Seasonal assessment of trace element contamination in intertidal sediments of the meso-macrotidal Hooghly (Ganges) River Estuary with a note on mercury speciation

Priyanka Mondal, Rosivaldo de Alcântara Mendes, M. P. Jonathan, Jayanta Kumar Biswas, Kadarkarai Murugan, Santosh Kumar Sarkar

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Abstract

© 2017 Elsevier Ltd The spatial and seasonal distribution of trace elements (TEs) (n = 16) in surficial sediment were examined along the Hooghly River Estuary (~ 175 km), India. A synchronous elevation of majority of TEs concentration (mg kg− 1) was encountered during monsoon with the following descending order: Al (67070); Fe (31300); Cd (5.73); Cr (71.17); Cu (29.09); Mn (658.74); Ni (35.89). An overall low and homogeneous concentration of total Hg (THg = 17.85 ± 4.98 ng g− 1) was recorded in which methyl mercury (MeHg) shared minor fraction (8–31%) of the THg. Sediment pollution indices, viz. geo-accumulation index (Igeo) and enrichment factor (EF) for Cd (Igeo = 1.92–3.67; EF = 13.83–31.17) and Ba (Igeo = 0.79–5.03; EF = 5.79–108.94) suggested high contamination from anthropogenic sources. From factor analysis it was inferred that TEs primarily originated from lithogenic sources. This study would provide the latest benchmark of TE pollution along with the first record of MeHg in this fluvial system which recommends reliable monitoring to safeguard geochemical health of this stressed environment.
Original languageAmerican English
Pages (from-to)117-130
Number of pages103
JournalMarine Pollution Bulletin
DOIs
StatePublished - 1 Feb 2018

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Ganges River
Estuaries
Trace elements
mercury
trace elements
Sediments
Contamination
estuaries
Rivers
estuary
trace element
sediments
river
sediment
Pollution
Surficial sediments
sediment pollution
sediment contamination
methylmercury compounds
surficial sediment

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Mondal, Priyanka ; de Alcântara Mendes, Rosivaldo ; Jonathan, M. P. ; Biswas, Jayanta Kumar ; Murugan, Kadarkarai ; Sarkar, Santosh Kumar. / Seasonal assessment of trace element contamination in intertidal sediments of the meso-macrotidal Hooghly (Ganges) River Estuary with a note on mercury speciation. In: Marine Pollution Bulletin. 2018 ; pp. 117-130.
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Seasonal assessment of trace element contamination in intertidal sediments of the meso-macrotidal Hooghly (Ganges) River Estuary with a note on mercury speciation. / Mondal, Priyanka; de Alcântara Mendes, Rosivaldo; Jonathan, M. P.; Biswas, Jayanta Kumar; Murugan, Kadarkarai; Sarkar, Santosh Kumar.

In: Marine Pollution Bulletin, 01.02.2018, p. 117-130.

Research output: Contribution to journalArticle

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