Trace element concentration in surface sediments of Palk Strait, southeast coast of Tamil Nadu, India

Kasilingam, K.; Gandhi, M. Suresh; Krishnakumar, S.; Magesh, N.S.

doi:10.1016/j.marpolbul.2016.06.051

Cited by 53 publications

(9 citation statements)

References 23 publications

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“…Such input of metals represents a serious socio-environmental problem, since coastal regions constitute an important source of food and other resources for the populations that inhabit them (Araújo et al, 2017). Potentially dangerous trace elements are brought to the marine environment by the direct discharge of urban waste and industrial effluents and can be transported through the atmosphere from their source to coastal locations (Cardoso et al, 2001;Kasilingam et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…The geochemical backgrounds from marine sediments, provide an approach on the present environmental quality of the ecosystem, but also serve as a baseline for future investigations (Kasilingam et al, 2016). Due to the growing urbanization rate and fast and unplanned development, many tropical coastal areas in Brazil are being affected by accelerated processes of ecosystems degradation (Gomes et al, 2009;Araújo et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Background Concentrations of Chemical Elements in Sepetiba Bay (Se Brazil)

et al. 2019

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This study intends to evaluate baseline concentrations of chemical elements for unpolluted sediments of Sepetiba Bay (SE Brazil). It analyzes the concentrations of potentially toxic elements (PTE) and other chemical elements (by Inductively Coupled Plasma Mass Spectrometry and Inductively Coupled Plasma Emission Spectrometry) from the upper part of the SP2 drillcore (or 2-SPT-1-RJ; with 50.30 m length), collected on the margins of Sepetiba Bay (at latitude 22° 55'S and longitude 43° 46'W). This core was described and sampled. Textural, mineralogical and geochemical analyses were performed in 17 sediment levels. The sediment layers of interest were selected, considering the period in which they were deposited, before high anthropic influence in the area, and on sediment grain-size. Only the muddy levels were selected, since fine sediments generally tend to have higher elemental concentrations. Foraminiferal occurrence was also analyzed in the selected layers. The results indicate that the studied sediments were deposited in a transitional marine context, after being exposed to multiple sedimentary cycles and weathering. The baseline concentrations, related to natural sediment sources were estimated for As, Cd, Co, Cr, Cu, Ni, Pb, Zn) and P and for other chemical elements. These results are useful in environmental impact assessment not only in the study area, but also for other coastal regions of Rio de Janeiro State. TÍTULO: CONCENTRAÇÕES DE FUNDO DE ELEMENTOS QUÍMICOS NA BAÍA DE SEPETIBA (SE BRASIL) RESUMO:Este estudo pretende avaliar as concentrações de fundo de elementos químicos, em sedimentos não poluídos, na Baía de Sepetiba (Se Brasil). Analisa as concentrações de elementos potencialmente tóxicos (PTE) e outros elementos químicos (por Espectrometria de Massa Plasma Acoplada Indutivamente e Espectrometria de Emissão Plasma Acoplada Indutivamente) da parte superior do testemunho SP2 (ou 2-SPT-1 RJ; com 50,30 m de comprimento), coletado nas margens da Baía de Sepetiba (à latitude 22° 55'S e longitude 43° 46'W). Este testemunho foi descrito e amostrado a cada 5 cm. Análises estruturais, mineralógicas e geoquímicas foram realizadas em 17 níveis de sedimentos. Os níveis de interesse foram selecionados, considerando o período em que foram depositados, antes da alta influência antrópica na área, e no tamanho do grão do sedimento. Apenas os níveis de lama foram selecionados, uma vez que os sedimentos finos tendem geralmente a ter maiores concentrações de elementos quimicos. A ocorrência de foraminíferos foi também analisada nas camadas selecionadas. Os resultados indicam que os sedimentos estudados foram depositados num contexto marinho de transição, após serem expostos a múltiplos ciclos sedimentares e a intemperismo. As concentrações de fundo, relacionadas a fontes naturais de sedimento foram estimadas para As, Cd, Co, Cr, Cu, Ni, Pb, Zn) e P e para outros elementos químicos. Esses resultados são úteis para a avaliação de impacto ambiental, não apenas na área de estudo, mas também em outras regiões costeiras do Estado do Rio de Janeiro. PALAVRAS-CHAVE: Multi-indicadores. Sedimentos. Registros Holocénicos. Litoral. Atlântico Sul.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Background Concentrations of Chemical Elements in Sepetiba Bay (Se Brazil)

et al. 2019

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“…The highest value of Mn (896 mg kg −1 ) was detected at station 1 due to the presence of mangrove vegetation along the coast. Overall, the concentrations of Fe and Mn indicate that both these elements are predominantly regulated by the riverine input and existence of the mangrove vegetation [20]. The main source of Mn is anthropogenic inputs such as industrial effluents and emissions [57].…”

Section: Discussionmentioning

confidence: 99%

Heavy metal pollutants and their spatial distribution in surface sediments from Thondi coast, Palk Bay, South India

Perumal

Antony

Subagunasekar

2021

Preprint

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Background The concentration of heavy metals and their spatial distribution in surface sediments collected from the Thondi coast, Palk Bay, South India were analysed in this study. The sediment grain size, pH, EC, and heavy metal concentrations (Mn, Fe, Cr, Zn, Cd, Ni, Cu, and Pb) were determined and the values for the geoaccumulation index (Igeo), enrichment factor (EF), potential contamination index (Cp), potential ecological risk index (PERI), contamination factor (CF), modified contamination degree (mCd), degree of contamination (Cd), and potential contamination factors (Cp) were calculated based on their background values to determine the pollution level of the study area. The sediment grain size, pH, EC, and heavy metal concentrations were determined and the values for the pollution indices were calculated based on their background values to determine the pollution level. Results The pollution indices, namely EF, CF, Cd, mCd, CP, \({\text{E}}_{\text{r}}^{\text{i}}\), and PERI, except for Igeo, revealed that the heavy metal contamination was due to Cd, while a moderate level of contamination was caused by Cu, Zn, Pb, and Cr. The principal component analysis and correlation matrix analysis showed a strong positive loading for Cd due to its high level of contamination in the study area. Anthropogenic inputs such as municipal wastewater, domestic sewage discharge, fishing harbour activities, and industrial and aquaculture wastes led to the increased Cd concentration in the study area. Moreover, the pollution load index revealed that the sediments were polluted by heavy metals. Conclusion The findings of this study revealed that the increased concentration of heavy metals in the study area increases the toxicity in the marine environment, thus affecting the ecosystem.

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“…The consequent dendrogram of Q-mode hierarchical cluster analysis provides the grouping of samples according to the heavy metal, organic matter, grain size and depth. The dendrogram exhibits four groups, cluster 1 (12,24,20,10,13,18,19,9,11,5, 22 and 7) cluster 2 (16,25,6,21,26,27,17,8) cluster 3(14, 29, 23 and 15) cluster 4 (4, 28, 1, 2 and 3) (Fig. 7).…”

Section: Q Mode Clustermentioning

confidence: 99%

Assessment of Heavy Metal Pollution Indices in Surface Sediments From Southwestern Bay of Bengal, India

Sadanandan¹,

Dharmalingam²,

Agarwal³

et al. 2021

Preprint

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The study of heavy metal distribution in the shelf sediments of Southwestern part of Bay of Bengal is essential in determining the distribution pattern and to understand the consequences of marine pollution beside the coastal environment. The south eastern coastal areas of India are affected by several disturbances and contamination associated with accelerated industrialization and urbanization. Twenty-nine surface sediment samples were collected from shelf region of Southwestern part of Bay of Bengal and analyzed for sediment texture, organic matter and heavy metals. Pollution indices such as Enrichment Factor (EF), Geoaccumulation Index (Igeo), Contamination Factor (CF) as well as multivariate statistical analyses were used to recognize the pollution pattern and probable sources for metal contamination. Comparatively, the concentration of heavy metals in the study area is closely associated with finer fractions and organic matter. The results demonstrate that Cu, Co, Mn, Pb, Zn, Cr and Ni in most of the sites are extremely contaminated in terms of Igeo. The computed values of CF indicate very high contamination of the metals like Pb, Zn and Cr followed by uncontamination to moderate contamination of Cu, Mn, Ni, Co. Based on factor analysis, domestic and industrial activities from adjacent land areas are found to be the major contributors of heavy metals in the shelf sediments.

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Trace element concentration in surface sediments of Palk Strait, southeast coast of Tamil Nadu, India

Cited by 53 publications

References 23 publications

Background Concentrations of Chemical Elements in Sepetiba Bay (Se Brazil)

Background Concentrations of Chemical Elements in Sepetiba Bay (Se Brazil)

Heavy metal pollutants and their spatial distribution in surface sediments from Thondi coast, Palk Bay, South India

Assessment of Heavy Metal Pollution Indices in Surface Sediments From Southwestern Bay of Bengal, India

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