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61,005 resultsShowing papers similar to Evaluation of Heavy Metal Pollution in Commonly Consumed Mollusc (Crassostrea gasar) from Elechi Creek, River State, Nigeria and the Health Risk Implications
ClearAssessment of Heavy Metal Contamination in Shrimp and Water from the Great Kwa River: Implications for Human Health and Aquatic Ecosystems
Researchers measured heavy metal concentrations in shrimp and water samples from Nigeria's Great Kwa River. The study found elevated levels of several toxic metals linked to oil exploration and industrial activities, with some metals in shrimp tissue exceeding safe consumption limits, raising concerns about health risks for local communities who rely on river shellfish as a food source.
Heavy Metals and their Effects on Macroinvertebrates Present in the Ojo River, Lagos, Nigeria
Researchers investigated heavy metal concentrations in the tissues of crab, prawn, and crayfish from the Ojo River in Lagos, Nigeria, assessing contamination levels in commercially harvested crustaceans and their implications for human health and aquatic ecosystem integrity.
Many Oil Wells, One Evil: Potentially toxic metals concentration, seasonal variation and Human Health Risk Assessment in Drinking Water Quality in Ebocha-Obrikom Oil and Gas Area of Rivers State, Nigeria
Researchers assessed heavy metal concentrations and seasonal variation in drinking water from an oil and gas extraction area in Nigeria, finding contamination levels that pose significant human health risks including potential neurological and carcinogenic effects.
Heavy metals bioconcentration in Crassostrea rhizophorae: A site-to-site transplant experiment at the Potengi estuary, Rio Grande do Norte, Brazil
Researchers transplanted oysters (Crassostrea rhizophorae) between two sites in the Potengi estuary in Brazil to assess heavy metal bioconcentration over six months, finding site-specific accumulation patterns for cadmium, chromium, copper, lead, nickel, and zinc that reflected local contamination gradients. The transplant experiment demonstrated the utility of oysters as active biomonitors for tracking spatial metal pollution in estuarine systems.
Risk assessment of potentially toxic elements in water, sediment, aquatic mussels, and edible crops from a gold-mining-stressed river in Northern Nigeria
Researchers assessed potentially toxic element contamination from artisanal gold mining in a Nigerian river, finding cadmium, chromium, lead, copper, and nickel concentrations exceeding WHO guidelines by roughly tenfold in water, with bioaccumulation in mussels and crops posing significant non-carcinogenic and carcinogenic health risks to local populations.
Bioaccumulation of Heavy Metals in Pelagic and Benthic Fishes of Ogbese River, Ondo State, South-Western Nigeria
Researchers measured heavy metal concentrations in water, sediments, and fish organs from the Ogbese River in Nigeria. The study found that while fish tissue metal levels were within permissible limits, sediment concentrations of cadmium, chromium, iron, and manganese exceeded safe thresholds, indicating moderate contamination risk that warrants ongoing monitoring.
Distribution of Heavy Metals in Sediments and Soft Tissues of the Cerithidea obtusa from Sepang River, Malaysia
Heavy metal concentrations were measured in the tissues, shells, and surface sediments associated with the mangrove snail Cerithidea obtusa from a Malaysian river estuary. Iron was the dominant metal across all compartments, and soft tissues accumulated metals differently from shells. The study contributes to understanding how estuarine organisms accumulate metals from contaminated sediments.
Occurrence of microplastics and heavy metals accumulation in native oysters Crassostrea Gasar in the Paranaguá estuarine system, Brazil
Researchers examined native oysters from the Paranagua estuarine system in Brazil for both microplastic contamination and heavy metal accumulation. They found high levels of microplastics in all oyster samples, along with elevated concentrations of several heavy metals, and observed potential interactions between the two pollutant types. The study raises concerns about the combined exposure risks from microplastics and heavy metals in seafood harvested from polluted estuaries.
Assessment of Heavy Metal Contamination and Pollution Indices in Avicennia marina of Nabq Mangrove Forest, the Red Sea, Egypt
Not relevant to microplastics — this study assesses heavy metal concentrations (including copper, zinc, and lead) in the tissues of mangrove trees in an Egyptian Red Sea nature reserve to evaluate contamination from urbanization and industry.
Many oil wells, one evil: comprehensive assessment of toxic metals concentration, seasonal variation and human health risk in drinking water quality in areas surrounding crude oil exploration facilities in rivers state, Nigeria
Researchers assessed toxic metal concentrations in drinking water near crude oil exploration facilities in Nigeria, finding seasonal variations and levels exceeding safety thresholds that pose serious health risks to surrounding communities.
Comparative Assessment Of Heavy Metal Accumulation In Two Commercial Fish Species (Clarias Gariepinus And Chrysichthys Nigrodigitatus) From Amansea River, Nigeria
Researchers measured heavy metal concentrations (Pb, Hg, As, Cd, Cr) in water, sediment, and tissues of two commercially important fish species from Amansea River, Nigeria. C. nigrodigitatus accumulated significantly more cadmium and chromium than C. gariepinus, with Bioaccumulation Factors indicating species-specific differences in heavy metal uptake relevant to food safety.
The use of green mussel as bioindicator of heavy metal pollution in Indonesia: a review
This review covers the use of Asian green mussel Perna viridis as a bioindicator of heavy metal pollution in Indonesian waters, summarizing studies on metal accumulation in mussel tissue relative to water quality and discussing implications for seafood safety.
Heavy Metal Concentration and Human Health Risk Assessment of Selected Brands of Seasoning Powder Sold in Port Harcourt, Nigeria
Researchers assessed heavy metal concentrations in four brands of seasoning powder sold in Port Harcourt, Nigeria, and found levels of arsenic, lead, cadmium, and other metals that posed potential human health risks, highlighting food safety concerns in the region.
Spatial Distribution and Risk Assessment of Heavy Metals in Sediments of the Mangrove Ecosystem in Ras Mohammed Protectorate, Gulf of Aqaba, Red Sea
Researchers measured heavy metal concentrations (including lead, cadmium, copper, and zinc) in mangrove sediments of Ras Mohammed Protectorate in the Gulf of Aqaba, Red Sea, and assessed ecological risks. The spatial distribution showed variation across sites, with some metals elevated above background levels in areas closer to human activities.
Levels of Elements in Typical Mussels from the Southern Coast of Africa (Namibia, South Africa, Mozambique): Safety Aspect
Researchers measured 24 elements in mussels (Mytilus galloprovincialis) from Namibia, South Africa, and Mozambique, finding chromium, arsenic, selenium, and partly zinc exceeded permissible seafood limits at polluted stations, posing health risks at consumption levels as low as 200 g/week.
Risk assessment of selected metallic pollutants in fish from Zuru Dam, Kebbi State, Nigeria
Researchers measured concentrations of seven metals (Fe, Zn, Cu, Cr, Co, Pb, K) in catfish and tilapia from Zuru Dam in Nigeria and performed health risk assessments, finding metal levels that may pose risks to communities consuming fish from this water body.
Health risk-benefit assessment of the commercial red mangrove crab: Implications for a cultural delicacy
Researchers conducted a risk-benefit assessment of red mangrove crabs from Ecuador's Guayas estuary, finding that inorganic arsenic was the primary contaminant of concern and that safe consumption is possible in limited portions, underscoring how environmental pollution quality directly constrains the safety of culturally important seafood.
METAL CONCENTRATIONS IN Isognomon alatus BY STAGES AND CLIMATIC SEASONS IN SAN ANDRÉS ISLAND, COLOMBIAN CARIBBEAN
Researchers used atomic absorption spectrometry to measure zinc, cadmium, and copper concentrations in the flat oyster Isognomon alatus and surrounding water samples from San Andres Island, Colombia across three climatic seasons in 2009 and 2010. They found significantly higher zinc concentrations in adult versus juvenile oysters at certain sites, with metal bioaccumulation varying seasonally in relation to rainfall intensity, supporting I. alatus as a useful biomonitor for heavy metal contamination in the Caribbean.
Occurrence of microplastics in wild oysters (Crassostrea tulipa) from the Gulf of Guinea and their potential human exposure
Researchers found that 84% of wild mangrove oysters from Ghana's coast had ingested microplastics, with fibers being the most common type, highlighting potential human health exposure through seafood consumption in the Gulf of Guinea.
Exposure Assessment of Heavy Metals and Microplastic-like Particles from Consumption of Bivalves
Researchers assessed lead, cadmium, and microplastic-like particle contamination in clams, mussels, and cockles from wholesale seafood markets on the upper Gulf of Thailand. The study found that while general exposure levels from bivalve consumption posed no significant health risk for most age groups, high cockle consumption by children in worst-case scenarios could raise concerns due to elevated cadmium levels.
Assessment of heavy metal distribution, contamination, and ecological risk in mangrove sediments of the Nabq Protectorate, Gulf of Aqaba
This study analyzed the distribution of six heavy metals (Cu, Fe, Cd, Pb, Zn, and Mn) in mangrove sediments at Nabq Protectorate in the Gulf of Aqaba, finding that concentrations were generally below contamination thresholds compared to crustal averages. Iron showed the highest concentrations, while the area was assessed as largely uncontaminated relative to reference standards.
Monitoring and modeling of heavy metal contents in vegetables collected from markets in Imo State, Nigeria
Researchers monitored heavy metal concentrations — including cadmium, lead, nickel, and zinc — in four commonly consumed vegetables from markets across Imo State, Nigeria, assessing contamination levels and associated human health risks through dietary exposure.
The seasonal assessment of heavy metals pollution in the waters of the Mediterranean and Atlantic seas of Morocco
This study measured heavy metal concentrations (Cd, Pb, Zn, Fe, Cu, Cr, Ni) in water samples from both the Mediterranean and Atlantic coasts of Morocco, evaluating seasonal variation in metallic pollution and associated health risks from seafood consumption.
Early Detection of Heavy Metal Pollution with Biological Markers in Freshwater Clam (Corbicula javanica) in Maros River, Indonesia
Scientists found that freshwater clams can serve as early warning systems for dangerous heavy metals like lead and cadmium in rivers by producing special proteins called metallothioneins when exposed to these pollutants. The clams showed signs of metal poisoning within just one to five weeks, making them useful "canaries in the coal mine" for detecting water contamination before it reaches dangerous levels. This matters because heavy metals in water sources can eventually make their way into drinking water and food, potentially harming human health.