scholarly journals Trace Metals in Selected Fish Species from Five Cowries Creek, Southwest Nigeria: Consumer Safety Assessment

2021 ◽  
pp. 38-48
Author(s):  
Kayode James Balogun ◽  
Kazeem Oladeji Kareem ◽  
Emmanuel Kolawole Ajani
Keyword(s):  
Trace Metals ◽  
Health Risk ◽  
Fish Species ◽  
Carcinogenic Risk ◽  
International Standards ◽  
Consumer Health ◽  
Potential Health ◽  
Safety Risks ◽  
Muscle Tissues ◽  
Guideline Value

This study aims to examine trace metals (Pb, Cd, Cr, Zn, and Cu) concentration in muscle tissues of four fish species from Five Cowries Creek and assess the safety risks posed by consuming these fish species. For this purpose, fish species such as Cynoglossus senegalensis, Mugil cephalus, Chrysichthys nigrodigitatus and Pseudotolithus typus were procured monthly from anglers in Five Cowries Creek, Lagos, from February to May, 2019. The fish muscle tissues were digested according to the international standards, and the trace metals were measured using an atomic absorption spectrophotometer (AAS). Results revealed that the ranking order of trace element concentrations followed this sequence: Pb > Cr > Zn > Cu > Cd. There were significant differences (P < 0.05) in Pb and Cr among the fish species. Consumer health risk was evaluated using non-carcinogenic and carcinogenic risk indices. The results showed that EDI and target hazard quotient (THQ) of Cr, Zn, Cu and Cd suggested that fish species consumption did not pose risk to consumer health. Nevertheless, the estimated daily intake (EDI) along with THQ of Pb indicated potential health risks to consumers (children and adult) of Chrysichthys nigrodigitatus. The target hazard index (THI) of trace elements in all investigated fish species exceeded the guideline value of 1, indicating an adverse health risk for exposed consumers. However, the carcinogenic risk of Pb was negligible for children and adult consumers of fish species. The results are anticipated to create alertness among the public on the safety risks as a result of consuming metal-contaminated fish. Authorised regulatory agencies should control the unregulated uses of Five Cowries Creek, Lagos and associated water bodies through the enforcement of various regulations, policies and laws.

scholarly journals Heavy Metals in Fish Muscle from an Ethiopian Rift-Valley Lake (Hawassa) and a Neighboring Stream (Boicha): Assessment of Human Health Risks

2020 ◽  
Vol 24 (8) ◽  
pp. 1409-1418
Author(s):  
B. Samuel ◽  
S. Sorsa ◽  
F. Daniel ◽  
G. Riise ◽  
G.M. Zinabu
Keyword(s):  
Heavy Metals ◽  
Health Risk ◽  
Human Health ◽  
Health Risks ◽  
Fish Species ◽  
Fish Consumption ◽  
Rift Valley ◽  
Ethiopian Rift ◽  
Human Health Risks ◽  
Muscle Tissues

Concentrations of heavy metals (Cr, Co, Fe, Ni, Cu, Zn, As, Se, Pb and Hg) in muscle tissues of two fish species (Clarias gariepinus and Oreochromis niloticus) in an Ethiopian rift-valley lake (Hawassa) and a neighboring stream (Boicha) were determined. Target hazard quotients (THQ), hazard index (HI) and target cancer risk (TCR) were used as indices to evaluate potential human health risks from fish consumption. Average concentrations of metals decreased in the order Zn>Fe>Se>Cu>Hg>As>Ni>Cr>Co>Pb and Zn>Fe>Se>Cu>As>Hg>Cr>Ni>Pb>Co in muscle tissues of C. gariepinus and O. niloticus, respectively. Mean concentrations of Hg (0.34+0.04 mg kg-1) in muscle tissues of C. gariepinus from Lake Hawassa, and As (0.18+0.05 mg kg-1) as well as Hg (0.46+0.03 mg kg-1) in muscle tissues of C. gariepinus from Boicha stream were above the safety limits set by WHO/FAO. Likewise, mean concentrations of As (0.31+0.03 mg kg-1) and Hg (0.19+0.05 mg kg-1) in muscle tissues of O. niloticus from Lake Hawassa and Cr (0.19+0.03 mg kg-1), As (0.33 +0.04 mg kg-1), and Hg (0.34+0.09 mg kg-1) in O. niloticus from Boicha stream were also above safety limits. From the results of human health risk assessments it was concluded that Cr, Cu, Hg and As pose potential health risks due to consumption of the two fish species from both water bodies. Moreover, effects of all heavy metals put together may affect human health as indicated by the high HI. Effluents from industries are assumed to be the main sources of the heavy metals. Therefore, regular monitoring of the water bodies and policy interventions with respect to waste disposal are recommended to protect the health of the ecosystem and the public. Keywords: Fish consumption, health risk, heavy metals, Lake Hawassa

scholarly journals Human health risk assessment of screened pesticides residues in two edible fish species of river Ganga, India

2020 ◽  
Author(s):  
Zeshan Shah ◽  
Zubair Nengroo
Keyword(s):  
Health Risk ◽  
Human Health ◽  
Common Carp ◽  
Fish Species ◽  
Risk Ratio ◽  
Pesticide Residues ◽  
Human Health Risk ◽  
Carcinogenic Risk ◽  
River Ganga ◽  
Edible Fish

Abstract Study was carried out to determine the concentration and bioaccumulation of pesticide residues in edible fish from river Ganga, India, to assess human health risk via consumption of fish. Two commonly edible fish species bagrid catfish and common carp were collected. The n-hexane extract of the muscle tissues were characterized by gas chromatography coupled to mass spectrometry and quantified by electron capture detector for pesticide residues. Bioaccumulation factors (BAFs) in common carp of pesticides were found to be higher than those in bagrid fish. Daily exposures of pesticides for consumers via fish consumption were determined by calculating and comparing estimated daily intake (EDI) with ADI values. The EDI results in our study were insignificantly high from ADI values. Non-carcinogenic and carcinogenic risks were evaluated by Target hazard quotient (THQ) and risk ratio (R), respectively. Hazard quotients (THQ) were found to be lower than the set 1.0, inferring non-carcinogenic risk by consumption of fish from the river. Regard to contaminants carcinogenic affects the total risk ratio (R) value of pesticides were found lower than threshold of tolerable risk except of heptachlor indicating carcinogenic risk via consumption of fish. The results demonstrate that due to increased pollution in the ecosystem required more attention.

scholarly journals Contamination and oxidative stress biomarkers in estuarine fish following a mine tailing disaster

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e10266 ◽  
Author(s):  
Fabrício Â. Gabriel ◽  
Rachel Ann Hauser-Davis ◽  
Lorena Soares ◽  
Ana Carolina A. Mazzuco ◽  
Rafael Christian Chavez Rocha ◽  
...  
Keyword(s):  
Trace Metals ◽  
Trace Metal ◽  
Human Health ◽  
Health Risks ◽  
Fish Species ◽  
Reduced Glutathione ◽  
Estuarine Sediments ◽  
Metal Concentrations ◽  
Human Health Risks ◽  
Muscle Tissues

Background The Rio Doce estuary, in Brazil, was impacted by the deposition of iron mine tailings, caused by the collapse of a dam in 2015. Based on published baseline datasets, the estuary has been experiencing chronic trace metal contamination effects since 2017, with potential bioaccumulation in fishes and human health risks. As metal and metalloid concentrations in aquatic ecosystems pose severe threats to the aquatic biota, we hypothesized that the trace metals in estuarine sediments nearly two years after the disaster would lead to bioaccumulation in demersal fishes and result in the biosynthesis of metal-responsive proteins. Methods We measured As, Cd, Cr, Cu, Fe, Mn, Pb, Se and Zn concentrations in sediment samples in August 2017 and compared to published baseline levels. Also, trace metals (As, Cd, Cr, Cu, Fe, Hg, Mn, Pb, Se and Zn) and protein (metallothionein and reduced glutathione) concentrations were quantified in the liver and muscle tissues of five fish species (Cathorops spixii, Genidens genidens, Eugerres brasilianus, Diapterus rhombeus and Mugil sp.) from the estuary, commonly used as food sources by local populations. Results Our results revealed high trace metal concentrations in estuarine sediments, when compared to published baseline values for the same estuary. The demersal fish species C. spixii and G. genidens had the highest concentrations of As, Cr, Mn, Hg, and Se in both, hepatic and muscle, tissues. Trace metal bioaccumulation in fish was correlated with the biosynthesis of metallothionein and reduced glutathione in both, liver and muscle, tissues, suggesting active physiological responses to contamination sources. The trace metal concentrations determined in fish tissues were also present in the estuarine sediments at the time of this study. Some elements had concentrations above the maximum permissible limits for human consumption in fish muscles (e.g., As, Cr, Mn, Se and Zn), suggesting potential human health risks that require further studies. Our study supports the high biogeochemical mobility of toxic elements between sediments and the bottom-dwelling biota in estuarine ecosystems.

Methylmercury in fish from the southern Baltic Sea and coastal lagoons as a function of species, size, and region

2017 ◽  
Vol 33 (6) ◽  
pp. 503-511 ◽  
Author(s):  
Lucyna Polak-Juszczak
Keyword(s):  
Fish Species ◽  
Total Mercury ◽  
Coastal Lagoons ◽  
Length Distribution ◽  
Fish Length ◽  
Consumer Health ◽  
Fish Size ◽  
Toxic Compound ◽  
Muscle Tissues ◽  
The Central Nervous System

Background: Methylmercury (MeHg) is a highly toxic compound that traverses the blood–brain barrier with deleterious effects to the central nervous system. Exposure is generally through the ingestion of contaminated fish. Fish are a main source of MeHg. Goals and methods: The aim of this study was to determine the dependence of MeHg concentrations on fish species and age, the percentage of MeHg in total mercury (THg) and risk assessment depending on the size of fish. Assays of THg and MeHg were performed on the muscle tissues of 18 species of fish. Results: The investigations indicated there were differences in the mercury concentrations depending on fish size. THg and MeHg concentrations in the muscles of fish species that have a wide length distribution were strongly, positively correlated with fish length. However, concentrations of MeHg were strongly, positively correlated with those of THg in all the fish species investigated. Variation in the percentage share of MeHg in THg in the muscles of fish of large sizes was also noted within species, but this correlation was not noted in small-sized fish. The dose of MeHg in small-sized fish species was estimated and the risk posed to consumer health was assessed using mean MeHg concentrations determined for different fish species. Conclusions: For species of fish that occur within a wide length distribution, the dose of MeHg should be assessed separately in different length classes. Fish consumption of small-sized species poses no health risk.

scholarly journals Health Risk Assessment of VOCs from Surgical Smoke

2017 ◽  
Author(s):  
Shaohua She ◽  
Gang Lu ◽  
Wah Yang ◽  
Mianwei Hong ◽  
Lingfei Zhu
Keyword(s):  
Risk Assessment ◽  
Health Risk ◽  
Health Risk Assessment ◽  
Evaluation Model ◽  
Carcinogenic Risk ◽  
Surgical Instruments ◽  
Operating Theater ◽  
Potential Health ◽  
Surgical Smoke ◽  
Risk Of Cancer

Surgical smoke is produced by energy-based surgical instruments. The airborne volatile organic compounds (VOCs) from surgical smoke may have potential health risk. This study aimed to evaluate the evidence for the harmful effects on the operating theater staff. An internationally recognized evaluation model of health risk assessment (HRA) was adapted to preliminarily assess the health risks caused by VOCs in surgical smoke. Results of HRA indicated that non-carcinogenic risk indexes of VOCs did not exceed one, indicating that these pollutants didn't cause significant non-carcinogenic harm to the health of the operating theater staff. But the cancer risk indexes exposed to formaldehyde and benzene all exceed 10-5, which was higher than the suggested value of USEPA (10-6) and might cause potential harm to the health of the operating theater staff. Long-term exposure of such surgical smoke will be harmful to the health of the operating theater staff and have a great risk of cancer.

scholarly journals Evaluating Heavy Metals Contamination in Campus Dust in Wuhan, the University Cluster in Central China: Distribution and Potential Human Health Risk Analysis

2021 ◽  
Author(s):  
Shan Liu ◽  
Xihao Zhang ◽  
Changlin Zhan ◽  
Jiaquan Zhang ◽  
Jun Xu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Health Risk ◽  
Health Risks ◽  
Human Health Risk ◽  
Carcinogenic Risk ◽  
Central China ◽  
Natural Soil ◽  
Lifetime Cancer Risk ◽  
Potential Health ◽  
The University

Abstract The potential health risk of heavy metals (HMs) in campus dust may threaten the health of thousands of students, teachers, and their families in Wuhan, the university cluster in Central China every day. In this research, the pollution characteristics and health risk with HMs was the first time presented in campus dust from the canteen, playground, dormitory, and school gate to date. The average HMs concentration in campus dusts ranked Pb (83.5 mg kg-1) > Cu (70.2 mg kg-1) > Zn (47.2 mg kg-1) > Cr (46.0 mg kg-1) > Ni (22.7 mg kg-1) > As (15.2 mg kg-1) > Cd (3.38 mg kg-1). The HMs would more likely to accumulate in dormitory dust and canteen dust. In the downtown area, Zn, As, and Cd had been preliminarily identified from fossil fuel combustion and natural geochemical processes. Cu and Pb would source from cooking and traffic transportation. Ni and Cr would likely reflect the contributions of natural soil weathering. Although, no significant non-carcinogenic health risks were found to students or teachers from campus dust. Their children would more likely to exposure health risks when eating in the canteen, playing on the playground, or walking around the school gate. While the incremental lifetime cancer risk values revealed respiratory intake of HMs does not pose a carcinogenic risk on the campus.

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