Reductive solubilization of arsenic in a mining-impacted river floodplain: Influence of soil properties and temperature

Simmler, Michael; Bommer, Jérôme; Frischknecht, Sarah; Christl, Iso; Kotsev, Tsvetan; Kretzschmar, Ruben

doi:10.1016/j.envpol.2017.08.054

Cited by 28 publications

(23 citation statements)

References 47 publications

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“…Mean Q 10 values calculated for Fe 2+ (3.6 ± 1.8) are broadly consistent with those reported by other studies examining Fe(III) reduction (Meier et al, 2005; Pallud et al, 2020; Schilling et al, 2019). Likewise, mean Q 10 values for As/As 3+ mobilization rates (2.6 and 3.3, respectively) are similar to Fe 2+ and also consistent with those reported previously by Simmler et al (2017). Sb contrasts notably, with an apparent negative temperature dependency during the initial 72 h of incubation.…”

Section: Resultssupporting

confidence: 91%

“…Water Resources Research mobilization rates (2.6 and 3.3, respectively) are similar to Fe 2+ and also consistent with those reported previously by Simmler et al (2017). Sb contrasts notably, with an apparent negative temperature dependency during the initial 72 h of incubation.…”

Section: 1029/2020wr028196supporting

confidence: 91%

“…Seasonal temperature fluctuations could therefore conceivably impact the speciation and thus mobility of As and Sb in aquatic systems, particularly where seasonal temperature fluctuations are sufficient to influence the redox conditions of benthic sediments and the hyporheic zone (e.g., Burke et al, 2014; Danczak et al, 2016; Henzler et al, 2016). A number of laboratory‐based studies demonstrate that for saturated soils and sediments subject to reducing conditions, the magnitude of As mobilization displays a strong positive dependence on temperature, largely linked to enhanced reduction of As(V) (e.g., Bonte et al, 2013; Lüders et al, 2020; Simmler et al, 2017; Weber et al, 2010). Similarly, reduction of Fe(III) oxide minerals is also strongly positively dependent upon temperature (Meier et al, 2005; Pallud et al, 2020; Schilling et al, 2019), which could have implications for any As or Sb bound to Fe(III) oxides.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal Temperature Oscillations Drive Contrasting Arsenic and Antimony Mobilization in a Mining‐Impacted River System

Johnston

Karimian

Burton

2020

Water Resources Research

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Arsenic (As) and antimony (Sb) speciation and mobility in river systems can be influenced by the redox conditions of benthic and hyporheic zone sediments. However, our understanding of how temperature fluctuations influence riverine As and Sb mobility over diel and seasonal time frames, via moderation of sediment redox conditions, is poorly constrained. Here we compare diel and seasonal water quality data from a river system contaminated with As and Sb with results from sediment-water incubations conducted at temperatures spanning 8°C to 32°C under low-dissolved oxygen conditions. Higher incubation temperatures caused faster microbial respiration, lower redox potential, and greater As aq concentrations, coincident with reduction of As(V), Mn (III/IV), Fe (III), and SO 4 2−. Initial rates of As 3+ aq formation increased exponentially with temperature (Q 10 = 3.3 ± 0.5) and were positively correlated with microbial respiration (r 2 = 0.99, P < 0.01). In contrast, Sb aq displayed an initially negative and comparatively weak overall temperature dependence during incubations. In river waters, diel mobilization of reduced species (As 3+ aq and Fe 2+ aq) and contrasting attenuation of Sb was coincident with lower redox potential during nightly respiration cycles. Distinct seasonal oscillations in river water As aq were exponentially correlated with temperature (r 2 = 0.68, P < 0.01), whereas Sb aq was not. These characteristics reflect the fundamental role of anaerobic metabolism (as influenced by temperature) within benthic and hyporheic zone sediments as a key driver of contrasting riverine As and Sb mobility. The findings imply that riverine As mobility may be enhanced, while Sb mobility possibly attenuated, by eutrophication or by elevated stream temperatures due to a warming climate.

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Section: Resultssupporting

confidence: 91%

Section: 1029/2020wr028196supporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Seasonal Temperature Oscillations Drive Contrasting Arsenic and Antimony Mobilization in a Mining‐Impacted River System

Johnston

Karimian

Burton

2020

Water Resources Research

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“…Not much research has been published on the effects of decreasing dissolved oxygen concentrations in a TSF impacting on arsenic flux into the surface waters. However, a number of studies have been conducted on arsenic fluxing from sediments and becoming mobile in rivers (Gorny et al, 2015;Simmler et al, 2017), coastal soils (LeMonte et al, 2017, lakes impacted by mining (Martin and Pedersen, 2002;Azcue et al, 1994) as well as from marine sediments (Atkinson et al, 2007). All these studies point to redox reactions at the sediment surface as contributing factors in the mobilisation of arsenic whether into surface waters of rivers, seas, lakes and soils.…”

Section: Figure 4-3: Cross Section Showing Elements Of a Typical Convmentioning

confidence: 99%

“…A favourable arsenic species for the Gold Ridge case is As (V), because this species tends to adsorb strongly to oxyhydroxides of Fe, Mn and Al in their solid phase and hence has less tendency to become mobile (Xu et al, 2017a;Simmler et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Investigating the elevated arsenic concentrations in the Gold Ridge tailings storage facility surface water

Jacob-Tatapu¹

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Declaration by author This thesis is composed of my original work, and contains no material previously published or written by another person except where due reference has been made in the text. I have clearly stated the contribution by others to jointly-authored works that I have included in my thesis. I have clearly stated the contribution of others to my thesis as a whole, including statistical assistance, survey design, data analysis, significant technical procedures, professional editorial advice, financial support and any other original research work used or reported in my thesis. The content of my thesis is the result of work I have carried out since the commencement of my higher degree by research candidature and does not include a substantial part of work that has been submitted to qualify for the award of any other degree or diploma in any university or other tertiary institution. I have clearly stated which parts of my thesis, if any, have been submitted to qualify for another award. I acknowledge that an electronic copy of my thesis must be lodged with the University Library and, subject to the policy and procedures of The University of Queensland, the thesis be made available for research and study in accordance with the Copyright Act 1968 unless a period of embargo has been approved by the Dean of the Graduate School.

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Poorly Soluble and Mobile Forms of Heavy Metals in the Soils of the Volga Steppes

Pronko

Zhuravlev

Yaroshenko

et al. 2021

Advances in Understanding Soil Degradation

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Reductive solubilization of arsenic in a mining-impacted river floodplain: Influence of soil properties and temperature

Cited by 28 publications

References 47 publications

Seasonal Temperature Oscillations Drive Contrasting Arsenic and Antimony Mobilization in a Mining‐Impacted River System

Seasonal Temperature Oscillations Drive Contrasting Arsenic and Antimony Mobilization in a Mining‐Impacted River System

Investigating the elevated arsenic concentrations in the Gold Ridge tailings storage facility surface water

Poorly Soluble and Mobile Forms of Heavy Metals in the Soils of the Volga Steppes

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