Lab Members

Marta Venier, PhD – Principal Investigator

Dr. Marta Venier is an environmental chemist and assistant professor at the Paul O’Neill School of Public and Environmental Affairs at Indiana University in Bloomington, Indiana. In her research she employs analytical chemistry and mass spectrometry techniques to study the fate, transport, and behavior of persistent organic pollutants including both legacy and emerging pollutants in the indoor and outdoor environment and in consumer products. Since November 2019, she has been leading the Integrated Atmospheric Deposition Network (IADN), a monitoring program funded by the U.S. Environmental Protection Agency.

Marta moved to the U.S. from Italy in 2004 and she is a first generation PhD. She brought with her a deep love for food, languages, and beauty. She loves cooking, hiking, and traveling with her husband and their two daughters.

Karen Arnold – Senior Technician

Karen grew up in a small town in central Indiana. She graduated in 1989 from IU-Kokomo with a B.S. in Biological and Physical Sciences. Karen worked for 5 years in the chem lab doing real time analysis for the melt shops at Haynes International. Her time at Haynes International consisted of X-ray fluorescence, optical omissions, atomic absorption, induced coupled plasma, LECO testing for carbon, nitrogen, oxygen and sulfur, and corrosion testing of the Hastelloy brands. She relocated to southern Indiana in 1994 after meeting her husband.

Karen began working on the Integrated Atmospheric Deposition Network (IADN) in 1995. She has over 28 years experience with PCB and pesticide analysis. She has spent a lot of time during those 28 years with GC instruments, making her the GC guru in the lab. Karen earned a master’s degree from IU-Bloomington in 2014.
In her free time, she enjoys spending time with her family—especially her grandchildren—whether outside driving their cars, shooting Nerf guns, playing with the water table, or swimming.

Jim Bays – Field Technician

Jim joined the Integrated Atmospheric Deposition Lab in 2005. He earned his undergraduate degree in anthropology and biology from Ball State. Outside of the lab, Jim is a passionate gardener.

Daniel Lehman – Data Manager

Daniel grew up in northern Indiana. He received a BS and MS in Environmental Sciences from IU - Bloomington. He joined the IADN Lab in 2015 in the role of data
manager.

Previous research experience includes soil biogeochemistry focused on mycorrhizal influence on carbon and nitrogen cycles, and the biogeochemistry of Mars analogue environments. Daniel and his family spend their time on a hobby-farm where they raise Alpine dairy goats, chickens, and an assortment of other furry and feathered creatures.

Kevin Romanak – Specialty Technician

Kevin Romanak grew up in Winfield, Ind., a small township near Crown Point. He moved to Bloomington in 2006 and fell in love with its natural beauty, the feeling of community, and how easily bikeable it is. He received his BS in 2010 in Environmental Sciences and his MS in Environmental Sciences in 2014. He joined the IADN team in 2011 and currently he is in charge of per- and polyfluoroalkyl substances (PFAS) analyses in air and precipitation as well as other special projects. Kevin loves a good problem to solve.

Aside from research, Kevin has a desire for learning/teaching, creating, and volunteer service. He is an Emergency Medical Technician and helps teach those classes at IU. He is a certified Wilderness First Responder and is Level III cave rescue certified with National Cave Rescue Commission. He is a representative for his local neighborhood community, engaging in discussions and solutions for housing and development as well as tree planting initiatives and neighborhood cleanups. He is also the treasurer of the local caving organization, Bloomington Indiana Grotto. In his spare time, Kevin enjoys building, painting, and woodworking and absolutely loves the outdoors including caving, kayaking, and diving.

Stephen Zulkowski – Laboratory Technician

Stephen spent most of his formative years growing up in the post-industrial/agricultural landscape of northern Indiana, which inspired his interest in environmental affairs.

He earned BAs in Biology and History from IU-Bloomington, and worked in Japan where he was a high school English language teacher for several years.

After immigrating back to the U.S., he worked as an analyst and technician in petroleum analysis and pharmaceutical manufacturing industries before joining the IADN team in 2015. He assists with sample preparation and pesticide data analysis for the IADN program.

He is currently a graduate student at the O'Neill School studying environmental policy and natural resource management. In his free time, he enjoys playing chess, reading, and listening to classical music.

Chunjie Xia – Post-Doctoral Associate

Chunjie Xia, originally from China, has a bachelor's and PhD in Chemical Engineering. He embarked on his academic journey at Southern Illinois University Carbondale (SIUC), where he began as a postdoctoral research sssociate in February 2015.

He continued his research at SIUC, pursuing another PhD degree in Environmental Engineering commencing in January 2018. His research mainly focuses on per- and polyfluoroalkyl substances (PFAS) photocatalytic degradation using nanoscale zero-valent iron for water reuse.

Prior to completing his doctoral studies at SIUC, Chunjie joined the Venier Lab in March 2021 as a postdoctoral research associate, joining the IADN team. He also works on developing PFAS analyses in consumer products such as kids’ products and fast-food packaging materials, aiming to elucidate potential exposure pathways of PFAS to human health in daily life contexts. In his work he employs LC-MS/MS and GC-MS.

When not in the lab, he spends time with his wife and two daughters.

Abdul Qadeer - Post-Doctoral Associate

Abdul Qadeer, who goes by Dr. AQ, earned a PhD in Environmental Geography, focusing on environmental contaminants, fate, and risks. Since 2013, he's been studying legacy and emerging pollutants, especially Persistent Organic Pollutants (POPs). His main research interests include the multiphase transfer of contaminants, food web dynamics, and risks. He also looks into how global changes and climate change relate to contaminants’s fate and risks.

Dr. AQ joined the Venier Lab to work on the role of dermal absorption in the human exposure to chemicals, in particula for navy divers.

Due to his exceptional research achievements, he was honored with the prestigious Best Research Award from East China Normal University in 2019. He has published more than 50 articles.

Dr. AQ loves farming, music/singing, and sports (hockey, cricket, boxing, and gym).

Sydney Brady – PhD Student

Sydney grew up in Hawaii but has spent the last handful of years of Indiana.

She earned her B.S. degree in Environmental Science with a minor in Constitutional Studies from the University of Notre Dame in 2021, where her time was spent researching biogeochemical cycling and playing club rugby.

Sydney joined the Venier Lab in the fall of 2021, and her research currently focuses on chemical pollution in biota. Specifically, she has researched flame retardants, polychlorinated biphenyls, pesticides, and PFAS in avian serum, fish, and wildlife feces.

When not in the laboratory, Sydney enjoys long-distance running, reading, and gardening.

Ozlem Sadik - PhD Student

Ozlem earned her bachelor's and master’s degrees in Chemistry from Türkiye. Formerly, she worked for the Atmospheric Deposition Network (IADN) project from 2012 to 2015.

In 2023, she began her PhD in the Environmental Science program in the Venier group. Her research interests revolve around understanding the fate and trends of organic pollutants. Currently, she is delving into the investigation of Organophosphate Esters (OPEs) in air samples.

Outside of the laboratory, she finds joy in discovering new places, experimenting with various cuisines, and learning new things.

Yaw Essandoh - PhD Student

Yaw is a final year master's student in the environmental science program. Hailing from Ghana, he completed his undergraduate studies in Laboratory Technology, with a Chemistry major, at the University of Cape Coast.

Yaw joined the Venier Lab in the fall of 2022 to pursue his master's degree. His current research focuses on the use of silicone wristbands as a tool to assess personal exposure to persistent organic pollutants (POPs) such as current-use pesticides (CUPs), organochlorine pesticides (OCPs), and polybrominated diphenyl ethers (PBDEs).

Outside of the laboratory, Yaw enjoys spending time outdoors, playing soccer, and expressing his musical talents through playing instruments like the drums.

Liam Green – Research Assistant

Liam recently earned his B.S. in Environmental Science from IU. During his undergraduate studies, he conducted his senior honors thesis in the Venier Lab, investigating patterns of organochlorine pesticide (OCPs) and brominated flame retardant (BFRs) exposure in various primate species in Kibale National Park, Uganda.

Following graduation, he was hired as a research assistant to continue his work studying organic pollutant exposure in wildlife while also contributing to various other lab projects. Liam recently accepted a position in the graduate program at William and Mary's Virginia Institute of Marine Science, where he will delve into research concerning microplastics, their additives, and their impacts on marine ecosystems.

In his free time, Liam enjoys reading nerdy fantasy books, running, and playing board games with friends.

Paulina McIntire – Undergraduate Research Assistant

Paulina is a current student at IU, studying Environmental Science with minors in Chemistry and Biology. She became interested in environmental chemistry due to her success in chemistry and interest in the outdoors during high school, joining the Venier Lab in fall 2023.

As an undergraduate research assistant and glassware technician, she ensures that the lab runs smoothly by preparing its glassware and tools for use and is always willing to help any lab member who asks.

As a member of the O’Neill Honors Program, Paulina will soon start her own research project in Dr. Venier's lab in the coming semesters. You can find her in the lab listening to audiobooks or Taylor Swift. She loves to hike, cook, craft, and work with plants outside of the lab.

Cooper Sykes - Undergraduate Research Assistant

Cooper (he/him), originally from Cary, North Carolina, is a 2024 IU graduate with a Bachelor of Arts in Environmental and Sustainability Studies, a Bachelor of Science in Geography, and minors in German and Water Resources Science, Policy, and Management.

Cooper joined the Venier Lab in fall 2021, first as an undergraduate research volunteer before becoming the lab's mapmaker as an undergraduate research assistant in spring 2022. His research interests include cartography, the geospatial sciences, remote sensing, critical GIS, environmental contaminants, PFAS, climate change, and environmental justice.

When not making maps, Cooper loves listening to classical music, playing saxophone, and going on walks.

Sarah Schwam - Undergraduate Research Assistant

Sarah is an undergraduate student at IU studying Nonprofit Management and Leadership with a minor in Sociology.

She joined the IADN team in the fall 2024 and she works with Daniel Lehman, the data manager, to analyze, recover, and organize data collected from the 1990s to present. Sarah is excited to learn more about data management, because she is intrigued by the limitations America's nonprofit sector faces and hopes to address the challenges faced through researching the sector.

Sarah hopes to eventually work at a think-tank or become a professor, so that she can bring her research to life. She is president of the Nonprofit Leadership Alliance-IU, where she is getting students across campus certified to run a nonprofit through the NLA; she is an active member of the Alpha Phi Omega Service Fraternity; and she enjoys volunteering with youth service organizations.

Faith Stimson - Undergraduate Research Assistant

Faith is an undergraduate at IU Bloomington and is currently pursuing a double major in Biochemistry and Spanish.

She joined the Venier Lab in spring 2024 as an undergraduate research assistant. She's also involved in the IU Journal of Undergraduate Research, as well as being an undergraduate tutor for Writing Tutorial Services on campus.

In her free time, she likes to cook, try new restaurants, read, and go on walks.

Quinn Bright - Undergraduate Research Assistant

Quinn is a rising senior on the premedical track, studying Biochemistry with minors in Social Science and Medicine and Healthcare Management and Policy. Quinn also works as a scribe in the Emergency Department at IU Health Bloomington Hospital and as an undergraduate tutor for the chemistry department.

He joined the Venier Lab in spring 2024.

When not working, he enjoys taking road trips, playing intramural sports, and napping with his dogs.

Caden Smith – High School Volunteer

Caden was born in and grew up in Bloomington. He is a fourth-generation IU student continuing the legacy of his great-grandmother starting in 1929. He is a rising freshman majoring in Environmental Science through the O’Neill School as well as the College of Arts and Sciences.

He hopes to assist in research relating to toxic pollutants within consumer products and different species of animals, then apply this knowledge to legislative matters.

When not in the lab Caden enjoys art, running, and thrifting.