Time: 15:30-16:30, 21st December 2017
Venue: Lecture Hall (221), Building No.16,Weijin Campus, Tianjin University
Speaker: Dr. ZHU Xiangyu, Institute of Surface-Earth System Science, Tianjin University
Topic: Synchrotron Radiation Technology Introduction and its Application: Taking Mineral - Microbial Reactions as an example
Abstract: The emergence of synchrotron radiation sources is regarded as another revolutionary event in science and technology after the X-ray light source and laser light source. After the development of the first, the second, and the third generation , the fourth generation of synchrotron radiation source represented by X-ray free electron laser (XFEL) has been put into use in the US and Europe, recently. Synchrotron radiation sources, characterized by high brightness, wide energy spectrum, and narrow pulses, have greatly promoted the development of spectroscopy and imaging technology. Mineral-microbial reactions have been active in the surface layer of the Earth since the beginning of primordial life, advancing the evolution of minerals and microbes, while simultaneously amending the Earth's environment, and being closely linked to the geochemical cycles of various elements and local environmental pollution. Most of the mineral-microbial reaction products are amorphous which can be resolved by synchrotron based XAFS at the molecular scale. In-situ microscopic studies of mineral-microbial reactions require coupled micro-area imaging and chemical state analysis and synchrotron radiation based STXM and μ-XRF technology offers this possibility. This report will take the mineral-microbial reaction study as an example to discuss the possible applications of synchrotron radiation technology in earth science and environmental science.
