A preliminary study of coal mining drainage and environmental health in the Santa Catarina region, Brazil
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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.
KeywordsBrazilian coal mining Coal mine drainage Drainage management Environmental impacts
This work was conducted by FEHIDRO and Environmental Foundation of Santa Catarina State (FATMA). We are grateful to Mr. Frans Waanders, R.B. Finkelman, Cidnei Galvani, Rui, Fernando A.R. Guedes, and Marcio Pink and for invaluable collaboration in the structural work. BASF, S.A. (Brazilian) conducted most of the chemical analyses (in special management, Bruno Sina). The authors acknowledge logistical support from the coal mining companies (access to samples).
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