Sediment-Water Distribution Coefficients of Stable Elements in Four Estuarine Areas in Japan

Takata, Hyoe; Aono, Tatsuo; Tagami, Keiko; Uchida, Shunsuke

doi:10.1080/18811248.2010.9711933

Cited by 13 publications

(2 citation statements)

References 27 publications

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“…Concentrations of 133 Cs in surface sediments were determined only in the samples collected in May 2014 and February 2015 by ICP-MS after complete dissolution by HNO 3 and HF as described previously43. Approximately 10% precision was achieved for the measurements.…”

Section: Methodsmentioning

confidence: 99%

Temporal variation of cesium isotope concentrations and atom ratios in zooplankton in the Pacific off the east coast of Japan

Ikenoue

Takata

Kusakabe

et al. 2017

Sci Rep

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After the Fukushima Daiichi Nuclear Power Plant accident in March 2011, concentrations of cesium isotopes (133Cs, 134Cs, and 137Cs) were measured in zooplankton collected in the Pacific off the east coast of Japan from May 2012 to February 2015. The time series of the data exhibited sporadic 137Cs concentration peaks in zooplankton. In addition, the atom ratio of 137Cs/133Cs in zooplankton was consistently high compared to that in ambient seawater throughout the sampling period. These phenomena cannot be explained fully by the bioaccumulation of 137Cs in zooplankton via ambient seawater intake, the inclusion of resuspended sediment in the plankton sample, or the taxonomic composition of the plankton. Autoradiography revealed highly radioactive particles within zooplankton samples, which could be the main factor underlying the sporadic appearance of high 137Cs concentrations in zooplankton as well as the higher ratio of 137Cs/133Cs in zooplankton than in seawater.

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Section: Methodsmentioning

confidence: 99%

Temporal variation of cesium isotope concentrations and atom ratios in zooplankton in the Pacific off the east coast of Japan

Ikenoue

Takata

Kusakabe

et al. 2017

Sci Rep

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“…For CR, values for a biogeochemical analogue element (caesium), which has similar behaviour under same conditions (IAEA, 2014;Newman, 2010) were obtained from ERICA. For water Kd values, recent measurements by Takata et al (2010) have determined partitioning values for potassium in the estuaries of four rivers of Japan to be equal 7.9 l/kg. These measurements were performed for river estuaries, intermediary systems between river and sea, thus we assume this value for both seawater and freshwater compartments.…”

Section: Environmental Releases Human Health and Ecosystem Impactmentioning

confidence: 99%

Impact assessment of enhanced exposure from Naturally Occurring Radioactive Materials (NORM) within LCA

Goronovski

Joyce

Björklund

et al. 2018

Journal of Cleaner Production

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The potential impact of ionising radiation from enhanced exposure to Naturally Occurring Radioactive Materials (NORM) to humans and the environment is not currently accounted for sufficiently in Life Cycle Assessment (LCA). Here we present midpoint and endpoint characterisation factors resulting from the implementation of impact assessment models for human health and ecosystems for NORM exposure. These models build upon existing fate, exposure and effect models from the LCA and radiological literature. The newly developed models are applied to a theoretical study of the utilisation of bauxite residue, a by-product of alumina processing enriched in natural radionuclides, in building materials. The ecosystem models have significant sensitivity to uncertainties surrounding the differential environmental fate of parent and daughter radionuclides that are produced as a part of decay chains, and to assumptions regarding long term releases from landfill sites. However, conservative results for environmental exposure suggest that in addition to landfill of materials, power consumption (burning coal and mining uranium) is a potentially significant source of radiological impact to the environment. From a human perspective, exposure to NORM in the use phase of building materials is the dominant source of impact, with environmental releases of nuclides playing a comparatively minor role. At an endpoint level, the impact of NORM exposure is highly significant in comparison to other impact categories in the area of protection of human health.The dose increase is of an order of magnitude comparable to lifestyle factors. The results highlight the importance within LCA of having sufficient impact assessment models to capture all potential impacts, such that issues of burden shifting between impact measures can be captured, interpreted and resolved in the optimisation of product systems. Highlights A new life cycle impact assessment model for exposure to NORM is presented  Midpoint and endpoint characterisation factors for humans and ecosystems are given  The models are validated with respect to bauxite residue valorisation systems  The importance of burden shifting within life cycle impact assessment is raised

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Concentration ratios of stable elements for selected biota in Japanese estuarine areas

Takata¹,

Aono²,

Tagami³

et al. 2010

Radiat Environ Biophys

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For the estimation of radiation doses to organisms, concentration ratios (C ( R )s) of radionuclides are required. In the present study, C(R)s of various elements were obtained as analogues of radionuclides for algae, molluscs, and crustaceans, in eight estuarine areas around Japan. The elements measured were Na, Mg, K, Ca, V, Mn, Fe, Co, Ni, Cu, Rb, Sr, Y, Mo, Cd, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Pb, and U. The geometric mean (GM) values of C(R)s (GM-C(R)s) for alkali and alkaline earth elements, Mo, and U for all biota, as well as V for crustaceans, were less than 100 L/kg, while GM-C(R)s for the other elements were higher. When the obtained GM-C(R)s were compared with the C(R)s recommended in IAEA Technical Report Series 422 for marine organisms, no big differences between them were found; however, several elements (i.e. Cd and U for algae, Mn for molluscs, and Pb for crustaceans) were lower than the recommended C(R)s. In the present study, conversion factors (the ratio of C(R) for the whole body to that for muscle) for molluscs and crustaceans were also calculated, since data on edible parts of these organisms are generally available in the literature. For crustaceans, GM conversion factors of all the elements were more than one. For molluscs, GM conversion factors of rare earth elements and U were slightly higher than those for crustaceans, while GM conversion factors of the other elements were almost the same and less than 10. These results indicate that some elements tend to be concentrated in the internal organs of biota collected in the estuarine areas. For environmental radiological assessment, conversion factors from tissue to whole-body C(R) values are useful parameters.

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Sediment-Water Distribution Coefficients of Stable Elements in Four Estuarine Areas in Japan

Cited by 13 publications

References 27 publications

Temporal variation of cesium isotope concentrations and atom ratios in zooplankton in the Pacific off the east coast of Japan

Temporal variation of cesium isotope concentrations and atom ratios in zooplankton in the Pacific off the east coast of Japan

Impact assessment of enhanced exposure from Naturally Occurring Radioactive Materials (NORM) within LCA

Concentration ratios of stable elements for selected biota in Japanese estuarine areas

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