Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/66543
Title: Effect of heavy metals on the bioremediation of petroleum hydrocarbons
Authors: Tan, H.-M.
Ting, Y.-P. 
Fang, C.
Issue Date: 1999
Source: Tan, H.-M.,Ting, Y.-P.,Fang, C. (1999). Effect of heavy metals on the bioremediation of petroleum hydrocarbons. Battelle Memorial Institute International In Situ and On-Site Bioreclamation Symposium Proceedings 5 : 3/-. ScholarBank@NUS Repository.
Abstract: Bioremediation of soil contaminated with petroleum hydrocarbons (dodecane, pristane and phenanthrene) and heavy metals (cadmium and lead) was studied. The effect of the heavy metals (alone or in combination) on the biodegradation of the petroleum hydrocarbons was also evaluated. Under abiotic conditions, reduction was greatest for dodecane, followed by phenanthrene and then pristane. Under biotic conditions, the greatest loss was observed in dodecane, followed by pristane and then phenanthrene. The presence of cadmium at 130 ppm did not significantly affect dodecane and pristane biodegradation. Higher concentrations of cadmium singly or in combination with lead at 800 and 1300 ppm resulted in lower biodegradation rates for dodecane and, to a lesser extent, pristane. Major phenanthrene degradation was not observed. Based on the results, cadmium had a more adverse effect on microbiota than lead, and therefore had a more crucial role in hydrocarbon remediation. However, the impact of heavy metals become less significant with higher recalcitrance of the hydrocarbon compound.
Source Title: Battelle Memorial Institute International In Situ and On-Site Bioreclamation Symposium Proceedings
URI: http://scholarbank.nus.edu.sg/handle/10635/66543
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