Reduced adsorption of caesium on clay minerals caused by various humic substances

Abstract The effect of the addition of various humic substances on the adsorption of caesium on two mineral clays has been studied. All measurements were carried out in dilute suspension under controlled conditions of temperature and ionic strength. Only a small proportion of the humic substance was adsorbed on the clays (

[1]  K. Bunzl,et al.  Distribution coefficients of137Cs and85Sr by mixtures of clay and humic material , 1985 .

[2]  E. Thurman,et al.  Molecular size of aquatic humic substances , 1982 .

[3]  F. Livens,et al.  Factors affecting the sorption and fixation of caesium in acid organic soil , 1996 .

[4]  F. Livens,et al.  Total caesium-fixing potentials of acid organic soils , 1995 .

[5]  M. Frissel,et al.  Influence of pH, soil type and soil organic matter content on soil-to-plant transfer of radiocesium and -strontium as analyzed by a nonparametric method , 1992 .

[6]  R. M. Cornell.  Adsorption of cesium on minerals: A review , 1993 .

[7]  K. Hayes,et al.  Geochemical processes at mineral surfaces , 1987 .

[8]  S. Staunton,et al.  Adsorption of 137Cs on Montmorillonite and Illite: Effect of Charge Compensating Cation, Ionic Strength, Concentration of Cs, K and Fulvic Acid , 1997 .

[9]  B. L. Sawhney,et al.  Selective Sorption and Fixation of Cations by Clay Minerals: A Review , 1972 .

[10]  Claire Jouany,et al.  Surface Free Energy Components of Clay-Synthetic Humic Acid Complexes from Contact-Angle Measurements , 1991 .

[11]  B. Gu,et al.  The Microstructure of Dilute Clay and Humic Acid Suspensions Revealed by Freeze-Fracture Electron Microscopy , 1992 .

[12]  A. R. Fraser,et al.  The effect of removal of soil organic matter and iron on the adsorption of radiocaesium , 1997 .

[13]  J. Harsh,et al.  Hard and Soft Acid-Base Model Verified for Monovalent Cation Selectivity , 1990 .

[14]  A. Maes,et al.  Highly selective ion exchange in clay minerals and zeolites , 1985 .

[15]  I. Pulford,et al.  Caesium sorption—desorption in clay—humic acid systems , 1992 .

[16]  A. Maes,et al.  Cesium ion equilibria in illite clay , 1982 .