昆明市大气总悬浮颗粒物和PM 2.5 上多溴联苯醚的分布特征和潜在风险

Q2 Environmental Science 环境科学研究 Pub Date : 2018-05-25 DOI:10.13198/j.issn.1001-6929.2018.03.01

高淑梅, 黎潇, 李晓曼, 毕婷婷, 潘学军, 韩丰霞

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Abstract

为探究PBDEs（多溴联苯醚）在昆明大气中的环境行为，于2014年3月对昆明8个采样点大气TSP（总悬浮颗粒物）和PM2.5样本进行了收集并利用GC-MS技术对其上附着的PBDEs的13种同系物进行了测定，进而对TSP和PM2.5上PBDEs的分布特征和潜在风险进行了分析.结果表明：附着在TSP上的∑PBDE浓度（多溴联苯醚的总质量浓度）的范围为21.10~175.00 pg/m3.而附着在PM2.5上的∑PBDE浓度范围为17.50~149.00 pg/m3，约占TSP中∑PBDE浓度的35.31%~85.14%，并且高溴化的同系物（BDE-138~BDE-209）比低溴化的同系物（BDE-17~BDE-99）更容易附着在PM2.5上，约占∑PBDE浓度的8.50%~61.60%.对大气颗粒物中PBDEs的潜在影响和空气吸入暴露剂量评估结果表明，成人和儿童对PBDEs的DEDair（呼吸日暴露量）分别在5.28~43.75和6.90~57.23 pg/（kg·d）之间，TDI（每日总摄入量）分别在114.78~951.09和150.00~1 244.13 pg/（kg·d）之间，远低于最低无害水平[1 mg/（kg·d）].BDE-99的TDI分别为11.09~72.39和14.35~94.57 pg/（kg·d），均低于最低摄入水平[260 pg/（kg·d）].研究显示，昆明市大气TSP和PM2.5上的PBDEs对人体不存在健康风险.

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Distribution characteristics and potential risks of polybrominated biphenyl ethers on total suspended particulate matter and PM 2.5 in the atmosphere of Kunming City

To investigate the environmental behavior of PBDEs (polybrominated diphenyl ethers) in the atmosphere of Kunming, in March 2014, atmospheric TSP (total suspended particulate matter) and PM2.5 samples were collected from 8 sampling points in Kunming, and 13 homologues of PBDEs attached to them were measured using GC-MS technology, Furthermore, the distribution characteristics and potential risks of PBDEs on TSP and PM2.5 were analyzed. The results showed that the concentration of ∑ PBDE attached to TSP (total mass concentration of polybrominated diphenyl ethers) ranged from 21.10 to 175.00 pg/m3, while the concentration of ∑ PBDE attached to PM2.5 ranged from 17.50 to 149.00 pg/m3, accounting for approximately 35.31% to 85.14% of the ∑ PBDE concentration in TSP, Moreover, high brominated homologues (BDE-138~BDE-209) are more likely to adhere to PM2.5 than low brominated homologues (BDE-17~BDE-99), accounting for approximately 8.50%~61.60% of the concentration of ∑ PBDE. The potential impact on PBDEs in atmospheric particulate matter and the evaluation of air inhalation exposure doses indicate that the DEDay (respiratory daily exposure) of PBDEs in adults and children ranges from 5.28 to 43.75 and 6.90 to 57.23 pg/(kg · d), respectively, The TDI (total daily intake) ranges from 114.78 to 951.09 and 150.00 to 1244.13 pg/(kg · d), respectively, far below the minimum harmless level [1 mg/(kg · d)] The TDI of BDE-99 is 11.09~72.39 and 14.35~94.57 pg/(kg · d), respectively, which are lower than the minimum intake level [260 pg/(kg · d)]. Studies have shown that PBDEs on atmospheric TSP and PM2.5 in Kunming do not pose a health risk to humans

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