The distribution, sources and ecological risk assessment of surficial sediment in the south coastal mud Area off Zhejiang-Fujian
GUO Jun-li1,2, YANG Yang1, GAO Jian-hua1, ZHANG Chen-chen1,2, SHENG Hui1, BAI Feng-long3, ZHANG Dao-lai3
1. Key Laboratory of Coast and Island Development of Ministry of Education, School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China;
2. State Research Centre for Island Exploitation and Management, SecondInstitute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;
3. Qingdao Institute of Marine Geology, Qingdao 266071, China
Abstract:In order to investigate the polycyclic aromatic hydrocarbons (PAHs) contamination of the surficial sediment in the south Coastal Mud Area off Zhejiang-Fujian(CMAZF), the content of polycyclic aromatic hydrocarbons in the surficial sediments were analyzed, and the distribution, sources and ecological threats of polycyclic aromatic hydrocarbons were also discussed. The results showed that the total PAHs concentrations of the surficial sediment in the south CMAZF ranged from 12.95×10-9 to 156.05×10-9. The results of isomeric ratio method and SPSS analysis indicated that PAHs in the study area mainly come from the combustion of coal and oil, and partly from oil source. The assessment results concerning with ecological risk evaluation of PAHs revealed that, to some extent, there might exist ecological risk in the surficial sediment of south CMAZF, and more attention should be paid to protect the marine environment.
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