Laodong Guo's Research Outline

Ms. Zhengzhen Zhou

Ph.D. Student

Department of Marine Science

University of Southern Mississippi

1020 Balch Blvd.

Stennis Space Center, MS 39529

E-mail: Zhengzhen.Zhou@usm.edu

228-688-1497 (Lab)

228-688-1901 (Office)

228-688-1121 (Fax)

Education:

Graduate Student. 2007-present: Marine Science, University of Southern Mississippi

B.S. 2007. Marine Chemistry, Xiamen University, Xiamen China,

Research Interests:

Biogeochemical cycles of dissolved organic matter, trace elements in riverine, estuarine and oceanic environments.

Colored-DOM, aquatic colloids and nanoparticles, interations of trace elements (Th and Fe) with natural organic matter and nanoparticles using radiotracers

Lab techniques:

Flow field-flow fractionation, cross-flow ultrafiltration, radiotracers, fluorescence Excitation Emission Matrix (EEM), UV-vis spectrophotometry, gamma spectrometry, scintillation counter etc.

Experience:

2007-Present: Graduate research and teaching assistant

Marine Science, University of Southern Mississippi

2003-2007: Undergraduate student at Xiamen University

Publications/Presentations:

Zhou, Z., Ke , C, Lin, T., Wang, D., and Shen. M. 2007. Comparative Study on Radula of Babylonia from Different Populations,, Journal of Xiamen University, (Natural Science ), 46(z1): 45-52.
Zhou, Z., Stolpe, B. and Guo, L. 2009. Composition and size spectra of CDOM in the Mississippi River and Pearl River: a comparative study. 2009 Northern Gulf Institute (NGI) Annual Meeting, May 20-21, 2009, Mobile, Alabama.
Zhou, Z., Stolpe, B. and Guo, L. 2009. Composition and size distribution of colored dissolved organic matter (CDOM) in natural waters as characterized using fluorescence EEM and flow field flow fractionation techniques. 2009 Mississippi Water Conference, August 5-7, 2009, Tunica, Mississippi.
Zhou, Z. Seminar speaker in the Department of Marine Science, University of Southern Mississippi, September 18, 2009.
Zhou, Z. and Guo, L. 2010. Variations in composition and size of dissolved and colloidal organic matter in the Bay of Saint Louis estuary. 2010 Goldschmidt Conference in Knoxville, Tennessee, June 13-18, 2010, Geochim. Cosmochim. Acta, 74 (12A), suppl., A1231.
Diercks, A.R., R.C. Highsmith, V.L. Asper, D.J. Joung, Z. Zhou, L. Guo, A.M. Shiller, S.B. Joye, A.P. Teske, N. Guinasso, T. L. Wade & S.E. Lohrenz. 2010. Characterization of subsurface polycyclic aromatic hydrocarbon at the Deepwater Horizon site. Geophysical Research Letters, 37, L20602, 6 PP, doi:10.129/2010GL045046.

Research Projects:

	Using UV-vis spectrophotometer to measure DOM optical proporties
I use cross-flow ultrafiltration to isolate aquatic colloids with sizes between 1 kiloDalton (kDa) and 0.45 micron
	I also use flow field-flow fractionation techniques (left) in my thesis research , working with Dr. Bjorn Stolpe in Guo’s Lab.(below).
I collect monthly samples from the Mississippi River, one of the largest world rivers, and the Pearl River, a small forested, black water river in Mississippi.

Guo’s Lab

Department of Marine Science

University of Southern Mississippi

Xiamen University