Comparing study on the acid volatile sulfide and heavy metals in sediments of marine dumping site during dumping activity on Yangshan

Abstract

Abstract: In order to better understand the pollution state of sediments in a dumping site, the acid volatile sulfides (AVS) and simultaneously extracted metals (SEM) of surface sediments collected from the marine dumping site of Yangshan were determined, while distributions of AVS, ΣSEM, ΣSEM-AVS were also analyzed. The results show that the AVS in the surface sediments of the dumping site and nearby area are 0.55~2.62 μmol·g^-1(before dumping), 0.83~1.65 μmol·g^-1(dumping) and 0.51~1.23 μmol·g^-1(after dumping) respectively, the contents of AVS present a decline trend after dumping, and the AVS in sediments is higher than that in nearby area after dumping. The mean values of ΣSEM in nearby area are 2.80 μmol·g^-1(before dumping), 2.79 μmol·g^-1(dumping) and 2.60 μmol·g^-1 (after dumping) respectively the contents of ΣSEM also present a decline trend after dumping, and the contents of ΣSEM are enriched toward to dumping site. The order of the contribution of heavy metal to ΣSEM is Zn＞Cr＞Cu＞Pb＞Cd, with the contribution of zinc basically being>35%, chromium>20%, cadmium<1%. Therefore, the distribution is mainly controlled by zinc and chromium. The different values of ΣSEM-AVS are larger than zero and lower in the dumping site than that in nearby area, which indicates that the metals (SEM) in the surface sediments of the dumping site probably have some toxicity to the life.

Key words: dumping site, sediments, AVS, SEM

CLC Number:

P736.4⁺1

XU Guo-feng, MAO Wei-hong, LIAO You-gen, XIA Ya-bing, YUAN Guo-jian. Comparing study on the acid volatile sulfide and heavy metals in sediments of marine dumping site during dumping activity on Yangshan[J]. Journal of Marine Sciences, 2013, 31(4): 56-62.

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