Samples of PM2.5 were collected from 5 sites in Quanzhou in March, April and July, 2014. The concentrations of lanthanoid and other trace metals in the PM2.5 were determined by Inductively Coupled Plasma Mass Spectrometry(ICP-MS). The total lanthanoid concentration (ΣLoid), the ratio of light-lanthanoid(L Loid, including, La, Ce, Pr, Nd, Sm and Eu) to heavy-lanthanoid(H Loid, including Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu) in PM2.5 were 2.490-5.708 ng·m-3(65.682-126.529 μg·g-1) and 12.086-14.319, respectively. The distribution pattern of Loid in PM2.5 was also evaluated in this study. All PM2.5 samples showed similar distribution pattern with local topsoil. And positive Ce and negative Eu anomalies were observed in PM2.5. La-Ce-V plots and chemical mass balance(CMB) model were used for source identification and apportionment of PM2.5in Quanzhou. The CMB model was used to identify four main sources:urban fugitive dust, coal combustion, vehicle exhaust and waste incineration emission which had a contribution of 18.9%, 10.9%, 30.6% and 30.2%, respectively.
Keywords: PM2.5; Quanzhou; chemical mass balance(CMB); lanthanoid; source apportionment.