PMID: 18710096Aug 20, 2008Paper

Petroleum-degrading microbial numbers in rhizosphere and non-rhizosphere crude oil-contaminated soil

International Journal of Phytoremediation
W D KirkpatrickC M Reynolds

Abstract

Phytoremediation can be a cost-effective and environmentally acceptable method to clean up crude oil-contaminated soils in situ. Our research objective was to determine the effects of nitrogen (N) additions and plant growth on the number of total hydrocarbon (TH)-, alkane-, and polycyclic aromatic hydrocarbon (PAH)-degrading microorganisms in weathered crude oil-contaminated soil. A warm-season grass, sudangrass (Sorghum sudanense (Piper) Stapf), was grown for 7 wk in soil with a total petroleum hydrocarbon (TPH) level of 16.6 g TPH/kg soil. Nitrogen was added based upon TPH-C:added total N (TPH-C:TN) ratios ranging from 44:1 to 11:1. Unvegetated and unamended controls were also evaluated. The TH-, alkane-, and PAH-degrading microbial numbers per gram of dry soil were enumerated from rhizosphere and non-rhizosphere soil for vegetated pots and non-rhizosphere soil populations were enumerated from non-vegetated pots. Total petroleum-degrading microbial numbers were also calculated for each pot. The TH-, alkane-, and PAH-degrading microbial numbers per gram of dry soil in the sudangrass rhizosphere were 3.4, 2.6, and 4.8 times larger, respectively, than those in non-rhizosphere soil across all N rates. The presence of sudangrass r...Continue Reading

References

Sep 30, 1992·Annals of the New York Academy of Sciences·J S VobeckyL Marquis
Apr 5, 2001·Journal of Environmental Quality·S L HutchinsonA P Schwab
Apr 25, 2003·International Journal of Phytoremediation·G J ThomaD C Wolf
Aug 22, 2003·International Journal of Phytoremediation·G J ThomaD C Wolf
Jan 31, 2004·International Journal of Phytoremediation·P M WhiteC M Reynolds
Nov 24, 2004·International Journal of Phytoremediation·Yen-Chih Chen, M Katherine Banks
Feb 20, 2007·International Journal of Phytoremediation·W D KirkpatrickC M Reynolds

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Citations

May 21, 2021·Environmental Geochemistry and Health·L G BakinaV A Vertebny
Dec 20, 2011·Environmental Science & Technology·Gregory H LefevreRaymond M Hozalski

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