SYNTHESIS OF MAGNETITE CORE CD(II)-IMPRINTED POLYMERS FOR CD(II) ION PRECONCENTRATION

• Main Author: ANANDHYTA (NIM : 10510030) ;Pembimbing Prof. Dr. Muhammad Bachri Amran, DEA , NUNGKY
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/19080
• Institution: Institut Teknologi Bandung

The presence of heavy metal has been a serious environmental problem. Based on chemical <br /> <br /> <br /> <br /> <br /> properties and contamination level of that heavy metal, it is possible to occur a negative <br /> <br /> <br /> <br /> <br /> impact to the ecosystem, neither water ecosystem nor human ecosystem. Many experiments <br /> <br /> <br /> <br /> <br /> have been focused to an invention of this contaminant analysis and preparation method, such <br /> <br /> <br /> <br /> <br /> as precipitation, reduction, liquid extraction, ultrafiltration, ion exchange, adsorbtion, etc. <br /> <br /> <br /> <br /> <br /> The most important problem is, the composition of that heavy metal is only a little amount in <br /> <br /> <br /> <br /> <br /> contained in nature (&#956;g.L-1 level). Ion imprinted polymers is a sensitive, selective fungsional <br /> <br /> <br /> <br /> <br /> materials and capable to use as solver for problem described. This preconcentration method <br /> <br /> <br /> <br /> <br /> is based on solid phase extraction. IIP has an ability to combine with magnetic particle to <br /> <br /> <br /> <br /> <br /> simplify the solid separation process from sample solution. In this experiment, Cd(II)- <br /> <br /> <br /> <br /> <br /> imprinted polymers was synthesized using salicylic acid as monomer and formaldehyde as <br /> <br /> <br /> <br /> <br /> crosslinker, and Cd(II)-4-(2-pyridylazo) resocinol complex in stoichiometric comparison 1:1. <br /> <br /> <br /> <br /> <br /> Magnetite was synthesized using co-precipitation method. Synthesis this magnetite core <br /> <br /> <br /> <br /> <br /> polymers was carried out with thermal method, stiring salicylic acid, formaldehyde, Cd(II)- <br /> <br /> <br /> <br /> <br /> 4-(2-pyridylazo) resocinol complex, and magnetite, heating for 10 hours at 140 °C using HCl <br /> <br /> <br /> <br /> <br /> 2 M as catalyst. Resulting polymers was characterized using FTIR to determine formation of <br /> <br /> <br /> <br /> <br /> polymers and releasing process of Cd(II) ions. Retention properties of Cd(II)-imprinted <br /> <br /> <br /> <br /> <br /> polymers was characterized by using Batch method. The result showed that the optimum <br /> <br /> <br /> <br /> <br /> capacity of that polymer for adsorpting Cd(II) was 8,92 mg/g at pH 5 with contact time of 5 <br /> <br /> <br /> <br /> <br /> minutes. Retention Cd(II) ions followed both types of adsorption isoterm, Langmuir and <br /> <br /> <br /> <br /> <br /> Freundlich with &#916;G value is -16,211 kJ/mol. &#916;G value shows that the adsorption process was <br /> <br /> <br /> <br /> <br /> spontaneous, exotherm, and implied in weak chemical adsorption. Relative selectivity value <br /> <br /> <br /> <br /> <br /> for Pb(II), Zn(II), and Cu(II) was 1,226 ; 2,206 ; 1,668. The values indicated that magnetite <br /> <br /> <br /> <br /> <br /> core Cd(II)-imprinted polymers is selective for Cd(II) ions.