ISIAQ STC 11 (Sources, Monitoring and Evaluation: Chemical Pollutants) have hosted webinars to increase communication within the STC11 and expanding our outreach. The upcoming webinar will be on the topic of “Assessment of exposures to indoor pollutants”. Below is the webinar information. Please mark your calendar and join us to learn more!
Date: December 5th, 2019 • 9:00‐10:00 am. U.S. Eastern Standard Time
Outlines: One joint presentation (40 minutes) and Discussions (20 minutes)
Presentation: Assessing Human Exposure to Chemicals in Materials, Products and Articles: A Modular Mechanistic Framework
Abstract: A modular mechanistic framework will be described for predicting chemical emissions from indoor sources, partitioning among indoor compartments and exposure to humans, focusing initially on semivolatile organic compounds (SVOCs). The framework has been developed in a process aimed at achieving consensus regarding what is currently known about SVOC behavior indoors.
For the framework, we summarize important assumptions and their impacts, mechanistically consistent source emission categories, relevant environmental compartments, congruent exposure pathways and their respective modeling approaches. Source emission categories include solid, soft, frequent contact, applied, sprayed and high temperature sources. Indoor environmental compartments are the gas phase, airborne particles, settled dust, sink surfaces and clothing. Reasons for uncertainty and limitations of the framework are discussed, emphasizing the need for further research in some areas. The modular structure of the framework allows subsequent inclusion of new research findings, other chemical classes of indoor pollutants and additional mechanistic processes relevant to human exposure indoors. The framework may serve as the foundation for the development of an open‐source community model that can be used to guide research and implement policies.
To highlight how the framework can be utilized, an example scenario and the associated workflow that leads to exposure estimates will be given, which in turn can be used in combination with toxicity data to assess chemical risk.
Dr. John Little is the Charles E. Via, Jr. Professor in the Department of Civil and Environmental Engineering at Virginia Tech. His primary research interests are cross‐media mass transfer and process dynamics in environmental systems, currently focusing on understanding and controlling chemical emissions from building materials and consumer products and managing water quality in lakes and reservoirs. An emerging area of interest is the management of complex socio‐environmental problems
using a system‐of‐systems modeling and data science framework.
Ms. Clara Eichler studied Environmental Engineering at the Technical University in Berlin, Germany. Since January 2016, Clara works as a Research Associate in the Department of Civil and Environmental Engineering at Virginia Tech. Her research interests are exposure assessments of chemicals present in consumer products and particularly the emission and transport of semivolatile organic compounds (SVOCs) in the indoor environment.