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Surface Ocean and Lower Atmosphere Study—Air-Sea interactions and their climatic and environmental impacts
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Composition of surfactants in sea-surface microlayer, sub-surface water and atmospheric aerosols in selected coastal areas in Peninsular Malaysia
Wednesday 9th @ 1410-1430, Conference Room 7
Mohd Talib Latif* , School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Royston Uning, School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Suhana Shaharom, School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Kai Ling Yu, School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Sze Yin Cheng, School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Mohd Talib Latif,
Presenter Email: talib@ukm.edu.my |
| This study aims to determine the concentrations of surfactants in the surface microlayer (SML), subsurface water (SSW) and atmospheric aerosol at selected coastal areas in Peninsular Malaysia. The concentrations of anionic and cationic surfactants were determined through colorimetric methods as methylene blue active substances (MBAS) and disulphine blue active substances (DBAS), respectively. Water-soluble ions, for the determination of atmospheric aerosol sources, were determined using ion chromatography (IC) for anions (SO42-, NO3-, Cl- and F-) and cations (Na+, K+, Ca2+ and Mg2+). Principal component analysis (PCA), combined with multiple linear regression (MLR), was used to identify the possible sources of surfactants in aerosol. The results showed the concentrations of anionic surfactants as MBAS dominated the concentration of SML and SSW. The enrichment factors (Efs) ratios between MBAS and DBAS in the SML and SSW were more than 1. The station that is located near to tourism and industrial activities recorded the highest concentrations of surfactants in SML and SSW. Among potential sources of surfactants in aerosol were biomass burning, secondary inorganic aerosol and sea spray. This study suggests anthropogenic sources are main contributors to the concentrations of surfactants in SML, SSW and atmospheric aerosols. |
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