Director/Program Coordinator: MS Environmental Science Program
Graduate Advisor: Hydrology Option - MS Environmental Science Program
General Education Assessment Coordinator and member of the Campus Assessment Team
College Assessment Coordinator: College of Natural And Social Sciences
Co-chair of IT Subcommittee and Member of University Quarter to Semester Steering Committee
Acting Department Chair (Winter 2015)
Associate Department Chair (Summer 2013 - Spring 2016)
Graduate Advisor (MS Geology)
Undergraduate Advisor (BS Geology: Option in Environmental Geosciences)
Chair: Academic Information Resources Sub-committee
Chair: Educational Policy Committee - Academic Senate
Advisory Board: Center for Effective Teaching and Learning
Howard Huges Medical Institute (2018) - Inclusive Excellence Initiative
Role: Project Director Amount Awarded: $1,000,000
National Science Foundation (2018): 2018 CSU-LSAMP Bridge to the Doctorate at California State University, Los Angeles (Cohort 15)
Role: Co-PI Amount Awarded: $1,075,000
National Science Foundation (2016): 2016 CSU-LSAMP Bridge to the Doctorate at California State University, Los Angeles (Cohort 13)
Role: Co-PI Amount Awarded: $1,075,000
National Science Foundation (2015): 2014 CSU-LSAMP Bridge to the Doctorate at California State University, Los Angeles (Cohort 12)
Role: Co-PI Amount Awarded: $987,000
CSU Chancellors Office (2014): Promising Practices- Redesign Geol 150 Earth Revealed
Role: PI Amount Awarded: $18,997
Doctoral Degree (University of Texas at El Paso)
Alejandro Villalobos-Aragon – Ph.D. May 2009
Title: Using chromium stable isotopes to monitor chromium reactive transport: oxidation
Experiments and field studies
Jeffery Langman – Ph.D. December 2008
Title: A multi-tracer study of saltwater origin, cross-formational flow, and the geochemical evolution of groundwater in the Southern High Plains aquifer along the Western Caprock Escarpment, east-central New Mexico
Abdul Aziz M. – Ph.D. Co-chair with Dr. Diane Doser: December 2007
Title: Effects of land use on water resources in the Nile Delta-Egypt.
*Xie Xianjun – Ph.D. *International Co-Advisor, China University of Geosciences - faculty at CUG.
MS Thesis/Project Students
Supasiri Rittiron: MS Geology- Thesis. Supasiri (Mos) studies the impact of wildfires on sediment/soil geochemistry and the potential for mobilization of metals.
David Yousavich: MS Geology- Thesis David studies mechanisms responsible for metal sequestration and removal by a rain garden constructed to reduce stormwater contamination from entering Ballona Creek in Culver City. David worked in collaboration with Karina Johnson of the Santa Monica Bay Restoration Committee and John Dorsey of Loyola Marymount University
Ricardo Lopez-Maldonado – MS Geological Science (general option)-Thesis: Thesis title “Carbonate Clumped Isotope Reconstruction of Temperatures And Water 18O/16O Ratios From Last Glacial Maximum And Holocene Climatic Optimum Age Calcic Paleosols In The Palouse Loess (Washington, USA).” Ricardo conducted this study in collaboration with Aradhna Tripati at UCLA.
Kenisha Shipley – MS Environmental Science (Env-Hydrology Option)-Thesis. Kenisha was an LSAMP Bridge to Doctorate Fellow and studied the controls on arsenic sources and mobilization surface and ground waters around Mammoth Mountain, CA.
Ngoc Luu - MS Geology - Thesis: Ngoc studied long-term changes in the geochemistry of the two lakes in Mammoth Lakes, CA to determine effects of seasonal variations over a 4 year period.
Kimberly Henry: MS Geology - Project. Water Quality of the San Gabriel River at Whittier Narrows Nature Center - seasonal controls
Jwan Amin: MS Geology - Project. Water Quality of the San Gabriel River at Whittier Narrows Nature Center - short-term and seasonal controls on water quality
Sean Bowen: MS Geology - Project. remediation strategies to clean up a gasoline contaminated site: 1-D modeling and predictive analyses.
Dalia Ahmed: MS Geology - Project. Seasonal Controls on water Chemistry of the Upper San Gabriel river
Chaemi Lee: MS Geology - Project. Sulfur and Sulfur isotopes in the Upper San Gabriel river
Erum Razzak – MS Environmental Science (Env. Hydrology Option) - Thesis: Erum examined the effects of tidal gates and urban run-off on a coastal wetland and related restoration efforts. Erum worked in collaboration with Karina Johnson of the Santa Monica Bay Restoration Committee and John Dorsey of Loyola Marymount University
Karina Hunt – MS Environmental Science (Engineering option) - Thesis: As a CEaS Fellow, studied the trace-element and arsenic geochemistry of springs in Mammoth Lakes, CA
Samuel Raskin – MS Geology - Thesis: As a CEaS Fellow, Samuel studied the geochemistry and isotope geochemistry of groundwater and springs in Mammoth Lakes, CA.
Rosie Santilena – MS Geology - Thesis: On a CEaS Fellowship, Rosie studied the geochemistry of Horseshoe Lake, a sub-project of the CEaS Carbon sequestration component.
Swati Joshi – MS Environmental Science - Thesis: Swati funded on my NSF grant worked on developing Cr stable isotopes to monitor fate and geochemical transformation of toxic chromium in natural waters.
Shauna Davis – MS Geology-Project: Shauna worked on using river geochemistry as an indicator of permafrost degradation in Alaska. Currently employed at Arcadis.
Caitlin Dwyer – MS Geology - Thesis: Caitlin was awarded a fellowship by the new Center for Energy and Sustainability (CEaS). She completed a study on the potential effects of elevated carbon dioxide concentrations on water quality at Mammoth Mountain, CA. The site is being used as a natural analogue for a carbon sequestration site. Currently employed at SLR Consulting.
Christiane Ortega – MS Geology - Thesis: Christiane evaluated an in-situ chemical treatment of toxic hexavalent Cr in groundwater using calcium poly sulfide. She conducted a suite of geochemical analyses to determine the effectiveness of the remediation technology employed. Currently employed at URS Corp.
David Wang: David was an undergraduate Biochemistry major and lead researcher on my NSF-funded project on Cr isotopes. David completed a Ph.D. in the MIT-WHOI Joint Doctoral Program and is currently at Exxon-Mobil.
Diana Fregoso: Diana was working alongside David Wang on the chromium project.
Adriana Caire Adriana worked alongside Swati Joshi on the chromium project.
Jessica Roethe: Jessica worked alongside Swati Joshi on the chromium project.
Jocelyn Luna: Jocelyn worked with the CEaS group (Sam Raskin and Ngoc Luu) on the Mammoth Lakes Carbon Dioxide Project.
- Xiangli Wang, Thomas M. Johnson, Andre S. Ellis, (2015) Equilibrium isotopic fractionation and isotopic exchange kinetics between Cr(III) and Cr(VI), Geochimica et Cosmochimica Acta, 153, v15, 72-90
- Ricardo Medina, G.B. Menezes, C.S. Khachikian, and A. Ellis (2015) Use of Fly Ash as Soil Amendment to Offset Anion Exclusion Effect on Nitrate Transport. Vadose Zone Journal, v. 14
- Helen Sanchez, Gustavo Menezes, Andre Ellis, Claudia Espinosa-Villegas, and Crist Khachikian, (2014) Laboratory Investigations of Weathering of Soils from Mammoth Mountain, CA, a Naturally CO2-Impacted Field Site. Environmental Science & Technology 48 (20), 12056-12062
- Yanxin Wang, Xianjun Xie, Thomas M. Johnson, Craig C. Lundstrom, Andre Ellis, Xiangli Wang, Mengyu Duan, Junxia Li (2014) Coupled iron, sulfur and carbon isotope evidences for arsenic enrichment in groundwater. Journal of Hydrology, Volume 519, Part A, 27 November 2014, Pages 414-422
- Xianjun Xie, Yanxin Wang, Andre Ellis, Chongxuan Liu, Mengyu Duan, Junxia Li (2014) Impact of sedimentary provenance and weathering on arsenic distribution in aquifers of the Datong basin, China: Constraints from elemental geochemistry, Journal of Hydrology, Volume 519, Part D, 27, Pages 3541-3549
- Xianjun Xie, Thomas M. Johnson, Yanxin Wang, Craig C. Lundstrom, Andre Ellis, Xiangli Wang, Mengyu Duan, Junxia Li. (2014) Pathways of arsenic from sediments to groundwater in the hyporheic zone: Evidence from an iron isotope study, Journal of Hydrology, Volume 511, 16, Pages 509-517
- Xianjun Xie, Thomas M. Johnson, Yanxin Wang, Craig C. Lundstrom, Andre Ellis, Xiangli Wang, Mengyu Duan (2013) Mobilization of arsenic in aquifers from the Datong Basin, China: Evidence from geochemical and iron isotopic data. Chemosphere. 9:6:1878-1884
- Xianjun Xie, Yanxin Wang, Andre Ellis, Chunli Su, Junxia Li, Mengdi Li, Mengyu Duan (2013) Delineation of groundwater flow paths using hydrochemical and strontium isotope composition: a case study in high arsenic aquifer systems of the Datong Basin, northern China. Journal of Hydrology. 476: 87-96
- Jeff B. Langman and Andre Ellis (2012) Geochemical indicators of interbasin groundwater flow within the southern Rio Grande Valley, southwestern USA. Environmental Earth Science.DOI 10.1007/s12665-012-1827-4.
- Alejandro Villalobos-Aragon, Andre Ellis, Maria, Aurora-Armienta, S. Morton and Thomas Johnson (2012) Geochemistry and Cr Stable isotopes of Cr-Contaminated Groundwater in Leon Valley, Guanajuato, Mexico. Applied Geochemistry.27(9): 1783-1794
- Andre Ellis, Thomas Johnson, Thomas Bullen, David Wang and Swati Joshi (2012) Cr Isotopes and Monitoring Fate and Transport of Cr–A Review. Proceedings of the XII International Symposium on Environmental Geotechnology, Energy and Global Sustainable Development, International Society for Environmental Geotechnology. 1:69-79
- Xianjun Xie, Yanxin Wang, Andre Ellis, Chunli Su, Junxia Li, Mengdi Li (2011) The sources of geogenic arsenic in aquifers at Datong basin, northern China: Constraints from isotopic and geochemical data. Journal of Geochemical Exploration.110(2): 155-166
- Christiane Ortega, Andre Ellis and Diana C. Fregoso (2010) Quantifying & Evaluating CPS Treatment to Remediate a Cr(VI) Contaminated site. Proceeding of the 6th Environmental Science and Technology Conference, American Academy of Sciences, Houston, TX, 2:39-44.
- Jeff B. Langman and Andre Ellis (2010). Geologic influences on source-water mixing along a paleochannel in the Southern High Plains aquifer, New Mexico. Carbonates and Evaporites, 25(3): 247-265.
- Alejandro Villalobos-Aragon, Andre Ellis, Maria, Aurora-Armienta and S. Morton (2010) “Chromium contamination in León valley, Guanajuato, México: a Cr stable isotope perspective”Water-Rock Interaction XIII. Editor(s): Peter Birkle and Ignacio Salvador Torres Alvarado. CRC Press.
- Jeff B. Langman and Andre S. Ellis (2010) “A multi-isotope (δD, δ18O, 87Sr/86Sr, and δ11B) approach for identifying saltwater intrusion and resolving groundwater evolution along the Western Caprock Escarpment of the Southern High Plains, New Mexico” Applied Geochemistry. 25(1):159-174.
- Xie Xianjun, Andre Ellis, Yanxin Wang (2009) “Redox Geochemistry and Sulfur Isotopes of Arsenic Contaminated Groundwater in Datong Basin, China” Science of the Total Environment. 407(12):3823-3835.
- Hyonjeong Noh, Youngsook Huh, Jianhua Qin and Andre Ellis (2009) “Chemical Weathering in the Three Rivers Region of Eastern Tibet.” Geochimica et Comochimica Acta, 73(7):1857-1877.
- Melissa Carney, Andre Ellis, Thomas Bullen and Jeff Langman (Accepted) “Geochemistry of Yukon and Copper River Tributaries, Alaska” Proceedings of the World Environmental and Water Resources Congress, American Society of Civil Engineers.
- Andre Ellis, J. Deluhery, and N. Rajagopalan (2005) “Effects of Organic and Metal Contamination On Etch Rate Of Acid Baths - Implications For Extended Acid Use.” Plating and Surface Finishing, 92(2):42-47.
- Andre Ellis, Thomas M. Johnson, and Thomas Bullen (2004) “Quantifying Cr(VI) Reduction and Lack of Chromium Stable Isotope Fractionation During Adsorption“ Environmental Science and Technology, 38: 3604-3607.
- Andre Ellis, Thomas Johnson, Mitchell Herbel and Thomas Bullen (2003) “Selenium Stable Isotope Fractionation in Unamended Sediment Slurries by Natural Microbial Consortia.”Chemical Geology, 195: 119-129.
- Andre Ellis, Thomas Johnson, and Thomas Bullen (2002) “Chromium Isotopes and the Fate of Hexavalent Chromium in the Environment” Science, 295: 2060-2062.