The role of organic acids on Ra-226 transfer factor in corn (Zea mays L.)

摘要

To study the role of citric and oxalic acids on Ra-226 transfer factor (TF) from a soil with 10,000 Bq kg(-1) of Ra-226 activity to corn plant, a greenhouse experiment was conducted. Results revealed that the highest TF in whole plant was 0.063 and in citric acid at 100 mM concentration. It was 1.4 times of control (0.043). Maximum value of TF in shoot and root was 0.015 and 0.049 in citric acid at 10 and 100 mM concentrations, respectively. Organic acids did not extract Ra-226 from this soil, while they reduced the pH of soil extracts compared to control.