Volcanic influence on mercury in soils of kagoshima, Southern Kyushu, Japan

Gotoh, Shigeyoshi; Otsuka, Hiroo; Koga, Hiroshi

doi:10.1080/00380768.1979.10433194

Cited by 11 publications

(3 citation statements)

References 15 publications

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“…However, the associated parent rocks contained less than 10 ng g –1 Hg and so this will not significantly affect the total concentration of soil Hg. The paddy soils in Japan contain up to 245 ng g –1 Hg (Gotoh et al 1979) and the enrichment of Hg in soil profiles, particularly in paddy soils, is a result of Hg compounds applied in the past as agrochemicals.…”

Section: Resultsmentioning

confidence: 99%

Record of mercury pollution in sediments of lakes Nakaumi and Shinji in Japan

2001

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Two sediment core profiles from lakes Shinji and Nakaumi were studied in order to understand the level of mercury (Hg) pollution in lakes in northwestern Japan. The sedimentation rates were established on the basis of the activity of [210Pb] and [131Cs] in the sediments. In Lake Shinji, the highest level of Hg (130 ng g–1) in the sediment was found at a depth of 20–22 cm, while 195 ng g–1 was found at a depth of 10–12 cm in the core profiles from Lake Nakaumi. The relative increase in Hg concentration in lake sediments started after 1960 and significant contamination events occurred in the early 1960s. Mercury profiles in lake sediments from lakes Shinji and Nakaumi are found to reflect the anthropogenic Hg released into the environment in the 1950s and 1960s. A pronounced maximun concentration of Hg is found in both lakes, where sediment accumulation rates differ.

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Section: Resultsmentioning

confidence: 99%

Record of mercury pollution in sediments of lakes Nakaumi and Shinji in Japan

2001

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“…In surface soils, estimates of Hg content have varied widely from 3 to 4,600 μg g −1 (Steinns 1992). Many reports are available on Hg distribution, environmental pollution with Hg, and models of the rainfall–soil–atmosphere cycle of Hg in the environment (Gotoh et al. 1979; Iimura 1981; Iwasa et al.…”

Section: Introductionmentioning

confidence: 99%

Mercury distribution in tephra soil layers in Hokkaido, Japan, with reference to 34,000-year stratification

Hobara

Mizuno²,

Amano³

et al. 2009

Soil Science and Plant Nutrition

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Tephra from volcanic eruptions contains only small amounts of mercury (Hg) right after the eruption because the high temperature at eruption evaporates Hg in volcanic ash. Thus, accumulation of Hg in tephra soil layers during the dormant periods of the volcano may reflect Hg deposition while the layer was exposed to the atmosphere. To estimate sequential changes in Hg deposition, we measured the Hg content and accumulation in tephra layers from 6 sites in Hokkaido known to have many tephra layers derived from volcanic eruptions over a 34,000‐year period. Mercury content and accumulation rate in the soil profiles varied widely depending on the tephra. In each tephra layer, the Hg content and accumulation rates increased principally at the upper soil horizons and decreased at the lower depths. The Hg deposition rates calculated from the amount of Hg accumulated in the tephra layers were similar within the same tephra. These characteristics of Hg distribution indicate that Hg deposition accumulated on the surface of each tephra layer during the period the tephra layer was exposed to the atmosphere. Although physicochemical processes such as leaching out, wind erosion, and volatilization might lead to over‐ and/or underestimation of the deposition rates, our estimated amounts of Hg were markedly higher in the tephra soils after 1,600 year BP than before that time. The results of this study suggest that tephra layers in Hokkaido offer important implications for understanding of the historical changes in atmospheric Hg deposition.

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“…In Japan, although contamination of environmental media by Hg has been known for a considerable time (Ui & Kitamura 1971;Nose 1977;Gotoh et al 1977Gotoh et al , 1978Gotoh et al , 1979, there is still insufficient information on Hg geochemistry in Accepted for publication 24 October 1996.…”

Section: Introductionmentioning

confidence: 99%

Geochemistry of mercury in sediments from Lake Biwa in Japan

Chandrajith

Okumura

1996

Lakes & Reservoirs

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Three core samples from Lake Biwa, Japan, were analysed for mercury (Hg) and other heavy metals (iron, manganese, zinc, copper, lead, nickel, chromium, cobalt). The concentration of Hg in the core samples investigated varied from 106 to 222 ng/g. The sedimentary records of the lake indicate that the anthropogenic input of Hg parallels the increasing intensity of cultural activities in the lake basin. The maximum anthropogenic input could be identified for Hg during the mid-1960s. The geochemical data of the lake sediments are used to evaluate the behaviour of Hg with other trace metals.

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Volcanic influence on mercury in soils of kagoshima, Southern Kyushu, Japan

Cited by 11 publications

References 15 publications

Record of mercury pollution in sediments of lakes Nakaumi and Shinji in Japan

Record of mercury pollution in sediments of lakes Nakaumi and Shinji in Japan

Mercury distribution in tephra soil layers in Hokkaido, Japan, with reference to 34,000-year stratification

Geochemistry of mercury in sediments from Lake Biwa in Japan

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