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TOTAL DISSOLVED INORGANIC CARBON AND PHYSICOCHEMICAL CHARACTERISTICS OF SURFACE MICROLAYER AND UPPER MIXED LAYER WATER FROM LAGOS LAGOON, NIGERIA

Benson, N. U. and Adedapo , E.A. and Eritobor, A. L. and Udosen, E. D. (2015) TOTAL DISSOLVED INORGANIC CARBON AND PHYSICOCHEMICAL CHARACTERISTICS OF SURFACE MICROLAYER AND UPPER MIXED LAYER WATER FROM LAGOS LAGOON, NIGERIA. Global NEST Journal, 17 (2). pp. 334-343.

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Abstract

The carbonate and physicochemical characteristics of the surface microlayer and upper mixed layer of a tropical coastal lagoon were investigated. Data on the physicochemical parameters generally indicated a moderately polluted ecosystem. The influence of the ocean environment over the Lagoon system was evident by elevated salinity levels. The mean total dissolved inorganic carbon (DIC) for the surface microlayer (SML) and subsurface water (SSW) samples were 2626.6 and 2550.9 μmol kg-1 SW respectively. The dominant inorganic form of DIC in the lagoon water samples was HCO3- with a calculated average abundance >95.4% in the SML and >94% in the SSW. The bicarbonate species derived abundance varied between 1.6% (SML) and 8.4% (SSW), while the aqueous carbon dioxide were generally low in percentages ranging from 0.4 in SSW to 1.5 in SML water samples. In general, the occurrence of the carbonate species was in the order HCO3- > CO32- > CO2. Results showed that total alkalinity (AT) was relatively greater than the DIC. Long term monitoring studies in the coastal lagoon systems is needed to understand the coastal water chemistry and pollution status.

Item Type: Article
Uncontrolled Keywords: Carbonate quantities; physicochemical properties; surface microlayer; upper mixed layer; coastal lagoon
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Engineering, Science and Mathematics > School of Chemistry
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 09 Oct 2015 11:44
Last Modified: 09 Oct 2015 11:44
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/5580

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