Stepwise redox changes alter the speciation and mobilization of phosphorus in hydromorphic soils

Sabry M Shaheen; Jianxu Wang; Karen Baumann; Ashour A Ahmed; Liang-Ching Hsu; Yu-Ting Liu; Shan-Li Wang; Oliver Kühn; Peter Leinweber; Jörg Rinklebe

doi:10.1016/j.chemosphere.2021.132652

Stepwise redox changes alter the speciation and mobilization of phosphorus in hydromorphic soils

Chemosphere. 2022 Feb;288(Pt 3):132652. doi: 10.1016/j.chemosphere.2021.132652. Epub 2021 Oct 22.

Authors

Affiliations

¹ University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285, Wuppertal, Germany; King Abdulaziz University, Faculty of Meteorology, Environment, and Arid Land Agriculture, Department of Arid Land Agriculture, Jeddah, 21589, Saudi Arabia; University of Kafrelsheikh, Faculty of Agriculture, Department of Soil and Water Sciences, 33 516, Kafr El-Sheikh, Egypt. Electronic address: shaheen@uni-wuppertal.de.
² University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285, Wuppertal, Germany; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550082, Guiyang, PR China.
³ University of Rostock, Faculty of Agricultural and Environmental Science, Soil Sciences, Justus-von-Liebig-Weg 6, 18051, Rostock, Germany.
⁴ University of Rostock, Institute of Physics, D-18059, Rostock, Albert-Einstein-Str. 23-24, Germany; University of Rostock, Department of Life, Light, and Matter (LLM), Albert-Einstein-Str. 25, D-18059, Rostock, Germany.
⁵ Department of Soil and Environmental Sciences, National Chung-Hsing University, 145 Xingda Rd., Taichung, 402, Taiwan.
⁶ Department of Soil and Environmental Sciences & Innovation and Development Center of Sustainable Agriculture, National Chung-Hsing University, 145 Xingda Rd., Taichung, 402, Taiwan.
⁷ Department of Agricultural Chemistry, National Taiwan University, 1 Sect. 4, Roosevelt Rd., Taipei, 10617, Taiwan.
⁸ University of Rostock, Faculty of Agricultural and Environmental Science, Soil Sciences, Justus-von-Liebig-Weg 6, 18051, Rostock, Germany; University of Rostock, Department of Life, Light, and Matter (LLM), Albert-Einstein-Str. 25, D-18059, Rostock, Germany.
⁹ University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285, Wuppertal, Germany; University of Sejong, Department of Environment, Energy and Geoinformatics, Guangjin-Gu, Seoul, 05006, Republic of Korea. Electronic address: rinklebe@uni-wuppertal.de.

PMID: 34695481
DOI: 10.1016/j.chemosphere.2021.132652

Abstract

Sustainable engineering and management of hydromorphic arable soils need deep knowledge about the redox-mediated interactions between nutrients and soil colloids. Consequently, we examined the redox-mediated interactions of P with metal oxides and organic carbon (OC) in toe-, mid-, and upper-slope arable soils under dynamic redox changes using geochemical (biogeochemical microcosm), spectroscopic (XANES), and molecular (quantum chemical calculations (QCC)) approaches. We controlled the redox potential (E_H) in two directions i.e., 1) slowly oxidizing direction (SOD; E_H increased from -286 to +564 mV); and 2) slowly reducing direction (SRD; E_H decreased from +564 to -148 mV). In the SOD of all soils, P, Fe²⁺ and OC mobilized at E_H ≤ 200 mV, due to the pH decrease from 7.2 to 4.1 and dissolution of Fe-oxyhydroxides/carbonates, as indicated by the decrease of Fe-P and Ca-P determined by P-K-edge-XANES. At E_H > 200 mV, P immobilized due to the strong P binding with Fe³⁺ as suggested by QCC. In the SRD of mid-slope-soil, P immobilized with decreasing E_H, due to pH increase and P retention by aromatic carbon and/or precipitation by carbonates, as supported by increase of organic-P and Ca-P. These findings help for management of P in arable soils.

Keywords: Hydromorphic arable soils; Phosphorus loss; Quantum chemical calculations; Sustainable management; XANES.

MeSH terms

Oxidation-Reduction
Oxides
Phosphorus
Soil Pollutants* / analysis
Soil*

Substances

Oxides
Soil
Soil Pollutants
Phosphorus