Bioaccumulation of mercury in clams (Meretrix lyrata) cultured atthe Bach Dang estuary: a recommendation for safe daily dosage consumption of clams in Vietnam
Keywords:Mercury, methylmercury, Meretrix lyrata, Bioaccumulation factor (BAF), Accepted daily intake
AbstractThis study assessed the level of mercury (THg) and methylmercury (MeHg) in seawater and clams (Meretrix lyrata) during all four seasons (July 2010 to May 2011) at the Dong Bai intertidal area in the Bach Dang estuary. The results showed that total mercury and methyl mercuryconcentrations of the water were under the allowable limit. Total mercury and methylmercury concentration for clams ranged from 12.5-87.9 ng/g dw and 1.1-24.6 ng/g dw, respectively. The highest bioaccumulation factor (BAF) of Meretrix lyrata was 303.2 for mercury and 165,000 for methylmercury. The recommended safe dosage for daily clam consumption depends on the season. Over a one-year period, mercury contamination in clams harvested in the Bach Dang estuary ranged from 1.4 to 38.1 g/kg bw. It is not recommended to consume too many clams in March or April.
Arnot JA, Gobas FA (2006) A review of bioconcentration factor (BCF) and bioaccumulation factor (BAF) assessments for organic chemicals in aquatic organisms. Environmental Reviews14: 257-297.
Canadian Council of Ministers of Environment (2003) Canadian Water Quality Guidelines for the Protection of Aquatic life. Mercury: inorganic mercury and methylmercury. Canadian Council of Ministers of the Environment.
Chin T-S, Chen H-C (1993) Toxic effects of mercury on the hard clam, Meretrix lusoria, in various salinities. Comp Biochem Physiol C: Comp Pharmacol105: 501-507.
Deocadiz ES, Diaz VR, Otico P-FJ (1999) ASEAN water quality criteria for mecury. Methodology and Criteria for 18 Pamameters ASEAN Marine Water Quality Criteria. pp XIII-1, pp. XIII-41.
Eisler R (2006) Mercury Hazards to Living Organisms.CRC Press Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742.
EPA (1997) Fate and transport of mercury in the environment. Mercury study report to congress.Environmental Protection Agency, USA.
EPA (1998) Method 1630: Methyl mercury in water by Distillation, Aqueous Ethylation, Purge and Trap, and Cold vapor Atomic Flourescence Spectrometry. Environmental Protection Agency, USA.
EPA (2002) Method 1631, method 1630e: Mercury in water, sediment, tissue by Oxidation, Purge and Trap, and Cold vapor Atomic Flourescence Spectrometry. Environmental Protection Agency, USA.
Harada M (1995) Minamata disease: methylmercury poisoning in Japan caused by environmental pollution. Critic Rev Toxicol25: 1-24.
Ho HH, Swennen R, Cappuyns V, Vassilieva E, Van Gerven T, Tran TV (2012) Potential release of selected trace elements (As, Cd, Cu, Mn, Pb and Zn) from sediments in Cam River-mouth (Vietnam) under influence of pH and oxidation. Sci Total Environ435-436.
Hong Y-S, Kim Y-M, Lee K-E (2012) Methylmercury Exposure and Health Effects. J Prevent Med Pub Health45: 353-363.
JECFA (2004) Methylmercury. Summary and conclusion of the 61th Joint FAO/WHO Expert Committee on Food Additives. Geneva, World Health Organization, International Programme on Chemistry Safety. WHO Technical Report Series 922p: 132-139.
JECFA (2006) Methylmercury. Summary and conclusion of the 67th Joint FAO/WHO Expert Committee on Food Additives. Geneva, World Health Organization, International Programme on Chemistry Safety WHO Technical Report Series 940
Kehrig HA, Costa M, Moreira I, Malm O (2006) Total and methyl mercury in different species of molluscs from two estuaries in Rio de Janeiro State. J Brazil Chem Socie17: 1409-1418.
Kehrig HDA, Costa M, Moreira I, Malm O (2001) Methylmercury and total mercury in estuarine organisms from Rio de Janeiro, Brazil. Environ Sci Pollut Res8: 275-279.
Le Xuan Sinh (2012) Header of project’s title: To assess the accumulation of toxic pollutants in some special organisms at the tidal flat in the Northeast of Vietnam in order to propose preventable solutions for the toxic accumulation in human body. Project's code: VAST 06.07/11-12.
Le Xuan Sinh (2014) Assessing mercury accumulation mechanisms of Hard clam Meretrix lyrata (Sowerby, 1825) at Bach Dang estuary – Hai Phong city. In: Doctoral thesis of Hanoi University of Science and Technology. Hanoi University of Science and Technology, Hanoi.
Le Xuan Sinh, Duc TT, Kim CD (2011) Study on Growth’s Rule of Hard Clam (Meretrix lyrata) in Bach Dang Estuary, Viet Nam. Environ Nat Resour Res1: 139-151.
Liu C-W, Liang C-P, Lin K-H, Jang C-S, Wang S-W, Huang Y-K, Hsueh Y-M (2007) Bioaccumulation of arsenic compounds in aquacultural clams (Meretrix lusoria) and assessment of potential carcinogenic risks to human health by ingestion. Chemosphere69: 128-134.
Liu J, Cao L, Dou S (2017) Bioaccumulation of heavy metals and health risk assessment in three benthic bivalves along the coast of Laizhou Bay, China. Mari Pollut Bull117: 98-110.
Mania M, Wojciechowska-Mazurek M, Starska K, Rebeniak MJP (2012) Fish and seafood as a source of human exposure to methylmercury. Rocz Panstw Zakl Hig63: 257-264.
Navarro P, Amouroux D, T, hanh ND, Rochelle-Newall E, Ouillon S, Arfi R, Van TC, Mari X, Torréton J-P (2012) Fate and tidal transport of butyltin and mercury compounds in the waters of the tropical Bach Dang Estuary (Haiphong, Vietnam). Mari Pollut Bull64: 1789-1798.
Otchere FA, Joiris CR, Holsbeek L (2003) Mercury in the bivalves Anadara (Senilia) senilis, Perna perna and Crassostrea tulipa from Ghana. Sci Total Environ304: 369-375.
Phu TQ (1999) Study on some biological characteristics, biochemical and farming techniques Meretrix lyrata clam (Sowerby). University of Can Tho.
Sadiq M, McCain JC (1993) Effect of the 1991 Gulf war on metal bioaccumulation by the clam (Meretrix meretrix). Mari Pollut Bull27: 163-170.
Shimadzu (1997) Determination of elemental Mecury Using MVU-1A. Spectrophotometric analysis 208. C101-E043.
Thanh TD, An LD, Trang TM (2014) Estuarine areas in Hai Phong city – position resources. J Scienc Technol14: 110-121.
Tuan LQ (2008) Environment Toxicity (Chapter II, pp. 6-7).Faculty of Environment and Natural Resources, Ho Chi Minh Agriculture and Sylviculture University.
Tzong-Shean C, Hon-Cheng C (1993) Bioaccumulation and distribution of mercury in the hard clam, Meretrix lusoria (Bivalvia:Veneidae). Comp Biochem Physiol Part C: Pharmacol Toxicol Endocrin106: 131-139.
Wang Q, Wang X, Wang X, Yang H, Liu B (2010) Analysis of metallotionein expression and antioxidant enzyme activities in Meretrix meretrix larvae under sublethal cadmium exposure. Aqua Toxicol100: 321-328.
WHO (2005) Policy Paper: Mercury in Health Care. Geneva, World Health Organization (WHO/SDE/WSH/05.08).
Wu X, Jia Y, Zhu H (2012) Bioaccumulation of cadmium bound to ferric hydroxide and particulate organic matter by the bivalve M. meretrix. Environ Pollut165: 133-139.