Skip to main content
Article thumbnail
Location of Repository

Interactions of molybdenum and vanadium with iron nanoparticles

By Loredana Brinza


Molybdenum, vanadium and iron are important micro and macro nutrients, respectively, for all living organisms. Their cycles and budgets in the natural environment is affected by - and affects many different processes.\ud \ud Poorly ordered ferrihydrite nanoparticles characterised for their particle size (3-5nm), crystallinity, surface area (~200m2g-1) and surface charge (point of zero charge =\ud 7.96) helped to understand better their adsorption and co-precipitation interactions mechanisms with molybdenum and vanadium.\ud \ud Comparative studies of molybdenum and vanadium adsorbed onto or coprecipitated with ferrihydrite as well as the influence of different conditions such us pH, metal concentration, particles concentration and matrix composition were carried out. The obtained kinetic parameters were modelled with various geochemical software packages to evaluate their behavior.\ud \ud Metastability of ferrihydrite under hydrothermal conditions was the second big theme of this thesis. The crystallisation kinetic (transformation rates) and thermodynamics (activation energies) of the hematite formation were assessd with in situ synchrotronbased\ud difraction tehnique in the presence and the absence of molybdenum and vanadium under conditions mimicing the geochemistry of deep sea hydrothermal systems (ionic\ud strength = 0.7, pH = 8). The data showed that hematite crystallization (from ferrihydrite) followed a temperature dependent trends and that the transformation requires an apparent activation energy of 26 kJmol-1 . The presence of molybdenum and vanadium delayed the transformation reaction by 32% and 38% respectively.\ud \ud The transformation also leads to the sequestration of more than 90% of the initial ferrihydrite associated molybdenum and vanadium in the hematite structure, making it thus\ud non-bioavailable for further reaction.\ud \ud Finally, synchrotron-based X-ray Absorption Spectroscopy revealed that the initial molybdate speciation in the starting ferrihydrite changes bonding and coordination in the end-product hematite and molybdenum replaced iron in the hematite structure further supporting the fact that molybdenum is immobilized in the hematite structure.\ud \u

Publisher: School of Earth and Environment (Leeds)
Year: 2010
OAI identifier:

Suggested articles


  1. (2009). A surface structural model for ferrihydrite II: Adsorption of uranyl and carbonate.
  2. (1938). Adsorption of gases in multimolecular layers.
  3. (1999). An evaluation of equilibrium and kinetic models for gold biosorption. Res. and Environ.
  4. (2002). Application of factorial designs and Doehlert matrix in optimization of experimental variables associated with the preconcentration and determination of vanadium and copper in seawater by inductively coupled plasma optical emission spectrometry.
  5. (1996). Aquatic chemistry: Chemical equilibria and rates in natural waters.
  6. (1997). Aqueous Environmental Geochemistry
  7. (2009). Arsenite adsorption on goethite at elevated temperatures.
  8. (2000). Bioavailability and bioaccumulation of iron in the sea,
  9. (2005). Biosorption of Cu (2+) ions from aqueous solution by-Enteromorpha sp.
  10. (1995). Biosorption of heavy metals.
  11. (1995). Chemical and biochemical transformation in hydrothermal plumes. Washington: American Geophysical Union.
  12. (1993). Comparative study of adsorption behavior of copper, lead, and zinc onto goethite in aqueous systems.
  13. (2006). Contributions from glacially-derived sediment to the global iron (oxyhydr)oxide cycle: Implications for iron delivery to the oceans.
  14. (2010). Crystallization of hematite (a-Fe2O3) under alkaline condition: the effects of Pb.
  15. (1998). Determination of Cu,
  16. (1986). Determination of molybdenum and vanadium in seawater by carbon furnace atomic-absorption spectrometry with metal chelate coprecipitation.
  17. (1977). Determination of Molybdenum in Seawater by Electron Paramagnetic Resonance Spectrometry.
  18. (2002). Determination of trace levels of dissolved vanadium in seawater by use of synthetic complexing agents and inductively coupled plasma-atomic emission spectroscopy (ICP-AES).
  19. (2001). Determination of trace metals in seawater by on-line column preconcentration inductively coupled plasma mass spectrometry. Analytica chimica acta 438(1-2):205-214.186 Hongshao
  20. (2008). Development of an analytical protocol for the determination of V (IV) and V (V) in seawater: Application to coastal environments.
  21. (2000). Dissolved and particulate Fe in a hydrothermal plume at 9°45*N, East Pacific Rise: Slow Fe (II) oxidation kinetics in Pacific plumes.
  22. (2003). Effect of cadmium (II) and anion type on the ageing of ferrihydrite and its subsequent leaching under neutral and alkaline conditions.
  23. (1983). Effect of pH on formation of goethite and hematite from ferrihydrite. Clays and Clay Minerals
  24. (2005). Elements of XAFS.
  25. (2008). Experimental study of Ni adsorption on chalk: preliminary results.
  26. (1995). EXSPLINE-a program for EXAFS background subtraction.
  27. (2008). F-s. A model for prediction of phase transformation during quenching of steel;
  28. (2007). Fe(II)-induced transformation from ferrihydrite to lepidocrocite and goethite.
  29. (1999). From Fe(III) ions to ferrihydrite and then to hematite.
  30. (2008). Fundamentals of XAFS.
  31. (1941). Granulation, Phase Change, and Microstructure Kinetics of Phase Change.
  32. (2008). Green rust as a precursor for magnetite: an in situ synchrotron based study.
  33. (1990). Heavy metals in the Marine Environments.
  34. (2002). Hydrothermal plume - particle fluxes at 13N on the East Pacific Rise. Deep-Sea Research I
  35. (1997). Hydrothermal scavenging on the Juan de185 Fuca Ridge: Evidence from ridge-flank sediments Geochimica Cosmochimica Acta
  36. (2003). Hydrous ferric oxide: evaluation of Cd–HFO surface complexation models combining CdK EXAFS data, potentiometric titration results, and surface site structures identified from mineralogical knowledge.
  37. (2005). Individual behaviour of selected heavy metals, Heavy metals in the environment: origin, interaction and remediation:
  38. (2006). Influence of Aluminum Doping on Ferrihydrite Nanoparticle Reactivity.
  39. (2006). Interactions of cadmium(II) and protons with dead biomass of marine algae Fucus sp.
  40. (1992). Introduction to mineral sciences:
  41. (2004). Iron oxide chemistry. From molecular clustters to extended solid networks.
  42. (2004). Kinetic modeling and equilibrium studies during cadmium biosorption by dead Sargassum sp. biomass.
  43. (1939). Kinetics of phase change. I General Theory.
  44. (1940). Kinetics of Phase Change. II Transformation-Time Relations for Random Distribution of Nuclei.
  45. (2003). Lead sorption onto ferrihydrite. 1. A macroscopic and spectroscopic assessment.
  46. (1990). Marine Geochemistry.
  47. (2000). Mastersizer 2000- Integrated systems for particle sizing.
  48. (2004). Mechanism of biosorption of different heavy metals by brown marine macroalgae. Biotechnology and bioengineering
  49. (1999). Metal oxide surface and their interaction with aqueous solutions and microbial organisms.
  50. (2003). Modelling molybdate and tungstate adsorption to ferrihydrite.
  51. (1969). Models of solid-state reactions in powder compacts: A review.
  52. (2008). Molecular pathways of silica nanoparticle formation and biosilicification.
  53. (2001). Molybdenum determination in iron matrices by ICP-AES after separation and preconcentration using polyurethane foam.
  54. (2010). Nanosized Iron Oxide Colloids Strongly Enhance Microbial Iron Reduction.
  55. (2001). Ni and Zn sorption to amorphous versus crystalline iron oxides : Macroscopic studies.
  56. (2009). Normalization, comparison, and scaling of adsorption data: arsenate and goethite.
  57. (1998). Occurrence and constitution of natural and synthetic ferrihydrite, a widespread iron oxyhydroxide.
  58. (2007). Origin Pro. Version 8.
  59. (1999). Oxygen isotope fractionation in ferric oxide-water systems: Low temperature synthesis.
  60. (2000). Performance optimization of a commercially available iminodiacetate resin for the determination of Mn, Ni, Cu, Cd and Pb by on-line preconcentration inductively coupled plasma-mass spectrometry.
  61. (1989). Pre-concentration of refractory elements for inductively coupled plasma atomic-fluorescence spectrometry. Analytical
  62. (1999). Precipitation of Fe(III) / oxyhydroxide deposits from shallowwater hydrothermal fluids in Tutum Bay, Ambitle Island,
  63. (2002). Predicting molybdenum adsorption by soils using soil chemical parameters in the constant capacitance model.
  64. (2004). Procedures of separation and preconcentration for molybdenum determination using atomic spectrometry—a review.
  65. (1997). Reconstructing the iron cycle from the horizontal distribution of metals in the sediment of Baldeggersee.
  66. (2005). Relationship between gold and arsenic in hydrothermal pyrite: experimental results and applications to submicroscopic gold in massive sulphide deposits. Leeds: The University of Leeds.
  67. (2009). Removal of phosphorus from solution using biogenic iron oxides.
  68. (1988). Role of amorphous ferric oxyhydroxide in removal of anthropogenic vanadium from seawater.
  69. (1989). Role of hydrothermal precipitates in the geochemical cycling of vanadium.
  70. (1994). Role of molybdenum at the iron oxides surface.
  71. (1988). Scavenging of vanadium by Iron Oxides in Hydrotermal Plumes.
  72. (2006). Solid-State Kinetic Models: Basics and Mathematical Fundamentals.
  73. (2004). Sorption and Biosorption.
  74. (1997). Sorption and desorption of molybdenum in alumina microspheres.
  75. Sorption of arsenate and dichromate on polymerin, Fe(OH)(x)-polymerin complex and ferrihydrite.
  76. (2000). Structure of synthetic 2-line ferrihydrite by electron nanodiffraction.
  77. (2002). Surface complexation and precipitate geometry for aqueous Zn(II) sorption on ferrihydrite I: X-ray absorption extended fine structure spectroscopy analysis.
  78. (1998). Surface Complexation Model for the Heavy Metal Adsorption on Natural Sediment.
  79. (2004). Surface complexation modeling of zinc sorption onto ferrihydrite.
  80. (1990). Surface Complexation Modeling: Hydrous Ferric Oxide:
  81. (2002). Surfer - Surface Mapping System. Version 8.01.
  82. (2000). Synchrotron studies of phase transformations.
  83. (2001). The Biogeochemistry of Iron in Seawater.
  84. (1916). The constitution and fundamental properties of solids and liquids.
  85. (2005). The effect of zinc sulfide on phase transformations of ferrihydrite.
  86. (2000). The ferrozine method revisited: Fe(II)/Fe(III) determination in natural waters.
  87. (2002). The Geochemist`s Workbench - A User`s Guide to Rxn, Act2, React, and Gtplot. Version Release 4.0.
  88. (2003). The Iron Oxides: Structure, Proprieties, Reactions, Occurances and Uses.
  89. (2005). The kinetics and mechanisms of goethite and hematite crystallization under alkaline conditions, and in the presence of phosphate.
  90. (2008). The kinetics and mechanisms of schwertmannite transformation to goethite and hematite under 2 alkaline conditions.
  91. (1956). The kinetics of grain boundary nucleated reactions.
  92. (2002). The low temperature geochemical cycle of iron: from continental fluxes to marine sediment deposition.
  93. (2006). The rate of ferrihydrite transformation to goethite via the Fe(II) pathway.
  94. (2000). The reactivity of iron.
  95. (1998). The relationship between P/Fe and V/Fe ratios in hydrothermal precipitaes and dissolved phosphate in seawater.
  96. (2007). The Structure of Ferrihydrite, a Nanocrystalline Material.
  97. (2008). The transformation of ferrihydrite in the presence of trace Fe(II): The effect of the anionic media.
  98. (2006). The transformation of ferrihydrite into goethite or hematite, revisited.
  99. (1996). The Zeta potential of iron and chromium hydrous oxides during adsorption and coprecipitation of aqueous heavy metals.
  100. (2000). Transmission electron microscopy of synthetic 2- and 6-line ferrihydrite.
  101. (2007). Vanadium removal by metal (hydr)oxide adsorbents.
  102. (1996). Wide angle X-ray scattering (WAXS) study of “two-line” ferrihydrite structure: Effect of arsenate sorption and counterion variation and comparison with EXAFS results.
  103. (2004). X-ray absorption spectroscopy and related techniques.

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.