Single and Binary Fe- and Al-hydroxides Affect Potential Phosphorus Mobilization and Transfer from Pools of Different Availability
Phosphorus (P) fixation is a global problem for soil fertility and negatively impacts agricultural productivity. This study characterizes P desorption of already fixed P by using KCl, KNO<sub>3</sub>, histidine, and malic acid as inorganic and organic compounds, which are quite common in...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-05-01
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| Series: | Soil Systems |
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| Online Access: | https://www.mdpi.com/2571-8789/5/2/33 |
| _version_ | 1797533153001209856 |
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| author | Stella Gypser Elisabeth Schütze Dirk Freese |
| author_facet | Stella Gypser Elisabeth Schütze Dirk Freese |
| author_sort | Stella Gypser |
| collection | DOAJ |
| description | Phosphorus (P) fixation is a global problem for soil fertility and negatively impacts agricultural productivity. This study characterizes P desorption of already fixed P by using KCl, KNO<sub>3</sub>, histidine, and malic acid as inorganic and organic compounds, which are quite common in soil. Goethite, gibbsite, and ferrihydrite, as well as hydroxide mixtures with varying Fe- and Al-ratio were selected as model substances of crystalline and amorphous Fe- and Al-hydroxides. Especially two- and multi-component hydroxide systems are common in soils, but they have barely been included in desorption studies. Goethite showed the highest desorption in the range from 70.4 to 81.0%, followed by gibbsite with values in the range from 50.7 to 42.6%. Ferrihydrite had distinctive lower desorption in the range from 11.8 to 1.9%. Within the group of the amorphous Fe-Al-hydroxide mixtures, P desorption was lowest at the balanced mixture ratio for 1 Fe: 1 Al, increased either with increasing Fe or Al amount. Precipitation and steric effects were concluded to be important influencing factors. More P was released by crystalline Fe-hydroxides, and Al-hydroxides of varying crystallinity, but desorption using histidine and malic acid did not substantially influence P desorption compared to inorganic constituents. |
| first_indexed | 2024-03-10T11:10:32Z |
| format | Article |
| id | doaj.art-9a155fde6be1442bb092eb1c580e4982 |
| institution | Directory Open Access Journal |
| issn | 2571-8789 |
| language | English |
| last_indexed | 2024-03-10T11:10:32Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Soil Systems |
| spelling | doaj.art-9a155fde6be1442bb092eb1c580e49822023-11-21T20:50:34ZengMDPI AGSoil Systems2571-87892021-05-01523310.3390/soilsystems5020033Single and Binary Fe- and Al-hydroxides Affect Potential Phosphorus Mobilization and Transfer from Pools of Different AvailabilityStella Gypser0Elisabeth Schütze1Dirk Freese2Department of Soil Protection and Recultivation, Faculty of Environment and Natural Sciences, Brandenburg University of Technology Cottbus-Senftenberg, Konrad-Wachsmann-Allee 6, 03046 Cottbus, GermanyDepartment of Soil Protection and Recultivation, Faculty of Environment and Natural Sciences, Brandenburg University of Technology Cottbus-Senftenberg, Konrad-Wachsmann-Allee 6, 03046 Cottbus, GermanyDepartment of Soil Protection and Recultivation, Faculty of Environment and Natural Sciences, Brandenburg University of Technology Cottbus-Senftenberg, Konrad-Wachsmann-Allee 6, 03046 Cottbus, GermanyPhosphorus (P) fixation is a global problem for soil fertility and negatively impacts agricultural productivity. This study characterizes P desorption of already fixed P by using KCl, KNO<sub>3</sub>, histidine, and malic acid as inorganic and organic compounds, which are quite common in soil. Goethite, gibbsite, and ferrihydrite, as well as hydroxide mixtures with varying Fe- and Al-ratio were selected as model substances of crystalline and amorphous Fe- and Al-hydroxides. Especially two- and multi-component hydroxide systems are common in soils, but they have barely been included in desorption studies. Goethite showed the highest desorption in the range from 70.4 to 81.0%, followed by gibbsite with values in the range from 50.7 to 42.6%. Ferrihydrite had distinctive lower desorption in the range from 11.8 to 1.9%. Within the group of the amorphous Fe-Al-hydroxide mixtures, P desorption was lowest at the balanced mixture ratio for 1 Fe: 1 Al, increased either with increasing Fe or Al amount. Precipitation and steric effects were concluded to be important influencing factors. More P was released by crystalline Fe-hydroxides, and Al-hydroxides of varying crystallinity, but desorption using histidine and malic acid did not substantially influence P desorption compared to inorganic constituents.https://www.mdpi.com/2571-8789/5/2/33phosphorus kineticsdesorptionFe-Al-hydroxide mixtureshistidinemalic acid |
| spellingShingle | Stella Gypser Elisabeth Schütze Dirk Freese Single and Binary Fe- and Al-hydroxides Affect Potential Phosphorus Mobilization and Transfer from Pools of Different Availability Soil Systems phosphorus kinetics desorption Fe-Al-hydroxide mixtures histidine malic acid |
| title | Single and Binary Fe- and Al-hydroxides Affect Potential Phosphorus Mobilization and Transfer from Pools of Different Availability |
| title_full | Single and Binary Fe- and Al-hydroxides Affect Potential Phosphorus Mobilization and Transfer from Pools of Different Availability |
| title_fullStr | Single and Binary Fe- and Al-hydroxides Affect Potential Phosphorus Mobilization and Transfer from Pools of Different Availability |
| title_full_unstemmed | Single and Binary Fe- and Al-hydroxides Affect Potential Phosphorus Mobilization and Transfer from Pools of Different Availability |
| title_short | Single and Binary Fe- and Al-hydroxides Affect Potential Phosphorus Mobilization and Transfer from Pools of Different Availability |
| title_sort | single and binary fe and al hydroxides affect potential phosphorus mobilization and transfer from pools of different availability |
| topic | phosphorus kinetics desorption Fe-Al-hydroxide mixtures histidine malic acid |
| url | https://www.mdpi.com/2571-8789/5/2/33 |
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