Journal
CHEMOSPHERE
Volume 134, Issue -, Pages 435-437Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2015.05.012
Keywords
Perfluorooctanesulfonic acid (PFOS); Perfluorooctanoic acid (PFOA); Biochar; Sludge
Categories
Funding
- Research Program for Agricultural Science & Technology Development, Rural Development Administration, Republic of Korea [PJ009301]
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Biochar has been recently considered as a candidate for soil amendment and soil remediation. Some pollutants have been screened in the biochar for safety purposes except for perfluorochemicals (PFCs). In this study, the contamination of biochars from plant residues and sewage sludge with perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) was examined. The total residual concentrations of PFOA and PFOS in the sludge biochar were 15.8-16.9 ng/g and these values did not decrease significantly after pyrolysis. On the other hand, these PFCs were not found in the biochar from plant sources. In conclusion, the use of the sludge biochar in the agricultural environment should be re-evaluated, since the concentrations of PFCs in the sewage sludge showed no significant decrease after thermal process. (C) 2015 Elsevier Ltd. All rights reserved.
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