The piscine bioconcentration characteristics of cyclic and linear oligomeric permethylsiloxanes

Annelin, R. B.; Frye, Cecil L.

doi:10.1016/0048-9697(89)90002-8

Cited by 41 publications

(23 citation statements)

References 12 publications

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“…Uptake levels of cyclic and linear siloxanes such as D 4 , Ds, L 4 , Ls etc. have been determined by Annelin and Frye [33]. According to this study, the uptake of cyclic siloxanes by fish decreases sharply with increasing molecular weight.…”

Section: Bioconcentration Factor (K B )mentioning

confidence: 98%

Eco-Relevant Properties of Selected Organosilicon Materials

Mazzoni¹,

Roy²,

Grigoras³

1997

The Handbook of Environmental Chemistry

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Section: Bioconcentration Factor (K B )mentioning

confidence: 98%

Eco-Relevant Properties of Selected Organosilicon Materials

Mazzoni¹,

Roy²,

Grigoras³

1997

The Handbook of Environmental Chemistry

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“…Previous studies in soil concluded that while DivlSD is biodegradabie, the iarge PDMS poiymer does not biodegrade. This could be due to the fact that PDMS molecules larger than 600 MW do not appear to permeate cell membranes (Annelin and Frye 1989).…”

Section: Sample Analysismentioning

confidence: 99%

Fate and Effects of Silicone Polymer During the Composting Process

Smith

Lehmann

Narayan

et al. 1998

Compost Science & Utilization

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Silicone (polydimethylsiloxanes, or PDMS) fluids are widely used in industrial and consumer products, and may find their way into municipal biosolids that are eventually applied to the land. In soil PDMS breaks down into dimethylsilanediol which is then either volatilized or biodegraded. Since biosolids are often composted prior to land application, this paper investigates fate and effects of PDMS in compost. PDMS (0,3, or 30g) was added to 180g of matured compost and incubated at 58°C for six weeks. Some treatments also had 180g of wood ash and/or additions of 15g of alfalfa every two weeks. Releases of CO, from all treatments were identical to their respective controls (no PDMS), indicating no effects from these extremely high PDMS levels on the composting process. Wood ash caused an initial delay in CO, release after which results were similar to treatments without wood ash. After six weeks, PDMS was unchanged in molecular weight and concentration, indicating that it will be transferred intact, after composting, to the land where it can degrade in the presence of soil.

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“…3b), indicating that L8-L10 perhaps accumulate in human fat during non-occupational exposure. Several previous studies predicted that linear methyl siloxanes with molecular weight higher than 1000 could not bio-accumulate because the molecules are too large to pass through biological membranes (Annelin and Frye, 1989). However, homologues with molecular weight lower than 1000, such as L8-L10, perhaps pass through biological membranes, and then distribute in tissue/fat.…”

Section: Accumulation and Eliminationmentioning

confidence: 99%

Methyl siloxanes in environmental matrices and human plasma/fat from both general industries and residential areas in China

Shi

Liu

et al. 2015

Science of The Total Environment

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• Siloxanes are detected in additives/products from general industries in China.• Their plasma concentrations in industrial workers were higher than reference group.• Siloxanes are more likely to distribute in human fat than plasma.• Linear but not cyclic compounds had an apparent accumulation in human fat.• Population's half-lives of L8-L10 in human fat were about 1.49-1.80 years. a b s t r a c t a r t i c l e i n f o We investigated human exposure to methyl siloxanes in three general industries (building, automobile, and textile industries) and residential areas in China. Usage volumes of methyl siloxanes per capita in these industries were 2-5 orders of magnitudes higher than those in residential areas. Methyl siloxane concentrations in indoor air and dust samples from industrial facilities were 1-3 orders of magnitudes higher than those in residential houses. Both cyclic (D4-D6) and linear (L5-L16) siloxanes were detected in plasma of industrial workers (1.00-252 ng/mL, detection frequencies = 3.7-71%, n = 528), while only cyclic compounds (D4-D6) were detected in plasma of general population (n = 519) with much lower concentrations (1.10-7.50 ng/mL) and detection frequencies (1.7-3.7%). During the occupational exposure, anti-dust mask can reduce 30% of intake of cyclic siloxanes and 74% of intake of linear siloxanes, respectively. In addition, PM-10 could elevate intake of linear siloxanes. Calculated fat-plasma partition ratios of methyl siloxanes (D4-D6, L6-L11) in the present study were 5.3-241 mL/g. Linear rather than cyclic siloxanes had an apparent accumulation in abdominal fat. Population's half-lives of L8-L10 in abdominal fat of general population were approximately 1.49-1.80 years.

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The piscine bioconcentration characteristics of cyclic and linear oligomeric permethylsiloxanes

Cited by 41 publications

References 12 publications

Eco-Relevant Properties of Selected Organosilicon Materials

Eco-Relevant Properties of Selected Organosilicon Materials

Fate and Effects of Silicone Polymer During the Composting Process

Methyl siloxanes in environmental matrices and human plasma/fat from both general industries and residential areas in China

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