Dissolved and particulate trace metals in the Cochin estuary

Ouseph, P. P.

doi:10.1016/0025-326x(92)90528-e

Cited by 38 publications

(19 citation statements)

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“…The low particulate metal concentrations recorded at offshore stations might be due to solubilisation, precipitation and subsequent incorporation in biological system. These statements are in agreement with that made by [19].…”

Section: Discussionsupporting

confidence: 94%

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Heavy Metal Contamination and Risk Assessment in the Marine Environment of Arabian Sea, along the Southwest Coast of India

S¹,

Muduli²,

Vardhan³

et al. 2012

CHEMISTRY

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Marine ecosystem is being threatened by the discharge of untreated sewage wastes and industrial effluents which ultimately affects the sustainability of living resources and public health. These wastes carry enormous level of toxicants especially the heavy metals have the tendency to accumulate into the basic food chain and move up through the higher trophic level and results in negative impact on the marine resources thus causing economic loss. In this regard, to ascertain the level of heavy metals in water, particulate, zooplankton (Zn, Mn, Pb, Cu, Cd and Hg) and in sediment (Pb, Al, Cd and Hg) along southern Kerala coast, India has been evaluated during early 2006. The heavy metal concentrations followed the hierarchy; Zn>Mn>Pb>Cu>Cd>Hg; Pb>Zn>Mn>Cu>Cd>Hg; Zn>Pb>Mn>Cu>Cd>Hg and Pb>Al>Cd>Hg in seawater, particulate matter, zooplankton and sediment respectively. The results revealed that in all the transacts (except Cochin) the heavy metal concentrations are below the threshold levels associated with the toxicological effects and the regulatory limits. Metal enrichments were observed close to the major urban areas of coastal waters, mostly associated with large scale industrialization. Enrichment factor, geoaccumulation index and pollution load index were calculated to evaluate the heavy metal threats along the coastal sediment. It revealed minor to moderately severe enrichment of Cd, Pb and Hg in the industrial zones of the coastal stretches especially at Cochin. A comparison with sediment quality guideline quotient indicated that there may be probability of ecotoxicological threats to the benthic community along Cochin transect.

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Section: Discussionsupporting

confidence: 94%

“…Significant contributions have been made with references to oceanic and coastal distribution of various heavy metals along the Indian coast [18,19]. However the study of the spatial distributions of dissolved, particulate heavy metals (e.g.…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal Contamination and Risk Assessment in the Marine Environment of Arabian Sea, along the Southwest Coast of India

S¹,

Muduli²,

Vardhan³

et al. 2012

CHEMISTRY

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“…However, if examined by separate segments, almost conservative behaviour for Pb was maintained up to the ~15 km for the summer period, whereas a negative decline from the dilution line is obvious for the first ~10 km in the winter period. Although of a very small absolute intensity, this decline could be attributed to the removal of Pb, often explained by rapid sorption of dissolved Pb onto re-suspended particles and/or co-precipitation with iron and manganese oxides (ElbazPoulichet et al, 1984;Fu et al, 2013;Ouseph, 1992;Waeles et al, 2007;Waeles et al, 2008b).…”

Section: Lead (Pb)mentioning

confidence: 99%

Evidencing the natural and anthropogenic processes controlling trace metals dynamic in a highly stratified estuary: The Krka River estuary (Adriatic, Croatia)

Cindrić

Garnier

Oursel

et al. 2015

Marine Pollution Bulletin

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Distributions of trace metals (TM), organic carbon, SPM and physico-chemical parameters were studied in the highly stratified Krka River estuary in winter/summer periods. The nonconservative behaviour of Zn, Cd, Pb and Cu in the brackish layer (plume), easily spotted due to very low inputs by the river, was mainly caused by their inputs from the pleasure boats, nautical marinas and harbour (e.g. release from antifouling paints). Contrarily, Ni and Co followed near-conservative behaviour. The extremely low SPM discharged by the river,

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“…Trace metal loads reach the aquatic system because the state lacks an efficient solid as well as liquid waste disposal system (Ouseph, 1992;Menon et al, 2000;Thomson, 2002). The booming city of Cochin, which is the largest on the west coast of India after Mumbai, is an important center for commerce, trade, and industry in southwest India.…”

Section: Introductionmentioning

confidence: 98%

Geochemical assessment of trace metal pollution in sediments of the Cochin backwaters

Rejomon

Martin

Nair

et al. 2016

Environmental Forensics

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The Cochin backwaters are facing widespread environmental pollution because of the release of solid wastes and liquid effluents from industrial, domestic, and agricultural sectors. The waters are contaminated with trace metals due to an inefficient waste disposal system. Here, the potential trace metal enrichment in sediments related to human activities was evaluated using an enrichment factor, contamination factor, geo-accumulation index, and pollution load index. Metal concentration ranges in sediments during the monsoon, post-monsoon, and pre-monsoon periods were as follows: Fe (15517-90885 mg/g), Mn (122.5-970.9 mg/g), Co (6.9-41.9 mg/g), Ni (12.9-62.9 mg/g), Cu (15.9-56.8 mg/g), Zn (58.7-888.7 mg/g), Cd (0.9-14.5 mg/g), and Pb (12.7-46.8 mg/g). Data on sediment trace metal concentrations are important for environmental forensic investigations, useful for monitoring (i.e., tracing) sources of contaminants (i.e., metal pollutants) and their impacts, and valuable for tracking the dispersal pathways of contaminants in estuarine environments.

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Dissolved and particulate trace metals in the Cochin estuary

Cited by 38 publications

References 4 publications

Heavy Metal Contamination and Risk Assessment in the Marine Environment of Arabian Sea, along the Southwest Coast of India

Heavy Metal Contamination and Risk Assessment in the Marine Environment of Arabian Sea, along the Southwest Coast of India

Evidencing the natural and anthropogenic processes controlling trace metals dynamic in a highly stratified estuary: The Krka River estuary (Adriatic, Croatia)

Geochemical assessment of trace metal pollution in sediments of the Cochin backwaters

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