Characteristics and environmental significance of rare earth elements in PM2.5 of Nanchang, China

(La/Sm)N and (Gd/Yb)N reflected the fractionation degree of LREE and HREE, and the plot of (La/Sm)N vs (Gd/Yb)N was used to present REE fractionations of PM2.5 and potential-source samples. WS, FRI and CES were away from the local pollution sources, JDTG was impacted by coal dust, and PFAO and PC were close to the local sources, showing the obvious effect of all sources