Concentrations and distributions of polybrominated diphenyl ethers and novel brominated flame retardants in tree bark and human hair from Yunnan Province, China

Yuan, Haodong; Jin, Jun; Bai, Yao; Li, Qiuxu; Wang, Ying; Hu, Jicheng

doi:10.1016/j.chemosphere.2016.03.132

Cited by 28 publications

(5 citation statements)

References 31 publications

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“…The analyte concentrations in the blank samples were very low (<10% of the concentrations in the samples) and the signal‐to‐noise ratios were < 10; thus the concentrations in the samples were not blank‐corrected. Wang et al (), Ma and colleagues (2016), Yuan and associates (), and Ma et al () have previously documented the method.…”

Section: Methodsmentioning

confidence: 99%

Different organophosphate flame retardant and metabolite concentrations in urine from male and female university students in Beijing and an assessment of exposure via indoor dust

Dong

Wang

et al. 2019

Enviro Toxic and Chemistry

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Organophosphate flame retardants (OPFRs) have been found in human samples and associated with adverse health effects. In the present study, OPFR and dialkyl and diaryl phosphate (DAP) concentrations in human urine were determined and differences in the concentrations in urine from males and females were investigated. Urine samples from 22 male and 26 female university students, paired dust samples from the dormitories (13 each for males and females), and 10 dust samples from university teaching buildings were analyzed. The tri‐o‐cresyl phosphate (TOCP), tri‐p‐cresyl phosphate (TPCP), and tris(2‐chloroisopropyl)phosphate (TCIPP) concentrations were significantly higher (p = 0.049, 0.023, and 0.027, respectively) in urine from the female students than in urine from the male students. Similar differences were found between males and females in terms of OPFR exposure and OPFR concentrations in urine for three‐fourths of the OPFRs. Questionnaire answers and calculations indicated that disparities in OPFR concentrations in urine were mainly caused by females spending much more time than males in dormitories. Organophosphate flame retardants may pose degrees of health risk similar to those of polybrominated diphenyl ethers (PBDEs), and this must be considered when making decisions about controlling flame retardants. We are not aware of any previous studies that simultaneously monitor OPFRs and DAPs in human urine in China. Environ Toxicol Chem 2019;38:760–768. © 2019 SETAC

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Section: Methodsmentioning

confidence: 99%

Different organophosphate flame retardant and metabolite concentrations in urine from male and female university students in Beijing and an assessment of exposure via indoor dust

Dong

Wang

et al. 2019

Enviro Toxic and Chemistry

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“…Some scholars estimate that the global output of NBFRs is estimated to be about 100,000–180,000 tons per year [ 7 ]. In recent years, with the mass production and use of NBFRs, they have been widely present in various environmental media, even human blood [ 8 , 9 ]. Hexabromobenzene (HBB), pentabromotoluene (PBT), pentabromobenzyl acrylateare (PBBA) and pentabromoethylbenzene (PBEB) are considered as four important currently used NBFRs with respect to production and consumption all over the world [ 10 , 11 , 12 , 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Photodegradation Kinetics and Solvent Effect of New Brominated Flame Retardants (NBFRS) in Liquid Medium

Jin

et al. 2022

IJERPH

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The photolysis of four typical NBFRs, hexabromobenzene (HBB), pentabromotoluene (PBT), pentabromobenzyl acrylateare (PBBA) and pentabromoethylbenzene (PBEB), were explored under different irradiation light wavelengths, initial concentrations and organic solvents. Density functional theory was used for chemical calculation to explore the internal mechanism of solvent effect. All degradation kinetics conformed to the first-order kinetic model. Under different irradiation light wavelengths, the degradation rates were in the following order: 180~400 nm (0.1702~0.3008 min−1) > 334~365 nm (0.0265~0.0433 min−1) > 400~700 nm (0.0058~0.0099 min−1). When the initial concentration varied from 0.25 mg/L to 1 mg/L, the degradation rate decreased from 0.0379~0.0784 min−1 to 0.0265~0.0433 min−1 under 334~365 nm irradiation, which might be attributed to the reduction in light energy received per unit area and competition from intermediate metabolites. In different organic solvents, the degradation rates were in the order of acetone (0.1702~0.3008 min−1) > toluene (0.0408~0.0534 min−1) > n-hexane (0.0124~0.0299 min−1). Quantum chemical calculation and analysis showed that the energy change in electron transfer between solvent and NBFRs was the key factor to solvent effect in the degradation of NBFRs. The active sites and degradation pathways of NBFRs were also speculated, the nucleophilic reaction of the Br atom on a benzene ring was the main process of photodegradation and it was preferential to remove the bromine and then the ethyl group on the benzene ring. Our research will be helpful in predicting and evaluating their photochemical behavior in different environment conditions.

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“…Determining organohalogen compounds (OHCs) like organochlorine pesticides (OCPs), dechlorane plus (DP), and novel brominated flame retardants (NBFRs) in tree bark has recently been described by Chinese researchers. Material examined from rapidly growing city of Kaiyuan in Yunnan Province [83] and the Yellow River region [85] showed substantial contamination of these compounds in China and promising properties of the bark as a sensitive marker of this ubiquitous organic compound in the environment.…”

Section: Evaluation Of Air Organic Pollutants Using Tree Barkmentioning

confidence: 99%

“…Relatively recently, tree bark has been used as a passive air indicator for organic compounds, including dioxins (e.g., polychlorinated dibenzofurans, PCDFs, or dibenzo-p-dioxins, PCDDs), polychlorinated biphenyls (PCBs), brominated flame retardants (BFRs), chlorinated pesticides, and ammonium nitrate [25,58,73,78,[82][83]. Research conducted by Gueguen et al (2011) [12] as well as Salamova and Hites (2012) [84] indicates that tree bark is a particularly sensitive indicator of organobromine compounds: PBDEs (polybrominated diphenyl ethers) and PCBs.…”

Section: Evaluation Of Air Organic Pollutants Using Tree Barkmentioning

confidence: 99%

Tree Bark, a valuable source of information on air quality

Chrabąszcz

Mróz

2017

Pol. J. Environ. Stud.

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Concentrations and distributions of polybrominated diphenyl ethers and novel brominated flame retardants in tree bark and human hair from Yunnan Province, China

Cited by 28 publications

References 31 publications

Different organophosphate flame retardant and metabolite concentrations in urine from male and female university students in Beijing and an assessment of exposure via indoor dust

Different organophosphate flame retardant and metabolite concentrations in urine from male and female university students in Beijing and an assessment of exposure via indoor dust

Photodegradation Kinetics and Solvent Effect of New Brominated Flame Retardants (NBFRS) in Liquid Medium

Tree Bark, a valuable source of information on air quality

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