Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of the People's Republic of China, Nanjing, 210042, China.
School of Civil Engineering, Southeast University, Nanjing, 211189, China.
Environ Sci Pollut Res Int. 2023 Sep;30(43):97416-97425. doi: 10.1007/s11356-023-29300-3. Epub 2023 Aug 18.
Surface soil and river sediment samples were collected from the downstream of Chuhe River basin, East China, to investigate the occurrence and accumulation characteristics of legacy and novel brominated flame retardants (NBFRs). The respective concentrations of BDE-209 and nine NBFRs ranged from n.d. to 41.4 ng/g dry weight (dw) and from 0.35 to 362.78 ng/g dw in the collected surface soil samples and ranged from 0.29 to 19.73 ng/g dw and from 0.70 to 66.83 ng/g dw in the collected river sediment samples. Soil samples exhibited a higher potential to accumulate BTBPE while the relative abundance of PBT in the collected sediment samples was significantly higher than that in soils. Even so, BTBPE was the predominant NBFR in both soil and sediment samples. The concentrations and relative abundances of legacy and NBFRs exhibited large spatial variation. The calculated concentration ratios of the total of the nine NBFRs (∑NBFRs) to BDE-209 (∑NBFRs/BDE-209) in most of the analyzed samples far exceeded 1, implying a clear shift from legacy brominated flame retardants to NBFRs in the downstream of Chuhe River basin.
采集了中国东部滁河流域下游的表层土壤和河底沉积物样品，研究了传统和新型溴化阻燃剂（NBFRs）的存在和积累特征。采集的表层土壤样品中 BDE-209 和 9 种 NBFRs 的浓度范围分别为未检出到 41.4ng/g 干重（dw）和 0.35 到 362.78ng/g dw，采集的河底沉积物样品中 BDE-209 和 9 种 NBFRs 的浓度范围分别为 0.29 到 19.73ng/g dw 和 0.70 到 66.83ng/g dw。土壤样品表现出更高的 BTBPE 积累潜力，而采集的沉积物样品中 PBT 的相对丰度明显高于土壤。即便如此，BTBPE 仍然是表层土壤和河底沉积物中主要的 NBFR。传统和 NBFR 的浓度和相对丰度具有较大的空间变化。在所分析的大多数样品中，9 种 NBFRs 总量（∑NBFRs）与 BDE-209 的浓度比值（∑NBFRs/BDE-209）远远超过 1，这表明滁河流域下游从传统溴化阻燃剂向 NBFRs 的明显转变。
