Multifractal analysis to characterize urban surface dust volume-size distribution

作     者：Zhiming Zhang Baoshan Cui Fengman Fang Xiaoyun Fan Honggang Zhang 

作者机构：School of Environment Beijing Normal University State Key Joint Laboratory of Environmental Simulation and Pollution Control No. 19 Xinjiekouwai Street Beijing 100875 China College of Territorial Resources and Tourism Anhui Normal University No. 2 Huajin South Road Wuhu 241003 China 

出 版 物：《Procedia Environmental Sciences》 

年 卷 期：2012年第13卷

页      面：2394-2401页

主　　题：Multifractal analysis Urban surface dust particle-size distribution Rényi dimensions 

摘      要：The amount of ubiquitous urban environment surface dust with high contaminants is directly correlated with the degree of harm to the human body. This paper discusses the surface dust grain-size distribution characteristics by utilizing the multifractal model. The results indicate that urban surface dust particle distribution is a scattered distribution. Rényi-dimension spectra curves of dust are either nearly sigma shaped (q ≥ 0), or they follow a quasi-linear variation (q 0). The Rényi dimensions (D(q)) and pH were found to have significance correlation. No relationship was found between D(q) and Arsenic (As). When q 0, organic matter (OM) and Mercury (Hg) are positively correlated with Rényi dimensions. However, OM and Hg are not correlated with D(q) when q ≥ 0. The use of this multifractal model could be considered a way to express the contaminant level in dust. It may be taken into consideration in environment management strategies.