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Stabilization and solidification remediation of soil contaminated with poly- and perfluoroalkyl substances (PFASs).
| Content Provider | Semantic Scholar |
|---|---|
| Author | Sörengård, Mattias Kleja, Dan Berggren Ahrens, Lutz |
| Copyright Year | 2019 |
| Abstract | Remediation methods for soils contaminated with poly- and perfluoroalkyl substances (PFASs) are urgently needed to protect the surrounding environment and drinking water source areas from pollution. In this study, the stabilization and solidification (S/S) technique was tested on aged PFAS-contaminated soil that were artificially spiked with 14 PFAS. To further reduce leaching of PFASs in S/S-treated soil, seven different additives were tested at 2% concentration: powdered activated carbon (PAC), Rembind®, pulverized zeolite, chitosan, hydrotalcite, bentonite, and calcium chloride. Standardized leaching tests on S/S-treated soil revealed that leaching of 13 out of 14 target PFASs (excluding perfluorobutane sulfonate (PFBA)) was reduced by, on average, 70% and 94% by adding PAC and Rembind®. Longer-chained PFASs such as perfluorooctane sulfonate (PFOS), which is considered persistent, bioaccumulative and toxic, were stabilized by 99.9% in all S/S treatments when PAC or Rembind® was used as an additive. The S/S stabilization efficiency depended on PFAS perfluorocarbon chain length and functional group, e.g., it increased on average by 11-15 % per CF3-moeity and was on average 49% higher for the perfluorosulfonates (PFSAs) than the perfluorocarboxylates (PFCAs). Overall, the S/S treatment with active carbon-based additives showed excellent performance in reducing leaching of PFASs, without marked loss of physical matrix stability. |
| Starting Page | 639 |
| Ending Page | 646 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.jhazmat.2019.01.005 |
| PubMed reference number | 30654281 |
| Journal | Medline |
| Volume Number | 367 |
| Alternate Webpage(s) | https://ziltek.com/wp-content/uploads/2019/03/RemBind-Paper-Journal-of-Hazardous-Materials-PFAS-Sweden.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.jhazmat.2019.01.005 |
| Journal | Journal of hazardous materials |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
