Leaching of brominated flame retardants (BFRs) from BFRs-incorporated plastics in digestive fluids and the influence of bird diets

• Published in: Journal of hazardous materials 2020-07, Vol.393, p.122397-122397, Article 122397
• Main Authors: Guo, Huiying, Zheng, Xiaobo, Luo, Xiaojun, Mai, Bixian
• Format: Article
• Language: English
• Subjects: Acrylic Resins - chemistry; Animals; Bird; Birds; Bivalvia; Body Fluids - chemistry; Brominated flame retardants; Butadienes - chemistry; Diet; Diet - veterinary; Fishes; Flame Retardants; Gastrointestinal Tract - chemistry; Halogenated Diphenyl Ethers - chemistry; Oryza - chemistry; Plastics; Polystyrenes - chemistry
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2020.122397

[Display omitted] •Leaching of BFRs was assessed in various sizes of ABS plastics.•Leaching of BFRs was best fitted by second-order diffusion model.•Food adsorbed BFRs from fluids, and lowered the leached proportions of BFRs from ABS.•More lipophilic BFRs were prone to migrate from ABS to fluids and diet residues. Leaching kinetics of additive-derived brominated flame retardants (BFRs) in different sizes (100 μm–2 mm) of acrylonitrile-butadiene-styrene copolymer (ABS) plastics were investigated in water, simulated gastric fluids, and simulated gastrointestinal fluids. The influences of bird diets (fish, clam, and rice) on the leaching of BFRs from plastics were also explored. The leaching kinetics of BFRs were best fitted with the second-order diffusion model. The leaching rates of BFRs increased for the less lipophilic BFRs in finer sizes of ABS. The log-transformed leached proportions of BFRs at equilibrium were significantly correlated with logKOW of BFRs (p < 0.05). BFRs migrated from ABS to digestive fluids and diet residues at equilibrium, since elevated concentrations of BFRs were observed in diet residues than virgin diet samples. Leached proportions of BFRs in gut fluids from mixture of ABS and diets were lower than those from only ABS. The logKOW of BFRs and the migration proportions of BFRs from ABS to digestive fluids and diet residues were fitted with linear regression analysis. The results indicate that more lipophilic BFRs are preferentially leached from BFRs-incorporated plastics into fluids and are further adsorbed by diet residues.