TITLE:
Physico-Chemical Pollution and Trophic State of Biétry Bay (Ebrié Lagoon, Abidjan, Ivory Coast)
AUTHORS:
Dan Eude Kpannieu, Kouakou Norbert Kouadio, Ignace Christian M’Bra, Coulibaly Nagnonta Hippolyte, Lacina Coulibaly, S. Ouffouet
KEYWORDS:
Bietry Bays, Pollution, Ebrié Lagoon, Eutrophic
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.10 No.5,
May
31,
2022
ABSTRACT: The analysis of data from the National Observation Network (RNO) of the water quality of the Ivorian Anti-Pollution Center (CIAPOL) relating to
the physico-chemical quality and the trophic state of the lagoon bays of Côte d’Ivoire has allowed apprehending the degree of
pollution of the bays of Biétry. This bay is heavily polluted, overall,
there is a high salinity at depth between 22.5‰ and 27.5‰, a slightly basic
character with a pH oscillating between 7.8 and 8.1 for surface waters and
between 7, 6 and 7.8 for bottom waters. This is a very marked surface
oxygenation between 100.94% and 114.72%; a slightly elevated temperature
oscillating between 28.6°C and 29°C for surface waters and between 26.6°C and
27.1°C for bottom waters. This is high turbidity due to suspended solids and high nitrogen and phosphorus concentrations as well. As a result, these waters evolve towards a “mesotrophic” character
according to the OECD (1982) and they are
“eutrophic” according to Carlson (1977). This water is therefore impure
according to the WHO concerning water intended for bathing activities.