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Title: Biodegradation of pyrene in Marine Beach sediments
Authors: Li, H.
Xu, R.
Obbard, J.P. 
Keywords: Biodegradation
Petroleum hydrocarbons
Slow-release fertilizer
Issue Date: 2006
Citation: Li, H.,Xu, R.,Obbard, J.P. (2006). Biodegradation of pyrene in Marine Beach sediments. Bioremediation Journal 10 (4) : 169-177. ScholarBank@NUS Repository.
Abstract: The potential of chitosan (0.1% dry weight equivalent) as a bioremediation additive for removal of the recalcitrant polycyclic aromatic hydrocarbon (PAH) pyrene in marine beach sediments was investigated using an open irrigation system over a 63-day period. Osmocote, a slow release fertilizer, was used as the key nutrient supplement at a concentration of 1% in sediment (dry weight equivalent). Osmocote significantly ( p < .05) enhanced nutrient levels, and the metabolic activity of the indigenous microbial biomass. Both additives were comparable in stimulating pyrene biodegradation rates; with chitosan (0.062 day -1) being slightly more effective as an amendment than Osmocote (0.051 day -1). Loss of pyrene in a control sediment (i.e., pyrene, without additives) was 66.6% over a 63-day period. The concurrent application of additives yielded the greatest biodegradation rates (0.072day -1), resulting in a 98.2% loss of pyrene over 63 days. The treatment of oil contaminated beach sediments with both osmocote (1%) and chitosan (0.1%) is therefore recommended as an effective treatment for the intrinsic biodegradation of recalcitrant PAHs in oil-contaminated beach sediments. © 2006 Taylor and Francis Group, LLC.
Source Title: Bioremediation Journal
ISSN: 10889868
DOI: 10.1080/10889860601021407
Appears in Collections:Staff Publications

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