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

了解环境中的铁循环至关重要，因为氧化铁在吸收可溶性污染物（如有毒金属）方面效率很高。乍一看，铁循环似乎相当直接，即亚铁的微生物和/或化学氧化和随后的氧化铁沉淀，铁氧化铁的非生物和/或生物还原和随后的氧化物的还原性溶解。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、磷酸盐等。因此，本提案旨在研究在几种已知影响铁转化和/或稳定性的溶质存在的情况下，天然和合成生物氧化铁（BIOS）中的铁循环。这个

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