Abstract
The results of this work show:
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1.
Pb+2 is rapidly immobilized from aqueous solutions using calcite or aragonite, CaCO3, and the Pb+2 is precipitated as PbCO3 (cerussite) on the surface of the CaCO3 (the Pb+2-CaCO3 phases),
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2.
using CaCO3, the concentration of Pb+2 in certain solutions can be reduced below environmentally tolerated concentrations, and
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3.
organics present in solutions and natural waters can mobilize Pb+2 from Pb+2-calcite phases; with effluent waters from a paper factory, and 1:1 Ca+2-EDTA being more effective than lignin sulfonates, 1:1 Ca+2-tartrate, soap, detergent, water from a sewage treatment plant, and ordinary river water.
Zusammenfassung
Die Ergebnisse dieser Arbeit zeigen, daß:
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1.
Pb+2 aus wäßrigen Lösungen mit Calcit oder Aragonit, CaCO3, rasch entfernt werden kann, wobei Pb+2 also PbCO3 (Cerussit) an der Oberfläche von CaCO3 (den Pb+2-CaCO3-Phasen) niedergeschlagen wird,
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2.
sich die Pb+2-Konzentration in bestimmten Lösungen mit CaCO3 unter die nach Ö-Norm erlaubte Grenze senken läßt,
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3.
organische Substanzen in wäßrigen Lösungen und natürlichen Wässern zunächst in Pb+2-Calcit-Phasen fixiertes Pb+2 wieder mobilisieren können, wobei die Abwässer einer Papierfabrik und 1:1 Ca+2-EDTA stärker wirken als Ligninsulfonate, 1:1 Ca+2-Tartrat, Seife, Waschmittel, Wasser einer Kläranlage und gewöhnliches Flußwasser.
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Fulbright Professor, Institut für Physikalische Chemie, Montanuniversität Leoben, A-8700 Leoben, Austria, 1982–1983.
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Gamsjäger, H., Fluch, A. & Swinehart, J.H. The effect of potential aqueous pollutants on the solubility of Pb+2 in cerussite—Calcite phase. Monatsh Chem 115, 251–259 (1984). https://doi.org/10.1007/BF00798797
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DOI: https://doi.org/10.1007/BF00798797