Abstract:With the comprehensive measurements, the grain size, sediment dating and heavy metals content was investigated in the seven cores of Caofeidian Laolongkou region of Hebei Province, Which goal was to find the control factors and the deposition of heavy metals in tidal. Laolongkou tidal was composited with the fine sand and silt. According to the isotopic dating, the largest deposition rate was L06, which has 0.90cm/a, but deposition rate of the remaining cores were less than 0.5cm/a. The average deposition rate was 0.32cm/a, Caofeidian tidal deposit rate was slowed. Cores fluctuated severely in vertical direction and were significantly affected by human activities. The content of heavy metals in core samples showed an increasing trend start from the 30~40cm depth to the surface. The pollution of Hg, Cr was serious, but the other elements were basically pollution-free. Although the contamination of most heavy metals which was in the vicinity of the background values does not appear, and the ecological danger was very low, heavy metals ecological risk index (ERI) in the region reaches 158.41, affected by moderate ecological risk of Pb, Hg heavy metals, showing moderate ecological harm. The potential ecological risks in the future can’t be ignored.
于文金, 邹欣庆, 朱大奎. 曹妃甸老龙口现代沉积环境及重金属污染特征研究[J]. 中国环境科学, 2011, 31(8): 1366-1376.
YU Wen-Jin, ZOU Xin-Qing, ZHU Da-Kui. Caofeidian Laolongkou modern sedimentary environments and heavy metal pollution. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(8): 1366-1376.