Dr. Peter Santschi

Amon picture

Phone: (409) 740-4476
Fax: (409) 740-4787
Email: santschi@tamug.edu

Texas A&M University at Galveston
P.O. Box 1675 
Galveston, Texas 77553

Course Offerings:

Texas A&M University (Graduate):
- Isotope Geochemistry
- Seminar in Oceanography/Marine Science
- Dynamics of Environmental Colloids

 Swiss Institute of Technology (ETH) in Zurich, Switzerland:
 - Geochemical Oceanography
 - Radioactivity in the Environment
 - Environmental Colloids

Hong Kong University of Science and Technology:
 - Marine Organic Chemistry
 - Marine Colloids Chemistry
 - Marine Radiochemistry
 Texas A&M University at Galveston (Undergraduate):
 - Chemical Oceanography
 - Geological Oceanography
 - Environmental Chemistry
 - Environmental Geology
 - Geochemistry

Regents Professor


- Ph.D. Chemistry, University of Berne, Switzerland, 1975
- M.S. Chemistry, University of Berne, Switzerland, 1971
- B.S. Gymnasium Berne, Switzerland, Matura 1963

Research Interests:

A broad range of topics in Chemical Oceanography, Limnology and Hydrology, including tracer applications using radioactive and stable isotopes, relationships between trace element and natural organic matter geochemistry, and importance of exopolymeric substances for trace element binding and removal from natural waters. Recent work centered on relationships between actinide elements, 129I, a number of trace and ultra-trace elements, PCBs, dioxins, and natural organic matter, including humic exopolymeric substances in the aquatic environment.



- Environmental RadioBioGeoChemistry

Selected Publications: 2011-2012:

Johnson, B.E., Santschi, P.H., Addleman, R.S., Douglas, M., Davidson, J., and Schwantes, J. 2011. Collection of fission and activation product elements from fresh and ocean waters: a comparison of traditional and novel sorbents. Applied Radiation and Isotopes, 69, 205–216.

Duan, S.W., Bianchi, T.S., Santschi, P.H., and Amon, R.W.M. 2011. Temperature Control on Soluble Reactive Phosphorus in the Lower Mississippi River. Estuaries and Coasts, DOI 10.1007/s12237-010-9284-3, Vol. 34(1), 78-89.

Xu, C., Santschi, P. H., Hung, C.-C., Zhang, S. , Schwehr, K,A., Roberts, K.A., Guo, L.D., Gong, G.-C., Quigg, A., Long, R., Pinckney, J., Duan, S.W., Amon, R., Wei, C.-L. 2011. Controls of Th-234 removal from the oligotrophic ocean by polyuronic acids and modification by microbial activity. Marine Chemistry, 123, 111–126.

Kaplan, D.I., Roberts, K.A., Schwehr, K.A., Lilley, M.S., Brinkmeyer, R., Denham, M.E., DiPrete, D., Hsiu-Ping Li, H.-P., Powell, B.A., Xu, C., Yeager, C.M., Zhang, S.J., Santschi, P.H. 2011. Evaluation of a Radioiodine Plume Increasing in Concentration at the Savannah River Site. Env. Sci. Technol., 45, 489-495.

Li, H.-P., Brinkmeyer, R., Jones, W.L., Zhang, S.J., Xu, C., Schwehr, K.A., Santschi, P.H., Kaplan, D., Yeager, C.M. 2011. Iodide accumulation by aerobic bacteria isolated from subsurface sediments of a 129I-contaminated aquifer at the Savannah River Site, S.C. Applied Environmental Microbiology, 77(6), 2153–2160.

Wen, L.-S., Warnken, K.W., Santschi, P.H., Li, H.-P., Davison, W., Zhang, H., Li, H.-P., and Jiann, K.-T. 2011. Molecular weight and chemical reactivity of dissolved trace metals (Cd, Cu, Ni) in surface waters from the Mississippi River to Gulf of Mexico. Estuarine Coastal and Shelf Science, 92, 649-658.

Zhang, S., Du, J., Xu, C., Schwehr, K.A., Ho, Y.-F., Li, H.-P., Roberts, K.A., Kaplan, D.I., Brinkmeyer, R., Yeager, C.M., Chang, H.-S., Santschi, P.H. 2011. Concentration dependent mobility, retardation and speciation of iodine in surface sediment from the Savannah River Site. Environmental Science and Technology, 45, 5543-5549.

Chen, C.-S., Anaya, J.M., Zhang, S., Spurgin, J., Chuang, C.-Y., Xu, C., Miao, A.-J., Chen, E.Y.T., Schwehr, K.A., Jiang, Y., Quigg, A., Santschi, P.H., and Chin, W.-C. 2011. Effects of engineered nanoparticles on the assembly of exopolymeric substances from marine phytoplankton. PLoS ONE, July 2011 | Volume 6 | Issue 7 | e21865.

Hung, C.-C., Gong, G.-C., Ko, F.-C., Lee, H.-J., Chen, H.-Y., Wu, J.-M., Hsu, M.-L., Peng, S.-C., Nan, F.-H., Santschi, P.H. 2011. Polycyclic aromatic hydrocarbons in surface sediments of the East China Sea and their relationship associated with carbonaceous materials. Marine Pollution Bulletin, 63, 464–470.

Otosaka, S., Schwehr, K.A., Kaplan, D.I., Roberts, K.A., Zhang, S., Xu, C., Li, S.-P., Ho, Y.-F., Brinkmeyer, R., Yeager, C.M., Santschi, P.H. 2011. Transformation and transport processes of 127I and 129I species in an acidic groundwater plume at the Savannah River Site. Science of the Total Environment, 409, 38573865.

Xu, C., Zhang, S., Ho, Y.-F., Miller, E.J., Roberts, K.A., Li, H.-P., Schwehr, K.A., Otosaka, S., Kaplan, D.I., Brinkmeyer, R., Yeager, C.M., Santschi, P.H. 2011. Is soil natural organic matter a sink or source for radioiodine (129I) at the Savannah River Site? Geochim. Cosmochim. Acta, 75, 5716–5735.

Xu, C., Zhang, S., Chuang, C.-Y., Miller, E.J., Schwehr, K.A., Santschi, P.H. 2011. Chemical properties of strongly actinide binding exopolymeric substances (EPS) from two bacteria (Sagittula stellata and Pseudomonas fluorescens Biovar II). Marine Chemistry, 126, 27-36.

Wei, C.-L., Lin, S.-Y., Sheu, D.D.-D., Chou, W.-C., Yi, M-C., Santschi, P.H., and Wen, L.-S. 2011. Particle-reactive Radionuclides (234Th, 210Pb, 210Po) as Tracers for the Estimation of Export Production in the South China Sea. Biogeosciences, 8, 3793–3808.

Xu, C., Miller, E.J., Zhang, S., Li, H.-S., Ho, Y.-F., Schwehr, K.A., Kaplan, D.I., Roberts, K.A., Otosaka, S., Brinkmeyer, R., Yeager, C.M., Santschi, P.H. 2011. Sequestration and re-mobilization of radioiodine (129I) by soil organic matter and possible consequences of the remedial action at Savannah River Site. Env. Sci. Technol., 45, 99759983.

Johnson, B.E., Santschi, P.H., Addleman, R.S., Douglas, M., Davidson, J., Schwantes, J. 2011. Optimization and Evaluation of Mixed-Bed Chemisorbents for Extracting Fission and Activation Products from Marine and Fresh Waters, Analytica Chimica Acta 708, 52– 60.

Li, H.-P., Brinkmeyer, R., Jones, W.L., Zhang, S., Xu, C., Ho, Y.-F., Schwehr, K.A., Kaplan, D.I., Santschi, P.H., and Chris M. Yeager, C.M. 2012. Iodide Oxidizing Activity of Bacteria from Subsurface Sediments of the Savannah River Site, SC, USA, p. 89-97. In M. Kawaguchi, K. Misaki, H. Sato, T. Yokokawa, T. Itai, T. M. Nguyen, J. Ono, and S. Tanabe (ed.), Interdisciplinary Studies on Environmental Chemistry Vol. 6 - Environmental Pollution and Ecotoxicology. Terra Scientific Publishing Company Tokyo.

Li, H.-P., Yeager, C.M., Brinkmeyer, R., Zhang, S., Ho, Y.-F., Xu, C., Jones, W.L., Schwehr, K.A., Otosaka, S., Kaplan, D.I., Santschi, P.H. 2012. Organic acids produced by subsurface bacteria enhance iodide oxidation in the presence of hydrogen peroxide. Environmental Science and Technology, 46, 4837-4844.

Hung, C.-C., Gong, G.-C., Santschi, P.H. 2012. 234Th in different size classes of sediment trap collected particles from the Northwestern Pacific Ocean. Geochim. Cosmochim. Acta, 91, 60–74.

Maiti K., Buesseler K.O., Pike, M., Benitez-Nelson, C., Cai, P.H., Chen, W.F., Cochran, K., Dai, M.H., Dehairs, F., Gasser, B., Kelly, R.P., Masque, P., Miller, L., Miquel, J.C., Moran, S.B., Morris, P.J., Peine, F., Planchon, F., Renfro, A.A., Rutgers van der Loeff, M., Santschi, P.H., Turnewitsch, R., Waples, J.T., Xu, C. 2012. Intercalibration studies of short-lived Thorium-234 in the water column and marine particles. L&O Methods Special volume on GEOTRACES intercalibrations, 10, 631-644.

Zhang, S.J., Jiang, Y.L., Chen, C.-S., Spurgin, J., Schwehr, K.A., Quigg, A., Chin, W.-C., and Santschi, P.H. 2012. Aggregation and dissolution of quantum dots in marine environments: importance of extracellular polymeric substances. Env. Sci. & Technol., 46, 87648772.

Xu, C., Zhong, J.Y., Hatcher, P.G., Zhang, S., Li, H.-P., Ho, Y.-F., Schwehr, K.A., Kaplan, D.I., Roberts, K.A., Brinkmeyer, R., Yeager, C.M., Santschi, P.H. 2012. The molecular environment of stable iodine and radioiodine (129I) in natural organic matter: evidence from NMR. Geochim. Cosmochim. Acta, 97, 166–182.

Johnson, B.E., Santschi, P.H., Chuang, C.-Y., Otosaka, S., Addleman, R.S., Rutledge, R.D., Chouyyok, W., Davidson, J., Fryxell, G.E., Schwantes, J.M. 2012. Collection of Lanthanides and Actinides from Natural Waters with Conventional and Nanostructured Sorbents. Environmental Science and Technology, 46, 1125111258.

Zhang, S., Jiang, Y., Chen, C.-S., Creeley, D., Schwehr, K.A., Quigg, A., Chin, W.-C., and Santschi, P.H. 2012. Ameliorating Effects by Extracellular Polymeric Substances excreted by Thalassiosira pseudonana on algal toxicity of CdSe Quantum Dots. Aquatic Toxicology, accepted.

Personal web page

Follow Us On: FacebookTwitteryoutube button