An assessment of mercury loading in core sediments of Sunderban mangrove wetland, India (a preliminary report)

Author(s): Kwokal Z, Sarkar SK, Chatterjee M, Franciskovis-Bilinski S, Bilinski H, et al.


This is a preliminary report on total mercury (T(Hg)) in core sediments (<63 microm particle size) of Sunderban mangrove wetland, northeastern part of the Bay of Bengal, India. Cold vapor atomic absorption spectrometry (CVAAS) was used for T(Hg) determination. The concentration varies from 9.8 to 535.1 ppb (ngg(-1)). Results revealed variations over premonsoon and postmonsoon month at different core depth, as well as in studied three sampling stations, located at the site of three rivers: Hugli River (S(1)), Matla River (S(2)) and Bidyadhari River (S(3)). Elevated concentration of T(Hg) in subsurface layer (4-8 cm) of the core at S(2) is attributed to remobilization of mercury from deeper sediment (32-36 cm). Positive correlation is present between total Hg and clay content. Based on index of geoaccumulation (I(geo)) and Effects-Range Low (ER-L) value (150 ppb) it is considered that the sediments are till now unpolluted. As a consequence, there is less chance of ecotoxicological risk to organisms living in studied sediments. Two statistical methods were applied to determine T(Hg) anomalies. Box plot method showed one extreme and three outliers in S(1) at postmonsoon season. Two extremes were found at S(2) at 4-8 and at 32-36 cm in premonsoon period. In S(3) there was no anomaly by box plot method. MAD method was more sensitive than box plot method and T(Hg) anomaly was detected at 12-16 cm in S(3) during postmonsoon season. The data reported are useful baselines for T(Hg) in Sunderban mangrove wetland, India and would be of help in future sediment quality studies.

Similar Articles

Benefits and risks of fish consumption Part I

Author(s): Domingo JL, Bocio A, Falcó G, Llobet JM

A prospective study of intake of fish and marine fatty acids and prostate cancer

Author(s): Augustsson K, Michaud DS, Rimm EB, Leitzmann MF, Stampfer MJ, et al.

Long-term fatty fish consumption and renal cell carcinoma incidence in women

Author(s): Wolk A, Larsson SC, Johansson JE, Ekman P

Risks and benefits of consumption of Great Lakes fish

Author(s): Turyk ME, Bhavsar SP, Bowerman W, Boysen E, Clark M, et al.

Health risk of consuming heavy metals in farmed tilapia in central Taiwan

Author(s): Ling MP, Hsu HT, Shie RH, Wu CC, Hong YS

Heavy metals concentration in edible fishes from coastal region of Kalpakkam, southeastern part of India

Author(s): Biswas S, Prabhu RK, Hussain KJ, Selvanayagam M, Satpathy KK

Metals in fish along the southeast coast of India

Author(s): Thiyagarajan D, Dhaneesh KV, Ajith Kumar TT, Kumaresan S, Balasubramanian T

Metals in two species of fish in Karasu River

Author(s): Sönmez AY, Yaganoglu AM, Arslan G, Hisar O

Metals in edible fish from Vistula River and Dead Vistula River channel, Baltic Sea

Author(s): Wyrzykowska B, Falandysz J, Jarzyńska G

A study on the phytoaccumulation of waste elements in wetland plants of a Ramsar site in India

Author(s): Chatterjee S, Chetia M, Singh L, Chattopadhyay B, Datta S, et al.

A study on the waste metal remediation using floriculture at East Calcutta Wetlands, a Ramsar site in India

Author(s): Chatterjee S, Singh L, Chattopadhyay B, Datta S, Mukhopadhyay SK

Trace metal distribution in tissues of cichlids (Oreochromis niloticus and O

Author(s): Chatterjee S, Chattopadhyay B, Mukhopadhyay SK

Seasonal variation of Zn, Cu and Pb in the estuarine stretch of West Bengal

Author(s): Chakraborty R, Zaman S, Mukhopadhyay N, Banerjee K, Mitra A

Nationwide reference data for height, weight and body mass index of Indian schoolchildren

Author(s): Marwaha RK, Tandon N, Ganie MA, Kanwar R, Shivaprasad C, et al.