Evaluation of heavy metal pollution and ecological risk of surface sediments in a tropical mountainous River-Estuary-Shelf Continuum system: A case study of the Selangor River, Malaysia

Marine Environmental Research, Journal Year: 2025, Volume and Issue: 205, P. 107017 - 107017

Published: Feb. 13, 2025

Language: Английский

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Sediment quality and ecological risk assessment in Mediterranean harbors of Occitanie, France: implications for sustainable dredged material management

Marine Pollution Bulletin, Journal Year: 2025, Volume and Issue: 217, P. 118097 - 118097

Published: May 3, 2025

The Mediterranean coastal region of Occitanie (France) hosts numerous harbors with economic and touristic activities requiring periodic dredging that may release potentially toxic elements organic pollutants into the marine environment. Monitoring sediment quality using Sediment Quality Guidelines (SQGs) is essential to assess contamination risks. This study summarizes geochemical physical characteristics sediments from ten evaluates associated ecological risks inform management strategies. Results are based on measurements required by French regulation showed studied mostly composed fine-grained rich in matter (32 % average), those accumulate few contaminants, mainly copper (38-123 mg/kg), zinc (66-156 lead (15-48 as well including polycyclic aromatic hydrocarbons (0.23-2.1 polychlorinated biphenyls (0.05-0.3 mg/kg). Statistical analysis revealed strong correlations between grain size contaminants distribution. Ecological risk assessment indicated varying but low levels. Copper emerged main contaminant, exceeding threshold effect concentration 77 samples probable 5 %. mean quotient index suggested moderate risks, a 33-58 probability adverse effects benthic organisms, emphasizing need for regular monitoring prevent potential increases contamination. underlined interest adaptive approach, integrating chemical analyses, bioaccumulation studies, toxicity testing. While regulatory thresholds provide disposal guidelines, further studies needed refine assessments support sustainable remediation

Language: Английский

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Constraining the Composition and Biochemical Activity of Organic Carbon in a Large Eutrophic Estuary using Size-Fractionated Analysis

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121853 - 121853

Published: May 1, 2025

Language: Английский

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Heavy metals in the continuous river−estuary−sea system of the Yellow River Delta, China: Spatial patterns, potential sources, and influencing factors

Marine Pollution Bulletin, Journal Year: 2024, Volume and Issue: 209, P. 117247 - 117247

Published: Nov. 16, 2024

Language: Английский

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