Ecological risk assessment and corrective actions for dioxin-polluted sediment in a chemical plant's brine water storage pond.

Huang, C-W; Huang, W-Y; Lin, C; Li, Y-L; Huang, T-P; Bui, X-T; Ngo, HH

Ecological risk assessment and corrective actions for dioxin-polluted sediment in a chemical plant's brine water storage pond.

Huang, C-W Huang, W-Y Lin, C Li, Y-L Huang, T-P Bui, X-T Ngo, HH

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Sci Total Environ, 2023, 859, (Pt 1), pp. 160239
Issue Date:: 2023-02-10

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Field	Value	Language
dc.contributor.author	Huang, C-W
dc.contributor.author	Huang, W-Y
dc.contributor.author	Lin, C
dc.contributor.author	Li, Y-L
dc.contributor.author	Huang, T-P
dc.contributor.author	Bui, X-T
dc.contributor.author	Ngo, HH
dc.date.accessioned	2024-02-01T03:13:49Z
dc.date.available	2022-11-13
dc.date.available	2024-02-01T03:13:49Z
dc.date.issued	2023-02-10
dc.identifier.citation	Sci Total Environ, 2023, 859, (Pt 1), pp. 160239
dc.identifier.issn	0048-9697
dc.identifier.issn	1879-1026
dc.identifier.uri	http://hdl.handle.net/10453/175200
dc.description.abstract	Despite the known high toxicity of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs, or dioxins), there are few case studies of PCDD/Fs contamination in sediment and there remains much to learn regarding their ecological impact. In this study, we performed an environmental risk assessment of a brine water storage pond near a chemical plant with high PCDD/Fs pollution potential before and after corrective actions. We found PCDD/F accumulation in the pond's fish and crab from the brine water storage pond, and the PCDD/Fs concentrations in biota higher than Taiwan's food safety standard (3.5 pg-TEQ/g). Furthermore, we found a high degree of pollution using different indices, including contamination factor (CF), modified degree of contamination (mCd), and pollution index (PI), in the pond's sediment. Before corrective actions, we also found high risk in the PCDD/F contamination in the sediment using various biological risk indices, including potential ecological risk index (RI) and risk quotient (RQ). After the corrective actions, including institutional/engineering control and remediation, the CF, mCd, and PI had decreased by 20-41 % and RI and RQ by 41-56 %. In addition, despite the slight reduction of pollution and risk index values in the whole pond, significant reduction was observed in the sediment of highly polluted area A owing to the lower disturbing suction dredging. In conclusion, the corrective actions used in this study helped decrease the pollution and ecological risk associated with this site's PCDD/Fs polluted sediment to some extent, suggesting that contamination and risk could be reduced to acceptable levels if these corrective actions are continued.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Elsevier
dc.relation.ispartof	Sci Total Environ
dc.relation.isbasedon	10.1016/j.scitotenv.2022.160239
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Sciences
dc.subject.mesh	Animals
dc.subject.mesh	Polychlorinated Dibenzodioxins
dc.subject.mesh	Dioxins
dc.subject.mesh	Dibenzofurans, Polychlorinated
dc.subject.mesh	Water
dc.subject.mesh	Dibenzofurans
dc.subject.mesh	Environmental Monitoring
dc.subject.mesh	Water Pollutants, Chemical
dc.subject.mesh	Benzofurans
dc.subject.mesh	Risk Assessment
dc.subject.mesh	Animals
dc.subject.mesh	Water
dc.subject.mesh	Dioxins
dc.subject.mesh	Benzofurans
dc.subject.mesh	Water Pollutants, Chemical
dc.subject.mesh	Risk Assessment
dc.subject.mesh	Environmental Monitoring
dc.subject.mesh	Polychlorinated Dibenzodioxins
dc.subject.mesh	Dibenzofurans, Polychlorinated
dc.subject.mesh	Dibenzofurans
dc.subject.mesh	Animals
dc.subject.mesh	Polychlorinated Dibenzodioxins
dc.subject.mesh	Dioxins
dc.subject.mesh	Dibenzofurans, Polychlorinated
dc.subject.mesh	Water
dc.subject.mesh	Dibenzofurans
dc.subject.mesh	Environmental Monitoring
dc.subject.mesh	Water Pollutants, Chemical
dc.subject.mesh	Benzofurans
dc.subject.mesh	Risk Assessment
dc.title	Ecological risk assessment and corrective actions for dioxin-polluted sediment in a chemical plant's brine water storage pond.
dc.type	Journal Article
utslib.citation.volume	859
utslib.location.activity	Netherlands
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access	*
dc.date.updated	2024-02-01T03:13:48Z
pubs.issue	Pt 1
pubs.publication-status	Published
pubs.volume	859
utslib.citation.issue	Pt 1

Abstract:

Despite the known high toxicity of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs, or dioxins), there are few case studies of PCDD/Fs contamination in sediment and there remains much to learn regarding their ecological impact. In this study, we performed an environmental risk assessment of a brine water storage pond near a chemical plant with high PCDD/Fs pollution potential before and after corrective actions. We found PCDD/F accumulation in the pond's fish and crab from the brine water storage pond, and the PCDD/Fs concentrations in biota higher than Taiwan's food safety standard (3.5 pg-TEQ/g). Furthermore, we found a high degree of pollution using different indices, including contamination factor (CF), modified degree of contamination (mCd), and pollution index (PI), in the pond's sediment. Before corrective actions, we also found high risk in the PCDD/F contamination in the sediment using various biological risk indices, including potential ecological risk index (RI) and risk quotient (RQ). After the corrective actions, including institutional/engineering control and remediation, the CF, mCd, and PI had decreased by 20-41 % and RI and RQ by 41-56 %. In addition, despite the slight reduction of pollution and risk index values in the whole pond, significant reduction was observed in the sediment of highly polluted area A owing to the lower disturbing suction dredging. In conclusion, the corrective actions used in this study helped decrease the pollution and ecological risk associated with this site's PCDD/Fs polluted sediment to some extent, suggesting that contamination and risk could be reduced to acceptable levels if these corrective actions are continued.

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http://hdl.handle.net/10453/175200