【摘要】 在合肥市不同区域采集了31个土壤样品,利用气相色谱-质谱仪测定土壤中卤代阻燃剂的含量,并对其组成特征、空间分布、来源进行解析.研究结果显示,合肥市表层土壤中总的多溴联苯醚(polybrominated diphenyl ethers,∑₂₃PBDEs)、替代型溴代阻燃剂(alternative brominated flame retardants,∑₂₂ABFRs)和得克隆及其类似物(dechloranes,∑₁₁DECs)浓度均值分别为（6.490±13.221）、（26.375±101.928）和（0.815±0.760） ng/g.十溴二苯乙烷（DBDPE）是替代型溴代阻燃剂中最主要的同系物,占比高达84.4%.空间分布上,卤代阻燃剂浓度的高值多位于城市开发区、高新区等制造业集中地.源解析表明,其主要来源为商业多溴联苯醚,其次来源于阻燃剂的生产、运输及其环境降解过程.基于危险指数法估算的非致癌风险评价结果表明,研究区内目标物的非致癌风险指数均小于1,在可接受范围内,无非致癌风险.更多还原

【Abstract】 The contents of halogenated flame retardants（HFRs） in 31 surface soil samples collected from different areas of Hefei City were measured by gas chromatography-mass spectrometry. Their composition characteristics, spatial distribution, and sources were explored. The results showed that the mean concentrations of ∑₂₃PBDEs, ∑₂₂ABFRs, and ∑₁₁DECs in the surface soils of Hefei City were（6.490 ±13.221）,（26.375 ± 101.928）, and（0.815 ± 0.760） ng/g, respectively. DBDPE is the main homologue among alternative flame retardants, accounting for 84.4%. In terms of spatial distribution, the hotspots of HFRs were mostly located in manufacturing concentrated areas, such as urban development zones and high-tech zones. Source analysis revealed that the use of commercial polybrominated diphenyl ethers and alternative flame retardants in the study area were the main emission sources, followed by the production,transportation, and environmental degradation process of HFRs. Non-carcinogenic risk assessment was carried out based on hazard index method. The results showed that the non-carcinogenic risk index of the target objects in the study area were less than 1, which were within the acceptable range, indicating that there was no non-carcinogenic risk.更多还原