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Published in J Environ Qual 9:405-407 (1980)
© 1980 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Fractionation of Inorganic Phosphates in Calcareous Sediments1

Arnold H. M. Hieltjes and Lambertus Lijklema2

ABSTRACT

The selectivity of current fractionation schemes for inorganic phosphates in sediments has been tested on pure compounds. Results indicate that effective removal of calcium carbonate through ammonium chloride extraction is necessary in order to achieve satisfactory discrimination between iron- or aluminum-bound phosphates and calcium phosphates. A simple extraction procedure based on this information has been applied to the sediments of Lake Brielle.

Key Words: sediment phosphate • phosphate extraction • sorption on calcium carbonate

NOTES

1 Contribution of the Dept. of Chemical Engineering, Twente Univ. of Technology, P.O. Box 217, Enschede, The Netherlands.

2 Research Assistant and Assoc. Prof. of Environmental Engineering, respectively.

Received for publication November 19, 1979.


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