Photocatalytic degradation of trinitrotoluene and other nitroaromatic compounds

Dillert, Ralf; Brandt, Matthias; Fornefett, Iris; Siebers, Ulrike; Bahnemann, Detlef W.

doi:10.1016/0045-6535(95)00105-h

Cited by 74 publications

(39 citation statements)

References 13 publications

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“…TNT has been listed as a priority pollutant, a Class C carcinogen, and has adverse effects on humans, plants, and animals (Rosenblatt et al 1991;Smith 1991;Won, DiSalvo, and Ng 1976;Palazzo and Leggett 1986;Simini et al 1995). TNT remediation methods, such as incineration, composting, bioremediation, and photolysis, have been used with mixed success (Bruns-Nagel et al 1998;Dillert et al 1995;Lang et al 1998;Haselhorst 1999;Hawari et al 2000). Existing technologies are hindered by problems such as high energy costs, costly equipment, extensive soil excavation, very slow degradation rates, or incomplete degradation of the explosive contaminants.…”

Section: Introductionmentioning

confidence: 99%

“…The rate of TNT transformation when exposed to ultraviolet light (Dillert et al 1995), to iron (II) (Brannon, Prince, and Hayes 1998), or to a combination of UV light, ozone, and electrohydraulic discharge (Lang et al 1998) is enhanced at alkaline pH. Dunnivant and Schwarzenbach (1992) reported that TNT degradation caused by natural organic matter (NOM) was increased by elevated pH.…”

Section: Introductionmentioning

confidence: 99%

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UV–VIS spectroscopy of 2,4,6-trinitrotoluene-hydroxide reaction

2002

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

UV–VIS spectroscopy of 2,4,6-trinitrotoluene-hydroxide reaction

2002

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“…First order kinetics of photocatalytic phenol oxidation has already been reported in the literature (see, e.g. [23][24][25] and refs cited therein), and also by the present author [16,17]. The previously reported rate constant for phenol photooxidation by TiO2 was 5.9x10 "s mol dm 3 s "I.…”

Section: Resultsmentioning

confidence: 52%

Photocatalytic water purification: Destruction of resorcinol by irradiated titania

Duczmal

Sobczyński

1999

React Kinet Catal Lett

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“…1 A variety of degradation and conversion products results from biological 2,3 and chemical metabolisation 4 of the original compounds, as well as from technical byproducts of the production of explosives. In many studies, the toxicological effects have been ascertained for explosives and their metabolites.…”

mentioning

confidence: 99%

Investigation of the ionisation and fragmentation behaviour of different nitroaromatic compounds occurring as polar metabolites of explosives using electrospray ionisation tandem mass spectrometry

Schmidt

Herzschuh

Matysik

et al. 2006

Rapid Comm Mass Spectrometry

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In order to develop a liquid chromatography/electrospray ionisation tandem mass spectrometry (LC/ESI-MS/MS) method for identification and quantification of polar metabolites of explosives using a triple quadrupole system, the mass spectrometric ionisation and fragmentation behaviour of different nitrophenols, nitro- and aminonitrobenzoic acids, nitrotoluenesulfonic acids, and aminonitrotoluenes was investigated. Due to their different molecular structures, the substances concerned showed a very different ionisation efficiency in the ESI process. Interestingly, 2,4-dinitrobenzoic acid yielded no mass signals in the Q1 scan suggesting a thermal decarboxylation in the ion source, whereas the corresponding 3,5-isomer showed a high ionisation yield. Using negative ionisation polarity, carboxylic, phenolic, and sulfonic acid groups were deprotonated resulting in molecular anions, which could be fragmented in a collision cell. A pronounced dependency of the produced fragment ion series on the kind and position of substituents at the nitrobenzene ring (ortho effects) was observed and exploited for the development of substance-specific detection methods in the multiple reaction monitoring mode. In case of benzoic and sulfonic acids, decarboxylation and desulfonation, respectively, were observed as the most frequent fragmentation reactions. Furthermore, besides loss of NO(2), NO fragmentation occurred and preceded a decarbonylation of the benzene ring. The expulsion of the open-shell molecules NO and NO(2) led to a variety of distonic radical anions.

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Photocatalytic degradation of trinitrotoluene and other nitroaromatic compounds

Cited by 74 publications

References 13 publications

UV–VIS spectroscopy of 2,4,6-trinitrotoluene-hydroxide reaction

UV–VIS spectroscopy of 2,4,6-trinitrotoluene-hydroxide reaction

Photocatalytic water purification: Destruction of resorcinol by irradiated titania

Investigation of the ionisation and fragmentation behaviour of different nitroaromatic compounds occurring as polar metabolites of explosives using electrospray ionisation tandem mass spectrometry

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