个人简介

Ph.D., University of New Hampshire B.S., Lemoyne College Biosketch Ryan, Ph.D., is an analytical/environmental chemist whose research interests center around the development of instrumental techniques to determine the various forms and reactions of pollutants in the environment. He has been involved in projects aimed at the assessment of chemical processes and environmental monitoring for over twenty years. For nearly eight years, he conducted research at the Edgerton Research Laboratory of the New England Aquarium, and performed several studies of contaminants in Boston Harbor and Massachusetts Bay. These included analysis of trace elements, polychlorinated biphenyls (PCBs) and other parameters in water, biota, and sediments. These projects were funded by the Massachusetts Bays Program, the South Essex Sewerage District (SESD), the Massachusetts Water Resources Authority (MWRA), and the Environmental Protection Agency (EPA). Ryan has been involved in the analysis of trace metal pollutants in Lake Chapala, Mexico with funding from the Government of Mexico and investigation of the impact of agrochemicals on the waters of Tortuguerro, Costa Rica, funded by the Caribbean Conservation Corps. Work in the area of soil remediation has focused on the use of electrokinetics for the removal of inorganic contaminants and soil flushing with surfactants for the removal of organic compounds. Two grants from the U.S. Geological Survey through the Water Resources Research Center at UMass Amherst have funded this work. Current research efforts are directed in four areas; the use of fluorescence and nuclear magnetic resonance spectroscopy to study the binding of potential pollutants to humic materials, the bioaccumulation and physiology of metals in aquatic organisms particularly shellfish, the oxidation/reduction reactions of alpha tocopherol (vitamin E) and the investigation of near critical emulsions of carbon dioxide and water stabilized by fine particles for carbon sequestration and enhanced oil recovery. Present funding is from DOE, Duke Energy, Mass DEP and the Massachusetts Technology Transfer Center (MTTC). He received a Ph.D. in chemistry from the University of New Hampshire (1983) and a B.S. in chemistry from LeMoyne College (1977). He was selected via national competitions for postdoctoral study in the Interdisciplinary Programs in Health at the Harvard School of Public Health (1983-1985) and as a Donner Research Fellow in the Environmental Sciences Program (presently EEOS) at the University of Massachusetts Boston (1988-1989). He is currently a Professor of Chemistry at the University of Massachusetts Lowell where he has been on the faculty since 1989.

研究领域

Analytical & Environmental Chemistry

Fluorescence of Natural Organic Compounds and Their Metal Complexes; Oxidation Reduction Reactions of Vitamin E (Tocopherol); Metal Binding Proteins in Bivalves; Particle Stabilized Emulsions for CO2 Sequestration, Enhanced Oil Recovery and Remediation

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Sharma, S.K., Kumar, S., Tyagi, R., Barry, E.F., Kumar, J., Watterson, A.C., Ryan, D.K., Parmar, V.S. (2008) Selective recognition of Ca2+ ions using novel polymeric phenols. Microchemical Journal, 90, 89-92. Golomb, D., Pennell, S., Barry, E., Ryan, D. and Swett, P. (2007) Ocean Sequestration of Carbon Dioxide: Modeling the Deep Ocean Release of a Dense Emulsion of Liquid CO2-in-Water Stabilized by Limestone Particles. Environ. Sci. Technol., 41, 4698-4704. Liang, C., Bruell, C.J., Albert, M.F., Cross, P.E. and Ryan, D.K. (2007) Evaluation of Reverse Osmosis and Nanofiltration for In Situ Persulfate Remediated Groundwater. Desalination, 208, 238-259. Golomb, D., Barry, E., Ryan, D., Swett, P. and Duan, H. (2006) Macroemulsion of Liquid and Supercritical CO2-in-Water and Water-in-Liquid CO2 Stabilized by Fine Particles. Ind. Eng. Chem. Res. 45, 2728-2733. Avanadula, R.M. and Ryan D.K. (2005) Measurement of Free Metal Ion in Equilibrium with Humic-Metal Complexes Using NMR Solvent Suppression Technique. In: Humic Substances: Molecular Details and Applications in Land and Water Conservation, Ghabbour E and Davies G (eds.), Taylor & Francis. Lee, N.C.Y., Ryan, D.K. and Rajesh, G. (2005) Quantitative Analysis of Aluminum and Soil Fulvic Acid Complexes by Solution State Aluminum-27 Nuclear Magnetic Resonance Spectroscopy. In: Humic Substances: Molecular Details and Applications in Land and Water Conservation, Ghabbour E. and Davies G (eds.), Taylor & Francis. Golomb, D., Barry, E., Ryan, D., Lawton, C. and Swett, P. (2004) Limestone-Particle-Stabilized Macroemulsion of Liquid and Supercritical Carbon Dioxide in Water for Ocean Sequestration. Environ. Sci. Technol., 38(16), 4445-4450, 2004. Hsieh, Chi-Ying, Tsai, Meng-Hsiun, Ryan, David K. and Pancorbo, Oscar C. (2004) Toxicity of the 13 priority pollutant metals to Vibrio fisheri in the Microtox® chronic toxicity test. Sci. Total Environ., 320, 37-50. Hays, M.D., Ryan, D.K. and Pennell, S. (2004) A Modified Multisite Stern-Volmer Equation for the Determination of Conditional Stability Constants and Ligand Concentrations of Soil Fulvic Acid with Metal Ions. Anal. Chem., 76(3), 848-854. Hays, Michael D.; Ryan, David K. and Pennell, Stephen. (2003) Multi-wavelength fluorescence-quenching model for determination of Cu2+ conditional stability constants and ligand concentrations of fulvic acid. Applied Spectroscopy. 57(4), 454-460. Lee, N.C.Y. and Ryan, D.K. (2003) Study of Fulvic-Aluminum(III) Ion Complexes By 27Al Solution NMR. In: Humic Substances: Nature's Most Versatile Materials, Ghabbour E and Davies G (eds.), Taylor & Francis. Ryan, D.K. (2000) Liquid Chromotography: Humic Substances, in Encyclopedia of Separation Science, Academic Press, London. Coolidge, C.L. and Ryan, D.K. (2000) Binding of Organic Nitrogen Compounds to Soil Fulvic Acid as Measured by Molecular Fluorescence Spectroscopy, in "Humic Substances Versatile Components of Plants, Soil and Water", E.A. Ghabbour and G. Davies , Eds., Royal Society of Chemistry, Cambridge. Bruell, C.J., Barker, C.C., Ryan, D.K. and Duggan, J.W. (1998) Surfactant enhanced flushing of unsaturated porous media. J. Soil Contam. 7(1), 47-71. Shine, J., Ford, T. and Ryan, D.K. (1998) Annual cycle of heavy metals in a tropical lake--Lake Chapala, Mexico. J. Environ. Sci. Health A33, 23-43. Robinson, W.E., Ryan, D.K., Sullivan, P.A. and Boggs, C.C. (1997) Cadmium transport in the blood plasma of two marine bivalves. Environ. Toxicol. Chem. 16(6), 1195-1202 (1997). Liu, X and Ryan, D.K. (1997) Analysis of fulvic acids using HPLC/UV coupled toFT-IR Spectroscopy. Environmental Technology 18, 417-424 (1997). Golomb, D., Ryan, D., Eby, G.N., Underhill, J. and Zemba, S. (1997) Atmospheric deposition of toxics onto Massachusetts Bay: I. Metals. Atmospheric Environment 31(9), 1349-1359 (1997). Golomb, D., Ryan, D., Underhill, J., Wade, T. and Zemba, S. (1997) Atmospheric deposition of toxics onto Massachusetts Bay: II. Polycyclic aromatic hydrocarbons. Atmospheric Environment 31(9), 1361-1368. Crawford, S.C., Bruell, C.J., Ryan, D.K. and Duggan, J.W., (1997) "Effects of emulsion viscosity during surfactant enhanced soil flushing in porous media. J. Soil Contamin. 6(4), 355-370.