International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Chemosphere. 2010 Apr;79(4):441-7. doi: 10.1016/j.chemosphere.2010.01.048. Epub 2010 Feb 18.
Understanding the seasonal variations of sources of polycyclic aromatic hydrocarbons (PAHs) in air in urban region is important to the effective control of air pollution in the region. Based on a year round dataset (from August 2008 to July 2009), the sources of atmospheric PAHs in Harbin, a typical Chinese northeastern urban city, were analyzed by principal component analysis (PCA) and positive matrix factorization (PMF). The average total (gas plus particulate) PAH concentration varied from 6.3 ng m(-3) to 340 ng m(-3) with a mean of 100+/-94 ng m(-3), with higher concentrations in heating season than those in non-heating season. PCA and PMF identified similar source factors to atmospheric PAHs with obvious seasonal variation. The results obtained by PMF method indicated that the main sources were coal-fired boiler (39%), diesel engine (34%) and coal average (22%) in heating season and traffic emissions (59%), ground evaporation (18%) and coal average (17%) in non-heating season. Excellent correlation coefficients between predicted and measured concentrations of PAHs indicated that PMF was a useful model for source apportionment of PAHs in atmosphere.
了解城市地区空气中多环芳烃（PAHs）来源的季节性变化对于该地区有效控制空气污染非常重要。基于全年数据集（2008 年 8 月至 2009 年 7 月），采用主成分分析（PCA）和正定矩阵因子分析（PMF）对中国东北典型城市哈尔滨大气中 PAHs 的来源进行了分析。大气总（气相+颗粒相）PAH 浓度的平均值从 6.3ng/m³到 340ng/m³不等，平均值为 100+/-94ng/m³，采暖季浓度高于非采暖季。PCA 和 PMF 确定了与大气 PAHs 具有明显季节性变化的类似来源因素。PMF 方法的结果表明，采暖季的主要来源是燃煤锅炉（39%）、柴油机（34%）和煤平均值（22%），非采暖季的主要来源是交通排放（59%）、地面蒸发（18%）和煤平均值（17%）。PAHs 预测浓度与实测浓度之间具有良好的相关性系数，表明 PMF 是大气中 PAHs 源解析的有用模型。
