Characterization of Colloidal Phosphorus Species in Drainage Waters from a Clay Soil Using Asymmetric Flow Field-Flow Fractionation
| Autor: | I.C. Regelink, Liping Weng, Gerwin F. Koopmans, Caroline van der Salm, Willem H. van Riemsdijk |
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| Rok vydání: | 2013 |
| Předmět: |
separation
Bodemscheikunde en Chemische Bodemkwaliteit Environmental Engineering surface runoff environmental-samples netherlands Soil science Fractionation Management Monitoring Policy and Law complex mixtures Grassland Soil phosphate adsorption Water Movements Animals Soil Pollutants sandy soils Duurzaam Bodemgebruik Drainage Waste Management and Disposal Water Science and Technology Sustainable Soil Use organic phosphorus geography geography.geographical_feature_category Integraal water-en stroomgeb.management Water Phosphorus minerals Pollution Manure Asymmetric flow field flow fractionation manure transport Trench Environmental science Surface runoff Eutrophication Soil Chemistry and Chemical Soil Quality |
| Zdroj: | Journal of Environmental Quality 42 (2013) 2 Journal of Environmental Quality, 42(2), 464-473 |
| ISSN: | 0047-2425 |
| DOI: | 10.2134/jeq2012.0322 |
| Popis: | Phosphorus transport from agricultural land contributes to eutrophication of surface waters. Pipe drain and trench waters from a grassland field on a heavy clay soil in the Netherlands were sampled before and after manure application. Phosphorus speciation was analyzed by physicochemical P fractionation, and the colloidal P fraction in the dissolved fraction (0.45 μm) was analyzed by asymmetric flow field-flow fractionation (AF4) coupled to high-resolution inductively coupled plasma-mass spectrometry and ultraviolet diode array detector. When no manure was applied for almost 7 mo, total P (TP) concentrations were low (21 μmol L), and TP was almost evenly distributed among dissolved reactive P (DRP), dissolved unreactive P (DUP), and particulate P (PP). Total P concentrations increased by a factor of 60 and 4 when rainfall followed shortly after application of cattle slurry or its solid fraction, respectively. Under these conditions, DRP contributed 50% or more to TP. The P speciation within the DUP and PP fractions varied among the different sampling times. Phosphorus associated with dissolved organic matter, probably via cation bridging, comprised a small fraction of DUP at all sampling times. Colloidal P coeluted with clay particles when P application was withheld for almost 7 mo and after application of the solid cattle slurry fraction. At these sampling times, PP correlated well with particulate Fe, Al, and Si, indicating that P is associated with colloidal clay particles. After cattle slurry application, part of DUP was probably present as phospholipids. Physicochemical fractionation combined with AF4 analysis is a promising tool to unravel the speciation of colloidal P in environmental water samples. |
| Databáze: | OpenAIRE |
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