Metal forms in sediments from Arctic coastal environments in Kandalaksha Bay, White Sea, under separation processes

Koukina, Sofia; Vetrov, A. A.

doi:10.1016/j.ecss.2013.02.018

Cited by 15 publications

(11 citation statements)

References 19 publications

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“…This result supports the special affinity of Pb to Mn oxides in soils and sediments [9]. The high levels of acid-soluble Pb (28-32% of the total content) compared to previously studied estuarine and coastal sediments suggest a contamination problem in the Nha Trang Bay, which arises from the Cai River discharges, while the elevated level of easily reducible Pb fraction (7.5% of the total content) also contributes to the anthropogenic input of Pb [18,20]. The sources of the elevated contents of detrital Ag and labile Pb in the studied sediments need further study.…”

Section: Speciation Of Major and Trace Elements In Surface Sedimentssupporting

confidence: 80%

“…Thus, metalbased antifouling systems may play a major role in the trace heavy-metal contamination at the harbour [4]. The enhanced content of detrital heavy minerals may also result in anomalous natural metal concentrations [18]. Thus, the Zr concentration in the sediments is most likely heightened because of the enhanced content of Zr-rich minerals such as zircon [45].…”

Section: Abundance and Distribution Of Major And Trace Elements In Sumentioning

confidence: 99%

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Relationship between Bulk Metal Concentration and Bioavailability in Tropic Estuarine Sediments

Koukina¹,

Лобус²,

Peresypkin³

et al. 2016

Applied Studies of Coastal and Marine Environments

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elements, their chemical forms and the mineral composition, organic matter (TOC) and carbonates (TIC) in surface sediments from the Cai River estuary and Nha Trang Bay were first determined along the salinity gradient. The abundance and ratio of major and trace elements in surface sediments are discussed in relation to the mineralogy, grain size, depositional conditions, reference background and SQG values. Most trace-element contents are at natural levels and are derived from the composition of rocks and soils in the watershed. A severe enrichment of Ag is most likely derived from metal-rich detrital heavy minerals such as Ag-sulphosalts. Along the salinity gradient, several zones of metal enrichment occur in surface sediments because of the geochemical fractionation of the riverine material. The parts of actually and potentially bioavailable forms (isolated by four single chemical reagent extractions) are most elevated for Mn and Pb (up to 36% and 32% of the total content, respectively). The possible anthropogenic input of Pb in the region requires further study. Overall, the most bioavailable parts of trace elements are associated with easily soluble amorphous Fe and Mn oxyhydroxides. The sediments are primarily enriched with bioavailable metal forms in the riverine part of the estuary. Natural (such as turbidities) and human-generated (such as urban and industrial activities) pressures are shown to influence the abundance and speciation of potential contaminants and therefore change their bioavailability in this estuarine system.

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Section: Speciation Of Major and Trace Elements In Surface Sedimentssupporting

confidence: 80%

Section: Abundance and Distribution Of Major And Trace Elements In Sumentioning

confidence: 99%

Relationship between Bulk Metal Concentration and Bioavailability in Tropic Estuarine Sediments

Koukina¹,

Лобус²,

Peresypkin³

et al. 2016

Applied Studies of Coastal and Marine Environments

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“…This fraction can be released in the process of ion exchange and precipitation with the carbonates in the soil (Filgueiras et al 2004). Trace elements associated with this fraction have more labile bounds and can be easily released into the environment (Koukina and Vetrov 2013). The fraction is typically used to evaluate the mobility and bioavailability of trace elements.…”

Section: Trace Element Fraction In Soilsmentioning

confidence: 99%

Geochemical fractions and risk assessment of trace elements in soils around Jiaojia gold mine in Shandong Province, China

Cao

Kong

Yang

et al. 2015

Environ Sci Pollut Res

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Soils located adjacent to the Jiaojia gold mine were sampled and analyzed to determine the degree of which they were contaminated by trace elements (Hg, As, Cd, Pb, Cu, and Zn) in Shandong Province, China. All 18 samples exhibited mean Hg, As, Cd, and Pb concentrations in excess of local background values, while the mean concentrations of Cu and Zn were below the background values. In addition, the concentrations of trace elements in gold smelter (GS) soils were higher than in the gold mine (GM) soils. The result from a modified Tessier sequential extraction procedure was that with the exception of Cu in soils near the smelter, the trace elements were predominantly associated with the residual fraction. After residual fraction, most Hg was mainly humic acid and strong organic fraction, while most As was the humic acid. Cd was associated with the water soluble, ion exchange, and carbonate fractions compared with the other trace elements. Furthermore, Cu, Pb, and Zn were more concentrated in the humic acid and Fe/Mn oxide fraction. The fractions of trace elements were affected by soil pH and Ec (Electrical conductivity). The humic acid fraction of Hg as well as the ion exchange fraction of Cd and Zn displayed negative correlations with soil pH. The strong organic fraction of Hg, the Fe/Mn oxide fraction of Cd, and the carbonate fraction of Zn were positively related to the soil Ec. The strong organic fraction and ion exchange fraction of Zn were negatively related to soil Ec. However, the ion exchange and carbonate fractions of As showed significant positive correlations with soil pH. A calculated individual availability factor (A f (i) ) is used; the values of each trace element in the soils are in the following order: Cu > Cd > Pb > Zn > As > Hg. When combined with a risk assessment code, data suggest that Hg, As, Pb, and Zn levels showed low risk for the environment, whereas Cd levels in soils adjacent to the GM and Cu levels in soils adjacent to the GS showed medium risk to the environment, and Cd levels in soils adjacent to the GS exhibited higher environment risk.

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“…In surface sediments from the YRD, the mean concentrations of Cu, Ni, and Cr were lower than their corresponding average values in the upper continental crust of East China. Though the measured values were below threshold values based on quality guidelines (Long et al, 1995), an accumulation mechanism may lead to concentrations harmful to life even when anthropogenic inputs are low (Koukina and Vetrov, 2013).…”

Section: General Comparison Of Contamination Of Heavy Metalsmentioning

confidence: 65%

Assessment of Heavy Metal Contamination and Wetland Management in a Newly Created Coastal Natural Reserve, China

Xie

Zhang

Zhao

et al. 2016

Journal of Coastal Research

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Metal forms in sediments from Arctic coastal environments in Kandalaksha Bay, White Sea, under separation processes

Cited by 15 publications

References 19 publications

Relationship between Bulk Metal Concentration and Bioavailability in Tropic Estuarine Sediments

Relationship between Bulk Metal Concentration and Bioavailability in Tropic Estuarine Sediments

Geochemical fractions and risk assessment of trace elements in soils around Jiaojia gold mine in Shandong Province, China

Assessment of Heavy Metal Contamination and Wetland Management in a Newly Created Coastal Natural Reserve, China

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