GAC adsorption of intermittently loaded pesticides

The removal efficiency of intermittently applied pesticides by a granular activated carbon bed preloaded with background organic matter (BOM) was examined using the rapid small-scale column test. Preloading with BOM decreased the removal efficiency of the pesticides. The removal efficiency was a function of the amount of BOM adsorbed, but was unrelated to the influent concentration of the pesticide. A modeling approach employing the ideal adsorbed solution theory and a linear driving-force expression for intraparticle surface diffusion adequately simulated these phenomena.

[1]  M. McGuire,et al.  GAC adsorber design protocol for the removal of off-flavors , 1993 .

[2]  V. Snoeyink,et al.  Using isotherms to predict GAC's capacity for synthetic organics , 1992 .

[3]  George A. Sorial,et al.  Effect of molecular oxygen on the scaleup of GAC adsorbers , 1992 .

[4]  Walter J. Weber,et al.  Effects of background dissolved organic matter on TCE adsorption by GAC , 1992 .

[5]  T. Speth.  Evaluating capacities of GAC preloaded with natural water , 1991 .

[6]  R. Scott Summers,et al.  PREDICTING GAC PERFORMANCE WITH RAPID SMALL-SCALE COLUMN TESTS , 1991 .

[7]  Edward H. Smith,et al.  Evaluation of mass-transfer parameters for adsorption of organic compounds from complex organic matrixes , 1989 .

[8]  R. Summers,et al.  The Influence of Background Organic Matter on GAC Adsorption , 1989 .

[9]  Thomas F. Speth,et al.  Effect of Preloading on the Scale‐up of GAC Microcolumns , 1989 .

[10]  W. Weber,et al.  A microscale system for estimation of model parameters for fixed-bed adsorbers , 1987 .

[11]  H. Sontheimer,et al.  Kinetics of adsorption on activated carbon. III: Natural organic material , 1987 .

[12]  John C. Crittenden,et al.  Design of Rapid Fixed‐Bed Adsorption Tests for Nonconstant Diffusivities , 1987 .

[13]  J. Crittenden,et al.  Prediction of multicomponent adsorption equilibria using ideal adsorbed solution theory. , 1985, Environmental science & technology.

[14]  Vernon L. Snoeyink,et al.  Activated carbon adsorption of humic substances , 1981 .