The goal of this monitoring project is to identify the source and distribution of Polycyclic Aromatic Hydrocarbons in Ngoua River water and coastal sediments. The identification and quantification of 15EPA-PAHs in water and sediment samples collected from the Ngoua River in Douala, Cameroon are reported in this research. The PAH pollution in the Ngoua River had to be assessed by identification and quantification. During the dry and wet seasons, water and sediment samples were taken. Eight (8) samples were collected, with four samples each season and substrate. The PAHs fraction was extracted from water using magnetic agitation and hexane as a solvent. Using a chromatographic column, PAHs were separated, identified, and quantified using Gas Chromatography (GC/FID). During the wet season, the total concentration in sediment ranged from 140.42 g/g to 229.47 g/g dry materials, and during the dry season, it ranged from 48.89 g/g to 333.49 g/g dry matters. Due to industrial operations, high Molecular Weight (HMW) PAHs predominated in all samples. The quantities of PAHs discovered upstream were consistently lower than those found downstream, indicating a role for Nettoycam Company in local PAH contamination. The results of principal component analysis (PCA) revealed significant differences in the features of samples taken upstream and downstream of Nettoycam Company, as well as samples collected during rainy and dry seasons. The overall content of PAHs in river samples ranges between 29.13 to 461.94 g/L, according to examinations of extracts from water samples. PAHs with two or three rings have low quantities and are even undetectable in some tests. PAHs with more than four rings had the highest quantities in the river, regardless of seasonal change. Some ratios revealed a prevalence of petroleum sources of hydrocarbons.
Author (S) Details
Ze Bilo’o Philemon
Laboratory of Refining and Petrochemistry, Faculty of Mines and Petroleum Industries, The University of Maroua, P.O. Box: 08 Kaele, Cameroon and Laboratory of Industrial Chemistry and Bioressources (LICB), National School of Agro-Industrial Sciences (ENSAI), The University of Ngaoundere, P.O. Box 455 Ngaoundere, Cameroon.
Jessie Ekoka Christelle Solange
Laboratory of Industrial Chemistry and Bioressources (LICB), National School of Agro-Industrial Sciences (ENSAI), The University of Ngaoundere, P.O. Box 455 Ngaoundere, Cameroon.
Ngassoum Martin Benoit
Laboratory of Industrial Chemistry and Bioressources (LICB), National School of Agro-Industrial Sciences (ENSAI), The University of Ngaoundere, P.O. Box 455 Ngaoundere, Cameroon.
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