The influence of NAPL distribution on the transport of PFOS in Co-contaminated media

Liu，Hanle1,2; Guo，Zhilin3; Zhu，Yinxia1,2; Van Glubt，Sarah4; Brusseau，Mark L.4,5

2024-01-15

10.1016/j.jhazmat.2023.132794

Journal of Hazardous Materials   影响因子和分区

0304-3894

1873-3336

The objective of this research was to examine the influence of nonuniform NAPL distribution and hydraulic-conductivity heterogeneity on the retention and transport of PFAS. Two-dimensional flow cell experiments were conducted to investigate the impact of NAPL configuration on PFOS retention. Two simplified NAPL configurations were used, one with decane present as residual and the other with greater-than-residual (pool) NAPL saturation. The measured and predicted retardation factors were 1.7 and 1.6 for the residual-NAPL flow cell. The fractions of retention associated with solid-phase sorption, NAPL-water interfacial adsorption, and NAPL absorption were 0.56, 0.43, and 0.1, respectively. The measured retardation factor was 1.4 for the pool-NAPL flow cell. Notably, the predicted retardation factor assuming no contribution from NAPL-water interfacial adsorption was 1.5. Comparison of the two values indicates a minimal contribution of NAPL-water interfacial adsorption to transport, which is attributed to the impact of by-pass flow effects that limited contact of PFOS with the NAPL present within the pool. Mathematical-model simulations were conducted to examine the impact of heterogeneity on PFOS transport in model NAPL-contaminated heterogeneous source zones. The results demonstrated that the impact of NAPL-water interface adsorption on PFAS transport in NAPL-contaminated source zones can be influenced by the magnitude of hydraulic-conductivity heterogeneity.

Hydraulic accessibility Interfacial adsorption PFAS Source zone configuration

SCI ; EI

英语

其他

ENGINEERING

2-s2.0-85174734620

Scopus

1.Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin University of Technology,Guilin,China
2.Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area,Guilin University of Technology,Guilin,China
3.Southern University of Science and Technology,Shenzhen,China
4.Environmental Science Department,University of Arizona,Tucson,United States
5.Hydrology and Atmospheric Sciences Department,University of Arizona,Tucson,United States

Liu，Hanle,Guo，Zhilin,Zhu，Yinxia,et al. The influence of NAPL distribution on the transport of PFOS in Co-contaminated media[J]. Journal of Hazardous Materials,2024,462.

Liu，Hanle,Guo，Zhilin,Zhu，Yinxia,Van Glubt，Sarah,&Brusseau，Mark L..(2024).The influence of NAPL distribution on the transport of PFOS in Co-contaminated media.Journal of Hazardous Materials,462.

Liu，Hanle,et al."The influence of NAPL distribution on the transport of PFOS in Co-contaminated media".Journal of Hazardous Materials 462(2024).