Heavy Metals Desorption from Synthesized and Natural Iron and Manganese Oxyhydroxides: Effect of Reductive Conditions

Davranche, Mélanie; Bollinger, Jean‐Claude

doi:10.1006/jcis.2000.6904

Cited by 85 publications

(59 citation statements)

References 24 publications

(23 reference statements)

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“…The aging of Zn-containing coprecipitates could have further contributed to Zn stabilization as suggested by the findings of Davranche and Bollinger. 28 These processes could also explain the relatively low and decreasing concentrations of Zn in the oxic soil leachates with successive redox cycles (Fig. 3).…”

Section: Column Experimentsmentioning

confidence: 95%

Leaching potential of metallic elements from contaminated soils under anoxia

Balint

Nechifor

Ajmone-Marsan

2014

Environ. Sci.: Processes Impacts

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Environmental ImpactThe higher frequency and intensity of extreme rainfall events, as well as the variations in precipitation patterns and intensities as a result of climate change may cause important shifts in soil hydrological regime. This could expose contaminated soils to significant variations in redox potentials possibly influencing metallic element behaviour and their potential transfer to other environmental compartments. This study shows that alternating soil redox conditions may enhance the release and redistribution of metals in more labile fractions. In particular, the presence of redox-sensitive minerals, such as chalcopyrite, in soils affected by mine tailings, could release significant amounts of Cu due to the alternating redox conditions and therefore have important environmental implications. Graphical abstractThe alternation of redox cycles may play a higher role in the release, leaching and redistribution of metallic elements from contaminated soils with respect to oxidizing and reducing conditions alone. AbstractUnderstanding metallic element (ME) behaviour in soils subjected to alternating redox conditions is of significant environmental importance, particularly for contaminated soils. Although variations in the hydrological status of soils may lead to the release of ME, redox-driven changes in ME dynamics are still not sufficiently understood. We studied the effects of alternating redox cycles 2 on the release, leaching and redistribution of Zn, Cu and Pb in metal mine-contaminated and noncontaminated soils by means of a column experiment. Although the release of Zn was promoted by the onset of reductive conditions, successive redox cycles favoured metal partitioning in less labile fractions limiting its further mobilization. The release of Cu in soil porewaters and redistribution in the solid phase towards more labile pools were strongly dependent on the alternation between oxidizing and reducing conditions. In contaminated soils, the presence of chalcopyrite could have determined the release of Cu under oxic conditions and its relative immobilization under subsequent anoxic conditions. The behaviour of Pb did not seem to be influence by redox status, although higher concentrations in the column leachates with respect to soil porewaters suggested that alternating redox conditions could nonetheless result in substantial mobilization. This study provides evidence that the alternation of soil redox conditions may play a more important role in determining the release and leaching of metallic elements from soils with respect to reducing or oxidizing conditions considered separately.

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Section: Column Experimentsmentioning

confidence: 95%

Leaching potential of metallic elements from contaminated soils under anoxia

Balint

Nechifor

Ajmone-Marsan

2014

Environ. Sci.: Processes Impacts

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“…2). Importantly, the reductive dissolution of Fe (oxy-hydr)oxide minerals leads to the release of adsorbed and co-precipitated pollutants into the pore waters, potentially representing a significant source of pollutants into the overlying water column [69]. For example, the reducing conditions associated with flooded rice paddies results in the release of high concentrations of As(III) to the soil porewater [70,71].…”

Section: Contaminant-mineral Interactions In Sub-oxic and Anoxic Sedimentioning

confidence: 99%

Application, Chemical Interaction and Fate of Iron Minerals in Polluted Sediment and Soils

Heyden

Roychoudhury

2015

Curr Pollution Rep

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Due to the high surface reactivity and redox chemistry, iron (Fe) minerals have a strong control on contaminant speciation, mobility and degradation. This has been well established for sediment and solution systems, and this review evaluates the role of Fe minerals in contaminant cycling from a sediment pollution perspective. Sediment redox conditions govern the Fe mineralogy, and a detailed description is given for Fe mineral interactions with contaminants in both oxic and sub/anoxic sediment horizons. These interactions include contaminant immobilisation through adsorption and coprecipitation mechanisms and contaminant degradation and speciation changes caused by Fe redox chemistry. Based on these reductive and adsorptive capabilities, recent advances in Fe amendment technologies, particularly in the field of engineered zero-valent Fe nanoparticles, have shown promising results for the treatment of polluted soils and sediments. However, the variable chemical and physical dynamics of sediment systems remains a limitation to the global application of these technologies.

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“…1) and DOM ( Fig. 2) with successive redox cycles could include: (i) the increase in the retention of Cu and/or Cu-OM complexes on new binding sites exposed during the reductive dissolution of Fe/Mn (hydr)oxides (Charlatchka and Cambier, 2000;Zheng and Zhang, 2011); and (ii) the lower dissolution kinetics of coprecipitated Cu (Davranche and Bollinger, 2000).…”

Section: Influence Of Redox Alternation On Fe Mn Dom and Cu Dynamicmentioning

confidence: 99%

“…Consequently, urban soils may be subject to water saturation for short periods of time following intense storms, therefore leading to changes in soil redox conditions. Most research on Cu dynamics in soils has focused on the stability, release and mobility of Cu associated with Fe and/or Mn (hydr)oxides (Davranche and Bollinger, 2000;Loomer et al, 2011;Matocha et al, 2005), or OM (Amery et al, 2008;Businelli et al, 2009;Hernandez-Soriano and Jimenez-Lopez, 2012). Only few studies assessed the interdependence between these soil constituents in the attempt to identify the key processes controlling Cu release (Grybos et al, 2007;Parat et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Copper dynamics under alternating redox conditions is influenced by soil properties and contamination source

Balint

Said-Pullicino

Ajmone-Marsan

2015

Journal of Contaminant Hydrology

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Understanding the effect of soil redox conditions on contaminant dynamics is of significant importance for evaluating their lability, mobility and potential transfer to other environmental compartments. Under changing redox conditions, soil properties and constituents such as Fe and Mn (hydr)oxides and organic matter (OM) may influence the behaviour of associated metallic elements (ME). In this work, the redox-driven release and redistribution of Cu between different soil pools was studied in three soils having different contamination sources. This was achieved by subjecting soil columns to a series of alternating reducing and oxidizing cycles under non-limiting C conditions, and assessing their influence on soil pore water, leachate and solid phase composition. Results showed that, in all soils, alternating redox conditions led to an increase in the distribution of Cu in the more labile fractions, consequently enhancing is susceptibility to loss. This was generally linked to the redox-driven cycling of Fe, Mn and dissolved organic matter (DOM). In fact, results suggested that the reductive dissolution of Fe and Mn (hydr)oxides and subsequent reprecipitation as poorly-ordered phases under oxic conditions, contributed to the release and mobilization of Cu and/or Cu-containing organometallic complexes. However, the behaviour of Cu, as well as the mechanisms controlling Cu release and loss with redox cycling, were influenced by both soil properties (e.g. pH, contents of easily reducible Fe and Mn (hydr)oxides) and source of Cu contamination.

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Heavy Metals Desorption from Synthesized and Natural Iron and Manganese Oxyhydroxides: Effect of Reductive Conditions

Cited by 85 publications

References 24 publications

Leaching potential of metallic elements from contaminated soils under anoxia

Leaching potential of metallic elements from contaminated soils under anoxia

Application, Chemical Interaction and Fate of Iron Minerals in Polluted Sediment and Soils

Copper dynamics under alternating redox conditions is influenced by soil properties and contamination source

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