College of City and Architecture Engineering, Zaozhuang University, Zaozhuang, Shandong 277160, China; Key Laboratory of Marine Ecology and Environmental Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong 266071, China.
College of City and Architecture Engineering, Zaozhuang University, Zaozhuang, Shandong 277160, China.
Mar Pollut Bull. 2019 Jan;138:206-212. doi: 10.1016/j.marpolbul.2018.11.049. Epub 2018 Nov 24.
The distribution characteristics, sources and ecological risk of thallium (Tl) in the surface sediments of Yangtze Estuary and its adjacent sea were studied. Tl concentrations ranged from 0.369 to 1.197 μg g with an average of 0.674 μg g, which was slightly higher than the corresponding background values. Tl concentrations were relatively high in sediments of the south bank of Chongming Island and the Hangzhou Bay mouth, and gradually decreased from inner shelf to outer seas. The variation trend of Tl concentrations was controlled by sediment characteristics, hydrodynamic conditions and sources together. The sediment flux of Tl in the study area was 428.6 t/yr. The Yangtze River, the Yellow River and atmospheric inputs of Tl accounted for 52.7%, 10.5%, and 0.15% of the total sediment flux, respectively. The result of potential ecological index indicated that Tl in surface sediments of the study area had no threat to the ecological environment.
研究了长江口及其毗邻海域表层沉积物中铊（Tl）的分布特征、来源及其生态风险。Tl 浓度范围为 0.369 至 1.197μg/g，平均值为 0.674μg/g，略高于相应的背景值。崇明岛南岸和杭州湾口的沉积物中 Tl 浓度较高，从内陆架到外海逐渐降低。Tl 浓度的变化趋势受沉积物特征、水动力条件和来源的共同控制。研究区域 Tl 的沉积物通量为 428.6t/yr。长江、黄河和大气输入 Tl 分别占总沉积物通量的 52.7%、10.5%和 0.15%。潜在生态指数的结果表明，研究区域表层沉积物中的 Tl 对生态环境没有威胁。
