Aromatic amine antioxidants (AAs) and p-phenylenediamines-quinones (PPD-Qs) in e-waste recycling industry park: Occupational exposure and liver X receptors (LXRs) disruption potential

Environment International, Journal Year: 2024, Volume and Issue: 186, P. 108609 - 108609

Published: April 1, 2024

Recently, evidence of aromatic amine antioxidants (AAs) existence in the dust electronic waste (e-waste) dismantling area has been exposed. However, there is limited studies investigating occupational exposure and toxicity associated with AAs their transformation products (p-phenylenediamines-quinones, i.e., PPD-Qs). In this study, 115 42 hand wipe samples collected from an e-waste recycling industrial park central China were analyzed for 19 6 PPD-Qs. Notably, median concentration ∑6PPD-Qs (1,110 ng/g 1,970 ng/m2) was significantly higher (p < 0.05, Mann-Whitney U test) than that ∑6PPDs (147 34.0 wipes. Among detected analytes, 4-phenylaminodiphenylamine quinone (DPPD-Q) (median: 781 ng/g) 1,4-Bis(2-naphthylamino) benzene (DNPD-Q) 156 ng/g), particularly prominent, which first area. Occupational assessments nuclear receptor interference ability, conducted through estimated daily intake (EDI) molecular docking analysis, respectively, indicated significant to PPD-Qs suggested prioritized Liver X receptors (LXRs) disruption potential PPDs The study provides considerable levels e-waste-related underscores importance assessing effects.

Language: Английский

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Toxicity of 6PPD-quinone to four freshwater invertebrate species

Environmental Pollution, Journal Year: 2023, Volume and Issue: 337, P. 122512 - 122512

Published: Sept. 4, 2023

Language: Английский

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Recycled tire rubber materials in the spotlight. Determination of hazardous and lethal substances

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 929, P. 172674 - 172674

Published: April 23, 2024

One way of recycling end-of-life tires is by shredding them to obtain crumb rubber, a microplastic material (<0.5 mm), used as infill in artificial turf sports fields or playground flooring. There emerging concern about the health and environmental consequences that this type surfaces can cause. This research aims develop an analytical methodology able determine 11 compounds concern, including antiozonants such N-1,3-dimethylbutyl-N′-phenyl-p-phenylenediamine (6PPD) N, N´-diphenyl-1,4-phenylenediamine (DPPD), vulcanization crosslinking agents, N-cyclohexylbenzothiazole-2-sulfenamide (CBS), 1,3-di-o-tolylguanidine (DTG) hexamethoxymethylmelamine (HMMM) from tire rubber. Ultrasound assisted extraction followed liquid chromatography coupled tandem mass spectrometry (UAE-LC-MS/MS) validated demonstrating suitability. The applied monitor target forty real rubber samples different origin including, football pitches, outdoor indoor playgrounds, urban pavements, commercial samples, tires. Several alternative materials, sand, cork granulates, thermoplastic elastomers coconut fibres, are also collected analysed. All analytes identified quantified samples. antiozonant 6PPD present at highest concentrations up 0.2 % new synthetic fields. rubber-derived chemical 6PPD-quinone (2-((4-methylpentan-2-yl)amino)-5-(phenylamino)cyclohexa-2,5-diene-1,4-dione), recently linked acute mortality salmons, found all types attaining 40 μg g−1 pitches. agent HMMM detected most playing surfaces, 36 g−1. tested alternatives free compounds. To best our knowledge, study largest considering particles first focus on these playgrounds analysis HMMM, DTG material.

Language: Английский

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Impact of Microplastic on Freshwater Sediment Biogeochemistry and Microbial Communities Is Polymer Specific

Water, Journal Year: 2024, Volume and Issue: 16(2), P. 348 - 348

Published: Jan. 20, 2024

Plastic debris is a growing threat in freshwater ecosystems and transport models predict that many plastics will sink to the benthos. Among most common found Laurentian Great Lakes sediments are polyethylene terephthalate (especially fibers; PET), polyvinylchloride (particles; PVC), styrene-butadiene rubber resulting from tire wear (“crumb rubber”; SBR). These materials vary substantially physical chemical properties, their impacts on benthic biogeochemistry microbial community structure function largely unknown. We used microcosm approach evaluate impact of these three benthic-pelagic coupling, sediment using Irondequoit Bay, major embayment Lake Ontario Rochester, New York, USA. Benthic metabolism nitrogen phosphorous cycling were all uniquely impacted by different polymers. PET fibers PVC particles demonstrated unique effects, with decreased ecosystem containing greater nutrient uptake PVC. Microbial diversity was reduced treatments plastic, but SBR had substantial function, increasing relative importance metabolic pathways such as hydrocarbon degradation sulfur metabolism. Our results suggest individual polymers have benthos, divergent implications for function. This provides deeper insight into myriad ways plastic pollution may aquatic help inform risk assessment policy interventions highlighting which pose greatest risk.

Language: Английский

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Screening and environmental risk assessment of VOCs preferential pollutants in net flavor rubber-modified asphalt based on the information entropy method

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 420, P. 135616 - 135616

Published: March 1, 2024

Language: Английский

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