Application of micro-morphology in the physical characterization of urban road dust

作     者：Jithin Jose B.Srimuruganandam Jithin Jose;B.Srimuruganandam

作者机构：School of Civil EngineeringVellore Institute of TechnologyVellore 632014Tamil NaduIndia 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2021年第19卷第1期

页      面：146-155页

核心收录：

学科分类：07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：The authors wish to thank the management of the Vellore Institute of Technology  Vellore  for providing SEM and EDAX facilities through the VIT-DST-FIST scheme 

主　　题：Road dust Scanning electron microscopy Shape factors Silt load Size distribution Particle shapes 

摘      要：Urban road dust was collected from Vellore City,Tamil Nadu,India,and *** electron microscopy(SEM)was used to examine road dust from nine sampling locations in the study *** image analysis was used to identify various shape factors of collected dust *** equivalent spherical diameter of most particles was between 10μm and 30μ*** particles had greater concentrations at locations with higher traffic *** were categorized into four classes based on their shape factors,viz.,spherical,mineral,elongated,or *** particles had the smallest mean equivalent diameter(1.95μm)and mineral particles had the largest diameter(33.3μm).Spherical particles made up the smallest portion of road dust(0-12%)in the study region and mineral particles made up the largest(45-65%).Elongated and irregular particles,each made up 23-30%of road *** dispersive X-ray spectroscopy analysis was used to identify the elemental composition of dust *** particles were mostly from combustion sources and mineral particles were largely of crustal *** individual source was found for irregular and elongated *** debris was the major source of irregular particles.