The Experts below are selected from a list of 2325 Experts worldwide ranked by ideXlab platform
Ryan Tappero - One of the best experts on this subject based on the ideXlab platform.
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synchrotron micro scale measurement of metal distributions in phragmites australis and typha latifolia root tissue from an urban Brownfield Site
Journal of Environmental Sciences-china, 2016Co-Authors: Huan Feng, Yu Qian, Frank J Gallagher, Weiguo Zhang, Changjun Liu, K W Jones, Ryan TapperoAbstract:Liberty State Park in New Jersey, USA, is a "Brownfield" Site containing various levels of contaminants. To 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, respectively. The objective of this study was to understand the metal (Fe, Mn, Cu, Pb and Zn) concentration and spatial distributions in P. australis and T. latifolia root systems with micro-meter scale resolution using synchrotron X-ray microfluorescence (μXRF) and synchrotron X-ray computed microtomography (μCMT) techniques. The root structure measurement by synchrotron μCMT showed that high X-ray attenuation substance appeared in the epidermis. Synchrotron μXRF measurement showed that metal concentrations and distributions in the root cross-section between epidermis and vascular tissue were statistically different. Significant correlations were found between metals (Cu, Mn, Pb and Zn) and Fe in the epidermis, implying that metals were scavenged by Fe oxides. The results from this study suggest that the expression of metal transport and accumulation within the root systems may be element specific. The information derived from this study can improve our current knowledge of the wetland plant ecological function in Brownfield remediation.
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lead accumulation and association with fe on typha latifolia root from an urban Brownfield Site
Environmental Science and Pollution Research, 2013Co-Authors: Huan Feng, Yu Qian, Frank J Gallagher, Weiguo Zhang, Qingzhi Zhu, Kewei Zhang, Changjun Liu, Ryan TapperoAbstract:Synchrotron X-ray microfluorescence and X-ray absorption near-edge microstructure spectroscopy techniques were applied to Typha latifolia (cattail) root sections and rhizosphere soils collected from a Brownfield Site in New Jersey to investigate lead (Pb) accumulation in T. latifolia roots and the role of iron (Fe) plaque in controlling Pb uptake. We found that Pb and Fe spatial distribution patterns in the root tissues are similar with both metals present at high concentrations mainly in the epidermis and at low concentrations in the vascular tissue (xylem and phloem), and the major Pb and Fe species in T. latifolia root are Pb(II) and Fe(III) regardless of concentration levels. The sequestration of Pb by T. latifolia roots suggests a potential low-cost remediation method (phytostabilization) to manage Pb-contaminated sediments for Brownfield remediation while performing wetland rehabilitation.
Huan Feng - One of the best experts on this subject based on the ideXlab platform.
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synchrotron micro scale measurement of metal distributions in phragmites australis and typha latifolia root tissue from an urban Brownfield Site
Journal of Environmental Sciences-china, 2016Co-Authors: Huan Feng, Yu Qian, Frank J Gallagher, Weiguo Zhang, Changjun Liu, K W Jones, Ryan TapperoAbstract:Liberty State Park in New Jersey, USA, is a "Brownfield" Site containing various levels of contaminants. To 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, respectively. The objective of this study was to understand the metal (Fe, Mn, Cu, Pb and Zn) concentration and spatial distributions in P. australis and T. latifolia root systems with micro-meter scale resolution using synchrotron X-ray microfluorescence (μXRF) and synchrotron X-ray computed microtomography (μCMT) techniques. The root structure measurement by synchrotron μCMT showed that high X-ray attenuation substance appeared in the epidermis. Synchrotron μXRF measurement showed that metal concentrations and distributions in the root cross-section between epidermis and vascular tissue were statistically different. Significant correlations were found between metals (Cu, Mn, Pb and Zn) and Fe in the epidermis, implying that metals were scavenged by Fe oxides. The results from this study suggest that the expression of metal transport and accumulation within the root systems may be element specific. The information derived from this study can improve our current knowledge of the wetland plant ecological function in Brownfield remediation.
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lead accumulation and association with fe on typha latifolia root from an urban Brownfield Site
Environmental Science and Pollution Research, 2013Co-Authors: Huan Feng, Yu Qian, Frank J Gallagher, Weiguo Zhang, Qingzhi Zhu, Kewei Zhang, Changjun Liu, Ryan TapperoAbstract:Synchrotron X-ray microfluorescence and X-ray absorption near-edge microstructure spectroscopy techniques were applied to Typha latifolia (cattail) root sections and rhizosphere soils collected from a Brownfield Site in New Jersey to investigate lead (Pb) accumulation in T. latifolia roots and the role of iron (Fe) plaque in controlling Pb uptake. We found that Pb and Fe spatial distribution patterns in the root tissues are similar with both metals present at high concentrations mainly in the epidermis and at low concentrations in the vascular tissue (xylem and phloem), and the major Pb and Fe species in T. latifolia root are Pb(II) and Fe(III) regardless of concentration levels. The sequestration of Pb by T. latifolia roots suggests a potential low-cost remediation method (phytostabilization) to manage Pb-contaminated sediments for Brownfield remediation while performing wetland rehabilitation.
Frank J Gallagher - One of the best experts on this subject based on the ideXlab platform.
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synchrotron micro scale measurement of metal distributions in phragmites australis and typha latifolia root tissue from an urban Brownfield Site
Journal of Environmental Sciences-china, 2016Co-Authors: Huan Feng, Yu Qian, Frank J Gallagher, Weiguo Zhang, Changjun Liu, K W Jones, Ryan TapperoAbstract:Liberty State Park in New Jersey, USA, is a "Brownfield" Site containing various levels of contaminants. To 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, respectively. The objective of this study was to understand the metal (Fe, Mn, Cu, Pb and Zn) concentration and spatial distributions in P. australis and T. latifolia root systems with micro-meter scale resolution using synchrotron X-ray microfluorescence (μXRF) and synchrotron X-ray computed microtomography (μCMT) techniques. The root structure measurement by synchrotron μCMT showed that high X-ray attenuation substance appeared in the epidermis. Synchrotron μXRF measurement showed that metal concentrations and distributions in the root cross-section between epidermis and vascular tissue were statistically different. Significant correlations were found between metals (Cu, Mn, Pb and Zn) and Fe in the epidermis, implying that metals were scavenged by Fe oxides. The results from this study suggest that the expression of metal transport and accumulation within the root systems may be element specific. The information derived from this study can improve our current knowledge of the wetland plant ecological function in Brownfield remediation.
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lead accumulation and association with fe on typha latifolia root from an urban Brownfield Site
Environmental Science and Pollution Research, 2013Co-Authors: Huan Feng, Yu Qian, Frank J Gallagher, Weiguo Zhang, Qingzhi Zhu, Kewei Zhang, Changjun Liu, Ryan TapperoAbstract:Synchrotron X-ray microfluorescence and X-ray absorption near-edge microstructure spectroscopy techniques were applied to Typha latifolia (cattail) root sections and rhizosphere soils collected from a Brownfield Site in New Jersey to investigate lead (Pb) accumulation in T. latifolia roots and the role of iron (Fe) plaque in controlling Pb uptake. We found that Pb and Fe spatial distribution patterns in the root tissues are similar with both metals present at high concentrations mainly in the epidermis and at low concentrations in the vascular tissue (xylem and phloem), and the major Pb and Fe species in T. latifolia root are Pb(II) and Fe(III) regardless of concentration levels. The sequestration of Pb by T. latifolia roots suggests a potential low-cost remediation method (phytostabilization) to manage Pb-contaminated sediments for Brownfield remediation while performing wetland rehabilitation.
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metal accumulation and performance of nestlings of passerine bird species at an urban Brownfield Site
Environmental Pollution, 2010Co-Authors: Charles Hofer, Frank J Gallagher, Claus HolzapfelAbstract:The use of passerine species as bioindicators of metal bioaccumulation is often underutilized when examining the wildlife habitat value of polluted Sites. In this study we tested feathers of nestlings of two common bird species (house wren and American robin) for accumulation of Pb, Zn, As, Cr, Cu, Fe in comparison of a polluted, urban Brownfield with a rural, unpolluted Site. House wren nestlings at the study Site accumulated significantly greater concentrations of all target metals except Zn. At the polluted Site we found significant species differences of metal concentrations in feathers, with house wrens accumulating greater concentrations of Pb, Fe, and Zn but slightly lesser accumulations of Cr and Cu than American robins. Although house wren nestlings demonstrated significant accumulation of metals, these concentrations showed little effect on size metrics or fledge rates during the breeding season compared to nestlings from the control Site.
Changjun Liu - One of the best experts on this subject based on the ideXlab platform.
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synchrotron micro scale measurement of metal distributions in phragmites australis and typha latifolia root tissue from an urban Brownfield Site
Journal of Environmental Sciences-china, 2016Co-Authors: Huan Feng, Yu Qian, Frank J Gallagher, Weiguo Zhang, Changjun Liu, K W Jones, Ryan TapperoAbstract:Liberty State Park in New Jersey, USA, is a "Brownfield" Site containing various levels of contaminants. To 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, respectively. The objective of this study was to understand the metal (Fe, Mn, Cu, Pb and Zn) concentration and spatial distributions in P. australis and T. latifolia root systems with micro-meter scale resolution using synchrotron X-ray microfluorescence (μXRF) and synchrotron X-ray computed microtomography (μCMT) techniques. The root structure measurement by synchrotron μCMT showed that high X-ray attenuation substance appeared in the epidermis. Synchrotron μXRF measurement showed that metal concentrations and distributions in the root cross-section between epidermis and vascular tissue were statistically different. Significant correlations were found between metals (Cu, Mn, Pb and Zn) and Fe in the epidermis, implying that metals were scavenged by Fe oxides. The results from this study suggest that the expression of metal transport and accumulation within the root systems may be element specific. The information derived from this study can improve our current knowledge of the wetland plant ecological function in Brownfield remediation.
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lead accumulation and association with fe on typha latifolia root from an urban Brownfield Site
Environmental Science and Pollution Research, 2013Co-Authors: Huan Feng, Yu Qian, Frank J Gallagher, Weiguo Zhang, Qingzhi Zhu, Kewei Zhang, Changjun Liu, Ryan TapperoAbstract:Synchrotron X-ray microfluorescence and X-ray absorption near-edge microstructure spectroscopy techniques were applied to Typha latifolia (cattail) root sections and rhizosphere soils collected from a Brownfield Site in New Jersey to investigate lead (Pb) accumulation in T. latifolia roots and the role of iron (Fe) plaque in controlling Pb uptake. We found that Pb and Fe spatial distribution patterns in the root tissues are similar with both metals present at high concentrations mainly in the epidermis and at low concentrations in the vascular tissue (xylem and phloem), and the major Pb and Fe species in T. latifolia root are Pb(II) and Fe(III) regardless of concentration levels. The sequestration of Pb by T. latifolia roots suggests a potential low-cost remediation method (phytostabilization) to manage Pb-contaminated sediments for Brownfield remediation while performing wetland rehabilitation.
Weiguo Zhang - One of the best experts on this subject based on the ideXlab platform.
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synchrotron micro scale measurement of metal distributions in phragmites australis and typha latifolia root tissue from an urban Brownfield Site
Journal of Environmental Sciences-china, 2016Co-Authors: Huan Feng, Yu Qian, Frank J Gallagher, Weiguo Zhang, Changjun Liu, K W Jones, Ryan TapperoAbstract:Liberty State Park in New Jersey, USA, is a "Brownfield" Site containing various levels of contaminants. To 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, respectively. The objective of this study was to understand the metal (Fe, Mn, Cu, Pb and Zn) concentration and spatial distributions in P. australis and T. latifolia root systems with micro-meter scale resolution using synchrotron X-ray microfluorescence (μXRF) and synchrotron X-ray computed microtomography (μCMT) techniques. The root structure measurement by synchrotron μCMT showed that high X-ray attenuation substance appeared in the epidermis. Synchrotron μXRF measurement showed that metal concentrations and distributions in the root cross-section between epidermis and vascular tissue were statistically different. Significant correlations were found between metals (Cu, Mn, Pb and Zn) and Fe in the epidermis, implying that metals were scavenged by Fe oxides. The results from this study suggest that the expression of metal transport and accumulation within the root systems may be element specific. The information derived from this study can improve our current knowledge of the wetland plant ecological function in Brownfield remediation.
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lead accumulation and association with fe on typha latifolia root from an urban Brownfield Site
Environmental Science and Pollution Research, 2013Co-Authors: Huan Feng, Yu Qian, Frank J Gallagher, Weiguo Zhang, Qingzhi Zhu, Kewei Zhang, Changjun Liu, Ryan TapperoAbstract:Synchrotron X-ray microfluorescence and X-ray absorption near-edge microstructure spectroscopy techniques were applied to Typha latifolia (cattail) root sections and rhizosphere soils collected from a Brownfield Site in New Jersey to investigate lead (Pb) accumulation in T. latifolia roots and the role of iron (Fe) plaque in controlling Pb uptake. We found that Pb and Fe spatial distribution patterns in the root tissues are similar with both metals present at high concentrations mainly in the epidermis and at low concentrations in the vascular tissue (xylem and phloem), and the major Pb and Fe species in T. latifolia root are Pb(II) and Fe(III) regardless of concentration levels. The sequestration of Pb by T. latifolia roots suggests a potential low-cost remediation method (phytostabilization) to manage Pb-contaminated sediments for Brownfield remediation while performing wetland rehabilitation.
