Click on image to view larger version.
Fig. 1. Concentrations of Pb, Cd, and Zn in leaves of Chinese cabbage grown on contaminated soil in response to different EDTA (black) and EDDS (white) addition: 3 mmol kg-1 single dose addition (3S), 5 mmol kg-1 single dose addition (5S), 5 mmol kg-1 weekly additions (5W), 10 mmol kg-1 single dose addition (10S), 10 mmol kg-1 weekly additions (10W), and control soil with no EDTA addition. Means of five replicates are presented; error bars represent standard deviation. Statistically different treatments according to the Tukey test are labeled with different letters.
