Occurrence and Risk Assessment of Polybrominated Diphenyl Ethers in Surface Water and Sediment of Nahoon River Estuary, South Africa Article Swipe

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Chinemerem Ruth Ohoro , Abiodun Adeniji , Lucy Semerjian , Anthony I. Okoh , Omobola O. Okoh ·

YOU? · · 2021 · Open Access · · DOI: https://doi.org/10.21203/rs.3.rs-913715/v1

The concentrations, potential sources, and compositional profile of PBDEs in the surface water and sediment of Nahoon Estuary, East London, South Africa, were investigated with solid-phase extraction and ultra-sonication, respectively, followed by gas-chromatography-electron capture detection. The seasonal range of the contaminants’ concentrations in water and sediment samples in spring season were ƩPBDE 329 ± 48.3 ng/L (25.32–785 ng/L) and ƩPBDE 4.19 ± 0.35 ng/g dw (1.91–6.57 ng/g), but ƩPBDE 62.1 ± 1.50 ng/L (30.1–110 ng/L) and ƩPBDE 65.4 ± 15.9 ng/g dw (1.98–235 ng/g) in summer, respectively. NH1 (first sampling point) was the most contaminated site with PBDE in the Estuary. The potential source of pollution is attributed to the stormwater runoff from a creek emptying directly into the Estuary. This study's dominant PBDE congener is BDE- 17, ranging from below detection limit to 247 ng/L and 0.14–32.1 ng/g in water and sediment samples, respectively. Most commonly detected at all the sites were BDE- 17, 47, 66, and 100. Most BDE- 153 and 183 are found in sediment in agreement with the fact that higher brominated congeners of PBDE adsorb to solid materials. There was no correlation between the congeners and organic carbon and organic matter. However, the human health risk assessment conducted revealed that the PBDE concentration detected in the estuary pose low eco-toxicological risk. Nevertheless, constant monitoring should be ensured to see that the river remains safe for all the users, as it serves as a form of recreation to the public and a catchment to some neighbourhoods around the river.

Related Topics

Estuary

Environmental Chemistry

Sediment

Environmental Science

Environmental Engineering

Ecology

Chromatography

Biology

Geotechnical Engineering

Paleontology

Organic Chemistry

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Estuary Polybrominated diphenyl ethers Environmental chemistry Sediment Environmental science Congener Pollution Surface water Surface runoff Contamination Particulates Detection limit Hydrology (agriculture) Chemistry Pollutant Oceanography Geology Environmental engineering Ecology Chromatography Biology Geotechnical engineering Paleontology Organic chemistry

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Type: preprint
Language: en
Landing Page: https://doi.org/10.21203/rs.3.rs-913715/v1
PDF: https://www.researchsquare.com/article/rs-913715/latest.pdf
OA Status: gold
References: 83
Related Works: 10
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DOI: https://doi.org/10.21203/rs.3.rs-913715/v1

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Title: Occurrence and Risk Assessment of Polybrominated Diphenyl Ethers in Surface Water and Sediment of Nahoon River Estuary, South Africa

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Type: preprint

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Language: en

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Publication year: 2021

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Publication date: 2021-10-25

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Authors: Chinemerem Ruth Ohoro, Abiodun Adeniji, Lucy Semerjian, Anthony I. Okoh, Omobola O. Okoh

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Landing page: https://doi.org/10.21203/rs.3.rs-913715/v1

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Concepts: Estuary, Polybrominated diphenyl ethers, Environmental chemistry, Sediment, Environmental science, Congener, Pollution, Surface water, Surface runoff, Contamination, Particulates, Detection limit, Hydrology (agriculture), Chemistry, Pollutant, Oceanography, Geology, Environmental engineering, Ecology, Chromatography, Biology, Geotechnical engineering, Paleontology, Organic chemistry

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