XAFS study of adsorbed and mineral forms of phosphate

被引：151

作者：

Hesterberg, D

Zhou, WQ

Hutchison, KJ

Beauchemin, S

Sayers, DE

机构：

[1] N Carolina State Univ, Dept Soil Sci, Raleigh, NC 27695 USA

[2] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA

[3] Agr & Agri Food Canada, St Foy, PQ G1V 2J3, Canada

来源：

JOURNAL OF SYNCHROTRON RADIATION | 1999年 / 6卷

关键词：

XANES; phosphorus; speciation; soil;

D O I：

10.1107/S0909049599000370

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The solubility of inorganic phosphorus in soils is regulated by surface-adsorbed phosphate or phosphate minerals. The objective of this study was to determine whether different phosphate species of relevance to soils showed distinguishing XAFS spectral features. Phosphorus K-XANES spectra for Fe-phosphates were characterized by a unique pre-edge feature near -3 eV (relative energy) that increased in intensity with increasing mineral crystallinity and was very weak for phosphate adsorbed on goethite. Spectra of Ca-phosphates and a soil sample exhibited a distinct shoulder on the high-energy side of the absorption edge. Spectra of Al-phosphates were characterized by a weak pre-edge feature at -1 eV.

引用

页码：636 / 638

页数：3

共 12 条

[1] Phosphorus sorption-desorption kinetics of soil under contrasting land uses [J].

Beauchemin, S ;

Simard, RR ;

Cluis, D .

JOURNAL OF ENVIRONMENTAL QUALITY, 1996, 25 (06) :1317-1325

[2] A CONTRIBUTION TO THE UNDERSTANDING OF THE FORMATION OF CALCIUM PHOSPHATES [J].

CHRISTOFFERSEN, J ;

CHRISTOFFERSEN, MR ;

KIBALCZYC, W ;

ANDERSEN, FA .

JOURNAL OF CRYSTAL GROWTH, 1989, 94 (03) :767-777

[3] THE CRYSTALLIZATION OF FERRIC PHOSPHATE ON CELLULOSE [J].

DALAS, E .

JOURNAL OF CRYSTAL GROWTH, 1991, 113 (1-2) :140-146

[4] EFFECTS OF ALUMINUM AND PHOSPHATE CONCENTRATIONS AND ACIDITY ON THE CRYSTALLIZATION OF VARISCITE AT 90-DEGREES-C [J].

HSU, PH ;

SIKORA, F .

SOIL SCIENCE, 1993, 156 (02) :71-78

[5] PHOSPHORUS AVAILABILITY AND SORPTION IN AN ATLANTIC COASTAL-PLAIN WATERSHED DOMINATED BY ANIMAL-BASED AGRICULTURE [J].

MOZAFFARI, M ;

SIMS, JT .

SOIL SCIENCE, 1994, 157 (02) :97-107

[6]

OH YM, 1999, IN PRESS COMMUN SOIL

[7]

Sample E. C., 1980, Khasawneh, F. E.

[8]

Sample, E. C.

[9]

Kamprath, E. J. : The role of phosphorus in agriculture. (Proceedings of a symposium held 1-3 June 1976 at the National Fertilizer Development Center, Tennessee Valley Authority, Muscle Shoals, Alabama)., P263

[10]

Sayers D. E., 1988, XRAY ABSORPTION PRIN, V92, P211

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