Human influence on the Hg pollution in Lake Jinzai, Japan

Chandrajith, Rohana; Okumura, Minoru; Hashitani, Hiroshi

doi:10.1016/0883-2927(94)00042-5

Cited by 23 publications

(18 citation statements)

References 13 publications

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“…7d) were observed in Nakaumi and the Honjo area, suggesting that Zn and Cu have similar behavior to Fe in the sedimentary processes. These metals were thus most probably adsorbed onto Fe oxide or sulfide (Fe phase)-coated grains in the sediments, as proposed by other studies (e.g., Chandrajith et al 1995) of lake sediments in southwest Japan. However, the high organic carbon contents of the Nakaumi-Honjo sediments (Sampei et al 1997;Kurakado et al 1998) are also likely to be a significant factor in Cu and Zn enrichment.…”

Section: Sources Of Metals In the Sedimentsmentioning

confidence: 83%

“…Intensive use and discharge of Cu can lead to the widespread accumulation of Cu in sediments where it often remains in surface layers. Enrichment of Zn and Cu concentrations (226 and 41 ppm) near the sediment-water interface in Lake Jinzai in Shimane prefecture has been linked to human activity, especially heavy use of agrochemicals (Chandrajith et al 1995). Significant positive correlations between Fe 2 O 3 and Zn (r 2 = 0.80, p < 0.0001, n = 59; Fig.…”

Section: Sources Of Metals In the Sedimentsmentioning

confidence: 94%

“…7a) in the bottom samples, also suggesting an association with authigenic Fe oxides coatings in the sediments. Chandrajith et al (1995) and Ishiga et al (2000b) noted that Pb concentrations in the bottom sediments of Lake Jinzai and Lake Jaike in Shimane prefecture were associated with Fe-bearing phases, most probably Fe oxides, oxyhydroxides, and sulfides, depending on the existing oxidation-reduction conditions. Ortiz and Roser (2006a) found that abundances of Pb in Kando River sediments in Shimane were not prone to major disturbances from anthropogenic sources, and there was thus no clear evidence of influence from human activity.…”

Section: Sources Of Metals In the Sedimentsmentioning

confidence: 96%

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Abundances, distribution, and sources of trace metals in Nakaumi–Honjo coastal lagoon sediments, Japan

Ahmed

Bibi

Seto

et al. 2009

Environ Monit Assess

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Bottom sediments from Nakaumi Lagoon and the Honjo Area in southwest Japan were analyzed to determine their geochemical compositions and to assess potential impacts by comparison with sediment quality guidelines. Present-day water quality was also assessed. Results showed that the water quality of Nakaumi Lagoon and the Honjo area contrasts between their upper and lower parts. Average abundances of As, Pb, Zn, Cu, Ni, and Cr in the Nakaumi sediments were 12, 25, 135, 32, 21, and 46 ppm, respectively, compared to 10, 24, 110, 26, 20, and 38 ppm in the Honjo area. All averages are greater than those of the upper continental crust. The elevated metal concentrations are probably related to the fine-grained nature of the sediments, reducing bottom conditions produced by abundant organic matter and possibly minor non-point anthropogenic sources. Trace metal contents are strongly correlated with Fe2O3, suggesting that Fe oxides play a role in controlling abundances. Metal concentrations exceed the NYSDEC lowest effect level and CCME interim sediment quality guidelines that indicate moderate impact on aquatic organisms. Average abundances of As and Zn are comparable to the Coastal Ocean Sediment Database threshold, whereas maximum concentrations exceed that value, indicating that the concentrations of these metals are potentially toxic. These enrichments suggest that regular monitoring may be desirable even where no point sources of metal pollution exist.

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Section: Sources Of Metals In the Sedimentsmentioning

confidence: 83%

Section: Sources Of Metals In the Sedimentsmentioning

confidence: 94%

Section: Sources Of Metals In the Sedimentsmentioning

confidence: 96%

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Abundances, distribution, and sources of trace metals in Nakaumi–Honjo coastal lagoon sediments, Japan

Ahmed

Bibi

Seto

et al. 2009

Environ Monit Assess

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“…Elevated concentrations of toxic metals in the environment have detrimental effects on chemical and biological properties of soil (Lothenbach et al 1999) and can eventually harm plants and human health via the food chain (Chandrajith et al 1995;Chen et al 2000a, b;Ok et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Ameliorants to immobilize Cd in rice paddy soils contaminated by abandoned metal mines in Korea

Kim

et al. 2010

Environ Geochem Health

140

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The cadmium (Cd) content of rice grain grown in metal-contaminated paddy soils near abandoned metal mines in South Korea was found to exceed safety guidelines (0.2 mg Cd kg⁻¹) set by the Korea Food and Drug Administration (KFDA). However, current remediation technologies for heavy metal-contaminated soils have limited application with respect to rice paddy soils. Laboratory and greenhouse experiments were conducted to assess the effects of amending contaminated rice paddy soils with zerovalent iron (ZVI), lime, humus, compost, and combinations of these compounds to immobilize Cd and inhibit Cd translocation to rice grain. Sequential extraction analysis revealed that treatment with the ameliorants induced a 50-90% decrease in the bioavailable Cd fractions when compared to the untreated control soil. When compared to the control, Cd uptake by rice was decreased in response to treatment with ZVI + humus (69%), lime (65%), ZVI + compost (61%), compost (46%), ZVI (42%), and humus (14%). In addition, ameliorants did not influence rice yield when compared to that of the control. Overall, the results of this study indicated that remediation technologies using ameliorants effectively reduce Cd bioavailability and uptake in contaminated rice paddy soils.

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“…Lake sediments from the industrialized areas and densely urbanized regions, as well as from the rural unpolluted areas, have been extensively researched in the recent years, since they act both as a sink and a source of metals in the aquatic ecosystems. Previous studies have suggested that the anthropogenic inputs of metals could be significant in recently deposited sediments in addition to the natural enrichment of metals in the aquatic systems (Chandrajith et al 1995). In Sri Lanka, except for few coastal lakes, natural inland lakes are not available.…”

Section: Introductionmentioning

confidence: 99%

Geochemical characteristics of sediments from a reservoir (tank) ecosystem in Sri Lanka

Chandrajith

Mahatantila

Jayasena

et al. 2008

Paddy Water Environ

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Major, trace and selected high field strength element geochemistry of fresh-water sediments from the Malagane tank, Deduru Oya basin, Sri Lanka, has been investigated in this study. Sediment samples were collected from 13 locations and analyzed for their elemental distribution using the X-ray fluorescence technique. The sediments were characterized by relatively low organic matter, ranging from 4.8 to 16.9%. The elemental distributions were compared with those of the average upper continental curst, and it was found that, with a few exceptions, most of the studied elements are either comparable or depleted. Correlation and principal component analyses were applied to identify the relationships among studied elements. Major elements, most trace and light rare earth elemental distribution show strong positive correlation with Al 2 O 3 and TiO 2 , which indicate that the phyllosilicates and heavy minerals in the sediments are the probable hosts for these elements. The results also indicate that the sediments in the Malagane tank are representative of the materials from the metamorphic rocks in the watershed and were subjected to changes within the tank ecosystem. The results obtained from this study are vital for future pollution management of tank ecosystems in Sri Lanka, since information on elemental distribution within the sediments of tank ecosystem is lacking.

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Human influence on the Hg pollution in Lake Jinzai, Japan

Cited by 23 publications

References 13 publications

Abundances, distribution, and sources of trace metals in Nakaumi–Honjo coastal lagoon sediments, Japan

Abundances, distribution, and sources of trace metals in Nakaumi–Honjo coastal lagoon sediments, Japan

Ameliorants to immobilize Cd in rice paddy soils contaminated by abandoned metal mines in Korea

Geochemical characteristics of sediments from a reservoir (tank) ecosystem in Sri Lanka

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