Effects of Sediment Dredging on Heavy Metal Removal in Dianchi Lake, China

Abstract:

The heavy metals (Pb, Zn, Cu, Cd, Cr) and metalloid (As) in surface sediments and water samples from un-dredged and dredged areas in Dianchi Lake had been analyzed to investigate the removal efficiency of sediment dredging. Potential ecological risk index (RI) and simplified geoaccumulation risk index (Igeo) were used to assess the heavy metals accumulation and ecological risks. The results indicated that Pb²⁺, Zn²⁺, Cu²⁺, Cd²⁺, Cr²⁺ and As³⁺ were not detected in water of Dianchi Lake, and the heavy metal content of surface sediments in Caohai Lake was in the order of Zn²⁺>Pb²⁺>Cu²⁺>As³⁺>Cr²⁺>Cd²⁺, and that in Waihai Lake was in the order of Zn²⁺>Pb²⁺>Cu²⁺>Cr²⁺>As³⁺>Cd²⁺. Through comparing the heavy metal content in sediments from un-dredged and dredged areas, pollutants reduced after sediment dredging, which can be reflected by the Igeo values too. Potential ecological risk index showed that the potential ecological risks were at low level in Dianchi Lake after sediment dredging.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 1654-1658
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.1654
• Online since: August 2013
• Authors: Qiang Li, Jia Li Zhou, Ying Wang, Hui Li, Bin Huang, Xue Jun Pan
• Keywords: Dianchi Lake, Ecological Risk Index, Heavy Metal, Sediment Dredging, Simplified Geoaccumulation Risk Index

References

[1] P. A. Tanner and L. S. Leong: Metals in a marine sediment core from near Ma Wan, Hong Kong. Water, Air and Soil Pollution. Vol. 121 (2000), pp.309-325.

[2] D. Babi and N. Pano: Evaluation of the heavy metals pollution of the sediments of Vlora Bay Adriatic Sea, Albania. Fresenius Environmental Bulletin. Vol. 7 (2000), pp.577-584.

[3] Information on http://seagrant.gso.uri.edu/region/noeaster99/WHOI.html.

[4] Cangzhou Yan, Chenxin Fan, Jianhua Yang, Xiangcan Jin and Jingzhu Zhao: Prospect and progress of the study on environment dredging technology of lake sediment. Environment pollution and control (2004).

[5] Information on http://epa.gov/OST/cs/aboutcs/overview.html.

[6] J.E. McDowell: Contaminated sediments in the marine environment. Woods Hole Oceanographic Institution (1999).

[7] Hui Li, Ying Wang, Liqiong Shi: Distribution and Fractions of Phosphorus and Nitrogen in Surface Sediments from Dianchi Lake, China. International Jounal of Environmental Research. Vol. 6 (2012), pp.195-208.

[8] Jiali Zhou, Qiang Li, Di Song, Xuejun Pan, Xiangdong Zeng: Method Development and Application for Analysis of Heavy Metals in Soils by Microwave-assisted Digestion and Extraction(2012).

DOI: 10.1109/icbeb.2012.272

[9] L. P. Zhang, X. Ye, and H. Feng: Heavy metal contamination in western Xiamen Bay sediments and its vicinity, China. Marine Pollution Bulletin. Vol. 54 (2007), pp.974-982.

DOI: 10.1016/j.marpolbul.2007.02.010

[10] G. Muller: Die Schwermetallbelastung der sediment des Neckars und seiner Nebenflusse: eine Bestandsaufnahme. Chemical Zeitung. Vol. 105 (1981), pp.157-164.

[11] M. I. Kabir, H. Lee, G. Kim and T. Jun: Correlation assessment and monitoring of the potential pollutants in the surface sediments of Pyeongchang River, Korea. International Journal of Sediment Research.Vol. 26 (2011), pp.152-162.

DOI: 10.1016/s1001-6279(11)60083-8

[12] S. F. Liu, X. F. Shi, Y. G. Liu, Z. W. Zhu, G. Yang and J. J. Gao: Concentration distribution and assessment of heavy metals in sediments of mud area from inner continental shelf of the East China Sea. Environ Earth Science. Vol. 64 (2011), pp.567-579.

DOI: 10.1007/s12665-011-0941-z