Analysis of historical trend of pollution sources of lead in Tokyo Bay based on lead isotope ratios in sediment core

Sakata, Masahiro; Xu, Hao; Mashio, Asami S.

doi:10.1007/s10872-017-0448-7

Cited by 9 publications

(5 citation statements)

References 35 publications

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“…This suggests that the present pollution level of Zn has been maintained in Tokyo Bay over a long time, which may be a reason why the Zn concentration in the surface layer (2001)(2002)(2003) of the core is still significantly higher than the background concentration. A similar result showing that contaminated river bottom sediments are the principal pollution sources in Tokyo Bay has been obtained for Pb pollution (Sakata et al, 2018). Thus, dredging channels may be an effective countermea-…”

Section: Resultssupporting

confidence: 74%

“…In this study, we evaluated the pollution sources of Zn in Tokyo Bay ( Figure 1), Japan, on the basis of δ 66 Zn in a sediment core. It should be noted that the historical trend of pollution sources of Pb in Tokyo Bay was already investigated on the basis of Pb isotope ratios in the same core (Sakata et al, 2018). Tokyo Bay has an area of 960 km 2 and a mean depth of 15 m. The bay is surrounded by a densely populated (approximately 26 million) and highly industrialized area.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Pollution Sources of Zinc in Tokyo Bay Based on Zinc Isotope Ratio in Sediment Core

Sakata¹,

Okuizumi²,

Mashio³

et al. 2019

GEP

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This study evaluated the sources of Zn pollution in Tokyo Bay, Japan, on the basis of δ 66 Zn in a sediment core. The Zn concentration in sediments in the 1980s-2000s was considerably higher than the background concentration, suggesting that there remain important sources of Zn in the bay. The δ 66 Zn (+0.51‰) of anthropogenic Zn estimated in the core was significantly higher than those (approximately-0.1‰-+0.2‰) of treated water from sewage treatment plants and vehicle-related sources. A large number of electroplating plants are located in Tokyo areas. It is assumed that Zn in effluents from electroplating operations is isotopically heavier owing to a negative isotopic effect on Zn electroplating. This tends to support the hypothesis that river bottom sediments, which were contaminated with Zn in the untreated effluents from electroplating plants in the past, are the principal sources of anthropogenic Zn in Tokyo Bay in the 1980s-2000s.

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Section: Resultssupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Evaluation of Pollution Sources of Zinc in Tokyo Bay Based on Zinc Isotope Ratio in Sediment Core

Sakata¹,

Okuizumi²,

Mashio³

et al. 2019

GEP

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“…7 started clearly in coincidence with the pollution peak of the 1930–1940 and carried on further with a minimum in the 1980s and a slight recover later on. According to the literature this particular ratio is higher in natural soils, while it decreases because of anthropogenic pollution (Renberg et al 2002 ; Sakata et al 2018 ; Chiaradia et al 1997 ; Bränvall et al 2001 ). Moreover, a three-isotope plot can often help identifying and differentiating between anthropogenic and natural/geogenic Pb sources, particularly when the naturally occurring and anthropogenically introduced Pb has significantly different isotope ratios (Townsend and Seen 2012 ).…”

Section: Resultsmentioning

confidence: 98%

Sources and trends of trace elements and polycyclic aromatic hydrocarbons in a shallow lake in the Mediterranean area from sediment archives of the Anthropocene

Gravina

Sebastiani

Bruschi

et al. 2022

Environ Sci Pollut Res

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In this study, the anthropogenic contamination in Trasimeno lake (Central Italy) was investigated using three sediment cores spanning over the last 150 years (Anthropocene) to identify the primary sources of pollution and quantify the level of contaminant enrichment in the basin. First, based on the relative cumulative frequency and linear regression methods, we obtained a geochemical baseline for the lake using the deeper parts of the sediment cores. The geochemical baseline allowed us to determine the values of trace elements enrichment factors. On this knowledge, as a second result, we were able to reconstruct the natural sources and the anthropogenic impact on the lake with a biennial resolution. This goal has been obtained by combining different inorganic and organic chemical proxies such as trace elements, polycyclic aromatic hydrocarbons, and lead isotope ratios and exploiting both principal component and factor analysis to associate chemical proxies to human-driven contamination processes. Five different groups of elements have been identified, one of which is of natural origin and four of anthropogenic origin. In particular, it was possible to identify the times and impacts of the industrial activities during the Second World War, which dispersed heavy metals in sediments. Moreover, we found evidence of the recent human activities that have characterized the surroundings of the basin, such as Pb inputs related to the use of gasoline and the enrichment of certain elements generally used in agricultural activities (such as P, Cu, and Mn) due to the development of this sector in the last 40 years.

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“…The rise in Pb pollution observed in Greenland ice has tracked the rapid expansion of coal consumption in Europe and North America in the late 19th century . Japan released considerable amounts of Pb in the 1900s due to the use of domestic and imported ores (Canada and Australia) in Pb smelting, as well as the consumption of leaded gasoline. ,, Notably, all leaded gasoline used in Japan was imported from the United States and the United Kingdom . The tetraethyl Pb was added to 90% of gasoline in the United States by 1936, and the use of Pb (mainly tetraethyl Pb) as gasoline additives contributed to the increase in Pb pollution in Japan since the 1920s.…”

Section: Resultsmentioning

confidence: 99%

“…Zn isotope analysis was also carried out on the MC-ICP-MS using wet plasma and the sample-standard bracketing (SSB) method. 50 The Zn isotope compositions of the samples were reported relative to the standard Institute of Reference Materials and Measurement (IRMM)-3702 using δ notation based on the 66 Zn/ 64 Zn ratio expressed as δ 66 Zn IRMM = [( 66 Zn/ 64 Zn) sample /( 66 Zn/ 64 Zn) IRMM − 1] × 1000. The total procedural blanks (from sample dissolution to mass spectrometry) were routinely measured and had a long-term average of less than 2% for Zn, which is considered neglected during mass spectrometry.…”

Section: Metal Concentration Analysesmentioning

confidence: 99%

Lake Sediment Archive Reveals a Distinct Response to Anthropogenic Pb and Zn Deposition with Historical Periods: Pb–Zn Isotope Evidence

Xia,

Liu,

Liu

et al. 2023

Environ. Sci. Technol.

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Anthropogenic activities release large quantities of heavy metals into the atmosphere. In China, the input of these heavy metals through local and trans-boundary atmospheric deposition is poorly understood. To assess this issue, herein, we use Pb and Zn isotopes to constrain the sources of Pb and Zn in a 210Pb-dated sediment core collected from the enclosed lake in South China. We observed a progressive shift toward higher 208Pb/206Pb and Pb fluxes (0.79–4.02 μg·cm–2·a–1) from 1850 to 1950 and a consistent decrease in δ66ZnIRMM (as low as −0.097 ± 0.030‰) coupled with an increase in Pb (1.74–3.36 μg·cm–2·a–1) and Zn (8.07–10.44 μg·cm–2·a–1) fluxes after 1980. These distinguished isotopic signals and flux variations reveal the presence of trans-boundary Pb since 1900, with the addition of local industrial Pb and Zn pollution after 1980. Up to 72.3% of Pb deposited at our site can be attributed to long-distance transportation from previously industrialized countries, resulting in a noteworthy legacy of Pb in China since 1900. Despite the phasing out of leaded gasoline, Chinese gasoline still contributes an average of 20.9%. The contribution of China’s mining and smelting activities to Pb has increased steadily since 1980 and remained stable at an average of 25.1% since 2000.

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Analysis of historical trend of pollution sources of lead in Tokyo Bay based on lead isotope ratios in sediment core

Cited by 9 publications

References 35 publications

Evaluation of Pollution Sources of Zinc in Tokyo Bay Based on Zinc Isotope Ratio in Sediment Core

Evaluation of Pollution Sources of Zinc in Tokyo Bay Based on Zinc Isotope Ratio in Sediment Core

Sources and trends of trace elements and polycyclic aromatic hydrocarbons in a shallow lake in the Mediterranean area from sediment archives of the Anthropocene

Lake Sediment Archive Reveals a Distinct Response to Anthropogenic Pb and Zn Deposition with Historical Periods: Pb–Zn Isotope Evidence

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