Sonochemical decomposition of perfluorooctane sulfonate and perfluorooctanoic acid.
Perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) are shown to be globally distributed, environmentally persistent, and bioaccumulative. Although the toxicities of these compounds were reported, the cleanup procedure from the environment is not developed because of their inertness. In this report the sonochemical degradations of PFOS and PFOA to the products through the fission of the perfluorocarbon chains were observed and the half-life times of the PFOS and PFOA degradations under an argon atmosphere determined to be 43 and 22 min, respectively. The shortening of perfluorocarbon chain of PFOS and PFOA leads to the lowering of the toxicity in view of the decrease of the persistence, and the technique would contribute to the remediation of the environmental pollution by these compounds.
Moriwaki
Hiroshi
H
Osaka City Institute of Public Health & Environmental Sciences, 8-34, Tojo-cho, Tennoji-ku, Osaka 543-0026, Japan. hiroshi.moriwaki@iphes.city.osaka.jp
Takagi
Youichi
Y
Tanaka
Masanobu
M
Tsuruho
Kenshiro
K
Okitsu
Kenji
K
Maeda
Yasuaki
Y
D017738:Alkanesulfonic Acids / Q000737:chemistry*; D002210:Caprylates / Q000737:chemistry*; D005466:Fluorocarbons / Q000737:chemistry*; D013010:Sonication; D018508:Water Purification / Q000379:methods
D017738:Alkanesulfonic Acids; D002210:Caprylates; D005466:Fluorocarbons; C023036:perfluorooctanoic acid; C076994:perfluorooctane sulfonic acid