Mark Chappell, PhD

Education

• 2004 Ph.D. (Soil Science), Iowa State University, Ames, IA, USA
• 1998 M.S. (Plant & Soil Science), University of Kentucky, Lexington, KY, USA
• 1995 B.S. (Agronomy), Brigham Young University, Provo, UT, USA

Professional Experience

• 2007: Research Physical Scientist, Environmental Laboratory, ERDC, US Army Corps of Engineers, Vicksburg, MS. 2005: ORISE Postdoctoral Research Fellow, US Environmental Protection Agency, Cincinnati, OH 2004: Postdoctoral Research Associate, Iowa State University, Ames, IA

Research Interests

• Fate and transport of dissolved and colloidal materials in soil and sediments; Dispersion dynamics of natural and manufactured materials; Interactions of surfactive materials with solids; In-situ speciation of metals using EXAFS; Chemical characterizatio of humics via solid-state NMR.

Research Projects

• 2008-2013: Environmental fate of nanoparticle dispersions (EQ/I - 6.2-6.3)
• 2011-2013: In-situ speciation of depleted uranium in soils (EQ/I, 6.2-6.3)
• 2011-2012: Structural characterization of fish exoskeleton through solid-phase nuclear absorption and Synchtron-based x-ray spectroscopies and scattering
• 2012-2014: Environmental fate of explosive compounds in formulated insensitive munitions
• 2010-2012: Follow-up studies on arsenic and selenium geochemical stability of fly ash spilled into the Emory River: Analyzing metalloid speciation during high intensity dredging, ash selenium photooxidation potential, and Pourbaix diagrams
• 2010-2012: Determination of appropriate sorption models and constants for munition constituent sorption on simple surfaces for computational modeling
• 2008: Chemistry of munition fate/transport in soil vadose zone; Geochemical fate of carbon nanotubes; Hg speciation and distribution in contaminated soils; Development of solid-phase UV-fluorescence technique for in-situ speciation of munition degradation products in soils/sediments
• 2007: Cd speciation in biosolids and biosolids-amended soils; In-situ pyromorphite formation in Pb-contaminated soils
• 2011-2013: In-situ speciation and stability of depleted uranium in soil
• 2011-2013: Predicting soil munition degradation potential by soil fertility through nutrient Quantity-Intensity relationships
• 2011-2013: Radical generation by ultrasonication of noble metal nanomaterials
• 2008-2010: Distributed Sources: Vadose zone movement of munition constituents under water-saturated and unsaturated conditions
• 2011-2013: Mobility of nanoparticle in soil
• 2012-2014: Colloidal transport of anthrax spores through soil

Professional Memberships

• Soil Science Society of America American Chemical Society Clay Mineral Society Society of Environmental Toxicology and Chemistry American Society of Civil Engineering

Additional

• Publications: 1. Lattao, C.; Li, Y.; Cao, X.; Mao, J.-D.; Schmidt-Rohr, K.; Chappell, M. A.; Miller, L. F.; de la Cruz, A. L.; Pignatello, J. J., Sorption selectivity in natural organic matter studied with nitroxyl paramagnetic relaxation probes. Environ. Sci. Technol. 2013, Accepted for publication. 2. Kennedy, A. J.; Chappell, M. A.; Bednar, A. J.; Ryan, A.; Laird, J. G.; Stanley, J. S.; Steevens, J. A., Impact of organic carbon on the stability and toxicity of fresh and stored silver nanoparticles. Environ. Sci. Technol. 2012, 46, 10772-10780. 3. Hull, M. S.; Kennedy, A. J.; Detzel, C.; Vikesland, P.; Chappell, M. A., Moving beyond mass: The unmet need to consider dose metrics in enviornmental nanotoxicology studies. Environ. Sci. Technol. 2012, 46, 10881-10882. 4. Handy, R. D.; van den Brink, N.; Chappell, M.; Muhling, M.; Behra, R.; Dusinska, M.; Simpson, P.; Ahtianen, J.; Jha, A. N.; Seiter, J.; Bednar, A. J.; Kennedy, A. J.; Fernandes, T. F.; Riediker, M., Practical considerations for conducting ecotoxicity test methods with manufactured nanomaterials: what have we learnt so far? Ecotoxicol. 2012, 21, 933-972. 5. Chappell, M. A.; Seiter, J. M.; Bednar, A. J.; Price, C. L.; Averett, D.; Lafferty, B.; Tappero, R.; Stanley, J. S.; Kennedy, A. J.; Steevens, J. A.; Pingheng, Z.; Morikawa, E.; Merchan, M.; Roy, A., Stability of solid-phase selenium species in dredged fly ash after prolonged submersion in a natural river system. Chemosphere 2012, Submitted (In Revision). 6. Chappell, M. A.; Middleton, M. A.; Miller, L. F.; Price, C. L.; Jackson, L. J.; Kennedy, A. J.; Bednar, A. J.; Steevens, J. A., Number density considerations for biological exposures from nanosilver suspensions. Environ. Sci. Technol. 2012, Submitted. 7. Cao, X.; Pignatello, J. J.; Li, Y.; Lattao, C.; Chappell, M. A.; Chen, N.; Miller, L. F.; Mao, J.-D., Characterization of wood chars produced at different temperatures using advanced solid-state 13C NMR spectroscopic techniques. Energy Fuels 2012, In Press. 8. Cao, X.; Chappell, M. A.; Schimmelmann, A.; Mastalerz, M.; Li, Y.; Mao, J.-D., Chemical structures changes in kerogen from bituminous coal in response to dike intrusions as investigated by advanced solid-state 13C NMR spectroscopy. Intl. J. Coal. Geol. 2012, In Press. 9. Cao, X.; Chappell, M. A.; Schimmelmann, A.; Mastalerz, M.; Li, Y.; Hu, W.; Mao, J.-D., Chemical structure changes in kerogen from bituminous coal in response to dike intrusions as investigaed by advanced solid-state 13C NMR spectroscopy. Intl. J. Coal. Geol. 2012, 88, 67-74. 10. Cao, X.; Birdwell, J. S.; Chappell, M. A.; Li, Y.; Pignatello, J. J.; Mao, J.-D., Characterization of oil shale, isolated kerogen, adn post-pyrolysis residues using advanced 13C solid-state nuclear magnetic resonance spectroscopy. AAPG Bull. 2012, Submitted. 11. Brown, S. L.; Clausen, I.; Chappell, M. A.; Scheckel, K. G.; Newville, M.; Hettiarchichi, G. M., High-Iron biosolids compostinduced changes in lead and arsenic speciation and bioaccessibility in Co-contaminated Soils. J. Environ. Qual. 2012, 41, 1612-1622. 12. Price, C. L.; Chappell, M. A.; Pettway, B. A.; Porter, B. E., Potential anaerobic bioremediation of perchlorate contaminated soils through biosolids applications. In Environmental Fate of Explosives and Propellants, Chappell, M. A.; Price, C. L.; George, R. D., Eds. American Chemical Society: 2011; Vol. 1069, pp 355-362. 13. Chappell, M. A.; Price, C. L.; Porter, B. E.; Pettway, B. A.; George, R. D., Differential Kinetics and Temperature Dependence of Abiotic and Biotic Processes Controlling the Environmental Fate of TNT in Simulated Marine Systems. Marine Pollut. Bull. 2011, 62, 1736-1743. 14. Chappell, M. A.; Price, C. L.; Miller, L. F., Solid-phase considerations for the environmental fate of nitrobenzene and triazine munition constituents in soil. Appl. Geochem. 2011, 26, S330-S333. 15. Chappell, M. A.; Price, C. L.; George, R. D., Environmental fate of explosives and propellants. American Chemical Society: 2011; Vol. 1069. 16. Chappell, M. A.; Price, C. L.; Bourne, G. G.; Pettway, B. A.; Porter, B. E., Soil vadose zone chemistry of TNT and RDX under water-saturated conditions. In Environmental Chemistry of Explosives and Propellant Compounds in Soils and Marine Systems: Distributed Source Characterization and Remedial Technologies, Chappell, M. A.; Price, C. L.; George, R. D., Eds. American Chemical Society: 2011; Vol. 1069, pp 217-227. 17. Chappell, M. A.; Miller, L. S.; George, A. J.; Price, C. L.; Mao, J.-D.; Bednar, A. J.; Seiter, J. M.; Kennedy, A. J.; Steevens, J. A., Simultaneous dispersion-dissolution of concentrated silver nanoparticle suspensions in the presence of model organic compounds. Chemosphere 2011, 84, 1108-1116. 18. Chappell, M. A., Solid-phase considerations for the environmental fate of TNT and RDX in soil. In Environmental Chemistry of Explosives and Propellant Compounds in Soils and Marine Systems: Distributed Source Characterization and Remedial Technologies, Chappell, M. A.; Price, C. L.; George, R. D., Eds. American Chemical Society: 2011; Vol. 1069, pp 1-25. 19. Cao, X.; Ro, K. S.; Chappell, M. A.; Li, Y.; Mao, J.-D., Chemical structures of swine-manure chars produced under different carbonization conditions investigated by advanced solid-state 13C nuclear magnetic resonance (NMR) spectroscopy. Energy Fuels 2011, 25, 388-397. 20. Cao, X.; Olk, D. C.; Chappell, M. A.; Cambardella, C. A.; Miller, L. F.; Mao, J.-D., Solid-state NMR analysis of soil organic matter fractions from integrated physical-chemical extraction. Soil Sci. Soc. Am. J. 2011, 75, 1374-1384. 21. Cao, X.; Mastalerz, M.; Chappell, M. A.; Miller, L. F.; Li, Y.; Mao, J.-D., Chemical structures of coal lithotypes before and after CO2 adsorption as investigated by advanced solid-state 13C nuclear magnetic resonance spectroscopy. Intl. J. Coal. Geol. 2011, 88, 67-74. 22. Cao, X.; Mastalerz, M.; Chappell, M. A.; Miller, L. F.; Li, Y.; Mao, J.-D., Chemical structures of coal lithotypes before and after CO2 adsorption as investigated by advanced solid-state 13C nuclear magnetic resonance spectroscopy. International J. Coal Geol. 2011, In Press. 23. Blaustein, G. S.; Chappell, M. A. Interaction energies between spherical colloidal particles in a symmetric electrolyte solution, Wolfram Demonstration Project, 2011. 24. Berge, N. D.; Ro, K. S.; Mao, J.-D.; Flora, J. R. V.; Chappell, M. A.; Bae, S., Hydrothermal carbonization of municipal waste streams. Environ. Sci. Technol. 2011, 45, 5696-5703. 25. Holtman, K. M.; Chen, N.; Chappell, M. A.; Kadla, J. F.; Xu, L.; Mao, J.-D., Chemical structure and heterogeneity differences of two lignins from Loblolly Pine as investigated by advanced solid-state NMR spectroscopy. J. Agri. Food Chem. 2010, 58, 9882-9892. 26. Fang, X.; Mao, J.-D.; Chappell, M. A.; Norton, M. E.; Markley, J. L., Alteration of corn stover cell wall composition and functionality following ammonia fiber explosion (AFEX) pretreatment: Investigations by solution and solid-state nuclear magnetic resonance spectroscopy. Bioresource Technol. 2010, Accepted for Publication. 27. Bednar, A. J.; Jones, W. T.; Chappell, M. A.; Johnson, D. R.; Ringelberg, D. B., A modified acid digestion procedure for extraction of tungsten from soil. Talanta 2010, 80, 1257-1263. 28. Bednar, A. J.; Chappell, M. A.; Seiter, J. M.; Stanley, J. K.; Averett, D. E.; Jones, W. T.; Pettway, B. A.; Kennedy, A. J.; Hendrix, S. H.; Steevens, J. A., Geochemical investigations of metals release from submerged coal fly ash using extended elutriate tests. Chemosphere 2010, 81, 1393-1400. 29. Steevens, J.; Bednar, A. J.; Brame, J.; Chappell, M.; Kennedy, A. J.; Seiter, J.; Stanley, J. Evaluation of metals release from oxidation of fly ash during dredging of the Emory River, TN; U.S. Army Engineer Research & Development Center: Vicksburg, MS, 2009. 30. Kennedy, A. J.; Gunter, J. C.; Chappell, M. A.; Goss, J. D.; Hull, M. S.; Kirgan, R. A.; Steevens, J. A., Influence of nanotube preparation in aquatic bioassays. Environ. Toxicol. Chem. 2009, 28, 1930-1938. 31. Furey, J.; Morgan, J.; Chappell, M., High spatial resolution spectral imaging for detecting particulate contaminants. IJERPH 2009. 32. Chappell, M. A.; George, A. J.; Dontsova, K. M.; Porter, B. E.; Price, C. L.; Zhong, P.; Morikawa, E.; Kennedy, A. J.; Steevens, J. A., Surfactive stabilization of multi-walled nanotube dispersions with dissolved humic substances. Environ. Pollut. 2009, 157, 1081-1087. 33. Tervonen, T.; Figueira, J. R.; Chappell, M.; Steevens, J. A.; Merad, M.; Linkov, I., Risk-based classification system of nanomaterials. J. Nanoparticle Res. 2008, DOI 10.1007/s11051-008-9546-1. 34. Metcalfe, C.; Bennett, E.; Chappell, M.; Steevens, J.; Depledge, M.; Goss, G.; Goudey, S.; Kaczmar, S.; O'Brien, N.; Picado, A.; Ramadan, A., SMARTEN: Strategic Management and Assessment of Risks and Toxicity of Engineered Nanomaterials. In Nanotechnology: Risks and Benefits, Linkov, I.; Steevens, J., Eds. Springer: The Netherlands, 2008; pp 93-108. 35. Mathangwane, B. T.; Chappell, M. A.; Pils, J. R. V.; Sonon, L. S.; Evangelou, V. P., Dispersion potential of selected Iowa lake sediments as influenced by dissolved and solid-phase constituents. Clean 2008, 36, 201-208. 36. Linkov, I.; Steevens, J.; Adlakha_Hutcheon, G.; Bennett, E.; Chappell, M.; Colvin, V.; Davis, M.; Davis, T.; Elder, A.; Foss-Hansen, S.; Hakkinen, P.; Hussain, S.; Karkan, D.; Korentein, R.; Lunch, I.; Metcalfe, C.; Ramadan, A.; Satterson, K., Emerging methods and tools for environmental risk assessment, decision-making, and policy for nanomaterials: Summary of NATO Advanced Research Workshop. J. Nanoparticle Res. 2008, 11, 513-527. 37. Laird, D. A.; Chappell, M. A.; Martens, D. A.; Wershaw, R. L.; Thompson, M. L., Distinguishing black carbon from biogenic humic substances in soil clay fractions. Geoderma 2008, 143, 115-122. 38. Kennedy, A. J.; Hull, M. S.; Steevens, J. A.; Dontsova, K. M.; Chappell, M. A.; Gunter, J. C.; Weiss, C. A., Jr., Factors influencing the partitioning and toxicity of nanotubes in the aquatic environment. Environ. Toxicol. Chem. 2008, 27, 1932-1941. 39. Chappell, M. A., Solid-phase characteristics of engineered nanoparticles: A multi-dimensional approach. In Nanotechnology: Risks and Benefits, Linkov, I.; Steevens, J. A., Eds. Springer: The Netherlands, 2008; pp 109-122. 40. Bednar, A. J.; Jones, W. T.; Boyd, R. E.; Kirgan, R. A.; Chappell, M.; Clausen, J., Mobility, geochemistry, and speciation of tungsten. In Army Science Conference, Orlando, FL, 2008. 41. Bednar, A. J.; Boyd, R. E.; Jones, W. T.; McGrath, C. J.; Johnson, D. R.; Chappell, M. A., Investigations of tungsten mobility in soil using column tests. Chemosphere 2008, 75, 1049-1056. 42. Chappell, M. A.; Scheckel, K. G., Effect of "quick lime" (Ca(OH)2) on the stability of pyromorphite in the presence of clay and soil sorbents. Environ. Chem. 2007, 4, 109-113. 43. Chappell, M. A.; Laird, D. A.; Thompson, M. L.; Li, H.; Aggarwal, V.; Teppen, B. J.; Johnston, C. T.; Boyd, S. A., Influence of smectite hydration and swelling on atrazine sorption behavior. Environ. Sci. Technol. 2005, 39, 3150-3156. 44. Chappell, M. A.; Laird, D. A.; Thompson, M. L.; Evangelou, V. P., Co-sorption of atrazine and a lauryl polyoxyethylene oxide nonionic surfactant on smectites. J. Agri. Food Chem. 2005, 53, 10127. 45. Evangelou, V. P.; Marsi, M.; Chappell, M. A., Potentiometric-spectroscopic evaluation of metal-ion complexes by humic fractions extracted from corn tissue. Spectrochimica Acta A 2002, 58, 2159-2175. 46. Chappell, M. A.; Evangelou, V. P., Influence of added potassium on ammonium selectivity/mobility with soils exhibiting vermiculitic behavior. Soil Sci. 2000, 165, 858-868. 47. Chappell, M. A.; Evangelou, V. P., Influence of potassium on inducing ammonium fixation and inhibiting nitrification. Soil Sci. 2000, 165, 420-426.

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