Effect of low molecular weight organic acids on the uptake of Ra by corn (Zea mays L.) in a region of high natural radioactivity in Ramsar-Iran.

To study the benefit of including citric and oxalic acid treatments for phytoremediation of Ra contaminated soils a greenhouse experiment with corn was conducted. A soil was sampled from a region of high natural Ra radioactivity in Ramsar, Iran. After cultivation of corn seed and using organic acid treatments at 1, 10 and 100 mM concentrations, plants (shoots and roots) were harvested, digested and prepared to measure Ra activity.