In the batch desorption experiment, the water bamboo husk particles loaded with metal ions were immersed in 50 ml of
desorption solution for 1 and 3 h. at room temperature and with shaking at 100 rpm. Two desorption solution were tested:0.1 M HNO3 (pH1.8) and 0.01 EDTA. The desorbed metal ion mount was evaluated by multiplying the metal ion concentration in
desotption solution by the solution volume.