B.K. Kolita Kamal Jinadasa - Academia.edu (original) (raw)

Papers by B.K. Kolita Kamal Jinadasa

Sri Lanka Journal of Aquatic Sciences, 2018

Consumption of contaminated fish is the major source of the human exposure to total mercury (T-Hg... more Consumption of contaminated fish is the major source of the human exposure to total mercury (T-Hg) and methyl mercury. This study reports the fish consumption habits of three groups based on the age category and their occupation; "Children" (age 9-20 years) and two groups of "Adults" (age above 21 years) based on their occupation; "Adults-Fishermen" (fishermen) and "Adults-Other". Hair T-Hg levels were measured from 30 individuals (age 9-48 years) from Negombo area in Sri Lanka. All individuals in this survey consumed fish at least six servings per week, which belongs to the high fish consumer category (> 3 servings/week) according to World Health Organization (WHO) guidelines. The main fish groups consumed by the respondents were mainly yellow-fin tuna (YFT), skipjack tuna (SKT), kawakawa and frigate tuna and small fish such as sardines (spotted sardines, goldstripe sardine, other sardines, scads and trevallies). The majority consumed an equal amount of big fish and small fish. The average weekly fish consumption per individual varied depending on the test group (Children; 1270 g/week per person, Adults-other; 1078 g/week per person and Adults-fishermen 1852 g/week per person) which exceeded United States Food & Drug Administration (USFDA) recommended level of 340 g/ week of seafood containing low concentration of Hg. The mean hair T-Hg of respondents of Negombo population was 4.89±3.23 µg/g (range 1.60-13.38 µg/g), which exceeded the United States Environmental Protection Agency (USEPA) reference dose (1 µg/g) for T-Hg level of hair. The total hair mercury in three respondent groups (Children 3.33±1.36 µg/g, Adults-other 2.89±1.26 µg/g and Adults-Fishermen 6.08±3.62 µg/g), were not significantly different (p>0.05) from each other. Real exposure value of three respondent groups were not significantly different (p>0.05). There was a low strength positive correlation (r=0.353, p>0.05) between hair T-Hg levels with the weekly large fish consumption.

American Journal of Public Health Research, 2014

The presence of copper (Cu), iron (Fe), zinc (Zn), lead (Pb), cadmium (Cd), cobalt (Co), chromium... more The presence of copper (Cu), iron (Fe), zinc (Zn), lead (Pb), cadmium (Cd), cobalt (Co), chromium (Cr) and mercury (Hg) has been studied in ten sea cucumber (Holothurians) species in the Northwestern sea of Kalpitiya and Dutch Bay area (Sri Lanka) during October-November 2008 and 2009. The concentration of in holothurians body wall have been found to range from 1.84-9.18 mg/kg (Cu), 5.03-56.68 mg/kg (Fe), 3.68-24.38 mg/kg (Zn), <0.04-4.70 mg/kg (Cr), 0.04-2.29 mg/kg (Pb), 41.62-128.93 μg/kg (Cd), 0.07-0.25mg/kg (Co) and 24.63-445.69 μg/kg (Hg) in dry weight basis. The results show that, according to European legislation, the body wall of holothurians is generally "safe", although the high levels of iron in all holothurians are noticeable.

Mercury (Hg) is a pollutant of global importance that adversely impacts ecological and human heal... more Mercury (Hg) is a pollutant of global importance that adversely impacts ecological and human health. A total of 140 Thunnus albacores (yellowfin tuna) and 176 of Xiphias gladius (swordfish) samples collected from the Indian Ocean around Sri Lanka in the period of July 2009 to March 2010 were examined for total mercury content and used to evaluate the mercury intake of Sri Lankan population. Total mercury concentrations of muscular tissues of fish were determined using cold vapor atomic absorption spectrometry. The results indicated that the highest mercury concentration were noted in swordfish 0.90±0.52 mg/kg, wet weight and followed by yellowfin tuna (0.30±0.18 mg/kg, wet weight). The projected intake values of mercury through human consumption were calculated (µg kg -1 body wt. weekly -1) and were compared with those of provisional tolerable weekly intake (PTWI) per kg body weight as stipulated by the Food and Agriculture Organization/World Health Organization (FAO/WHO) and Joint ...

Concentrations of ten essentials and non essentialstrace metals Hg, Mg, Fe, Zn, Cu, Ni, Cr, Cd, P... more Concentrations of ten essentials and non essentialstrace metals Hg, Mg, Fe, Zn, Cu, Ni, Cr, Cd, Pb and Co were determined in the muscles of two squids (Loligoduvauceli; n=24, Sepioteuthislessoniana; n=27) and one cuttlefish (Sepia latimanus; n=12) species collected from Kalpitiya and Mannar area of Sri Lanka in 2010. Trace metals were analysed using Varian Atomic Absorption Spectroscopy (VGA, GTA and Flame AAS). The mean values of all trace metals in muscles of studied species were within the international safety limits and pooled mean concentration of trace elements were following order; Mg > Zn > Cu > Fe > Cr > Ni > Hg > Cd > Co >Pb.

Total mercury (T-Hg) concentration was measured in the hair of people who live and work in the Ne... more Total mercury (T-Hg) concentration was measured in the hair of people who live and work in the Negombo coastal area and Welimada mid country area of Sri Lanka. Hair samples were analysed for T-Hg by CVAAS (cold vapour atomic absorption spectrometry) in males (n= 52, 30 from Negombo and 22 from Welimada). Mean T-Hg level and ranged between 4.38±3.55 (>LOD-13.38) Negombo and 0.39±0.44 (>LOD-1.58) Welimada. The highest value was found in a 25 year businessman in Welimada (1.58 mg/kg), and the 28 years businessman from Negombo (13.38 mg/kg). All individuals from the Negombo area are consuming small fish to large fish ratio 1:1, and the common species are Trenched Sardines (Hurulla) and large fish like skipjack tuna (Balaya) yellowfin tuna (Kelawalla) and Treavallies (Paraw). But in some individuals in Welimada area are consuming small fish and the mean T-Hg was 0.29 mg/kg, while others have 0.67 mg/kg mean value. The 55.8% of the study population (13.6% Welimada& 86.7% Negombo) ex...

Nature and Science of Sleep

The objective of this study was to identify the presence of trace metals in Orinoco Sailfin Catfi... more The objective of this study was to identify the presence of trace metals in Orinoco Sailfin Catfish Pterygoplichthys multiradiatus from the freshwater reservoir of the Eastern Province, Sri Lanka. A total of 48 fish samples was analysed for cadmium (Cd), arsenic (As), lead (Pb), copper (Cu), iron (Fe), zinc (Zn) and mercury (Hg) using atomic absorption spectrophotometer (AAS) during the period of Aug.-Nov. 2013. The mean values of all trace metals in muscles of P. multiradiatus were within the international safety limits and pooled mean concentration of trace elements were in following order; Fe>Zn>Cu>Hg>Pb>Cd>As.

Food Additives & Contaminants: Part B, 2013

Mercury (Hg) and cadmium (Cd) are non-essential trace elements that transfer through the trophic ... more Mercury (Hg) and cadmium (Cd) are non-essential trace elements that transfer through the trophic chain which ultimately bio-accumulate and biomagnify in the upper trophic level. The total Hg (THg) and Cd levels of the muscle tissues of swordfish, Xiphias gladius caught in three different areas in the Indian Ocean around Sri Lanka were determined. THg and Cd levels were <0.07-4.30 mg/kg and <0.006-0.180 mg/kg, (wet weight basis) respectively. Of the analyzed samples, 13.3% fish were over 1 mg/kg for THg while not any single sample exceeded 0.30 mg/kg for Cd which is EU, and FDA action limits. The results indicate that the catching locations do not govern the THg and Cd levels and it showed a weak positive relationship between the length and weight of the fish.

Ceylon Journal of Science (Biological Sciences), 2014

Chronic Kidney Disease (CKD) has recently shown a remarkable increase in some areas in the North ... more Chronic Kidney Disease (CKD) has recently shown a remarkable increase in some areas in the North Central Province (Anuradhapura and Polonnaruwa districts), Sri Lanka. The consumption of fresh water fish contaminated with trace metals is considered as a possible causal factor for this. The concentration of mercury (Hg), lead (Pb), cadmium (Cd), chromium (Cr), copper (Cu), cobalt (Co), zinc (Zn), iron (Fe) and arsenic (As) in the muscle tissues of the five commonly consumed freshwater fish species, Oreochromis spp., Heteropneustes fossilis, Glossogobius giuris, Channa striata and Macrognathus aral were determined using Atomic Absorption Spectrophotometry (AAS). This study indicates that toxic metals' Hg, Cd and Pb were detected in very low concentration in muscle tissues and the recorded values were lower than the maximum permissible level (Hg< 0.5 mg/kg, Pb< 0.2 mg/kg and Cd< 0.05 mg/kg) established in Sri Lanka. The amount of fish that would fulfil the weekly protein requirement of an average child and adult was calculated according to the WHO guidelines. The calculated levels of contamination by Hg, Pb, Cd, As, Cu, Zn, Cr and Fe in the quantity of fish needed to fulfil the protein requirement was lower than the Provisional Tolerable Weekly Intake (PTWI) value established by WHO, EU and FAO and none of above guidelines not covered the level of Co.

Total mercury (T-Hg) concentration was measured in the hair of people who live and work in the Ne... more Total mercury (T-Hg) concentration was measured in the hair of people who live and work in the Negombo coastal area and Welimada mid country area of Sri Lanka. Hair samples were analysed for T-Hg by CVAAS (cold vapour atomic absorption spectrometry) in males (n= 52, 30 from Negombo and 22 from Welimada). Mean T-Hg level and ranged between 4.38±3.55
(>LOD-13.38) Negombo and 0.39±0.44 (>LOD-1.58) Welimada. The highest value was found in a 25 year businessman in Welimada (1.58 mg/kg), and the 28 years businessman from Negombo (13.38 mg/kg). All individuals from the Negombo area are consuming small fish to large fish ratio 1:1, and the common species are Trenched Sardines (Hurulla) and large fish like skipjack tuna (Balaya) yellowfin tuna (Kelawalla) and Treavallies (Paraw). But in some individuals in Welimada area are consuming small fish and the mean T-Hg was 0.29 mg/kg, while others have 0.67 mg/kg mean value. The 55.8% of the study population (13.6% Welimada& 86.7% Negombo) exceeded the USEPA recommendation 1 mg/kg. These values should be taken into account for future advisories and involvement approaches, which should consider Hg levels from all sources in order to maximize the nutritional input from fish and minimize the toxic risk.

The presence of copper (Cu), iron (Fe), zinc (Zn), lead (Pb), cadmium (Cd), cobalt (Co), chromium... more The presence of copper (Cu), iron (Fe), zinc (Zn), lead (Pb), cadmium (Cd), cobalt (Co), chromium (Cr)
and mercury (Hg) has been studied in ten sea cucumber (Holothurians) species in the Northwestern sea of Kalpitiya
and Dutch Bay area (Sri Lanka) during October- November 2008 and 2009. The concentration of in holothurians
body wall have been found to range from 1.84-9.18 mg/kg (Cu), 5.03-56.68 mg/kg (Fe), 3.68-24.38 mg/kg (Zn),
<0.04-4.70 mg/kg (Cr), 0.04-2.29 mg/kg (Pb), 41.62-128.93 μg/kg (Cd), 0.07-0.25mg/kg (Co) and 24.63-445.69
μg/kg (Hg) in dry weight basis. The results show that, according to European legislation, the body wall of
holothurians is generally “safe”, although the high levels of iron in all holothurians are noticeable.

Trace Metal Contaminants in Tissues of the Orinoco Sailfin Catfish Pterygoplichthy smultiradiatus, (Hancock, 1828); Sri Lanka

Concentration of Trace Metals in the Squids (Loligoduvauceli, Sepioteuthislessoniana) and Cuttlefish (Sepia latimanus) from the North-Western Coast of Sri Lanka

Mercury Content in Yellowfin Tuna (Thunnus albacares) and Swordfish (Xiphias gladius) and Estimation of Mercury Intake

Mercury (Hg) is a pollutant of global importance that adversely impacts ecological and human heal... more Mercury (Hg) is a pollutant of global importance that adversely impacts ecological and human health. A total of 140 Thunnus albacores (yellowfin tuna) and 176 of Xiphias gladius (swordfish) samples collected from the Indian Ocean around Sri Lanka in the period of July 2009 to March 2010 were examined for total mercury content and used to evaluate the mercury intake of Sri Lankan population. Total mercury concentrations of muscular tissues of fish were determined using cold vapor atomic absorption spectrometry. The results indicated that the highest mercury concentration were noted in swordfish 0.90±0.52 mg/kg, wet weight and followed by yellowfin tuna (0.30±0.18 mg/kg, wet weight). The projected intake values of mercury through human consumption were calculated (µg kg -1 body wt. weekly -1 ) and were compared with those of provisional tolerable weekly intake (PTWI) per kg body weight as stipulated by the Food and Agriculture Organization/World Health Organization (FAO/WHO) and Joint Expert Committee on Food Additives (JECFA).The estimated PTWI were lower than for yellowfin tuna and swordfish stipulated guidelines and therefore, was not considered to pose adverse effects to the humans with the present fish consumption volume.

Sri Lanka Journal of Aquatic Sciences, 2018

American Journal of Public Health Research, 2014

Nature and Science of Sleep

Food Additives & Contaminants: Part B, 2013

Ceylon Journal of Science (Biological Sciences), 2014

Total mercury (T-Hg) concentration was measured in the hair of people who live and work in the Ne... more Total mercury (T-Hg) concentration was measured in the hair of people who live and work in the Negombo coastal area and Welimada mid country area of Sri Lanka. Hair samples were analysed for T-Hg by CVAAS (cold vapour atomic absorption spectrometry) in males (n= 52, 30 from Negombo and 22 from Welimada). Mean T-Hg level and ranged between 4.38±3.55
(>LOD-13.38) Negombo and 0.39±0.44 (>LOD-1.58) Welimada. The highest value was found in a 25 year businessman in Welimada (1.58 mg/kg), and the 28 years businessman from Negombo (13.38 mg/kg). All individuals from the Negombo area are consuming small fish to large fish ratio 1:1, and the common species are Trenched Sardines (Hurulla) and large fish like skipjack tuna (Balaya) yellowfin tuna (Kelawalla) and Treavallies (Paraw). But in some individuals in Welimada area are consuming small fish and the mean T-Hg was 0.29 mg/kg, while others have 0.67 mg/kg mean value. The 55.8% of the study population (13.6% Welimada& 86.7% Negombo) exceeded the USEPA recommendation 1 mg/kg. These values should be taken into account for future advisories and involvement approaches, which should consider Hg levels from all sources in order to maximize the nutritional input from fish and minimize the toxic risk.

The presence of copper (Cu), iron (Fe), zinc (Zn), lead (Pb), cadmium (Cd), cobalt (Co), chromium... more The presence of copper (Cu), iron (Fe), zinc (Zn), lead (Pb), cadmium (Cd), cobalt (Co), chromium (Cr)
and mercury (Hg) has been studied in ten sea cucumber (Holothurians) species in the Northwestern sea of Kalpitiya
and Dutch Bay area (Sri Lanka) during October- November 2008 and 2009. The concentration of in holothurians
body wall have been found to range from 1.84-9.18 mg/kg (Cu), 5.03-56.68 mg/kg (Fe), 3.68-24.38 mg/kg (Zn),
<0.04-4.70 mg/kg (Cr), 0.04-2.29 mg/kg (Pb), 41.62-128.93 μg/kg (Cd), 0.07-0.25mg/kg (Co) and 24.63-445.69
μg/kg (Hg) in dry weight basis. The results show that, according to European legislation, the body wall of
holothurians is generally “safe”, although the high levels of iron in all holothurians are noticeable.

Trace Metal Contaminants in Tissues of the Orinoco Sailfin Catfish Pterygoplichthy smultiradiatus, (Hancock, 1828); Sri Lanka

Concentration of Trace Metals in the Squids (Loligoduvauceli, Sepioteuthislessoniana) and Cuttlefish (Sepia latimanus) from the North-Western Coast of Sri Lanka

Mercury Content in Yellowfin Tuna (Thunnus albacares) and Swordfish (Xiphias gladius) and Estimation of Mercury Intake

Mercury (Hg) is a pollutant of global importance that adversely impacts ecological and human heal... more Mercury (Hg) is a pollutant of global importance that adversely impacts ecological and human health. A total of 140 Thunnus albacores (yellowfin tuna) and 176 of Xiphias gladius (swordfish) samples collected from the Indian Ocean around Sri Lanka in the period of July 2009 to March 2010 were examined for total mercury content and used to evaluate the mercury intake of Sri Lankan population. Total mercury concentrations of muscular tissues of fish were determined using cold vapor atomic absorption spectrometry. The results indicated that the highest mercury concentration were noted in swordfish 0.90±0.52 mg/kg, wet weight and followed by yellowfin tuna (0.30±0.18 mg/kg, wet weight). The projected intake values of mercury through human consumption were calculated (µg kg -1 body wt. weekly -1 ) and were compared with those of provisional tolerable weekly intake (PTWI) per kg body weight as stipulated by the Food and Agriculture Organization/World Health Organization (FAO/WHO) and Joint Expert Committee on Food Additives (JECFA).The estimated PTWI were lower than for yellowfin tuna and swordfish stipulated guidelines and therefore, was not considered to pose adverse effects to the humans with the present fish consumption volume.