Journal
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Volume 108, Issue 5, Pages 956-962Publisher
SPRINGER
DOI: 10.1007/s00128-022-03475-w
Keywords
Agroecology; Biodegradation; Biostimulation; Bioaugmentation; Bioventilation; Organic contaminants; Petroleum; Soil biota
Categories
Funding
- PRODEP-SEP [CA-UVER-173, CA-UVER-332]
- Mexican CONACYT [CB-2007-01/83600]
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This study found that the tropical endogeic earthworm Pontoscolex corethrurus and oil palm bagasse can synergistically remove petroleum hydrocarbons from crude oil-contaminated soil effectively.
The tropical endogeic earthworm Pontoscolex corethrurus, a non-standard species used in ecotoxicity, has been found in crude oil-contaminated habitats. We estimated the removal of total hydrocarbons from heavy crude Maya oil on an artificially contaminated soil with a median lethal concentration of P. corethrurus and an addition of oil palm bagasse. P. corethrurus had a high survival rate, and the addition of oil palm bagasse led to a greater growth and an increase in abundance of bacteria and fungi. The activity of P. corethrurus and the nutritional quality of oil palm bagasse had a significant impact on the removal of a larger amount of petroleum hydrocarbons from contaminated soil. We concluded that the endogeic earthworm P. corethrurus and oil palm bagasse acted synergistically to achieve a more effective removal of total petroleum hydrocarbons from soil. These results show the potential for using P. corethrurus to remove, either directly or indirectly, crude oil from soil.
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