Protocol for determining bioavailability and biokinetics of organic pollutants in dispersed, compacted and intact soil systems to enhance in situ bioremediation |
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Authors: | H H Tabak R Govind |
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Institution: | (1) US Environmental Protection Agency, ORD, National Risk Management Research Laboratory, Cincinnati, OH 45268, USA, US;(2) Department of Chemical Engineering, University of Cincinnati, Cincinnati, OH 45221-0171, USA, US |
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Abstract: | The development of effective in situ and on-site bioremediation technologies can facilitate the cleanup of chemically-contaminated soil sites. Knowledge of biodegradation
kinetics and the bioavailability of organic pollutants can facilitate decisions on the efficacy of in situ and on-site bioremediation of contaminated soils and determine the attainable treatment end-points. Two kinds of compounds
have been studied: (1) phenol and alkyl phenols, which represent hydrophilic compounds, exhibiting high water solubility
and moderate to low soil partitioning; and (2) polycyclic aromatic hydrocarbons which are hydrophobic compounds with low
water solubility and exhibit significant partitioning in soil organic carbon. Representative data are given for phenol and
naphthalene. The results provide support for a systematic multi-level protocol using soil slurry, wafer and porous tube or
column reactors to determine the biokinetic parameters for toxic organic pollutants. Insights into bioremediation rates
of soil contaminants in compact soil systems can be attained using the protocol.
Received 04 December 1995/ Accepted in revised form 31 January 1997 |
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Keywords: | : biodegradation kinetics bioavailability slurry wafer tube and column bioreactors respirometry bioremediation soil |
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