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Adsorption of Orthophosphate to Humic‐Fe‐Complexes and to Amorphous Fe‐Oxide
Open accessAbstract
The adsorption of orthophosphate to humic surfaces was studied in a model experiment. The adsorption maximum of humic substances greatly increased with higher concentrations of organically complexed Fe (III), indicating that orthophosphate was bound to humic surfaces via metal bridges. The molar ratio P adsorbed/Fe was nearly 1 for Fe freshly complexed to humic substances, whereas the ratio for amorphous Fe‐oxide was a tenfold lower. An increase in pH from 5.2 to 6.2 lead to an increase of P‐adsorption of about 30% in the case of humic‐Fe‐surfaces, which could be explained by an increased accessibility of adsorption sites at pH 6.2. The addition of a 0.01 M CaCl 2‐matrix increased orthophosphate adsorption at pH 6.2 but not at pH 5.2. This could be explained by electrostatic interactions caused by the Ca++ ion.
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Cited by
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Wilfert, P., Kumar, P. S., Korving, L., Witkamp, G.-J., & van Loosdrecht, M. C. M. (2015) · Environmental Science & Technology · doi:10.1021/acs.est.5b00150 · Cited by 607
Phosphorus Retention in Riparian Buffers: Review of Their Efficiency
Hoffmann, C. C., Kjaergaard, C., Uusi‐Kämppä, J., Hansen, H. C. B., & Kronvang, B. (2009) · Journal of Environmental Quality · doi:10.2134/jeq2008.0087 · Cited by 379
Mikutta, C., & Kretzschmar, R. (2011) · Environmental Science & Technology · doi:10.1021/es202300w · Cited by 281
Metadata
- Authors
- Gerke, J., & Hermann, R.
- Venue
- Zeitschrift für Pflanzenernährung und Bodenkunde
- Publisher
- Wiley
- Published
- 1992-01
- Volume
- 155
- Issue
- 3
- Pages
- 233-236
- ISSN
- 0044-3263 (ISSN-L)
- OpenAlex
- W2012205398
- Cited by
- 199
- References
- 0
- FWCI
- 22.37
- Type
- journal article
- Language
- en
- Open access
- green
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- Gerke, J., & Hermann, R. (1992). Adsorption of Orthophosphate to Humic‐Fe‐Complexes and to Amorphous Fe‐Oxide. Zeitschrift für Pflanzenernährung und Bodenkunde. https://doi.org/10.1002/jpln.19921550313
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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