School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
Mar Pollut Bull. 2017 Dec 15;125(1-2):389-398. doi: 10.1016/j.marpolbul.2017.09.046. Epub 2017 Sep 29.
Elevation in toxic trace metal concentration found in coastal sediments in recent years (2013-2016) increased the risk to the aquaculture industry in south Hangzhou bay. This study assessed the main factors controlling the metal distribution and mobility in sediments by sampling from 20 sites along the bank. Spatial distribution and cluster analysis indicated that Cd, As, Hg and Sb attributed to anthropogenic terrestrial sources; while Cr, Co, Cu, Ni, Zn, and Pb, carried by fine-grained sediments and accumulated on tidal flat, were inputted from marine sources. High mobility of Cd was expected because of its considerable proportion (~50%) associated with the acid extractable fraction. Pb, Cu and Co in redox sensitive fraction should also be taken into concern in management of reclaimed area affected by tide. Risk assessments by potential ecological risk index (PERI) emphasised the importance of further monitor and proper treatment of 4 terrestrial generated metals in sediments.
近年来（2013-2016 年），沿海沉积物中有毒痕量金属浓度的升高增加了杭州湾南部水产养殖业的风险。本研究通过在沿岸 20 个地点采样，评估了控制沉积物中金属分布和迁移的主要因素。空间分布和聚类分析表明，Cd、As、Hg 和 Sb 归因于人为陆地来源；而 Cr、Co、Cu、Ni、Zn 和 Pb 则由细颗粒沉积物携带，并从海洋来源积累在潮滩上。由于其相当大的比例（约 50%）与酸可提取部分相关，预计 Cd 的迁移性较高。在受潮汐影响的围垦区管理中，还应注意氧化还原敏感部分的 Pb、Cu 和 Co。潜在生态风险指数（PERI）的风险评估强调了进一步监测和适当处理沉积物中 4 种陆地生成金属的重要性。
