The influence of creosote compounds on the aerobic degradation of toluene |
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Authors: | Søren Dyreborg Erik Arvin and Kim Broholm |
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Institution: | (1) Institute of Environmental Science and Engineering, Technical University of Denmark, Building 115, DK-2800 Lyngby, Denmark |
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Abstract: | The inhibiting effect of 14 typical creosote compounds on the aerobic degradation of toluene was studied in batch experiments. Four NSO-compounds (pyrrole, 1-methylpyrrole, thiophene, and benzofuran) strongly inhibited the degradation of toluene. When the NSO-compounds were present together with toluene, little or no degradation of toluene was observed during 16 days of incubation, compared with a total removal of toluene within 4 days when the four compounds were absent. Indole (an N-compound) and three phenolic compounds (phenol, o-cresol, and 2,4-dimethylphenol) also inhibited the degradation of toluene, though the effect was much weaker that of the four NSO-compounds. O-xylene, p-xylene, naphthalene and 1-methylnaphthalene seemed to stimulate the degradation even though the influence was very weak. No effects of benzothiophene (an S-compound) and quinoline (an N-compound) were observed. Benzofuran (an O-compound) was identified as the compound that most inhibited the degradation of toluene. An effect could be detected even at low concentrations (40 g/l).Abbreviations bf
benzofuran
- bt
benzothiophene
- dmp
2,4-dimethylphenol
- GC
gas chromatograph
- ind
indole
- mnap
1-methylnaphthalene
- MAH
monoaromatic hydrocarbons
- mpyr
1-methylpyrrole
- nap
naphthalene
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o-cre
o-cresol
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o-xyl
o-xylene
- phe
phenol
- pyr
pyrrole
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p-xyl
p-xylene
- tol
toluene
- thi
thiophene
- qui
quinoline |
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Keywords: | Aerobic degradation creosote compounds factorial design inhibition interactions toluene |
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