Open Access Open Access  Restricted Access Subscription Access

doi:10.3808/jeil.202100058
Copyright © 2021 ISEIS. All rights reserved

Ecological Impact Analysis of Dispersants and Dispersed Oil: An Overview

X. D. Ye1 *, Z. W. Zhu1 *, F. Merlin2 *, M. Yang1 *, B. Chen1, K. Lee3, and B. Y. Zhang1 **

  1. Faculty of Engineering and Applied Science, Memorial University, St. John’s, NL A1B 3X5, Canada
  2. Oil Spill Response Consultant, Freelance 29200, France
  3. Fisheries and Oceans Canada, Ecosystem Science, Ottawa, ON K1A 0E6, Canada

*Co-first author: X. D. Ye, Z. W. Zhu, F. Merlin, and M. Yang.
Corresponding author. Tel.: +1 709-864-3301. E-mail address: bzhang@mun.ca (B. Y. Zhang).

Abstract


Soaring oil demand, as a result of industrial development, boosts oil exploration and production activities at sea, even into deeper and icier waters. The transportation of the oils, as well as the potential spill accidents and associated pollutions are thus increased. There is an urgent call for contingency planning with effective and eco-friendly oil spill cleanup responses. Dispersant applications can facilitate the breaking up of oil slicks into small oil droplets, allowing their rapid dispersion, dissolution, dilution and biodegradation in the water column. Dispersants have been recognized as effective oil treating agents and well adopted. Nearly 7 million liters of chemical dispersants, mostly Corexit® 9500A, were used after the Deepwater Horizon oil spill incident. However, debates over dispersants con- tinued with major concerns about their environmental impacts and the ecological toxicity, which need to be well reviewed and tackled. Therefore, this study summarized the recent lab- and meso-scale studies and field trials on the ecological impact analysis of dispersants and the chemically dispersed oils. By providing an up-to-date review of the ecological toxicity and environmental impact assessment, this study would help to bridge the knowledge gaps in the field and facilitate future dispersant applications.

Keywords: dispersants, dispersed oil, marine oil spill, ecological impact, toxicity


Full Text:

PDF

Supplementary Files:

Refbacks

  • There are currently no refbacks.