POLY(RESORCINOL-FORMALDEHYDE) WITH MAGNETITE CORE FOR PRECONCENTRATION AND ANALYSIS OF CD(II) USING ATOMIC ABSORPTION SPECTROMETRY

• Main Author: BANYU FIRDAUS SOERIAWIDJAJA ( NIM : 10512043 ), RADEN
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/23761
• Institution: Institut Teknologi Bandung

Cadmium is a heavy metal with high toxicity level for human even in small amount. Cadmium level can be analysed using Atomic Absorption Spectrophotometry, but this instrument have a low sensitivity for cadmium analysis in trace amount. Solid phase extraction technique for preconcentration using Ion Imprinted Polymer could handle this problem. In this research, Cadmium Imprinted Poly(Resorcinol-Formaldehyde) with magnetite core (Cd-IPM) for cadmium ion preconcentration have been successfully synthesized. FT-IR characterization of Cd-IPM shows the presence of OH functional group, aromatic ring, and Fe-O bond. Further characterization using SEM-EDS proves that Cd-IPM have the ability to adsorb and release Cd2+. Optimization of Cd-IPM are done using batch method, and results in an optimal pH of 5 and optimal contact time of 35 minutes. Cd-IPM’s maximum adsorption capacity is 47.50 mg Cd2+/g adsorbent, and follows the Langmuir isotherm adsorption model, with Qmax of 49.51 mg Cd2+/g adsorbent. Cd-IPM is selective for Cd2+, with S value against Cu2+, Zn2+, and Pb2+ are 1.19, 3.24, and 2.02 in corresponding order. It has a recovery percentage of 98.59±0.07% without concentration factor and 94.21±0.48% for 4x concentration factor. Sample analysis have successfully carried out using 4x concentration factor, and resulted in 18.12 ppb Cd2+.