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  • 1
    Digitale Medien
    Digitale Medien
    Bioremediation of 2,4,6-trinitrotoluene-contaminated soils by two different aerated compost systems (1996)
    Springer
    Applied microbiology and biotechnology 44 (1996), S. 795-800 
    Details
    ISSN: 1432-0614
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Abstract  Two composting systems were compared on a laboratory scale as a bioremediation technology for degradation or immobilization of 2,4,6-trinitrotoluene (TNT) in contaminated soils. The first compost was aerated from the beginning whereas the second compost was only aerated after an anaerobic prephase of 65 days. In the first compost system the TNT concentration declined rapidly by 92% but, at the end, TNT could be partially recovered. During the anaerobic prephase of the second compost system, TNT was almost completely converted to aminodinitrotoluenes, which during the subsequent aeration almost entirely disappeared. In addition, the second compost generated less toxic material than the first one as confirmed by inhibition of bioluminescence of Vibrio fischeri. These data show that microbiological TNT-degradation systems can be successfully designed which are prerequisite for an efficient bioremediation of contaminated soils.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00178621
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Analysis of aminobenzoic acids in waste water from a former ammunition plant with HPLC and combined diode array and fluorescence detection (1997)
    Springer
    Fresenius' journal of analytical chemistry 357 (1997), S. 121-126 
    Details
    ISSN: 1432-1130
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract  Aminobenzoic acids are of major interest in clinical analysis, but their determination in environmental samples has been rarely done. Therefore a method for the determination of 10 aminobenzoic acids in water has been developed, using high-performance liquid chromatography with combined diode array and fluorescence detection. A separation of the analytes has been achieved with a buffer pH 3/methanol gradient. The general elution order has been m-substituted〈p-subst.〈o-subst. aminobenzoic acids. UV and fluorescence data are presented. In a highly polluted water sample of the former ammunition plant Stadtallendorf/Hessen, 4-aminobenzoic acid, 2-amino- benzoic acid and 2-amino-4-nitrobenzoic acid have been detected. After passing a charcoal filter, only the concentration of 4-aminobenzoic acid in a sample from the same site has been above the detection limit. Besides the ten analytes investigated, several unknown compounds have been present in the samples.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002160050124
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  • 3
    Digitale Medien
    Digitale Medien
    Solid-phase extraction of aminobenzoic acids and aminotoluenesulfonic acids with graphitized carbon black (1998)
    Springer
    Fresenius' journal of analytical chemistry 360 (1998), S. 805-807 
    Details
    ISSN: 1432-1130
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract The extraction of amphoteric aromatic amines from water samples is difficult because of their high polarity. For the enrichment of aminobenzoic acids and aminotoluenesulfonic acids with solid-phase extraction, graphitized carbon black (GCB) was investigated. With few exceptions, the 12 analytes studied were extracted with recoveries 〉 60% at neutral or basic pH, whereas at pH 3 low recoveries were obtained. Addition of salt caused a decrease of about 50% in recoveries, addition of standard humic acid a decrease of about 20%. The capacity of GCB cartridges was determined with the breakthrough volume for 4-aminobenzoic acid at different concentrations to be 0.5–1% (w/w).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002160050813
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  • 4
    Digitale Medien
    Digitale Medien
    Derivatization of aromatic amines for analysis in ammunition wastewater I. Derivatization via bromination of the aromatic ring (1997)
    Springer
    Fresenius' journal of analytical chemistry 357 (1997), S. 909-914 
    Details
    ISSN: 1432-1130
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract  A new derivatization method for aromatic amines is presented based on the bromination of the aromatic ring system in an acetic acid medium to yield bromo derivatives. The derivatization method is very simple to perform and overcomes several problems common in the analysis of polar aromatic amines. The derivatives are easy to extract with pentane and can be separated with gas chromatography. Due to the introduction of the electron withdrawing bromo substituents sensitive detection using an electron capture detector is possible. The method was used to investigate the contents of amino- and aminonitrotoluenes in water samples from the site of a former ammunition plant.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002160050273
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  • 5
    Digitale Medien
    Digitale Medien
    Derivatization of aromatic amines for analysis in ammunition wastewater II: Derivatization of methyl anilines by iodination with a Sandmeyer-like reaction (1997)
    Springer
    Fresenius' journal of analytical chemistry 359 (1997), S. 497-501 
    Details
    ISSN: 1432-1130
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract An analytical method for the determination of aromatic amines in water is introduced that uses iodination with a Sandmeyer-like reaction to replace the amino group by iodine in aqueous solution. The non-polar derivatives are extracted with pentane or toluene, separated with gas chromatography and sensitively detected with an ECD. Thirteen major metabolites of nitroaromatic explosives were investigated. The method was used to analyze these metabolites in water samples from the site of a former ammunition plant. The results are compared with the derivatization of aromatic amines via bromination of the aromatic ring.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002160050620
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