Controlled variation of redox conditions in a floodplain soil: Impact on metal mobilization and biomethylation of arsenic and antimony

Frohne, Tina; Rinklebe, Jörg; Diaz-Bone, Roland A.; Laing, Gijs Du

doi:10.1016/j.geoderma.2010.10.012

Cited by 347 publications

(169 citation statements)

References 75 publications

(130 reference statements)

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“…Similarly, Pourbaix diagrams for various micronutrients (not shown) indicate that deficiency is more likely: (i) at a high pH and/or low Eh for Cu; (ii) at a high pH for Zn; (iii) at a very low Eh or a high pH for Ni; and iv) at a low Eh and pH for Mo. This is confirmed by field observations of Cu and Ni concentration, which increases in the soil solution with a rising Eh (Frohne et al 2011). …”

Section: Micronutrientssupporting

confidence: 60%

“…Iron is absorbed by plants in its soluble form as ferrous iron (Fe 2+ ). High concentrations of ferrous iron in the soil solution are observed at a low Eh, with a rapid decrease when the Eh rises above+ 350 mV (at pH 5), in relation to the formation of iron oxides and hydroxides (Frohne et al 2011). Ferrous iron toxicity is frequent at a low Eh and pH, and conversely, iron deficiency can occur at a high Eh and pH (Tanaka et al 1966).…”

Section: Ironmentioning

confidence: 99%

“…Dent (1993), Husson et al (2000b) and Macias and Camps Arbestain (2010) Eh, pH, and environmental issues In general, the concentration of heavy metals and pollutant metalloids in the soil solution is influenced by the combination of soil Eh and pH. Cadmium (Cd) and lead (Pb) concentrations are low at a low Eh and rise when the Eh increases, which can be attributed to interactions with dissolved organic carbon and manganese and precipitations such as sulfides (Frohne et al 2011;Stepniewska et al 2009). Cd solubility decreases with organic matter inputs because of the induced decrease in Eh and the increase in pH (Kashem and Singh 2001).…”

Section: Soil Eh and Ph And Soil Genesismentioning

confidence: 99%

“…Cd solubility decreases with organic matter inputs because of the induced decrease in Eh and the increase in pH (Kashem and Singh 2001). Conversely, the concentrations of the various forms of arsenic (As) and antimony (Sb) sharply decrease when the soil Eh increases, indicating that low Eh promotes the mobility of these compounds (Frohne et al 2011).…”

Section: Soil Eh and Ph And Soil Genesismentioning

confidence: 99%

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Redox potential (Eh) and pH as drivers of soil/plant/microorganism systems: a transdisciplinary overview pointing to integrative opportunities for agronomy

2012

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Background Oxidation-reduction and acid-base reactions are essential for the maintenance of all living organisms. However, redox potential (Eh) has received little attention in agronomy, unlike pH, which is regarded as a master variable. Agronomists are probably depriving themselves of a key factor in crop and soil science which could be a useful integrative tool. Scope This paper reviews the existing literature on Eh in various disciplines connected to agronomy, whether associated or not with pH, and then integrates this knowledge within a composite framework. Conclusions This transdisciplinary review offers evidence that Eh and pH are respectively and jointly major drivers of soil/plant/microorganism systems. Information on the roles of Eh and pH in plant and microorganism physiology and in soil genesis converges to form an operational framework for further studies of soil/plant/microorganism functioning. This framework is based on the hypothesis that plants physiologically function within a specific internal Eh-pH range and that, along with microorganisms, they alter Eh and pH in the rhizosphere to ensure homeostasis at the cell level. This new perspective could help in bridging several disciplines related to agronomy, and across micro and macro-scales. It should help to improve cropping systems design and management, in conventional, organic, and conservation agriculture.

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Section: Micronutrientssupporting

confidence: 60%

Section: Ironmentioning

confidence: 99%

Section: Soil Eh and Ph And Soil Genesismentioning

confidence: 99%

Section: Soil Eh and Ph And Soil Genesismentioning

confidence: 99%

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Redox potential (Eh) and pH as drivers of soil/plant/microorganism systems: a transdisciplinary overview pointing to integrative opportunities for agronomy

2012

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“…A recent report has shown that As methylation in soils increases with the decreasing in redox potential (Eh), suggesting that As volatilization may be more efficient under anaerobic conditions (Frohne et al, 2011). The majority of work on As volatilization has focused on bacteria in the anaerobic ecosystems.…”

Section: Bacteriamentioning

confidence: 99%

A review on completing arsenic biogeochemical cycle: Microbial volatilization of arsines in environment

Wang¹,

Sun²,

Jia³

et al. 2014

Journal of Environmental Sciences

146

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a b s t r a c t Arsenic (As) is ubiquitous in the environment in the carcinogenic inorganic forms, posing risks to human health in many parts of the world. Many microorganisms have evolved a series of mechanisms to cope with inorganic arsenic in their growth media such as transforming As compounds into volatile derivatives. Bio-volatilization of As has been suggested to play an important role in global As biogeochemical cycling, and can also be explored as a potential method for arsenic bioremediation. This review aims to provide an overview of the quality and quantity of As volatilization by fungi, bacteria, microalga and protozoans. Arsenic bio-volatilization is influenced by both biotic and abiotic factors that can be manipulated/elucidated for the purpose of As bioremediation. Since As biovolatilization is a resurgent topic for both biogeochemistry and environmental health, our review serves as a concept paper for future research directions.

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Increasing concentrations of iron in surface waters as a consequence of reducing conditions in the catchment area

et al. 2016

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Recent studies report trends of strongly increasing iron (Fe) concentrations in freshwaters. Since Fe is a key element with a decisive role in the biogeochemical cycling of major elements, it is important to understand the mechanisms behind these trends. We hypothesized that variations in Fe concentration are driven mainly by redox dynamics in hydraulically connected soils. Notably, Fe(III), which is the favored oxidation state except in environments where microbial activity provide strong reducing intensity, has several orders of magnitude lower water solubility than Fe(II). To test our hypothesis, seasonal variation in water chemistry, discharge, and air temperature was studied in three Swedish rivers. Methylmercury and sulfate were used as indicators of seasonal redox changes. Seasonal variability in water chemistry, discharge, and air temperature in the Emån and Lyckeby Rivers implied that the variation in Fe was primarily driven by the prevalence of reducing conditions in the catchment. In general, high Fe concentrations were observed when methylmercury was high and sulfate was low, indicative of reducing conditions. The Fe concentrations showed no or weak relationships with variations in dissolved organic matter concentration and aromaticity. The seasonal variation in Fe concentration of the Ume river was primarily dependent on timing of the snowmelt in high‐ versus low‐altitude areas of the catchment. There were long‐term trends of increasing temperature in all catchments and also trends of increasing discharge in the southern rivers, which should increase the probability for anaerobic conditions in space and time and thereby increase Fe transport to the aquatic systems.

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Controlled variation of redox conditions in a floodplain soil: Impact on metal mobilization and biomethylation of arsenic and antimony

Cited by 347 publications

References 75 publications

Redox potential (Eh) and pH as drivers of soil/plant/microorganism systems: a transdisciplinary overview pointing to integrative opportunities for agronomy

Redox potential (Eh) and pH as drivers of soil/plant/microorganism systems: a transdisciplinary overview pointing to integrative opportunities for agronomy

A review on completing arsenic biogeochemical cycle: Microbial volatilization of arsines in environment

Increasing concentrations of iron in surface waters as a consequence of reducing conditions in the catchment area

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