Ultrasonication of aqueous and micellar suspensions of anthracene fixed on silica

被引：8

作者：

David, B ^{[1
]}

Riguier, D ^{[1
]}

机构：

[1] Univ Savoie, ESIGEC, Lab Chim Mol & Environm, F-73376 Le Bourget Du Lac, France

来源：

ULTRASONICS SONOCHEMISTRY | 2002年 / 9卷 / 01期

关键词：

anthracene; polycyclic aromatic hydrocarbon; ultrasound; frequency effect; silica; surfactant; degradation rate;

D O I：

10.1016/S1350-4177(01)00072-4

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Degradation under ultrasound irradiation of silica supported anthracene (Ant) in aqueous suspension is studied. The initial degradation rate of Ant on silica is 28- and 6-fold lower than the degradation rate in water alone, at 506 and 20 kHz, respectively. Analysis of emission and excitation spectra demonstrates the presence of two kinds of adsorbed Ant species: a molecular form and crystals. The former species is assumed to be initially degraded at 506 kHz, while the latter species is more difficult to decompose. Specific irradiation of micro-crystals of Ant in aqueous/methanolic solution leads to the formation of CO and CO2. A pyrolytic mechanism is expected to occur on the surface of silica and the kinetic rates would depend on the chemical nature of Ant at the surface. Added surfactants decrease dramatically the degradation rates on silica, but solubilizes Ant in larger amounts than in pure water. Surfactants are pyrolysed in water with and without silica and act more as degradation inhibitors than as Ant extracting agents. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：45 / 52

页数：8

共 37 条

[21] An investigation into the ultrasonic treatment of polluted solids [J].

Newman, AP ;

Lorimer, JP ;

Mason, TJ ;

Hutt, KR .

ULTRASONICS SONOCHEMISTRY, 1997, 4 (02) :153-156

[22] SONOCHEMICAL DEGRADATION OF PHENOL IN DILUTE AQUEOUS-SOLUTIONS - COMPARISON OF THE REACTION-RATES AT 20-KHZ AND 487-KHZ [J].

PETRIER, C ;

LAMY, MF ;

FRANCONY, A ;

BENAHCENE, A ;

DAVID, B ;

RENAUDIN, V ;

GONDREXON, N .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (41) :10514-10520

[23] Ultrasound and environment: Sonochemical destruction of chloroaromatic derivatives [J].

Petrier, C ;

Jiang, Y ;

Lamy, MF .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1998, 32 (09) :1316-1318

[24] UNEXPECTED FREQUENCY-EFFECTS ON THE RATE OF OXIDATIVE PROCESSES INDUCED BY ULTRASOUND [J].

PETRIER, C ;

JEUNET, A ;

LUCHE, JL ;

REVERDY, G .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (08) :3148-3150

[25] Influence of submicron particles on hydrophobic organic contaminants in precipitation .2. Scavenging of polycyclic aromatic hydrocarbons by rain [J].

Poster, DL ;

Baker, JE .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1996, 30 (01) :349-354

[26]

Ragaini V, 1998, SYNTHETIC ORGANIC SONOCHEMISTRY, P235

[27] Desorption by ultrasound: Phenol on activated carbon and polymeric resin [J].

Rege, SU ;

Yang, RT ;

Cain, CA .

AICHE JOURNAL, 1998, 44 (07) :1519-1528

[28]

SERPONE N, 1994, J PHYS CHEM-US, V98, P2834

[29]

Sparks D L., 1995, ENV SOIL CHEM, P23

[30] THE SITE OF SONOCHEMICAL REACTIONS [J].

SUSLICK, KS ;

HAMMERTON, DA .

IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, 1986, 33 (02) :143-147

← 1 2 3 4 →