Effect of Organic Matter on Sorption of Zn on Soil: Elucidation by Wien Effect Measurements and EXAFS Spectroscopy.

Soil organic matter (SOM) is the major factor affecting sequestration of heavy metals in soil. The mean free binding energy and the mean free adsorption energy and speciation of Zn in soil, as affected by SOM, were determined by employing Wien effect measurements. The presence of SOM markedly decreased the Zn binding energy in soils in the following order: Top (5.86 kJ mol(-1)) < Bottom (8.66 kJ mol(-1)) < Top OM-free (9.44 kJ mol(-1)) ≈ Bottom OM-free (9.50 kJ mol(-1)). The SOM also significantly decreased the adsorption energy of Zn on black soil particles by reducing nonspecific adsorption of Zn on their surfaces. The speciation of Zn in soils was elucidated by extended X-ray absorption fine structure spectroscopy and microfocus X-ray fluorescence. The results obtained by linear combination fitting of EXAFS spectra revealed that the main forms of Zn in soil were outer-sphere Zn, Zn-illite, Zn-kaolinite, and HA-Zn. As the SOM content increased, the proportion of HA-Zn among the total immobilized Zn increased, and the proportion of nonspecific adsorbed Zn decreased. The present results implied that SOM is an important controlling factor for the environmental behavior of Zn in soils.

[1]  S. Friedman,et al.  Effects of Soil Organic Matter on Sorption of Metal Ions on Soil Clay Particles , 2015 .

[2]  P. Nico,et al.  Chapter One - Mineral–Organic Associations: Formation, Properties, and Relevance in Soil Environments , 2015 .

[3]  B. Jansen,et al.  The Role of Dissolved Organic Matter in Adsorbing Heavy Metals in Clay‐Rich Soils , 2014 .

[4]  S. Friedman,et al.  Wien Effect in Suspensions and Its Application in Soil Science: A Review , 2013 .

[5]  Dong-mei Zhou,et al.  Exploring the effect of organic matter on the interactions between mineral particles and cations with Wien effect measurements , 2013, Journal of Soils and Sediments.

[6]  D. Sparks,et al.  Speciation and release kinetics of zinc in contaminated paddy soils. , 2012, Environmental science & technology.

[7]  Jun Hu,et al.  Determination of Ni(II) uptake mechanisms on mordenite surfaces: A combined macroscopic and microscopic approach , 2011 .

[8]  S. Cabaniss.  Forward modeling of metal complexation by NOM: II. prediction of binding site properties. , 2011, Environmental science & technology.

[9]  Andreas C Scheinost,et al.  Time-dependent changes of zinc speciation in four soils contaminated with zincite or sphalerite. , 2011, Environmental science & technology.

[10]  Dong-mei Zhou,et al.  Binding energies of monovalent anions with Fe/Al oxides based on ion activity and suspension Wien effect methods , 2010 .

[11]  Shen-qiang Wang,et al.  Adsorption kinetics of glyphosate and copper(II) alone and together on two types of soils. , 2009 .

[12]  Jun Jiang,et al.  Wien Effect Characterization of Interactions Between Ions and Charged Sites on Clay Surfaces of Variable-Charge Soils , 2009 .

[13]  A. Voegelin,et al.  Soil Properties Controlling Zn Speciation and Fractionation in Contaminated Soils , 2009 .

[14]  Jun Jiang,et al.  Negative Wien Effect Measurements for Exploring Polarization Processes of Cations Interacting with Negatively Charged Soil Particles , 2009 .

[15]  Olivier Jacquat,et al.  Formation of Zn-rich phyllosilicate, Zn-layered double hydroxide and hydrozincite in contaminated calcareous soils , 2008 .

[16]  S. Friedman,et al.  Wien Effect Determination of Adsorption Energies between Heavy Metal Ions and Soil Particles , 2008 .

[17]  F. Han.  Biogeochemistry of Trace Elements in Arid Environments , 2007 .

[18]  F. Han,et al.  Binding And Distribution Of Trace Elements Among Solid-Phase Components In Arid Zone Soils , 2007 .

[19]  S. Friedman,et al.  A new method to estimate adsorption energies between cations and soil particles via wien effect measurements in dilute suspensions and an approximate conductivity-activity analogy. , 2005, Environmental science & technology.

[20]  C. Carranca,et al.  Effect of Dissolved Organic Matter on Copper - Zinc Competitive Adsorption by a Sandy Soil at Different pH Values , 2005, Environmental technology.

[21]  C. Fraga,et al.  Relevance, essentiality and toxicity of trace elements in human health. , 2005, Molecular aspects of medicine.

[22]  M Newville,et al.  ATHENA, ARTEMIS, HEPHAESTUS: data analysis for X-ray absorption spectroscopy using IFEFFIT. , 2005, Journal of synchrotron radiation.

[23]  Nicolas Geoffroy,et al.  Zn speciation in the organic horizon of a contaminated soil by micro-X-ray fluorescence, micro- and powder-EXAFS spectroscopy, and isotopic dilution. , 2004, Environmental science & technology.

[24]  G. S. Sekhon,et al.  Effect of clay, organic matter and CaCO3 content on zinc adsorption by soils , 1977, Plant and Soil.

[25]  S. Friedman,et al.  An apparatus for measuring the Wien effect in suspensions , 2003 .

[26]  M. Benedetti,et al.  Occurrence of Zn/Al hydrotalcite in smelter-impacted soils from northern France: Evidence from EXAFS spectroscopy and chemical extractions , 2003 .

[27]  Ruben Kretzschmar,et al.  Combining selective sequential extractions, X-ray absorption spectroscopy, and principal component analysis for quantitative zinc speciation in soil. , 2002, Environmental science & technology.

[28]  Stephen Lofts,et al.  Complexation with dissolved organic matter and solubility control of heavy metals in a sandy soil. , 2002, Environmental science & technology.

[29]  J. Hazemann,et al.  Adsorption mechanisms of Zn on hectorite as a function of time, pH, and ionic strength , 2001 .

[30]  S D Pandey,et al.  Stability constants of metal-humic acid complexes and its role in environmental detoxification. , 2000, Ecotoxicology and environmental safety.

[31]  J. Baldock,et al.  Soil organic matter , 2000 .

[32]  B. Ling,et al.  STUDIES ON CHARACTERISTICS OF COMPLEXATION OF Cd AND Zn WITH HUMIC ACIDS , 2000 .

[33]  H. Selim,et al.  Kinetics of Zn sorption-desorption using a thin disk flow method , 1999 .

[34]  S. Sauvé,et al.  Soil solution speciation of lead(II): effects of organic matter and pH , 1998 .

[35]  M. Oliver.  Soil and human health: a review , 1997 .

[36]  T. Yu.  Chemistry of Variable Charge Soils , 1997 .

[37]  D. Sparks.  Environmental Soil Chemistry , 1995 .

[38]  Edmund R. Malinowski,et al.  Theory of error for target factor analysis with applications to mass spectrometry and nuclear magnetic resonance spectrometry , 1978 .

[39]  L. M. Shuman.  The Effect of Soil Properties on Zinc Adsorption by Soils 1 , 1975 .

[40]  M. Schnitzer,et al.  Oxygen-Containing Functional Groups in the Organic Matter of a Podzol Soil , 1959, Nature.

[41]  S. A. Barber,et al.  CHELATING ABILITY OF SOIL ORGANIC MATTER , 1957 .

[42]  J. M. Bremner,et al.  Studies on soil organic matter: Part II. The extraction of organic matter from soil by neutral reagents , 1949, The Journal of Agricultural Science.