Title: Wood preserving waste-contaminated soil: Treatment and toxicity response
Abstract: Soils contaminated with pentachlorophenol (PCP) and creosote were treated without bioaugmentation at field scale in tow 1-acre land treatment units (LTUs) at Libby, Montana. The concentration of indicator compounds of treatment performance, i.e., PCP, pyrene, total carcinogenic polycyclic aromatic hydrocarbons (TCPAHs) were monitored in the soil by taking both composited and discrete soil samples. A statistically significant decrease in PCP, pyrene, and TCPAH concentration occurred at field scale, and first-order degradation rate kinetics, from discrete and composited soil samples, satisfactorily represented the chemical loss for these compounds. Detoxification, as measured by the Microtox{trademark} assay, occurred in the soil; and toxicity reduction corresponded with PCP, pyrene, and TCPAH disappearance. No increase in toxicity in the lower treated soil layers (lifts) of the LTUs was observed with time, while the upper, more recently applied lifts were highly contaminated and toxic. This indicated that vertical migration of soluble contaminants had little effect on microbial activity in lower lifts of treated soil.
Publication Year: 1995
Publication Date: 1995-12-31
Language: en
Type: article
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Cited By Count: 3
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