RESUMEN
Concentrations of heavy metals, namely, cadmium, copper, zinc, lead, and chromium were measured in the muscle tissue of Scomberoides commersonnianus and Cynoglossus arel from the northern waters of the Oman Sea. Human health risk assessment for Iranian child and adult consumers were also evaluated. The mean concentration of zinc and copper were lower than international standards of maximum permissible limits (MPL). The estimated daily and weekly intakes (EDI and EWI) of all metals were lower than permissible tolerable daily intake (PTDI). The permissible frequency of fish consumption (CRmm) of S. commersonnianus and C. arel showed that they are safe for both children and adults even at a high meal frequency (>16 meals/month). Target hazard quotient (THQ) and risk index (HI) values were higher than 1 for Cu in adults, Cu and Zn in children with consumption rate of 7 times per week. Therefore, consumption of these spices of Oman Sea more than 7 times per week can threaten the health of consumers.
Asunto(s)
Metales Pesados , Oligoelementos , Contaminantes Químicos del Agua , Animales , Monitoreo del Ambiente , Contaminación de Alimentos/análisis , Humanos , Irán , Metales Pesados/análisis , Omán , Medición de Riesgo , Oligoelementos/análisis , Contaminantes Químicos del Agua/análisisRESUMEN
The distribution of trace elements in sediments and five commercially important fish species of the Oman Sea were assessed using an atomic absorption spectrometer to determine ecological and human health risk assessment. The ranges of trace elements concentration in sediments were: Cr: 5.42-68.94, Zn: 5.22-18.11, Cu: 1.44-4.87, As: 18.07-79.96, Cd: 0.10-1.27, Ni: 43.0-65.34 and Pb: 8.92-30.53 mg/kg dry weight. Cr, Zn, Cu, Cd and Pb were below the ERL (effects range low) and TEL (threshold effect level) values at all the sampling stations with rarely biological effects. Whereas, As and Ni were higher than ERL and TEL with occasionally biological effects. The patterns of trace elements bioaccumulation in the tissues of all species were: liver> skin> gill> muscle. A significant positive correlation suggests that trace elements accumulation in fish is determined by trace elements in sediments. Estimated Daily Intake (EDI) was significantly lower than the tolerable daily intake (TDI) value. Target Hazard quotient (THQ), total target hazard quotient (TTHQ) and target carcinogenic risk (TR) values indicated no hazard risk from fish consumption. Hence, the consumption of concerned species to people in the Oman Sea is safe.
Asunto(s)
Metales Pesados , Oligoelementos , Contaminantes Químicos del Agua , Animales , Monitoreo del Ambiente , Peces , Sedimentos Geológicos , Humanos , Metales Pesados/análisis , Omán , Medición de Riesgo , Oligoelementos/análisis , Contaminantes Químicos del Agua/análisisRESUMEN
This study was performed to determine the concentrations of copper (Cu), zinc (Zn), and lead (Pb) in the gill, liver, muscle, and tail fin tissues of Euthynnus affinis, Katsuwonus pelamis, and Thunnus albacares from Oman Sea. All samples were analyzed using a flame atomic absorption spectrophotometer and the results were expressed as µg g-1 dry weight. Metal concentrations were significantly higher in the liver than other tissues in three species (with some exceptions) (p < 0.05). The concentrations of metal accumulation in tissues of tuna species followed the Zn > Cu > Pb. Correlation matrix and principal component analysis (PCA) revealed that Zn and Pb have anthropogenic sources. Estimated daily intake (EDI) in three tuna species for heavy metals were below the tolerable daily intake (TDI). Also, the mean target hazard quotient (THQ) based on studied metals in three tuna species was below 1, which suggests that consumption of these fish can be safe for human health in the Oman Sea. Graphical Abstract .
Asunto(s)
Metales Pesados/análisis , Contaminantes Químicos del Agua/análisis , Animales , Monitoreo del Ambiente , Peces , Contaminación de Alimentos/análisis , Humanos , Omán , Medición de Riesgo , AtúnRESUMEN
The activities of selected biomarkers including 7-ethoxycoumarin-O-deethylase (ECOD) and glutathione S-transferase (GST) were measured in the red algae (Gracilaria corticata) obtained from the Oman Sea. Chemical analyses were used to assess the polycyclic aromatic hydrocarbons (PAHs) in the red algae. Total PAH concentrations in the red algae ranged from 3.61 to 8.14 ng g-1 dry weight. Mean GST and ECOD activity also varied from 8.87 to 15.32 nmol/mg protein/min and from 0.31 to 1.02 pmol/min/mg protein, respectively. Significant correlations were found between the total PAH levels and the selected biomarkers (p < 0.01). The results showed that ECOD and GST enzymes reacted to PAHs in phase I and II detoxification mechanisms of red algae (G. corticata), which extend the use of these biomarkers for investigation of the biological effects of PAH pollution as well as determination of pollution bioavailability. Environ Toxicol Chem 2019;38:1947-1953. © 2019 SETAC.
Asunto(s)
Monitoreo del Ambiente/métodos , Gracilaria/efectos de los fármacos , Hidrocarburos Policíclicos Aromáticos/toxicidad , Contaminantes Químicos del Agua/toxicidad , Animales , Biomarcadores/metabolismo , Glutatión Transferasa/metabolismo , Gracilaria/metabolismo , Océano Índico , OmánRESUMEN
This study aimed to investigate the concentration of Cd, Ni, Cr, Pb and As in the tissues of Otolithes ruber and surface sediments in the Oman Sea. Trace element concentrations were analyzed by flame atomic absorption spectrophotometer (FAAS) for ecological and health risk assessment. The results showed a significant difference in trace element concentrations of the liver, muscle and sediments between different stations (pâ¯<â¯0.05). Potential ecological risk index (PER) indicated very high risk for Cd at all stations. Estimated daily intake (EDI) for consumption of Otolithes ruber for Cr, Pb and As was lower than tolerable daily intake (TDI). The mean target hazard quotient (THQ) of Cd and Ni were higher than 1 at all stations. Target cancer risk (TR) for Ni and As were higher than the acceptable value range at all stations. Accordingly, the risk of cancer due to the long-term consumption of this fish can be concerned.
Asunto(s)
Monitoreo del Ambiente/métodos , Sedimentos Geológicos/química , Metales Pesados/análisis , Perciformes/metabolismo , Oligoelementos/análisis , Contaminantes Químicos del Agua/análisis , Animales , Humanos , Irán , Medición de Riesgo , Alimentos MarinosRESUMEN
In this study, selected biomarkers-Phytochelatin (PC) and Metallothionein (MT)- were measured in the brown algae (i.e., Cystoseria indica) obtained from the Gulf of Oman. Chemical analyses were performed to measure the concentration of heavy metals (Cd, Cu, Zn, Pb, Hg, Ni, and Cr) in the brown algae. Zn had the highest concentration followed by Cr>Ni>Cu>Pb>Cd>Hg. Performing a spatial analysis revealed that heavy metals had a significant difference (pâ¯<â¯0.05) among sampling sites. Mean PC and MT ranged between 5 and 13 amol/cell and 105-134⯵g/g ww, respectively. Significant correlations were found between heavy metal (Cd, Cu, Zn, Pb, Ni, and Cr) concentrations and MT. However, statistically significant correlations were only found between heavy metals (Cd, Zn) and PC (pâ¯<â¯0.01). The results showed that PC reacts to heavy metals less than MT in brown algae (C. indica) which limits the use of PC in heavy metals biomonitoring.