Development and Implementation of a Highly Sensitive Method for Analyzing Chemical Forms of Iron Using XAFS Measurements
The chemical forms of iron significantly influence the dynamics of nutrients and biological productivity in the water environment. The most common oxidized form of iron, Fe(III), forms insoluble compounds such as goethite (α-FeOOH) in its oxidized state. Especially, Fe(III) compounds readily adsorb...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Japan Society on Water Environment
2025-01-01
|
| Series: | Journal of Water and Environment Technology |
| Subjects: | |
| Online Access: |
https://www.jstage.jst.go.jp/article/jwet/23/1/23_24-077/_pdf
|
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849721198593703936 |
|---|---|
| author | Iori Mishima Keiichi Kubota Tomohide Watanabe |
| author_facet | Iori Mishima Keiichi Kubota Tomohide Watanabe |
| author_sort | Iori Mishima |
| collection | DOAJ |
| description | The chemical forms of iron significantly influence the dynamics of nutrients and biological productivity in the water environment. The most common oxidized form of iron, Fe(III), forms insoluble compounds such as goethite (α-FeOOH) in its oxidized state. Especially, Fe(III) compounds readily adsorb phosphate ions, effectively preventing phosphorus from dissolving into the water. Conversely, in a reductive environment, the reduction of Fe(III) to Fe(II) can release previously adsorbed phosphorus. These interactions are considered crucial for proper water quality management and environmental conservation, with a focus on the chemical forms of iron. In this study, highly sensitive methods for analyzing the chemical forms of iron using X-ray absorption fine structure (XAFS) measurements were developed. Four pretreatment methods were evaluated, and anaerobic drying was found to most effectively preserve the reduced iron state. Pattern fitting techniques were applied to sediment samples, and it was shown that the method could accurately describe the iron forms in these samples. These findings are considered to contribute to the understanding of iron’s role in nutrient cycling and its broader impact on water environments. |
| format | Article |
| id | doaj-art-54ce323f3f5c49cd932d1176c88ecb7a |
| institution | DOAJ |
| issn | 1348-2165 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Japan Society on Water Environment |
| record_format | Article |
| series | Journal of Water and Environment Technology |
| spelling | doaj-art-54ce323f3f5c49cd932d1176c88ecb7a2025-08-20T03:11:45ZengJapan Society on Water EnvironmentJournal of Water and Environment Technology1348-21652025-01-01231465510.2965/jwet.24-07710.2965/jwet.24-077Development and Implementation of a Highly Sensitive Method for Analyzing Chemical Forms of Iron Using XAFS MeasurementsIori Mishima0Keiichi Kubota1Tomohide Watanabe2 Water Environment Group, Center for Environmental Science in Saitama, Kazo, Japan Graduate School of Science and Technology, Gunma University, Kiryu, Japan Graduate School of Science and Technology, Gunma University, Kiryu, Japan The chemical forms of iron significantly influence the dynamics of nutrients and biological productivity in the water environment. The most common oxidized form of iron, Fe(III), forms insoluble compounds such as goethite (α-FeOOH) in its oxidized state. Especially, Fe(III) compounds readily adsorb phosphate ions, effectively preventing phosphorus from dissolving into the water. Conversely, in a reductive environment, the reduction of Fe(III) to Fe(II) can release previously adsorbed phosphorus. These interactions are considered crucial for proper water quality management and environmental conservation, with a focus on the chemical forms of iron. In this study, highly sensitive methods for analyzing the chemical forms of iron using X-ray absorption fine structure (XAFS) measurements were developed. Four pretreatment methods were evaluated, and anaerobic drying was found to most effectively preserve the reduced iron state. Pattern fitting techniques were applied to sediment samples, and it was shown that the method could accurately describe the iron forms in these samples. These findings are considered to contribute to the understanding of iron’s role in nutrient cycling and its broader impact on water environments. https://www.jstage.jst.go.jp/article/jwet/23/1/23_24-077/_pdf anaerobic sedimentiron formpretreatmentpattern fittingxafs spectra |
| spellingShingle | Iori Mishima Keiichi Kubota Tomohide Watanabe Development and Implementation of a Highly Sensitive Method for Analyzing Chemical Forms of Iron Using XAFS Measurements Journal of Water and Environment Technology anaerobic sediment iron form pretreatment pattern fitting xafs spectra |
| title | Development and Implementation of a Highly Sensitive Method for Analyzing Chemical Forms of Iron Using XAFS Measurements |
| title_full | Development and Implementation of a Highly Sensitive Method for Analyzing Chemical Forms of Iron Using XAFS Measurements |
| title_fullStr | Development and Implementation of a Highly Sensitive Method for Analyzing Chemical Forms of Iron Using XAFS Measurements |
| title_full_unstemmed | Development and Implementation of a Highly Sensitive Method for Analyzing Chemical Forms of Iron Using XAFS Measurements |
| title_short | Development and Implementation of a Highly Sensitive Method for Analyzing Chemical Forms of Iron Using XAFS Measurements |
| title_sort | development and implementation of a highly sensitive method for analyzing chemical forms of iron using xafs measurements |
| topic | anaerobic sediment iron form pretreatment pattern fitting xafs spectra |
| url |
https://www.jstage.jst.go.jp/article/jwet/23/1/23_24-077/_pdf
|
| work_keys_str_mv | AT iorimishima developmentandimplementationofahighlysensitivemethodforanalyzingchemicalformsofironusingxafsmeasurements AT keiichikubota developmentandimplementationofahighlysensitivemethodforanalyzingchemicalformsofironusingxafsmeasurements AT tomohidewatanabe developmentandimplementationofahighlysensitivemethodforanalyzingchemicalformsofironusingxafsmeasurements |