Perfluorooctane sulfonic acid (PFOS) degradation by optimized heterogeneous photocatalysis (TiO2/UV) using the response surface methodology (RSM) - Furtado, Rafaely Ximenes de Sousa; Sabatini, Carolina Aparecida; Zaiat, Marcelo; Azevedo, Eduardo Bessa (Journal of Water Processing Engineering, 2021)