Article
Engineering, Environmental
Huijun Su, Shaobo Shi, Ming Zhu, Jianhua Li, Guanyong Su
Summary: A method to quantify liquid crystal monomers (LCMs) in sediment samples was developed and LCMs were found in samples from rivers, Taihu Lake, and e-waste recycling sites, providing initial evidence for their occurrence in sediment samples.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Mengqi Yan, Hongkai Zhu, Yumeng Shi, Ke Xu, Shucong Chen, Qiang Zou, Hongwen Sun, Kurunthachalam Kannan
Summary: This study found the simultaneous presence of multiple flame retardants in indoor dust collected from Tianjin, China, with organophosphate flame retardants being the most dominant. The study also identified multiple sources of flame retardants in the indoor microenvironment and suggested the need for continued monitoring and efforts to reduce exposure through dust ingestion.
ENVIRONMENTAL POLLUTION
(2022)
Article
Public, Environmental & Occupational Health
Cheryl Fairfield Estill, Alexander Mayer, Jonathan Slone, I-Chen Chen, Michael Zhou, Mark J. La Guardia, Nayana Jayatilaka, Maria Ospina, Antonia Calafat
Summary: Through evaluating exposure to TPhP among 12 nail salon technicians in California, it was found that there were significant differences in concentrations of TPhP in air, hand wipe, and urine samples, with post-shift concentrations of TPhP being significantly higher than pre-shift concentrations.
INTERNATIONAL JOURNAL OF HYGIENE AND ENVIRONMENTAL HEALTH
(2021)
Article
Materials Science, Multidisciplinary
Ze Rong, Yuanzhe Li, Rachel ZhiQi Lim, Haojing Wang, ZhiLi Dong, Kexin Li, Xueli Wang
Summary: A fire-retardant polyurea coating for industrial applications is proposed in this paper, which improves flame properties through the combination of aromatic diamine and aliphatic diisocyanate, as well as the mixing of various flame-retardant additives.
NPJ MATERIALS DEGRADATION
(2022)
Article
Environmental Sciences
Zhongshi Hong, Yachen Li, Xian Deng, Mingliang Chen, Jianpeng Pan, Zhichuan Chen, Xu Zhang, Chunxiao Wang, Chengzhi Qiu
Summary: This study identified and analyzed OPFRs-related genes using the TCGA and CTD databases, and found that OPFRs may be closely related to colorectal cancer (CRC) and associated with a good prognosis. Further experiments demonstrated that one of the OPFRs, triphenyl phosphate, significantly increased the viability and proliferation of CRC cell lines. Additionally, the research found that melatonin had a significant impact on CRC cell proliferation and migration ability induced by TPP.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Environmental Sciences
Brigid Carr, Pere Masque, Carlos M. Alonso-Hernandez, David Huertas, Philippe Bersuder, Imma Tolosa
Summary: This study analyzed sediment from Cienfuegos Bay, Cuba to examine the occurrence of organic pollutants from 1990 to 2015. The results showed the presence of regulated contaminants such as PCBs, OCPs, and PBDEs, with a decline in PCB contamination since 2007. Emerging contaminants, including PAEs, OPEs, and aHFRs, showed sharp increases, possibly due to the growing global usage of flame retardants and plasticizer additives. Local sources, such as a plastic recycling plant and urban waste outfalls, may contribute to these trends. Further research is needed to understand the influx of these emerging contaminants.
Article
Polymer Science
Young Shin Kim, Euy Sik Jeon
Summary: The mechanical and flame-retardant properties of flexible polyurethane foams (FPUF) were analyzed in relation to different types of flame retardants. The study compared FPUF samples containing halogenated and halogen-free flame retardants. Various tests, such as cup foaming, square foaming, Fourier-transform infrared spectroscopy, horizontal flame test, limited oxygen index, and cone calorimeter test, were conducted to evaluate the properties of the foams. The results show that FPUF blended with expandable graphite exhibited improved tensile strength and reduced heat release compared to samples containing melamine or tris 2-chloropropyl phosphate (TCPP).
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Environmental Sciences
Elina Pasecnaja, Ingus Perkons, Vadims Bartkevics, Dzintars Zacs
Summary: The study measured flame retardants in household dust samples from Latvia and found that OPFRs showed the highest concentrations. Despite the phase-out of PBDEs, they were still significant in the studied samples, with BDE-209 being the predominant compound. Human exposure to the flame retardants in the dust samples was found to be much lower than the reference dose values.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Jillian Ashley-Martin, Susan MacPherson, Zhao Zhao, Eric Gaudreau, Gilles Provencher, Mandy Fisher, Michael M. Borghese, Maryse F. Bouchard, Linda Booij, Tye E. Arbuckle
Summary: In this study, urinary concentrations of 15 organophosphate ester (OPE) metabolites in 1865 pregnant women were measured using two analytical methods. The results indicate widespread exposure to OPEs and their metabolites, and identify subpopulations who may have higher exposure.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Materials Science, Characterization & Testing
Hua Xin, Yue Chen, Xinqi Li, Yangfan Li, Qi Peng, Hao Luo
Summary: A new inorganic flame retardant P/N-GO was prepared by chemically modifying graphene oxide (GO) with phosphorus trichloride (POCl3) and 4,4-diamino-diphenylmethane (DDM). The P/N-GO was covalently grafted into a phosphorus-containing aqueous polyurethane (PWPU) system to prepare a flame-retardant nanocomposite (P/N-GO/PWPU). The uniform distribution of P/N-GO in the polymer matrix improves the mechanical properties of PWPU and enhances its flame-retardant properties.
Article
Environmental Sciences
Wanyun Zhang, Guoping Song
Summary: As brominated flame retardants (BFRs) have been gradually banned and replaced by organophosphorus flame retardants (OPFRs), this study investigated the relationship between triphenyl phosphate (TPP) and glioma. The study utilized bioinformatics analysis and databases to identify TPP-related genes, gene expression data, and pathways. The analysis revealed the potential association of TPP with glioma and its impact on patients' prognosis.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Review
Chemistry, Analytical
Parvaneh Hajeb, Argelia Castano, Enrique Cequier, Adrian Covaci, Marta Esteban Lopez, Ana Gonzalez Antuna, Line Smastuen Haug, Luis Alberto Henriquez-Hernandez, Lisa Melymuk, Octavio Perez Luzardo, Cathrine Thomsen, Katrin Vorkamp
Summary: Human biomonitoring is an important method for assessing exposure to environmental pollutants, and this article reviews studies on the chemical analysis of flame retardants (FRs) in human samples. The article discusses the different analytical methods used for FR biomarkers and highlights the challenges in analyzing low concentrations of FRs and limited sample materials. The development of universal analytical methods is also mentioned.
ANALYTICA CHIMICA ACTA
(2022)
Article
Environmental Sciences
Matthew Ruis, Kate Hoffman, Heather M. Stapleton
Summary: This study examined temporal changes in the accumulation of persistent organic pollutants (POPs) in human placenta and their association with birth outcomes. The results showed a decrease in placental concentrations of polybrominated diphenyl ethers (PBDEs) over time, particularly BDE-47. Placental tissues associated with female infants had higher levels of BDE-100 compared to male infants, and placental BDE-47 concentrations were significantly associated with lower birthweight in male infants.
Article
Environmental Sciences
Weilong Xing, Liangchen Zhong, Wen Gu, Mengyuan Liang, Lei Wang, Zhen Wang, Lili Shi, Shuai Sun
Summary: Surface soil and river sediment samples were collected from the downstream of Chuhe River basin in East China to investigate the occurrence and accumulation characteristics of legacy and novel brominated flame retardants (NBFRs). The concentrations of BDE-209 and nine NBFRs ranged from n.d. to 41.4 ng/g dw and from 0.29 to 19.73 ng/g dw in the collected samples. BTBPE was the predominant NBFR in both soil and sediment samples. The calculated concentration ratios of the total of the nine NBFRs to BDE-209 in most of the analyzed samples exceeded 1, indicating a clear shift from legacy brominated flame retardants to NBFRs in the downstream of Chuhe River basin.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Michelle L. Berger, Susan D. Shaw, Charles Rolsky, Jennifer H. Harris, Ying Guo, Kurunthachalam Kannan
Summary: This study analyzed the concentrations, patterns, contamination trends, potential maternal transfer, and tissue partitioning of eight alternative brominated flame retardants in harbor seal pups from the Northwest Atlantic. The results showed that these compounds were detected in both liver and blubber tissues, with hexabromocyclododecane isomers and 2-ethylhexyl 2,3,4,5-tetrabromobenzoate predominating. Additionally, this study reported the concentrations of tetrabromobisphenol A in multiple tissues for the first time.