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Published in J Environ Qual 6:7-12 (1977)
© 1977 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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Phosphates in Soils Treated with Sewage Water: II. Fractionation of Accumulated Phosphates1

J. Beek, F. A. M. de Haan and W. H. van Riemsdijk2

ABSTRACT

Surface flooding of a sandy soil with raw domestic sewage water induced an accumulation of phosphates in the top 50-cm layers. Evaluation of the waste disposal system and development of model considerations on phosphate behavior in soil require information on the different chemical forms in which the accumulated phosphates prevail. Three different soil phosphorus fractionation methods described in literature have been applied to samples of different soil layers. Two soil treatments were involved, viz., 30 and 50 years sewage water flooding. Accumulated phosphates mainly consisted of inorganic phosphate forms (80 to 85%). These inorganic phosphates are constituted particularly of aluminum-bound phosphates; thus, indicating the dominant role of aluminum-related reactions in the phosphate-bonding mechanism in this case.

Key Words: land disposal • soil phosphorus fractionation methods • inorganic soil phosphates • organic soil phosphates • aluminum-bound phosphates • phosphate bonding mechanism in soil

NOTES

1 Contribution from the Lab. of Soils and Fert., Agric. State Univ., 3 De Dreyen, Wageningen, the Netherlands. Support in part by the Comm. on Manure and Odour Problems in Animal Husbandry is gratefully acknowledged.

2 Soil Scientists and Chemist, respectively. The second author is also guest coworker of the Inst. for Land and Water Manage. Res., 11 Prinses Marijkeweg, Wageningen, the Netherlands.

Received for publication November 6, 1975.




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Copyright © 1977 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.