Bioaccumulation and trophodynamics of cyclic methylsiloxanes in the food web of a large subtropical lake in China

Su, Shuai; Cheng, Jiali; Tang, Zhenwu; Shi, Rui; Lyu, Yang

doi:10.1016/j.jhazmat.2021.125354

Cited by 9 publications

(3 citation statements)

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“…9−11 However, the long-term toxicity and bioaccumulation of methylsiloxanes are still unclear and need further investigation. 10,12 Considering the differences in disciplines, we clarify that air only refers to the gas phase, aerosol refers to the particulate matter in the air/atmosphere, and dust refers to deposited particulate matter on the ground. As an emerging class of pollutant with relatively high volatility, VMS have been found mainly in the gas phase, such as indoor air 13 and outdoor air.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the health effects, VMS have been studied intensively. , VMS were found in the plasma of residents, , and hydrolyzed products of methylsiloxanes were detected in the human metabolites . Exposure to VMS can cause liver, endometrial, and respiratory damage, endocrine disturbances, and adverse immune responses. − However, the long-term toxicity and bioaccumulation of methylsiloxanes are still unclear and need further investigation. , …”

Section: Introductionmentioning

confidence: 99%

“… 9 − 11 However, the long-term toxicity and bioaccumulation of methylsiloxanes are still unclear and need further investigation. 10 , 12 …”

Section: Introductionmentioning

confidence: 99%

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Methylsiloxanes from Vehicle Emissions Detected in Aerosol Particles

Yao,

Holzinger,

Materić

et al. 2023

Environ. Sci. Technol.

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Methylsiloxanes have gained growing attention as emerging pollutants due to their toxicity to organisms. As man-made chemicals with no natural source, most research to date has focused on volatile methylsiloxanes from personal care or household products and industrial processes. Here, we show that methylsiloxanes can be found in primary aerosol particles emitted by vehicles based on aerosol samples collected in two tunnels in São Paulo, Brazil. The aerosol samples were analyzed with thermal desorption-proton transfer reaction-mass spectrometry (TD-PTR-MS), and methylsiloxanes were identified and quantified in the mass spectra based on the natural abundance of silicon isotopes. Various methylsiloxanes and derivatives were found in aerosol particles from both tunnels. The concentrations of methylsiloxanes and derivatives ranged 37.7–377 ng m –3 , and the relative fractions in organic aerosols were 0.78–1.9%. The concentrations of methylsiloxanes exhibited a significant correlation with both unburned lubricating oils and organic aerosol mass. The emission factors of methylsiloxanes averaged 1.16 ± 0.59 mg kg –1 of burned fuel for light-duty vehicles and 1.53 ± 0.37 mg kg –1 for heavy-duty vehicles. Global annual emissions of methylsiloxanes in vehicle-emitted aerosols were estimated to range from 0.0035 to 0.0060 Tg, underscoring the significant yet largely unknown potential for health and climate impacts.

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Section: Introductionmentioning

confidence: 99%