Faculty Profiles - HAMADA Yuriko

写真a

HAMADA Yuriko

Organization

Research Field in Cooperation, Integrated Arts and Sciences Area ? Assistant Professor

Degree

Ph.D ( 2010.9 Kagoshima University )

Research Interests

水銀汚染バイオモニタリング　廃液処理　排水管理

Research Areas

Others / Others / 環境化学

Research History

Kagoshima University Research Field in Cooperation, Integrated Arts and Sciences Area ? Assistant Professor

2019.4
Kagoshima University Research Field in Integrated Studies, Integrated Arts and Sciences Area National Science Center for Research and Education Environment and Safety Center Assistant Professor

2010.4 - 2019.3

Professional Memberships

日本植物学会

2015.10
日本分析化学会

2015.10

Papers

Takashi Tomiyasu, Christine Baransano, Yuriko Kono Hamada, Hitoshi Kodamatani, Ryo Kanzaki, Nuril Hidayati, Joeni Setijo Rahajoe . Distribution of total and organic mercury in soils around an artisanal and small-scale gold mining area in West Java, Indonesia . SN APPLIED SCIENCES2 ( 7 ) 2020.6Reviewed International journal

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Authorship：Lead author,　Last author,　Corresponding author Publisher：SPRINGER INTERNATIONAL PUBLISHING AG

This study was conducted to understand the environmental behavior of mercury released by artisanal and small-scale gold mining (ASGM) activities. For this purpose, we attempted to assess the effect of diffused mercury on mercury concentrations in soil, demonstrate the presence of methylmercury in soil affected by the deposited mercury and determine the reactions associated with methylmercury production. The vertical profiles of mercury were obtained from two sites in the forest of the ASGM village in Pongkor (West Java, Indonesia) and from two sites in Mount Halimun-Salak National Park, which is approximately 12 km from the ASGM village. The highest total mercury concentration, 8.9 mg kg(-1), was observed for soil samples collected at the ASGM village. The mercury was concentrated at the surface or in the subsurface layers, and the concentrations were several times to more than ten times higher than the lowest values observed in the deeper layers at each site. Even in the national park, the highest concentration of 1.9 mg kg(-1) was observed in the upper soil layer. These results suggest that the primary source of mercury in the forest soil is atmospheric deposition; fallen plant leaves also deliver accumulated mercury to the soil surface. The organic mercury percentages of the total mercury were 0.2 +/- 0.1% for the national park and 0.3 +/- 0.2% for ASGM sites. The vertical variation in organic mercury concentration did not always match that in total mercury concentration, which suggested that the formation of methylmercury in soil was closely related to the decomposition of organic matter near the surface. The soil surface is an important reaction field for methylmercury production in forested areas.

DOI： 10.1007/s42452-020-3008-5

Web of Science

Scopus
Takashi Tomiyasu, Yuriko Kono Hamada, Christine Baransano, Hitoshi Kodamatani, Akito Matsuyama, Ryusuke Imura, Nuril Hidayati, Joeni Setijo Rahajoe . Mercury concentrations in paddy feld soil and freshwater snails around a small‑scale gold mining area, West Java, Indonesia . Toxicology and Environmental Health Sciences12 ( 1 ) 23 - 29 2020.3Mercury concentrations in paddy feld soil and freshwater snails around a small‑scale gold mining area, West Java, IndonesiaReviewed

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Language：English Publishing type：Research paper (scientific journal)
Takashi Tomiyasu, Yuriko Kono Hamada, Christine Baransano, Hitoshi Kodamatani, Akito Matsuyama, Ryusuke Imura, Nuril Hidayati, Joeni Setijo Rahajoe . Mercury concentrations in paddy field soil and freshwater snails around a small-scale gold mining area, West Java, Indonesia . TOXICOLOGY AND ENVIRONMENTAL HEALTH SCIENCES12 ( 1 ) 23 - 29 2020.3Reviewed

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Authorship：Lead author,　Last author,　Corresponding author Publisher：KOREAN SOC ENVIRONMENTAL RISK ASSESSMENT & HEALTH SCIENCE

Objective To estimate the impact of mercury released from an artisanal small-scale gold mining (ASGM) activities on the ecosystem. Methods Total and organic mercury concentrations in paddy field soil and freshwater snails around an artisanal small-scale gold mining area were investigated. Paddy field soil samples and freshwater snails were collected from ten sites along the Cikaniki River. A site located in a national park, which was approximately 12 km upstream from the ASGM site, was considered the reference site for this study. Results The organic mercury concentration in soil samples collected at the ASGM site was n.d.-0.018 mg kg(-1) and that at the reference site was 0.005-0.008 mg kg(-1). The organic mercury concentrations in the freshwater snails collected at the ASGM and reference sites were 0.38 +/- 0.21 mg kg(-1) (31.0 +/- 26.6% of total mercury, n = 38) and 0.056 +/- 0.032 mg kg(-1) (40.5 +/- 11.5% of total mercury, n = 16), respectively. Conclusion Although the original form of mercury in the mining waste was elemental mercury and/or Hg2+, the mercury form changed to organic mercury in environment and the organic mercury was concentrated two orders of magnitude, even in low-order organisms.

DOI： 10.1007/s13530-020-00045-7

Web of Science

Scopus
Takashi Tomiyasu, Yuriko Kono Hamada, Christine Baransano, Nuril Hidayati, Joeni Setijo Rahajoe . Time variation in transfer amounts of mercury by a river system near an artisanal and small-scale gold mining area in West Java, Indonesia . Environmental Earth Sciences volume ( 78 ) 2019.12Time variation in transfer amounts of mercury by a river system near an artisanal and small-scale gold mining area in West Java, IndonesiaReviewed

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Language：English Publishing type：Research paper (scientific journal)
Takashi Tomiyasu, Yuriko Kono Hamada, Christine Baransano, Nuril Hidayati, Joeni Setijo Rahajoe . Time variation in transfer amounts of mercury by a river system near an artisanal and small-scale gold mining area in West Java, Indonesia . ENVIRONMENTAL EARTH SCIENCES78 ( 24 ) 2019.12Reviewed

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Authorship：Lead author,　Last author,　Corresponding author Publisher：SPRINGER

To evaluate the impact of mercury released into a river system by artisanal and small-scale gold mining (ASGM) activity in West Java, Indonesia, the temporal variations in elemental mercury, mercury ions, dissolved total mercury and particulate mercury concentrations in river water were observed in March 2015 (rainy season) and August 2015 (dry season) at a fixed observation point, and the migrated amount of mercury was estimated. Variations for other metals, total organic carbon (TOC), and total nitrogen (TN) contents were also measured. There have been few reports in which the amount of mercury transferred from ASGM activities is quantitatively estimated, and this study provides important data for evaluating the environmental impact of mercury released by ASGM activities. The concentration of filtered total mercury and the particulate mercury concentration observed in the dry season were 161 +/- 167 mu g L-1 and 142 +/- 93 mu g L-1, respectively, and these values were significantly higher than the values of 24.5 +/- 23.9 mu g L-1 and 53.7 +/- 44 mu g L-1 for filtered total mercury and particulate mercury, respectively, observed in the rainy season. On the other hand, the river flow in the rainy and dry seasons was 2.6 x 10(4) +/- 5x10(3) m(3) h(-1) and 8.2 x 10(3) +/- 8x10(2) m(3) h(-1), respectively, and an apparent increase in the amount of water in the rainy season was observed. The transfer amounts in the rainy and dry seasons obtained from these results were 6.2 x 10(2) +/- 6.7 x 10(2) g h(-1) and 1.6 x 10(3) +/- 1.6 x 10(3) g h(-1), respectively, for filtered total mercury and 1.3 x 10(3) +/- 1.3 x 10(3) g h(-1) and 1.1 x 10(3) +/- 7 x 10(2) g h(-1), respectively, for particulate mercury. The temporal variations in these values exhibited a wide range, indicating the effects of weather conditions and of the mining process.

DOI： 10.1007/s12665-019-8727-9

Web of Science

Scopus
Yuriko Kono Hamada, Takashi Tomiyasu . The estimation of mercury exposure to workers through air deposition in the workshop of artisanal and small-scale gold mining . Journal of Environment and Safety10 ( 2 ) 137 - 142 2019.8The estimation of mercury exposure to workers through air deposition in the workshop of artisanal and small-scale gold miningReviewed

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Takashi Tomiyasu, Yuriko Kono Hamada, Hitoshi Kodamatani, Nuril Hidayati, Joeni Setijo Rahajoe . Transport of mercury species by river from artisanal and small-scale gold mining in West Java, Indonesia. . Environmental science and pollution research international26 ( 24 ) 25262 - 25274 2019.8Reviewed

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Authorship：Lead author,　Last author,　Corresponding author Publisher：SPRINGER HEIDELBERG

To estimate the impact of mercury discharged from artisanal and small-scale gold mining (ASGM) activity, variations in the concentrations of elemental mercury (Hg0), mercury ion (Hg2+), particulate mercury (P-Hg), and total mercury in filtered river water (FT-Hg) were investigated from sampling locations extending from 10 km upstream to 30 km downstream of ASGM operations in West Java, Indonesia. The average of the annual concentrations at the ASGM site from 2013 to 2017 were 0.14-0.85 μg L-1, 0.27-12.9 μg L-1, 4.3-49.5 μg L-1, and 1.2-12.5 μg L-1 for Hg0, Hg2+, P-Hg, and FT-Hg, respectively. The concentration of mercury species decreased as the distance from the ASGM site increased, while the ratio of P-Hg increased towards the lower reaches of the river system, with the percentage of P-Hg estimated at 90% of Hg at the sample location furthest downstream. A high mercury concentration of 600 mg kg-1 was observed for suspended particulate matter (SPM) at the ASGM site. The SPM maintained a high concentration of mercury, even in the downstream area. In the annual variations of the mercury species from 2013 to 2017, FT-Hg and P-Hg concentrations tended to decrease from 2016, which suggested a decline of ASGM activity in this area. However, SPM and river sediment showed no apparent changes in their mercury concentrations over this period, indicating that the contamination in the river system is persistent and does not recover quickly.

DOI： 10.1007/s11356-019-05718-6

Web of Science

Scopus

PubMed
Takashi Tomiyasu, Yuriko Kono Hamada, Hitoshi Kodamatani, Nuril Hidayati, Joeni Setijo Rahajoe . Transport of mercury species by river from artisanal and small-scale gold mining in West Java, Indonesia . Environmental Science and Pollution Research ( 26 ) 25262 - 25274 2019.6Transport of mercury species by river from artisanal and small-scale gold mining in West Java, IndonesiaReviewed

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Language：English Publishing type：Research paper (scientific journal)
Yuriko Hamada, Takashi Tomiyasu . Development of a system to reduce the volume of mercury containing waste water from laboratories . 8 ( 1 ) 17 - 23 2017.3Development of a system to reduce the volume of mercury containing waste water from laboratoriesReviewed

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Language：Japanese Publishing type：Research paper (scientific journal)
Takashi Tomiyasu, Hitoshi Kodamatani, Yuriko Kono Hamada, Akito Matsuyama, Ryusuke Imura, Yoko Taniguchi, Nuril Hidayati, Joeni Setijo Rahajoe . Distribution of total mercury and methylmercury around the small-scale gold mining area along the Cikaniki River, Bogor, Indonesia . Environmental Science and Pollution Research24 ( 3 ) 2643 - 2652 2017.1Distribution of total mercury and methylmercury around the small-scale gold mining area along the Cikaniki River, Bogor, IndonesiaReviewed

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Language：English Publishing type：Research paper (scientific journal)
Takashi Tomiyasu, Hitoshi Kodamatani, Yuriko Kono Hamada, Akito Matsuyama, Ryusuke Imura, Yoko Taniguchi, Nuril Hidayati, Joeni Setijo Rahajoe . Distribution of total mercury and methylmercury around the small-scale gold mining area along the Cikaniki River, Bogor, Indonesia. . Environmental science and pollution research international24 ( 3 ) 2643 - 2652 2017.1Reviewed

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Authorship：Lead author,　Last author,　Corresponding author Publisher：SPRINGER HEIDELBERG

This study investigates the distribution of total mercury (T-Hg) and methylmercury (MeHg) in the soil and water around the artisanal and small-scale gold mining (ASGM) area along the Cikaniki River, West Java, Indonesia. The concentration of T-Hg and MeHg in the forest soil ranged from 0.07 to 16.7 mg kg-1 and from <0.07 to 2.0 μg kg-1, respectively, whereas it ranged from 0.40 to 24.9 mg kg-1 and from <0.07 to 56.3 μg kg-1, respectively, in the paddy field soil. In the vertical variation of the T-Hg of forest soil, the highest values were observed at the soil surface, and these values were found to decrease with increasing depth. A similar variation was observed for MeHg and total organic carbon content (TOC), and a linear relationship was observed between them. Mercury deposited on the soil surface can be trapped and retained by organic matter and subjected to methylation. The slope of the line obtained for the T-Hg vs. TOC plot became larger near the ASGM villages, implying a higher rate of mercury deposition in these areas. In contrast, the plots of MeHg vs. TOC fell along the same trend line regardless of the distance from the ASGM village. Organic carbon content may be a predominant factor in controlling MeHg formation in forest soils. The T-Hg concentration in the river water ranged from 0.40 to 9.6 μg L-1. River water used for irrigation can prove to be a source of mercury for the paddy fields. The concentrations of Hg0 and Hg2+ in river water showed similar variations as that observed for the T-Hg concentration. The highest Hg0 concentration of 3.2 μg L-1 can be attributed to the waste inflow from work sites. The presence of Hg0 in river water can become a source of mercury present in the atmosphere along the river. MeHg concentration in the river water was found to be 0.004-0.14% of T-Hg concentration, which was considerably lower than the concentrations of other Hg species. However, MeHg comprised approximately 0.2% of the T-Hg in paddy field soil. Mercury deposited from the atmosphere and the river water can be subjected to methylation. Paddy fields are very important ecosystems; therefore, the effect of MeHg on these ecosystems and human beings should be further investigated.

DOI： 10.1007/s11356-016-7998-x

Web of Science

Scopus

PubMed
河野百合子、冨安卓滋 . 2010年から2012年における鹿児島市大気中水銀濃度変動 . 分析化学・公益社団法人日本分析化学会63 ( 1 ) 17 - 21 2014.22010年から2012年における鹿児島市大気中水銀濃度変動Reviewed

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Language：Japanese Publishing type：Research paper (scientific journal)
Yuriko Kono, Takashi Tomiyasu . Quantitative Evaluation of Real-time Measurements of Atmospheric Mercury in a Mercury- contaminated Area . Journal of Environment and Safety4 ( 2 ) 153 - 157 2013.5Quantitative Evaluation of Real-time Measurements of Atmospheric Mercury in a Mercury- contaminated AreaReviewed

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Yuriko Kono, Joeni S. Rahajoe, Nuril Hidayati, Hitoshi Kodamatani, Takashi Tomiyasu . Using native epiphytic ferns to estimate the atmospheric mercury levels in a small-scale gold mining area of West Java, Indonesia. . Chemosphere89 241 - 248 2012.4Using native epiphytic ferns to estimate the atmospheric mercury levels in a small-scale gold mining area of West Java, Indonesia.Reviewed

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Yuriko Kono, Takashi Tomiyasu . Biomonitoring of atmospheric mercury levels with the epiphytic fern Lepisorus thunbergianus (Polypodiaceae) . Chemosphere77 1387 - 1392 2009.9Biomonitoring of atmospheric mercury levels with the epiphytic fern Lepisorus thunbergianus (Polypodiaceae)Reviewed

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Junko Miyamoto, Yuriko kono, Takashi Tomiyasu and Ryusuke Imura . Measurement of Mercury Contents in Parmotrema tinctorum (Parmeliaceae) around Sakurajima Volcano, Kagoshima, Japan . Lichenology 7 ( 2 ) 143 - 151 2008.9Measurement of Mercury Contents in Parmotrema tinctorum (Parmeliaceae) around Sakurajima Volcano, Kagoshima, JapanReviewed

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MISC

水銀含有廃液減容化システムの基礎検討

濱田百合子, 冨安卓滋, 冨安卓滋

環境と安全(Web) 8 ( 1 ) 2017

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J-GLOBAL

Presentations

Y. Hamada and T. Tomiyau Advantages and disadvantages of on-demand methods for the delivery of short course lectures on experimental wastewater International conference

The 7th Asian Conference on Safety and Education in Laboratory 2020.12

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Event date： 2020.12

Presentation type：Poster presentation

Venue：Online
濱田百合子，冨安卓滋インドネシア水銀汚染地域におけるシマオオタニワタリAsplenium nidus L.の葉の水銀濃度変化

日本植物学会第84 回大会 2020.9

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Event date： 2020.9

Presentation type：Poster presentation

Venue：オンライン
Yuriko Hamada and Takashi Tomiyasu Water Quality Control of Wastewater from laboratories and Educational Effect International conference

The 5th Asian Conference on Safety and Education in Laboratory 2018.11

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Event date： 2018.11

Presentation type：Poster presentation

Venue：Okinawa, Japan
濱田百合子、冨安卓滋鹿児島大学における実験排水管理の取り組み

平成２９年第３５回大学等環境安全協議会総会・研修発表会 2017.7

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Event date： 2017.7

Presentation type：Oral presentation (general)

Venue：神戸大学
Yuriko Hamada, Joeni S. Rahajoe, Nuril Hidayati and Takashi Tomiyasu Biomonitoring of atmospheric mercury levels with the epiphytic fern Asplenium nidus complex in a small-scale gold mining area, Indonesia International conference

Plant Signaling & Behavior 2017 2017.6

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Event date： 2017.6

Presentation type：Poster presentation

Venue：Matsue, Japan
Yuriko Kono, Joeni Setijo Rahajoe, Nuril Hidayati and Takashi Tomiyasu Distribution of mercury in river water around artisanal and small-scale gold mining areas in West Java, Indonesia International conference

The 12th ICMGP, International Conference on Mercury as a Global Pollutant 2015.6

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Event date： 2015.6

Language：English Presentation type：Poster presentation

Venue：Jeju, Korea
河野百合子, Joeni S. Rahajoe, Nuril Hidayati , 冨安卓滋小規模金採掘活動によって排出される大気中水銀濃度の経時変化と化学形態別分析

日本分析化学会第75回分析化学討論会 2015.5

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Event date： 2015.5

Presentation type：Poster presentation

Venue：山梨大学（山梨県甲府市）
Yuriko Kono, Joeni S. Rahajoe, Nuril Hidayati, Takashi Tomiyasu Speciation and distribution of atmospheric mercury in artisanal and small-scale gold mining areas in West Java, Indonesia International conference

The 17th International Conference on Heavy Metals in the Environment The 17th International Conference on Heavy Metals in the Environment

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Event date： 2014.9

Language：English

Venue：中国

国際学会
Yuriko Kono, Joeni S. Rahajoe, Nuril Hidayati, Hitoshi Kodamatani, Takashi Tomiyasu Distribution of dissolved mercury in river water around artisanal and small-scale gold mining areas in West Java, Indonesia International conference

the 11th International Conference on Mercury as a Global Pollutant the 11th International Conference on Mercury as a Global Pollutant

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Event date： 2013.7

Language：English

Venue：イギリス

国際学会
Yuriko Kono, Joeni S. Rahajoe, Nuril Hidayati, Ryo Kanzaki, Hitoshi Kodamatani, Takashi Tomiyasu On-site measurements of atmospheric mercury around a small-scale gold mining area along the Cikaniki River, Indonesia International conference

Society of Environmental Toxicology and Chemistry Asia Pacific Annual Meeting (SETAC AP 2012) Society of Environmental Toxicology and Chemistry Asia Pacific Annual Meeting (SETAC AP 2012)

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Event date： 2012.9

Language：English

Venue：熊本

国際学会
河野百合子、Rahajioe S. Joeni、児玉谷仁、神埼亮、冨安卓滋インドネシア共和国グヌン・ハリムン―サラク国立公園における大気中水銀濃度変動

日本分析化学会第61年会日本分析化学会第61年会

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Event date： 2012.9

Language：Japanese

Venue：石川

国内学会
河野百合子，児玉谷仁，神崎亮，冨安卓滋鹿児島市における大気中水銀濃度変動

日本分析化学会第60年会日本分析化学会第60年会

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Event date： 2011.9

Language：Japanese

Venue：愛知

国内学会
KONO Yuriko, HIDAYATI Nuril, RAHAJOE Joeni S., KODAMATANI Hitoshi, KANZAKI Ryo, TOMIYASU Takashi Estimation of atmospheric mercury levels with native epiphytic ferns in small-scale gold mining area, West Java, Indonesia International conference

the 10th International Conference on Mercury as a Global Pollutant the 10th International Conference on Mercury as a Global Pollutant

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Event date： 2011.7

Language：English

Venue：カナダ

国際学会
河野百合子，Joeni S. Rahajoe，児玉谷仁，神崎亮，冨安卓滋インドネシアの小規模金採掘集落内および天然林内における大気中水銀濃度の経時変化

日本分析化学会第59年会日本分析化学会第59年会

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Event date： 2010.9

Language：Japanese

Venue：宮城

国内学会
河野百合子、Joeni Setijo Rahajoe、Nuril Hidayati、児玉谷仁、神崎亮、冨安卓滋インドネシアジャワ島西部の小規模金採掘地域におけるシマオオタニワタリを用いた大気中水銀のバイオモニタリング

第71回分析化学討論会第71回分析化学討論会

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Event date： 2010.5

Language：Japanese

Venue：島根

国内学会

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Awards

技術賞

2019.7 大学等環境安全協議会

Research Projects

大学等における排水管理と排水事故時の対応に関する調査

2020.9 - 2022.3

大学等環境安全協議会実務者連絡会大学等環境安全協議会実務者連絡会プロジェクト

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Authorship：Coinvestigator(s)
実験排水からの微量有害物質の除去と排水事故時の対応強化

2020.7 - 2023.3

大学等環境安全協議会大学等環境安全協議会プロジェクト

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Authorship：Principal investigator