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https://scholarbank.nus.edu.sg/handle/10635/175661
Title: | CHEMICAL COMPOSITION OF RAINWATER IN SINGAPORE | Authors: | A. REGINA BEGUM | Keywords: | Precipitation Wet deposition Acid rain Biomass burning Air pollution Atmospheric transport |
Issue Date: | 1999 | Citation: | A. REGINA BEGUM (1999). CHEMICAL COMPOSITION OF RAINWATER IN SINGAPORE. ScholarBank@NUS Repository. | Abstract: | The chemical composition of rainwater in Singapore was investigated from July to December 1997. Sampling was done on the rooftop of a building at the NUS campus using a wet only automated rainwater collector. Conductivity, pH, major anions and cations of the samples were determined. The ionic balance was calculated. It was found that more than 90% of the precipitation was acidic, with a mean pH of 4.56. The acidity was mainly due to H2SO4, HNO3 and HCl, and the major neutralising cations for these acids were Ca2+ and NH4+. The concentrations of most of the ions in rainwater were measured during the dry season (August-October 1997) and were influenced by biomass burning in Indonesia, which effected the regional air quality. The inter-element relationships among major anions and cations were examined. | URI: | https://scholarbank.nus.edu.sg/handle/10635/175661 |
Appears in Collections: | Master's Theses (Restricted) |
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