Trend of trace metals in precipitation around Okinawa Island, Japan

Vuai, Said; Tokuyama, Akira

doi:10.1016/j.atmosres.2010.09.010

Cited by 31 publications

(15 citation statements)

References 21 publications

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“…본 조사는 충청남도 태안군에 위치한 태안군 농업기술센 터 (36ﾟ 43' 47'' 93 N, 126ﾟ, 18', 26'', 18 (Halstead et al, 2000;Chudaeva et al, 2006;Cheng et al, 2011;Vuai and Tokuyama, 2011).…”

Section: 빗물채취 및 분석unclassified

“…특히 연소 과정에서 배출되는 중금속류는 운반체가 소립자로 구성되어 상대적으로 용해도가 높아 강우에 쉽게 녹고, 낮은 pH에서는 강우오염을 가중시킨다 (Conko et al, 2004;García et al, 2006). 기존의 여러 연구자들이 강우의 중금속 부화와 관련하 여 오염상태의 상대적인 지수로써 지각의 조성을 근거한 부 화계수(Enrichment Factor, EFc) 값을 비교 검토하였다 (Hu et al, 2003;Jung et al, 2007;Vuai and Tokuyama, 2011). 강우 중 부화계수 값이 1~10은 지각의 원소조성 차이 에 의한 것으로 부화상태가 아니며, 10~100은 지각의 화학조 성보다 강우가 상대적으로 부화가 된 상태, 100 이상은 인간 활동에 의한 인위적인 오염이 심각한 고농도 부화상태로 정 의하고 있다 (Duce et al, 1975;Al-Momani, 2003).…”

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Wet Deposition of Heavy Metals during Farming Season in Taean, Korea

Jung¹,

Kim²,

Lee³

et al. 2011

Korean Journal of Environmental Agriculture

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METHODS AND RESULTS:The relationship between concentration of heavy metal and other chemical properties in the rainwaters was also evaluated. Chemical properties in the rainwater were various differences with raining periods and years. It appeared that a weighted average pH values of rainwater was ranged from 5.0 to 5.1. Heavy metal concentrations in the rainwater were ranked as Pb > Zn > Cu > Ni > As > Cr > Cd. As compared with heavy metal concentrations of rainwater in 2002, Cu, Pb, and Zn were higher than other elements in 2003. There were positive correlation between major ionic components, such as NH 4

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Section: 빗물채취 및 분석unclassified

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Wet Deposition of Heavy Metals during Farming Season in Taean, Korea

Jung¹,

Kim²,

Lee³

et al. 2011

Korean Journal of Environmental Agriculture

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“…12 in Baker et al, 2017). In terms of wet deposition, considering the close relationship between wet deposition and precipitation (Kryza et al, 2012;Wałaszek et al, 2013), evaluation of precipitation is performed using the Tropical Rainfall Measuring Mission (TRMM; http://pmm.nasa.gov/trmm, last access: 18 January 2019) and Global Precipitation Climatology Project (GPCP) v2.3 (Adler et al, 2018) precipitation data. Figure 1 shows a comparison of the annual mean precipitation over the historical period (2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010) among the ACCMIP multi-model ensemble mean, TRMM, which only covers 60 • N-60 • S, and GPCP.…”

Section: Evaluation Of the Accmip Resultsmentioning

confidence: 99%

Impacts of climate change and emissions on atmospheric oxidized nitrogen deposition over East Asia

et al. 2019

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A multi-model ensemble of Atmospheric Chemistry and Climate Model Intercomparison Project (ACCMIP) simulations is used to study the atmospheric oxidized nitrogen (NO y ) deposition over East Asia under climate and emission changes projected for the future. Both dry and wet NO y deposition show significant decreases in the 2100s under RCP4.5 and RCP8.5, primarily due to large anthropogenic emission reduction over both land and sea. However, in the near future of the 2030s, both dry and wet NO y deposition increase significantly due to continued increase in emissions. Marine primary production from both dry and wet NO y deposition increases by 19 %-34 % in the 2030s and decreases by 34 %-63 % in the 2100s over the East China Sea. The individual effect of climate or emission changes on dry and wet NO y deposition is also investigated. The impact of climate change on dry NO y deposition is relatively minor, but the effect on wet deposition, primarily caused by changes in precipitation, is much higher. For example, over the East China Sea, wet NO y deposition increases significantly in summer due to climate change by the end of this century under RCP8.5, which may subsequently enhance marine pri-mary production. Over the coastal seas of China, as the transport of NO y from land becomes weaker due to the decrease in anthropogenic emissions, the effect of ship emissions and lightning emissions becomes more important. On average, the seasonal mean contribution of ship emissions to total NO y deposition is projected to be enhanced by 24 %-48 % and 3 %-37 % over the Yellow Sea and East China Sea, respectively, by the end of this century. Therefore, continued control of both anthropogenic emissions over land and ship emissions may reduce NO y deposition to the Chinese coastal seas.

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“…Okinawa Island has been of interest to many geochemical studies over the past years (eg. Ohde et al, 2004;Naumih & Oomori, 2006;Vuai & Tokuyama, 2011). Although most of these studies have focused on trace metal pollution, investigations in the north-eastern part of Okinawa have been limited, particularly in the foreshore and mangrove environments.…”

Section: Introductionmentioning

confidence: 99%

Geochemical Distribution, Enrichment, and Potential Toxicity of Trace Metals in the Surface Sediments of Okinawa Mangrove, Southwest Japan

Diallo

Ishiga²

2016

ENRR

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Surface sediments along the coast of Okinawa Island were analyzed to determine their geochemical compositions, and to assess sediment quality and the potential for ecological harm, based on comparison with established international sediment quality guidelines. The Contamination factor (CF) and the geoaccumualtion index (Igeo) of As, Pb, Zn, Cu, Ni, and Cr were computed to determine the pollution status of the mangrove and foreshore sediments. The lowest effect level (LEL) and the severe effect level (SEL) established by the New York State Department of Environmental Conservation (NYSDEC), and the threshold effect level (TEL) value and the probable effect level (PEL) developed by the Canadian Council of Ministers of the Environment (CCME) were the benchmarks applied to assess the potential for ecological harm. Among the sampling set, the highest average concentration of Pb (22 mg/kg), Zn (82 mg/kg), Ni (26 mg/kg), and Cr (81 mg/kg) occurred in the Ohura mangrove sediments, that of As (17 mg/kg) in the Gesashi mangrove, and that of Cu (22 mg/kg) in the suspended solids. The loss on ignition values of the foreshore sediments (20.32%) are nearly two and three times greater than that of the Gesashi mangrove and the Ohura mangrove, respectively. On average, the CFs of As, Pb, Zn, Cu, Ni, and Cr in the suspended solids, those of Pb, Zn, Cu, Ni, and Cr in the Gesashi mangrove and foreshore sediments, and those of Ni and Cr in the Ohura mangrove display low contamination (CF≤1), whereas the average CF of As in the three sampling areas show moderate enrichment (CF:1-3). The average Igeo values indicate that among the selected trace metals, only As in the Gesashi and Ohura mangroves show significant values, but even these are rated as unpolluted to moderately polluted (Igeo:0-1). The average concentrations of As in the Gesashi and Ohura mangroves and the foreshore sediments exceed both the LEL and TEL, but fall below the SEL and PEL, suggesting that this metal may moderately impact biota health. This is also the case for Cu and Ni in the Ohura mangrove and the suspended solids, and for Cr in the Ohura mangrove.

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Trend of trace metals in precipitation around Okinawa Island, Japan

Cited by 31 publications

References 21 publications

Wet Deposition of Heavy Metals during Farming Season in Taean, Korea

Wet Deposition of Heavy Metals during Farming Season in Taean, Korea

Impacts of climate change and emissions on atmospheric oxidized nitrogen deposition over East Asia

Geochemical Distribution, Enrichment, and Potential Toxicity of Trace Metals in the Surface Sediments of Okinawa Mangrove, Southwest Japan

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