Title :
Recovery of Fluoride Ions Using Electrodialysis From the Plasma-Treated Solution of Perfluoro Compounds
Author :
Takeuchi, Nozomi ; Saito, Yusuke ; Obo, Hayato ; Kosugi, Akihiro ; Yasuoka, Koichi
Author_Institution :
Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol., Tokyo, Japan
Abstract :
During the decomposition of perfluorooctane sulfonic acid (PFOS) by plasma, fluoride ions are generated in water. Since fluorine is an important resource for industry, the recovery of the fluoride ions from the plasma-treated PFOS solution was performed by an electrodialysis method. PFOS and the by-products in the solution caused fouling. Therefore, electrodialysis was conducted after the complete decomposition of PFOS by the plasma. As a result, 96% of the fluoride ions were successfully recovered from a 20-mL plasma-treated solution containing fluoride ions at a concentration of 30.4 mg/L.
Keywords :
dissociation; maintenance engineering; organic compounds; plasma applications; plasma chemistry; wastewater treatment; PFOS decomposition method; electrodialysis method; fluoride ions; fouling; perfluoro compounds; perfluorooctane sulfonic acid decomposition; plasma-treated PFOS solution; plasma-treated solution; Argon; Calcium; Carbon; Electrodes; Ions; Plasmas; Radiation effects; Electrodialysis; fluoride ion; perfluorooctane sulfonic acid (PFOS); plasma;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2012.2205712
