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Title: Reduction of Hg(II) by Fe(II)-Bearing Smectite Clay Minerals

Abstract

Aluminosilicate clay minerals are often a major component of soils and sediments and many of these clays contain structural Fe (e.g., smectites and illites). Structural Fe(III) in smectite clays is redox active and can be reduced to Fe(II) by biotic and abiotic processes. Fe(II)-bearing minerals such as magnetite and green rust can reduce Hg(II) to Hg(0); however, the ability of other environmentally relevant Fe(II) phases, such as structural Fe(II) in smectite clays, to reduce Hg(II) is largely undetermined. We conducted experiments examining the potential for reduction of Hg(II) by smectite clay minerals containing 0–25 wt% Fe. Fe(III) in the clays (SYn-1 synthetic mica-montmorillonite, SWy-2 montmorillonite, NAu-1 and NAu-2 nontronite, and a nontronite from Cheney, Washington (CWN)) was reduced to Fe(II) using the citrate-bicarbonate-dithionite method. Experiments were initiated by adding 500 µM Hg(II) to reduced clay suspensions (4 g clay L–1) buffered at pH 7.2 in 20 mM 3-morpholinopropane-1-sulfonic acid (MOPS). The potential for Hg(II) reduction in the presence of chloride (0–10 mM) and at pH 5–9 was examined in the presence of reduced NAu-1. Analysis of the samples by Hg LIII-edge X-ray absorption fine structure (XAFS) spectroscopy indicated little to no reduction of Hg(II) by SYn-1 (0% Fe), while reductionmore » of Hg(II) to Hg(0) was observed in the presence of reduced SWy-2, NAu-1, NAu-2, and CWN (2.8–24.8% Fe). Hg(II) was reduced to Hg(0) by NAu-1 at all pH and chloride concentrations examined. These results suggest that Fe(II)-bearing smectite clays may contribute to Hg(II) reduction in suboxic/anoxic soils and sediments.« less

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [3]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States); Bulgarian Academy of Sciences, Sofia (Bulgaria)
  3. Argonne National Lab. (ANL), Argonne, IL (United States); California Institute of Technology (CalTech), Pasadena, CA (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; USDOE Office of Science (SC), Biological and Environmental Research (BER)
OSTI Identifier:
1727382
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Minerals
Additional Journal Information:
Journal Volume: 10; Journal Issue: 12; Journal ID: ISSN 2075-163X
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; elemental mercury; montmorillonite; nontronite; reduction

Citation Formats

O’Loughlin, Edward J., Boyanov, Maxim I., Kemner, Kenneth M., and Thalhammer, Korbinian O.. Reduction of Hg(II) by Fe(II)-Bearing Smectite Clay Minerals. United States: N. p., 2020. Web. https://doi.org/10.3390/min10121079.
O’Loughlin, Edward J., Boyanov, Maxim I., Kemner, Kenneth M., & Thalhammer, Korbinian O.. Reduction of Hg(II) by Fe(II)-Bearing Smectite Clay Minerals. United States. https://doi.org/10.3390/min10121079
O’Loughlin, Edward J., Boyanov, Maxim I., Kemner, Kenneth M., and Thalhammer, Korbinian O.. Tue . "Reduction of Hg(II) by Fe(II)-Bearing Smectite Clay Minerals". United States. https://doi.org/10.3390/min10121079. https://www.osti.gov/servlets/purl/1727382.
@article{osti_1727382,
title = {Reduction of Hg(II) by Fe(II)-Bearing Smectite Clay Minerals},
author = {O’Loughlin, Edward J. and Boyanov, Maxim I. and Kemner, Kenneth M. and Thalhammer, Korbinian O.},
abstractNote = {Aluminosilicate clay minerals are often a major component of soils and sediments and many of these clays contain structural Fe (e.g., smectites and illites). Structural Fe(III) in smectite clays is redox active and can be reduced to Fe(II) by biotic and abiotic processes. Fe(II)-bearing minerals such as magnetite and green rust can reduce Hg(II) to Hg(0); however, the ability of other environmentally relevant Fe(II) phases, such as structural Fe(II) in smectite clays, to reduce Hg(II) is largely undetermined. We conducted experiments examining the potential for reduction of Hg(II) by smectite clay minerals containing 0–25 wt% Fe. Fe(III) in the clays (SYn-1 synthetic mica-montmorillonite, SWy-2 montmorillonite, NAu-1 and NAu-2 nontronite, and a nontronite from Cheney, Washington (CWN)) was reduced to Fe(II) using the citrate-bicarbonate-dithionite method. Experiments were initiated by adding 500 µM Hg(II) to reduced clay suspensions (4 g clay L–1) buffered at pH 7.2 in 20 mM 3-morpholinopropane-1-sulfonic acid (MOPS). The potential for Hg(II) reduction in the presence of chloride (0–10 mM) and at pH 5–9 was examined in the presence of reduced NAu-1. Analysis of the samples by Hg LIII-edge X-ray absorption fine structure (XAFS) spectroscopy indicated little to no reduction of Hg(II) by SYn-1 (0% Fe), while reduction of Hg(II) to Hg(0) was observed in the presence of reduced SWy-2, NAu-1, NAu-2, and CWN (2.8–24.8% Fe). Hg(II) was reduced to Hg(0) by NAu-1 at all pH and chloride concentrations examined. These results suggest that Fe(II)-bearing smectite clays may contribute to Hg(II) reduction in suboxic/anoxic soils and sediments.},
doi = {10.3390/min10121079},
journal = {Minerals},
number = 12,
volume = 10,
place = {United States},
year = {2020},
month = {12}
}

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Works referenced in this record:

Transformation of Hematite into Magnetite During Dissimilatory Iron Reduction—Conditions and Mechanisms
journal, August 2007


Reductive Capacity of Natural Reductants
journal, February 2003

  • Lee, Woojin; Batchelor, Bill
  • Environmental Science & Technology, Vol. 37, Issue 3
  • DOI: 10.1021/es025830m

EXAFS study of mercury(II) sorption to Fe- and Al-(hydr)oxides
journal, February 2004

  • Kim, Christopher S.; Rytuba, James J.; Brown, Gordon E.
  • Journal of Colloid and Interface Science, Vol. 270, Issue 1
  • DOI: 10.1016/j.jcis.2003.07.029

Natural attenuation of TCE, As, Hg linked to the heterogeneous oxidation of Fe(II): an AFM study
journal, October 2002


Isolation of Phyllosilicate–Iron Redox Cycling Microorganisms from an Illite–Smectite Rich Hydromorphic Soil
journal, January 2012


Iron(II,III) Hydroxycarbonate Green Rust Formation and Stabilization from Lepidocrocite Bioreduction
journal, January 2002

  • Ona-Nguema, Georges; Abdelmoula, Mustapha; Jorand, Frédéric
  • Environmental Science & Technology, Vol. 36, Issue 1
  • DOI: 10.1021/es0020456

Abiotic Nitrate Reduction to Ammonium:  Key Role of Green Rust
journal, January 1996

  • Hansen, Hans Chr. B.; Koch, Christian B.; Nancke-Krogh, Hanne
  • Environmental Science & Technology, Vol. 30, Issue 6, p. 2053-2056
  • DOI: 10.1021/es950844w

Kinetics of Homogeneous and Surface-Catalyzed Mercury(II) Reduction by Iron(II)
journal, June 2013

  • Amirbahman, Aria; Kent, Douglas B.; Curtis, Gary P.
  • Environmental Science & Technology, Vol. 47, Issue 13
  • DOI: 10.1021/es401459p

Mackinawite (FeS) Reduces Mercury(II) under Sulfidic Conditions
journal, August 2014

  • Bone, Sharon E.; Bargar, John R.; Sposito, Garrison
  • Environmental Science & Technology, Vol. 48, Issue 18
  • DOI: 10.1021/es501514r

Cycling of mercury in the environment: Sources, fate, and human health implications: A review
journal, May 2017


U(VI) Reduction by Biogenic and Abiotic Hydroxycarbonate Green Rusts: Impacts on U(IV) Speciation and Stability Over Time
journal, March 2018

  • Yan, Sen; Boyanov, Maxim I.; Mishra, Bhoopesh
  • Environmental Science & Technology, Vol. 52, Issue 8
  • DOI: 10.1021/acs.est.7b06405

Preparation and Handling of Dithionite-Reduced Smectite Suspensions
journal, January 1984


A review on the distribution of Hg in the environment and its human health impacts
journal, April 2016


Elemental Mercury Evolution Mediated by Humic Acid
journal, May 1974


Iron phase transformations resulting from the respiration of Shewanella putrefaciens on a mixed mineral phase
journal, November 2009


Reduction of mercury (II) by humic substances—influence of pH, salinity of aquatic system
journal, March 2015

  • Chakraborty, Parthasarathi; Vudamala, Krushna; Coulibaly, Mariame
  • Environmental Science and Pollution Research, Vol. 22, Issue 14
  • DOI: 10.1007/s11356-015-4258-4

Near-edge x-ray-absorption fine structure of Pb: A comparison of theory and experiment
journal, June 1993


Selenite Reduction by Mackinawite, Magnetite and Siderite: XAS Characterization of Nanosized Redox Products
journal, March 2008

  • Scheinost, Andreas C.; Charlet, Laurent
  • Environmental Science & Technology, Vol. 42, Issue 6
  • DOI: 10.1021/es071573f

Adsorption of mercury from aqueous solution by nontronite, Aspergillus niger, and hybrid material
journal, May 2013

  • Guerra, Denis L.; Silva, Ricardo A. R.; Mello, Ivani
  • Water Quality Research Journal, Vol. 48, Issue 2
  • DOI: 10.2166/wqrjc.2013.018

Mercury reduction and complexation by natural organic matter in anoxic environments
journal, January 2011

  • Gu, B.; Bian, Y.; Miller, C. L.
  • Proceedings of the National Academy of Sciences, Vol. 108, Issue 4
  • DOI: 10.1073/pnas.1008747108

Reduction rate of neptunium(V) in heterogeneous solution with magnetite
journal, January 2004


Production of gaseous mercury in tropical hydromorphic soils in the presence of ferrous iron: a laboratory study: Production of gaseous mercury
journal, April 2005


Hexahydro-1,3,5-trinitro-1,3,5-triazine Transformation by Biologically Reduced Ferrihydrite:  Evolution of Fe Mineralogy, Surface Area, and Reaction Rates
journal, July 2005

  • Williams, Aaron G. B.; Gregory, Kelvin B.; Parkin, Gene F.
  • Environmental Science & Technology, Vol. 39, Issue 14
  • DOI: 10.1021/es0490525

Biogenic iron mineralization accompanying the dissimilatory reduction of hydrous ferric oxide by a groundwater bacterium
journal, October 1998

  • Fredrickson, James K.; Zachara, John M.; Kennedy, David W.
  • Geochimica et Cosmochimica Acta, Vol. 62, Issue 19-20
  • DOI: 10.1016/S0016-7037(98)00243-9

Reduction of AgI, AuIII, CuII, and HgII by FeII/FeIII hydroxysulfate green rust
journal, November 2003


Pu(V)O 2 + Adsorption and Reduction by Synthetic Magnetite (Fe 3 O 4 )
journal, November 2004

  • Powell, Brian A.; Fjeld, Robert A.; Kaplan, Daniel I.
  • Environmental Science & Technology, Vol. 38, Issue 22
  • DOI: 10.1021/es049386u

Respiration and Dissolution of Iron(III)-Containing Clay Minerals by Bacteria
journal, September 1999

  • Kostka, Joel E.; Haefele, Eberhard; Viehweger, Ralf
  • Environmental Science & Technology, Vol. 33, Issue 18
  • DOI: 10.1021/es990021x

Influence of Chloride and Fe(II) Content on the Reduction of Hg(II) by Magnetite
journal, April 2013

  • Pasakarnis, Timothy S.; Boyanov, Maxim I.; Kemner, Kenneth M.
  • Environmental Science & Technology, Vol. 47, Issue 13
  • DOI: 10.1021/es304761u

Adsorption of aqueous mercury (II) complexes at the oxide/water interface
journal, May 1974


Mercury adsorption on natural and organofunctionalized smectites - thermodynamics of cation removal
journal, January 2009

  • Guerra, Denis L.; Santos, Maria R. M. C.; Airoldi, Claudio
  • Journal of the Brazilian Chemical Society, Vol. 20, Issue 4
  • DOI: 10.1590/S0103-50532009000400003

Microbe-clay mineral interactions
journal, November 2009

  • Dong, H.; Jaisi, D. P.; Kim, J.
  • American Mineralogist, Vol. 94, Issue 11-12
  • DOI: 10.2138/am.2009.3246

Bacterial mercury resistance from atoms to ecosystems
journal, June 2003


Reduction of Hg(II) to Hg(0) by Biogenic Magnetite from two Magnetotactic Bacteria
journal, December 2017


Transformation of Chlorinated Aliphatic Compounds by Ferruginous Smectite
journal, February 2001

  • Cervini-Silva, Javiera; Larson, Richard A.; Wu, Jun
  • Environmental Science & Technology, Vol. 35, Issue 4
  • DOI: 10.1021/es0015592

Reduction of Polychlorinated Ethanes and Carbon Tetrachloride by Structural Fe(II) in Smectites
journal, June 2009

  • Neumann, Anke; Hofstetter, Thomas B.; Skarpeli-Liati, Marita
  • Environmental Science & Technology, Vol. 43, Issue 11
  • DOI: 10.1021/es9001967

Controls on Fe reduction and mineral formation by a subsurface bacterium
journal, April 2003


Production and Loss of Dissolved Gaseous Mercury in Coastal Seawater
journal, December 1997

  • Amyot, Marc; Gill, Gary A.; Morel, François M. M.
  • Environmental Science & Technology, Vol. 31, Issue 12
  • DOI: 10.1021/es9703685

Comparative study of the fixation of inorganic mercury on the principal clay minerals and the sediments of the Loire Estuary
journal, November 1978


Growth of Thermophilic and Hyperthermophilic Fe(III)-Reducing Microorganisms on a Ferruginous Smectite as the Sole Electron Acceptor
journal, November 2007

  • Kashefi, Kazem; Shelobolina, Evgenya S.; Elliott, W. Crawford
  • Applied and Environmental Microbiology, Vol. 74, Issue 1
  • DOI: 10.1128/AEM.01580-07

Environmental distribution and transformation of mercury compounds
journal, January 1996

  • Stein, Eric D.; Cohen, Yoram; Winer, Arthur M.
  • Critical Reviews in Environmental Science and Technology, Vol. 26, Issue 1
  • DOI: 10.1080/10643389609388485

Reactivity of Fe(II) Species Associated with Clay Minerals
journal, February 2003

  • Hofstetter, Thomas B.; Schwarzenbach, René P.; Haderlein, Stefan B.
  • Environmental Science & Technology, Vol. 37, Issue 3
  • DOI: 10.1021/es025955r

Anaerobic production of magnetite by a dissimilatory iron-reducing microorganism
journal, November 1987

  • Lovley, Derek R.; Stolz, John F.; Nord, Gordon L.
  • Nature, Vol. 330, Issue 6145
  • DOI: 10.1038/330252a0

Comparisons of structural iron reduction in smectites by bacteria and dithionite: II. A variable-temperature Mössbauer spectroscopic study of Garfield nontronite
journal, July 2009

  • Ribeiro, Fabiana R.; Fabris, José D.; Kostka, Joel E.
  • Pure and Applied Chemistry, Vol. 81, Issue 8
  • DOI: 10.1351/PAC-CON-08-11-16

A review of the effects of iron redox cycles on smectite properties
journal, February 2011


XAFS Investigation of the Interactions of U VI with Secondary Mineralization Products from the Bioreduction of Fe III Oxides
journal, March 2010

  • O’Loughlin, Edward J.; Kelly, Shelly D.; Kemner, Kenneth M.
  • Environmental Science & Technology, Vol. 44, Issue 5
  • DOI: 10.1021/es9027953

Sources and remediation for mercury contamination in aquatic systems—a literature review
journal, September 2004


Effects of Phosphate on Secondary Mineral Formation During the Bioreduction of Akaganeite (.β-FeOOH): Green Rust Versus Framboidal Magnetite
journal, July 2015


Mercury transformation and release differs with depth and time in a contaminated riparian soil during simulated flooding
journal, March 2016

  • Poulin, Brett A.; Aiken, George R.; Nagy, Kathryn L.
  • Geochimica et Cosmochimica Acta, Vol. 176
  • DOI: 10.1016/j.gca.2015.12.024

Ferrous hydroxy carbonate is a stable transformation product of biogenic magnetite
journal, February 2005


Kinetics and Products of Chromium(VI) Reduction by Iron(II/III)-Bearing Clay Minerals
journal, August 2017

  • Joe-Wong, Claresta; Brown, Gordon E.; Maher, Kate
  • Environmental Science & Technology, Vol. 51, Issue 17
  • DOI: 10.1021/acs.est.7b02934

Redox Properties of Structural Fe in Clay Minerals. 1. Electrochemical Quantification of Electron-Donating and -Accepting Capacities of Smectites
journal, August 2012

  • Gorski, Christopher A.; Aeschbacher, Michael; Soltermann, Daniela
  • Environmental Science & Technology, Vol. 46, Issue 17
  • DOI: 10.1021/es3020138

Redox zones of a landfill leachate pollution plume (Vejen, Denmark)
journal, September 1992


Influence of chloride ions on the reduction of mercury species in the presence of dissolved organic matter
journal, May 2018

  • Lee, Seyong; Roh, Younghee; Kim, Kyoung-Woong
  • Environmental Geochemistry and Health, Vol. 41, Issue 1
  • DOI: 10.1007/s10653-018-0121-0

Review: evaporation of mercury from soils. An integration and synthesis of current knowledge
journal, January 2000


Novel Reduction of Mercury(II) by Mercury-Sensitive Dissimilatory Metal Reducing Bacteria
journal, November 2006

  • Wiatrowski, Heather A.; Ward, Paula Marie; Barkay, Tamar
  • Environmental Science & Technology, Vol. 40, Issue 21
  • DOI: 10.1021/es061046g

Influence of biogenic Fe(II) on the extent of microbial reduction of Fe(III) in clay minerals nontronite, illite, and chlorite
journal, March 2007

  • Jaisi, Deb P.; Dong, Hailiang; Liu, Chongxuan
  • Geochimica et Cosmochimica Acta, Vol. 71, Issue 5
  • DOI: 10.1016/j.gca.2006.11.027

Reduction of Hg(II) to Hg(0) by Magnetite
journal, July 2009

  • Wiatrowski, Heather A.; Das, Soumya; Kukkadapu, Ravi
  • Environmental Science & Technology, Vol. 43, Issue 14
  • DOI: 10.1021/es9003608

Binding of Hg II to High-Affinity Sites on Bacteria Inhibits Reduction to Hg 0 by Mixed Fe II/III Phases
journal, November 2011

  • Mishra, Bhoopesh; O’Loughlin, Edward J.; Boyanov, Maxim I.
  • Environmental Science & Technology, Vol. 45, Issue 22
  • DOI: 10.1021/es201820c

Reactivity of Fe(II)-Bearing Minerals toward Reductive Transformation of Organic Contaminants
journal, February 2004

  • Elsner, Martin; Schwarzenbach, René P.; Haderlein, Stefan B.
  • Environmental Science & Technology, Vol. 38, Issue 3
  • DOI: 10.1021/es0345569

Methylmercury Exposure and Health Effects in Humans: A Worldwide Concern
journal, February 2007


The anaerobic degradation of organic matter in Danish coastal sediments: Iron reduction, manganese reduction, and sulfate reduction
journal, August 1993


Mercury Reduction and Cell-Surface Adsorption by Geobacter sulfurreducens PCA
journal, September 2013

  • Hu, Haiyan; Lin, Hui; Zheng, Wang
  • Environmental Science & Technology, Vol. 47, Issue 19
  • DOI: 10.1021/es400527m

Global Biogeochemical Cycling of Mercury: A Review
journal, November 2009


Reduction of Hexavalent Chromium by Amorphous Iron Sulfide
journal, July 1997

  • Patterson, Ronald R.; Fendorf, Scott; Fendorf, Mark
  • Environmental Science & Technology, Vol. 31, Issue 7
  • DOI: 10.1021/es960836v

Reduction of ionic species by fulvic acid
journal, February 1981

  • Skogerboe, R. K.; Wilson, S. A.
  • Analytical Chemistry, Vol. 53, Issue 2
  • DOI: 10.1021/ac00225a023

Fe(II) Interactions with Smectites: Temporal Changes in Redox Reactivity and the Formation of Green Rust
journal, October 2017

  • Jones, Adele M.; Murphy, Cassandra A.; Waite, T. David
  • Environmental Science & Technology, Vol. 51, Issue 21
  • DOI: 10.1021/acs.est.7b01793

Adsorption of Mercury(II) by Soil: Effects of pH, Chloride, and Organic Matter
journal, January 1996


Effects of Complexing on the Homogeneous Reduction of Mercuric Salts in Aqueous Solution by Molecular Hydrogen
journal, October 1956

  • Korinek, G. J.; Halpern, J.
  • Canadian Journal of Chemistry, Vol. 34, Issue 10
  • DOI: 10.1139/v56-176

Sunlight-Induced Formation of Dissolved Gaseous Mercury in Lake Waters
journal, December 1994

  • Amyot, Marc.; McQueen, Donald J.; Mierle, Greg.
  • Environmental Science & Technology, Vol. 28, Issue 13
  • DOI: 10.1021/es00062a022

Iron(III)-Bearing Clay Minerals Enhance Bioreduction of Nitrobenzene by Shewanella putrefaciens CN32
journal, January 2015

  • Luan, Fubo; Liu, Yan; Griffin, Aron M.
  • Environmental Science & Technology, Vol. 49, Issue 3
  • DOI: 10.1021/es504149y

Mercury adsorption by montmorillonite and vermiculite: a combined XRD, TG-MS, and EXAFS study
journal, January 2005


Role of structural Fe in nontronite NAu-1 and dissolved Fe(II) in redox transformations of arsenic and antimony
journal, October 2012

  • Ilgen, Anastasia G.; Foster, Andrea L.; Trainor, Thomas P.
  • Geochimica et Cosmochimica Acta, Vol. 94
  • DOI: 10.1016/j.gca.2012.07.007

Reduction of Uranium(VI) by Mixed Iron(II)/Iron(III) Hydroxide (Green Rust):  Formation of UO 2 Nanoparticles
journal, February 2003

  • O'Loughlin, Edward J.; Kelly, Shelly D.; Cook, Russell E.
  • Environmental Science & Technology, Vol. 37, Issue 4
  • DOI: 10.1021/es0208409

Ecological effects, transport, and fate of mercury: a general review
journal, June 2000


The Chemical Cycle and Bioaccumulation of Mercury
journal, November 1998


BIOGEOCHEMICAL AND ENVIRONMENTAL FACTORS IN Fe BIOMINERALIZATION: MAGNETITE AND SIDERITE FORMATION
journal, February 2003


Influence of humic acid on adsorption of Hg(II) by vermiculite
journal, October 2014


Abiotic reduction of mercury by humic substances in aquatic system — an important process for the mercury cycle
journal, April 1991

  • Allard, B.; Arsenie, I.
  • Water Air & Soil Pollution, Vol. 56, Issue 1
  • DOI: 10.1007/BF00342291

Abiotic Degradation of Chlorinated Solvents by Clay Minerals and Fe(II): Evidence for Reactive Mineral Intermediates
journal, November 2019

  • Entwistle, James; Latta, Drew E.; Scherer, Michelle M.
  • Environmental Science & Technology, Vol. 53, Issue 24
  • DOI: 10.1021/acs.est.9b04665

Hg(II) reduction by siderite (FeCO3)
journal, March 2017


Reduction of Pertechnetate in Solution by Heterogeneous Electron Transfer from Fe(II)-Containing Geological Material
journal, January 1996

  • Cui, Daqing; Eriksen, Trygve E.
  • Environmental Science & Technology, Vol. 30, Issue 7
  • DOI: 10.1021/es950627v

Processes influencing the emission of mercury from soils: A conceptual model
journal, September 1999

  • Zhang, H.; Lindberg, S. E.
  • Journal of Geophysical Research: Atmospheres, Vol. 104, Issue D17
  • DOI: 10.1029/1999JD900194

Iron and Manganese in Anaerobic Respiration: Environmental Significance, Physiology, and Regulation
journal, October 1994


Bioreduction of Fe-bearing clay minerals and their reactivity toward pertechnetate (Tc-99)
journal, September 2011

  • Bishop, Michael E.; Dong, Hailiang; Kukkadapu, Ravi K.
  • Geochimica et Cosmochimica Acta, Vol. 75, Issue 18
  • DOI: 10.1016/j.gca.2011.06.034

Characterization of Predominant Reductants in an Anaerobic Leachate-Contaminated Aquifer by Nitroaromatic Probe Compounds
journal, January 1998

  • Rügge, Kirsten; Hofstetter, Thomas B.; Haderlein, Stefan B.
  • Environmental Science & Technology, Vol. 32, Issue 1
  • DOI: 10.1021/es970249p

Reduction and immobilization of hexavalent chromium by microbially reduced Fe-bearing clay minerals
journal, May 2014


Reduction and Oxidation of Fe3+ in Dioctahedral Smectites—1: Reduction with Hydrazine and Dithionite
journal, January 1976


Reduction and Oxidation of Fe3+ in Dioctahedral Smectites—2: Reduction with Sodium Sulphide Solutions
journal, January 1976


Electron Donor Utilization and Secondary Mineral Formation during the Bioreduction of Lepidocrocite by Shewanella putrefaciens CN32
journal, July 2019

  • O’Loughlin, Edward J.; Gorski, Christopher A.; Flynn, Theodore M.
  • Minerals, Vol. 9, Issue 7
  • DOI: 10.3390/min9070434

Effect of salinity and temperature on the adsorption of Hg(II) from aqueous solutions by a Ca‐montmorillonite
journal, January 2009


Chemical influences on trace metal-sulfide interactions in anoxic sediments
journal, October 1999


Effects of sorption on the biodegradation of 2-methylpyridine in aqueous suspensions of reference clay minerals
journal, September 2000

  • O'Loughlin, Edward J.; Traina, Samuel J.; Sims, Gerald K.
  • Environmental Toxicology and Chemistry, Vol. 19, Issue 9
  • DOI: 10.1002/etc.5620190904

Influence of soil redox state on mercury sorption and reduction capacity
journal, March 2020