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Ahoussi, K. E., Koffi, Y. B., Loko, S., Kouassi, A. M., Soro, G., & Biemi, J. (2012). Characterization of Metallic Trace Elements (Mn, Ni, Zn, Cd, Cu, Pb, Cr, Co, Hg, As) in Surface Waters of the Commune of Marcory, Abidjan Côte d’Ivoire: Case of the Village of Abia Koumassi. Geo-Eco-Trop, 36, 159-174.

has been cited by the following article:

• TITLE: Mercury Concentration Profile in Sediment Cores of a Tropical Lagoon under High Anthropogenic Activities around an Urban City—Abidjan, Côte d’Ivoire

  AUTHORS: Achille Gueu, Sébastien Koffi Ouffoué, Bruno Zeli Digbéhi

  KEYWORDS: DMA-80, Mercury, Pollution, Sediments

  JOURNAL NAME: Journal of Geoscience and Environment Protection, Vol.9 No.5, May 28, 2021

  ABSTRACT: The present study focuses on the quantification of mercury in sediment cores from Cocody, Banco, Koumassi and Milliardaires bays in Abidjan, Côte d’Ivoire. It aims at assessing the state of mercury contamination of the lagoon bottom using DMA-80 (Direct Mercury Analyser). The automatic analyzer DMA-80 mercury is an innovative instrument for the analysis of mercury at very low content in solid and liquid samples in five minutes, without requiring any prior steps of pretreatment wet. The results showed, according to the lithological description of different bays, that the cored sediments consist of mud, sand, sandy mud or muddy sand with occasional shells. In addition, our results showed the presence of mercury in the sediments of the lagoon bottom at a degree of contamination that varies from moderate to very high according to the calculated contamination factor (CF) values. The highest contamination was observed in Cocody Bay at the surface with a contamination factor of 7.5, while the lowest contamination was observed in Milliardaires Bay at the water-sediment interface with a contamination factor of 1.67. In addition, mercury concentrations compared to sediment guide values (SQGs) reveal that these sediments mostly show occasional biological effects but no toxicity except Koumassi core (sediments at 20 cm depth). Also, dredging, hydrodynamics have probably impacted the mercury content. The depositional environment of mercury metal is therefore a limiting factor for its fate in the aquatic environment.