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Micro and nano sized particles in leachates from agricultural soils: Phosphorus and sulfur speciation by X-ray micro-spectroscopy

Adediran, Gbotemi and Lundberg, Daniel and Almkvist, Gunnar and del Real, Ana E. Pradas and Klysubun, Wantana and Hillier, Stephen and Gustafsson, Jon Petter and Simonsson, Magnus (2021). Micro and nano sized particles in leachates from agricultural soils: Phosphorus and sulfur speciation by X-ray micro-spectroscopy. Water Research. 189 , 116585
[Research article]

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Abstract

Colloids and nanoparticles leached from agricultural land are major carriers of potentially bioavailable nutrients with high mobility in the environment. Despite significant research efforts, accurate knowledge of macronutrients in colloids and nanoparticles is limited. We used multi-elemental synchrotron X-ray fluorescence (XRF) microscopy with multivariate spatial analysis and X-ray atomic absorption near-edge structure (XANES) spectroscopy at the P and S K-edges, to study the speciation of P and S in two fractions of leached particles, >0.45 and <0.45 mu m respectively, collected from four tile-drained agricultural sites in Sweden. P K-edge XANES showed that organic P, followed by P adsorbed to surfaces of aluminum-bearing particles were the most common forms of leached P. Iron-bound P (Fe-P) forms were generally less abundant (0-30 % of the total P). S K-edge XANES showed that S was predominantly organic, and a relatively high abundance of reduced S species suggests that redox conditions were adverse to the persistence of P bound to Fe-bearing colloids in the leachates. Acid ammonium-oxalate extractions suggested that P associated with Al and Fe (Al-P and Fe-P) in most cases could be explained by the adsorption capacity of non-crystalline (oxalate-extractable) oxides of Al and Fe. These results improve our understanding of particulate P and S speciation in the vadose zone and helps in developing effective technologies for mitigating colloidal driven eutrophication of water bodies near agricultural land. (C) 2020 The Author(s). Published by Elsevier Ltd.

Authors/Creators:Adediran, Gbotemi and Lundberg, Daniel and Almkvist, Gunnar and del Real, Ana E. Pradas and Klysubun, Wantana and Hillier, Stephen and Gustafsson, Jon Petter and Simonsson, Magnus
Title:Micro and nano sized particles in leachates from agricultural soils: Phosphorus and sulfur speciation by X-ray micro-spectroscopy
Series Name/Journal:Water Research
Year of publishing :2021
Volume:189
Article number:116585
Number of Pages:15
Publisher:PERGAMON-ELSEVIER SCIENCE LTD
ISSN:0043-1354
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Soil Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Keywords:Leachates, Colloids, Nanoparticles, Phosphorus, Sulfur, Speciation
URN:NBN:urn:nbn:se:slu:epsilon-p-110421
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-110421
Additional ID:
Type of IDID
DOI10.1016/j.watres.2020.116585
Web of Science (WoS)000605625800001
ID Code:23401
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment

(NL, NJ) > Department of Molecular Sciences
Deposited By: SLUpub Connector
Deposited On:03 May 2021 19:43
Metadata Last Modified:04 May 2021 05:01

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