TITLE:
Evaluation of Metallic Trace Elements Content (Cadmium, Copper, Zinc and Lead) in the Water of Lake Azili in the Municipality of Zangnanado (Centre-Benin)
AUTHORS:
Flavien Edia Dovonou, Joselyne Lisbeth Godonou, Marcel Kindoho, Etienne Mivodjo Alladassivo, Prudence Mahutondji Dossou, Mathieu Bidossessi Hounsou, Nicaise Yalo
KEYWORDS:
Pollution, Lake Azili, Zangnanado, Quality, Environment
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.10 No.7,
July
26,
2022
ABSTRACT: This study focuses on the assessment of the level of contamination in
metallic trace elements (cadmium, copper, zinc and lead) in the waters of lake
Azili in the municipality of Zangnanado. The methodology adopted to achieve
these results is the method of molecular absorption spectrophotometry. Four
sites were sampled at the beginning of
November 2020 (period of the long dry season). The results obtained show
that the copper content varies between 1.04 mg/l and 1.67 mg/l. The zinc
content between 0.2 mg/l to 0.62 mg/l and those of lead recorded are all above
0.05 mg/l. As for their cadmium concentration, they are all above 0.001 mg/l. These
results from water analysis of Azili lake show that the sources of this type
contamination of the lake are due on the one hand to human activities (dumps of
household waste, use of motorized boats) and others other hand to the
contributions of the effluents of the lake
carrying pesticides. The water quality of Lake Azili is therefore
influenced by these various metallic trace elements found there. These results
show that the waters of lake Azili are at their beginning of pollution even if
it is not yet alarming at the time of our study. Under these conditions, if
nothing is done to mitigate it, the pollution will be critical over time.