Department of Science, Faculty of Science and Technology, Prince of Songkla University Pattani Campus, Pattani 94000, Thailand.
Mahidol University, Nakhonsawan Campus, Nakhonsawan 60130, Thailand.
Mar Pollut Bull. 2017 Feb 15;115(1-2):391-400. doi: 10.1016/j.marpolbul.2016.12.050. Epub 2016 Dec 21.
Little is known regarding phytoremediation of radionuclides from soil; even less is known about radionuclide contamination and removal in tropical ecosystems such as mangrove forests. In mangrove forests in Pattani Bay, Thailand, 18 plant species from 17 genera were evaluated for radionuclide concentrations within selected plant parts. Two shrub species, Avicennia marina and Pluchea indica, accumulated the highest Th (24.6Bqkg) and K (220.7Bqkg) activity concentrations in roots, respectively. Furthermore, the aquatic species Typha angustifolia accumulated highest Th, K and Ra activity concentrations (85.2, 363.5, 16.6Bqkg, respectively) with the highest transfer factors (TFs) (3.0, 2.0, 5.9, respectively) in leaves. Leaves of T. angustifolia had an absorbed dose rate in air (D) over the recommended value (74.8nGyh) that was considered sufficiently high to be of concern for human consumption.
关于植物修复土壤中放射性核素的问题知之甚少；对于热带生态系统（如红树林）中的放射性核素污染和去除问题更是知之甚少。在泰国攀牙湾的红树林中，对来自 17 个属的 18 种植物的特定植物部分的放射性核素浓度进行了评估。两种灌木物种，海芒果和白花臭牡丹，其根部的钍（24.6Bqkg）和钾（220.7Bqkg）活性浓度最高。此外，水生植物窄叶香蒲在叶片中积累了最高的钍、钾和镭活性浓度（分别为 85.2、363.5 和 16.6Bqkg），并具有最高的转移因子（分别为 3.0、2.0 和 5.9）。窄叶香蒲叶片的空气中吸收剂量率（D）超过了推荐值（74.8nGyh），这被认为是足够高的，值得关注其是否可供人类食用。
