TY - GEN
T1 - Multiphysics Numerical Modeling of Transient Transport of PFAS
AU - Farid, Arvin
AU - Iradukunda, Pierrette
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.
PY - 2024
Y1 - 2024
N2 - Per-and polyfluoroalkyl substances (PFAS) are a group of very persistent chemicals, labeled forever chemicals, because of their indestructibility due to their strong C-F bond. PFAS are among emerging contaminants of high concern due to their widespread contamination in the geoenvironment. PFAS are mobile, toxic, manufactured chemicals with very stable molecules and, hence, persistent in the environment. The more persistent presence of PFAS in the vadose (i.e., unsaturated) zone of soil complicates their transport due to their adsorption onto the air–water interface. The micelles formation on the air–water interface can significantly increase the retention of PFAS during its transport and turn the vadose zone into a long-term source of PFAS, slowly releasing PFAS into groundwater. This paper describes the development and testing of a one-dimensional (1D) numerical model that simulates PFAS transport, accounting for diffusion, advection, solid-phase adsorption, and air–water interface adsorption. The code is one-way coupled with a transient seepage model to account for the seepage impact on the PFAS transport, but not vice versa). After testing, the numerical model was then used to study various scenarios to evaluate the impact of solid adsorption and micelle formation on the PFAS transport.
AB - Per-and polyfluoroalkyl substances (PFAS) are a group of very persistent chemicals, labeled forever chemicals, because of their indestructibility due to their strong C-F bond. PFAS are among emerging contaminants of high concern due to their widespread contamination in the geoenvironment. PFAS are mobile, toxic, manufactured chemicals with very stable molecules and, hence, persistent in the environment. The more persistent presence of PFAS in the vadose (i.e., unsaturated) zone of soil complicates their transport due to their adsorption onto the air–water interface. The micelles formation on the air–water interface can significantly increase the retention of PFAS during its transport and turn the vadose zone into a long-term source of PFAS, slowly releasing PFAS into groundwater. This paper describes the development and testing of a one-dimensional (1D) numerical model that simulates PFAS transport, accounting for diffusion, advection, solid-phase adsorption, and air–water interface adsorption. The code is one-way coupled with a transient seepage model to account for the seepage impact on the PFAS transport, but not vice versa). After testing, the numerical model was then used to study various scenarios to evaluate the impact of solid adsorption and micelle formation on the PFAS transport.
KW - Contaminant
KW - Fire suppression
KW - PFAS
KW - Wildfire
UR - http://www.scopus.com/inward/record.url?scp=85187638475&partnerID=8YFLogxK
U2 - 10.1007/978-981-99-9215-7_35
DO - 10.1007/978-981-99-9215-7_35
M3 - Conference contribution
AN - SCOPUS:85187638475
SN - 9789819992140
T3 - Lecture Notes in Civil Engineering
SP - 387
EP - 399
BT - Climate Change Adaptation from Geotechnical Perspectives
A2 - Hazarika, Hemanta
A2 - Haigh, Stuart Kenneth
A2 - Chaudhary, Babloo
A2 - Murai, Masanori
A2 - Manandhar, Suman
PB - Springer Science and Business Media Deutschland GmbH
T2 - 2nd International Conference on Construction Resources for Environmentally Sustainable Technologies, CREST 2023
Y2 - 20 November 2023 through 22 November 2023
ER -