Trace element concentrations in reef associated sediments of Koswari Island, Gulf of Mannar biosphere reserve, southeast coast of India

Krishnakumar, S.; Ramasamy, S.; Chandrasekar, N.; Peter, T. Simon; Gopal, V.; Godson, Prince S.; Magesh, N.S.

doi:10.1016/j.marpolbul.2017.02.016

Cited by 21 publications

(9 citation statements)

References 38 publications

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“…It was proved that the alkali and alkaline earth metals in coal have a certain affect in the reactivity of lignite char [11,12]. Ca and Mg usually exist in carbonates form and show predominantly organic affinity [7,13]. To investigate the catalytic activity of minerals in lignite, DM and AW are need before catalyst preparation.…”

Section: Introductionmentioning

confidence: 99%

Preparation of high-dispersion Ni/C catalyst using modified lignite as carbon precursor for catalytic reforming of biomass volatiles

Ren

Cao

Zhao

et al. 2017

Fuel

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Section: Introductionmentioning

confidence: 99%

Preparation of high-dispersion Ni/C catalyst using modified lignite as carbon precursor for catalytic reforming of biomass volatiles

Ren

Cao

Zhao

et al. 2017

Fuel

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“…Multivariate analysis is commonly used to distinguish factors such the natural and anthropogenic contributions of the elements according to the various levels of relationship [17,18,[50][51][52]. In this study, PCA was employed to ascertain possible relationships of the variables and their input sources among the pollutants.…”

Section: Principal Component Analysismentioning

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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“…Its calculation is used to evaluate the degree of anthropogenic pollution by trace elements [43]. Since then, this concept has been used by several authors [10,26,42,[44][45][46][47][48], whether on soil or sediment to determine the anthropogenic contribution in terms of trace element pollution. However, concerns exist regarding the choice of the reference element (normalizer) and the choice of the reference material (uncontaminated) because, according to References [49,50], these two choices determine the reliability and representativeness of the enrichment calculated in the regional context.…”

Section: Enrichment Factormentioning

confidence: 99%

“…Whatever their origins, trace elements, in addition to major and rare earth elements, are transported by runoff in dissolved or particulate forms and finish their transfer pathway by deposition on the bottom sediments in aquatic ecosystems [5,6]. The sediments then serve as a sink for potentially toxic elements [7,8] and store them through complex processes of physical and chemical adsorption [9,10]. Under these conditions, they can limit bioavailability or allow the remobilization and re-suspension of trace elements in the water column [4,10,11].…”

Section: Introductionmentioning

confidence: 99%

“…The sediments then serve as a sink for potentially toxic elements [7,8] and store them through complex processes of physical and chemical adsorption [9,10]. Under these conditions, they can limit bioavailability or allow the remobilization and re-suspension of trace elements in the water column [4,10,11]. Once released into the water column, they represent a threat to aquatic ecosystems and a health risk to millions of people due to their toxicity as well as persistence and ability to accumulate in living organisms [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Geochemical Composition of the Lomé Lagoon Sediments, Togo: Seasonal and Spatial Variations of Major, Trace and Rare Earth Element Concentrations

Badassan

Avumadi

Ouro-Sama

et al. 2020

Water

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The concentrations of major, trace (TE), and rare earth (REE) elements and their seasonal and spatial distribution were studied on the fine fraction (<63 µm) of the sediments of the Lomé lagoons (West Lake, East Lake, and Lake Bè). The sediments were collected on a total of nine sampling sites (three per Lake) during two campaigns (dry season and rainy season). The quality of the sediments was assessed on the basis of the enrichment factor (EF) and the labile or non-residual fraction (NRF) in relation to the values recommended for the quality of the sediments (Sediment Quality Guidelines, SQG). The distribution of rare earth elements shows enrichments in light rare earths superior to those of heavy rare earth elements during any season. Positive Ce anomalies are less noticeable and less variable between seasons than Eu anomalies. La/Yb ratios are positively correlated with the percentage of Al and Fe oxides and with the percentage of fine fractions. The main bearing phases of rare earth elements are, therefore, Al and Fe oxides and the finest fractions of the sediments. The concentrations of trace elements vary little, according to the seasons, but show strong variations from one element to another. The degrees of enrichment obtained are moderate for Bi, Cr, Ga, Mo, Pb, Sn, and Zn (1.5 < EF < 5) to significant for As, Cd, and Sb (5 < EF < 20) for all sites of Lake Bè. For the sites of West Lake, the degrees of enrichment obtained are moderate for As, Cd, Cu, Mo, and Pb (1.5 < EF < 5) to a significance for As, Bi, Cd, Pb, Sb, Sn, and Zn (5 < EF < 20). Only the East Lake sites show high degrees of enrichment for elements such as Sb and Sn (20 < EF < 40). Trace elements (TE) such as As, Cd, Cu, and Ni have total concentrations within the range of variation of the SQG concentrations (particularly Probable Effect Level (PEL) and Effect Range Median (ERM)), whereas Cr, Pb, and Zn total concentrations are higher. The ranking of priority sites with respect to the sediment contamination is determined according to ERM and PEL quotients in relation to the probability of toxicity for benthic organisms. For almost all the sites, the priority is lowest to medium-low with regard to As, Cd, and Cu and medium-high (Cr and Ni) to highest (Pb and Zn), particularly for the East and West Lakes. Moreover, the NRF can represent significant percentages of the total TE concentrations: 5% to 15% for As, Bi, Ni, V, Mo, and Sc, 15% to 25% for Co, Cu, and Sr, 25% to 40% for Pb and Zn and, lastly, 47% to 55% for Cd.

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Trace element concentrations in reef associated sediments of Koswari Island, Gulf of Mannar biosphere reserve, southeast coast of India

Cited by 21 publications

References 38 publications

Preparation of high-dispersion Ni/C catalyst using modified lignite as carbon precursor for catalytic reforming of biomass volatiles

Preparation of high-dispersion Ni/C catalyst using modified lignite as carbon precursor for catalytic reforming of biomass volatiles

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

Geochemical Composition of the Lomé Lagoon Sediments, Togo: Seasonal and Spatial Variations of Major, Trace and Rare Earth Element Concentrations

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