Tim GrundlTim Grundl

Professor

346 Lapham Hall
(414) 229-4765
grundl@uwm.edu
Vita (pdf-80kb)

Degrees:
Ph.D., Colorado School of Mines
M.S., Northern Illinois University
B.S., University Of Delaware

Key Areas of Interest: Groundwater for contamination, Environmental issues & regulations, Lake & groundwater element cycling

Teaching Areas: Chemical Hydrogeology, Contaminant Transport, Field Methods in Hydrogeology, Environmental Geology

Research Interests: I am currently involved in multiple lines of inquiry. The first is a comprehensive look into the overall geochemistry of the deep sandstone aquifer in eastern Wisconsin and the upper Midwest in general. Although this aquifer is the pre-eminent source of groundwater within Wisconsin and Illinois it is over utilized and is coming under increasingly severe stress. The last of the Pleistocene ice advances injected a large pulse of fresh Pleistocene water into this aquifer and through the use of noble gas and stable isotope data we are in the process of unraveling the dynamics of this one-time event.

Another line of inquiry is a study of the shallow aquifer in southeastern Wisconsin to ascertain what effects would occur if treated effluent, complete with a high chloride load and a variety of emerging contaminants is used to recharge the aquifer either directly in an effort to reduce the effects of overpumping or indirectly by the use of riverbank infiltration. We are currently exploring several geochemical indicators to discriminate between recharge that contains treated effluent and recharge impacted by road salt.

A third line of inquiry is the development, in collaboration with other colleagues, of a suite of in-situ probes for the rapid, in-situ detection of contamination in submerged sediments. Our probes allow real-time identification of PAH and heavy metal con- tamination in sediments for a fraction of the effort involved in the typical coring and subsequent lab analysis that is in use today. These probes induce contaminant fluores- cence using laser or x-ray excitation (for PAHs and metals respectively).

Selected Publications:

Elam, T., Grundl, T., Leupin, O., Descostes, M., 2013. “Design of an In-situ XRF Instrument for Elemental Diffusion Measurements” Advances in X-ray Analysis, Vol. 56, pp. 157-166.

Grundl, T. J., Magnusson, N., Brennwald, M., Kipfer, R. 2013. Mechanisms of subglacial groundwater recharge as derived from noble gas, 14C and stable isotopic data. Earth Planetary Sci. Let., 369-370, p. 78-85.

Winkel, L.H.E., Johnson, C.A., Lenz, M., Grundl, T., Leupin, O.X., Amini, M., Charlet, L. 2012. Environmental Selenium Research: From Microscopic Processes to Global Understanding (Feature Article), Environ. Sci. Technol., 46 (2): 571–579.

Grundl, T., Haderlein, S., Nurmi, J., Tratnyek, P. 2011. Introduction to aquatic redox chemistry in Aquatic Redox Chemistry, Tratnyek, P., Grundl, T., Haderlein, S. (Eds.) ACS Symposium Series Vol 1071, pp.1-14.

Grundl, T., Magnusson N., Krall, J. 2011. Assessing the effects of Pleistocene glaciation on the sandstone aquifer in eastern Wisconsin. Final Report submitted to UW System Groundwater Research Program Project #WR09R004. 26 pp.

Alessi, D. and Grundl, T. 2008. Reduction of 2,4,6-trinitrotoluene (TNT) and hexahydro-1,3,5- trinitro-1,3,5-triazine (RDX) by hydroxyl-complexed Fe(II). Journal Environ. Engrg. 134(12):937-943.

Klump, S., Grundl, T., Purtschert, R., Kipfer, R. 2008. Groundwater and climate dynamics of derived from noble gas, 14C and stable isotope data. Geology 36(5):395-398.

Grundl, T. and Elam, T. 2007. An In-situ Probe for Metal-Contaminated Harbor Sediments. Final Report submitted to USEPA Great Lakes National Program Office. 33 pp.

Grundl, T., Cape, M. 2006. Geochemical factors controlling radium activity in a sandstone aquifer. Ground Water 44(4):518-527.

Schultz, C. and Grundl, T. 2004. pH Dependence of ferrous sorption onto two smectite clays. Chemosphere 57(10):1301-1306.

Grundl, T., Aldstadt, J, Harb, J., St. Germain, R., Schweitzer, B. 2003. Demonstration of a Method for the Direct Determination of Polycyclic Aromatic Hydrocarbons in Submerged Sediments. ES&T 37(6):1189-1197.

Current Research


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