SPATIAL ACCUMULATION FEATURES AND ENVIRONMENT EFFICIENCY OF HEAVY METALS IN INTRA-TIDAL SURFACE SEDIMENTS OF GUANHE ESTUARY, NORTHERN JIANGSU

HUANG Jia-xiang; YIN Yong; XU Jun; ZHU Xiao-bing

Marine Geology & Quaternary Geology > 2007 > 27(5): 23-32.

HUANG Jia-xiang, YIN Yong, XU Jun, ZHU Xiao-bing. SPATIAL ACCUMULATION FEATURES AND ENVIRONMENT EFFICIENCY OF HEAVY METALS IN INTRA-TIDAL SURFACE SEDIMENTS OF GUANHE ESTUARY, NORTHERN JIANGSU[J]. Marine Geology & Quaternary Geology, 2007, 27(5): 23-32.

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SPATIAL ACCUMULATION FEATURES AND ENVIRONMENT EFFICIENCY OF HEAVY METALS IN INTRA-TIDAL SURFACE SEDIMENTS OF GUANHE ESTUARY, NORTHERN JIANGSU

1 Ministry of Education Key Laboratory of Coast and Island Development, Nanjing University, Nanjing 210093, China;
2 Water Resources and Environment College, Hehai University, Nanjing 210098, China

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Received Date: April 27, 2007
Revised Date: July 04, 2007

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Abstract

Abstract

In northern Jiangsu coastal zone area, Guanhe is the biggest river and has the best navigation conditions among rivers which flow into the Yellow Sea. The grain sizes show gradually increasing from the high intra-tidal zone to the low intra-tidal zone. The heavy metal values have slight changes along both sides of the river mouth, but show an evident change perpendicular to the tidal flat. In the latter case, they show a good correlation with grain size fluctuation, that is,the heavy metal values gradually decline when the grain sizes increase from the high intra-tidal zone to the low intra-tidal zone.Analysis results of heavy metal elements show that in the Guanhe estuary surface sediments,contents of Hg,As and Cu are beyond background values; Pb and Zn are rather close to the background values; and Cd less than the values.Element Hg comes out to be harmful to ecological environment, while elements Cr,As,Cu,Pb,Zn,and Cd fall in a safe range of MPL. On the whole,Guanhe estuary tidal flat is not seriously ecological harmful due to the heavy metals.
- grain size,
- heavy metals,
- correlation,
- tidal flat,
- Guanhe estuary

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References (14)

References

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SPATIAL ACCUMULATION FEATURES AND ENVIRONMENT EFFICIENCY OF HEAVY METALS IN INTRA-TIDAL SURFACE SEDIMENTS OF GUANHE ESTUARY, NORTHERN JIANGSU