Nationwide monitoring of cyclic and linear siloxanes in sediment and bivalves from Korean coastal waters: Occurrence, geographical distribution, and bioaccumulation potential

Chen, Wen-Ming; Kang, Yu-Jin; Lee, Hyun-Kyung; Lee, Moonjin; Moon, Hyo‐Bang

doi:10.1016/j.marpolbul.2022.114201

Cited by 6 publications

(12 citation statements)

References 47 publications

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“…Sample pretreatment procedures, compounds, reagents, and instruments have referred to our published studies (Lee et al, 2018a;Chen et al, 2022). Briefly, we added mass-labelled D4, D5, and D6 (200 ng each) as internal standards to the sediment samples.…”

Section: Sample Pretreatment and Analysismentioning

confidence: 99%

“…The instrument was installed with a DB-5MS capillary column (30 m, 0.25 mm i.d., 0.25 μm f.t.). Setting parameters for the analytical instrument have been referred to published literature (Lee et al, 2018a;Chen et al, 2022). Briefly, the instrument temperature rise procedure was as follows: 40°C for 2 min -220°C at 20°C/min -280°C at 5°C/min -300°C for 5 min.…”

Section: Sample Pretreatment and Analysismentioning

confidence: 99%

Section: Quality Controlmentioning

confidence: 99%

“…Due to the widespread consumption of siloxanes, certain levels of siloxanes inevitably exist in the indoor environment compartments (Lee et al, 2018a;Chen et al, 2022). To avoid background contamination, a strict quality control (QC) protocol was implemented throughout the experiment and the GC-MS instrumentation (Chen et al, 2022). Cosmetics and PCPs were prohibited from being contacted by laboratory personnel during the entire experimental procedure, and all experimental appliances were precleaned with acetone.…”

Section: Quality Controlmentioning

confidence: 99%

“…Siloxanes are easily adsorbed on suspended particles and eventually deposit into underlying sediment (Wang et al, 2013b;Zhang et al, 2018;Pelletier et al, 2022). Thus, sediment acts as an important sink for siloxane contamination in the aquatic ecosystem (Mackay et al, 2015;Chen et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Spatial distribution and temporal trends of cyclic and linear siloxanes in sediment from semi-enclosed and industrialized bays of Korea, in 2013 and 2021

et al. 2023

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Although siloxanes are contaminants of emerging concerns, limited studies have been conducted on contamination and time trends in siloxanes from aquatic environments worldwide. To date, most previous studies have focused on the environmental relevance of cyclic siloxanes in coastal environments. In the present study, cyclic and linear siloxanes were measured in sediment collected from semi-enclosed bays in Korea in 2013 and 2021 to assess occurrence, spatial distribution, temporal trends, and ecological risks. Almost all siloxanes were detected in all sediment samples, indicating continuous contamination for the last decade. The concentrations of cyclic siloxanes in sediment were approximately two times higher than those of linear siloxanes. Decamethylcyclopentasiloxane (D5) and dodecamethylcyclohexasiloxane (D6) were predominantly detected in all sediment samples, possibly due to their high consumption and strong resistance. The overall concentrations of siloxanes in sediment gradually decreased from inner to outer parts of the bays, suggesting that industrial activities largely contributed to siloxane contamination. Moreover, the highest concentrations of siloxanes in both sampling years were observed in sediment near the outfall of wastewater treatment plant, implying a potential source in the coastal environment. Siloxane concentrations in sediment were significantly correlated with sedimentary organic carbon. The concentrations of siloxanes in sediment were not significantly different between 2013 and 2021, indicating ongoing contamination. The concentrations of D5 and D6 in our sediment samples showed a limited potential to pose a threat to benthic organisms.

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Section: Sample Pretreatment and Analysismentioning

confidence: 99%

Section: Sample Pretreatment and Analysismentioning

confidence: 99%