关键词: Iron; cycling; environment; new; insights

Understanding the iron cycle in the environment is of prime importance because iron oxides are highly efficient at sorbing soluble contaminants, such as toxic metals. At first glance, iron cycling appears rather straight forward, i.e., microbial and/or chemical oxidation of ferrous iron and subsequent precipitation of iron oxides and abiotic and/or biotic reduction of ferric iron oxides and subsequent reductive dissolution of the oxides. Recent studies have however shown that the iron cycle is far more complex than we thought and that iron behavior in the environment is closely linked to the presence of other solutes, such as arsenic, aluminum, nitrogen, silicon, sulfur, phosphate, etc. The present proposal therefore aims at investigating iron cycling in natural and synthetic biogenic iron oxides (BIOS) in the presence of several solutes known to affect iron transformation and/or stability. The

了解环境中的铁循环至关重要，因为氧化铁在吸附可溶性污染物（如有毒金属）方面非常有效。乍一看，铁循环似乎相当直接，即，二价铁的微生物和/或化学氧化和随后的铁氧化物沉淀以及三价铁氧化物的非生物和/或生物还原和随后的氧化物还原溶解。然而，最近的研究表明，铁的循环比我们想象的要复杂得多，铁在环境中的行为与其他溶质的存在密切相关，如砷、铝、氮、硅、硫、磷酸盐，因此，本提案旨在研究天然和合成生物氧化铁（BIOS）中的铁循环在已知影响铁转化和/或稳定性的几种溶质的存在下。的