Trace Metal Concentrations in Marine Zooplankton from the Western Bay of Bengal (original) (raw)
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Trace Metal Concentrations in Zooplankton from the Eastern Arabian Sea and Western Bay of Bengal
Environmental Forensics, 2008
Trace metal contents in zooplankton samples were estimated as a part of the Marine Research-Living Resource program at 24 stations in the Bay of Bengal (November, 2002) and 29 stations in the Arabian Sea (September-October, 2003) during the Cruises 209 and 217 of the Fishery and Oceanographic Research Vessel Sagar Sampada. The average metal concentrations in the Bay of Bengal zooplankton (Fe, 14,073 µg g −1 ; Co, 24.2 µg g −1 ; Ni, 29.5 µg g −1 ; Cu, 46.2 µg g −1 ; Zn, 2000 µg g −1 ; Cd, 18.7 µg g −1 ; and Pb, 6.55 µg g −1) were found to be higher of comparable magnitudes than the Arabian Sea zooplankton (Fe, 1786 µg g −1 ; Co, 14.2 µg g −1 ; Ni, 18.6 µg g −1 ; Cu, 21.5 µg g −1 ; Zn, 374 µg g −1 ; Cd, 16.5 µg g −1 ; and Pb, 4.0 µg g −1). The spatial variability of metal contents in zooplankton from both basins indicates that it is markedly enriched in coastal samples than offshore samples. The metal enrichment in zooplankton from the coastal areas of the eastern Arabian Sea occurs due to a combined effect of upwelling, riverine, and anthropogenic sources, whereas the latter two are only dominating in the coastal Bay of Bengal zooplankton. A comparison of average trace metal concentrations in the zooplankton from the Arabian Sea and Bay of Bengal showed that the enrichment of Fe, Zn, Cd, Ni, Cu, and Pb in the Bay of Bengal zooplankton may be due to high bioaccumulation factor of these elements, whereas the slight Co enrichment may be due to the bioavailability of this metal in the seawater.
Trace metal analysis in zooplankton from Dandi creek -west coast of India
Zooplankton was sampled from Dandi creek -west coast of India (190, 48.041’N and 720, 41.255’E) on monthly basis from September 2009 to September 2010.Three stations were selected for collection of zooplankton, station 1 was in the open sea, station 2 was in the mouth of the creek and station 3 was in the creek. These stations covered an area of 12 km long and the depth varied from 2.7 to 25.5 meters (average 13.22 m). Five metals including Cadmium (Cd), Chromium (Cr), Lead (Pb), Mercury (Hg) and Arsenic (As) were analyzed in the zooplankton using Plasma Emission Spectrometer. Out of these five metals Arsenic (As) and Mercury (Hg) were not detected in zooplankton sample throughout the study period. The concentration of heavy metals shows variation in open sea, mouth of the creek and inner creek area .
HEAVY METALS IN BRACKISH WATER ZOOPLANKTON AT NAGORE COASTAL REGION, SOUTHEAST COAST OF TAMILNADU
The present study was carried out to determine the heavy metal in brackish water Zooplankton of the Cauvery river basin at Nagore coastal region, Southeast coast of Tamilnadu during October 2015 to September 2016 by taking samples from Nagore Cauvery river basin and Nagore Pattanachcheri village. Zooplankton was analyzed quali- and quantitatively. The Monthly variations of physico-chemical parameters viz: temperature, salinity, pH, dissolved oxygen and nutrients of the environment are the factors which mainly influence the production and successful propagation of planktonic life in the coastal biotopes. In this study, the heavy metals in brackish water Zooplankton such as Copper (Cu), Zinc (Zn), Cadmium (Cd), Mercury (Hg), Chromium (Cr) and Iron (Fe) were analyzed in the Sediment samples. The sample analysis was done by microwave assisted digestion and Atomic Absorption Spectrophotometer (AAS). Concentrations of heavy metals in brackish water zooplankton were corrected for metals contributed by particulate matter adhering to zooplankton organisms. The ecotoxicological importance of heavy metal uptake was apparent within the brackish water zooplankton. The presence of heavy metals in brackish water causes hazardous impact on the aquatic organisms. They are released in large concentration through effluent discharges from fiber boat industry, dry fish form issue, metal processing, paints and pigment production, biocides production, and through domestic sewage from nearby villages. The ranges of heavy metals in brackish water Zooplankton such as Copper (Cu), Zinc (Zn), Cadmium (Cd), Mercury (Hg), Chromium (Cr) and Iron (Fe) were: 5.03-42.3; 26.4-75.26; 4.89-17.14; 0.012-0.112; 0.05-4.29 and 0.3-0.98 and 5.67-81.26; 26.45-69.32; 5.42-8.72; 0.016-0.163; 0.14- 5.2 and 0.4-0.64 respectively. Finally, the suitability of zooplankton as an adequate biological indicator of heavy metal pollution in coastal environments is discussed.
Journal of Taibah University for Science
Three marine organisms Mugil cephalus, Portunus pelagicus and Penaeus indicus were gathered from the Vellar and Uppanar estuaries, Southeast Coast of India. Their muscle tissues, gills, gonads, and skin were investigated for the presence of some trace elements, by Inductively Coupled Plasma-Optical Emission Spectrometry. The results showed that the Aluminum concentration level was observed to be greatest in all of the examined marine organisms followed by Zn, Cu, Pb and Cd. The highest level of Aluminum observed in skin, gonad and gill of mullet fish followed by crab gonad and shrimp muscle respectively. Vellar estuarine organisms showed significantly lower concentrations of heavy metals compared to organisms obtained from the Uppanar estuary. The minimum level of Cadmium was observed in all the tissues of the studied marine organisms. None of the trace metals investigated in Vellar and Uppanar estuaries was over the extreme allowable level endorsed by CODEX.
Trace metal variability in near shore waters along the central west coast of India
2017
Copper (Cu), zinc (Zn), lead (Pb) and cadmium (Cd) concentrations in water and zooplankton were studied along the central west coast of India to assess spatial and temporal variations. The water and zooplankton samples were collected during different seasons. They were subjected to AAS to know the metal concentrations. Results showed that zinc showed higher concentrations at the study sites while cadmium showed the least content. Anthropogenic sources did not seem to significantly influence the metal concentrations in water and zooplankton.
Journal of Environmental Health Science and Engineering, 2013
Study on the accumulation level of heavy metals was conducted on sediment and fishes from estuaries of Bay of Bengal. Heavy metals were determined by using Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES) and the results were compared to permissible limits of WHO/USEPA. The accumulation patterns of Fe and Cd were found predominantly in all samples tested when correlated with other metals. It was found that the concentration of metals such as Cd (3.90 ± 0.25 μg/g), Cr (0.44 ± 0.05 μg/g), Ni (0.33 ± 0.01 μg/g), and Mn (1.1 ± 0.11 μg/g) were exceeding the permissible limit, whereas Fe, Co, Pb, and Zn were found within the limit of WHO/USEPA at station 1. In station 2, Cd (16.5 ± 0.4 μg/g), Mn (0.67 ± 0.11 μg/g), and Cr (0.80 ± 0.01 μg/g) were exceeding the permissible limit, whereas Fe, Co, Pb, Ni, and Zn were found within the limit. This study emphasizes that Cd and Mn levels in both stations, are far higher than the acceptable values set by WHO/USEPA and may therefore present human health hazards. It is therefore mandatory to carry out extensive research to evaluate the possible environmental risk factors in the vicinity of both estuaries with respect to heavy metals.
Eminence of heavy metal accumulation in fishes and crustaceans from the Gulf of Khambhat, India
Current science, 2015
Accumulation of heavy metals in some commercially important fish and crustacean species in the Gulf of Khambhat reveals that Pb and Cd are relatively higher than the standards prescribed in countries other than India. However, the concentrations were comparatively lower than the Marine Product Export Developmental Authority of India standards. The greater bioaccumulation of these metals may be due to anthropogenic activities, unusual physical oceanographic conditions and effluent discharges from the industries located in the vicinity. The conspicuous metal accumulation pattern among the fishes collected near oil rigs and ship braking yard indicates the presence of bioavailable toxic metals from these industries.
The objective of the present study was to characterize the concentrations of selected dissolved trace metals in the coastal waters (500 m from shore) of Kalpakkam, Tamil Nadu, India. The order of dissolved concentration of these metals was found to be as follows: Co (cobalt) , Cd (cadmium) , Cr (chromium) , Mn (manganese) , Cu (copper) , Ni (nickel) , Pb (lead) , Zn (zinc). The levels of these trace metals were found to be relatively low as compared to the reported values for other Indian coastal waters, which indicates negligible pollution at this location. Cadmium was the only metal found to increase its concentration during the monsoon period, suggesting its allochthonous input. Factor analysis indicated that chromium, nickel, zinc, cobalt, copper, manganese, and lead were of common origin, and external inputs through land runoff had nominal or little impact, typifying in-situ regeneration and remineralization linkage with their temporal variation. However, levels of zinc, cobalt, and copper remained relatively high during the summer period, and abrupt increases in their concentration during December (monsoon season) may be due to their dual (autochthonous as well as allochthonous) input. Water Environ. Res., 85, 696 (2013).
The objective of the present study was to characterize the concentrations of selected dissolved trace metals in the coastal waters (500 m from shore) of Kalpakkam, Tamil Nadu, India. The order of dissolved concentration of these metals was found to be as follows: Co (cobalt) , Cd (cadmium) , Cr (chromium) , Mn (manganese) , Cu (copper) , Ni (nickel) , Pb (lead) , Zn (zinc). The levels of these trace metals were found to be relatively low as compared to the reported values for other Indian coastal waters, which indicates negligible pollution at this location. Cadmium was the only metal found to increase its concentration during the monsoon period, suggesting its allochthonous input. Factor analysis indicated that chromium, nickel, zinc, cobalt, copper, manganese, and lead were of common origin, and external inputs through land runoff had nominal or little impact, typifying in-situ regeneration and remineralization linkage with their temporal variation. However, levels of zinc, cobalt, and copper remained relatively high during the summer period, and abrupt increases in their concentration during December (monsoon season) may be due to their dual (autochthonous as well as allochthonous) input. Water Environ. Res., 85, 696 (2013).
Heavy metal levels in ichthyoplankton of the Lower Ganges.pdf
s. Ten years (1999-2008) of observations in the Gangetic delta region in northwestern Bay of Bengal clearly indicate that the heavy metal concentrations in the commercially important fish juvenile tissue have increased in the western sector (in the Hugli estuary), where as in the central part of the deltaic complex the picture has reversed (in the Matla estuary). Increased dilution due to Himalayan glacier melting along with rapid rate of industrialization and urbanization in the western part of Gangetic delta may be attributed for such spatial variation of heavy metals level in the juvenile fish tissue. In both the sectors, heavy metals accumulated in the juvenile fish muscles in the order Zn > Cu > Pb.