Environmental Radioactivity Research Network Center

What is ERAN?

ERAN (Environmental Radioactivity Research Network Center) has been recognized by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) as a Joint Usage / Research Center since 2019.
ERAN consists of six organizations: CRiED of Univ. of Tsukuba, IER of Fukushima Univ., and IREM of Hirosaki Univ. as network centers, and JAEA, QST, and NIES as cooperative network centers.
We are convinced that the results of the joint research and international efforts will be critical to the recovery and possible future events.

Hot Topics

Terrestrial and River

www.sciencedirect.com

Radiocesium distribution and mid-term dynamics in the ponds of the Fukushima Dai-ichi nuclear power plant exclusion zone in 2015–2019

~~https://www.sciencedirect.com/science/article/pii/S0045653520332550?via=ihub~~

This study analyzes the 137Cs behavior in the ponds of Okuma Town from 2015 to 2019 in the Fukushima Dai-ichi nuclear power plant (FDNPP) exclusion zo…

MDPI

Temporal and Spatial Variation of Radon Concentrations in Environmental Water from Okinawa Island, Southwestern Part of Japan

https://www.mdpi.com/1660-4601/18/3/998

In this study, to get a better understanding in characterizing groundwater and ensure its effective management, the radon concentrations in water samples were measured through Ryukyu limestone in southern Okinawa Island, Japan. Water samples were collected from a limestone cave (Gyokusendo cave, dropping water) and two springs (Ukinju and Komesu, spring water), and the radon concentrations were measured by liquid scintillation counters. The radon concentrations in the samples from the Gyokuse...

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Impacts of freeze-thaw processes and subsequent runoff on 137Cs washoff from bare land in Fukushima

~~https://www.sciencedirect.com/science/article/pii/S0048969720382395?via=ihub~~

The deposited 137Cs is one of the long-lived radionuclides, that was released following the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident, h…

Forest

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Evaluation of contribution rate of the infiltrated water collected using zero-tension lysimeter to the downward migration of 137Cs derived from the FDNPP accident in a cedar forest soil

~~https://www.sciencedirect.com/science/article/pii/S0048969721070595?via=ihub~~

The vertical distribution of 137Cs in forest soil is important for predicting air dose rates and future cycling in forest ecosystems. However, there a…

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Vertical distribution and transport of radiocesium via branchflow and stemflow through the canopy of cedar and oak stands in the aftermath of the Fukushima Dai-ichi Nuclear Power Plant accident

~~https://www.sciencedirect.com/science/article/pii/S0048969721067747?via=ihub~~

Aiming to fill a need for data regarding radiocesium transport via both branchflow and stemflow through forests impacted by radioactive fallout, this …

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Scots pine stands biomass assessment using 3D data from unmanned aerial vehicle imagery in the Chernobyl Exclusion Zone

~~https://www.sciencedirect.com/science/article/pii/S0301479721013815?via=ihub~~

Thirty-five years after the accident, large forest areas in the Chernobyl Exclusion Zone still contain huge amounts of radionuclides released from the…

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Radiocesium leaching from litter during rainstorms in the Fukushima broadleaf forest

~~https://www.sciencedirect.com/science/article/pii/S0048969721040018?via=ihub~~

Forests are important sources of dissolved radiocesium (137Cs) discharge downstream. To improve understanding of dissolved 137Cs discharge processes d…

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Speciation of cesium in tree tissues and its implication for uptake and translocation of radiocesium in tree bodies

~~https://www.sciencedirect.com/science/article/pii/S0048969720361271?via=ihub~~

Since the Chernobyl and Fukushima nuclear power plant accidents, extensive research has focused on the distribution and cycle of radiocesium in forest…

Air

Journal of Radioanalytical and Nuclear Chemistry

Characterization of atmospheric 210Pb concentration and its relation to major ion species at Tsukuba, Japan - Journal of Radioanalytical and Nuclear Chemistry

https://link.springer.com/article/10.1007/s10967-020-07568-w

TSP and atmospheric 210Pb concentrations were observed at Tsukuba, Japan during July 2001 to March 2005. TSP concentrations ranged from 14.5 to 152.4 µg m−3. 210Pb concentrations ranged from 0.04 to 0.86 mBq m−3 which was low in summer and high in winter to spring. Although TSP concentrations changed annually, 210Pb concentrations had almost the same concentration level and seasonal variation. The correlation coefficient between 210Pb concentration and NO3− concentration was slightly higher t...

Ocean

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Planned release of contaminated water from the Fukushima storage tanks into the ocean: Simulation scenarios of radiological impact for aquatic biota and human from seafood consumption

~~https://www.sciencedirect.com/science/article/pii/S0025326X21010031?via=ihub~~

The radiological impact for human and aquatic biota as a result of a planned release of contaminated water stored in tanks near the Fukushima Dai-ichi…

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Spatiotemporal change of cesium-137 in the Pacific coast of Tohoku, Japan: The mussel watch approach

~~https://www.sciencedirect.com/science/article/pii/S0025326X21004471?via=ihub#ac0005~~

We measured radiocesium in mussel tissue collected from the Pacific coast of Tohoku from 2011 to 2015 to investigate the temporal and spatial dynamics…

Scientific Reports

First isolation and analysis of caesium-bearing microparticles from marine samples in the Pacific coastal area near Fukushima Prefecture

https://www.nature.com/articles/s41598-021-85085-w

Chemistry

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Syntheses, characterization, and antimicrobial studies of Ni(II), Cu(II), and Co(III) complexes with an N-pendant azamacrocyclic chelator

~~https://www.sciencedirect.com/science/article/pii/S0022286021007122?via=ihub#!~~

Condensation of 1,2-diamino propane with acetone in the presence of perchloric acid furnished a 14-membered octamethyl tetraazamacrocycle, Me8dien…

MDPI

Preferential Elimination of Ba2+ through Irreversible Biogenic Manganese Oxide Sequestration

https://www.mdpi.com/2075-163X/11/1/53

Biogenic manganese oxides (BMOs) formed in a culture of the Mn(II)-oxidizing fungus Acremonium strictum strain KR21-2 are known to retain enzymatic Mn(II) oxidation activity. Consequently, these are increasingly attracting attention as a substrate for eliminating toxic elements from contaminated wastewaters. In this study, we examined the Ba2+ sequestration potential of enzymatically active BMOs with and without exogenous Mn2+. The BMOs readily oxidized exogenous Mn2+ to produce another BMO p...

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Effective removal of iodate by coprecipitation with barite: Behavior and mechanism

~~https://www.sciencedirect.com/science/article/pii/S0045653520333014?via=ihub~~

Radioactive iodine (129I) is of great concern owing to its high mobility in the environment and long-term radiotoxicity. However, there is a lack of e…