Research Achievements - Original paper -

Environmental risk assessment of the contamination of river water and sediments from the Bor mining area, East Serbia. Secondary Cu enrichment at the reservoir site

Olaotse Osenyeng, Daizo Ishiyama, Stefan Đorđievski, Dragana Adamović, Yasumasa Ogawa

Resource Geology   73   12314   2023.06  [Refereed]

Research paper (journal)   Single author

セルビア国ボール鉱山由来の銅、ヒ素の河川流下過程の挙動の下流のダム湖での銅の濃集についての研究

DOI

Leaching behavior of arsenic and selenium in coal fly ash by aging treatment and cement mixing

Tsugumi Seki, Yasumasa Ogawa, Koki Ibi, Taiji Chida, Chihiro Inoue, Yuichi Niibori

Journal of Nuclear Science and Technology   60   1169 - 1181   2023.03  [Refereed]

Research paper (journal)   Domestic Co-author

石炭灰からの有害元素の溶出抑制についての研究

Geochemical characteristics and estimation of groundwater pollution in catchment areas of Timok and Pek Rivers, Eastern Serbia: Determination of early-stage groundwater pollution in mining areas

Adamovic D., Ishiyama D., Kawaraya H., Ogawa Y., Zoran S.

GROUNDWATER FOR SUSTAINABLE DEVELOPMENT ( ELSEVIER )  16   100719   2022.02

Research paper (journal)   Single author

セルビア東部Bor鉱山周辺の地下水への鉱山活動の影響調査。

DOI

Geochemical mobility of rare earth elements (REEs) and actinides (U and Th) originating from Kusatsu acid thermal waters during neutralization and river transport: Effect of aqueous speciation on sorption onto suspended materials and fractionation among REEs and actinides

Ogawa　Y., Ishiyama D., Đorđievski S., Petrović J., Milivojević M., Saini-Eidukat B, Wood S.A

Chemical Geology ( ELSEVIER )  586 ( 30 ) 120559   2021.12

Research paper (journal)   Single author

草津酸性泉は湯川、白砂川を経て吾妻川へと流入する。草津酸性泉由来のレアアース、トリウム、ウランは下流に向かうにつれ、懸濁物に吸着する。ウランは弱酸性領域まで懸濁物への吸着が生じるが、中性～弱アルカリ性領域ではCO3錯体を形成するため吸着は起こりにくくなり、溶存成分として流下する。レアアースは単純にｐH上昇により懸濁物への吸着が促進されるが、軽希土類の方が吸着されにくい傾向がある。

DOI

Geochemistry of natural acid rock drainage in the Judith Mountains, Montana, part 2: Seasonal and spatial trends in Chicago Gulch

Gammons C.H., Edinberg S.C., Parker S.R., Ogawa Y.

Applied Geochemistry ( ELSEVIER )  129   104968   2021.06

Research paper (journal)   Single author

アメリカモンタナ州Judith Mountain山頂部から発生する酸性水中の有害成分の流下過程の地球化学的挙動について

DOI

Leaching of As and Se from coal fly ash: Fundamental study for coal fly ash recycling

Tsugumi Seki, Kengo Nakamura, Yasumasa Ogawa, Chihiro Inoue

Environmental Monitoring and Assessment   193   225   2021.03  [Refereed]

Research paper (journal)   Single author

石炭灰からの有害元素の溶出特性についての研究

Classification of coal fly ash based on pH, CaO content, glassy components, and leachability of toxic elements

Seki T, Ogawa Y, Inoue C

Environmental monitering and assessment   191 ( 6 ) 358   2019.06  [Refereed]

Research paper (journal)   Domestic Co-author

Fractionation of rare earth elements (REEs) and actinides (U and Th) originating from acid thermal water during artificial and natural neutralization processes of surface waters

Y. Ogawa, D. Ishiyama, N. Shikazono, K. Iwane, T. Hoshino, M. Kajiwara, N. Tsuchiya, B. Saini-Eidukat, S.A. Wood

Geochimica et Cosmochimica Acta   249   247 - 262   2019.01  [Refereed]

Research paper (journal)   Domestic Co-author

Vertical variation of lead content in sediment collected from man-made Tamagawa Dam Lake in Akita Prefecture, Japan

Pham Q.M., Ishiyama D. Sato H., Ogawa Y.

Resource Geology   68 ( 3 ) 244 - 257   2018.11  [Refereed]

Research paper (journal)   Domestic Co-author

Immobilization of Boron and Arsenic in Alkaline Coal Fly Ash through an Aging Process with Water and Elucidation of the Immobilization Mechanism

Y. Ogawa, K. Sakakibara, T. Seki, C. Inoue

Water, Air, & Soil Pollution   229   359   2018.10  [Refereed]

Research paper (journal)   Domestic Co-author

Mobility and natural attenuation of metals and arsenic in acidic waters of the drainage system of Timok River from Bor copper mines (Serbia) to Danube River

S. Đorđievski D. Ishiyama, Y. Ogawa, Z Stevanović

Environmental Science and Pollution Research   25   25005 - 25019   2018.06  [Refereed]

Research paper (journal)   Domestic Co-author

Factors controlling the fractionation and seasonal mobility variations of Ga and In in systems impacted by acidic thermal waters: effects of thermodynamics and bacterial activity

Y. Ogawa, D. Ishiyama, N. Shikazono, K. Suto, C. Inoue, N. Tsuchiya, B. SainiEidukat, S.A. Wood

Aquatic Geochemistry   24   5 - 25   2018.01  [Refereed]

Research paper (journal)   Domestic Co-author

Machine-learning techniques for geochemical discrimination of 2011 Tohoku tsunami deposits

Kuwatani T, Nagata K, Okada M, Watanabe Y, Ogawa Y, Komai T, Tsuchiya N

Scientific Reports   4   7077   2014.11  [Refereed]

Research paper (journal)   Domestic Co-author

Immobilization of B, F, Cr, and As in alkaline coal fly ash through an aging process with water

Y. Ogawa, K. Sakakibara, L. Wang, K. Suto, C. Inoue

Environmental Monitoring and Assessment   10   6757 - 6770   2014.07  [Refereed]

Research paper (journal)   Domestic Co-author

The fate of arsenic in a river acidified by volcanic activity and an acid thermal water and sedimentation mechanism

Y. Ogawa, R. Yamada, K. Shinoda, C. Inoue, N. Tsuchiya

Environmental Science: Processes and Impacts   16   2325 - 2334   2014.07  [Refereed]

Research paper (journal)   Domestic Co-author

Effects of the Chemical Compositions of Salars de Uyuni and Atacama Brines on Lithium Concentration during Evaporation

Y. Ogawa, H. Koibuchi, K. Suto, C. Inoue

Resource Geology   64 ( 2 ) 91 - 101   2014.06  [Refereed]

Research paper (journal)   Domestic Co-author

Bioessential element-depleted ocean following the euxinic maximum of the end-Permian mass extinction

Takahashi S, Yamasaki S, Ogawa Y, Kuwatani T, Kimura K, Kaiho K, Yoshida T, Tsuchiya N

Earth and Planetary Science Letters   393   94 - 104   2014.05  [Refereed]

Research paper (journal)   Domestic Co-author

Fractionation and deposition of indium and arsenic from the Kusatsu and Tamagawa acidic hot springs, Japan: Possible man-made analogues for rare metal concentrations onto lake beds?

Y. Ogawa, D. Ishiyama, N. Shikazono, K. Iwane, M. Kajiwara, N. Tsuchiya

Economic Geology   108   1641 - 1656   2013.11  [Refereed]

Research paper (journal)   Domestic Co-author

Interpretation of mineral ｚoning in submarine hydrothermal ore deposits in terms of coupled fluid flow-precipitation kinetics model

N. Shikazono, H. Kawabe, Y. Ogawa

Resource Geology   62 ( 4 ) 352 - 368   2012.10  [Refereed]

Research paper (journal)   Domestic Co-author

黒鉱鉱床中で，重晶石は鉱床上部に，石英は鉱床下部に分布する．このような分布が生じる理由は，化学平衡モデルからは説明できない．一方で，熱水，海水の流動性を考慮した完全混合モデルによる沈殿速度計算では，実際の黒鉱鉱床で見られる鉱物間の分離が起こり得ることが判明した．また，海水，熱水の混合により段階的に地球化学条件が変化する多段階モデルによる速度論計算では，海底下での熱水と海水の混合により沈殿し得ることが示され，海底面上で生成すると考えられる重晶石との産状の違いと一致する結果となった．

The role of hydrous ferric oxide precipitation in the fractionation of arsenic, gallium, and indium during the neutralization of acidic hot spring water by river water in the Tama River watershed, Japan

Y. Ogawa, D. Ishiyama, N. Shikazono, K. Iwane, M. Kajiwara, N. Tsuchiya

Geochimica et Cosmochimica Acta   86   367 - 383   2012.06  [Refereed]

Research paper (journal)   Domestic Co-author

秋田県渋黒川―玉川は玉川温泉由来の酸性水が流入する．流下過程のpHが上昇するに従い，鉄水酸化物が生成され，上流から下流に向けてヒ素，ガリウム，インジウムの順でこれらに吸着される．これらを吸着した鉄水酸化物は下流の玉川ダムによる人造湖（宝仙湖）湖底に沈殿する．ヒ素，ガリウムは上流部で吸着されることから，河川流域の堆積物に広範囲に分布するのに対し，玉川ダムによる人造湖（宝仙湖）入口付近で吸着するインジウムは宝仙湖湖底に選択的に濃集される．また，鉄の酸化反応は暖かい季節に起こりやすいので，ヒ素，ガリウムは夏場により効率的に吸着される傾向がある．