Department of Chemistry, Water, Applied and Environmental Chemistry Group, University of Córdoba, Faculty of Basic Sciences, Montería, Colombia.
Department of Chemistry, Water, Applied and Environmental Chemistry Group, University of Córdoba, Faculty of Basic Sciences, Montería, Colombia.
Chemosphere. 2015 May;127:58-63. doi: 10.1016/j.chemosphere.2014.12.073. Epub 2015 Feb 2.
Jatropha curcas plants species were tested to evaluate their phytoremediation capacity in soils contaminated by different levels of mercury. The experimental treatments consisted of four levels of mercury concentrations in the soil - T0, T1, T5, and T10 (0, 1, 5, and 10 μg Hg per g soil, respectively). The total mercury content absorbed by the different plant tissues (roots, stems and leaves) was determined during four months of exposure. The growth behavior, mercury accumulation, translocation (TF) and bioconcentration (BCF) factors were determined. The different tissues in J. curcas can be classified in order of decreasing accumulation Hg as follows: roots>leaves>stems. The highest cumulative absorption of the metal occurred between the second and third month of exposure. Maximum TF was detected during the second month and ranged from 0.79 to 1.04 for the different mercury concentrations. Values of BCF ranged from 0.21 to 1.43. Soils with T1 showed significantly higher BCF (1.43) followed by T10 (1.32) and T5 (0.91), all of them at the fourth month. On the other hand TFs were low (range 0.10-0.26) at the en of the experiment. The maximum reduction of biomass (16.3%) occurred for T10 (10 μg Hg g(-1)). In sum, J. curcas species showed high BCFs and low TFs, and their use could be a promising approach to remediating mercury-contaminated soils.
麻疯树植物物种被测试以评估其在受不同水平汞污染的土壤中的植物修复能力。实验处理包括土壤中汞的四个浓度水平 - T0、T1、T5 和 T10（分别为 0、1、5 和 10μg Hg/g 土壤）。在暴露的四个月中，测定了不同植物组织（根、茎和叶）吸收的总汞含量。测定了生长行为、汞积累、迁移（TF）和生物浓缩（BCF）因子。麻疯树的不同组织可以按汞积累减少的顺序分类，如下所示：根＞叶＞茎。金属的最高累积吸收发生在暴露的第二和第三个月之间。最大 TF 发生在第二个月，不同汞浓度的 TF 值范围为 0.79 至 1.04。BCF 值范围为 0.21 至 1.43。T1 土壤的 BCF（1.43）明显较高，其次是 T10（1.32）和 T5（0.91），均在第四个月。另一方面，实验结束时 TF 较低（范围为 0.10-0.26）。T10（10μg Hg/g）的生物量最大减少（16.3%）。总之，麻疯树物种表现出高 BCF 和低 TF，它们的使用可能是修复受汞污染土壤的有前途的方法。
