Influence of late-Holocene climate change on the solid-phase speciation and long-term stability of arsenic in sub-Arctic lake sediments

Miller, Clare B.; Parsons, Michael B.; Jamieson, Heather E.; Ardakani, Omid H.; Gregory, Braden R.B.; Galloway, Jennifer M.

doi:10.1016/j.scitotenv.2019.136115

Cited by 15 publications

(17 citation statements)

References 89 publications

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“…These grain-scale observations suggest that redox conditions are likely to be heterogeneous at a given depth in the near-surface sediments, and will depend in part of the spatial distribution of particulate OM. The role of reactive OM in the precipitation of authigenic As-bearing minerals has previously been demonstrated in both laboratory (Kirk et al, 2004(Kirk et al, , 2010) and field-based sediment studies (e.g., Langner et al, 2011;Galloway et al, 2018;Wang et al, 2018;Miller et al, 2020).…”

Section: Omas and As Sequestrationmentioning

confidence: 86%

“…Operational conditions and post-hoc data processing are detailed in Miller et al (2020). The distribution of oxidation states reported are component sums, normalized to 100%.…”

Section: Bulk X-ray Absorption Near-edge Structure (Xanes)mentioning

confidence: 99%

“…As a result, the diffusion of As into porewaters may be abated by the presence of solid-phase OM in near-surface sediment. The net effect of these competing processes is difficult to predict as the present-day mineral hosts for As vary between lakes, which, in turn, will influence their long-term stability under changing redox conditions (Miller et al, 2019(Miller et al, , 2020Palmer et al, 2019).…”

Section: Implications For Long-term Environmental Monitoringmentioning

confidence: 99%

“…However, the grain-scale associations between As and solid-phase OM have not been studied in detail and are important for determining the mechanism of solid OM control on As mobility. This study aims to address the knowledge gaps presented in Galloway et al (2018) and Miller et al (2019Miller et al ( , 2020 and focuses specifically on determination of the origin of the solid-phase OM in lake sediments, and the variable influence of aquatic-and terrigenous-derived OM on the mobility of As in three mining-impacted, sub-Arctic lakes located in the central Northwest Territories (NT), Canada.…”

Section: Introductionmentioning

confidence: 99%

“…Previous work (Galloway et al, 2018;Miller et al, 2019Miller et al, , 2020 shows that labile OM affects As mobility and fate through its influence on the redox environment of near-surface sediment and long-term stability of As-bearing minerals. However, the grain-scale associations between As and solid-phase OM have not been studied in detail and are important for determining the mechanism of solid OM control on As mobility.…”

Section: Introductionmentioning

confidence: 99%

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Grain-Scale Analysis of Solid-Phase Organic Matter and Arsenic Mobility in Mining-Impacted 1 Sediment from Sub‐Arctic Lakes, Northwest Territories, Canada

Miller

Parsons

Jamieson

et al. 2021

Preprint

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Arsenic (As) is commonly sequestered at the sediment-water interface (SWI) in mining-impacted lakes through adsorption and/or co-precipitation with authigenic iron (Fe)-(oxy)hydroxides or sulphides. The results of this study demonstrate that the accumulation of solid-phase organic matter (OM) in near-surface sediments also influences the mobility and fate of As in sub-Arctic lakes. Sediment gravity cores, sediment grab samples, and porewaters were collected from three lakes downstream of the former Tundra gold mine, Northwest Territories. Analysis of sediment using combined micro-X-ray fluorescence/diffraction, K-edge X-ray Absorption Near-Edge Structure (XANES), and organic petrography shows that As is associated with both aquatic (benthic and planktonic alginate) and terrestrially-derived OM (cutinite; funginite). Most As is hosted by fine-grained Fe-(oxy)hydroxides or sulphide minerals ( e.g., goethite, orpiment, lepidocrocite, mackinawite); however, grain-scale synchrotron-based analysis shows that As is also associated with amorphous OM. Mixed As oxidation states in porewater (median = 62 % As (V), 18 % As (III); n = 20) and sediment (median = 80 % As (-I) and (III), 19 % As (V); n = 9) indicate the presence of variable redox conditions in the near-surface sediment and suggest that post-depositional remobilization of As has occurred . Detailed characterization of As-bearing OM at and below the SWI suggests that OM plays an important role in stabilizing redox-sensitive authigenic minerals and associated As. Based on these findings, it is expected that increased concentrations of labile OM will drive post-depositional surface-enrichment of As in mining-impacted lakes and may increase or decrease As flux from sediments to overlying surface waters.

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Section: Omas and As Sequestrationmentioning

confidence: 86%

“…Operational conditions and post-hoc data processing are detailed in Miller et al (2020). The distribution of oxidation states reported are component sums, normalized to 100%.…”

Section: Bulk X-ray Absorption Near-edge Structure (Xanes)mentioning

confidence: 99%

Section: Implications For Long-term Environmental Monitoringmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Grain-Scale Analysis of Solid-Phase Organic Matter and Arsenic Mobility in Mining-Impacted 1 Sediment from Sub‐Arctic Lakes, Northwest Territories, Canada

Miller

Parsons

Jamieson

et al. 2021

Preprint

Self Cite

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A study on the effects of anion, cation, organic compounds, and pH on the release behaviors of As and Sb from sediments

Wang

Goméz

et al. 2021

Environ Sci Pollut Res

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Differences in the composition, source, and stability of suspended particulate matter and sediment organic matter in Hulun Lake, China

Wang

Chen

Wang

et al. 2022

Environ Sci Pollut Res

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Sediment (SOM) and suspended particulate (SPOM) organic matters are two important organic matters in water. Their occurrence, migration and transformation, and stability have important effects on the environmental behaviors of carbon, nitrogen, phosphorus, and other pollutants in a water environment. The content, composition, fluorescence characteristics, source, and stability of SOM and SPOM in Hulun Lake, a typical lake in cold and arid region of China, were compared by sequential extraction, three-dimensional fluorescence spectroscopy, parallel factor technique, carbon-nitrogen ratio, and stable carbon isotope. SOM and SPOM in north and west were higher than those in east and south. The average content of SPOM (24.70 ± 4.63 g/kg) was slightly higher than that of SOM (23.04 ± 10.27 g/kg), but the difference was not significant. Humin was the dominant component in SOM and SPOM, accounting for 73.7% and 61.2%, respectively. Humus was the main fluorescence component of water-extractable organic matter in SOM and SPOM, accounting for 79.9% and 70.4%, respectively, of the total fluorescence intensity. SOM and SPOM were derived from terrestrial sources with relative contribution rate of about 70%. SPOM was more influenced by autochthonous sources and had significantly lower humification degree and stability than SOM. Effects of climate changes on migration, transformation, stability, and bioavailability of organic matters and endogenous pollutants closely related to organic matters in lakes of cold and arid regions should be paid attention in the future.

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Influence of late-Holocene climate change on the solid-phase speciation and long-term stability of arsenic in sub-Arctic lake sediments

Cited by 15 publications

References 89 publications

Grain-Scale Analysis of Solid-Phase Organic Matter and Arsenic Mobility in Mining-Impacted 1 Sediment from Sub‐Arctic Lakes, Northwest Territories, Canada

Grain-Scale Analysis of Solid-Phase Organic Matter and Arsenic Mobility in Mining-Impacted 1 Sediment from Sub‐Arctic Lakes, Northwest Territories, Canada

A study on the effects of anion, cation, organic compounds, and pH on the release behaviors of As and Sb from sediments

Differences in the composition, source, and stability of suspended particulate matter and sediment organic matter in Hulun Lake, China

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