Institute of Environmental Science and Meteorology, University of the Philippines Diliman, 1101, Quezon City, Philippines.
University of Santo Tomas, España Blvd, Sampaloc, Manila, 1008, Metro Manila, Philippines.
Environ Geochem Health. 2019 Feb;41(1):427-446. doi: 10.1007/s10653-018-0208-7. Epub 2018 Nov 20.
This study measured both PM and surface dust concentrations at roadside in the Central Business District of Baguio City. A total of 66 PM filters and 25 surface dust samples were analyzed for 14 metals (Na, Mg, Al, Ca, Cr, Mn, Co, Ni, Cu, Zn, As, Sr, Cd and Pb) using inductively coupled plasma mass spectrometer ICP-MS to characterize sources of airborne particulate matter (APM). Calculation of enrichment factors indicated elements Zn, Cd, Pb and As to be enriched in both PM and surface dust samples. The compositional signature of local surface dust was found to be strongly correlated with that of PM particles. Enrichment Factor, Conditional Probability Function (CPF), Correlation Analysis and Principal component analysis were applied to determine sources affecting the Baguio CBD area, and results indicate three APM contributing sources (1) soil sources and (2) soil-road dust resuspension and vehicular emissions (3) vehicular emissions. The NE and SW wind sectors were dominant for most of the identified sources.
本研究在碧瑶市中央商务区的路边测量了 PM 和地表灰尘浓度。使用电感耦合等离子体质谱仪 ICP-MS 分析了总共 66 个 PM 过滤器和 25 个地表灰尘样本中的 14 种金属（Na、Mg、Al、Ca、Cr、Mn、Co、Ni、Cu、Zn、As、Sr、Cd 和 Pb），以表征空气悬浮颗粒物（APM）的来源。富集因子的计算表明，Zn、Cd、Pb 和 As 元素在 PM 和地表灰尘样本中均有富集。发现当地地表灰尘的组成特征与 PM 颗粒强烈相关。应用富集因子、条件概率函数（CPF）、相关分析和主成分分析来确定影响碧瑶 CBD 地区的来源，结果表明有三个 APM 贡献源（1）土壤源和（2）土壤-道路灰尘再悬浮和车辆排放（3）车辆排放。在大多数已确定的来源中，NE 和 SW 风向占主导地位。
