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Characteristics of heavy metals and Pb isotopic composition in sediments collected from the tributaries in three Gorges Reservoir, China.

Gao B, Zhou H, Huang Y, Wang Y, Gao J, Liu X - ScientificWorldJournal (2014)

Bottom Line: Pb isotopic compositions in sediments were also measured to effectively identify the potential Pb sources.The results showed that the average concentrations of heavy metals in sediment of TGR tributaries were higher than the local background values of soils and sediments in China.All Pb isotopic ratios in sediments were similar to those from coal combustion, lead ores (the mining activities and smelting process), and cement material, indicating that these anthropogenic inputs may be the main sources for Pb pollution in sediments of TGR tributaries.

View Article: PubMed Central - PubMed

Affiliation: Department of Water Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, China ; State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China.

ABSTRACT
The concentrations, distribution, accumulation, and potential ecological risk of heavy metals (Cr, Cu, Zn, Ni, As, Pb, Cd, and Hg) in sediments from the Three Gorges Reservoir (TGR) tributaries were determined and studied. Pb isotopic compositions in sediments were also measured to effectively identify the potential Pb sources. The results showed that the average concentrations of heavy metals in sediment of TGR tributaries were higher than the local background values of soils and sediments in China. The assessment by Geoaccumulation Index indicated that Cu, Ni, and Hg were at the "slightly polluted" level and Cd was ranked as the "moderately polluted" level in tributary sediments of TGR. The assessment by Potential Ecological Risk Index showed that Hg and Cd were the predominant elements in tributary sediments in TGR. The Pb isotopic ratios in sediments varied from 1.171 to 1.202 for (206)Pb/(207)Pb and from 2.459 to 2.482 for (208)Pb/(207)Pb in TGR. All Pb isotopic ratios in sediments were similar to those from coal combustion, lead ores (the mining activities and smelting process), and cement material, indicating that these anthropogenic inputs may be the main sources for Pb pollution in sediments of TGR tributaries.

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Map of the study area and sampling sites in TGR.
© Copyright Policy - open-access
Related In: Results  -  Collection


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fig1: Map of the study area and sampling sites in TGR.

Mentions: The tributary sediments were collected from the TGR, China. A map of the sampling locations is shown in Figure 1. The TGR area is located in China, west of Hubei and east of Chongqing city (28°32′–31°44′N and 105°44′–111°39′E), covering an overall area of 58,000 km2 and including totally 20 districts and counties (cities). TGR is the largest hydroelectric project ever built in China, as well as in the world. After the Three Gorges Dam was constructed at Sandouping, a large dam formed in the upstream direction of the Yangtze River, with the length of over 600 km. The reservoir waters and their fringe areas are generally called the TGR area of the Yangtze River.


Characteristics of heavy metals and Pb isotopic composition in sediments collected from the tributaries in three Gorges Reservoir, China.

Gao B, Zhou H, Huang Y, Wang Y, Gao J, Liu X - ScientificWorldJournal (2014)

Map of the study area and sampling sites in TGR.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3927837&req=5

fig1: Map of the study area and sampling sites in TGR.
Mentions: The tributary sediments were collected from the TGR, China. A map of the sampling locations is shown in Figure 1. The TGR area is located in China, west of Hubei and east of Chongqing city (28°32′–31°44′N and 105°44′–111°39′E), covering an overall area of 58,000 km2 and including totally 20 districts and counties (cities). TGR is the largest hydroelectric project ever built in China, as well as in the world. After the Three Gorges Dam was constructed at Sandouping, a large dam formed in the upstream direction of the Yangtze River, with the length of over 600 km. The reservoir waters and their fringe areas are generally called the TGR area of the Yangtze River.

Bottom Line: Pb isotopic compositions in sediments were also measured to effectively identify the potential Pb sources.The results showed that the average concentrations of heavy metals in sediment of TGR tributaries were higher than the local background values of soils and sediments in China.All Pb isotopic ratios in sediments were similar to those from coal combustion, lead ores (the mining activities and smelting process), and cement material, indicating that these anthropogenic inputs may be the main sources for Pb pollution in sediments of TGR tributaries.

View Article: PubMed Central - PubMed

Affiliation: Department of Water Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, China ; State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China.

ABSTRACT
The concentrations, distribution, accumulation, and potential ecological risk of heavy metals (Cr, Cu, Zn, Ni, As, Pb, Cd, and Hg) in sediments from the Three Gorges Reservoir (TGR) tributaries were determined and studied. Pb isotopic compositions in sediments were also measured to effectively identify the potential Pb sources. The results showed that the average concentrations of heavy metals in sediment of TGR tributaries were higher than the local background values of soils and sediments in China. The assessment by Geoaccumulation Index indicated that Cu, Ni, and Hg were at the "slightly polluted" level and Cd was ranked as the "moderately polluted" level in tributary sediments of TGR. The assessment by Potential Ecological Risk Index showed that Hg and Cd were the predominant elements in tributary sediments in TGR. The Pb isotopic ratios in sediments varied from 1.171 to 1.202 for (206)Pb/(207)Pb and from 2.459 to 2.482 for (208)Pb/(207)Pb in TGR. All Pb isotopic ratios in sediments were similar to those from coal combustion, lead ores (the mining activities and smelting process), and cement material, indicating that these anthropogenic inputs may be the main sources for Pb pollution in sediments of TGR tributaries.

Show MeSH