Abstract
In the present study conducted soil remediation experiments were conducted for PFAS using liquid activated charcoals. Three types of liquid activated charcoal were injected into lysimeter and then contaminated river water was applied to the soil. Leached water after adsorption by activated charcoal in soil was analyzed using ISO 21675 and revealed several findings. 1) Most PFAS can be stabilized in soil (Andosol) after liquid activated charcoal injection. 2) PFSA seems to be more stabilized than PFCA because of less water solubility. 3) To the best of our knowledge, this is the first report to evaluate rice husk-based activated charcoal (TriporousTM) for adsorption of PFAS in comparison to coal-based and coconut shell-based activated charcoal, which revealed that both dispersion potency of liquid activated charcoal in soil and affinity to PFAS must have been considered to enable effective remediation. 4) Andosol with higher percentage of organic carbon represented longer residence time of PFAS in soil compared to cray soil which was previously reported. 5) Measurement of fourteen quantified PFAS in leached water using ISO 21675 enabled accurate understanding for kinetics of individual PFAS during soil remediation processes.
