1. Postgraduate Program in Chemical Engineering School of Science and Technology Universidade Federal do Rio Grande do Norte Campus Universitário Lagoa Nova 59078-970 Natal/RN Brazil
2. Faculty of Chemical Sciences & Technologies Department of Chemical Engineering Universidad de Castilla La Mancha Campus Universitario, s/n 13071 Ciudad Real Spain
3. Geoenvironmental Group Civil Engineering School Universidad de Castilla La Mancha Avda. Camilo José Cela s/n 13071 Ciudad Real Spain