Abstract
Ninety-one ground water samples (predominantly from springs) in two mineralized areas of the Ouachita Mountains in west-central Arkansas, were analyzed for Fe, Mn, Zn, Cu, Co, Ni, Pb, Hg, Sb, Sr, Ba, Ca, and Li. These areas contain Mn, barite, strontianite, cinnabar, stibnite and scattered Pb-Zn mineralization, Cumulative frequency curves were used to determine the threshold and anomalous concentrations for each element in the two areas. These values were, in general, higher in the ground water from the more mineralized area for several of the base metals, but most notably for Mn and Fe, the principal metals in the Mn oxide minerals.
The United States Environmental Protection Agency (EPA, 1976) criteria for Fe (300 μg L −1) and Mn (50 μg L−1) in drinking water were exceeded, respectively, in 34% and 30% of the springs in Area I, and 13% and 23% in Area II. One spring exceeded the EPA Hg criterion (2 μg L−1) and 3 springs exceeded the 50 μg L−1 criterion for Pb. In spite of the large number of anomalous Ba concentrations, the highest concentration of Ba was 930 μg L−1 (EPA criterion 1000 μg L −1).
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Wagner, G.H., Steele, K.F. Metal concentrations in the ground water of the Ouachita Mountains, Arkansas, U.S.A.. Water Air Soil Pollut 25, 339–347 (1985). https://doi.org/10.1007/BF00208460
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DOI: https://doi.org/10.1007/BF00208460