TY - JOUR
T1 - Destruction of Perfluoroalkyl Acids Accumulated in Typha latifolia through Hydrothermal Liquefaction
AU - Zhang, Weilan
AU - Cao, Huimin
AU - Mahadevan Subramanya, Seshasayee
AU - Savage, Phillip
AU - Liang, Yanna
N1 - Funding Information:
The authors are grateful for financial support from the University at Albany, State University of New York, and China Scholarship Council.
Publisher Copyright:
© 2020 American Chemical Society.
PY - 2020/6/29
Y1 - 2020/6/29
N2 - To investigate whether hydrothermal liquefaction (HTL) could degrade perfluoroalkyl acids (PFAAs) accumulated in plant biomass, we first evaluated degradation of individual and mixed PFAAs in pure aqueous solutions. It was found that all five perfluorocarboxylic acids (PFCAs) were removed completely after 2 h at 300 °C. Three perfluorosulfonic acids (PFSAs) had removal efficiencies of less than 20%. With the amendment of KOH, however, the removal of PFSAs by HTL increased significantly to 85.9 ± 1.2%. HTL also removed PFAAs accumulated in common cattails (Typha latifolia). Regarding PFCAs, nearly 100% disappearance after HTL was observed. Specific to perfluorooctanesulfonic acid (PFOS), one of the PFSAs, the removal of this compound in roots was 98.4%. For shoots, it was 49.7%. These promising results point to the need for further investigation so that HTL can be optimized to handle biomass of plants used for phytoremediation of PFAS.
AB - To investigate whether hydrothermal liquefaction (HTL) could degrade perfluoroalkyl acids (PFAAs) accumulated in plant biomass, we first evaluated degradation of individual and mixed PFAAs in pure aqueous solutions. It was found that all five perfluorocarboxylic acids (PFCAs) were removed completely after 2 h at 300 °C. Three perfluorosulfonic acids (PFSAs) had removal efficiencies of less than 20%. With the amendment of KOH, however, the removal of PFSAs by HTL increased significantly to 85.9 ± 1.2%. HTL also removed PFAAs accumulated in common cattails (Typha latifolia). Regarding PFCAs, nearly 100% disappearance after HTL was observed. Specific to perfluorooctanesulfonic acid (PFOS), one of the PFSAs, the removal of this compound in roots was 98.4%. For shoots, it was 49.7%. These promising results point to the need for further investigation so that HTL can be optimized to handle biomass of plants used for phytoremediation of PFAS.
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U2 - 10.1021/acssuschemeng.0c03249
DO - 10.1021/acssuschemeng.0c03249
M3 - Article
AN - SCOPUS:85087629865
SN - 2168-0485
VL - 8
SP - 9257
EP - 9262
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
IS - 25
ER -
