Contamination levels and temporal trends of legacy and current-use brominated flame retardants in a dated sediment core from Beppu Bay, southwestern Japan

Hoang, Anh; Aono, Daichi; Watanabe, Ichiro; Kuwae, Michinobu; Kunisue, Tatsuya; Takahashi, Shin

doi:10.1016/j.chemosphere.2020.129180

Cited by 22 publications

(4 citation statements)

References 56 publications

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“…DBDPE was first detected in sediment layers corresponding to 2014 and increased up to 57 ng/g dw in the surface layer. Studies on sediment cores from North America (Yang R. et al, 2012), Japan (Hoang et al, 2021), and China (Zhang et al, 2009;Wu et al, 2012;Zhang et al, 2015) show similar increasing concentrations of DBDPE (Tables 1, 2), though DBDPE was generally detected in layers down to deposits from the 1980s or 1990s. BTBPE was detectable in the sediment down to layers corresponding to the early 1980s, though concentrations increased from the late 1990s, and reached the highest concentration in layers corresponding to the late 2010s.…”

Section: Cecsmentioning

confidence: 86%

Increasing Trends of Legacy and Emerging Organic Contaminants in a Dated Sediment Core From East-Africa

Nipen

Vogt

Bohlin‐Nizzetto

et al. 2022

Front. Environ. Sci.

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Temporal trends of industrial organic contaminants can show how environmental burdens respond to changes in production, regulation, and other anthropogenic and environmental factors. Numerous studies have documented such trends from the Northern Hemisphere, while there is very limited data in the literature from sub-Saharan Africa. We hypothesized that the temporal trends of legacy and contemporary industrial contaminants in sub-Saharan Africa could greatly differ from the regions in which many of these chemicals were initially produced and more extensively used. For this purpose, a dated sediment core covering six decades from a floodplain system in urban Dar es Salaam, Tanzania, was analysed. The samples were analysed for selected legacy persistent organic pollutants (POPs) [polychlorinated biphenyls (PCBs) and polybrominated biphenyl ethers (PBDEs)] and chemicals of emerging concern (CECs) [alternative brominated flame retardants (aBFRs), chlorinated paraffins (CPs), and dechloranes]. All groups of chemicals showed a steep increase in concentrations towards the uppermost sediment layers reflecting the more recent years. Concentrations of the individual compound groups in surface sediment were found in the order CPs >> aBFRs ∼ ∑25PBDEs > dechloranes ∼ ∑32PCBs. Time trends for the individual compounds and compound groups differed, with ∑32PCBs showing presence in sediments since at least the early 1960s, while some CECs first occurred in sediments corresponding to the last decade. Investigations into potential drivers for the observed trends showed that socioeconomic factors related to growth in population, economy, and waste generation have contributed to increasing concentrations of PBDEs, aBFRs, CPs, and Dechlorane Plus. Further monitoring of temporal trends of industrial organic contaminants in urban areas in the Global South is recommended.

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Section: Cecsmentioning

confidence: 86%

Increasing Trends of Legacy and Emerging Organic Contaminants in a Dated Sediment Core From East-Africa

Nipen

Vogt

Bohlin‐Nizzetto

et al. 2022

Front. Environ. Sci.

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“…The historical trends in the fluxes of OPEs and their concentrations in the sediment core were similar. This may be due to the stable sedimentation process in deep basins with fewer physical and biological mixing activities (Hoang et al, 2021). The OPEs inventory in this sediment core was estimated to be 1541 ng cm -2 .…”

Section: Inventorymentioning

confidence: 91%

Temporal trends of organophosphate esters in a sediment core from the tidal flat of Liao River estuary, Northeast China

Luo

Wang

et al. 2023

Front. Mar. Sci.

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The historical trends and inventory of organophosphate esters (OPEs) were investigated based on depth profiles of OPEs in sediment core collected from the tidal flat of the Liao River estuary in northeastern China. The concentration of ∑13OPEs in sediment core has increased continuously since records began, reaching a peak of 10.8 ng g-1 dry weight (dw) in the 1960s, then began to decline and fall to a low of 3.91 ng g-1 dw in the 1980s, before rising again and increasing to 20.4 ng g-1 dw in the 2000s. After a brief decline, It started to increase again and reached a peak of 27.0 ng g-1 dw in 2018. Tributyl-n-phosphate was found in each layer of the sediment core, accounting for 31.9 - 100% of ∑13OPEs. The fluxes of OPEs ranged from 46.5 to 105 ng cm-2 y-1 in the sediment layers deposited between 2007 and 2018. The inventory of OPEs in the sediment core was estimated to be 1541 ng cm-2. This work reports for the first time the historical contamination trends of OPEs in Chinese sediments, which is important for assessing the environmental risk of OPEs.

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“…Beppu Bay in southern Japan (Figure 1), the focus of this study, exhibits autumnal oxygen depletion in its bottom waters (Kameda and Fujiwara, 1995), resulting in the formation of sediment varves due to the absence of bioturbation (Kuwae et al, 2013). Radioactive dating of these sediments shows a high and constant sedimentation rate of ~1 cm years −1 in surface sediments, which provide undisturbed proxy records with high temporal precision ( 137 Cs, Kuwae et al, 2013, Takahashi et al, 2020; polychlorinated biphenyls, Takahashi et al, 2020; dichlorodiphenyltrichloroethane, Nishimuta et al, 2021; brominated fire retardants, Hoang et al, 2021; and microplastics, Masumoto et al, 2018). Such proxy records suggest that Beppu Bay sediments meet the requirements to act as potential candidate Global boundary Stratotype Section and Point (GSSP) for the basement of the Anthropocene or auxiliary stratotypes (Kuwae et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

The record of sedimentary spheroidal carbonaceous particles (SCPs) in Beppu Bay, southern Japan, compared to historical trends of industrial activity and atmospheric pollution: Further evidence for SCPs as a marker for Anthropocene industrialization

Inoue

Takenaka

Okudaira

et al. 2022

The Anthropocene Review

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Spheroidal carbonaceous particles (SCPs) are carbonaceous fly ash particles produced solely from industrial fossil fuel combustion. SCPs in sediments can be an indicator of past industrialization. We examined the sedimentary SCP record in Beppu Bay, southern Japan, and compared this record to historical trends of industrial activity and monitoring data for atmospheric pollutions in the region. Beppu Bay has varved sediments in the absence of bioturbation, providing an ideal situation for SCP study. Our results show that the temporal variation of SCP deposition is consistent with the trends of industrial activity and the temporal variation of status of atmospheric pollution. We conclude that undisturbed sediments such as Beppu Bay sediments have SCP records that adequately represent historical trends of industrial activity and atmospheric pollution in detail. These findings support that SCPs are a potential marker for the Anthropocene, characterized by industrialization.

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Contamination levels and temporal trends of legacy and current-use brominated flame retardants in a dated sediment core from Beppu Bay, southwestern Japan

Cited by 22 publications

References 56 publications

Increasing Trends of Legacy and Emerging Organic Contaminants in a Dated Sediment Core From East-Africa

Increasing Trends of Legacy and Emerging Organic Contaminants in a Dated Sediment Core From East-Africa

Temporal trends of organophosphate esters in a sediment core from the tidal flat of Liao River estuary, Northeast China

The record of sedimentary spheroidal carbonaceous particles (SCPs) in Beppu Bay, southern Japan, compared to historical trends of industrial activity and atmospheric pollution: Further evidence for SCPs as a marker for Anthropocene industrialization

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