Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/74493
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dc.titleBiodegradation of polycyclic aromatic hydrocarbons in oil-contaminated beach sediments treated with nutrient amendments
dc.contributor.authorXu, R.
dc.contributor.authorObbard, J.P.
dc.date.accessioned2014-06-19T06:13:04Z
dc.date.available2014-06-19T06:13:04Z
dc.date.issued2004-05
dc.identifier.citationXu, R.,Obbard, J.P. (2004-05). Biodegradation of polycyclic aromatic hydrocarbons in oil-contaminated beach sediments treated with nutrient amendments. Journal of Environmental Quality 33 (3) : 861-867. ScholarBank@NUS Repository.
dc.identifier.issn00472425
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/74493
dc.description.abstractMicrobial biodegradation of polycyclic aromatic hydrocarbons (PAHs) during the process of bioremediation can be constrained by lack of nutrients, low bioavailability of the contaminants, or scarcity of PAH-biodegrading microorganisms. This study focused on addressing the limitation of nutrient availability for PAH biodegradation in oil-contaminated beach sediments. In our previous study, three nutrient sources including inorganic soluble nutrients, the slow-release fertilizer Osmocote (Os; Scotts, Marysville, OH) and Inipol EAP-22 (Ip; ATOFINA Chemicals, Philadelphia, PA), as well as their combinations, were applied to beach sediments contaminated with an Arabian light crude oil. Osmocote was the most effective nutrient source for aliphatic biodegradation. This study presents data on PAH biodegradation in the oil-spiked beach sediments amended with the three nutrients. Biodegradation of total target PAHs (two- to six-ring) in all treatments followed a first-order biodegradation model. The biodegradation rates of total target PAHs in the sediments treated with Os were significantly higher than those without. On Day 45, approximately 9.3% of total target PAHs remained in the sediments amended with Os alone, significantly lower than the 54.2 to 58.0% remaining in sediment treatments without Os. Amendment with Inipol or soluble nutrients alone, or in combination, did not stimulate biodegradation rates of PAHs with a ring number higher than 2. The slow-release fertilizer (Os) is therefore recommended as an effective nutrient amendment for intrinsic biodegradation of PAHs in oil-contaminated beach sediments.
dc.sourceScopus
dc.typeConference Paper
dc.contributor.departmentCHEMICAL & BIOMOLECULAR ENGINEERING
dc.description.sourcetitleJournal of Environmental Quality
dc.description.volume33
dc.description.issue3
dc.description.page861-867
dc.description.codenJEVQA
dc.identifier.isiutNOT_IN_WOS
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