Level and Contamination Assessment of Environmentally Sensitive Elements in Smaller than 100 μm Street Dust Particles from Xining, China

International Journal of Environmental Research and Public Health

Ni Zhao²  Xinwei Lu¹ 

[1] School of Tourism and Environment, Shaanxi Normal University, Xi’an 710062, China;

关键词: street dust;    environmentally sensitive elements;    enrichment factor;    contamination assessment;   

DOI  :  10.3390/ijerph110302536

来源: mdpi

【 摘 要 】

Concentrations of the environmentally sensitive elements (ESEs) As, Co, Cu, Mn, Ni, Pb, V and Zn in smaller than 100 μm street dust particles from Xining were measured using X-ray fluorescence spectrometry and their contamination levels were assessed based on enrichment factor (EF), geoaccumulation index (I_geo) and pollution load index (PLI). The concentrations of As, Co, Cu, Mn, Ni, Pb, V and Zn in smaller than 100 μm street dust particles from Xining are 0.1–0.8, 2.7–10.9, 0.7–5.2, 0.3–1.1, 0.6–2.5, 1.2–11.1, 0.7–1.3 and 0.4–2.9 times the background values of Qinghai soil, respectively. The calculated EF and I_geo values reveal the order Co > Pb > Cu > Zn > V > Ni > Mn > As. The EF and I_geo values of Co, Cu, Pb and Zn are higher indicating that there is considerable pollution by these elements in smaller than 100 μm street dust particles, especially for Co. The EF and I_geo of Mn, Ni and V are lower and the assessment results indicate an absence of distinct Mn, Ni and V pollution in the studied samples. The mean value of PLI_site is 1.14, indicating a slightly pollution in the whole city of Xining. The order of PLI_area for the five tested districts is Center District (CD) > East District (ED) > West District (WD) > North District (ND) > South District (SD), showing that ESEs pollution in the South District is the lightest while it is the highest in the Central District.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.