FUNCTIONALIZATION OF L-CYSTEINE TO MICROCRYSTALLINE CELLULOSE FROM COTTON SPINNING INDUSTRY WASTE AS ADSORBENT FOR MERCURY (II) ION PRECONCENTRATION IN TEXTILE AND ITS DETERMINATION BY MERCURY ANALYZER
The very high level of metallic mercury toxicity to humans at very low concentrations has led to regulations at the national (SNI) and international (Oeko tex standard 100) levels regarding the permissible content of mercury in textiles. his study aimed to functionalize L-cysteine in microcrystallin...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/62585 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The very high level of metallic mercury toxicity to humans at very low concentrations has led to regulations at the national (SNI) and international (Oeko tex standard 100) levels regarding the permissible content of mercury in textiles. his study aimed to functionalize L-cysteine in microcrystalline cellulose from cotton spinning industrial waste as an adsorbent for mercury preconcentration from textile matrices and to determine its determination using a mercury analyzer. In this study, microcrystalline cellulose was synthesized from cotton waste in the cotton spinning industry, then grafted with L-cysteine. The characterizations that have been carried out include analysis of XRD, FTIR, and SEM-EDS. Furthermore, the adsorption and preconcentration conditions of mercury by microcrystalline cellulose-L-cysteine (MCC-L) were carried out using the batch method and determined using a mercury analyzer. In this study, microcrystalline cellulose with an average size (111,79 x 13,39) µm was obtained from cotton waste in the cotton spinning industry. Based on the results of characterization using FTIR and SEM- EDS, mereaksikan of L-cysteine on microcrystalline cellulose has been successfully carried out. The results of mercury adsorption on microcrystalline cellulose-L-cysteine were optimum at pH 5, contact time of 5 minutes, with pseudo-
order adsorption kinetics, Langmuir adsorption isotherm model, 2.5M HNO3 was effective as an eluent, microcrystalline cellulose-L-cysteine selectively adsorbed Hg with the presence of Ni (II) ion. Preconcentration of mercury in polyester fabric samples can be carried out with good analytical performance with a repeatability of 0.8%, recovery of 94.46%, detection limit of 10 ng/L with a preconcentration factor of 10.
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