The Content Distribution and Pollution Assessment of Heavy Metals in the Surface Sediments of Dalian Bay

Qinbang Sun, Fan Gao, Yang Wang, Depeng Li, Zhaolin Chen

2018

Abstract

The distribution of 6 heavy metals sediments samples collected in the coastal waters of Dalian Bay in May 2015, was studied. The results showed that the content range of Cu, Pb, Zn, Cd, Hg and As in the surface sediments samples were 9.10~84.90, 9.80~65.90, 29.70~259.00, 0.12~1.30, 0.021~0.350, 4.18~44.50 mg∙kg-1, and the average values were respectively 34.62, 30.47, 106.50, 0.36, 0.12 and 11.10 mg∙kg-1. Moreover, the content values of Cd and Hg were lower than the background values of the national coastal zone. The quality of marine sediments samples was evaluated by the single-factor pollution index method in this study. The evaluating results showed that the average content of Cu, Pb, Zn, Cd, Hg and As was consistent with the marine sediment quality I standard, and the pollution level of the 6 heavy metals was Cu > Zn > Cd > Hg > As＞Pb. With the Hakanson potential ecological risk index method, the survey data were analyzed. The analysis results showed that the potential ecological risk index level of Dalian Bay was medium, and the potential ecological risk indexes of surface sediments heavy metals were almost similar. The correlation analysis of heavy metals survey data in the surface sediment showed that there was a positive correlation between Cu, Pb, Zn, Cd and As in the surface sediments of the sea area and the correlation coefficient was large, indicating that they had a certain homology. The TOC content was positively correlated to the Cu, Zn and Cd content, and the petroleum was correlated to Cu, Pb, Zn, and Cd content. This indicated that the distribution of heavy metals was effected by TOC and petroleum. The main source of heavy metal pollution in marine sediments was further studied by the principal component analysis, and the contribution rate of the first 2 principal components was 86.87%. Combined with the correlation analysis results, the principal component analysis results showed that the main source of heavy metal Cu, Pb, Zn and Cd in Dalian Bay was the industrial pollution. This paper reveals the distribution characteristics of heavy metals in the sediments of Dalian Bay, and provides scientific basis for the marine ecological civilization constructionand the comprehensive control of marine environment.

Paper Citation

in Harvard Style

Sun Q., Gao F., Wang Y., Li D. and Chen Z. (2018). The Content Distribution and Pollution Assessment of Heavy Metals in the Surface Sediments of Dalian Bay.In The Second International Conference on Materials Chemistry and Environmental Protection - MEEP, ISBN 978-989-758-360-5, pages 311-318. DOI: 10.5220/0008189403110318

in Bibtex Style

@conference{meep18,
author={Qinbang Sun and Fan Gao and Yang Wang and Depeng Li and Zhaolin Chen},
title={The Content Distribution and Pollution Assessment of Heavy Metals in the Surface Sediments of Dalian Bay},
booktitle={The Second International Conference on Materials Chemistry and Environmental Protection - MEEP,},
year={2018},
pages={311-318},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0008189403110318},
isbn={978-989-758-360-5},
}

in EndNote Style

TY - CONF

JO - The Second International Conference on Materials Chemistry and Environmental Protection - MEEP,
TI - The Content Distribution and Pollution Assessment of Heavy Metals in the Surface Sediments of Dalian Bay
SN - 978-989-758-360-5
AU - Sun Q.
AU - Gao F.
AU - Wang Y.
AU - Li D.
AU - Chen Z.
PY - 2018
SP - 311
EP - 318
DO - 10.5220/0008189403110318