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vol. 8, nr. 1 (2006)
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Effect of phosphate at different concentration on release of humic acids from mucks
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Dorota Matyka-Sarzyńska, Zofia Sokołowska
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Institute of Agrophysics of the Polish Academy of Science, ul. Doświadczalna 4, 20-290 Lublin |
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vol. 8 (2006), nr. 1,
pp. 181-190
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abstract:
The study was conducted on five muck samples. Humic acids (HA) were extracted from mucks by the Schnitzer method. Calcium forms of extracted humic substances were treated with Na2HPO4 solutions at increasing concentrations. Concentrations of released HA were determined at 470 nm. At low, initial, phosphate concentration additional coagulation of HA from solution was observed. Generally, the amount of released organic matter was found to increase with the state of secondary transformation.
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keywords:
mucks, phosphate, humic acids, stage of secondary transformation
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original in:
Polish
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