BIODEGRADATION OF
14 CN-ACETYL-D-GLUCOSAMINE
IN THE PRESENCE OF CHLORINATED COMPOUNDS
SEDIMENT: WATER PHASE
Figure 3 : Biodegradation of
14 C-N-acetyl D-glucosamine in the presence of chlorinated compounds.
This phenomena was subsequently confirmed by scanning electron microscopy in microcosm tests with chitin suspended above the water/ sediment interface. Figures 4 and 5
depict chitin colonization at 4h and 12 h following 1,2 DCE toxicant addition. A more
homogeneous epiphytic population can be seen at 12 h. This ecological transition toward
a more specific, dominant microbiota was demonstrated in SEM studies with other
toxicant classes.
DISCUSSION
Toxicant-mediated activities can be described and partially modeled in bench-scale
laboratory microcosm units. Toxicant residence time and half-lifes are affected by the
relative heterotrophic activity and available naturally-occurring substrate concentration
(biotic factors), as well as by sportive phenomena under diverse salinity and pH states
(abiotic factors). Flow rate is an additional physical factor to be considered.
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14 CN-ACETYL-D-GLUCOSAMINE
IN THE PRESENCE OF CHLORINATED COMPOUNDS
SEDIMENT: WATER PHASE
Figure 3 : Biodegradation of
14 C-N-acetyl D-glucosamine in the presence of chlorinated compounds.
This phenomena was subsequently confirmed by scanning electron microscopy in microcosm tests with chitin suspended above the water/ sediment interface. Figures 4 and 5
depict chitin colonization at 4h and 12 h following 1,2 DCE toxicant addition. A more
homogeneous epiphytic population can be seen at 12 h. This ecological transition toward
a more specific, dominant microbiota was demonstrated in SEM studies with other
toxicant classes.
DISCUSSION
Toxicant-mediated activities can be described and partially modeled in bench-scale
laboratory microcosm units. Toxicant residence time and half-lifes are affected by the
relative heterotrophic activity and available naturally-occurring substrate concentration
(biotic factors), as well as by sportive phenomena under diverse salinity and pH states
(abiotic factors). Flow rate is an additional physical factor to be considered.
584