Validation of soil phosphate removal by alkaline and acidic reagents in a vertosol soil using XANES spectroscopy

Title
Validation of soil phosphate removal by alkaline and acidic reagents in a vertosol soil using XANES spectroscopy
Publication Date
2015
Author(s)
McLaren, Timothy
Guppy, Christopher
( author )
OrcID: https://orcid.org/0000-0001-7274-607X
Email: cguppy@une.edu.au
UNE Id une-id:cguppy
Tighe, Matthew
Schefe, C R
Flavel, Richard
( author )
OrcID: https://orcid.org/0000-0001-7867-2104
Email: rflavel3@une.edu.au
UNE Id une-id:rflavel3
Cowie, B C C
Tadich, Anton
Type of document
Journal Article
Language
en
Entity Type
Publication
Publisher
Taylor & Francis Inc
Place of publication
United States of America
DOI
10.1080/00103624.2015.1048252
UNE publication id
une:18232
Abstract
There is a paucity of information on the soil phosphorus (P) forms removed by alkaline and acidic reagents in Vertosols. The first aim of this study was to identify which soil phosphates are removed by a two-step sequential fractionation (0.1 M NaOH and 1 M HCl) and by a dilute acid extractant (0.005 M H₂SO₄; Bureau of Sugar Experiment Stations (BSES) soil P test) on an "untreated" Vertosol using P K-edge x-ray absorption near-edge structure (XANES) at the Australian Synchrotron. There was supporting evidence that the 0.1 M sodium hydroxide (NaOH), 1 M hydrochloric acid (HCl), and 0.005M sulfuric acid (H₂SO₄) extractants remove soil phosphates according to the chemical solubility of known P minerals. The XANES spectra revealed the 1 M HCl and 0.005 M H₂SO₄ extractants remove calcium (Ca) phosphates from Vertosols, suggesting the latter extractant could be used as an alternative for a rapid and cost-effective measure of Ca phosphates in Vertosols.
Link
Citation
Communications in Soil Science and Plant Analysis, 46(16), p. 1998-2017
ISSN
0010-3624
1532-2416
Start page
1998
End page
2017

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