Affiliation: | 1.Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, P.O. Box 1294, Belo Horizonte, MG, 30.270-901, Brazil ;2.Research and Development Center of PETROBRAS S.A/CENPES, P.O. Box 68505, Rio de Janeiro, RJ, 21941-915, Brazil ;3.Chemistry Department, Federal Center of Technological Education of Minas Gerais, Belo Horizonte, MG, 30.421-169, Brazil ; |