Accumulation and distribution of Cd, Cu, Pb and Zn in the soft tissue and shell of oysters collected from the northern coast of Qeshm Island, Persian Gulf, Iran

Shirneshan, Golshan; Bakhtiari, Alireza Riyahi

doi:10.3184/095422912x13394368814321

Cited by 21 publications

(6 citation statements)

References 19 publications

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“…Previous study has reported that, oyster C. virginica, was unable to eliminate accumulated metals from their soft tissue even after depuration [49]. This condition is attributed to the presence of metallothionein, a cysteine-rich protein that has high affinity to heavy metals [50] which accumulate inside the cells in a non-toxic form [49]. Metallothioneins are responsible in the homeostasis of essential metals (Zn and Cu), detoxification of toxic metals (especially Cd) as well in scavenging free radicals [51].…”

Section: Metal Pollution Indexmentioning

confidence: 98%

Health Risk Assessment Due to Heavy Metals Exposure via Consumption of Bivalves Harvested from Marudu Bay, Malaysia

Denil¹,

Ching²,

Ransangan³

2017

OJMS

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Concern over health risk from consumption of bivalves originating from Marudu Bay is escalating due to the rapid agricultural development surrounding the bay. This has motivated us to estimate the health risk index (HRI) of heavy metals from four commercially important and highly exploited bivalve species which are abundant in the bay. Samples (n = 30) of green mussel (Perna viridis), Asiatic hard clam (Meretrix meretrix), Pacific oyster (Crassosstrea gigas) and marsh clam (Polymesoda expansa) were acquired from fishermen in Kg. Teritipan, Marudu Bay. These bivalves were analyzed for heavy metals content using the Inductively Couples Plasma-Optical Emission Spectroscopy (ICP-OES). The study found that the mean contents of Arsenic (As) and Manganese (Mn) in all analyzed bivalves exceeded the permissible limits as well as copper (Cu), lead (Pb) and zinc (Zn) in Pacific oyster, and Zn in marsh clam. It was also noticed that consumption of different bivalve species may bring about health risk from different metals as indicated by varied Total Hazard Index (THI) values. Consumption of the four bivalves was noticed to promote high health risk from As intoxication. Although metal pollution index (MPI) analysis revealed that the bivalves from the bay are currently not seriously impacted by heavy metal pollution, vigorous efforts should be taken to preserve the natural condition of the bay for years to come. There are several ways to minimize health issues from bivalve consumption which include keeping the bivalve natural habitat away from heavy metals pollution by strictly enforcing environmental laws and policies, establishing zones for bivalve fisheries, monitoring heavy metals concentration in bivalve on a regular basis and making depuration process a compulsory requirement in every seafood restaurant throughout the country.

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Section: Metal Pollution Indexmentioning

confidence: 98%

Health Risk Assessment Due to Heavy Metals Exposure via Consumption of Bivalves Harvested from Marudu Bay, Malaysia

Denil¹,

Ching²,

Ransangan³

2017

OJMS

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“…Nedjelja (2.44 µg g −1 ) and Cogi (2.57 µg g −1 ) were higher than in conchixes of mussels from the same locations (2.07 µg g −1 and 1.6 µg g −1 , respectively). Mussels filter high amounts of water daily; therefore, they accumulate trace metals, which contribute to much higher content in the soft tissues than in ambient water [39]. However, despite different accumulation capacities, both soft tissues and shells can be used as bioindicators due to their ability to accumulate metals [40].…”

Section: Discussionmentioning

confidence: 99%

Shell Organic Matrix (Conchix) of the Mediterranean Mussel Mytilus galloprovincialis L. as the Medium for Assessment of Trace Metals in the Boka Kotorska Bay

et al. 2023

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The content of trace metals, namely Zn, Cu, Fe, Mn, Pb, Cd, and Hg, in four types of media, i.e., soft tissues, shells, and the products of shell demineralization (organic matrix—conchix and extract) of the Mediterranean mussel Mytilus galloprovicialis L., at three sites in the Boka Kotorska Bay of the Adriatic Sea were determined. The main aim was to investigate the accumulation patterns of trace metals in conchix and their possible relationship with other tested media. Conchix weight within a group of mussels from Sv. Nedjelja was significantly higher in comparison with the IMB, while conchix % in the shell showed a negative correlation with dry shell weight. The highest metal pollution index (MPI) values found in the soft tissues of mussels from Sv. Nedjelja, Cogi, and the IMB were 2.319, 2.711, and 2.929 µg g−1, respectively. PCA analysis showed similarities in trace metal accumulation in all media except conchix. According to CCA analysis, conchixes were grouped around Cu, Fe, and Hg, while Cd and Zn were in correlation with the soft tissues. Moreover, the shells were in correlation with Mn. Simple isolation with high yield, close contact to the environment in comparison with calcified shell layers, and susceptibility to possible pollution sources due to the accumulation of specific metals are the main reasons to consider conchix of M. galloprovincialis as a medium with potential in trace metal assessments of marine ecosystems.

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“…As coastal populations grow and the use of prescription and nonprescription pharmaceuticals continues to rise (Gu et al, 2010), it is increasingly important to develop effective monitoring strategies and tools to detect changes and understand the effects of multiple contaminants on marine organisms and the humans who consume them. (Shirneshan and Bakhtiari, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…The PCA was performed in R version 3.1.3 (R Development Core Team, 2015). Biota-sediment accumulation factors (BSAFs) compare the concentration of a given contaminant measured in an organism to the concentration of the contaminant measured in the sediment (Shirneshan and Bakhtiari, 2012). BSAFs were calculated by dividing the summer 2013 oyster tissue concentration by the sediment concentration.…”

Section: Quality Control and Reportingmentioning

confidence: 99%

“…Biota-sediment accumulation factors (BSAFs) compare the concentration of a given contaminant measured in an organism to the concentration of the contaminant measured in the sediment (Shirneshan and Bakhtiari, 2012). Calculated BSAFs were N2 for DDTs, chlordanes, PBDEs, and PCBs (Table 7), indicating that oysters are macroconcentrators of these compounds (Franklin et al, 2010).…”

Section: Comparison Of Oyster Tissue and Sedimentmentioning

confidence: 99%

See 1 more Smart Citation

Spatial and temporal variability of contaminants within estuarine sediments and native Olympia oysters: A contrast between a developed and an undeveloped estuary

Granek

Conn

Nilsen

et al. 2016

Science of The Total Environment

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Chemical contaminants can be introduced into estuarine and marine ecosystems from a variety of sources including wastewater, agriculture and forestry practices, point and non-point discharges, runoff from industrial, municipal, and urban lands, accidental spills, and atmospheric deposition. The diversity of potential sources contributes to the likelihood of contaminated marine waters and sediments and increases the probability of uptake by marine organisms. Despite widespread recognition of direct and indirect pathways for contaminant deposition and organismal exposure in coastal systems, spatial and temporal variability in contaminant composition, deposition, and uptake patterns are still poorly known. We investigated these patterns for a suite of persistent legacy contaminants including polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) and chemicals of emerging concern including pharmaceuticals within two Oregon coastal estuaries (Coos and Netarts Bays). In the more urbanized Coos Bay, native Olympia oyster (Ostrea lurida) tissue had approximately twice the number of PCB congeners at over seven times the total concentration, yet fewer PBDEs at one-tenth the concentration as compared to the more rural Netarts Bay. Different pharmaceutical suites were detected during each sampling season. Variability in contaminant types and concentrations across seasons and between species and media (organisms versus sediment) indicates the limitation of using indicator species and/or sampling annually to determine contaminant loads at a site or for specific species. The results indicate the prevalence of legacy contaminants and CECs in relatively undeveloped coastal environments highlighting the need to improve policy and management actions to reduce contaminant releases into estuarine and marine waters and to deal with legacy compounds that remain long after prohibition of use. Our results point to the need for better understanding of the ecological and human health risks of exposure to the diverse cocktail of pollutants and harmful compounds that will continue to leach from estuarine sediments over time.

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Accumulation and distribution of Cd, Cu, Pb and Zn in the soft tissue and shell of oysters collected from the northern coast of Qeshm Island, Persian Gulf, Iran

Cited by 21 publications

References 19 publications

Health Risk Assessment Due to Heavy Metals Exposure via Consumption of Bivalves Harvested from Marudu Bay, Malaysia

Health Risk Assessment Due to Heavy Metals Exposure via Consumption of Bivalves Harvested from Marudu Bay, Malaysia

Shell Organic Matrix (Conchix) of the Mediterranean Mussel Mytilus galloprovincialis L. as the Medium for Assessment of Trace Metals in the Boka Kotorska Bay

Spatial and temporal variability of contaminants within estuarine sediments and native Olympia oysters: A contrast between a developed and an undeveloped estuary

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