Sadakathullah Appa College Autonomous

Tirunelveli, India

Sadakathullah Appa College Autonomous

Tirunelveli, India

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Khan M.F.,Sadakathullah Appa College Autonomous | Wesley S.G.,Scott Christian College Autonomous
Radiation Protection Dosimetry | Year: 2011

Activities of 210Po and 210Pb in various tissues of two common species of cephalopod molluscs (cuttlefishes) of Kudankulam coast were studied. Of all the tissues, 210Po and 210Pb were found accumulated more in the digestive gland, shell gland and intestine. Urotheuthis duvauceli accumulated more 210Po and 210Pb in certain organs when compared with Sepiella inermis. The activity ratio of 210Po/210Pb fell within the range of 0.6-29.3 in the organs. The biological concentration factor for the organs ranged from 1.2×103 to 2×105 for 210Po and 3.6×102 to 7.6×104 for 210Pb. A significant variation in the accumulation of 210Po and 210Pb was noted between species, organs and seasons (p < 0.05). The whole-body internal dose rate due to 210Po was 1.24 and 0.83 μGy h-1 and it was 2×10-3 and 3×10-3 μGy h-1 due to 210Pb for both the species. The effective dose in humans due to 210Po intake ranged from 96.3 to 376.6 μSv y-1 and that of 210Pb ranged from 35.2 to 105.7 μSv y-1, respectively. The data generated will act as a reference database for these organisms of this coast in which a nuclear power station is under construction. © Crown copyright 2010.


Khan M.F.,Sadakathullah Appa College Autonomous | Godwin Wesley S.,Scott Christian College Autonomous
Marine Pollution Bulletin | Year: 2011

The activities of 210Po and 210Pb were determined in commonly consumed seafoods to evaluate the internal exposure and risk to humans residing Kudankulam coast where a mega nuclear power plant is under construction. The concentration of 210Po in seafoods ranged from 1.2±0.7 to 248±8.1Bqkg-1. Meanwhile, 210Pb ranged between 1.1±0.05 and 14.8±1.6Bqkg-1. The committed effective dose (CED) due to 210Po and 210Pb varied from 11.04 to 515.6 and 3.93 to 23.5μSvyr-1, respectively. The lifetime cancer risk for the public due to 210Po was in the range of 3.47×10-5-1.62×10-3 and it was 4.03×10-5-1.96×10-4 due to 210Pb. The activity intake, effective dose and cancer risk was found lesser than international guidelines and the seafood intake was considered to be safe for human consumption. © 2010 Elsevier Ltd.


Feroz Khan M.,Sadakathullah Appa College Autonomous | Umarajeswari S.,Scott Christian College Autonomous | Godwin Wesley S.,Scott Christian College Autonomous
Journal of Environmental Monitoring | Year: 2011

Activities of 210Po and 210Pb in whole-body and in various tissues of brachyuran crabs collected along the Kudankulam coast were studied. A non-uniform distribution of these radionuclides was observed between the various tissues. Of all the tissues, 210Po and 210Pb were found to accumulate more in the hepatopancreas and intestine. Among the crabs studied, Charybdis lucifera registered higher 210Po and 210Pb activity. Muscle tissue in all the species registered lower activity. The 210Po/210Pb activity ratio was found to be greater than unity. The biological concentration factor for organs varied between ∼104 and 106 for 210Po and ∼102 and 104 for 210Pb. A significant variation in the accumulation of 210Po and 210Pb was noted between species and between seasons (p < 0.05). The mean whole-body internal dose ranged from 1.42 to 6.86 μGy h-1 for 210Po and from 3.0 × 10-3 to 8.0 × 10-3 μGy h -1 for 210Pb. The external dose for 210Po and 210Pb was 2.41 × 10-6 to 5.76 × 10 -6 μGy h-1 and 4.14 × 10-5 to 8.26 × 10-5 μGy h-1, respectively. The activity levels recorded are in agreement with values recorded in related organisms in other parts of the world. The total committed effective dose due to the intake of both radionuclides ranged from 80.3 to 871.7 μSv y-1. The median dose calculated due to 210Po and 210Pb in certain crabs in Kudankulam is less and would not pose any significant radiological impact on health or a cancer risk to the public, and the seafood is considered safe for human consumption. © 2011 The Royal Society of Chemistry.


Feroz Khan M.,Sadakathullah Appa College Autonomous | Godwin Wesley S.,Scott Christian College Autonomous
Marine Pollution Bulletin | Year: 2012

Protection of non-human biota from ionizing contaminants, especially in the vicinity of nuclear installations is a very important aspect for nuclear engineers and ecologists. In this view, a baseline data on the activity concentration of 210Po and 210Pb were quantified in different tissues of molluscs inhabiting the intertidal region along the coast of Kudankulam. The activity concentration was noticed higher in the organs associated with digestion and metabolism. Filter feeding bivalve molluscs registered the maximum activity of 210Po in their whole body compared to grazing gastropods. 210Po: 210Pb ratio was calculated to be greater than unity in most of the analysed tissues. The ecological sensitivity of molluscs to the radiation exposure and the safeness of the environment was analysed by calculating the external and internal dose rate. The hazard quotient for molluscs was lesser than the global bench mark dose rate of 10μGyh -1. © 2011 Elsevier Ltd.


Khan M.F.,Sadakathullah Appa College Autonomous | Wesley S.G.,Scott Christian College Autonomous
Marine Pollution Bulletin | Year: 2012

Baseline activity concentration of 137Cs, 210Po and 210Pb was determined for 25 resident and 22 migratory fish species collected in a so-called wedge bank region in the extreme south of India. A nuclear power station is now under construction at Kudankulam near the target region and the data provide background information on the radionuclide activity concentration in the region. Three-way ANOVA revealed no significant variation in the concentrations of 137Cs, 210Po and 210Pb between species based on feeding habit, habitat and migratory pattern except the effect of feeding habit on 210Po concentration (p<0.05). The annual dose due to radionuclide ingestion through the fishes was calculated based on the survey results of fish consumption rates for the local population. The dose due to 137Cs was negligibly small while those due to 210Po and 210Pb varied from 1.2 to 36.9 and 0.2 to 2.9μSvyr-1, respectively. © 2012 Elsevier Ltd.


Khan M.F.,Sadakathullah Appa College Autonomous | Benjamin J.,Scott Christian College Autonomous | Wesley S.G.,Scott Christian College Autonomous
Toxicological and Environmental Chemistry | Year: 2011

Naturally occurring 210Po and anthropogenic 137Cs were determined in edible marine organisms consumed by humans along the southeast coast of India, where a mega nuclear power station is situated. The edible molluscan species showed elevated 210Po activity compared to crustaceans and fish. However, 137Cs was detected only in fish. The radiotoxicity due to 210Po was evaluated by calculating the effective dose and carcinogenic risk to humans consuming these species. The results revealed that 210Po contributed 99% to the dose as opposed to 137Cs and the estimated risk exerted no significant health hazard to humans. Data generated may help in assessing any future contamination. © 2011 Taylor & Francis.


Khan M.F.,Sadakathullah Appa College Autonomous | Wesley S.G.,Scott Christian College Autonomous
Environmental Monitoring and Assessment | Year: 2012

The globally distributed fallout radionuclide 137Cs was monitored in 25 resident and 22 migratory fish species collected from some regions of west and east coast of southern India to establish a baseline data. The samples were collected during June 2008 to June 2009. Higher level of 137Cs was noted in planktivorous fishes and lower level in herbivores. A significant variation in 137Cs was observed between fishes with different feeding habits and different migratory pattern. Oceanodromic migratory fishes displayed higher cesium levels than other migratory types. Similarly, migratory fishes displayed higher 137Cs concentration compared to resident fishes. The overall range of 137Cs varied from 0.06 to 0.3 Bq/kg in fishes. The biological concentration varied from 55 to 250. The average external dose rate to fishes was calculated to be 2.7 × 10 -7 μGy/h, while the internal dose rate varied from 8.50 × 10 -6 to 5.27 × 10 -5 μGy/h. The hazard quotient for fishes was found to be less than 1. The average intake of 137Cs via fishes to the public was calculated to be 3.5 Bq/year and subsequently the committed effective dose was 0.05 μSv/year. The data obtained were less than global average and comparable to those of many regions. © Springer Science+Business Media B.V. 2011.


PubMed | Sadakathullah Appa College Autonomous
Type: Journal Article | Journal: Marine pollution bulletin | Year: 2011

The activities of Po and Pb were determined in commonly consumed seafoods to evaluate the internal exposure and risk to humans residing Kudankulam coast where a mega nuclear power plant is under construction. The concentration of Po in seafoods ranged from 1.2 0.7 to 248 8.1 Bq kg. Meanwhile, Pb ranged between 1.1 0.05 and 14.8 1.6 Bq kg. The committed effective dose (CED) due to Po and Pb varied from 11.04 to 515.6 and 3.93 to 23.5 Sv yr, respectively. The lifetime cancer risk for the public due to Po was in the range of 3.47 10- 1.62 10 and it was 4.03 10 - 1.96 10 due to Pb. The activity intake, effective dose and cancer risk was found lesser than international guidelines and the seafood intake was considered to be safe for human consumption.


PubMed | Sadakathullah Appa College Autonomous
Type: Journal Article | Journal: Marine pollution bulletin | Year: 2012

Baseline activity concentration of (137)Cs, (210)Po and (210)Pb was determined for 25 resident and 22 migratory fish species collected in a so-called wedge bank region in the extreme south of India. A nuclear power station is now under construction at Kudankulam near the target region and the data provide background information on the radionuclide activity concentration in the region. Three-way ANOVA revealed no significant variation in the concentrations of (137)Cs, (210)Po and (210)Pb between species based on feeding habit, habitat and migratory pattern except the effect of feeding habit on (210)Po concentration (p<0.05). The annual dose due to radionuclide ingestion through the fishes was calculated based on the survey results of fish consumption rates for the local population. The dose due to (137)Cs was negligibly small while those due to (210)Po and (210)Pb varied from 1.2 to 36.9 and 0.2 to 2.9Sv yr(-1), respectively.


PubMed | Sadakathullah Appa College Autonomous
Type: Journal Article | Journal: Environmental monitoring and assessment | Year: 2012

The globally distributed fallout radionuclide (137)Cs was monitored in 25 resident and 22 migratory fish species collected from some regions of west and east coast of southern India to establish a baseline data. The samples were collected during June 2008 to June 2009. Higher level of (137)Cs was noted in planktivorous fishes and lower level in herbivores. A significant variation in (137)Cs was observed between fishes with different feeding habits and different migratory pattern. Oceanodromic migratory fishes displayed higher cesium levels than other migratory types. Similarly, migratory fishes displayed higher (137)Cs concentration compared to resident fishes. The overall range of (137)Cs varied from 0.06 to 0.3Bq/kg in fishes. The biological concentration varied from 55 to 250. The average external dose rate to fishes was calculated to be 2.7 10(-7)Gy/h, while the internal dose rate varied from 8.50 10(-6) to 5.27 10(-5)Gy/h. The hazard quotient for fishes was found to be less than 1. The average intake of (137)Cs via fishes to the public was calculated to be 3.5Bq/year and subsequently the committed effective dose was 0.05Sv/year. The data obtained were less than global average and comparable to those of many regions.

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