Iron and manganese in lakes

Davison, William

doi:10.1016/0012-8252(93)90029-7

Cited by 759 publications

(572 citation statements)

References 149 publications

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“…Thermodynamic calcula tions confirm that sulphide accumulation is to be expected when iron(II) levels in sediment pore water become very low (Yoshida & Tadano, 1978). The marked increase of calcium and magnesium following iron(II) addition is most probably caused by the exchange of these bivalent ions with iron(II) on the cation exchange sites of sediment particles (Ponnamperuma, 1972;Schachtschnabel et aL, 1992), the formation of iron(II) carbonate (siderite) (Davison, 1993), and acid-neutralizing reactions such as:…”

Section: Discussionmentioning

confidence: 99%

Prevention of sulphide accumulation and phosphate mobilization by the addition of iron(II) chloride to a reduced sediment: an enclosure experiment

1995

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SUMMARY1. In an enclosure experiment carried out in a ditch receiving sulphate-enriched seepage water, iron(II) chloride was added to the sedim ent In the sediment pore water of the iron-treated enclosures sulphide levels decreased to very low values (< 1 jumol I"1) immediately after the iron addition while in the control enclosures sulphide reached values up to 500 \imol I-1. 2. The sulphide levels in the sediment pore water were also strongly correlated w ith temperature. In summer, phosphate m obilization was observed in the non-treated enclosures while in the iron-treated enclosures phosphate levels remained low. 3. Total phosphate levels increased greatly in the water layer of the noivtreated enclosures, coincident with an algal bloom and increased turbidity. It is suggested that phosphate mobilization in summer is caused by the reduction of iron(III) phosphate complexes and in this high sulphate water body probably also by the reduction of iron(III) by sulphide and the consequential precipitation of iron(II) sulphide. 4. Iron addition appeared to prevent sulphide toxicity in Potamogeton acutifolius Link which was planted in the enclosures immediately after iron(II) addition. In the non-irontreated enclosures P. acutifolius plants decayed w ithin a few weeks probably as a result of sulphide toxicity

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Section: Discussionmentioning

confidence: 99%

Prevention of sulphide accumulation and phosphate mobilization by the addition of iron(II) chloride to a reduced sediment: an enclosure experiment

1995

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“…Ces variations concernent en premier lieu les nutriments (cf. WETZEL, 1983 ;.GAILU\RD, 1995 ;MlCHARD, 2002), les éléments dont la solubilité est liée aux conditions redox, comme le fer et le manganèse (MORTIMER, 1941 ;DAVISON, 1993 ;HAMILTON-TAYLOR and DAVISON, 1995) et aussi des élé-ments trace comme le cobalt (BALISTRIERI et al, 1992(BALISTRIERI et al, , 1994TAILLEFERT et al, 2002), le baryum (SUGlYAMAef al., 1992 ;VIOLLIER, 1995) ou le vanadium (Viollier efa/.,1995).…”

Section: -Introductionunclassified

Vitesses de réaction de dissolution et précipitation au voisinage de l'interface oxydo-réducteur dans un lac méromictique : le lac Pavin (Puy de Dôme, France)

Michard¹,

Jézéquel²,

Viollier³

2005

rseau

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Une étude à l'échelle centimétrique de l'interface redox situé à la limite entre mixolimnion et monimolimnion d'un lac méromictique (le lac Pavin) a permis d'observer très finement l'évolution de la concentration d'un certain nombre d'éléments chimiques. Nous avons choisi de présenter ici des résultats concernant 5 éléments qui présentent des comportements très contrastés : le rubidium, le fer, le baryum, le vanadium et le manganèse. La comparaison avec un élément conservatif, le sodium, montre que Rb est conservatif, que Fe, Ba et V sont précipités et que Mn est dissous dans cette zone.Une modélisation de ces concentrations en vue de préciser à quelle profondeur et avec quelle vitesse se produisent les réactions concernant ces éléments nécessite la détermination des paramètres de transport au voisinage de cet interface.Une représentation analytique des concentrations de sodium permet de calculer le coefficient de diffusion turbulente Kz en fonction de la profondeur. Au voisinage de l'interface redox, ce coefficient est très petit (0,0017m2/jour) et inférieur au coefficient de diffusion thermique moléculaire.Les concentrations des éléments étudiés ont pu être représentés avec précisions par des polynômes en fonction de la concentration en sodium.Cela permet d'estimer les vitesses des réactions de précipitation dissolution en fonction de la profondeur. Le rubidium n'est affecté par aucune réaction. Le fer précipite entre 63 et 65 m, le baryum entre 68 et 72 m tandis que le vanadium précipite à la fois dans ces 2 zones. Le manganèse réagit dans une zone très étroite : il est précipité entre 61,5 et 62 m et dissous entre 62,8 et 63,1 m.Une étude similaire de tous les éléments majeurs (y compris pH et COD) pourrait permettre d'élucider les processus qui conduisent à ces comportements complexes.Lake Pavin, French Massif Central, is the main meromictic lake in France and has been extensively studied from more than 50 years. The upper part (mixolimnion) at a depth of less than about 60 m behaves as an oligotrophic lake and is oxic during the major part of the year. The lower layer (monimolimnion) has a higher salinity and is permanently anoxic. Unlike the top of the mixolimnion, element concentrations in the monimolimnion can be considered at steady state. The boundary between mixolimnion and monimolimnion is a redox interface. At this interface, an important number of both chemical and biochemical reactions occur. This boundary, where element concentrations vary greatly, was studied at the centimeter scale between 58 and 64 m depth. The present paper is focused on five elements showing very different behaviour: rubidium, iron, manganese, vanadium and barium. Sodium was used as a reference element. Sodium and rubidium concentrations had similar patterns: a progressive increase began at 61 m depth and the maximal gradient was located at 63 m. They continue to increase towards the bottom of the lake. Iron concentrations were low (< 1 µmol/L) at a depth less than 62.8 m and increased very sharply below this depth. Manganes...

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“…Fe(III) oxides together with aqueous and solid-phase Fe(II) compounds are abundant components of many hydromorphic soils and aquatic sediments, and the redox cycling of Fe exerts a wide-ranging influence on the biogeochemistry of sedimentary environments where Fe is abundant (Ponnamperuma 1972;Lovley 1991;Davison 1993). Recent studies in both freshwater (Roden and Wetzel 1996) and marine (Canfield et al 1993;Thamdrup et al 1994;Hines et al 1997;Thamdrup 2000) habitats indicate that dissimilatory microbial Fe(III) oxide reduction contributes substantially to sediment carbon metabolism.…”

mentioning

confidence: 99%

“…Although a large body of knowledge exists on sedimentary Fe transformations and their environmental significance (e.g., Lovley 1991;Stumm and Sulzberger 1992;Davison 1993), detailed information on the in situ kinetics of many key processes is still not available. Understanding the kinetics of microbial Fe(III) oxide reduction is a prerequisite for modeling carbon and energy flux through sedimentary Fe cycling and the impact of Fe(III) oxide reduction on other electron-accepting processes (Thamdrup 2000), as well as for predicting the fate of inorganic and organic contaminants whose behavior is linked to Fe redox chemistry (Van Cappellen and Wang 1995).…”

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confidence: 99%

Kinetics of microbial Fe(III) oxide reduction in freshwater wetland sediments

Roden

Wetzel

2002

Limnology & Oceanography

158

112

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The kinetics of microbial amorphous Fe(III) oxide reduction was investigated in sediments from a freshwater wetland in north central Alabama, USA. Fe(III) oxide concentrations decreased exponentially with time during anaerobic incubation of sediment slurries and homogenized surface sediments. Rates of organic carbon mineralization (⌺CO 2 ϩ CH 4 accumulation) did not change markedly during the course of Fe(III) oxide reduction, which indicated that the exponential decline in Fe(III) oxide concentration over time resulted primarily from Fe(III) limitation rather than a decrease in organic matter decay rate. Initial rates of Fe(III) oxide reduction were linearly correlated with initial Fe(III) oxide concentrations in experiments with mixtures of Fe(III)-rich and Fe(III)-depleted sediment slurries. Similar results were obtained in experiments with sediment from various depth intervals in the upper 3 cm of freshly collected cores. These findings provide explicit evidence that microbial Fe(III) oxide reduction rates are first order with respect to amorphous Fe(III) oxide concentration in the wetland sediment. The observed first-order relationship between Fe(III) oxide concentration and reduction rate is consistent with established models of surface area-controlled mineral transformation. An experiment in which Fe(III) oxide-rich sediment slurries were amended with different amounts of labile organic matter demonstrated a direct correlation between first-order Fe(III) reduction rate constants and initial rates of organic carbon mineralization. These results provide empirical support for existing approaches to modeling organic matter decay-dependent Fe(III) oxide reduction kinetics in sediments.

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Iron and manganese in lakes

Cited by 759 publications

References 149 publications

Prevention of sulphide accumulation and phosphate mobilization by the addition of iron(II) chloride to a reduced sediment: an enclosure experiment

Prevention of sulphide accumulation and phosphate mobilization by the addition of iron(II) chloride to a reduced sediment: an enclosure experiment

Vitesses de réaction de dissolution et précipitation au voisinage de l'interface oxydo-réducteur dans un lac méromictique : le lac Pavin (Puy de Dôme, France)

Kinetics of microbial Fe(III) oxide reduction in freshwater wetland sediments

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