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PHOSPHORUS ADSORPTION IN VARIOUS SOIL-WATER EXTRACTION CUP MATERIALS
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1984
Year
Soil-water Sample CollectionChemical EngineeringSoil PropertyEngineeringInsignificant AdsorptionSoil ChemistryEnvironmental RemediationWater PurificationWater TreatmentAdsorptionAdsorption TestsWastewater Treatment
We evaluated four different soil-water extractor cup materials to determine the amount of soluble ortho-phosphate adsorbed by the cup during soil-water sample collection. We also determined desorption for selected cups, after equilibrium had been reached, during the adsorption tests. Teflon and the fritted glass extractor cups exhibited insignificant adsorption, but the alundum and Soil-Moisture ceramic cups were found to adsorb and desorb large amounts of phosphorus.1 Acid-washing the cups with 1 N HC1 solution prior to testing significantly increased the amount of adsorption and, to a lesser degree, desorption of phosphorus.