Is hull cleaning wastewater a potential source of developmental toxicity on coastal non-target organisms? SCIE SCOPUS

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Title
Is hull cleaning wastewater a potential source of developmental toxicity on coastal non-target organisms?
Alternative Title
Is hull cleaning wastewater a potential source of developmental toxicity on coastal non-target organisms?
Author(s)
Choi, Youmi; Kim, Moonkoo; Hong, Chang Pyo; Kang, Jung Hoon; Jung, Jee-Hyun
KIOST Author(s)
Choi, Youmi(최유미)Kim, Moonkoo(김문구)Kang, Jung Hoon(강정훈)Jung, Jee Hyun(정지현)
Publication Year
2020-10
Abstract
Chemical contaminants can be discharged by vessel hull cleaning processes, such as scraping, jet spraying, and painting, all of which produce readily transportable contaminants into the marine environment, where they are referred to as 'hotspots' of contamination in coastal areas. However, many countries have not yet established effective evaluation methods for disposal of waste mixtures or management guidelines for areas of hull cleaning. To define the toxic effects of wastewater from vessel hull cleaning in dry docks on resident non-target organisms, we investigated the chemical concentrations and developmental toxicity on embryonic flounder, which is an organism sensitive to chemical contamination. In this study, the dominant inorganic metal discharged was zinc when cleaning Ship A (300 tons) and copper for Ship B (5,000 tons). The wastewater from high-pressure water blasting (WHPB) of Ship A (300 tons) and Ship B (5,000 tons) produced a largely overlapping suite of developmental malformations including pericardial edema, spinal curvature, and tail fin defects. Forty-eight hours after exposure, the frequency percentage of malformation began to increase in embryos exposed to a 500-fold dilution of WHPB from Ships A and B. We performed transcriptome sequencing to characterize the toxicological developmental effects of WHPB exposure at the molecular level. The results of the analysis revealed significantly altered expression of genes associated with muscle cell differentiation, actin-mediated cell contraction, and nervous system development (cutoff P < 0.01) in embryonic flounder exposed to high-pressure cleaning effluent from Ship A. Genes associated with chromatin remodeling, cell cycling, and insulin receptor signaling pathways were significantly altered in embryonic flounder exposed to WHPB of Ship B (cutoff P < 0.01). These findings provide a greater understanding of the developmental toxicity and potential effects of WHPB effluent on coastal embryonic fish. Furthermore, our results could inform WHPB effluent management practices to reduce impacts on non-target coastal organisms.
ISSN
0166-445X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/37588
DOI
10.1016/j.aquatox.2020.105615
Bibliographic Citation
AQUATIC TOXICOLOGY, v.227, 2020
Publisher
ELSEVIER
Keywords
High-pressure water blasting; Antifouling; Toxicity; Malformation; NGS; Embryos
Type
Article
Language
English
Document Type
Article; Proceedings Paper
Publisher
ELSEVIER
Related Researcher
Research Interests

Biological oceanography,Zooplankton ecology,Introduction and dispersion of foreign species,생물해양학,동물플랑크톤 생리,생태,외래종 유입,확산

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