Interpreting Selenium Concentrations

Lemly, A. Dennis

doi:10.1007/978-1-4613-0073-1_2

Cited by 7 publications

(3 citation statements)

References 53 publications

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“…She is commonly found as a naturally occurring element in rock, coal, and soil. At the same time, anthropogenic sources are coal ash from coal-fired power plants, irrigation waters from seleniferous soils and wastewater from some industrial processes [24]. Sb is a naturally occurring element, and the compound of Sb is commonly found in ores of silver, copper, and petroleum.…”

Section: Pb Geochronology Heavy Metalsmentioning

confidence: 99%

Historical trend of heavy metals in mangrove sediment from Nusa Lembongan, Bali using ²¹⁰Pb-geochronology

Lubis,

Sugiharto,

Putra

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Mangrove sediment is a natural filter for retaining pollutants before entering the coastal area and ocean. This study collected sediment cores from a Marine Protected Area (MPA) in Nusa Lembongan, Bali, to establish 210Pb geochronology and heavy metals records. Alpha spectrometry and Instrumental Neutron Activation Analysis (INAA) were used to determine 210Pb and heavy metals (Co, Cr, Fe, Hf, Sb, Sc, Se, and Zn), respectively. The Contamination Factor (CF), Enrichment Factor (EF), and Geo-accumulation Index (I_geo) were assessed. The result shows that 210Pb provided records of sediment accumulation spanning approximately 100 years. The vertical profiles of all heavy metals from the 1910s to the 1930s were slightly constant. From the 1930s to the 1990s, the profiles of Co, Cr, Hf, Sb, Sc, and Zn slightly increased; meanwhile, Fe and Se were slightly constant. From the 1990s to 2017, all heavy metals decreased gradually. Based on the CF, heavy metals Cr, Hf, Sb, Sc, and Zn were categorized as moderate contamination, and Co, Fe, and Se were low contamination. The average EFs of all heavy metals suggested their origin was derived from crustal material. In the I_geo index, only Sb was classified as moderate pollution, while the other heavy metals were not pollutants.

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Section: Pb Geochronology Heavy Metalsmentioning

confidence: 99%

Historical trend of heavy metals in mangrove sediment from Nusa Lembongan, Bali using ²¹⁰Pb-geochronology

Lubis,

Sugiharto,

Putra

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…Selenium concentrations in creek sediments, bank soils, coal ash, and biofilms were close to or exceeded the toxic effect threshold concentration for freshwater sediments (2 mg kgdw −1 ). The toxic effect threshold is a guideline "for assessing the degree of contamination and relative toxic threat to aquatic life" (Lemly 2002;May et al 2008). Selenium concentrations in creek sediments showed no distinct pattern along MB and had an average value of 7.1 mg kgdw −1 .…”

Section: Sediments Bank Soils Coal Ash and Biofilmsmentioning

confidence: 99%

Rogers Quarry Special Studies Report 2023

Brooks,

Mathews,

Jett

et al. 2023

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“…Unfortunately, the sources of the high pollution status of Se in single and multi-element pollution indices (CF, EF, and RI) are not yet known, and there is no previous literature on the analysis of this PTE in Lagos Lagoon. Moreover, the mobilization of Se in aquatic systems could be a result of anthropogenic activities, such as petroleum transport/oil refining, metal smelting, municipal landfills, and paint production amongst others (e.g., [45][46][47]), which are prevalent around the lagoon. Other studies have also shown that bioaccumulation along food chains can be another factor responsible for Se mobilization and cycling in aquatic ecosystems [48].…”

Section: Potentially Toxic Elements In Sedimentsmentioning

confidence: 99%

Contamination Levels of Potentially Toxic Elements and Foraminiferal Distribution Patterns in Lagos Lagoon: A Correlation Analysis

Fajemila

Martínez-Colón

Sariaslan

et al. 2021

Water

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The ecological response of benthic foraminifera to bioavailable Potentially Toxic Elements (PTEs) was evaluated in Lagos Lagoon (Nigeria). We sampled and analyzed PTEs across Lagos Lagoon with the aim to investigate the extent of contaminated sediments, to document their distribution, and to explore the relationship between PTE concentration and the spatial distribution, composition, abundance, and species richness of benthic foraminifera biotas. PTE’s recordings showed a wide range reflecting a diffuse contamination, where Contamination and Enrichment Factor suggest low to extremely polluted sediments. Findings of a previous survey of the benthic foraminifera inhabiting Lagos Lagoon revealed diverse assemblages of benthic taxa, species-specific distribution patterns, gradients of species richness and abundance, and a disjunct distribution of agglutinated and hyaline-perforate/porcelaneous taxa along a pronounced salinity gradient. Correlation matrix analysis shows that except for Selenium, all PTE total concentrations positively correlate with mud and Total Organic Carbon (TOC) and two of the most abundant agglutinated taxa, Ammotium salsum, and Trochammina sp. 1. Moreover, both species display significant positive correlations with CrF4-CoF2-F3-F4-total-CuF4-total-NiF3-F4-total-AlF4-total-FeF3-F4-total-ZnF3-F4-total. On the other hand, both foraminifers correlate negatively with PbF4-SeF3-Setotal. The overall significant positive correlation of these PTEs suggests that they behave as micronutrients when complexed with organic matter. No significant positive correlation with none of the PTEs in any fraction was found for neither species richness nor for the most abundant hyaline perforate species (Ammonia aoteana). Some PTE fractions were found to correlate either positively or negatively with individual species, suggesting that they function as either micronutrients and/or stressors. The resulting Contamination Factor of the PTE total concentrations shows that only a few sample sites can be classified as “moderately” polluted for chromium, zinc, and copper and that all sampled sites are classified as “highly polluted” for selenium. The highest concentrations for Cr, Cu, Ni, and Zn were found towards the industrialized western part, an area that is characterized by moderate to high diversity but low abundances.

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Interpreting Selenium Concentrations

Cited by 7 publications

References 53 publications

Historical trend of heavy metals in mangrove sediment from Nusa Lembongan, Bali using ²¹⁰Pb-geochronology

Historical trend of heavy metals in mangrove sediment from Nusa Lembongan, Bali using ²¹⁰Pb-geochronology

Rogers Quarry Special Studies Report 2023

Contamination Levels of Potentially Toxic Elements and Foraminiferal Distribution Patterns in Lagos Lagoon: A Correlation Analysis

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Interpreting Selenium Concentrations

Cited by 7 publications

References 53 publications

Historical trend of heavy metals in mangrove sediment from Nusa Lembongan, Bali using 210Pb-geochronology

Historical trend of heavy metals in mangrove sediment from Nusa Lembongan, Bali using 210Pb-geochronology

Rogers Quarry Special Studies Report 2023

Contamination Levels of Potentially Toxic Elements and Foraminiferal Distribution Patterns in Lagos Lagoon: A Correlation Analysis

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Historical trend of heavy metals in mangrove sediment from Nusa Lembongan, Bali using ²¹⁰Pb-geochronology

Historical trend of heavy metals in mangrove sediment from Nusa Lembongan, Bali using ²¹⁰Pb-geochronology