A novel cleanup technique termed as gas purge-microsyringe extraction (GP-MSE) was evaluated and applied for polycyclic aromatic hydrocarbon (PAH) determination in road dust samples. A total of 68 road dust samples covering almost the entire Shanghai area were analyzed for 16 priority PAHs using gas chromatography-mass spectrometry. The results indicate that the total PAH concentrations over the investigated sites ranged from 1.04μg/g to 134.02μg/g dw with an average of 13.84μg/g. High-molecular-weight compounds (4-6 rings PAHs) were significantly dominant in the total mass of PAHs, and accounted for 77.85% to 93.62%. Diagnostic ratio analysis showed that the road dust PAHs were mainly from the mixture of petroleum and biomass/coal combustions. Principal component analysis in conjunction with multiple linear regression indicated that the two major origins of road dust PAHs were vehicular emissions and biomass/fossil fuel combustions, which contributed 66.7% and 18.8% to the total road dust PAH burden, respectively. The concentration of benzo[a]pyrene equivalent (BaPeq) varied from 0.16μg/g to 24.47μg/g. The six highly carcinogenic PAH species (benz(a)anthracene, benzo(a)pyrene, benzo(b)fluoranthene, benzo(k)fluoranthene, dibenz(a,h)anthracene, and indeno(1,2,3-cd)pyrene) accounted for 98.57% of the total BaPeq concentration. Thus, the toxicity of PAHs in road dust was highly associated with high-molecular-weight compounds.

译文

评估了一种称为气体吹扫-微注射器萃取 (gp-mse) 的新型净化技术,并将其用于道路粉尘样品中的多环芳烃 (PAH) 测定。使用气相色谱-质谱法分析了几乎整个上海地区的68个道路粉尘样品中的16个优先PAHs。结果表明,所研究部位的总PAH浓度范围为1.04 μ g/g至134.02 μ g/g dw,平均为13.84 μ g/g。高分子量化合物 (4-6环PAHs) 在PAHs的总质量中占主导地位,占77.85% 至93.62%。诊断比分析表明,道路粉尘PAHs主要来自石油和生物质/煤燃烧的混合物。结合多元线性回归的主成分分析表明,道路粉尘多环芳烃的两个主要来源是车辆排放和生物质/化石燃料燃烧,这分别为道路粉尘多环芳烃总负荷贡献了66.7% 和18.8%。苯并 [a] 芘当量 (BaPeq) 的浓度从0.16 μ g/g变化到24.47 μ g/g。六种高度致癌的PAH物种 (苯并 (a) 蒽,苯并 (a) 芘,苯并 (b) 荧蒽,苯并 (k) 荧蒽,二苯并 (a,h) 蒽和茚并 (1,2,3-cd) 芘占总BaPeq浓度的98.57%。因此,道路粉尘中PAHs的毒性与高分子量化合物高度相关。

+1
+2
100研值 100研值 ¥99课程
检索文献一次
下载文献一次

去下载>

成功解锁2个技能,为你点赞

《SCI写作十大必备语法》
解决你的SCI语法难题!

技能熟练度+1

视频课《玩转文献检索》
让你成为检索达人!

恭喜完成新手挑战

手机微信扫一扫,添加好友领取

免费领《Endnote文献管理工具+教程》

微信扫码, 免费领取

手机登录

获取验证码
登录