Chemical Compositions of PM2.5 Emitted from Diesel Trucks and Construction Equipment

• DOI: 10.1007/s41810-017-0020-2
• Publication Date: 2018-03-06T16:15:44Z
• Authors: Yayong Liu; Wenjie Zhang; Wen Yang; Zhipeng Bai; Xueyan Zhao
• Keywords: Dilution; Heavy duty

This study reported the chemical compositions of PM2.5 for seven kinds China IV diesel trucks and three stage II construction equipment. Filter samples were directly collected at tailpipe with a dilution system. Twenty elements (Al, Si, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Cd, Sn, Sb, Ba Pb), water-soluble ions (WSIs) including NH4+, K+, Ca2+, Cl−, NO3− SO42−, carbonaceous species analyzed characterized. The uncertainties these also estimated. Overall, highest proportion was contributed by matter (OC EC), accounting 46.4 38.5% equipment, respectively. EC/OC ratios higher than 1, lowest in light-duty (LDDTs) as 1.4 ± 0.2 excavators 5.1 0.3. Similarities differences compared among source profiles using residual (R)/uncertainty (U) ratios. Also Pearson's correlation coefficients to determine relationships between various components. In addition, equipment our those other studies recent years from China. Variations observed results due uncontrolled factors such operating conditions, fuel quality sampling measurements. To assess uncertainties, better knowledge local more elaborate measurements are needed future research.