Catalytic ozonation of PCE by clay from tidal flat sediments

被引：11

作者：

Chung, HH ^{[1
]}

Jung, JH ^{[1
]}

Yoon, JH ^{[1
]}

Lee, MJ ^{[1
]}

机构：

[1] Korea Atom Energy Res Inst, Radioisotope & Radiat Applicat Team, Taejon 305353, South Korea

来源：

CATALYSIS LETTERS | 2002年 / 78卷 / 1-4期

关键词：

catalyst; clay; EPR; ozonation; PCE;

D O I：

10.1023/A:1014933620087

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Clay from tidal flat sediments showed an efficient catalytic activity in the decomposition of PCE by ozonation where the thermal treatment of clay enhanced the catalytic activity. No changes in XRD patterns of clays by the thermal treatment were observed, while EPR spectra were significantly changed. The intensity of the EPR signal that arises from natural radiation defect was decreased with increasing thermal treatment temperature, which enhanced the PCE removal efficiency. Contrary to ozonation along, superoxide radicals were detected from ozonation in the presence of clay. This suggests that the superoxide radicals further increase PCE decomposition.

引用

页码：77 / 79

页数：3

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