BIOADSORPSI Hg(II) OLEH PATI SAGU TAUT SILANG FOSFAT [Bioadsorption of Hg(II) by Crosslinked Sago Starch Phosphate]

Jorion Romengga (Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Tanjungpura, Pontianak)
Tun Tedja Irawadi (Departemen Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Bogor)
Sr Sugiarti (Departemen Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Bogor)

Jurnal Teknologi Dan Industri Pangan
Vol. 23 No. 2 (2012): Jurnal Teknologi dan Industri Pangan

Crosslinked-sago-starch-phosphate (SgP) has been successfully synthesized from native sago starch (Sg) and Na2HPO4-NaH2PO4 in an acidic condition. The compound was designed as bioadsorbent for removing Hg(II) inside human digestion tract as shown by in vitro test. The bioadsorption followed pseudo-second order of reaction kinetic and Freundlich equation as chemisorption. As a result, 21% of Hg(II) was removed at pH of 6.80 and reached the isothermal equilibrium of the bioadsorption at pH of 5.80 and 8.60 for 29.95% and 31.39%, respectively. The result showed that SgP is more feasible than activated carbon to be used as bioadsorbent in removing Hg(II) in human digestion tract as proved by in vitro system.