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3 results on '"Robert B. Suami"'

1. Assessment of metal concentrations in oysters and shrimp from Atlantic Coast of the Democratic Republic of the Congo

Author

Robert B. Suami, Dhafer Mohammed M. Al Salah, César D. Kabala, J.-P. Otamonga, Crispin K. Mulaji, Pius T. Mpiana, and John W. Poté

Subjects
Environmental science, Environmental pollution, Water pollution, Water quality, Environmental risk assessment, Heavy metal, Science (General), Q1-390, Social sciences (General), H1-99
Abstract

Oysters and shrimp are abundant and commonly consumed seafood by the indigenous population of the Kongo central region of the Democratic Republic of the Congo (DRC). Literature reviews suggest that no data were available for the metal concentrations in these species. Consequently, the purpose of this study is to determine the metal concentrations in tissues of oysters (Egeria congica) and shrimp (Macrobrachium spp., Parapenaeus spp., Penaeus spp.) collected in November 2017 from the Atlantic Ocean Coast of DRC in the territory of Muanda. Metal levels in the seafood species studied here were put into context using international regulation for human consumption set by the Food and Agriculture Organization (FAO), Canadian Food Inspection Agency (CFIA), European Union (EU), and World Health Organization (WHO). Our results demonstrated that the concentration of heavy metals varied considerably between sampling sites and analyzed species (P < 0.05), with the values (in mg kg1) ranged between 0.05-0.41, 0.03–2.25,

Published
2019
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2. Concentration of heavy metals in edible fishes from Atlantic Coast of Muanda, Democratic Republic of the Congo

Author

Crispin K. Mulaji, Periyasamy Sivalingam, César D. Kabala, Jean-Paul Otamonga, Pius T. Mpiana, Robert B. Suami, and John Poté

Subjects
Fish consumption, 0211 other engineering and technologies, chemistry.chemical_element, 02 engineering and technology, 010501 environmental sciences, 01 natural sciences, Trichiurus lepturus, law.invention, law, ddc:550, 14. Life underwater, Se/Hg molar ratio, Inductively coupled plasma mass spectrometry, Atlantic Ocean, 0105 earth and related environmental sciences, 021110 strategic, defence & security studies, Cadmium, biology, Mugil, Food analysis, Heavy metals, Aquatic animal, Congo DR, biology.organism_classification, Bioaccumulation, Heavy metal, chemistry, Environmental chemistry, Food composition, Selenium antagonistic effect, Atomic absorption spectroscopy, Human health risk, Food Science
Abstract

The present study aims to determine the levels of heavy metals in edible nine different commonly consumed fish species (Pseudotolithus elongatus, Pseudotolithus senegalensis, Cynoglossus senegalensis, Trichiurus lepturus, Galeoides decadactylus, Pentanemus quinquarius, Chrysichthys nigrodigitatus, Mugil curema, and Arius latiscutatus). Fishes were collected during August 2016 from five sites of West Atlantic Ocean Coast of the Democratic Republic of the Congo. Heavy metals (Cr, Cu, Zn, Ni, Sb, Cd, Pb, and Se) levels in fish muscle tissues were determined using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) whereas Hg analysis was carried out using atomic absorption spectrophotometry (AAS). Metal concentrations varied considerably among sampling sites and fish species (P

Published
2018

3. Heavy metals and persistent organic pollutants contamination in river, estuary, and marine sediments from Atlantic Coast of Democratic Republic of the Congo

Author

Robert B. Suami, Pius T. Mpiana, Jean-Paul Otamonga, Florian Breider, Dhafer Mohammed M. Al Salah, Periyasamy Sivalingam, Dominique Grandjean, John Poté, and Crispin K. Mulaji

Subjects
Pollution, Geologic Sediments, Health, Toxicology and Mutagenesis, media_common.quotation_subject, Persistence organic pollutants, Atlantic Coast, 010501 environmental sciences, 01 natural sciences, Polybrominated diphenyl ethers, Rivers, Metals, Heavy, ddc:550, Sediment pollution, Risks, Environmental Chemistry, Ecotoxicology, 14. Life underwater, Polycyclic Aromatic Hydrocarbons, 0105 earth and related environmental sciences, media_common, Pollutant, geography, geography.geographical_feature_category, Aquatic ecosystem, Sediment, Estuary, General Medicine, Polychlorinated Biphenyls, Polycyclic aromatic hydrocarbons, 6. Clean water, Heavy metals, 13. Climate action, Benthic zone, Environmental chemistry, Democratic Republic of the Congo, Environmental science, Environmental Pollutants, Estuaries, Water Pollutants, Chemical, Environmental Monitoring
Abstract

The pollution assessment and the evaluation of potential risks in the Atlantic Coastal Region of the Democratic Republic of the Congo are still very limited. Consequently, the present study investigates for the first time the concentrations of heavy metals and persistent organic pollutants (organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), and polycyclic aromatic hydrocarbons (PAHs)) in river, estuary, and marine sediments from this area. The results highlighted high concentrations of Cr, Zn, As, and Pb exceeding the probable effect level (PEL) on aquatic life. Zn was the most dominant element detected at a range of 180–480 mg kg−1 in marine sediment, 132–382 mg kg−1 in estuary sediment, and 121–687 mg kg−1 in river sediment. Total PCBs (∑7 × 4.3) ranged from 1995 to 20,156 μg kg−1, 2013–12,058 μg kg−1, and 1861–36,417 μg kg−1 in marine, estuary, and river sediments, respectively. Total PCBs (∑7 × 4.3) were above PEL for all sediments, suggesting potential adverse effects on benthic organisms. The OCP, PBDE, and PAH levels were low to moderate for all sediments. Taking into consideration, the concentrations of Zn, Pb, PCBs, and DDTs, probable environmental risks, are present.

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