Regeneration of PFAS-laden granular activated carbon by modified supercritical CO2 extraction DOI
Tatiana Didenko,

Almond Lau,

Anmol L. Purohit

et al.

Chemosphere, Journal Year: 2024, Volume and Issue: 370, P. 143986 - 143986

Published: Dec. 23, 2024

Language: Английский

Investigating hydrodynamic cavitation as an efficient means for removal of per- and polyfluoroalkyl substances from solution DOI Creative Commons
Shervin Kabiri, Mehdi Jafarian, Divina A. Navarro

et al.

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 347, P. 127644 - 127644

Published: April 24, 2024

Language: Английский

Citations

1
Hydrothermal Destruction and Defluorination of Trifluoroacetic Acid (TFA) DOI Creative Commons
Conrad Austin, Anmol L. Purohit,

Cody Thomsen

et al.

Published: Nov. 15, 2023

Per- and polyfluoroalkyl substances (PFAS) have received increased attention due to their environmental prevalence threat public health. Trifluoroacetic acid (TFA) is an ultra-short-chain PFAS the simplest perfluorocarboxylic (PFCA). While US EPA does not currently regulate TFA, its chemical similarity other PFCAs simple molecular structure make it a suitable model compound for studying destruction of PFAS. We show that hydrothermal processing in compressed liquid water degrades TFA at relatively mild conditions (T = 150 – 250 ˚C, P < 30 MPa), initially yielding gaseous products, such as CHF3 CO2, naturally aspirate from solution. Alkali amendment (e.g., NaOH) promotes mineralization CHF3, dissolved fluoride, formate, carbonate species final products. Fluorine carbon balances are closed using Raman spectroscopy fluoride ion selective electrode measurements experiments performed alkaline conditions, where gas yields negligible. Qualitative FTIR analysis allows establishing degradation pathways; however, F-balance could be quantitatively without NaOH amendment. The kinetics under measured, showing little no dependency on concentration, indicating thermal decarboxylation rate-limiting step. A proposed mechanism motivates additional work generalize reaction pathways PFCAs.

Language: Английский

Citations

2
Investigating High Shear Cavitation as an Efficient Means for Removal of Per- and Polyfluoroalkyl Substances from Solution DOI

shervin kabiri,

Mehdi Jafarian, Divina A. Navarro

et al.

Published: Jan. 1, 2024

Language: Английский

Citations

0
Regeneration of PFAS-laden granular activated carbon by modified supercritical CO2 extraction DOI
Tatiana Didenko,

Almond Lau,

Anmol L. Purohit

et al.

Chemosphere, Journal Year: 2024, Volume and Issue: 370, P. 143986 - 143986

Published: Dec. 23, 2024

Language: Английский

Citations

0