STUDI ADSORPSI LOGAM Pb(II) PADA MEMBRAN MAKROPORI KITOSAN-KARAGINAN TERTAUT-SILANG GLUTARALDEHIDA; STUDY ADSORPTION OF Pb(II) BY MACROPOROUS MEMBRANE CHITOSAN-CARRAGEENAN CROSSLINKED GLUTARALDEHYDE

Hadi, Sofan, Dwi Siswanta

2015 | Skripsi | FMIPA

Study adsorption of Pb(II) by macroporous chitosan-carrageenan glutaraldehyde crosslinked membrane was conducted. This research was aimed to investigate the adsorption capacity of chitosan-carrageenan with silica as porous crosslinked glutaraldehyde. Chitosan-carrageenan macroporous membrane was first prepared and characterized by Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscope (SEM). The composition of chitosan-carrageenan, amount of silica in the membrane, contact time, pH and initial concentration were varied to study the membrane adsorption. The desorption was investigated by sequential method. The result showed the adsorption percentage by macroporous membrane was 32.18 mg/g whereas by the non-pore membrane was 23.38 mg/g. The optimum pH was 4 with 60 min contact time and the initial concentration was 700 ppm for every 40 mg of membrane macroporous in 20 mL Pb (II) solution. The reaction was following pseudo-second order reaction and the rate constant was 1.8x10-2 g mg-1 min-1. The adsorption isotherm was agreed with Freundlich isotherm and the adsorption capacity of experiment was 138.5 mg/g. The desorption result shows that the interaction of Pb(II) and chitosan carrageenan macropores membrane is dominated by trapped interaction, hydrogen bonding formation and complex formation.

Kata Kunci : chitosan; carrageenan; polyelectrolyte complex; macroporous, SiO2; lead(II)