Mercury contamination in agricultural soils from abandoned metal mines classified by geology and mineralization |
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Authors: | Kim Han Sik Jung Myung Chae |
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Institution: | (1) Catarinense Institute of Environmental Research and Human Development–IPADHC, Capivari de Baixo, Santa Catarina, Brazil |
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Abstract: | The concentrations and loadings of major and trace elements in coal mine drainage (CMD) from 49 abandoned mines located in
the coal fields of the Brazilian state of Santa Catarina were determined. The CMD sites typically displayed a wide spatial
and temporal variability in physical and geochemical conditions. The results of our CMD analyses in Santa Catarina State were
used to illustrate that the geochemical processes in the rock piles can be deduced from multiple data sets. The observed relationship
between the pH and constituent concentrations were attributed to (1) dilution of acidic water by near-neutral or alkaline
groundwater and (2) solubility control of Al, Fe, Mn, Ba and Sr by hydroxide, sulfate, and/or carbonate minerals. The preliminary
results of the CMD analyses and environmental health in the Santa Catarina region, Brazil, are discussed. |
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