Gupta Sarika, Gadi Ranu, Mandal T K, Sharma S K
Guru Gobind Singh Indraprastha University, Delhi, 110078, India.
Indira Gandhi Delhi Technical University for Women, Delhi, 110006, India.
Environ Monit Assess. 2017 Jan;189(1):43. doi: 10.1007/s10661-016-5756-7. Epub 2016 Dec 30.
Delhi is one of the most polluted cities in the world. The generation of aerosols in the lower atmosphere of the city is mainly due to a large amount of natural dust advection and sizable anthropogenic activities. The compositions of organic compounds in aerosols are highly variable in this region and need to be investigated thoroughly. Twenty-four-hour sampling to assess concentrations of n-alkanes (ng/m) in PM was carried out during January 2015 to June 2015 at Indira Gandhi Delhi Technical University for Women (IGDTUW) Campus, Delhi, India. The total average concentration of n-alkanes, 243.7 ± 5.5 ng/m, along with the diagnostic tools has been calculated. The values of CPI, CPI, and CPI for the whole range of n-alkanes series, petrogenic n-alkanes, and biogenic n-alkanes were 1.00, 1.02, and 1.04, respectively, and C were at C and C. Diagnostic indices and curves indicated that the dominant inputs of n-alkanes are from petrogenic emissions, with lower contribution from biogenic emissions. Significant seasonal variations were observed in average concentrations of n-alkanes, which is comparatively higher in winter (187.4 ± 4.3 ng/m) than during the summer season (56.3 ± 1.1 ng/m).
德里是世界上污染最严重的城市之一。该城市低层大气中气溶胶的产生主要归因于大量的自然沙尘平流和可观的人为活动。该地区气溶胶中有机化合物的成分变化很大，需要进行深入研究。2015年1月至2015年6月期间，在印度德里英迪拉·甘地妇女技术大学（IGDTUW）校园进行了24小时采样，以评估PM中n - 烷烃的浓度（ng/m）。已计算出n - 烷烃的总平均浓度为243.7 ± 5.5 ng/m，以及相关诊断工具。整个n - 烷烃系列、成岩n - 烷烃和生物源n - 烷烃的CPI、CPI和CPI值分别为1.00、1.02和1.04，且C分别在C和C处。诊断指数和曲线表明，n - 烷烃的主要来源是成岩排放，生物源排放的贡献较低。观察到n - 烷烃平均浓度存在显著的季节变化，冬季（187.4 ± 4.3 ng/m）相对高于夏季（56.3 ± 1.1 ng/m）。
