The Relationships Among Particle Size, Composition, and Partitioning Phenomena in Aqueous Systems

EPA Grant Number: R825398
Title: The Relationships Among Particle Size, Composition, and Partitioning Phenomena in Aqueous Systems
Investigators: Macalady, Donald L. , Bunge, Annette , Ranville, James
Current Investigators: Macalady, Donald L.
Institution: Colorado School of Mines
EPA Project Officer: Hiscock, Michael
Project Period: December 15, 1996 through December 14, 1999 (Extended to December 14, 2000)
Project Amount: $374,300
RFA: Exploratory Research - Water Chemistry and Physics (1996) RFA Text |  Recipients Lists
Research Category: Water , Land and Waste Management , Engineering and Environmental Chemistry


The purpose of this project is to provide a sound scientific basis and an improved computational model for the prediction of the effects of aquatic particles on the fate and transport of anthropogenic chemicals in aquatic systems. The key elements in the research are investigations of variations in the composition of natural organic matter (NOM) and concomitant effects on the partitioning of contaminant organic chemicals as a function of particle size. New, resolution, size-fractionation techniques applied to soil and sediment particles in colloidal and larger size ranges will enable isolation of precisely-defined size fractions. The size fractions, and in particular the associated NOM component, will be extensively characterized. Equilibrium partitioning experiments for a selected group of chemicals will be performed on each size fraction and related to the characteristics of the fractions.

Publications and Presentations:

Publications have been submitted on this project: View all 13 publications for this project

Supplemental Keywords:

environmental chemistry, water, Colorado, CO, region 8, analytical., Scientific Discipline, Waste, Water, Geographic Area, Ecosystem Protection/Environmental Exposure & Risk, Contaminated Sediments, Physics, Environmental Chemistry, State, Chemistry, Fate & Transport, Monitoring/Modeling, EPA Region, fate and transport, particle size, aquatic ecosystem, computational model, chemical characteristics, particulate, contaminated sediment, Region 8, equilibrium partitioning, organic contaminants, partitioning phenomena

Progress and Final Reports:

  • 1997
  • 1998
  • 1999
  • Final Report