Radicals in the mechanochemical dechlorination of hazardous organochlorine compounds using CaO nanoparticles

Tadaaki Ikoma, Qiwu Zhang, Fumio Saito, Kimio Akiyama, Shozo Tero-Kubota, Tatsuhisa Kato

研究成果: Article査読

54 被引用数 (Scopus)

抄録

For the first time, we detected paramagnetic products generated during the grinding of 3-chlorobiphenyl (BP-Cl) with calcium oxide (CaO) nanoparticles by a ball mill method, which is one of the promising ways to detoxify hazardous chlorinated organic compounds. Those products were assigned to oxygen-centered aromatic radicals coming from BP-Cl and trapped electrons in oxygen vacancies on the surfaces of the CaO reactants using high-frequency and pulsed electron paramagnetic resonance spectroscopies. The observed good correlation between the dechlorination efficiency and the radical yield suggests that a radical mechanism plays an important role in the destruction of organochlorine compounds. The mechanochemical dechlorination could be interpreted by the following mechanism. First of all, the mechanical stressing induces the electron transfer from O 2- sites on the surface of the CaO particle to the organic compounds. The produced organic anion radicals then undergo the effective self-dissociation of a chlorine-carbon bond.

本文言語English
ページ(範囲)2303-2309
ページ数7
ジャーナルBulletin of the Chemical Society of Japan
74
12
DOI
出版ステータスPublished - 2001 12

ASJC Scopus subject areas

  • Chemistry(all)

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