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Group: former

Mia Riddley

Student [ENV E]

Mia is an Environmental Engineering major who is interested in water - chemistry, contaminants, and inhabitants.

Tamara McConnell

Student [GEOL]

Tamara is a Geology major who is currently working with anoxic sediments - their handling, extraction, and analysis for mineralogy and speciation analysis.

Timm Bayer

Research Assistant, University of Tübingen

Timm worked to constrain the Fe isotope fractionation that occurs during Fe(II) oxidation in the presence of oxygenic photosynthetic cyanobacteria. Funding: Carl Zeiss Stiftung

Marina Wüstner

Research Assistant, University of Tübingen

Marina tested how Fe(II) is oxidized by oxygenic photosynthetic bacteria, and worked to isolate cyanobacteria from the photic zone of a seasonally anoxic and ferruginous lake in northern Germany. Funding: Carl Zeiss Stiftung

Markus Maisch

Masters Student University of Tübingen, visited Iowa State University Sept.-Dec. 2015

Markus optimized a flow-through column for use in laboratory-scale simulations of an upwelling system from ferruginous deep oceans that were present in the Archean and Proterozoic. He is currently a PhD student at the University of Tuebingen. Funding: Carl Zeiss...

William McNamara

BS Chemical Engineering '16, Iowa State University

William built and maintained microelectrodes in the lab, and generated our voltammetric sulfide calibration curve. He is now employed as an Environmental Specialist within the Iowa Department of Natural Resources’ Air Quality Bureau.

Dr. Wenfang Wu

Postdoctoral Scholar/Visiting PhD student, University of Tübingen

Wenfang was determining the quantitative contribution of cyanobacteria and photoferrotrophs to Fe(II) oxidation in ferruginous oceans using a laboratory-scale analogue of an upwelling system. She is now teaching physics in English for grades 10 and 11 at the Beijing 21st...

Dr. Sümeyya Eroglu

PhD Student University of Tübingen, visited Iowa State Jan.-July 2016

Sümeyya investigated the Fe speciation, concentration, and isotope composition of shallow-water carbonates from the 2.58 to 2.50 Ga Malmani and Campbellrand carbonate platform preserved in South Africa. She also used Carbon, Oxygen, and Molybdenum isotopes to investigate the redox history...

Dr. Maximilian Halama

PhD Student, University of Tübingen

Max worked to define the minerals produced during thermochemical Fe(III) reduction in sediments, relavant to origin of banded iron formation (BIF) mineral assemblages. He also performed experiments related to preservation of elemental signatures sorbed to Fe(III) (oxyhydr)oxides during diagenesis, and...

Annie Drahos

Undergraduate Student, Iowa State University

Annie is an expert phycologist who helped us to identify phytoplankton from Iowa lakes with traditional light microscopy, in order to validate the use of in vivo fluorescence techniques to monitor the composition of HAB. Funding: Iowa Water Center

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