Bio-PIXE AT THE TAKIZAWA FACILITY (Bio-PIXE WITH A BABY CYCLOTRON)

Sera, K.; Yanagisawa, Toru; Tsunoda, Humio; Futatsugawa, S.; Hatakeyama, Satoru; Saitoh, Y.; Suzuki, S.; Orihara, H.

doi:10.1142/s0129083592000348

Cited by 178 publications

(35 citation statements)

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“…About 15 cm 2 of each sample was crushed to a fine powder with a powder mill (Varian PM-2005m, Osaka Chemical Co., Ltd., Osaka, Japan) to produce homogeneous samples for analysis. The tree bark powders (30 mg of each sample) were digested with a mixture of indium (In) and HNO 3 in a ratio of 3:100, before the heavy metal concentrations such as Pb, Zn, Fe (especially Hg), and As were determined with PIXE [19,20] at Iwate Medical University (Iwate, Japan). The dimensions of the tree bark samples (about 15 cm 2 ) were calculated with the ImageJ (version 1.48) software (National Institutes of Health, Bethesda, MD, USA).…”

Section: Sample Preparationmentioning

confidence: 99%

Mangifera indica as Bioindicator of Mercury Atmospheric Contamination in an ASGM Area in North Gorontalo Regency, Indonesia

et al. 2018

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Abstract:We report the atmospheric Hg contamination in an artisanal and small-scale gold mining (ASGM) area in North Gorontalo, Indonesia. It is well known that atmospheric Hg contaminates the air, water, soil, and living organisms, including trees. In this study, we calculated total weight of heavy metals, especially Hg, and quantitatively measure the concentrations of heavy metals, especially Hg, in tree bark from an ASGM area. Tree bark can be used for the environmental assessment of atmospheric contamination because it attaches and absorbs heavy metals. Atmospheric Hg and other heavy metals, including Fe and Mn, and As were detected on the tree bark samples. The total weight of Hg, As, Fe, and Mn in the tree bark samples ranged from undetectable (ND) to 9.77, ND to 81.3, 124-4028, 37.0-1376 µg dry weight (DW), respectively per weight of sample. Based on quantitatively analysis micro-PIXE, the highest concentrations of all these metals were detected in the outer part of the bark. We conclude that tree bark can adsorb atmospheric contamination, which is then absorbed into the inner tissues.

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Section: Sample Preparationmentioning

confidence: 99%

Mangifera indica as Bioindicator of Mercury Atmospheric Contamination in an ASGM Area in North Gorontalo Regency, Indonesia

et al. 2018

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“…Once dry, the samples were crushed to fine powder using a powder mill (Varian PM-2005 m, Osaka Chemical Co., Ltd, Osaka, Japan). The shoot powder (30 mg of each sample) was digested with a mixture of In:HNO 3 at a ratio of 3:100 before determination of the heavy metal concentrations by particle induced X-ray emission (PIXE) [17] at Cyclotron Center of Iwate Medical University, Iwate, Japan. Then, 20 mg of both the roots and shoots were digested with a solution of H 2 O 2 , HF, and HNO 3 at a ratio of 2:5:10 before heavy metal concentrations were determined by inductively coupled plasma-optical emission spectrometry (ICP-OES) (Varian Optima TM 8300 series, PerkinElmer, Kanagawa, Japan) at the Integrated Centre for Sciences, Ehime University, Matsuyama, Japan.…”

Section: Methodsmentioning

confidence: 99%

Pteris cretica as a Potential Biomarker and Hyperaccumulator in an Abandoned Mine Site, Southwest Japan

et al. 2016

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Abstract:This study aimed to determine the potential of naturally occurring Cretan brake fern (Pteris cretica) as a biomarker and hyperaccumulator in an abandoned mine in Southwest Japan. This species is a known hyperaccumulator of As. Total concentrations of heavy metals and As were determined in the shoots and roots of plants collected from inside and outside of the mine area. The results indicate that As and Pb in the shoots of P. cretica reached 1290 and 3840 mg/kg dry weight, respectively, which is classified as hyperaccumulation. The metal uptake intensity in the shoots indicates that P. cretica is a biomarker for As, Pb, and Zn. Furthermore, the metal concentrations, and bioconcentration and translocation factors indicate that P. cretica is a good candidate for phytoremediation of sites that are contaminated with As and Pb.

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“…The analytical conditions followed Sera et al (1992) [26]. A small cyclotron provides a 2.9 MeV-proton beam on the target after passing through a beam collimator of graphite.…”

Section: Methodsmentioning

confidence: 99%

Heavy Metal Behavior in Lichen-Mine Waste Interactions at an Abandoned Mine Site in Southwest Japan

Sueoka

Sakakibara

Sera

2015

Metals

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Abstract:The lichen, Stereocaulon exutum Nylander, occurring in a contaminated abandoned mine site was investigated to clarify (1) the behavior of heavy metals and As during the slag weathering processes mediated by the lichen; and (2) the distribution of these elements in the lichen thallus on slag. The heavy metals and As in the slag are dissolved from their original phases during the weathering process by lichen substances (organic acids) and hypha penetration, in addition to non-biological weathering. The dissolved elements are absorbed into the lichen thallus. Some of these dissolved elements are distributed in the cells of the hyphae. The others are distributed on the surface of the hyphae as formless particles and show lateral distribution inside the cortex of the thallus. The Cu and Zn concentrations in the thalli are positively correlated with the concentrations in the corresponding substrata and a positive intercept in the regression curve obtained using a linear function. These chemical characteristics make this lichen a good biomarker for Cu and Zn contamination of the substrata of the lichen. Therefore, the present study supposes that Stereocaulon exutum has a possible practical application in biomonitoring or risk assessment of heavy metal pollution at abandoned mine sites.

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Bio-PIXE AT THE TAKIZAWA FACILITY (Bio-PIXE WITH A BABY CYCLOTRON)

Cited by 178 publications

References 0 publications

Mangifera indica as Bioindicator of Mercury Atmospheric Contamination in an ASGM Area in North Gorontalo Regency, Indonesia

Mangifera indica as Bioindicator of Mercury Atmospheric Contamination in an ASGM Area in North Gorontalo Regency, Indonesia

Pteris cretica as a Potential Biomarker and Hyperaccumulator in an Abandoned Mine Site, Southwest Japan

Heavy Metal Behavior in Lichen-Mine Waste Interactions at an Abandoned Mine Site in Southwest Japan

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