ION-IMPRINTED POLY(NITROSONAPHTOL-FORMALDEHYDE) WITH MAGNETITE CORE FOR PRECONCENTRATION IN CD(II) ION ANALYSIS

• Main Author: RIDHO ARROSYAD (NIM:10514040), ZAENUR
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/31867
• Institution: Institut Teknologi Bandung

Cadmium is a metal that is harmful to the environment because it can not be degraded by microorganisms <br /> <br /> so that when entered in the human body will accumulate. In small quantities, cadmium has toxic effects <br /> <br /> and carcinogenic to the human body. The cadmium content can be analyzed using atomic absorption <br /> <br /> spectrophotometry, but is not sensitive for cadmium in low concentration. The solid phase extraction <br /> <br /> technique for preconcentration using Ion Imprinted Polymer (IIP) can solve that problem. In this research, <br /> <br /> IIP has been synthesized in form of Cd(II)-ion imprinted poly(nitrosonapthole-formaldehyde) with <br /> <br /> magnetite-core (IIPM) for preconcentration of cadmium ions in water. Characterization with infrared <br /> <br /> spectrocopy showed absorption at 3448 cm-1, 1463 cm-1, 1085 cm-1, and 588 cm-1 that indicating the <br /> <br /> presence of functional groups -OH, C-H methylene (-CH2-), -NO, and Fe-O on IIPM. Characterization <br /> <br /> with transmission electron microscopy shows the process of surface imprinting of the polymer on the <br /> <br /> surface of the magnetite core has been successfully performed. Evaluation of IIPM adsorption parameters <br /> <br /> was done by batch method and showed that IIPM worked optimally at pH 5 with 20 minutes of contact <br /> <br /> time. IIPM has a maximum adsorption capacity at 9.06 mg/g by following the pseudo second order <br /> <br /> adsorption kinetics and Langmuir adsorption isotherm. IIPM is shown to be selective against Cd(II) ions <br /> <br /> in the presence of Zn(II) and Pb(II) ions because they have S>1 values and are not selective in the <br /> <br /> presence of Cu(II) ions. The adsorption-desorption process provides a recovery value of about 100% with <br /> <br /> preconcentration or without preconcentration. IIPM was applied for analysis of Cd(II) ion content in river <br /> <br /> water samples and found that Cd(II) ion content in river water was 51.39 ppb.