morphology

morphology The morphology of elementThe Morphology analysis of elements in atmospheric dust has also received widespread attention. Huffman and others carried out X-ray absorption fine structure (XAFS) analysis of the particulate matter generated from petroleum processing and fuel combustion using fluorescence mode, Lytle detector, and multiple Ge array detector. The analysis found that <a href="https://www.matexcel.com/category/products/metal/co-based-metal-powder/">copper</a>, lead, and zinc were found in petroleum processing and fuel. The particles produced by the combustion mainly exist in the form of sulfate, and arsenic mainly exists in the form of pentavalent arsenate, and the existence of the phase is still difficult to determine.Generally, when the element content in the sample is less than 0.1%, the Lytle detector is more used, and for the sample with extremely low element content, a multi-element Ge array detector is used. MingyuJiang and othersconducted an X-ray absorption near-side structure (XANES) analysis of the forms of lead, manganese, and chromium in urban and indoor dust. The standard materials used were urban dust (SRM1649a) and indoor dust (SRM2584) from the National Institute of Standards and Technology. Two standard substances, the standard substance and the powder sample to be tested were evenly coated on the double-sided tape for measurement, and the main forms of lead in urban dust and indoor dust were found to be 61% lead sulfate + 39% lead carbonate and 98.5 % Lead carbonate + 1.5% lead sulfate.Manganese mainly exists in the form of divalent manganese sulfate in urban dust, and in the form of a mixture of different divalent manganese in indoor dust; chromium is most likely to exist in the form of chromite (FeCr2O4) in urban dust. Indoor dust mainly exists as a mixture of chromium trioxide and a small amount of chromite. In addition to the analysis of elemental morphology in the dust, this study also combined with <a href="https://www.matexcel.com/services/nano-bio-service/nanomaterials-characterization/">nano-scale characterization analysis</a>, which helps to provide more information on the bioavailability of toxic elements and their migration and transformation laws. https://speakerdeck.com/morphology