Source, distribution and ecotoxicological assessment of multielements in superficial sediments of a tropical turbid estuarine environment: A multivariate approach
Carbon
; Chemical elements
; Ecology
; Estuaries
; Geochemistry
; Organic carbon
; Rivers
; Surficial sediments
; Trace elements
; Wetlands
; Ecological risks
; Ecotoxicological assessment
; Element concentrations
; Estuarine environments
; Geo-accumulation index
; Geochemical indices
; Sediment quality guideline (SQGs)
; Surface sediments
; Sediments
; arsenic
; cadmium
; chromium
; copper
; mercury
; nickel
; organic carbon
; trace element
; zinc
; heavy metal
; water pollutant
; assessment method
; ecotoxicology
; environmental risk
; estuarine environment
; geochemistry
; mangrove
; marine sediment
; sediment pollution
; trace element
; wetland
; Article
; concentration (parameters)
; ecotoxicology
; estuary
; geochemistry
; mangrove
; pollution monitoring
; river
; sediment
; turbidity
; water pollutant
; wetland
; analysis
; chemistry
; ecotoxicology
; environmental monitoring
; pilot study
; sediment
; Hooghly Estuary
; India
; Sundarbans
; West Bengal
; Ecotoxicology
; Environmental Monitoring
; Geologic Sediments
; Metals, Heavy
; Pilot Projects
; Water Pollutants, Chemical
Scopus学科分类:
Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要:
The work examined the distribution, possible sources and ecotoxicological assessment of 51 trace elements covering 13 sampling stations in surface sediments of coastal regions of Sundarban mangrove wetland and adjacent Hugli river estuary. The element concentrations exhibited an increasing trend towards downstream of the estuary (except lanthanides) with maximum enrichment for 22 elements at Gangadharpur (Sundarban region). According to Sediment Quality Guidelines (SQGs), the concentrations of Cu, As, Cr and Cd exceeded the Effects-Range-Low values, while Ni at certain stations exceeded the Effects-Range-Medium suggesting adverse effects on the sediment-dwelling organisms. The geoaccumulation index revealed that the stations were unpolluted to moderately polluted. Risk Index (357.61) and Enrichment factor (11.42) depicted that Nimtala station (upstream) was at high ecological risk zone. The result of PCA endorsed that organic carbon and clay fraction play crucial role in accumulating the elements in sediments. This pilot study contributes to a better understanding of the geochemistry of this complex deltaic ecosystem. � 2016 Elsevier Ltd
Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Nottingham, United Kingdom; Department of Marine Science, University of Calcutta, 35, Ballygunge Circular Road, Calcutta, India
Recommended Citation:
Watts M.J.,Mitra S.,Marriott A.L.,et al. Source, distribution and ecotoxicological assessment of multielements in superficial sediments of a tropical turbid estuarine environment: A multivariate approach[J]. Marine Pollution Bulletin,2017-01-01,115(2018-01-02)