scholarly journals Higher bioavailability of Cu and Zn in the eastern part of Johore Causeway: Will the pattern remain the same beyond 2030?

2021 ◽  
Vol 6 (4) ◽  
pp. 139-141
Author(s):  
Chee Kong Yap ◽  
Shih Hao Tony Peng ◽  
Chee Wah Yap ◽  
Wen Siang Tan ◽  
Mohamad Saupi Ismail
Keyword(s):  
Metal Contamination ◽  
Soft Tissues ◽  
Anthropogenic Activities ◽  
Perna Viridis ◽  
Metal Levels ◽  
High Metal ◽  
Zn Bioavailability ◽  
Constant Source ◽  
Cu And Zn

The purpose of this paper is to discuss Cu and Zn concentrations in Perna viridis soft tissues from the western and eastern parts of Johore Singapore Causeway. The polluted eastern portion of the Causeway had greater levels of Cu and Zn in different areas of the soft tissues of mussels than the western part. This indicated the eastern section of the semi-enclosed Causeway had higher Cu and Zn bioavailability than the western part. With some reports of high metal levels in the eastern part of the Causeway from 2015 to 2018, it is predicted that there will be a plausible constant source of anthropogenic metal contamination in the eastern part of the Causeway beyond 2030 if anthropogenic activities are not effectively controlled.

scholarly journals An Assessment of the Bivalve Perna viridis, as an Indicator of Heavy Metal Contamination in Paradise Point of Karachi, Pakistan

2016 ◽  
Vol 59 (3) ◽  
pp. 164-171
Author(s):  
Rashida Qari ◽  
Olufemi Ajiboye ◽  
Saima Imran ◽  
Abdul Rahim Afridi
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Contamination ◽  
Soft Tissues ◽  
Heavy Metal Contamination ◽  
Human Consumption ◽  
Perna Viridis ◽  
High Accumulation ◽  
Accumulation Of Metals ◽  
Mn Concentrations

The edible bivalves Perna viridis (green mussel), (n = 100) were analysed for their total Hg,Pb, Cu, Ni, Zn, Co, Fe, Cr, Cd, and Mn concentrations to indicate heavy metal contamination in ParadisePoint of Karachi coast using atomic absorption spectrophotometer. There are large seasonal variations inthe metal concentrations of Mn (0.025-0.67 µg/g), Fe (0.055-7.740 µg/g), Ni (0.004-0.52 µg/g), Hg (0.0001-0.004 µg/g), Zn (0.04-3.32 µg/g), Cu (0.008-1.66 µg/g), Pb (0.022-2.43 µg/g), Co (0.01-0.044 µg/g), Cd(0.04-0.88 µg/g) and Cr (0.13-1.20 µg/g) recorded in bodies/soft tissues of P. viridis obtained in the samplesof the year 1993 and 2012 at the Paradise Point of Karachi coast. The results of heavy metals are in thefollowing descending order of concentration in the samples collected in the year 1993: Fe>Cr>Zn>Mn>Pb>Cd>Cu>Ni>Co>Hg, while Fe>Zn>Pb>Cu>Cr>Cd>Mn>Ni>Co>Hg order was recorded in samplescollected in the year 2012. The high accumulation of metals was found mostly in the samples collectedin the year 2012 when compared with the samples of the year 1993. This is an indication that the areaunder study showed signs of being exposed to significant levels of heavy metal pollution due to directdischarge of industrial and domestic wastes along the coast. The concentrations of these heavy metals werelower than the permissible limits for human consumption. However, if this pollution persists, it can proveto be very detrimental in future.

scholarly journals Biochemical Composition and Heavy Metal Content in the Mussels of Kadiyapattinam, Kanyakumari distrct, South West Coast of India

2018 ◽  
Vol 4 (2) ◽  
pp. 244-258
Author(s):  
Immaculate Jeyasanta K ◽  
Sheeba Wilson ◽  
Narmatha Sathish ◽  
Jamila Patterson
Keyword(s):  
Heavy Metal ◽  
Biochemical Composition ◽  
Metal Contamination ◽  
Soft Tissues ◽  
Heavy Metal Contamination ◽  
Rich Source ◽  
The Other ◽  
Human Consumption ◽  
Perna Viridis ◽  
Perna Perna

Samples of the green mussel, Perna viridis, the brown mussel Perna perna and the parrot mussel were collected from Kadiyapattinam of Kanyakumari coast and their biochemical composition and the levels of heavy metal contamination were analyzed. The results of this study showed that the biochemical composition of the mussels did not very much. The specimens of all the three species of mussels were found to be good aquatic invertebrates for human consumption. P. viridis contained higher proportion of protein than Perna perna and the parrot mussel. Perna perna and the parrot mussel contained more lipid, ash, carbohydrate, and fibre; and their caloric values were also more than that of Perna viridis. Perna perna had the highest moisture content (78.21%) followed by the parrotmussel (19.47%) and Perna viridis (20.30%). Concentrations of the heavy metals (Cd, Cu, Pb, Cr, As, Ni and Se) in the edible portions of the samples were within the values recommended by the WHO. Mercury was not detected and so these mussels are safe for the consumers. The order of concentrations of minerals found in the mussel samples was: K > Na > P > Ca > Mg > Fe > Zn > Mn. Potassium content was more than the other elements. It was evident from the study that in the soft tissue of all Perna species the concentration of essential minerals was higher than the nonessential metals. Kadiyapattinam mussels are a rich source not only of protein but also of all the other micro and macro minerals. The soft tissues of all the mussels had low levels of heavy metal concentration, and this indicates a comparatively lower heavy metal contamination of Kadiyapattinam coast. Mussels are also a rich source of nutritional components and could be used as human diet in place of other fish so as to reduce the pressure on sea foods.

scholarly journals Trace Metal Contamination Characteristics and Health Risks Assessment ofCommelina africanaL. and Psammitic Sandflats in the Niger Delta, Nigeria

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Nsikak U. Benson ◽  
Paul A. Enyong ◽  
Omowunmi H. Fred-Ahmadu
Keyword(s):  
Trace Metal ◽  
Niger Delta ◽  
Anthropogenic Activities ◽  
Hazard Quotient ◽  
Risk Index ◽  
Sediment Quality ◽  
Hazard Index ◽  
Adult Males ◽  
Metal Concentrations ◽  
Metal Levels

The purpose of this study was to investigate and quantify trace metal concentrations inCommelina africanaL. and psammitic sandflats from an intertidal coastal ecosystem in Niger Delta, Nigeria, and to evaluate their spatial distribution, degree of contamination, and source apportionment. The environmental risks associated with soil contamination were elaborately assessed using potential ecological risk index, sediment quality guidelines, and enrichment relative to background levels. The mean concentrations of Cd, Cr, Ni, Pb, and Zn in sandflat soil samples are0.76±9.0×10-2,7.39±8.7×10-1,2.28±0.35,0.024±4.0×10-3, and74.51±2.55 mg/kg, respectively. Metal levels indicate strong variability with sampling sites. The order of trace metal concentrations in theCommelina africanaL. samples isZn>Ni>Cr>Pb>Cd. The concentrations varied with the sample locations; and the levels of Pb (0.05 to 0.08 mg/kg) at all locations are found to be significantly below permissible level of 0.3 mg/kg. Potential sources of metal loadings may be associated with localised or diffused anthropogenic activities. The average carcinogenic risks are below1.0×10-6threshold values, and the sandflat soils are not considered to pose significant health effects to children and adult males and females. However, the carcinogenicity and noncarcinogenicity risks ranking decrease following the orderchildren>adult  males>adult  females. Comparatively, the hazard quotient and hazard index indicate that the psammitic sandflats might pose a health risk to children in future.

Field transplantation of a freshwater bivalve, Pyganodon grandis, across a metal contamination gradient. I. Temporal changes in metallothionein and metal (Cd, Cu, and Zn) concentrations in soft tissues

1995 ◽  
Vol 52 (4) ◽  
pp. 690-702 ◽  
Author(s):  
Y. Couillard ◽  
P. G. C. Campbell ◽  
A. Tessier ◽  
J. C. Auclair ◽  
J. Pellerin-Massicotte
Keyword(s):  
Soft Tissues ◽  
Shell Growth ◽  
Mining Area ◽  
Metal Exposure ◽  
Steady Increase ◽  
Freshwater Bivalve ◽  
Slow Increase ◽  
Metal Levels ◽  
Pyganodon Grandis ◽  
Over Time

To test the response of the freshwater bivalve Pyganodon grandis (formerly Anodonta grandis) to increased metal exposure in the field, we transferred specimens (8 cm length; 4–6 years old) from a less to a more contaminated lake in the mining area of Rouyn-Noranda, in northwestern Québec. The transplanted bivalves were maintained in open enclosures placed in the bottom sediments of the contaminated lake. Up to 16 individuals were removed from pairs of enclosures at times t = 0 (June 1990), 5, 14, 30, 60, 90, and 400 d; tissue concentrations of metallothionein (MT) and metals were monitored over time. Measurements on control molluscs enclosed in their lake of origin showed that enclosure per se had no apparent effect on tissue [MT] or tissue metal levels, but did decrease shell growth. Metallothionein levels in specimens transplanted to the more contaminated lake showed a slow but steady increase with time; in contrast, MT levels in the control populations showed only modest seasonal fluctuations. The increase in MT over time in the transplanted bivalves was closely correlated with a similar slow increase in soft tissue [Cd]. We conclude that MT in the freshwater bivalve P. grandis is a promising biochemical indicator of metal exposure.

scholarly journals Butyltins, Organochlorines and Metal Levels in Green Mussel, Perna viridis L. from the Coastal Waters of the Philippines

1999 ◽  
Vol 65 (3) ◽  
pp. 441-447 ◽  
Author(s):  
Maricar Prudente ◽  
Hideki Ichihashi ◽  
Supawat Kan-atireklap ◽  
Izumi Watanabe ◽  
Shinsuke Tanabe
Keyword(s):  
Coastal Waters ◽  
The Philippines ◽  
Perna Viridis ◽  
Green Mussel ◽  
Metal Levels

Estuarine characteristics, water quality and heavy metal contamination as determinants of fish species composition in intermittently open estuaries

2017 ◽  
Vol 68 (5) ◽  
pp. 941 ◽  
Author(s):  
K. O'Mara ◽  
A. Miskiewicz ◽  
M. Y. L. Wong
Keyword(s):  
Water Quality ◽  
Species Composition ◽  
Fish Species ◽  
Metal Contamination ◽  
Fish Assemblages ◽  
Anthropogenic Activities ◽  
Estuarine Fish ◽  
Fish Diversity ◽  
Eastern Australia ◽  
Fish Species Composition

Estuaries are critical aquatic environments that are used by many fish during their life cycle. However, estuaries often suffer from poor water quality as a result of anthropogenic activities. Fish diversity studies in estuaries are common, although few have examined whether correlations exist between water quality, metal contamination and fish assemblages. In the present study we investigated the effect of abiotic conditions, heavy metals and estuary characteristics on the abundance, diversity and composition of fish in four intermittently open estuaries along the Illawarra coast of south-eastern Australia. The heterogeneity of environmental conditions was reflected in the fish assemblages in each estuary. Environmental variables predicted fish species composition, and estuaries in particularly poor condition contained few species (estuarine residents) in high abundance, indicating their ability to acclimatise and survive in conditions that are hostile to other species. Overall, these findings demonstrate that estuarine fish assemblages may be useful indicators of estuary condition and reveal the importance of managing anthropogenic activities in the surrounding catchment to improve water quality so that biodiversity of fish can be restored in these estuarine environments.

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