Best available technique for the recovery of marine benthic communities in a gravel shore after the oil spill: A mesocosm-based sediment triad assessment

Taewoo Kim, Changkeun Lee, Junghyun Lee, Hanna Bae, Junsung Noh, Seongjin Hong, Bong Oh Kwon, Jae Jin Kim, Un Hyuk Yim, Gap Soo Chang, John P. Giesy, Jong Seong Khim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Ecotoxicological effects of spilled oils are well documented, but study of recovery of marine benthic communities is limited. Long-term recovery of hard bottom communities during physical and biological remediations after a spill was monitored. A 60-day experiment was conducted using a mesocosm with monitoring of eight endpoints by use of the sediment quality triad (SQT). First, physical treatment of hot water + high pressure flushing maximally removed residual oils (max=93%), showing the greatest recovery among SQT variables (mean=72%). Physical cleanup generally involved adverse effects such as depression of the microphytobenthic community during the initial period. Next, biological treatments, such as fertilizer, emulsifier, enzyme and augmentation of the microbes, all facilitated removal of oil (max=66%) enhancing ecological recovery. Analysis of the microbiome confirmed that oil-degrading bacteria, such as Dietzia sp. and Rosevarius sp. were present. A mixed bioremediation, including fertilizer + multi-enzyme + microbes (FMeM) maximized efficacy of remediation as indicated by SQT parameters (mean=47%). Natural attenuation with “no treatment” showed comparable recovery to other remediations. Considering economic availability, environmental performance, and technical applicability, of currently available techniques, combined treatments of physical removal via hand wiping followed by FMeM could be most effective for recovery of the rocky shore benthic community.

Original languageEnglish
Article number128945
JournalJournal of hazardous materials
Volume435
DOIs
Publication statusPublished - 2022 Aug 5

Bibliographical note

Publisher Copyright:
© 2022 The Authors

Keywords

  • Benthic community response
  • Biological recovery
  • Ecological restoration
  • Natural attenuation
  • Physical cleanup

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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