ELEMENTAL COMPOSITION OF SUSPENDED SEDIMENTS FROM THE CHANGJIANG RIVER AND ITS ENVIRONMENTAL IMPLICATION

ZENG Chen; YANG Shouye; WANG Lei; WANG Hao; LIU Xiaoli

doi:10.3724/SP.J.1140.2012.01019

2012 Vol. 32, No. 1

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Article navigation > Marine Geology & Quaternary Geology > 2012 > 32(1): 19-25

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ZENG Chen, YANG Shouye, WANG Lei, WANG Hao, LIU Xiaoli. ELEMENTAL COMPOSITION OF SUSPENDED SEDIMENTS FROM THE CHANGJIANG RIVER AND ITS ENVIRONMENTAL IMPLICATION[J]. Marine Geology & Quaternary Geology, 2012, 32(1): 19-25. doi: 10.3724/SP.J.1140.2012.01019

Citation:

ZENG Chen, YANG Shouye, WANG Lei, WANG Hao, LIU Xiaoli. ELEMENTAL COMPOSITION OF SUSPENDED SEDIMENTS FROM THE CHANGJIANG RIVER AND ITS ENVIRONMENTAL IMPLICATION[J]. Marine Geology & Quaternary Geology, 2012, 32(1): 19-25. doi: 10.3724/SP.J.1140.2012.01019

ELEMENTAL COMPOSITION OF SUSPENDED SEDIMENTS FROM THE CHANGJIANG RIVER AND ITS ENVIRONMENTAL IMPLICATION

1 School of Ocean and Earth Sciences, Tongji University, Shanghai 200092;
2 State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092;
3 Key Laboratory of Water Environment in Yangtze River, MOE, Tongji University, Shanghai 200092

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Corresponding author: YANG Shouye, 教授

Received Date: 22 August 2011

Revised Date: 15 September 2011

Abstract

Abstract

The study on the concentrations of major elements in the suspended sediments collected from the Changjiang mainstream at Chongqing and the downstream areas reveals that element concentrations are different in the acid leached and residual fractions. The percentages of Ca and Mg are high in the leached fraction, while Al, Fe, K and Na are mainly concentrated in the residual fraction. The compositions of major elements show somewhat regional pattern of variations, primarily reflecting the controls of sources of the weathered materials, weathering intensity and hydrodynamics of the river. The distribution of heavy metals suggests that Pb, Zn, Co and Cu accumulate in the suspended sediments, probably due to the contamination of the river by intense human activities around the Three Gorges Reservoir and its downstream areas. The instability of hydrodynamic environment in the Three Gorges Reservoir leads to the compositional variation of heavy metals in vertical profiles.
- suspended sediment /
- Three Gorges Reservoir /
- phase of elements /
- human activity /
- Changjiang River

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References

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