Permanganate oxidation of sorbed polycyclic aromatic hydrocarbons

被引:92
作者
Brown, GS
Barton, LL
Thomson, BM
机构
[1] Sandia Natl Labs, Albuquerque, NM 87185 USA
[2] Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA
[3] Univ New Mexico, Dept Civil Engn, Albuquerque, NM 87131 USA
关键词
D O I
10.1016/S0956-053X(02)00119-8
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The polycyclic. aromatic hydrocarbons (PAH) that contaminate soils at many industrial and government sites are resistant to natural biotic and abiotic degradation processes. The recalcitrant nature of these compounds may require aggressive chemical treatment to effectively remediate these sites. This study was conducted to assess the viability of permanganate oxidative treatment as a method to reduce PAH concentration in contaminated soils. Study results demonstrated a reduction in soil sorbed concentration for a mixture of six PAHs that included anthracene, benzo(a)pyrene, chrysene, fluoranthene, phenanthrene, and pyrene by potassium permanganate (KMnO4) oxidative treatment. The greatest reduction in soil concentration was observed for benzo(a)pyrene, pyrene, phenanthrene, and anthracene at 72.1, 64.2, 56.2, and 53.8%, respectively, in 30 min at a KMnO4 concentration of 160 mM. Minimal reductions in fluoranthene and chrysene concentration were observed at 13.4 and 7.8%, respectively, under the same conditions. A relative chemical reactivity order of benzo(a)pyrene > pyrene > phenanthrene > anthracene > fluoranthene > chrysene towards permanganate ion was observed. Aromatic sextet theory was applied to the degradation results to explain the highly variable and compound-specific chemical reactivity order. (C) 2002 Elsevier Ltd. All rights reserved.
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页码:737 / 740
页数:4
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