área de pesquisa Cibele Sippel Diana Fernanda Caicedo Chaguezac Felipe Pereira da Rocha Linice de Vasconcelos Cavalcante Bonaparte Photocatalytic degradation of ferricyanide as synthetic gold mining wastewater using TiO2 assisted by H2O2 Rodolfo Tolentino-Bisneto Sandra Cecilia Miano Shirlei Aparecida de Oliveira