Trace metals in humic acids from recent Skagerrak sediments

Fengler, G.; Kersten, Michael; Liebezeit, Gerd

doi:10.1016/0025-326x(94)90389-1

Cited by 11 publications

(14 citation statements)

References 11 publications

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“…While research into these substances has a historic origin in soil science (Kononova, 1966), the presence of HA and FA in sedimentary OM (SOM) has been reported more recently (Huc and Durand, 1977;Verheyen and Johns, 1981;Ibarra and Juan, 1985;Verheyen et al, 1985;Fengler et al, 1994). Although HA and FA in SOM tend to condense to humin during SOM diagenesis (Huc and Durand, 1977;Verheyen and Johns, 1981), oxidative weathering regenerates HA and FA in both surface (Berkowitz, 1979;Estévez et al, 1990;Klika and Kraussová, 1993;Martínez and Escobar, 1995;Kurková et al, 2004) and subsurface environments (Wassenaar et al, 1990;Aravena and Wassenaar, 1993;Grøn et al, 1996;Artinger et al, 2000;Buckau et al, 2000;Schäfer et al, 2005).…”

Section: Introductionmentioning

confidence: 94%

Effects of oxidative weathering on the composition of organic matter in coal and sedimentary rock

Tamamura

Ueno

Aramaki

et al. 2015

Organic Geochemistry

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Section: Introductionmentioning

confidence: 94%

Effects of oxidative weathering on the composition of organic matter in coal and sedimentary rock

Tamamura

Ueno

Aramaki

et al. 2015

Organic Geochemistry

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“…The binding sites in HA and FA correspond mainly to the carboxylic and phenolic groups present, although N-and S-containing groups may also be relevant for metal ion binding [12]. Due to this metal retention capacity, HS play a potential role in the dispersion of metals in estuarine environments [8,[13][14][15]. Since HS are associated with fine sediments and particulate organic matter, they can contribute to the transfer of metals from the water column to the sediment [10,16].…”

Section: Introductionmentioning

confidence: 99%

“…The carbon isotope composition and C/N ratio of organic matter is a well-established tool to distinguish between terrestrial and marine organic matter in transitional environments [17,18]. Terrestrial plants fixation of CO 2 results in 13 C depletion of plant tissues relative to atmospheric CO 2 (having a δ 13 C value of −8‰) [19]. Freshwater aquatic C3 plants have typical δ 13 C values between −50 and −11‰ [20,21], whereas C4 plants exhibit a range of δ 13 C values between −17 to −9‰ [22].…”

Section: Introductionmentioning

confidence: 99%

“…Terrestrial plants fixation of CO 2 results in 13 C depletion of plant tissues relative to atmospheric CO 2 (having a δ 13 C value of −8‰) [19]. Freshwater aquatic C3 plants have typical δ 13 C values between −50 and −11‰ [20,21], whereas C4 plants exhibit a range of δ 13 C values between −17 to −9‰ [22]. C3 and C4 plants are characterized by C/N ratios ≥ 12 and >30 [23], respectively.…”

Section: Introductionmentioning

confidence: 99%

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Metal Binding and Sources of Humic Substances in Recent Sediments from the Cananéia-Iguape Estuarine-Lagoon Complex (South-Eastern Brazil)

et al. 2021

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The Cananéia-Iguape estuarine–lagoon complex (São Paulo state, Brazil) is a natural laboratory to study metal binding by humic substances (HS) in subtropical settings. This transitional environment is evolving into a freshwater environment due to water input from the Ribeira River, funneled through the Valo Grande Canal (Iguape). Past mining activities in the Ribeira River basin and maritime traffic are suspected to be potential sources of trace metals in the system. In this study, the trace metal contents of Free Humic Acids (FHA), Bound Humic Acids (BHA), and Fulvic Acids (FA) extracted from sedimentary organic matter were investigated. Moreover, the sources of HS were traced using their stable carbon isotope compositions and C/N ratios. The results suggested a mixed marine–terrestrial source of FHA, BHA, and FA. Copper and Cr were the most abundant trace metals bound to HS. On average, Cu showed concentrations of 176, 115, and 37.9 μg g−1 in FHA, BHA, and FA, respectively, whereas Cr showed average concentrations of 47.4, 86.3, and 43.9 μg g−1 in FHA, BHA, and FA, respectively. Marine FHA showed the highest binding capacity for trace metals, whereas terrestrial FA derived from the decay of mangrove organic matter showed the lowest binding capacity.

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“…Knowledge on trace element concentrations in humic substances is also of importance considering their growing use in industry and agriculture. Until now trace and major element concentrations has been analysed in aquatic humic substances [17], sedimentary humic acids [18] and peat humic acids [8,9].…”

Section: Introductionmentioning

confidence: 99%

A Study Of Major And Trace Element Accumulation In Humic Acids

Dudare

Purmalis

Kļaviņš

2015

ETR

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It has been widely studied recent as well as historic accumulation of elements in peat profiles depending on intensity of anthropogenic pollution and thereby peat profiles serve as archives for research of environmental change. Peat ability to accumulate major and trace elements depends on the character of element supply, potency of metal ions to bind functionalities in the peat structure, pH reaction, oxygen presence, presence of complexing compounds, inorganic ions and many other factors. The aim of this study is to assign major and trace element distribution in humic acids (HA) for two well characterized ombrotrophic peat profiles of Eipurs and Dzelve Bog and analyse factors affecting element concentration in peat humic acids. Elemental and functional analysis of the isolated HAs was done, using total reflection X – ray spectrometry, Elemental Analyzer Model EA – 1108, Thermospectronic Helios γ UV (Thermo Electron Co.) spectrophotometer, Total acidity method.

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Trace metals in humic acids from recent Skagerrak sediments

Cited by 11 publications

References 11 publications

Effects of oxidative weathering on the composition of organic matter in coal and sedimentary rock

Effects of oxidative weathering on the composition of organic matter in coal and sedimentary rock

Metal Binding and Sources of Humic Substances in Recent Sediments from the Cananéia-Iguape Estuarine-Lagoon Complex (South-Eastern Brazil)

A Study Of Major And Trace Element Accumulation In Humic Acids

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