Magnetism and Grain-Size Distribution of Particles Deposited on the Surface of Urban Trees in Lanzhou City, Northwestern China.

ABSTRACT: Studies on the variation in the particulate matter (PM) content, Saturation Isothermal Remanent Magnetization (SIRM), and particle grain-size distribution at a high spatial resolution are helpful in evaluating the important role of urban forests in PM removal. In this study, the trees located in dense urban forests (T0) retained more PM than trees located in open spaces (T1-T4); the SIRM and PM weight of T0 were 1.54-2.53 and 1.04-1.47 times more than those of T1-T4, respectively. In addition, the SIRM and PM weight decreased with increasing distance to the road, suggesting that distance from pollution sources plays a key role in reducing the air concentration of PM. The different grain-size components were determined from frequency curve plots using a laser particle-size analyzer. A unimo

SUBMITTER: Wang B 

PROVIDER: S-EPMC8622433 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature