Oxidative degradation of humic substances from Manila Bay sediments by thermochemolysis with tetramethyl ammonium hydroxide (TMAH)

Issue Date

6-2004

Abstract

Tetramethylammonium hydroxide (TMAH) thermochemolysis with GC-MS analysis was used to characterize the organic matter and their humic (HA) and fulvic acid (FA) fractions in the sediments of eastern and western parts of Manila Bay. The TMAH degradation products of the sediment, and the HA and FA samples were correlated with probable precursors to determine the relative contributions of autochthonous and allochthonous inputs. The contribution of allochthonous materials was found to be higher in FA than in HA fractions. The FAs, in general, produced the greater number and the higher yields of lignin-derived compounds. The HAs on the other hand, were found to be mainly autochthonous in origin based on the number as well as the relative amounts of fatty acids found in their degradation products. The sediments yielded more varied types of TMAH degradation products compared to their respective HA and FA fractions. There were no significant differences observed between the east and west bay sediments with regard to the mix of degradation products from the HA and FA fractions.

Source or Periodical Title

Journal of Environmental Science and Management

ISSN

0119-1144

Volume

7

Issue

1

Page

10-24

Document Type

Article

Frequency

semi-annually

Physical Description

illustration, graph, tables

Language

English

Subject

oxidative degradation, humic substances, thermochemolysis, Manila Bay

Identifier

https://jesam.sesam.uplb.edu.ph/list_article.php?id=25

Digital Copy

Yes

Link to Full Text

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