Skip Nav
Dr. Peter Santschi
Peter Santschi
(409) 740-4476
(409) 740-4787
TAMU Galveston Marine Sciences
200 Seawolf Parkway Galveston, Texas 77553

Ph.D., (lic. phil. II) Chemistry, University of Berne , 1975

M.S., Chemistry, University of Berne , 1971

B.S., (Matura) Gymnasium Berne , 1963 

Privatdozent, Isotope Geochemistry, Swiss Federal Institute of Technology (ETH), Z�rich, Switzerland, 1984.
  • Regents Professor of Texas A&M University, 2009

  • The Association of Former Students Distinguished Achievement Award for Research, 2004


Peter Santschi

Regents Professor

Research Interests

  • Chemical Oceanography
  • Marine Isotope Geochemistry
  • Coagulation processes/colloid composition and dynamics
  • Trace element (e.g., iodine) and actinide binding to natural organic compounds
  • Land-Ocean Interactions

Selected Publications

Selected Publications

230. Yeager, K.M., Brinkmeyer, R., Rakocinski,C.F., Schindler, K.S., and Santschi, P.H. 2010. Impacts of dredging activities on the accumulation of dioxins in surface sediments of the Houston Ship Channel, Texas. J. Coastal Res. 26, 743-752.

231. Verdugo, P., Santschi, P.H. 2010. Polymer dynamics of DOC networks and gel formation in seawater. Deep Sea Research II, 57, 1486-1493.

232. Hung, C.-C., Xu, C., Santschi, P.H., Zhang, S., Schwehr, K.A.,  Quigg, Guo, L., Gong, G.-C., A., Pinckney, J., Long, R., and Wei, C.-L. 2010. Comparative evaluation of sediment-trap and 234Th-derived POC fluxes from the upper oligotrophic waters of the Gulf of Mexico and the subtropical northwestern Pacific Ocean. Mar. Chem, 121, 132–144.

233. Duan, S.W., Bianchi, T.S., Santschi, P.H., and Amon, R.M.W. 2010. Effects of tributary inputs on nutrient export from the Mississippi and Atchafalaya River to the Gulf of Mexico. Marine and Freshwater Research, 61, 1029-1038.

234. Hung, C.-C., Gong, G.-C., Ko, F.-C., Chen, H.-Y., Hsu, M.-L., Wu, J.-M., Peng, S.-C., Yeager, K.M., Santschi, P.H. 2010. Carbonaceous materials as a pollution marker to evaluate persistent organic pollutants in aquatic sediments. Marine Pollution Bulletin, 60(7), 1010-1017.

235. Zhang, S., Schwehr, K.A., Ho, Y., Xu, C.,  Roberts, K.A., Kaplan, D., Santschi, P.H. 2010. A novel approach for the simultaneous determination of iodide, iodate, and organo-iodide for 127I and 129I in Environmental Samples Using  Gas Chromatography - Mass Spectrometry. Env. Sci. Technol., 44, 9042-9048.

236. Schwantes, J.M., and Santschi, P.H. 2010. Mechanisms of Plutonium sorption to mineral oxide surfaces: New insights with implications to colloid-enhanced migration. Radiochim. Acta, 98(9-11), 737-742.

237. Miao, A.-J., Luo, Z., Chen, C.-S., Chin, W.-C., Santschi, P.H., Quigg, A. 2010. Zinc Oxide Engineered Nanoparticles: Dissolution and Toxicity to Marine Phytoplankton. Environ. Tox. Chem., 29, 2814 -2822.

238. Miao, A.-J., Luo, Z., Chen, C.-S., Chin, W.-C., Santschi, P.H., and Quigg, A. 2010. Intracellular uptake: A possible mechanism for silver engineered nanoparticle toxicity to a freshwater alga. PLoS ONE, 5(12), 1-8 (e15196).

239. 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.

240. 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.

241. 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.

242. 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., 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.

243. 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.

244. 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.

245. 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.

246. 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.

247. 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, in press.

248. 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, in press.

249. 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., SantschiP.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, in press.

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

251. 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., accepted.

Additional Information

  • Collaborative Research: Biogeochemical and Microbial Controls of Iodine-129 Mobility in Groundwater Relevant to Long-Term Stewardship of DOE Sites”, Peter H. Santschi, Robin Brinkmeyer and Kathleen Schwehr, co-PIs,2008-2011 ($721,248).
  • Penobscot River Mercury Study Panel - Radiochemical analyses of sediment cores from the Penobscot River and Estuary, Peter H. Santschi, PI, Bryce Johnson, Kathleen Schwehr, Patrick Louchouarn, co-PIs, 2009-2011 ($330,400).
  • NSF-OCE, “Collaborative Research: Examining the Binding of Radionuclides with Marine Biopolymers, A Comparative Study on Th, Pa, Be, Po and Pb Isotopes”, Peter H. Santschi, PI, Kathy Schwehr, Laodong Guo, co-PIs, 2009-2012 ($460,487).
  • NSF-CBET, “ Collaborative Research: Effects of exopolymeric substances (EPS) on engineered nanoparticle (EN) into marine phytoplankton cells”, Peter H. Santschi, PI, Kathleen A. Schwehr, and Antonietta Quigg, co-PIs, 2009-2012 ($248,158).
  • NSF-MRI-R2, “Acquisition of instruments to facilitate and enhance education and research on marine ecosystems at TAMUG”, Jay Rooker, Peter H. Santschi, and Antonietta Quigg, co-PIs, 2010-1011 ($383,127).
  • DOE-SBR, “Plutonium Speciation and Mobility through the Subsurface Environment: Nature of Organic Colloidal Carriers”, Santschi, P.H., PI, Schwehr, K.A., Hatcher, P.G., co-PIs, 2011-2014 ($660,128).
  • DOE-SBR, “Collaborative Research: The Importance of Organo-Iodine and Iodate In Iodine-127,129 Speciation, Mobility and Microbial Activity in Groundwater at DOE Sites”,  Santschi, P.H., PI, Brinkmeyer, R., Schwehrk, K.A., Kaplan, D.I., and Yeager, C.M., co-PIs 2011-2014 ($671,819 to TAMUG).


  • Professor, Oceanography, Texas A&M University-Galveston, 1988-present.
  • Head, Isotope Geochemistry and Radiology Section, Swiss Institute for Water Resources and Water Pollution Control, 1983-1988.
  • Adjunct Research Scientist, Lamont-Doherty Geological Observatory, Columbia University, 1983-1988.
  • Senior Research Scientist, Research Scientist and Associate Research Scientist, Lamont-Doherty Geological Observatory, Columbia University, 1981-1982, 1977-1981, 1976-1977, respectively.

Articles in Quarterdeck

  • The Laboratory for Oceanographic and Environmental Research at Texas A&M University in Galveston - Director
Geosciences TAMU Logo

Aggies can change the world. Geoscientists lead the way.