Metal Contamination of the Sediments from the Area II of the Ébrié System Following the Reopening of the Grand-Bassam Inlet

DRIDA Bi Benie Jean Claude, YAO Marcel Konan — Fri, 14 Feb 2025 11:23:54 +0000

This study aimed to assess the impact of the reopening of the Grand-Bassam inlet on the seasonal metal contamination of the superficial sediments of the area II of the Ébrié system by thirteen trace metals (Al, As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Sb, and Zn) and the associated ecological and human health risks. This study was conducted from May 2023 to April 2024. US-EPA sediment quality guidelines and four metal contamination indices (Contamination Factor, Geoaccumulation Index, Contamination Degree, and Mean Contamination Degree) were used to assess the metal contamination of these substrates. Their ecological risks were assessed using two sediment quality guidelines (SEQ-Eau V2 and CB-SQGs) and four indices (mHQ, PERI, mPEC-Q, and mERM-Q). Human health risks, primarily through dermal contact, were assessed using the non-carcinogenic dermal hazard index and lifetime carcinogenic risks index. The findings indicated that metal seasonal contamination of these substrates by trace metals ranged from low to moderate. Overall seasonal metal contamination of these sediments varied from moderate to considerable. Ecological risks were significant during some seasons. Generally, metal contamination and ecological risks were lower during the study period compared to before the reopening of this inlet. Short-term carcinogenic risks for humans were low, while lifetime carcinogenic risks were very high.

Antagonistic, Antioxidant and Phytochemical Screening of Amaranthus viridis Against Bacteria Causing Urinary Infections

Divya P. V., K. Sukesh — Fri, 14 Feb 2025 11:31:29 +0000

The present study was designed to determine the antagonistic activity exhibited by the medicinal plant Amaranthus viridisagainst bacteria causing urinary infections and to screen the antioxidant potentials and the phytochemical constituents possessed by them. Various solvent extracts of the leaves of A. viridis were prepared and evaluated for their antagonistic activities against urinary tract infection-causing bacteria by agar well and disc diffusion methods. The phytochemical screening of the extracts was done qualitatively and the antioxidant potentials were determined by DPPH assay. The results of the antagonistic activity of A. viridis assessed by agar well and disc diffusion methods revealed that the plant extracts possess remarkable antagonistic properties against bacteria causing urinary infections. The phytochemical analysis revealed the presence of secondary metabolites such as phenols, flavonoids, saponins, steroids, glycosides, quinones, tannins, and coumarins. However, the extracts were found to possess low levels of antioxidants. From the above study, the leaves of A. viridis can be considered as a candidate to develop novel drugs against bacteria causing urinary infections.

Journal of Advanced Scientific Research

Metal Contamination of the Sediments from the Area II of the Ébrié System Following the Reopening of the Grand-Bassam Inlet

Antagonistic, Antioxidant and Phytochemical Screening of Amaranthus viridis Against Bacteria Causing Urinary Infections