Please use this identifier to cite or link to this item:
|Title:||Optimization of slow-release fertilizer dosage for bioremediation of oil-contaminated beach sediment in a tropical environment|
|Citation:||Xu, R., Obbard, J.P., Tay, E.T.C. (2003-10). Optimization of slow-release fertilizer dosage for bioremediation of oil-contaminated beach sediment in a tropical environment. World Journal of Microbiology and Biotechnology 19 (7) : 719-725. ScholarBank@NUS Repository. https://doi.org/10.1023/A:1025116421986|
|Abstract:||The optimization of fertilizer concentrations for stimulating bioremediation in contaminated marine substrates is desirable for minimizing both cost and environmental risks associated with eutrophication. In this study, the effect of various dosages of the slow-release fertilizer, Osmocote™, in stimulating an indigenous microbial biomass in oil-contaminated beach sediments was investigated. The Osmocote™ used comprises water-soluble N-P-K at concentrations of 18, 4.8, and 8.3% w/w respectively, and dosages tested were in the range of 0-4.0% dry weight equivalent of sediment. The beach sediments were taken from a tropical foreshore environment and spiked with an Arabian light crude oil (ALCO) to achieve a petroleum hydrocarbon content of 4.4% w/w. The experiment was conducted in open microcosms irrigated with seawater over a 42-day period. It was found that all Osmocote™-dosed sediments had a sustained nutrient release for at least 42 days. An addition of 0.8% Osmocote™ to the sediments was sufficient to maximize metabolic activity of the biomass, and the biodegradation of straight-chain alkanes (C10-C33). An Osmocote™ dosage of 1.5% resulted in optimal biodegradation of more recalcitrant branched-chain alkanes (i.e. pristane, and phytane).|
|Source Title:||World Journal of Microbiology and Biotechnology|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jan 17, 2019
WEB OF SCIENCETM
checked on Jan 9, 2019
checked on Nov 23, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.