Fall 2021 Environmental Biogeochemistry (EBL) Group

Front row (from left): Katelyn Gray, Sarah Tuoni, Chris Townsend, Christy Agegaye
Behind row (from left): Deb Jaisi, Spencer Moller, Himal Acharya, Tony Hollenback, Yuriy Sakhno

Principal investigator

Dr. Deb Jaisi
Email: jaisi(AT)
Professor of Environmental Biogeochemistry

1. Postdoctoral associates and visiting scientists
Dr. Yuriy Sakhno
Email: yshakno(AT)
Project: Synthesis of apatite and ion doping
Dr. Katelyn Gray
Email: graykat(AT)
Project: Phosphorus cycling at salinity gradient
Dr. Lisa Stout (visiting scientist)
Email: lstout(AT)
Project: Mineralization of organic P by bacteria

2. Graduate and  undergraduate students
Spencer Moller
Email: smoller(AT)
Glyphosate degradation and fate; method development
Tony (Anthony) Hollenback
Email: tonyh(AT)
Stereo-transformation of inositol phosphate; method development
Christy Adegaye
Email: adechris(AT)
Phosphorus sources and cycling in DE watershed
Himal Acharya
Email: himalach(AT)
Phosphorus flux at the sediment-water interface
Sarah Tuoni
Undergraduate researcher
Christopher Townsend
Undergraduate researcher

B. Past laboratory members

Postdoctoral associates:

1. Dr. Mingjing Sun (2015-19), Currently: Associate Professor, Emporia State University, KS
2. Dr. Jiying Li (2015-16), Currently: Assistant Professor, Hong Kong University of  Science and Technology, Hong Kong
3. Dr. Kevin (Dengjung) Wang (2014-16). Currently: Assistant Professor, Auburn University, AL
4. Dr. Avula Balakrishna (2014-15), Currently: Associate Professor and Chair, Rajeev Gandhi Memorial College of Engineering & Technology, India
5. Dr. Sitindra Dirghangi (2013-14), Currently: Senior Scientist, HSBC, India
6. Dr. Wei Li (2012-13), Currently: Professor, Nanjing University, China
7. Dr. Xioana Li (2012-13), Currently: Analytical laboratory manager, Montclair University, NJ

Graduate students:

1. Gulcin Unal Tosun (PhD, 2016-21). Currently: Scientist at Chevron, Houston, TX
2. Qiang (Ted) Li (PhD, 2015-20), Currently: Postdoctoral Associate, Cornell University, Ithaca, NY
3. Hui Li (PhD, 2013-18), Currently: Assistant Professor, North Carolina State University, Raleigh, NC
4. Sunendra Joshi  (PhD, 2011-16), Currently: Postdoctoral Associate, University of Delaware, DE
5. Yuge Bai  (MS, 2014-16), Currently: Postdoctoral Associate, University of Tubingen, Germany
6. Kristi Bear (MS, 2014-16), Currently: Soil Scientist, USDA-ARS, UT
7. Kiran Upreti (MS, 2011-13), Currently: Scientist, IEH Laboratories and Consulting Group, Seattle, WA
8. Jiangqi Wu (MS, 2012-14), Currently: Soil Scientist, New Zealand Soil Survey, New Zealand
9. Margaret Musser (MS, 2018-20). Currently: Scientist, Brightfields Inc, Wilmington, DE
10. Jess Anton (MS, 2018-21). Currently: Scientist, PFAS Solutions, Newark, DE

Visiting students and scientists:

1. Dr. Guanglong Liu (visiting scientist, Aug 2018-Sep 2018), Professor, Huazhong Agricultural University, Wuhan, China
2. Dr. Hezhong Yuan (visiting scientist, Oct 2017-Nov 2018), Professor, Nanjing Institute of Science and Technology, Nanjing, China
3. Dr. Yu Wang (visiting scientist, Oct 2017-Dec 2017), Associate Prof, Institute of Soil Sciences, Chinese Academy of Sciences, Nanjing, China
4. Hamed Arfania (visiting graduate student, May 2017-Feb 2018). Urmia University, Iran
5. Xiaolu Li (visiting graduate student, Nov 2019- Jul 2021). Huazhong Ag University, China
6. Zhaohua Jiang (visiting graduate student, Dec 2019- Dec 2020). Xiamen University, China

Undergraduate students:

1. Kelsey McCullough (Undergraduate intern, 2017-18), Currently: Environmental company, DE
2. Tristum Williams (Undergraduate EPSCoR Intern, 2016), Currently: Undergrad student, Florida A&M University, FL
3. Ashley Deny (Undergraduate EPSCoR Intern, 2015), Currently: —
4. Ha Vu (Undergraduate EPSCoR Intern, DENIN Fellow 2014-16), Currently: Chemist, UFloor System, Dover DE
5. Awet Negusse (Undergraduate Intern, 2014), Currently: Chemist, Evans Analytical Group, MD
6. Thanh T. Nguyen (Undergraduate EPSCoR Intern, 2013-14), Currently: PhD student, Delaware State University, DE
7. Michael Scharf (Undergraduate Intern, 2012-13), Currently: MS student, University of Scranton, PA