Abstract
While various bioremediation techniques have been widely used at oil spill sites, the in situ efficiency of such techniques on recovering the benthic communities in intertidal areas has not been quantified. Here, the performance of several bioremediation tools such as emulsifiers, multi-enzyme liquid (MEL), microbes, and rice-straw was evaluated by a 90-days semi-field experiment, particularly targeting recovery of benthic community. Temporal efficiency in the removal of sedimentary total petroleum hydrocarbons (TPH), reduction of residual toxicity, and recovery of bacterial diversity, microalgal growth, and benthic production was comprehensively determined. Concentrations of TPH and amphipod mortality for all treatments rapidly decreased within the first 10 days. In addition, the density of bacteria and microphytobenthos generally increased over time for all treatments, indicating recovery in the benthic community health. However, the recovery of some nitrifying bacteria, such as the class Nitrospinia (which are sensitive to oil components) remained incomplete (13–56%) during 90 days. Combination of microbe treatments showed rapid and effective for recovering the benthic community, but after 90 days, all treatments showed high recovery efficiency. Of consideration, the “no action” treatment showed a similar level of recovery to those of microbe and MEL treatments, indicating that the natural recovery process could prevail in certain situations. “Among various bioremediation techniques tested, the microbes was rapid and effective in restoring benthic community health.”
Original language | English |
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Pages (from-to) | 137-145 |
Number of pages | 9 |
Journal | Environmental Pollution |
Volume | 252 |
DOIs | |
Publication status | Published - 2019 Sept |
Bibliographical note
Funding Information:This work was supported by projects entitled “Marine ecosystem-based analysis and decision-making support system development for marine spatial planning (20170325)” and “Oil spill environmental Impact Assessment and Environmental Restoration (20090001)” funded by the Ministry of Oceans and Fisheries of Korea (MOF) granted to JSK. This work was also supported by the project entitled “Quantification of self-purification capacity of coastal wetlands through understanding of chemodynamics of land-driven coastal pollutants (NRF-2017R1E1A1A01075067)” funded by the Ministry of Science and ICT, Korea.
Funding Information:
This work was supported by projects entitled “ Marine ecosystem-based analysis and decision-making support system development for marine spatial planning ( 20170325 )” and “ Oil spill environmental Impact Assessment and Environmental Restoration ( 20090001 )” funded by the Ministry of Oceans and Fisheries of Korea (MOF) granted to JSK. This work was also supported by the project entitled “Quantification of self-purification capacity of coastal wetlands through understanding of chemodynamics of land-driven coastal pollutants ( NRF - 2017R1E1A1A01075067 )” funded by the Ministry of Science and ICT, Korea .
Publisher Copyright:
© 2019 Elsevier Ltd
Keywords
- Benthic community
- Oil spill
- PAH-Degrading bacteria
- PAH-Vulnerable bacteria
- Restoration
- Semi-field experiment
ASJC Scopus subject areas
- Toxicology
- Pollution
- Health, Toxicology and Mutagenesis