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James Ranville

Professor, Department of Chemistry

James RanvillePart of my research involves the role of colloids and particles in environmental processes. Environmental colloids can be described as particles smaller than one micrometer. They can make up a significant proportion of suspended sediments and are important in that they: effectively bind pollutants; do not readily settle out of surface waters; and are mobile in groundwater’s. Consequently they can facilitate the transport of pollutants. Currently not much is known about the abundance and properties of environmental colloids. Much of my work has been involved in the development of methods to collect and analyze colloids from rivers, reservoirs, mountain streams, soil solutions, and groundwater’s.

Another aspect of my research deals with field-flow fractionation (FFF). FFF is a family of related methods that provides a high-resolution, size separation of macromolecules, colloids and particles over an ultimate range of a few thousand Daltons to 50 micrometers. One significant advantage of FFF over other size analysis methods is that it provides a separation, which allows further analysis of colloids as a function of size. Currently my research group is using FFF to examine soil particle composition over a size range of 1-25 micrometers. Other methods we have used in conjunction with FFF are electron microscopy and X-ray diffraction; develop and application of size separation methods; isolation and characterization of natural organic matter.


256 Coolbaugh Hall
(303) 273 3004
Fax: (303) 273 3629

Labs and Research Centers


  • BS, Lake Superior State University
  • MS, Colorado School of Mines
  • PhD, Colorado School of Mines
  • Postdoctoral Study, Monash University, Australia


  • Poda A.R., Bentner A.J., Kennedy A.J., Harmon A., Hull M., Mitrano D.M., Ranville J.F., Steevens J.   Characterization of silver nanoparticles using flow-field flow fractionation interfaced to inductively coupled plasma mass spectrometry J. Chromatography A2011, 1218, 4219 – 4225.
  • Zielinski R.A., Al-Hwaiti M.S., Budahn J.R., Ranville J.F.  Radionuclides, trace elements, and radium residence in phosphogypsum of Jordan Environmetal Geochemistry and Health 2011, 43, 149 – 165.
  • Al-Hwaiti M.S. and Ranville J.F. Distribution of potentially toxic metal and radionuclide contamination in soils related to phosphogypsum waste stockpiling in the Eshidiya Mine, Jordan Geochemistry-Exploration Environment Analysis 2010, 10, 419 – 433.
  • Pace H.E., Lesher E.K., Ranville J.F. INFLUENCE OF STABILITY ON THE ACUTE TOXICITY OF CdSe/ZnS NANOCRYSTALS TO DAPHNIA MAGNA Environmental Toxicology and Chemistry 2010, 29, 1338 – 1343.
  • High W.A., Ranville J.F., Brown M., Punshon T., Lanzirotti A., Jackson B.P. Gadolinium deposition in nephrogenic systemic fibrosis: An examination of tissue using synchrotron x-ray fluorescence spectroscopy J. American. Acad. Dermatology 2010, 62, 38 – 44.