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Bulk chemical and optical spectroscopy characterisations of dissolved organic matter extracted from the tropical coastal sediment

Dzulkafli, Noor Fazreen and Mahdzir, Akbariah and Hara, Hirofumi (2021) Bulk chemical and optical spectroscopy characterisations of dissolved organic matter extracted from the tropical coastal sediment. Journal of Marine Science and Engineering, 9 (9). pp. 1-18. ISSN 2077-1312


Official URL: http://dx.doi.org/10.3390/jmse9090997


The study of organic matter characterisation in coastal sediment is useful for understanding how dissolved organic matter (DOM) reactivity influences the fate of pollutants in the aquatic environment. However, there is little information available on the structural properties of DOM in coastal sediment. Chemical analysis, UV-Visible (UV-Vis) absorbance, fluorescence, and Fourier-transform infrared (FTIR) spectroscopy were used in this work to characterise and compare the components of water-extractable organic matter (WEOM) fractions from sediment from an estuary, a coastal area, and a port in Peninsular Malaysia, Malaysia. The elemental analysis (H/C and C/N ratios) of the three samples differed, which coincided with the findings of optical indices estimated from UV-Visible and fluorescent spectroscopy analyses. WEOM had an average output of 7.05 to 8.47 mg/L and was very dominating with heavy fraction organic carbon (HFOC). In DOM-KS and DOM-K sediments, the allochthonous component with a high degree of condensation and the aromatic compound was the dominating composition. Meanwhile, the DOM-KT possessed a high autochthonous composition as well as carboxylic and phenolic content. Correlation analysis indicates that the aromaticity indexSUVA254 and humification index (HIX) have positive correlations. The combined results of the chemical and spectroscopic analyses indicate that different coastal ecosystems, with the integration of various human and land activities, produce variations in DOM in the coastal area.

Item Type:Article
Uncontrolled Keywords:coastal sediment, dissolved organic matter, water-extractable organic matter
Subjects:G Geography. Anthropology. Recreation > GC Oceanography
Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Malaysia-Japan International Institute of Technology
ID Code:94804
Deposited By: Yanti Mohd Shah
Deposited On:30 Apr 2022 06:27
Last Modified:30 Apr 2022 06:27

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