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Ubiquitous presence of Fe(II) in aquatic colloids and its association with organic carbon

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dc.contributor.author von der Heyden, BP
dc.contributor.author Hauser, EJ
dc.contributor.author Mishra, B
dc.contributor.author Martinez, GA
dc.contributor.author Bowie, AR
dc.contributor.author Tyliszczak, T
dc.contributor.author Mtshali, Thato N
dc.contributor.author Roychoudhury, AN
dc.contributor.author Myneni, SBC
dc.date.accessioned 2016-07-20T11:10:19Z
dc.date.available 2016-07-20T11:10:19Z
dc.date.issued 2014-08
dc.identifier.citation von der Heyden, B.P. Hauser, E.J. Mishra, B. Martinez, G.A. Bowie, A.R. Tyliszczak, T. Mtshali, T.N. Roychoudhury, A.N. and Myneni, S.B.C. 2014. Ubiquitous presence of Fe(II) in aquatic colloids and its association with organic carbon. Environmental Science & Technology Letters, 1(10), 387-392 en_US
dc.identifier.issn 2328-8930
dc.identifier.uri http://pubs.acs.org/doi/pdf/10.1021/ez500164v
dc.identifier.uri http://hdl.handle.net/10204/8676
dc.description Copyright: 2014 American Chemical Society. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. The definitive version of the work is published in Environmental Science & Technology Letters, 1(10), 387-392 en_US
dc.description.abstract Despite being thermodynamically less stable, small ferrous colloids (60 nm to 3 µm in diameter) remain an important component of the biogeochemical cycle at the Earth’s surface, yet their composition and structure and the reasons for their persistence are still poorly understood. Here we use X-ray-based Fe L-edge and carbon K-edge spectromicroscopy to address the speciation and organic–mineral associations of ferrous, ferric, and Fe-poor particles collected from sampling sites in both marine and freshwater environments. We show that Fe(II)-rich phases are prevalent throughout different aquatic regimes yet exhibit a high degree of chemical heterogeneity. Furthermore, we show that Fe-rich particles show strong associations with organic carbon. The observed association of Fe(II) particles with carboxamide functional groups suggests a possible microbial role in the preservation of Fe(II). These finding have significant implications for the behavior of Fe(II) colloids in oxygenated waters, and their role in different aquatic biogeochemical processes. en_US
dc.language.iso en en_US
dc.publisher American Chemical Society en_US
dc.relation.ispartofseries Workflow;17218
dc.subject Aquatic colloids en_US
dc.subject Fe(II) en_US
dc.subject Iron en_US
dc.subject Organic carbon en_US
dc.title Ubiquitous presence of Fe(II) in aquatic colloids and its association with organic carbon en_US
dc.type Article en_US
dc.identifier.apacitation von der Heyden, B., Hauser, E., Mishra, B., Martinez, G., Bowie, A., Tyliszczak, T., ... Myneni, S. (2014). Ubiquitous presence of Fe(II) in aquatic colloids and its association with organic carbon. http://hdl.handle.net/10204/8676 en_ZA
dc.identifier.chicagocitation von der Heyden, BP, EJ Hauser, B Mishra, GA Martinez, AR Bowie, T Tyliszczak, Thato N Mtshali, AN Roychoudhury, and SBC Myneni "Ubiquitous presence of Fe(II) in aquatic colloids and its association with organic carbon." (2014) http://hdl.handle.net/10204/8676 en_ZA
dc.identifier.vancouvercitation von der Heyden B, Hauser E, Mishra B, Martinez G, Bowie A, Tyliszczak T, et al. Ubiquitous presence of Fe(II) in aquatic colloids and its association with organic carbon. 2014; http://hdl.handle.net/10204/8676. en_ZA
dc.identifier.ris TY - Article AU - von der Heyden, BP AU - Hauser, EJ AU - Mishra, B AU - Martinez, GA AU - Bowie, AR AU - Tyliszczak, T AU - Mtshali, Thato N AU - Roychoudhury, AN AU - Myneni, SBC AB - Despite being thermodynamically less stable, small ferrous colloids (60 nm to 3 µm in diameter) remain an important component of the biogeochemical cycle at the Earth’s surface, yet their composition and structure and the reasons for their persistence are still poorly understood. Here we use X-ray-based Fe L-edge and carbon K-edge spectromicroscopy to address the speciation and organic–mineral associations of ferrous, ferric, and Fe-poor particles collected from sampling sites in both marine and freshwater environments. We show that Fe(II)-rich phases are prevalent throughout different aquatic regimes yet exhibit a high degree of chemical heterogeneity. Furthermore, we show that Fe-rich particles show strong associations with organic carbon. The observed association of Fe(II) particles with carboxamide functional groups suggests a possible microbial role in the preservation of Fe(II). These finding have significant implications for the behavior of Fe(II) colloids in oxygenated waters, and their role in different aquatic biogeochemical processes. DA - 2014-08 DB - ResearchSpace DP - CSIR KW - Aquatic colloids KW - Fe(II) KW - Iron KW - Organic carbon LK - https://researchspace.csir.co.za PY - 2014 SM - 2328-8930 T1 - Ubiquitous presence of Fe(II) in aquatic colloids and its association with organic carbon TI - Ubiquitous presence of Fe(II) in aquatic colloids and its association with organic carbon UR - http://hdl.handle.net/10204/8676 ER - en_ZA


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