Department of Physics, Visva Bharati University, Santiniketan, India.
Environ Monit Assess. 2011 May;176(1-4):473-81. doi: 10.1007/s10661-010-1598-x. Epub 2010 Jul 16.
Powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and tunneling electron microscopy (TEM) studies of two solid vehicle wastes (pollutants) from petrol- and diesel-fueled engines of Kolkata (India) have detected a significant amount of ultrafine particles in the nanometer scale in these wastes. Both powder XRD and selected area electron diffraction from TEM have confirmed the existence of inhomogeneous distribution of nanocrystallites in these pollutants. Energy dispersive X-ray spectrometry shows that these wastes contain mainly carbon and oxygen as the constituent components. These pollutants are magnetic in nature as seen with SQUID magnetometry, and the presence of a high amount of carbon presumably is likely the origin of the magnetic property.
对来自印度加尔各答的汽油和柴油发动机的两种固体载体废物（污染物）进行粉末 X 射线衍射（XRD）、扫描电子显微镜（SEM）和隧道电子显微镜（TEM）研究，发现这些废物中存在大量纳米级的超细颗粒。粉末 XRD 和 TEM 的选区电子衍射都证实了这些污染物中纳米晶的不均匀分布。能谱分析显示这些废物主要含有碳和氧作为组成成分。这些污染物具有磁性，这可以通过 SQUID 磁强计观察到，而大量碳的存在可能是其磁性的来源。
