Synchrotron X-ray microfluorescence measurement of metal distributions in Phragmites australis root system in the Yangtze River intertidal zone
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- 作者：Huan Feng ; Weiguo Zhang ; Yu Qian ; Wenliang Liu ; Lizhong Yu ; Shinjae Yoo ; Jun Wang ; Jia-Jun Wang ; Christopher Eng ; Chang-Jun Liu and Ryan Tappero
- 关键词：Yangtze River intertidal zone ; metal uptake ; Phragmites australis ; Fe nanoparticles
- 刊名：Journal of Synchrotron Radiation
- 出版年：2016
- 出版时间：July 2016
- 年：2016
- 卷：23
- 期：4
- 页码：937-946
- 全文大小：2226K
- ISSN：1600-5775
文摘
This study investigates the distributions of Br, Ca, Cl, Cr, Cu, K, Fe, Mn, Pb, Ti, V and Zn in Phragmites australis root system and the function of Fe nanoparticles in scavenging metals in the root epidermis using synchrotron X-ray microfluorescence, synchrotron transmission X-ray microscope measurement and synchrotron X-ray absorption near-edge structure techniques. The purpose of this study is to understand the mobility of metals in wetland plant root systems after their uptake from rhizosphere soils. Phragmites australis samples were collected in the Yangtze River intertidal zone in July 2013. The results indicate that Fe nanoparticles are present in the root epidermis and that other metals correlate significantly with Fe, suggesting that Fe nanoparticles play an important role in metal scavenging in the epidermis.