Distribution and Source of Main Contaminants in Surface Sediments of Tidal Flats in the Northern Shandong Province

作者：Liu Zhijie^*; Li Peiying; Zhang Xiaolong; Li Ping; Xu Yuanqin

来源：Journal of Ocean University of China, 2014, 13(5): 842-850.

DOI：10.1007/s11802-014-2390-2

• tidal flat sediments
• heavy metals
• quality evaluation
• factor analysis
• source of contaminants
• Northern Shandong Province

Twenty-nine samples of surface sediments from tidal flats in the Northern Shandong Province were collected for grain size, heavy metal (Hg, Cu, Pb, Zn, Cd, and Cr), and oil pollution analyses. The geoaccumulation index (I-geo) and factor analysis were introduced to evaluate sediment quality and source of contaminants. The mean concentrations of Hg, Cu, Pb, Zn, Cd, Cr, and oil in the surface sediments in the study area are 0.033, 17.756, 19.121, 55.700, 0.291, 59.563, and 14.213 mu g g(-1), respectively. The heavy metal contamination in the old delta lobe is slightly higher than that in the abandoned delta lobe; however, the opposite was observed for oil pollution. The Igeo results revealed that the overall quality of the surface sediments in the study area is in good condition. The heavy metal pollution levels show a descending order: Cd> Hg> Cr> Cu> Zn> Pb, Cd being the main pollutant. The contamination level for in the study area is relatively lower than those for China's other tidal flats. Heavy metals are mainly derived from natural sources of rock weathering and erosion, partly influenced by industrial and agricultural discharge. However, oil pollution is mainly from runoff input, motorized fishing boat sewage, and oil exploitation.

• 出版日期2014-10
• 单位烟台大学; 国家海洋局第一海洋研究所; 中国海洋大学; 国家海洋信息中心