Biodegradation of 2-chlorophenol in forest soil: effect of inoculation with aerobic sewage sludge
LALLAI, ANTONIO;
2004-01-01
Abstract
Decontamination of 2-monochlorophenol–containing forest soil was studied in laboratory experiments. We found that in sterile soil, sorption of chlorophenol can occur. Chlorophenol disappearance of approximately 55% was observed in native soil; both soil sorption and degradation by indigenous soil populations caused this disappearance. In native soil, however, the rate of chlorophenol disappearance was enhanced up to slightly more than 90% by inoculation with a sludge taken from the aeration tank of a municipal wastewater treatment plant. In this sludge, the presence of Alcaligenes and Pseudomonas spp. was observed. In other experiments, addition to the soil of a laboratory culture preacclimated to 2-monochlorophenol did not lead to a greater increase in chlorophenol disappearance. In contrast to native soil, inoculation of sterile soil had no effect on disappearance of the chlorophenol. A possible explanation for the lack of cometabolic degradation is that autoclaving of the soil destroys the organic substances within it.Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.