Magnetic susceptibility of road deposited sediments at a national scale - Relation to population size and urban pollution

被引：58

作者：

Jordanova, Diana ^{[1
]}

Jordanova, Neli ^{[1
]}

Petrov, Petar ^{[1
]}

机构：

[1] Bulgarian Acad Sci, Natl Inst Geophys Geodesy & Geog, BU-1113 Sofia, Bulgaria

来源：

ENVIRONMENTAL POLLUTION | 2014年 / 189卷

关键词：

Road dusts; Magnetic susceptibility; Heavy metals; NO2; Population size; PARTICULATE MATTER CONCENTRATIONS; HEAVY-METALS; STREET DUST; TRAFFIC EMISSIONS; GRAIN-SIZE; PARTICLES; ENVIRONMENT; PARAMETERS; AIRBORNE; CHINA;

D O I：

10.1016/j.envpol.2014.02.030

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Magnetic properties of road dusts from 26 urban sites in Bulgaria are studied. Temporal variations of magnetic susceptibility (chi) during eighteen months monitoring account for approximately 1/3rd of the mean annual values. Analysis of heavy metal contents and magnetic parameters for the fraction d < 63 mu m reveal significant correlations (p < 0.05) between chi and Fe, Mn and PLI index. The highest negative correlation (R-2 = -0.84) is observed between the ratio ARM/chi and Pb content. It suggests that Pb is related to brake/tyre wear emissions, releasing larger particles and higher Pb during slow driving - braking. Bulk chi values of road dusts per city show significant correlation with population size and mean annual NO2 concentration on a log-normal scale. The results demonstrate the applicability of magnetic measurements of road dusts for estimation of mean NO2 levels at high spatial density, which is important for pollution modelling and health risk assessment. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：239 / 251

页数：13