Decomposition of Perfluorinated Compounds in Water by DC Plasma within Oxygen Bubbles

被引：56

作者：

Hayashi, Ryuichi ^{[1
]}

Obo, Hayato ^{[1
]}

Takeuchi, Nozomi ^{[1
]}

Yasuoka, Koichi ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Elect & Elect Engn, Meguro Ku, Tokyo 1528552, Japan

来源：

ELECTRICAL ENGINEERING IN JAPAN | 2015年 / 190卷 / 03期

关键词：

DC plasma within bubbles; PFOA; PFOS; PERFLUOROOCTANE SULFONATE; SURFACTANTS; PFOA; ACID;

D O I：

10.1002/eej.22499

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Complete decomposition of perfluorooctanoic acid (PFOA) at a concentration of 41.4 mg/L and perfluorooctane sulfonate (PFOS) at a concentration of 60 mg/L in water was successfully completed by DC plasma within oxygen bubbles. PFOA and PFOS were decomposed completely after 3-h operation and 8-h operation, respectively. The decomposition efficiency was evaluated by measuring the amounts of fluorine ions that were detached from PFOA and PFOS in the solution. As indicated by the measurement of LC/MS, the main byproducts generated during the plasma treatment turned out to be perfluorocarboxylic acids. For practical application, 2-parallel operation of DC plasma was also demonstrated as a basic technology for a large capacity reactor. The decomposition efficiency of 2-parallel operation was at the same level as that of single operation.

引用

页码：9 / 16

页数：8

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