naa a22 4500 510750370 CHVBK 20180411083102.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s11270-013-1714-y doi (NATIONALLICENCE)springer-10.1007/s11270-013-1714-y Remediation of Perfluorooctane Sulfonate in Contaminated Soils by Modified Clay Adsorbent—a Risk-Based Approach [Elektronische Daten] [Piw Das, Victor Arias E., Venkata Kambala, Megharaj Mallavarapu, Ravi Naidu] Perfluorooctane sulfonate (PFOS), which has numerous uses besides being an ingredient in the formulation of aqueous film-forming foams, is considered as an emerging pollutant of increasing public health and environmental concern due to recent reports of its worldwide distribution, environmental persistence and bioaccumulation potential. In an attempt to recommend a ‘risk-based' remediation strategy, this study investigates the removal of PFOS from impacted waters and fixation of PFOS in impacted soils using a novel modified clay adsorbent (MatCARE™, patent number 2009905953). Batch adsorption tests demonstrated a much faster adsorption kinetics (only 60min to reach equilibrium) and remarkably higher PFOS adsorption capacity (0.09mmolg−1) of the MatCARE™ compared to a commercial activated carbon (0.07mmolg−1). Treatability studies, performed by treating the PFOS-contaminated soils with the MatCARE™ (10% w/w) and then incubating at 25 and 37°C temperatures maintaining 60% of the maximum water holding capacity of the soils for a period of a year, demonstrated a negligible release (water extractable) of the contaminant (only 0.5 to 0.6%). The fixation of PFOS in soils by the new adsorbent was exothermic in nature. Soils with higher clay and organic matter content, but lower pH values, retained PFOS to a much greater extent. A cost analyses confirmed that the MatCARETM could be an economically viable option for the ‘risk-based' remediation of PFOS in contaminated waters and soils. Springer Science+Business Media Dordrecht, 2013 Perfluorooctane sulfonate (PFOS) nationallicence MatCARE™ nationallicence Adsorption nationallicence PFOS-contaminated soil nationallicence Remediation nationallicence Das Piw CERAR—Centre for Environmental Risk Assessment and Remediation, Building X, University of South Australia, 5095, Mawson Lakes, SA, Australia aut Arias E. Victor CERAR—Centre for Environmental Risk Assessment and Remediation, Building X, University of South Australia, 5095, Mawson Lakes, SA, Australia aut Kambala Venkata CERAR—Centre for Environmental Risk Assessment and Remediation, Building X, University of South Australia, 5095, Mawson Lakes, SA, Australia aut Mallavarapu Megharaj CERAR—Centre for Environmental Risk Assessment and Remediation, Building X, University of South Australia, 5095, Mawson Lakes, SA, Australia aut Naidu Ravi CERAR—Centre for Environmental Risk Assessment and Remediation, Building X, University of South Australia, 5095, Mawson Lakes, SA, Australia aut Water, Air, & Soil Pollution Springer Netherlands 224/12(2013-12-01), 1-14 0049-6979 224:12<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1714-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1714-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Das Piw CERAR—Centre for Environmental Risk Assessment and Remediation, Building X, University of South Australia, 5095, Mawson Lakes, SA, Australia aut NATIONALLICENCE 700 1- Arias E Victor CERAR—Centre for Environmental Risk Assessment and Remediation, Building X, University of South Australia, 5095, Mawson Lakes, SA, Australia aut NATIONALLICENCE 700 1- Kambala Venkata CERAR—Centre for Environmental Risk Assessment and Remediation, Building X, University of South Australia, 5095, Mawson Lakes, SA, Australia aut NATIONALLICENCE 700 1- Mallavarapu Megharaj CERAR—Centre for Environmental Risk Assessment and Remediation, Building X, University of South Australia, 5095, Mawson Lakes, SA, Australia aut NATIONALLICENCE 700 1- Naidu Ravi CERAR—Centre for Environmental Risk Assessment and Remediation, Building X, University of South Australia, 5095, Mawson Lakes, SA, Australia aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/12(2013-12-01), 1-14 0049-6979 224:12<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer