POLYTHIOSALISILAT AS METAL ION IMPRINTED POLYMERS FOR Pb(II) IONS
Industrialization produce useful products and also produce waste for the environment. Industrial waste is usually as contamination of heavy metal ions or other compounds. Pb, Hg, Cd, Cu and Zn ions is the primary pollutants in the environment which is have high toxicity. Handling and incorrect use o...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/34425 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Industrialization produce useful products and also produce waste for the environment. Industrial waste is usually as contamination of heavy metal ions or other compounds. Pb, Hg, Cd, Cu and Zn ions is the primary pollutants in the environment which is have high toxicity. Handling and incorrect use of the heavy metal ions would have a negative effect. Of some of the metal ions, Pb(II) ions is one that gets priority treatment. Development of analytical methods for Pb(II) ions have been carried out, but the presence of Pb(II) ions in the trace element is still a main obstacle. Several methods have been carried out to overcome these obstacles are liquid-liquid extraction, ion exchange, adsorption and solid phase extraction (SPE). Development of solid phase extraction method for increasing the selectivity done continuously, either by solvent impregnated resin (SIR), chelating resin and with the functionalization of polymers as ion imprinted polymers (IIPs). In this research has been successfully synthesized Pb (II)-imprinted polymers (Pb- IPs) through the polymerization of thiosalicylic acid and formaldehyde in the presence of metal complexes of Pb (II)-4-(2-pyridylazo) resorcinol. Stoichiometric ratio for binary complex of Pb and 4-(2-pyridylazo) resorcinol determined using Job’s method and the stoichiometric ratio for Pb-PAR complex are 1:1. Synthesis of Pb (II)-imprinted polymer was carried out with the thermal method, heating for 10 hours at a temperature of 140 ± 10 °C with HCl 1M as catalyst. Resulting polymer were washed with aqua dm then dried in an oven at a
temperature of 50oC. Pb-IPs grinded to 60-100 mesh size and functional groups of
synthesized polymers were characterized the by FTIR. Pb (II) on Pb(II)-IPs can be removed with a solution of EDTA 0,05 M. Pb-IPs who have leached then characterized the retention properties by batch method. Retention properties were characterized include contact time and optimum pH, adsorption capacity, competitive adsorption, and preconcentration factor for application in environment sample. The maximum adsorption capacity for Pb (II) was 32,5 mg/g at pH 6 with a contact time of 40 minutes. Value of relative selectivity factor (?r) for Pb (II) / Cu (II), Pb (II) / Zn (II), and Pb (II) / Cd (II) are 1,34 , 1,79 and 1,26, respectively. The value of selectivity factor show that Pb-IPs can be used to
retetion ions Pb (II) despite the presence of other metal ions. Pb-IPs that has been developed also used for preconcentration of Pb (II) in river water samples before analysis by atomic absorption spectrometry method. The obtained preconcentration factor is 17 times and concentrations of Pb (II) in samples of
1,44 ppm with the percent recovery of 99,6 %. Value of preconcentration factor and percent recovery obtained show that synthesized Pb-IPs is enough to be used for trace analysis Pb(II) ions.
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