Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
6315771
Reference Type
Journal Article
Title
Biochar sorption of PFOS, PFOA, PFHxS and PFHxA in two soils with contrasting texture
Author(s)
Askeland, M; Clarke, BO; Cheema, SA; Mendez, A; Gasco, G; Paz-Ferreiro, J
Year
2020
Is Peer Reviewed?
Yes
Journal
Chemosphere
ISSN:
0045-6535
EISSN:
1879-1298
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Location
OXFORD
Volume
249
Page Numbers
126072
Language
English
PMID
32045751
DOI
10.1016/j.chemosphere.2020.126072
Web of Science Id
WOS:000527935600011
URL
http://www.sciencedirect.com/science/article/pii/S0045653520302654
Exit
Abstract
The ability to immobilise PFAS in soil may be an essential interim tool while technologies are developed for effective long-term treatment of PFAS contaminated soils. Serial sorption experiments were undertaken using a pine derived biochar produced at 750 °C (P750). All experiments were carried out either in individual mode (solution with one PFAS at 5 μg/L) or mix mode (solution with 5 μg/L of each: PFOS, PFOA, PFHxS and PFHxA), and carried out in 2:1 water to soil solutions. Soils had biochar added in the range 0-5% w/w. Kinetic data were fitted to the pseudo-second order model for both amended soils, with equilibrium times ranging 0.5-96 h for all congeners. PFOS sorption was 11.1 ± 4.5% in the loamy sand compared to 69.8 ± 4.9% in the sandy clay loam. While total sorption was higher in the unamended loamy sand than sandy clay loam for PFHxA, PFOA and PFOS, the effect of biochar amendment for each compound was found to be significantly higher in amended sandy clay loam than in amended loamy sand. Application of biochar reduced the desorbed PFAS fraction of all soils. Soil type and experimental mode played a significant role in influencing desorption. Overall, the relationship between sorbent and congener was demonstrated to be highly impacted by soil type, however the unique physiochemical properties of each PFAS congener greatly influenced its unique equilibrium, sorption and desorption behaviour for each amended soil and mode tested.
Keywords
Biochar; Soil remediation
Tags
PFAS
•
Additional PFAS (formerly XAgency)
•
Expanded PFAS SEM (formerly PFAS 430)
Litsearch Update: November 2021
PubMed
Web of Science
Perfluorooctane
Potassium perfluorooctanoate
•
PFAS 150
Literature Search Update December 2021
PubMed
WOS
Missing 2021 searches
Literature Search Update December 2020
PubMed
WOS
Literature Search August 2019
PubMed
Web of Science
Not prioritized for screening
Perfluorinated compounds
Perfluorohexanesulfonic acid
Perfluorooctane
•
PFHxA
LitSearch Update: May 2019 - May 2020
PubMed
Scopus: April 2021
HAWC
•
PFHxS
Database searches
Pubmed
WOS
Scopus
Supplemental
TiAb
Manufacture, engineering, use, treatment, remediation, or laboratory methods
•
PFOA (335-67-1) and PFOS (1763-23-1)
LitSearch: Feb 2019 - May 2020
PubMed
WoS
Literature Search Update (Apr 2019 - Sep 2020)
PubMed
WOS
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity