Early diagenetic vivianite [Fe3(PO4)2·8H2O] in a contaminated freshwater sediment and insights into zinc uptake: A μ-EXAFS, μ-XANES and Raman study

Taylor, Kevin G.; Hudson‐Edwards, Karen A.; Bennett, Andrew J.; Vishnyakov, Vladimir

doi:10.1016/j.apgeochem.2008.01.009

Cited by 38 publications

(22 citation statements)

References 32 publications

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“…Sensitivity calculation with addition of soil solutes such as DOC (10 mM), Cl − , SO 4 2− (2 mM), and metal cations (Ca 2+ , Mg 2+ , K + and Na + ; 1–5 mM) did not make substantial changes to these results. Hence, precipitation of vivianite may have taken place and may offer an explanation to the high S max seen for the anoxic nonacid soils with the higher solution concentrations of P i and Fe II Vivianite has been observed in wetland soils (Postma, 1981), but more often it has been encountered in lake, river, and canal sediments (Dodd et al, 2003; Manning et al, 1991; Taylor et al, 2008). Precipitation of vivianite has recently also been observed in column studies using microbial reduction of P‐saturated ferrihydrite‐coated sand (Borch et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

A Comparative Study of Phosphate Sorption in Lowland Soils under Oxic and Anoxic Conditions

et al. 2010

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Phosphate (P(i)) release due to Fe(III) oxide dissolution is well documented for soils undergoing reduction. The P(i) sorption properties of soils in anoxic conditions are, however, still under consideration. In this investigation, P(i) sorption to strictly anoxic soils was compared with oxic conditions to assess the potential of lowland soils to function as traps for P(i) when flooded with drainage water. Batch sorption experiments were performed on seven minerogenic soils. Sorption to the anoxic soils was conducted after anoxic incubation, resulting in reduction of 36 to 93% of the dithionite-extractable Fe(III) (Fe(BD)). Langmuir fitted P(i) sorption isotherms showed a P(i) release of up to 1.1 mmol kg(-1) in six soils when P(i) concentrations in the matrix (P(sol)) were lower than 10 microM. Phosphate desorption was attributed to dissolution of amorphous iron oxides, and higher pH under anoxic conditions. The point of zero net sorption (EPC(0)) increased 2- to 10-fold on reduction. Five soils showed higher P(i) sorption capacities in the anoxic than in the oxic state at higher P(sol) concentrations. Solubility calculations indicated that precipitation of vivianite or similar Fe(II) phosphates may have caused the higher sorption capacities. Use of maximum sorption capacity (S(max)) is therefore misleading as a measure of P(i) sorption at low P(sol) concentrations. The results demonstrate that none of the strongly anoxic soils, irrespective of the initial Fe(III) oxide content, the P saturation, and the degree of Fe(III) oxide reduction, could retain P(i) at natural P(sol) concentrations in agricultural drainage water.

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Section: Discussionmentioning

confidence: 99%

A Comparative Study of Phosphate Sorption in Lowland Soils under Oxic and Anoxic Conditions

et al. 2010

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“…The limited studies of the diagenesis of urban sediments have shown the iron phosphate mineral vivianite (Fe 3 (PO 4 ) 2 ·8H 2 O) to be the most common mineral (Dodd et al 2003, Taylor andBoult 2007). The importance of these minerals for contaminant mobility is that metals can be taken up by these minerals as they precipitate, thereby locking up contaminants in the sediment (Large et al 2002;Taylor et al 2008b).…”

Section: Urban Canals and Docksmentioning

confidence: 97%

Sediments in urban river basins: a review of sediment–contaminant dynamics in an environmental system conditioned by human activities

2009

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Background, aim and scope Over 50% of the global population live in urban centres and, therefore, an understanding of the processes acting upon urban systems is a global issue. The nature of human-made, often impervious, land surfaces and heavily engineered waterways results in hydrological and sedimentological systems in urbanised basins which contrast significantly to those within more natural (i.e. pristine, forested, agricultural) aquatic systems. In addition, the abundance of contamination sources in urban systems results in chemical pressures often manifested as high pollution concentrations or loadings, which in turn have detrimental impacts on human and ecosystem health. These lead to management and sustainability issues not generally encountered in more natural environments. The purpose of this review is to provide a state-of-the-art assessment of sediment sources, pathways and storage within urban river systems, to consider sediment management within urban systems and river basins, and examine the role of local and global environmental changes on sediment processes and management. Inevitably, much of the sediment that is transported within urbanised basins is contaminated, so this review also considers sedimentcontaminant sources and interactions. Conclusions and recommendationsWe reach a number of conclusions and recommendations for future research. There is a need for better sampling and monitoring of sediment and sediment-associated contaminant fluxes and cycling in urban river channels and basins. This should include better techniques and studies to identify sources and transfers of road-deposited sediment (RDS), airborne particulate matter and sediments in the river system. Greater interdisciplinary research, combining sedimentologists, hydrologists, urban planners, urban archaeologists, chemists and biologists, is needed. More attention needs to focus on upscaling and connecting urban areas to the rest of the river basin, both upstream and downstream. Finally, there is a need to balance multiple needs (urban population, water resources) with likely trends in both urban development and global environmental change.Keywords Contaminants . River basin . Sediment . Sediment management . Urban . Urbanisation Background, aim and scopeAt the time of writing, over 50% of the global population live in urban centres, with this value set to increase (UNFPA 2007). Thus, for example, about 80% of the UK population live in conurbations, and even in a large, relatively unpopulated country such as Canada about 70% of the population live in urban areas. In addition, the number of 'mega-cities' (those cities with a population of greater than 10 million) is also increasing, particularly in the developing world: China, India and South America. Therefore, an understanding of the processes acting upon

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“…The presence of vivianite aggregates in association with organic matter or organic-rich deposits has been reported by numerous authors (Mackereth, 1966;Kjensmo, 1968;Rosenqvist, 1970;Postma, 1981;Peretyazhko and Sposito, 2005;Taylor et al, 2008), suggesting a crucial function of this organic material for the formation of crystal aggregates. The gel-like pore structure of a sediment matrix rich in organic matter, in combination with an intensified release of SRP and Fe 2+ due to microbial activity, may serve as necessary prerequisite for vivianite formation in sediments.…”

Section: Processes Influencing Vivianite Formationmentioning

confidence: 99%

“…However, direct evidence of vivianite in recent sediments (e.g. Nembrini et al, 1983;Hearn et al, 1983;Manning et al, 1991;Taylor et al, 2008;Nanzyo et al, 2013) appears to be scarce. Often the claim of vivianite findings is solely based upon indirect measures, such as equilibrium calculations, sequential P extractions, or electron microprobe analysis lacking direct identification.…”

Section: Introductionmentioning

confidence: 99%

Evidence for vivianite formation and its contribution to long-term phosphorus retention in a recent lake sediment: a novel analytical approach

et al. 2014

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Abstract. Vivianite, Fe 3 (PO 4 ) 2 · 8H 2 O, is a ferrous iron phosphate mineral which forms in waterlogged soils and sediments. The phosphorus (P) bound in its crystal lattice is considered to be immobilised because vivianite is stable under anoxic, reducing, sedimentary conditions. Thus, vivianite formation can make a major contribution to P retention during early diagenesis. Much remains unknown about vivianite in sediments, because technical challenges have rendered direct identification and quantification difficult. To identify vivianite and assess its significance for P burial during early diagenesis we studied the consequences of a 1992/1993 in-lake application of FeCl 3 and Fe(OH) 3 aimed at restoring Lake Groß-Glienicke (Berlin, Germany). In a novel approach, we firstly applied a heavy-liquid separation to the iron-rich surface sediments which allowed direct identification of vivianite by X-ray diffraction in the high-density (ρ > 2.3 g cm −3 ) sediment fraction. Secondly, we assessed the contribution of vivianite to P retention, combining results from chemical digestion with magnetic susceptibility data derived from magnetic hysteresis measurements. Scanning electron microscopy revealed that the dark blue spherical vivianite nodules were 40-180 µm in diameter, and formed of platy-and needle-shaped crystal aggregates. Although equilibrium calculations indicated supersaturation of vivianite throughout the upper 30 cm of the sediment, the vivianite deposits were homogeneously distributed within, and restricted to, the upper 23 cm only. Thus, supersaturated pore water alone cannot serve as a reliable predictor for the in situ formation of vivianite. In Lake Groß-Glienicke, vivianite formation continues to be triggered by the artificial iron amendment more than 20 yr ago, significantly contributing to P retention in surface sediments.

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Early diagenetic vivianite [Fe3(PO4)2·8H2O] in a contaminated freshwater sediment and insights into zinc uptake: A μ-EXAFS, μ-XANES and Raman study

Cited by 38 publications

References 32 publications

A Comparative Study of Phosphate Sorption in Lowland Soils under Oxic and Anoxic Conditions

A Comparative Study of Phosphate Sorption in Lowland Soils under Oxic and Anoxic Conditions

Sediments in urban river basins: a review of sediment–contaminant dynamics in an environmental system conditioned by human activities

Evidence for vivianite formation and its contribution to long-term phosphorus retention in a recent lake sediment: a novel analytical approach

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