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用X射线光电子能谱 (XPS)表面分析技术和配有X射线能谱分析仪的扫描电镜 (SEM/EDAX)对提取于希夏邦玛峰冰芯的不溶粉尘微粒样品进行测定分析 ,结果显示 ,微粒物表面的SO2 -4 及SO2 -3 含量明显高于内部 (有机硫化物除外 ) ,这种差异源于大气粉尘在沉积到雪冰中以前对SOx 的捕捉 ,因而与微粒本身的含硫物质成分属于不同的来源 .微粒物中富含具有催化能力的过渡金属 (如Fe ,Ti等 ) ,它们的氧化物在冰芯记录形成之前可能对大气中的SOx 氧化成为硫酸盐沉积物的过程产生光催化作用 .分析表明粉尘对SOx 的吸附运载和催化作用 ,是造成冰芯中SO2 -4 与粉尘微粒记录相关的重要原因之一 .
The insoluble dust particles extracted from the Xixia Bangma ice core were analyzed by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM / EDAX) with an X-ray energy dispersive spectrometer. The results showed that , The contents of SO2-4 and SO2-3 on the surface of the particulate matter are obviously higher than those of the inner part (except for organic sulfides). The difference comes from the capture of SOx by atmospheric dust before it is deposited in snow ice, Substance components belong to different sources. Particulate matter is rich in catalytic transition metals (such as Fe, Ti, etc.) that oxidize SOx in the atmosphere to sulfate sediments prior to ice core recording Resulting in the photocatalytic activity.The analysis shows that the adsorption and transport of SOx by dust and catalysis are one of the important reasons that cause the SO2-4 in the ice core to be related to the recording of dust particles.