Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/121364
Title: IDENTIFICATION AND QUANTIFICATION OF IONIC POLLUTANTS IN ENVIRONMENTAL WATER
Authors: TEH HUI BOON
Keywords: heavy metals, ionic pollutants, disinfection byproducts, sensor, ion chromatography
Issue Date: 22-Jan-2015
Citation: TEH HUI BOON (2015-01-22). IDENTIFICATION AND QUANTIFICATION OF IONIC POLLUTANTS IN ENVIRONMENTAL WATER. ScholarBank@NUS Repository.
Abstract: This dissertation depicts research efforts aimed at developing analytical methods for the determination of both cationic and anionic pollutants in environmental water. In chapter 2, a DNA-based molecular beacon fluorescent sensor was demonstrated for the detection of a cationic pollutant, namely Hg2+, with tunable detection range. This sensor can easily detect Hg2+ in the presence of other metal ions. It is potentially useful for on-site detection in environmental applications involving different concentration ranges. In chapter 3, a label-free DNAzyme-based quartz crystal microbalance biosensor, with oligonucleotide-functionalized gold nanoparticles-enhancement, was demonstrated for detection of another cationic pollutant, i.e. Pb2+. This biosensor showed high selectivity toward Pb2+ ions. The detection strategy would provide an opportunity for ?pollution-free? and on-line detection of metal ions in water. In chapter 4, a highly sensitive two-dimensional ion chromatography (IC) method was demonstrated for detection of anionic disinfection by-products. This method is fully automated, which would allow for high throughput analysis of disinfection by-products by IC with minimal intervention by operator.
URI: http://scholarbank.nus.edu.sg/handle/10635/121364
Appears in Collections:Ph.D Theses (Open)

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