Measurement of Heavy Metal Speciation over Redox Gradients in Natural Water−Sediment Interfaces and Implications for Uptake by Benthic Organisms

Vink, Jos P.M.

doi:10.1021/es0200701

Cited by 59 publications

(51 citation statements)

References 24 publications

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“…Cooper et al (2000), who studied the formation of mineral phases during reduction, stated that microbial reduction of Fe(III) was inhibited when NO 3 − was present as an alternative electron acceptor. In this study, denitrification and Mn(IV) and Fe(III) reduction occurred simultaneously, and even simultaneous Fe(III) and SO 4 2− reduction was reported earlier (Postma and Jakobsen 1996;Vink 2002). Francis and Dodge (1990) showed that the release of metals from Fe-oxyhydroxides was facilitated by microbial action, and that dissolved Mn(II) facilitated this mechanism (Guha et al 2001).…”

Section: Floodplain Soil Reductionsupporting

confidence: 69%

“…The top 0.05-0.35 m was sampled in an undisturbed manner using SOFIE® cells (Sediment or Fauna Incubation Experiment), described in detail by Vink (2002). These cells enable undisturbed sampling, and accurate probing of pore water over time, while the redox status maintains intact.…”

Section: Floodplain Soil Reductionmentioning

confidence: 99%

“…This site is scheduled for redevelopment works, and large amounts of soil are destined to be stored in former sand pits. Former studies from this site included detailed sampling for characterisation and modelling studies (Vink 1999). The mean content of S was 17.8±9.1 (SD) mmole.kg −1 (n=18), and it was concluded earlier that this amount may be insufficient to bind all available metals in the sediment when stored under anaerobic conditions.…”

Section: Gypsum Amendmentmentioning

confidence: 99%

“…Starting values for the model schematization were adapted from Tables 1 and 2. Pore water compositions from both oxic and reduced layers in soil cores of the same site from an earlier campaign (Vink 1999) were used to validate the model for this purpose.…”

Section: Speciation Modellingmentioning

confidence: 99%

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Delayed immobilization of heavy metals in soils and sediments under reducing and anaerobic conditions; consequences for flooding and storage

Vink

Harmsen²,

Rijnaarts

2010

J Soils Sediments

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Purpose The consequences of permanent inundation and storage of flood plain soils and aquatic sediments on metal mobility were studied. The main goal was to quantify kinetic mobilisation processes in order to pinpoint the conditions that pose emission risks to groundwater and surface waters. Materials and methods Anaerobic pore water compositions of six existing depots, containing sediments from either aquatic or terrestrial origin, were measured to obtain reliable field references. Reduction experiments were performed with SOFIE cells, in which time-dynamic measurements of reducing pore waters were carried out at the reigning redox conditions. A parallel experiment tested the possibility if sulfide-deficiencies could be compensated by the reduction of added gypsum, thus increasing the available pool of reactive S. Model calculations were performed to distinguish between the thermodynamic and kinetic processes. Results and discussion Reduction of flood plain soils showed that dissolved organic matter (DOM) concentrations increased up to 7-fold over time, as a result of nutrient-mediated metabolic boost of organic matter degrading microorganisms. The association of metals to DOM increased significantly due to the loss of reactive Mn-oxide and Fe-oxyhydroxide sorption phases during reduction. DOM released metals only slowly, therefore kinetically hindering the phase shifting to stable metalsulfide precipitates. The observed effects lasted at least 10 months. In aquatic sediments, reduction rates of sulphates were six times faster, and the release of DOM occurred in lower amounts than in soils from terrestrial origin. It is shown that the addition of gypsum stimulates the formation of sulfides, thereby decreasing dissolved concentrations of most metals. On the short term however, the addition of gypsum leads to elevated concentrations of Zn and Cd due to increased electrolyte strength and subsequent Ca-metal-competition for sorption sites. This effect may be eliminated by not only adding an electron acceptor to the sediment, but also an effective donor, e.g., degradable organic matter. Conclusions For depots containing flood plain soils, the same kinetic mechanisms were observed as in the reduction experiments (elevated production of DOM and associated metals). It was concluded that reduction of flood plain soils may not necessarily result in efficient metal trapping. When storage is considered, a distinction should be made between sediments of terrestrial and aquatic origin.

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Section: Floodplain Soil Reductionsupporting

confidence: 69%

Section: Floodplain Soil Reductionmentioning

confidence: 99%

Section: Gypsum Amendmentmentioning

confidence: 99%

Section: Speciation Modellingmentioning

confidence: 99%

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Delayed immobilization of heavy metals in soils and sediments under reducing and anaerobic conditions; consequences for flooding and storage

Vink

Harmsen²,

Rijnaarts

2010

J Soils Sediments

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“…In fact, this modeling framework defines bioavailability of TM. Dissolved TM exists in solution partially as free TM ion [89,90]. This species is hypothesized to be the bioavailable species in more simplified versions of the free ion activity model of toxicity.…”

Section: Risks Assessment In Aquatic Environmentsmentioning

confidence: 99%

Fate of Trace Metals in Anaerobic Digestion

Fermoso

Hullebusch²,

Guibaud

et al. 2015

Advances in Biochemical Engineering/Biotechnology

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A challenging, and largely uncharted, area of research in the field of anaerobic digestion science and technology is in understanding the roles of trace metals in enabling biogas production. This is a major knowledge gap and a multifaceted problem involving metal chemistry; physical interactions of metal and solids; microbiology; and technology optimization. Moreover, the fate of trace metals, and the chemical speciation and transport of trace metals in environmentsoften agricultural lands receiving discharge waters from anaerobic digestion processes -is completely unknown but simultaneously represents challenges for environmental protection and opportunities to close process loops in anaerobic biotechnologies. Affiliation 1.

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SOFIE : An Optimized Approach for Exposure Tests and Sediment Assays

2004

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The use of biological sensors, rather than chemical measurements, appears promising for risk assessments of contaminated environments provided that the assay is able to mimic natural conditions. As an alternative to the standard bioassay protocol, a new technique was developed that meets this requirement, leaving sample and geochemical conditions intact. Exposure tests were conducted with two aquatic species that occur in sediment and water, respectively. Comparison between the two methods showed that the standard protocol tends to overestimate risks for PAHs and underestimates the risks for heavy metals, in terms of accumulated amounts. Sample handling largely affected chemical speciation, and exposure concentrations deviated from the ones observed in the undisturbed setting. This new approach may contribute to better‐founded quality criteria for sediments.

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Measurement of Heavy Metal Speciation over Redox Gradients in Natural Water−Sediment Interfaces and Implications for Uptake by Benthic Organisms

Cited by 59 publications

References 24 publications

Delayed immobilization of heavy metals in soils and sediments under reducing and anaerobic conditions; consequences for flooding and storage

Delayed immobilization of heavy metals in soils and sediments under reducing and anaerobic conditions; consequences for flooding and storage

Fate of Trace Metals in Anaerobic Digestion

SOFIE : An Optimized Approach for Exposure Tests and Sediment Assays

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