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Humic Substances from Manila Bay and Bolinao Bay Sediments

Author(s): Elma Llaguno

Journal: Science Diliman
ISSN 0115-7809

Volume: 9;
Start page: 7;
Date: 1997;
Original page

Keywords: humic substances | Manila Bay | Bolinao Bay | sediments

The C,H,N composition of sedimentary humic acids (HA) extracted from three sites in Manila Bay and six sites in Bolinao Bay yielded H/C atomic ratios of 1.1-1.4 and N/C atomic ratios of 0.09 - 0.16. The Manila Bay HA's had lower H/C and N/C ratios compared to those from Bolinao Bay. The IR spectra showed prominent aliphatic C-H and amide I and II bands. Manila Bay HA's also had less diverse molecular composition based on the GC-MS analysis of the CuO and alkaline permanganate oxidation products of the humic acids.
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