Antibacterial Inactivation of Escherichia coli after TiO2-Fe3O4-Bentonite Photocatalytic Treatment - Widi, Restu Kartiko; Chemical Engineering Department, University of Surabaya, Raya Kalirungkut Tenggilis, Surabaya, 60290, Indonesia (International Journal on Advanced Science, Engineering and Information Technology, 2018)