PENENTUAN KONSTANTA LAJU ADSORPSI ION LOGAM Cd(II) PADA KITOSAN BEAD DAN KITOSAN-SILIKA BEAD (DETERMINATION OF ADSORPTION RATE CONSTANT OF Cd(II) METAL ION ON CHITOSAN BEAD AND CHITOSAN-SILICA BEAD) - ATUL MAHMUDAH, RIFA Atul (UNESA Journal of Chemistry, 2013)