Phillips D P, Human L R D, Adams J B
Nelson Mandela Metropolitan University, Summerstrand South Campus, Department of Botany, South Africa.
Nelson Mandela Metropolitan University, Summerstrand South Campus, Department of Botany, South Africa.
Mar Pollut Bull. 2015 Mar 15;92(1-2):227-232. doi: 10.1016/j.marpolbul.2014.12.038. Epub 2015 Jan 16.
In this study metal accumulating abilities of three emergent macrophytes (Phragmites australis, Typha capensis and Spartina maritima) were investigated in the urbanised Swartkops Estuary. Plants and sediment samples were collected at seven sites along the banks of the main channel and in adjacent canals. Sediments and plant organs were analysed, by means of atomic absorption spectrometry, for four elements (Cd, Cu, Pb, and Zn). Metal concentrations in the sediments of adjacent canals were found to be substantially higher than those at sites along the banks of the estuary. These differences were reflected in the plant organs for Pb and Zn, but not for Cu and Cd. All three species exhibited significantly higher concentrations of metals in their roots. These species are therefore suitable for use as indicators of the presence and level of heavy metal contaminants in estuaries.
在本研究中，对城市化的斯瓦特科普斯河口的三种挺水植物（芦苇、南非香蒲和滨海米草）的金属积累能力进行了调查。在主河道两岸和相邻运河的七个地点采集了植物和沉积物样本。通过原子吸收光谱法分析了沉积物和植物器官中的四种元素（镉、铜、铅和锌）。发现相邻运河沉积物中的金属浓度明显高于河口沿岸地点的金属浓度。这些差异在植物器官中的铅和锌含量上有所体现，但在铜和镉含量上没有体现。所有这三个物种的根部金属浓度都显著更高。因此，这些物种适合用作河口重金属污染物存在和水平的指示物。
