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Synchrotron micro-scale measurement of metal distributions in Phragmites australis and Typha latifolia root tissue from an urban brownfield site

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Journal of Environmental Sciences 2016年第3期28卷 172-182页

作者： Huan Feng Yu Qian Frank J.Gallagher Weiguo Zhang Lizhong Yu Changjun Liu Keith W.Jones ryan tappero Department of Earth and Environmental Studies Montclair State University Urban Forestry Program Department of EcologyEvolution and Natural ResourcesRutgersThe State University of New Jersey State Key Laboratory of Estuarine and Coastal Research East China Normal University Biological Environmental and Climate Sciences DepartmentBrookhaven National Laboratory Photon Sciences Directorate Brookhaven National Laboratory

Liberty State Park in New Jersey,USA,is a ＂brownfield＂ site containing various levels of *** investigate metal uptake and distributions in plants on the brownfield site,Phragmites australis and Typha latifolia were collected in Liberty State Park during the growing season（May–September）in 2011 at two sites with the high and low metal loads,*** objective of this study was to understand the metal（Fe,Mn,Cu,Pb and Zn）concentration and spatial distributions in *** and *** root systems with micro-meter scale resolution using synchrotron X-ray microfluorescence（μXRF）and synchrotron X-ray computed microtomography（μCMT）*** root structure measurement by synchrotron μCMT showed that high X-ray attenuation substance appeared in the *** μXRF measurement showed that metal concentrations and distributions in the root cross-section between epidermis and vascular tissue were statistically *** correlations were found between metals（Cu,Mn,Pb and Zn）and Fe in the epidermis,implying that metals were scavenged by Fe *** results from this study suggest that the expression of metal transport and accumulation within the root systems may be element *** information derived from this study can improve our current knowledge of the wetland plant ecological function in brownfield remediation.

关键词： Phragmites australis Typha latifolia Trace metals Synchrotron radiation technique Brownfield

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